Experimental treatment of androgenic alopecia

Management of androgenic alopecia

Experimental treatment of androgenic hair loss is a vast and expanding industry.
Classification and external resources
ICD-10 L64.1
ICD-9 704.0
DiseasesDB 7773
MedlinePlus 001177
eMedicine derm/21
MeSH D000505

The experimental treatment of androgenic hair loss is vast, with systemic and topical therapies with varying degrees of efficacy. In the United States alone, it is a multi-billion dollar industry. The entire field of research cannot be appropriately addressed in a single article, but the following discusses those with the greatest amount of peer reviewed research and recognition.

Experimental medical treatment

Bimatoprost and latanoprost

Prostaglandin F2α (PGF2a) analogues induces hair regrowth in animal models of androgenic alopecia with transgenic mice,[1] and stump-tailed macaques,[2] and initially generated 'great expectations' in pharmaceutical research for potential effectiveness in alopecia.[3] Latanoprost and bimatoprost are specific PGF2a analogues applied topically, and have been found to lengthen eyelashes,[4][5] darken hair pigmentation[6] and elongate hair.[7] Bimatoprost (Latisse®) is available as treatment for eyelash growth.[8] Latanoprost (Xalatan®) has shown ability to promote scalp hair density and pigmentation,[9] and is theorized to function at the dermal papilla.[10] A study found latanoprost ineffective on eyelashes in a patient with alopecia areata.[11] It has also been found ineffective in treatment of eyebrow hair loss.[12]

Cyproterone acetate

Cyproterone acetate is a topical agent in a lipid suspension that has anti-androgenic activity at the pilosebaceous unit.[13] It has shown similar efficacy to 2% minoxidil in treatment of female androgenic hair loss, with cyproterone acetate being more effective when women had high body mass indices, and minoxidil more effective when they weighed less.[14] It has also been shown effective in acne and hirsutism, but no longer marketed due to theoretical risks of venous thromboembolism. More recent studies have shown that this risk is no greater than that seen with oral contraceptives.[15]

Estrogen

Estrogens are indirect anti-androgens, and can be used to treat androgenetic hair loss in females with oral contraceptives. Systemic estrogen increases SHBG, which binds androgens, including testosterone and DHT, in turn reducing their bioavailability. Topical formulations are available in Europe.[16] Hair follicles have estrogen receptors and it is theorized topical compounds act on them directly to promote hair growth and antagonize androgen action. Large clinical studies showing effectiveness are absent. Topical treatment is also usually unavailable in North America.[7]

HIF-1

HIF-1 help prevents apoptosis, or cell death, in hypoxic conditions. In vitro, when supernatant from HIF-1 transfected fibroblast cells was administered to hair follicle cells, it induced VEGF, which had stimulatory effects on hair follicle cells. VEGF promotes growth of blood vessels, which would be an appropriate response to low oxygen conditions.[17] Other studies have suggested hypoxia initiates a potentially self-perpetuating cycle involving HIF, VEGF, and AKT activation. Ciclopirox, otherwise known as ciclopiroxolamine, is used as a topical shampoo, has anti-fungal properties, and may induce HIF-1.[18]

IGF-1

In December 2012, topical application of IGF-1 in a liposomal vehicle led to thicker and more rapid hair growth in transgenic mice with androgenic alopecia. The study did not show measurable systemic levels or hematopoietic side effects, suggesting potential for use in humans.[19] Low energy radiofrequency irradiation induces IGF-1 in cultured human dermal papilla cells.[20] Adenosine stimulates dermal papillae in vitro to induce IGF-1, along with fibroblast growth factors FGF7, FGF-2 and VEGF. β-catenin transcription increased, which promotes dermal papillae as well.[20] Dietary isoflavones increase IGF production in scalp dermal papillae in transgenic mice.[21] Topical capsaicin also stimulates IGF at hair follicles via release of vanilloid receptor-1, which in turn leads to more CGRP.[22][23] Ascorbic acid has led to increased IGF expression in vitro.[24]

Piroctone Olamine

Piroctone olamine is a topical agent that has similar efficacy to 1% ketoconazole in small controlled trials.

Prostaglandin D2

In 2012, scientists found the lipid prostaglandin D2 (PGD2) in balding male scalps at levels higher than controls, and theorized it prevented hair follicles maturation. The lead investigator said treatment could be possible within two years.[25][26][27]

Valproic acid

Mouse models have found valproic acid activates alkaline phosphatase in human dermal papilla cells and induces hair regeneration in transgenic mice.[28] Systemic valproic acid can cause alopecia,[29] although this may be related to deficiencies of biotin and zinc.[30][31]

Wnt protein introduction

Androgens interact with the Wnt signalling pathway to cause hair loss; researchers are also affecting the pathway in animal models.

In May 2007, U.S. company Follica Inc licensed technology from the University of Pennsylvania to regenerate hair follicles by reawakening genes from embryonic development. Studies began with the study of hair regrowth in wound healing in mice when Wnt proteins were introduced. Time till development of pharmaceutical treatment is expected to take several years.[32][33]

In other methods, cells are cultured and the supernatant is processed to produce a compound rich in hair growth promoting factors, like Wnt proteins. This approach is still in Phase I or II trials. Platelet rich plasma (PRP) isolated from whole blood can be used for its growth factors and stimulatory mediators. Some hair transplant surgeons use this product to encourage transplanted graft growth.[34] PRP is also available as a standalone treatment for AGA, though there is only one small study to date in its support.[35]

Dietary and health supplements

The dietary supplement industry is distinct from the pharmaceutical industry, and is more loosely regulated than FDA approved medications. The most commonly used and well researched plants are saw palmetto (Serenoa repens), stinging nettle (Urtica dioica), turmeric (Curcubita pepo), and pygeum africanum (Prunus africana).[36] Other herbs include black cohosh (Actaea racemosa), dong quai (Angelica sinensis), false unicorn (Chamaelirium luteum), chasteberry (Vitex agnus-castus), and red clover (Trifolium pratense). Each of them purport hair promoting effects by various mechanisms. Common nutritional supplements include biotin, caffeine and melatonin.[16][37]

5 alpha reductase inhibitors

A number of herbal substances have been reported to inhibit 5 alpha reductase, the enzyme which catalyzes conversion of testosterone to DHT to cause androgenic miniaturization at the hair follicle dermal papilla. Examples of inhibitors include certain unsaturated aliphatic fatty acids, such as gamma-linolenic acid and myristoleic acid, as well as other natural compounds, including alizarin and curcumin, and green tea catechins, including (-)-epicatechin-3-gallate, and (-)-epigallo-catechin-3-gallate (EGCG).[38] Zinc,[39] azelaic acid,[39] β-sitosterol,[40] certain unsaturated aliphatic fatty acids such as gamma-linolenic acid, alpha-linolenic acid, linoleic acid, myristoleic acid, and oleic acid,[41] and a variety of polyphenols[42] have been found to inhibit 5α-reductase activity to varying degrees. Other inhibitors include alizarin, curcumin, and green tea catechins, including (-)-epicatechin-3-gallate, and (-)-epigallo-catechin-3-gallate (EGCG).[38]

Among polyphenols, valoneic acid dilactone and gallagyldilactone, two hydrolysable tannins isolated from the heartwood of Shorea laeviforia[43] and in oaks species like the North American white oak (Quercus alba) and European red oak (Quercus robur),[44] shows an inhibitory effect on 5α-reductase. Certain pesticides are able to disturb the sex steroid hormone system and to act as antiandrogens.[45]

Compounds in nature are able to inhibit 5α-reductase, such as the chemical found in the Reishi mushroom Ganoderma lucidum.[46] [47][48] Ganoderic acid[49] or organoderol B are thought to be the compounds in the mushroom that are specifically active.[50]

Medium chain fatty acids such as those found in coconut and the kernel of many palm fruits also inhibit 5α-reductase.[51]

Other herbs include:

These supplements have limited testing in human clinical trials, and their complete potential for treatment of androgenic hair loss.

Saw palmetto

Saw palmetto (Sabal serrulatum or Serenao repens) may inhibit 5 alpha reductase and is approved for treatment of prostate disorders in Germany as well.[71] Studies of Italian men have found it effective at 320 mg/day at improving symptoms of prostate enlargement.[72] A meta-analysis looking at effects of Serenao in BPH and prostate adenocarcinoma was unable to make conclusions regarding its effects in BPH due to limitations of studies in the literature.[73]

Nettle

Nettle (Urtica dioica) inhibits 5 alpha reductase in vitro when given in combination with Pygeum africanum.[74] It ameliorates symptoms of BPH in rats,[75] and has been found protective against reperfusion injury in organ ischemia.[76] In testosterone treated animal models when compared to finasteride, it has been found therapeutic for prostatic hyperplasia, although less efficate than the medication.[77] It has also shown to impair inflammation by inhibiting platelet aggregation.[78] Patients treated with the plant have also shown reduced need for anti-inflammatory medication.[79] Nettle is approved for treatment of prostate disorders in Germany.[71]

Pygeum africanum

Pygeum africanum inhibits 5 alpha reductase in vitro when given with Nettle (Urtica dioica).[74] In vitro cultured prostate stromal cells from patients with BPH show the herb to induce apoptosis.[80] N-butylbenzene-sulfonamide (NBBS), isolated from Pygeum africanum bark, acts as an androgen antagonistic, inhibits AR nuclear translocation and prostate cancer cell growth.[81] Atraric acid, isolated from bark material of Pygeum africanum, has anti-androgenic activity, inhibiting transactivation mediated by ligand-activated human AR.[82] A meta-analysis looking at effects of Pygeum africanum in BPH and prostate adenocarcinoma was unable to make conclusions regarding its effects in BPH due to limitations of studies in the literature.[73]

L-Arginine

L-Arginine is the amino acid precursor to nitric oxide. Nitric oxide itself is a free radical with an unpaired electron, and has a role in host immune defense against pathogens. Citrulline is produced as a side product by nitric oxide synthase. Consumption of 5 to 9 grams of arginine leads to growth hormone release.[83] The enzyme trichohyalin specifically converts arginine to citrulline at the inner root sheath and medulla of hair follicles.[84] Administration of arginine prior to resistance exercise attenuates the growth hormone response.[85] In vitro studies have shown dermal papilla cells derived from human hair follicles spontaneously produce nitric oxide. Basal nitric oxide levels are enhanced threefold by stimulating dermal papilla cells with 5alpha-dihydrotestosterone (DHT) but not with testosterone. Addition of N-[3-(aminomethyl)benzyl]acetamidine (1400W), a highly selective inhibitor of inducible nitric oxide synthase, restrained DHT induced elevation in nitric oxide.[86] Androgens enhance inducible nitric oxide synthase from occipital dermal papillae cells.[87]

Biotin and MSM

Biotin is taken as a health supplement, although it is not usually recommended by nutritionists, as it is already produced as a byproduct of gut bacteria. Patients with biotinidase deficiency have been reported.[88] Deficiencies can also occur in patients on long term TPN[89] and after modified Whipple procedures.[90] In its fulminant form and more often in children, biotinidase deficiency is characterized skin rashes, developmental delay, seizures, seborrheic dermatitis, alopecia and acidosis.[91] In forme fruste it can present as hair loss occurring only during times of stress.[92] Treatment involves replacement of biotin, and treatment of underlying malabsorptive disorder if contributive.[93] Biotin supplementation was found beneficial in a case of familial unruly hair.[94] Deficiencies can be detected by urine assay.[95]

Capsaicin

Capsaicin is the active ingredient in chili pepper and works through TRPV receptor. Animal and human studies showing it affects hair regrowth.

The transient receptor potential vanilloid type 1 ion channel (TRPV1) mediates the intense burning sensation after exposure to heat greater than approximately 43°C, or capsaicin, the pungent ingredient of hot chilli peppers. This receptor may play an important role in regulation of the hair follicle cycle.[96] An early study in animal models showed that substance P induced by capsaicin stimulated hair growth.[97] It also promotes neural innervation of hair follicles in neonatal animal studies.[98][99] A study in which a combination of subcutaneous capsaicin and isoflavone was administered to bald (CGRP knockout) mice dermal IGF-1 at hair follicles and hair regrowth. The mechanism was thought to be through activation of vanilloid receptor-1 causing release of CGRP from neurons, in turn causing release of IGF-1. Human volunteers administered oral isoflavone and capsaicin also showed hair regrowth.[22] Other studies on less nociceptive medications found topical raspberry extract to work through a similar mechanism as capsaicin.[100] However, recent studies on rats in which skin was denervated by capsaicin showed slower egress of stem cells after wounding, suggesting a mechanism for slower healing with dennervation.[101] In vitro studies have not been consistent. Vanilloid receptor-1 (VR1, or transient receptor potential vanilloid-1 receptor, TRPV1) is activated by capsaicin, the key ingredient of hot peppers. In organ culture, capsaicin activation of TRPV1 caused dose-dependent inhibition of hair elongation, suppressed proliferation, induced apoptosis, caused premature regression (catagen), and up-regulated TGF-β2[102] The same research group found that TRPV1 activation also inhibits sebum formation.[103] Transient receptor potential vanilloid subtype 1 (TRPV1) is a non-selective cation channel activated by capsaicin, is also activated by 4 essential oil — rose, thyme geraniol, palmarosa, and tolu balsam.[104]

L-Carnitine

In vitro studies suggest L-carnitine induces hair growth, and it is a component of some dietary supplements.[105][106][107]

Curcumin

Curcumin, from Curcuma longa, is the yellow curry pigment in turmeric, an herb used in traditional Indian and east Asian cuisine. It has been reported modulate several pathways including cellular proliferation, apoptosis, inflammation, and androgen receptor signaling.[108][109] Specifically, curcumin has been reported to enhance androgen receptor (AR) degradation.[110] In vitro studies of keratinocytes showed it to oppose TGF-beta1 release, which DHT induces. TGF-beta1 induces anagen in hair follicles.[111] It also has weak affinity for the vitamin D receptor.[112] It has been shown to work via a glutathione (GSH)-linked detoxification mechanisms in rats and ex vivo human models.[113] Studies on prostate cancer with curcumin alone, or coupled to anti-androgens, suggest it prevents growth by inhibiting pseudopodia formation.[114] 3-dimensional imaging has shown curcumin to conform to the androgen receptor,[115] which other studies have confirmed.[116] In combination with soy, it is inhibitory for symptoms of BPH.[117] ASC-J9, a derivative of curcumin, has been used to target androgen receptors for degradation.[118] It also down regulates androgen receptor gene expression.[119] Curcumin enhances cytotoxicity of chemotherapeutic agents in prostate cancer cells by inducing p21(WAF1/CIP1) and C/EBPbeta expressions and suppressing NF-kappaB activation.[120]

3,3′-Diindolylmethane

3,3'-Diindolylmethane (DIM) is a compound derived from the digestion of indole-3-carbinol, found in cruciferous vegetables such as broccoli, brussels sprouts, cabbage and kale.[121] The reputation of Brassica vegetables as healthy foods rests in part on the activities of diindolylmethane.[122][123] Controlled studies have shown activity in the Wnt signalling pathway in prostate cancer.[124] In androgen receptor sensitive disease, it specifically acts through the Wingless pathway.[125]

Emu oil

The emu, or Dromaius novaehollandiae, is a large flightless bird native to Australia. Its oil extract increases levels of prostaglandin E, and reduces transdermal inflammation when applied topically.[126] Quality of bird diet affects the amount of polyunsaturated fat in the oil extract, which could limit standardization of effect.[127] The oil is high in nonpolar monounsaturated fatty acids, which may explain its ability to easily pass through the stratum corneum of the skin. It also reduces levels of TGF-alpha, which plays a part in the inflammatory response.[128] The oil has been used therapeutically in traditional Aboriginal medicine for centuries, and is preferred to mineral oil in cosmetic studies.[129]

Ginger

Ginger may decrease levels of Prostaglandin F2 (PGF2). Older studies on Zingiber officinale roscoe does not affect platelet activity ex vivo.[130] More recent work on Zingiber cassumunar showed two of its specific phenylbutenoid monomers to have moderate inhibitory activity.[131] Ginger inhibits eicosanoid formation in phase II studies of people at risk for colon cancer, suggesting anti-inflammatory properties.[132] It also suppresses production of free radicals, proinflammatory proteins, and cancer cells in ex vivo and in vitro conditions.[133] When applied topically, ginger extracts protect against inflammation in UV damaged skin in animal models.[134]

Grape seed extract

Proanythocyanidin oligomers, extracted from grape seeds and applied topically, promote hair growth in vitro, and induce anagen in vivo. Procyanidin C2 was the subtype of extract most effective.[135] Another study found grape seed extract to promote over twice as much hair follicle proflieration than controls.[136] Grape seed also contains resveratrol, a plant compound also found in red wine and Japanese knotweed, and which some experiments have shown to slow aging.[137]

Grateloupia elliptica

In 2012, a Korean scientific study showed that Grateloupia elliptica, a red seaweed native to Jeju Island, South Korea, has the potential to treat androgenic alopecia and alopecia areata.[138][139]

See also

References

  1. Sasaki, S.; Hozumi, Y.; Kondo, S. (2005). "Influence of prostaglandin F2alpha and its analogues on hair regrowth and follicular melanogenesis in a murine model". Experimental Dermatology 14 (5): 323–328. doi:10.1111/j.0906-6705.2005.00270.x. PMID 15854125.
  2. Uno, H.; Zimbric, M. L.; Albert, D. M.; Stjernschantz, J. (2002). "Effect of latanoprost on hair growth in the bald scalp of the stump-tailed macacque: A pilot study". Acta dermato-venereologica 82 (1): 7–12. doi:10.1080/000155502753600803. PMID 12013211.
  3. Wolf, R.; Matz, H.; Zalish, M.; Pollack, A.; Orion, E. (2003). "Prostaglandin analogs for hair growth: Great expectations". Dermatology online journal 9 (3): 7. PMID 12952754.
  4. Law, S. K. (2010). "Bimatoprost in the treatment of eyelash hypotrichosis". Clinical ophthalmology (Auckland, N.Z.) 4: 349–358. doi:10.2147/opth.s6480. PMC 2861943. PMID 20463804.
  5. Tosti, A.; Pazzaglia, M.; Voudouris, S.; Tosti, G. (2004). "Hypertrichosis of the eyelashes caused by bimatoprost". Journal of the American Academy of Dermatology 51 (5): S149–S150. doi:10.1016/j.jaad.2004.05.002. PMID 15577756.
  6. Wand, M. (1997). "Latanoprost and hyperpigmentation of eyelashes". Archives of ophthalmology 115 (9): 1206–1208. doi:10.1001/archopht.1997.01100160376025. PMID 9298071.
  7. 7.0 7.1 McElwee, K. J.; Shapiro, J. S. (2012). "Promising therapies for treating and/or preventing androgenic alopecia". Skin therapy letter 17 (6): 1–4. PMID 22735503.
  8. Banaszek, A. (2011). "Company profits from side effects of glaucoma treatment". Canadian Medical Association Journal 183 (14): E1058–E10F1. doi:10.1503/cmaj.109-3919. PMC 3185096. PMID 21876012.
  9. Blume-Peytavi, U.; Lönnfors, S.; Hillmann, K.; Garcia Bartels, N. (2012). "A randomized double-blind placebo-controlled pilot study to assess the efficacy of a 24-week topical treatment by latanoprost 0.1% on hair growth and pigmentation in healthy volunteers with androgenetic alopecia". Journal of the American Academy of Dermatology 66 (5): 794–800. doi:10.1016/j.jaad.2011.05.026. PMID 21875758.
  10. Johnstone, M. A.; Albert, D. M. (2002). "Prostaglandin-induced hair growth". Survey of ophthalmology. 47 Suppl 1: S185–S202. PMID 12204716.
  11. Roseborough, I.; Lee, H.; Chwalek, J.; Stamper, R. L.; Price, V. H. (2009). "Lack of efficacy of topical latanoprost and bimatoprost ophthalmic solutions in promoting eyelash growth in patients with alopecia areata". Journal of the American Academy of Dermatology 60 (4): 705–706. doi:10.1016/j.jaad.2008.08.029. PMID 19293023.
  12. Ross, E. K.; Bolduc, C.; Lui, H.; Shapiro, J. (2005). "Lack of efficacy of topical latanoprost in the treatment of eyebrow alopecia areata". Journal of the American Academy of Dermatology 53 (6): 1095–1096. doi:10.1016/j.jaad.2005.06.031. PMID 16310083.
  13. Štecová, J.; Mehnert, W.; Blaschke, T.; Kleuser, B.; Sivaramakrishnan, R.; Zouboulis, C. C.; Seltmann, H.; Korting, H. C.; Kramer, K. D.; Schäfer-Korting, M. (2007). "Cyproterone Acetate Loading to Lipid Nanoparticles for Topical Acne Treatment: Particle Characterisation and Skin Uptake". Pharmaceutical Research 24 (5): 991–1000. doi:10.1007/s11095-006-9225-9. PMID 17372681.
  14. Vexiau, P.; Chaspoux, C.; Boudou, P.; Fiet, J.; Jouanique, C.; Hardy, N.; Reygagne, P. (2002). "Effects of minoxidil 2% vs. Cyproterone acetate treatment on female androgenetic alopecia: A controlled, 12-month randomized trial". The British journal of dermatology 146 (6): 992–999. doi:10.1046/j.1365-2133.2002.04798.x. PMID 12072067.
  15. Franks, S.; Layton, A.; Glasier, A. (2007). "Cyproterone acetate/ethinyl estradiol for acne and hirsutism: Time to revise prescribing policy". Human Reproduction 23 (2): 231–232. doi:10.1093/humrep/dem379. PMID 18083746.
  16. 16.0 16.1 Blumeyer, A.; Tosti, A.; Messenger, A.; Reygagne, P.; Del Marmol, V.; Spuls, P. I.; Trakatelli, M.; Finner, A.; Kiesewetter, F.; Trüeb, R.; Rzany, B.; Blume-Peytavi, U. (2011). "Evidence-based (S3) guideline for the treatment of androgenetic alopecia in women and in men". JDDG: Journal der Deutschen Dermatologischen Gesellschaft 9: S1–57. doi:10.1111/j.1610-0379.2011.07802.x. PMID 21980982.
  17. Dai, Y. Q.; Fan, W. X.; Wu, L.; Li, M. Y. (2007). "Effect of hypoxia inducible factor-1alpha on cells of hair follicle". Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae 29 (2): 217–221. PMID 17536272.
  18. Roques, C.; Brousse, S.; Panizzutti, C. D. (2006). "In vitro antifungal efficacy of ciclopirox olamine alone and associated with zinc pyrithione compared to ketoconazole against Malassezia globosa and Malassezia restricta reference strains". Mycopathologia 162 (6): 395–400. doi:10.1007/s11046-006-0075-0. PMID 17146583.
  19. Castro, R. F.; Azzalis, L. A.; Feder, D.; Perazzo, F. F.; Pereira, E. C.; Junqueira, V. B. C.; Rocha, K. C.; Machado, C. D. A.; Paschoal, F. C.; Gnann, L. A.; Fonseca, F. L. A. (2012). "Safety and efficacy analysis of liposomal insulin-like growth factor-1 in a fluid gel formulation for hair-loss treatment in a hamster model". Clinical and Experimental Dermatology 37 (8): 909–912. doi:10.1111/j.1365-2230.2012.04441.x. PMID 22924775.
  20. 20.0 20.1 Yoon, S. Y.; Kim, K. T.; Jo, S. J.; Cho, A. R.; Jeon, S. I.; Choi, H. D.; Kim, K. H.; Park, G. S.; Pack, J. K.; Kwon, O. S.; Park, W. Y. (2011). Najbauer, Joseph, ed. "Induction of Hair Growth by Insulin-Like Growth Factor-1 in 1,763 MHz Radiofrequency-Irradiated Hair Follicle Cells". PLoS ONE 6 (12): e28474. doi:10.1371/journal.pone.0028474. PMC 3229574. PMID 22164296.
  21. Zhao, J.; Harada, N.; Kurihara, H.; Nakagata, N.; Okajima, K. (2011). "Dietary isoflavone increases insulin-like growth factor-I production, thereby promoting hair growth in mice". The Journal of Nutritional Biochemistry 22 (3): 227–233. doi:10.1016/j.jnutbio.2010.01.008. PMID 20576422.
  22. 22.0 22.1 Harada, N.; Okajima, K.; Arai, M.; Kurihara, H.; Nakagata, N. (2007). "Administration of capsaicin and isoflavone promotes hair growth by increasing insulin-like growth factor-I production in mice and in humans with alopecia". Growth Hormone & IGF Research 17 (5): 408–415. doi:10.1016/j.ghir.2007.04.009. PMID 17569567.
  23. Okajima, K.; Harada, N. (2008). "Promotion of insulin-like growth factor-I production by sensory neuron stimulation; molecular mechanism(s) and therapeutic implications". Current medicinal chemistry 15 (29): 3095–3112. doi:10.2174/092986708786848604. PMID 19075656.
  24. Kwack, M. H.; Shin, S. H.; Kim, S. R.; Im, S. U.; Han, I. S.; Kim, M. K.; Kim, J. C.; Sung, Y. K. (2009). "L-Ascorbic acid 2-phosphate promotes elongation of hair shafts via the secretion of insulin-like growth factor-1 from dermal papilla cells through phosphatidylinositol 3-kinase". British Journal of Dermatology 160 (6): 1157–1162. doi:10.1111/j.1365-2133.2009.09108.x. PMID 19416266.
  25. Malm, Sara (August 19, 2012). "Baldness cure which reverses genetics could start clinical trials in two years". Daily Mail (London).
  26. Adams, Stephen (August 19, 2012). "Baldness cure could be on shelves in two years". The Daily Telegraph (London).
  27. Eisenberg, Anne (July 28, 2012). "Baldness Battle, Fought in the Follicle". The New York Times.
  28. Lee, S. H.; Yoon, J.; Shin, S. H.; Zahoor, M.; Kim, H. J.; Park, P. J.; Park, W. S.; Min Do, D. S.; Kim, H. Y.; Choi, K. Y. (2012). Bridger, Joanna Mary, ed. "Valproic Acid Induces Hair Regeneration in Murine Model and Activates Alkaline Phosphatase Activity in Human Dermal Papilla Cells". PLoS ONE 7 (4): e34152. doi:10.1371/journal.pone.0034152. PMC 3323655. PMID 22506014.
  29. Khan, T. A.; Sheng, H.; Mercke, Y. K.; Lippmann, S. B. (1999). "Divalproex-induced alopecia: A case report". Psychiatric services (Washington, D.C.) 50 (11): 1500. PMID 10543866.
  30. Castro-Gago, M.; Perez-Gay, L.; Gomez-Lado, C.; Castineiras-Ramos, D. E.; Otero-Martinez, S.; Rodriguez-Segade, S. (2011). "The Influence of Valproic Acid and Carbamazepine Treatment on Serum Biotin and Zinc Levels and on Biotinidase Activity". Journal of Child Neurology 26 (12): 1522–1524. doi:10.1177/0883073811409227. PMID 21642615.
  31. Yilmaz, Y.; Tasdemir, H. A.; Paksu, M. S. (2009). "The influence of valproic acid treatment on hair and serum zinc levels and serum biotinidase activity". European Journal of Paediatric Neurology 13 (5): 439–443. doi:10.1016/j.ejpn.2008.08.007. PMID 18922714.
  32. First Demonstration of New Hair Follicle Generation in an Animal Model | PENN Medicine News
  33. Study offers hope of baldness remedy | msnbc.com
  34. Rose, P. (2011). "The Latest Innovations in Hair Transplantation". Facial Plastic Surgery 27 (4): 366–377. doi:10.1055/s-0031-1283055. PMID 21792780.
  35. Takikawa, M.; Nakamura, S.; Nakamura, S.; Ishirara, M.; Kishimoto, S.; Sasaki, K.; Yanagibayashi, S.; Azuma, R.; Yamamoto, N.; Kiyosawa, T. (2011). "Enhanced Effect of Platelet-Rich Plasma Containing a New Carrier on Hair Growth". Dermatologic Surgery 37 (12): 1721–1729. doi:10.1111/j.1524-4725.2011.02123.x. PMID 21883644.
  36. Azimi, H.; Khakshur, A. A.; Aghdasi, I.; Fallah-Tafti, M.; Abdollahi, M. (2012). "A review of animal and human studies for management of benign prostatic hyperplasia with natural products: Perspective of new pharmacological agents". Inflammation & allergy drug targets 11 (3): 207–221. doi:10.2174/187152812800392715. PMID 22512478.
  37. Rogers, N. E.; Avram, M. R. (2008). "Medical treatments for male and female pattern hair loss". Journal of the American Academy of Dermatology 59 (4): 547–566; quiz 566–8. doi:10.1016/j.jaad.2008.07.001. PMID 18793935.
  38. 38.0 38.1 Liao, S.; Lin, J.; Dang, M. T.; Zhang, H.; Kao, Y. H.; Fukuchi, J.; Hiipakka, R. A. (2001). "Growth suppression of hamster flank organs by topical application of catechins, alizarin, curcumin, and myristoleic acid". Archives of dermatological research 293 (4): 200–205. doi:10.1007/s004030000203. PMID 11380153.
  39. 39.0 39.1 Stamatiadis D, Bulteau-Portois MC, Mowszowicz I (November 1988). "Inhibition of 5 alpha-reductase activity in human skin by zinc and azelaic acid". The British Journal of Dermatology 119 (5): 627–32. doi:10.1111/j.1365-2133.1988.tb03474.x. PMID 3207614.
  40. Cabeza M, Bratoeff E, Heuze I, Ramírez E, Sánchez M, Flores E (2003). "Effect of beta-sitosterol as inhibitor of 5 alpha-reductase in hamster prostate". Proceedings of the Western Pharmacology Society 46: 153–5. PMID 14699915.
  41. Liang, T.; Liao, S. (1992). "Inhibition of steroid 5 alpha-reductase by specific aliphatic unsaturated fatty acids". The Biochemical journal. 285 ( Pt 2) (Pt 2): 557–562. PMC 1132824. PMID 1637346.
  42. Hiipakka RA, Zhang HZ, Dai W, Dai Q, Liao S (March 2002). "Structure-activity relationships for inhibition of human 5alpha-reductases by polyphenols". Biochemical Pharmacology 63 (6): 1165–76. doi:10.1016/s0006-2952(02)00848-1.
  43. 5A-Reductase inhibitory tannin-related compounds isolated from Shorea laeviforia. Yoshio Hirano, Ryuichiro Kondo and Kokki Sakai, Journal of wood science, Volume 49, Number 4, pp.339-343,doi:10.1007/s10086-002-0481-y
  44. Analysis of oak tannins by liquid chromatography-electrospray ionisation mass spectrometry. Pirjo Mämmelä, Heikki Savolainenb, Lasse Lindroosa, Juhani Kangasd and Terttu Vartiainen, Journal of Chromatography A, Volume 891, Issue 1, 1 September 2000, Pages 75-83, doi:10.1016/S0021-9673(00)00624-5 PMID 10999626
  45. Lo, S; King, I; Alléra, A; Klingmüller, D (2007). "Effects of various pesticides on human 5alpha-reductase activity in prostate and LNCaP cells.". Toxicology in vitro : an international journal published in association with BIBRA 21 (3): 502–8. doi:10.1016/j.tiv.2006.10.016. PMID 17218080.
  46. Liu, J.; Kurashiki, K.; Shimizu, K.; Kondo, R. (2006). "5alpha-reductase inhibitory effect of triterpenoids isolated from Ganoderma lucidum". Biological & pharmaceutical bulletin 29 (2): 392–395. doi:10.1248/bpb.29.392. PMID 16462054.
  47. Liu, J; Tamura, S; Kurashiki, K; Shimizu, K; Noda, K; Konishi, F; Kumamoto, S; Kondo, R (2009). "Anti-androgen effects of extracts and compounds from Ganoderma lucidum.". Chemistry & Biodiversity 6 (2): 231–43. doi:10.1002/cbdv.200800019. PMID 19235153.
  48. Noguchi, M; Kakuma, T; Tomiyasu, K; Yamada, A; Itoh, K; Konishi, F; Kumamoto, S; Shimizu, K et al. (2008). "Randomized clinical trial of an ethanol extract of Ganoderma lucidum in men with lower urinary tract symptoms". Asian journal of andrology 10 (5): 777–85. doi:10.1111/j.1745-7262.2008.00361.x. PMID 18097505.
  49. Liu, J; Shiono, J; Shimizu, K; Kukita, A; Kukita, T; Kondo, R (2009). "Ganoderic acid DM: anti-androgenic osteoclastogenesis inhibitor.". Bioorganic & Medicinal Chemistry Letters 19 (8): 2154–7. doi:10.1016/j.bmcl.2009.02.119. PMID 19289282.
  50. Liu, J; Shimizu, K; Konishi, F; Kumamoto, S; Kondo, R (2007). "The anti-androgen effect of ganoderol B isolated from the fruiting body of Ganoderma lucidum.". Bioorganic & Medicinal Chemistry 15 (14): 4966–72. doi:10.1016/j.bmc.2007.04.036. PMID 17499997.
  51. Liu, J; Shimizu, K; Kondo, R (2009). "Anti-androgenic activity of fatty acids.". Chemistry & Biodiversity 6 (4): 503–12. doi:10.1002/cbdv.200800125. PMID 19353546.
  52. Plants for a Future: Angelica koreana
  53. Seo, EK; Kim, KH; Kim, MK; Cho, MH; Choi, E; Kim, K; Mar, W (2002). "Inhibitors of 5alpha -reductase type I in LNCaP cells from the roots of Angelica koreana.". Planta medica 68 (2): 162–3. doi:10.1055/s-2002-20258. PMID 11859469.
  54. Oku, H. Ishiguro K. (2002). "Cyclooxygenase-2 inhibitory 1,4-naphthoquinones from Impatiens balsamina L.". Biological & Pharmaceutical Bulletin 25 (5): 658–60. doi:10.1248/bpb.25.658.
  55. Li, YH; Yang, YF; Li, K; Jin, LL; Yang, NY; Kong, DY (2009). "5 alpha-reductase and aromatase inhibitory constituents from Brassica rapa L. pollen.". Chemical & pharmaceutical bulletin 57 (4): 401–4. doi:10.1248/cpb.57.401. PMID 19336936.
  56. Pandit, S. Chauhan NS. Dixit VK.; Chauhan, N. S.; Dixit, V. K. (2008). "Effect of Cuscuta reflexa Roxb on androgen-induced alopecia". Journal of Cosmetic Dermatology 7 (3): 199–204. doi:10.1111/j.1473-2165.2008.00389.x. PMID 18789055.
  57. Flora of China: Euphorbia jolkinii
  58. Park, SH; Kim, JA; Hua, XG (2005). "Isolation of 5α-reductase inhibitors from Euphorbia jolkinii". Korean Journal of Pharmacognosy 36 (1): 9–16.
  59. Fujita, R. Liu J. Shimizu K. Konishi F. Noda K. Kumamoto S. Ueda C. Tajiri H. Kaneko S. Suimi Y. Kondo R.; Liu, J; Shimizu, K; Konishi, F; Noda, K; Kumamoto, S; Ueda, C; Tajiri, H; Kaneko, S; Suimi, Y; Kondo, R (2005). "Anti-androgenic activities of Ganoderma lucidum". Journal of Ethnopharmacology 102 (1): 107–12. doi:10.1016/j.jep.2005.05.041. PMID 16029938.
  60. Cho, CH; Bae, JS; Kim, YU (2010). "5alpha-reductase inhibitory components as antiandrogens from herbal medicine.". Journal of acupuncture and meridian studies 3 (2): 116–8. doi:10.1016/S2005-2901(10)60021-0. PMID 20633525.
  61. Hirata, N; Tokunaga, M; Naruto, S; Iinuma, M; Matsuda, H (2007). "Testosterone 5alpha-reductase inhibitory active constituents of Piper nigrum leaf.". Biological & Pharmaceutical Bulletin 30 (12): 2402–5. doi:10.1248/bpb.30.2402. PMID 18057734.
  62. Edgar, AD.; Levin, R.; Constantinou, CE.; Denis (2007). "A critical review of the pharmacology of the plant extract of Pygeum africanum in the treatment of LUTS". Neurourology & Urodynamics 26 (4): 458–63. doi:10.1002/nau.20136. PMID 17397059. |first5= missing |last5= in Authors list (help)
  63. Raynaud, JP; Cousse, H; Martin, PM (2002). "Inhibition of type 1 and type 2 5alpha-reductase activity by free fatty acids, active ingredients of Permixon". The Journal of Steroid Biochemistry and Molecular Biology 82 (2–3): 233–9. doi:10.1016/S0960-0760(02)00187-5. PMID 12477490.
  64. Pais, P (2010). "Potency of a novel saw palmetto ethanol extract, SPET-085, for inhibition of 5alpha-reductase II.". Advances in therapy 27 (8): 555–63. doi:10.1007/s12325-010-0041-6. PMID 20623347.
  65. Abe, M; Ito, Y; Oyunzul, L; Oki-Fujino, T; Yamada, S (2009). "Pharmacologically relevant receptor binding characteristics and 5alpha-reductase inhibitory activity of free Fatty acids contained in saw palmetto extract.". Biological & Pharmaceutical Bulletin 32 (4): 646–50. doi:10.1248/bpb.32.646. PMID 19336899.
  66. Roh, SS; Park, MK; Kim, YU (2010). "Abietic acid from Resina Pini of Pinus species as a testosterone 5α-reductase inhibitor". Journal of Health Science 56 (4): 451–455. doi:10.1248/jhs.56.451.
  67. Roh, SS; Kim, CD; Lee, MH; Hwang, SL; Rang, MJ; Yoon, YK (2002). "The hair growth promoting effect of Sophora flavescens extract and its molecular regulation.". Journal of dermatological science 30 (1): 43–9. doi:10.1016/s0923-1811(02)00060-9. PMID 12354419.
  68. Park, WS; Son, ED; Nam, GW; Kim, SH; Noh, MS; Lee, BG; Jang, IS; Kim, SE et al. (2003). "Torilin from Torilis japonica, as a new inhibitor of testosterone 5 alpha-reductase". Planta medica 69 (5): 459–61. doi:10.1055/s-2003-39717. PMID 12802730.
  69. Park, WS; Lee, CH; Lee, BG; Chang, IS (2003). "The extract of Thujae occidentalis semen inhibited 5alpha-reductase and androchronogenetic alopecia of B6CBAF1/j hybrid mouse.". Journal of dermatological science 31 (2): 91–8. doi:10.1016/s0923-1811(02)00146-9. PMID 12670719.
  70. Matsuda H., Yamazaki M., Naruto S., Asanuma Y., Kubo M. "Anti-androgenic and hair growth promoting activities of Lygodii Spora (spore of Lygodium japonicum) I. Active constituents inhibiting testosterone 5α-reductase " Biological and Pharmaceutical Bulletin 2002 25:5 (622-626)
  71. 71.0 71.1 Vahlensieck Jr, W.; Fabricius, P. G.; Hell, U. (1996). "Drug therapy of benign prostatic hyperplasia". Fortschritte der Medizin 114 (31): 407–411. PMID 9036092.
  72. Mantovani, F. (2010). "Serenoa repens in benign prostatic hypertrophy: Analysis of 2 Italian studies". Minerva urologica e nefrologica = the Italian journal of urology and nephrology 62 (4): 335–340. PMID 20944533.
  73. 73.0 73.1 Morán, E.; Budía, A.; Broseta, E.; Boronat, F. (2012). "Fitoterapia en Urología. Evidencia científica actual de su aplicación en hiperplasia benigna de próstata y adenocarcinoma de próstata". Actas Urológicas Españolas 37 (2): 114–119. doi:10.1016/j.acuro.2012.07.005. PMID 23058996.
  74. 74.0 74.1 Hartmann, R. W.; Mark, M.; Soldati, F. (1996). "Inhibition of 5 α-reductase and aromatase by PHL-00801 (Prostatonin®), a combination of PY102 (Pygeum africanum) and UR102 (Urtica dioica) extracts". Phytomedicine 3 (2): 121–128. doi:10.1016/S0944-7113(96)80025-0. PMID 23194959.
  75. Suzuki, Y.; Ito, Y.; Konno, C.; Furuya, T. (1991). "Effects of tissue cultured ginseng on gastric secretion and pepsin activity". Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan 111 (12): 770–774. PMID 1806658.
  76. Yener, Z.; Celik, I.; Ilhan, F.; Bal, R. (2009). "Effects of Urtica dioica L. Seed on lipid peroxidation, antioxidants and liver pathology in aflatoxin-induced tissue injury in rats". Food and Chemical Toxicology 47 (2): 418–424. doi:10.1016/j.fct.2008.11.031. PMID 19073231.
  77. Nahata, A.; Dixit, V. K. (2012). "Ameliorative effects of stinging nettle (Urtica dioica) on testosterone-induced prostatic hyperplasia in rats". Andrologia 44: 396–409. doi:10.1111/j.1439-0272.2011.01197.x. PMID 21806658.
  78. Mekhfi, H.; Haouari, M. E.; Legssyer, A.; Bnouham, M.; Aziz, M.; Atmani, F.; Remmal, A.; Ziyyat, A. (2004). "Platelet anti-aggregant property of some Moroccan medicinal plants". Journal of Ethnopharmacology 94 (2–3): 317–322. doi:10.1016/j.jep.2004.06.005. PMID 15325737.
  79. "General practice study with nettle extract. Arthrosis patient need fewer non-steroidal anti-inflammatory drugs". MMW Fortschritte der Medizin 144 (26): 52. 2002. PMID 12154480.
  80. Quiles, M. T.; Arbós, M. A.; Fraga, A. N.; De Torres, I. S. M.; Reventós, J.; Morote, J. (2010). "Antiproliferative and apoptotic effects of the herbal agent Pygeum africanum on cultured prostate stromal cells from patients with benign prostatic hyperplasia (BPH)". The Prostate 70 (10): 1044–1053. doi:10.1002/pros.21138. PMID 20503393.
  81. Papaioannou, M.; Schleich, S.; Roell, D.; Schubert, U.; Tanner, T.; Claessens, F.; Matusch, R.; Baniahmad, A. (2009). "NBBS isolated from Pygeum africanum bark exhibits androgen antagonistic activity, inhibits AR nuclear translocation and prostate cancer cell growth". Investigational New Drugs 28 (6): 729–743. doi:10.1007/s10637-009-9304-y. PMID 19771394.
  82. Papaioannou, M.; Schleich, S.; Prade, I.; Degen, S.; Roell, D.; Schubert, U.; Tanner, T.; Claessens, F.; Matusch, R.; Baniahmad, A. (2009). "The natural compound atraric acid is an antagonist of the human androgen receptor inhibiting cellular invasiveness and prostate cancer cell growth". Journal of Cellular and Molecular Medicine 13 (8b): 2210–2223. doi:10.1111/j.1582-4934.2008.00426.x. PMID 18627423.
  83. Kanaley, J. A. (2008). "Growth hormone, arginine and exercise". Current Opinion in Clinical Nutrition and Metabolic Care 11 (1): 50–54. doi:10.1097/MCO.0b013e3282f2b0ad. PMID 18090659.
  84. Rogers, G. E.; Rothnagel, J. A. (1983). "A sensitive assay for the enzyme activity in hair follicles and epidermis that catalyses the peptidyl-arginine-citrulline post-translational modification". Current problems in dermatology 11: 171–184. PMID 6653155.
  85. Collier, S. R.; Collins, E.; Kanaley, J. A. (2006). "Oral arginine attenuates the growth hormone response to resistance exercise". Journal of Applied Physiology 101 (3): 848–852. doi:10.1152/japplphysiol.00285.2006. PMID 16741262.
  86. Wolf, R.; Schönfelder, G.; Paul, M.; Blume-Peytavi, U. (2003). "Nitric oxide in the human hair follicle: Constitutive and dihydrotestosterone-induced nitric oxide synthase expression and NO production in dermal papilla cells". Journal of molecular medicine (Berlin, Germany) 81 (2): 110–117. doi:10.1007/s00109-002-0402-y. PMID 12601527.
  87. Inui, S.; Itami, S. (2012). "Androgen actions on the human hair follicle: Perspectives". Experimental Dermatology 22 (3): 168–71. doi:10.1111/exd.12024. PMID 23016593.
  88. Rajendiran, A.; Sampath, S. (2011). "Biotinidase deficiency - clinching the diagnosis rapidly can make all the difference!". Case Reports 2011: bcr0720114494. doi:10.1136/bcr.07.2011.4494. PMID 22679321.
  89. Daniells, S.; Hardy, G. (2010). "Hair loss in long-term or home parenteral nutrition: Are micronutrient deficiencies to blame?". Current Opinion in Clinical Nutrition and Metabolic Care 13 (6): 690–697. doi:10.1097/MCO.0b013e32833ece02. PMID 20823774.
  90. Yazbeck, N.; Muwakkit, S.; Abboud, M.; Saab, R. (2010). "Zinc and biotin deficiencies after pancreaticoduodenectomy". Acta gastro-enterologica Belgica 73 (2): 283–286. PMID 20690572.
  91. Ananth, N.; Praveen Kumar, G. S. (2003). "Biotinidase deficiency—Diagnosis by enzyme assay and a follow-up study". Indian Journal of Clinical Biochemistry 18 (2): 23–26. doi:10.1007/BF02867363. PMC 3453880. PMID 23105388.
  92. Wolf, B.; Pagon, R. A.; Bird, T. D.; Dolan, C. R.; Stephens, K.; Adam, M. P. (1993). "Biotinidase Deficiency". PMID 20301497.
  93. Adams Jr, W. P.; Griffin, J. R.; Friedman, R. M.; Rohrich, R. J.; Robinson Jr, J. B. (1998). "The myoadipose flap: A new composite". Plastic and reconstructive surgery 102 (3): 735–740. doi:10.1097/00006534-199809030-00018. PMID 9727438.
  94. Boccaletti, V.; Zendri, E.; Giordano, G.; Gnetti, L.; De Panfilis, G. (2007). "Familial Uncombable Hair Syndrome: Ultrastructural Hair Study and Response to Biotin". Pediatric Dermatology 24 (3): E14–E16. doi:10.1111/j.1525-1470.2007.00385.x. PMID 17509110.
  95. Fujimoto, W.; Inaoki, M.; Fukui, T.; Inoue, Y.; Kuhara, T. (2005). "Biotin deficiency in an infant fed with amino acid formula". The Journal of dermatology 32 (4): 256–261. PMID 15863846.
  96. White, J. P.; Urban, L.; Nagy, I. (2011). "TRPV1 function in health and disease". Current pharmaceutical biotechnology 12 (1): 130–144. doi:10.2174/138920111793937844. PMID 20932253.
  97. Paus, R.; Heinzelmann, T.; Schultz, K. D.; Furkert, J.; Fechner, K.; Czarnetzki, B. M. (1994). "Hair growth induction by substance P". Laboratory investigation; a journal of technical methods and pathology 71 (1): 134–140. PMID 7518880.
  98. Shortland, P.; Molander, C.; Woolf, C. J.; Fitzgerald, M. (1990). "Neonatal capsaicin treatment induces invasion of the substantia gelatinosa by the terminal arborizations of hair follicle afferents in the rat dorsal horn". The Journal of Comparative Neurology 296 (1): 23–31. doi:10.1002/cne.902960103. PMID 2358528.
  99. Baranowski, R.; Lynn, B. (1985). "Receptive field size of hair follicle afferents in rats treated neonatally with capsaicin". Brain research 338 (2): 395–397. doi:10.1016/0006-8993(85)90177-5. PMID 4027607.
  100. Harada, N.; Okajima, K.; Narimatsu, N.; Kurihara, H.; Nakagata, N. (2008). "Effect of topical application of raspberry ketone on dermal production of insulin-like growth factor-I in mice and on hair growth and skin elasticity in humans". Growth Hormone & IGF Research 18 (4): 335–344. doi:10.1016/j.ghir.2008.01.005. PMID 18321745.
  101. Martínez-Martínez, E.; Galván-Hernández, C. I.; Toscano-Márquez, B.; Gutiérrez-Ospina, G. (2012). Rojas, Mauricio, ed. "Modulatory Role of Sensory Innervation on Hair Follicle Stem Cell Progeny during Wound Healing of the Rat Skin". PLoS ONE 7 (5): e36421. doi:10.1371/journal.pone.0036421. PMC 3344885. PMID 22574159.
  102. Bodó, E.; Bíró, T. S.; Telek, A.; Czifra, G.; Griger, Z. N.; Tóth, B. Z. I.; Mescalchin, A.; Ito, T.; Bettermann, A.; Kovács, L. S.; Paus, R. (2005). "A Hot New Twist to Hair Biology". The American Journal of Pathology 166 (4): 985–998. doi:10.1016/S0002-9440(10)62320-6. PMC 1602392. PMID 15793280.
  103. Tóth, B. Z. I.; Géczy, T. S.; Griger, Z. N.; Dózsa, A.; Seltmann, H.; Kovács, L. S.; Nagy, L. S.; Zouboulis, C. C.; Paus, R.; Bíró, T. S. (2008). "Transient Receptor Potential Vanilloid-1 Signaling as a Regulator of Human Sebocyte Biology". Journal of Investigative Dermatology 129 (2): 329–339. doi:10.1038/jid.2008.258. PMID 18769453.
  104. Ohkawara, S.; Tanaka-Kagawa, T.; Furukawa, Y.; Nishimura, T.; Jinno, H. (2010). "Activation of the human transient receptor potential vanilloid subtype 1 by essential oils". Biological & pharmaceutical bulletin 33 (8): 1434–1437. doi:10.1248/bpb.33.1434. PMID 20686244.
  105. Tyler, Richard (January 9, 2011). "Thomas Whitfield's German roots help hair loss product launch". The Daily Telegraph (London). Retrieved July 23, 2012.
  106. Edwards, Jim (January 12, 2011). "Pharma's 4 Best Shots at a Cure for Baldness" (Web). CBSNews.com. CBS News. Retrieved August 1, 2012. it's actually just another dietary supplement and as such is not approved by the FDA.
  107. "Minoxidil Alternatives" (Web). MPB Research. Retrieved August 1, 2012.
  108. Horie, S. (2012). "Chemoprevention of Prostate Cancer: Soy Isoflavones and Curcumin". Korean Journal of Urology 53 (10): 665–672. doi:10.4111/kju.2012.53.10.665. PMC 3490085. PMID 23136625.
  109. Tsui, K. -H.; Feng, T. -H.; Lin, C. -M.; Chang, P. -L.; Juang, H. -H. (2008). "Curcumin Blocks the Activation of Androgen and Interlukin-6 on Prostate-Specific Antigen Expression in Human Prostatic Carcinoma Cells". Journal of Andrology 29 (6): 661–668. doi:10.2164/jandrol.108.004911. PMID 18676361.
  110. Chung, L. C.; Tsui, K. H.; Feng, T. H.; Lee, S. L.; Chang, P. L.; Juang, H. H. (2011). "Curcumin provides potential protection against the activation of hypoxia and prolyl 4-hydroxylase inhibitors on prostate-specific antigen expression in human prostate carcinoma cells". Molecular Nutrition & Food Research 55 (11): 1666–1676. doi:10.1002/mnfr.201100328. PMID 21936051.
  111. Huh, S.; Lee, J.; Jung, E.; Kim, S. C.; Kang, J. I.; Lee, J.; Kim, Y. W.; Sung, Y. K.; Kang, H. K.; Park, D. (2009). "A cell-based system for screening hair growth-promoting agents". Archives of Dermatological Research 301 (5): 381–385. doi:10.1007/s00403-009-0931-0. PMID 19277688.
  112. Haussler, M. R.; Whitfield, G. K.; Kaneko, I.; Haussler, C. A.; Hsieh, D.; Hsieh, J. C.; Jurutka, P. W. (2012). "Molecular Mechanisms of Vitamin D Action". Calcified Tissue International 92 (2): 77–98. doi:10.1007/s00223-012-9619-0. PMID 22782502.
  113. Singhal, S. S.; Awasthi, S.; Pandya, U.; Piper, J. T.; Saini, M. K.; Cheng, J. Z.; Awasthi, Y. C. (1999). "The effect of curcumin on glutathione-linked enzymes in K562 human leukemia cells". Toxicology letters 109 (1–2): 87–95. PMID 10514034.
  114. Shi, Q.; Wada, K.; Ohkoshi, E.; Lin, L.; Huang, R.; Morris-Natschke, S. L.; Goto, M.; Lee, K. H. (2012). "Antitumor agents 290. Design, synthesis, and biological evaluation of new LNCaP and PC-3 cytotoxic curcumin analogs conjugated with anti-androgens". Bioorganic & Medicinal Chemistry 20 (13): 4020–4031. doi:10.1016/j.bmc.2012.05.011. PMC 3376200. PMID 22672984.
  115. Xu, G.; Chu, Y.; Jiang, N.; Yang, J.; Li, F. (2012). "The Three Dimensional Quantitative Structure Activity Relationships (3D-QSAR) and Docking Studies of Curcumin Derivatives as Androgen Receptor Antagonists". International Journal of Molecular Sciences 13 (5): 6138–6155. doi:10.3390/ijms13056138. PMC 3382773. PMID 22754355.
  116. Adam, V.; Ekblad, M.; Sweeney, K.; Müller, H.; Busch, K. H. N.; Johnsen, C. T. R.; Kang, N. R.; Lemoine, N. R.; Halldén, G. (2012). "Synergistic and Selective Cancer Cell Killing Mediated by the Oncolytic Adenoviral Mutant AdΔΔ and Dietary Phytochemicals in Prostate Cancer Models". Human Gene Therapy 23 (9): 1003–1015. doi:10.1089/hum.2012.046. PMC 3440020. PMID 22788991.
  117. Ide, H.; Tokiwa, S.; Sakamaki, K.; Nishio, K.; Isotani, S.; Muto, S.; Hama, T.; Masuda, H.; Horie, S. (2010). "Combined inhibitory effects of soy isoflavones and curcumin on the production of prostate-specific antigen". The Prostate 70 (10): 1127–1133. doi:10.1002/pros.21147. PMID 20503397.
  118. Shi, Q.; Shih, C. C.; Lee, K. H. (2009). "Novel anti-prostate cancer curcumin analogues that enhance androgen receptor degradation activity". Anti-cancer agents in medicinal chemistry 9 (8): 904–912. doi:10.2174/187152009789124655. PMID 19663790.
  119. Nakamura, K.; Yasunaga, Y.; Segawa, T.; Ko, D.; Moul, J. W.; Srivastava, S.; Rhim, J. S. (2002). "Curcumin down-regulates AR gene expression and activation in prostate cancer cell lines". International journal of oncology 21 (4): 825–830. doi:10.3892/ijo.21.4.825. PMID 12239622.
  120. Hour, T. C.; Chen, J.; Huang, C. Y.; Guan, J. Y.; Lu, S. H.; Pu, Y. S. (2002). "Curcumin enhances cytotoxicity of chemotherapeutic agents in prostate cancer cells by inducing p21WAF1/CIP1 and C/EBP? Expressions and suppressing NF-?B activation". The Prostate 51 (3): 211–218. doi:10.1002/pros.10089. PMID 11967955.
  121. Rakel D. (2007). "Ch. 57". Integrative Medicine (2nd ed.). Saunders.
  122. Gong Y. Sohn H. Xue L. Firestone GL. Bjeldanes LF (2006). "3,3'-Diindolylmethane is a novel mitochondrial H(+)-ATP synthase inhibitor that can induce p21(Cip1/Waf1) expression by induction of oxidative stress in human breast cancer cells". Cancer Research 66 (9): 4880–4887. doi:10.1158/0008-5472.CAN-05-4162. PMID 16651444.
  123. Acharya A. Das I. Singh S. Saha T. (2010). "Chemopreventive properties of indole-3-carbinol, diindolylmethane and other constituents of cardamom against carcinogenesis". Recent patents on food, nutrition & agriculture 2 (2): 166–177. doi:10.2174/1876142911002020166.
  124. Li, Y.; Kong, D.; Wang, Z.; Ahmad, A.; Bao, B.; Padhye, S.; Sarkar, F. H. (2011). "Inactivation of AR/TMPRSS2-ERG/Wnt Signaling Networks Attenuates the Aggressive Behavior of Prostate Cancer Cells". Cancer Prevention Research 4 (9): 1495–1506. doi:10.1158/1940-6207.CAPR-11-0077. PMC 3167947. PMID 21680704.
  125. Diederich, M. H.; Gaascht, F.; Cronauer, M.; Henry, E.; Dicato, M.; Diederich, M. (2011). "Anti-proliferative potential of curcumin in androgen-dependent prostate cancer cells occurs through modulation of the Wingless signaling pathway". International Journal of Oncology 38 (3): 603–611. doi:10.3892/ijo.2011.905. PMID 21240460.
  126. Whitehouse, M. W.; Turner, A. G.; Davis, C. K. C.; Roberts, M. S. (1998). "Emu oil(s): A source of non-toxic transdermal anti-inflammatory agents in aboriginal medicine". Inflammopharmacology 6 (1): 1–8. doi:10.1007/s10787-998-0001-9. PMID 17638122.
  127. Beckerbauer, L. M.; Thiel-Cooper, R.; Ahn, D. U.; Sell, J. L.; Parrish Jr, F. C.; Beitz, D. C. (2001). "Influence of two dietary fats on the composition of emu oil and meat". Poultry science 80 (2): 187–194. doi:10.1093/ps/80.2.187. PMID 11233007.
  128. Qiu, X. W.; Wang, J. H.; Fang, X. W.; Gong, Z. Y.; Li, Z. Q.; Yi, Z. H. (2005). "Anti-inflammatory activity and healing-promoting effects of topical application of emu oil on wound in scalded rats". Di 1 jun yi da xue xue bao = Academic journal of the first medical college of PLA 25 (4): 407–410. PMID 15837639.
  129. Zemtsov, A.; Gaddis, M.; Montalvo-Lugo, V. M. (1996). "Moisturizing and cosmetic properties of emu oil: A pilot double blind study". The Australasian journal of dermatology 37 (3): 159–161. doi:10.1111/j.1440-0960.1996.tb01040.x. PMID 8771875.
  130. Janssen, P. L.; Meyboom, S.; Van Staveren, W. A.; De Vegt, F.; Katan, M. B. (1996). "Consumption of ginger (Zingiber officinale roscoe) does not affect ex vivo platelet thromboxane production in humans". European journal of clinical nutrition 50 (11): 772–774. PMID 8933126.
  131. Han, A. R.; Kim, M. S.; Jeong, Y. H.; Lee, S. K.; Seo, E. K. (2005). "Cyclooxygenase-2 inhibitory phenylbutenoids from the rhizomes of Zingiber cassumunar". Chemical & pharmaceutical bulletin 53 (11): 1466–1468. doi:10.1248/cpb.53.1466. PMID 16272734.
  132. Zick, S. M.; Turgeon, D. K.; Vareed, S. K.; Ruffin, M. T.; Litzinger, A. J.; Wright, B. D.; Alrawi, S.; Normolle, D. P.; Djuric, Z.; Brenner, D. E. (2011). "Phase II Study of the Effects of Ginger Root Extract on Eicosanoids in Colon Mucosa in People at Normal Risk for Colorectal Cancer". Cancer Prevention Research 4 (11): 1929–1937. doi:10.1158/1940-6207.CAPR-11-0224. PMC 3208778. PMID 21990307.
  133. Murakami, A.; Takahashi, D.; Kinoshita, T.; Koshimizu, K.; Kim, H. W.; Yoshihiro, A.; Nakamura, Y.; Jiwajinda, S.; Terao, J.; Ohigashi, H. (2002). "Zerumbone, a Southeast Asian ginger sesquiterpene, markedly suppresses free radical generation, proinflammatory protein production, and cancer cell proliferation accompanied by apoptosis: The alpha,beta-unsaturated carbonyl group is a prerequisite". Carcinogenesis 23 (5): 795–802. doi:10.1093/carcin/23.5.795. PMID 12016152.
  134. Guahk, G. H.; Ha, S. K.; Jung, H. S.; Kang, C.; Kim, C. H.; Kim, Y. B.; Kim, S. Y. (2010). "Zingiber officinaleProtects HaCaT cells and C57BL/6 Mice from Ultraviolet B-Induced Inflammation". Journal of Medicinal Food 13 (3): 673–680. doi:10.1089/jmf.2009.1239. PMID 20521990.
  135. Takahashi, T.; Kamiya, T.; Hasegawa, A.; Yokoo, Y. (1999). "Procyanidin Oligomers Selectively and Intensively Promote Proliferation of Mouse Hair Epithelial Cells in Vitro and Activate Hair Follicle Growth in Vivo1". Journal of Investigative Dermatology 112 (3): 310–316. doi:10.1046/j.1523-1747.1999.00532.x. PMID 10084307.
  136. Takahashi, T.; Kamiya, T.; Yokoo, Y. (1998). "Proanthocyanidins from grape seeds promote proliferation of mouse hair follicle cells in vitro and convert hair cycle in vivo". Acta dermato-venereologica 78 (6): 428–432. doi:10.1080/000155598442719. PMID 9833041.
  137. Cox, C. E.; Gentry, L. O.; Rodriguez-Gomez, G. (1992). "Multicenter open-label study of parenteral ofloxacin in treatment of pyelonephritis in adults". Urology 39 (5): 453–456. doi:10.1016/0090-4295(92)90246-s. PMID 1580038.
  138. Kang II, J., Kim, S.-C., Han, S.-C., Hong, H.-J., Jeon, Y.-J., Kim, B., Koh, Y.-S., Yoo, E.-S., Kang, H.-K. Hair-loss preventing effect of Grateloupia elliptica (2012) Biomolecules and Therapeutics, 20(1), pp. 118–120.
  139. Nguyen, H., Kim, S.M. (2012). Antioxidative, anticholinesterase and antityrosinase activities of the red alga Grateloupia lancifolia extracts. African Journal of Biotechnology, 11(39), pp. 9457–9467 (May 15). Retrieved on 2012-06-14.