Oxytocin

Oxytocin
Pronunciation /ˌɒksɪˈtoʊsɪn/
Physiological data
Source tissues pituitary gland
Target tissues wide spread
Receptors oxytocin receptor
Antagonists atosiban
Precursor oxytocin/neurophysin I prepropeptide
Metabolism liver and other oxytocinases
Pharmacokinetic data
Protein binding 30%
Metabolism liver and other oxytocinases
Biological half-life 1–6 min (IV)
~2 h (intranasal)[1][2]
Excretion Biliary and kidney
Identifiers
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
ECHA InfoCard 100.000.045
Chemical and physical data
Formula C43H66N12O12S2
Molar mass 1007.19 g/mol
3D model (JSmol)
  (verify)

Oxytocin (Oxt; /ˌɒksɪˈtoʊsɪn/, /ˌɒksi-/) is a peptide hormone and neuropeptide. Oxytocin is normally produced by the paraventricular nucleus of the hypothalamus and released by the posterior pituitary.[3] It plays a role in social bonding, sexual reproduction in both sexes, and during and after childbirth.[4] Oxytocin is released into the bloodstream as a hormone in response to stretching of the cervix and uterus during labor and with stimulation of the nipples from breastfeeding.[5] This helps with birth, bonding with the baby, and milk production.[5][6] Oxytocin was discovered by Henry Dale in 1906.[7] Its molecular structure was discovered in 1952.[8] Oxytocin is also used as a medication to facilitate childbirth.[9][10][11]

Biochemistry

OXT
Identifiers
AliasesOXT, OT, OT-NPI, OXT-NPI, oxytocin/neurophysin I prepropeptide
External IDsOMIM: 167050 MGI: 97453 HomoloGene: 55494 GeneCards: OXT
Gene location (Human)
Chr.Chromosome 20 (human)[12]
BandNo data availableStart3,071,620 bp[12]
End3,072,517 bp[12]
Orthologs
SpeciesHumanMouse
Entrez

5020

18429

Ensembl

ENSG00000101405

ENSMUSG00000027301

UniProt

P01178

P35454

RefSeq (mRNA)

NM_000915

NM_011025

RefSeq (protein)

NP_000906

NP_035155

Location (UCSC)Chr 20: 3.07 – 3.07 MbChr 20: 130.58 – 130.58 Mb
PubMed search[14][15]
Wikidata
View/Edit HumanView/Edit Mouse

Estrogen has been found to increase the secretion of oxytocin and to increase the expression of its receptor, the oxytocin receptor, in the brain.[16] In women, a single dose of estradiol has been found to be sufficient to increase circulating oxytocin concentrations.[17]

Biosynthesis

The oxytocin peptide is synthesized as an inactive precursor protein from the OXT gene.[18][19][20] This precursor protein also includes the oxytocin carrier protein neurophysin I.[21] The inactive precursor protein is progressively hydrolyzed into smaller fragments (one of which is neurophysin I) via a series of enzymes. The last hydrolysis that releases the active oxytocin nonapeptide is catalyzed by peptidylglycine alpha-amidating monooxygenase (PAM).[22]

The activity of the PAM enzyme system is dependent upon vitamin C (ascorbate), which is a necessary vitamin cofactor. By chance, sodium ascorbate by itself was found to stimulate the production of oxytocin from ovarian tissue over a range of concentrations in a dose-dependent manner.[23] Many of the same tissues (e.g. ovaries, testes, eyes, adrenals, placenta, thymus, pancreas) where PAM (and oxytocin by default) is found are also known to store higher concentrations of vitamin C.[24]

Oxytocin is known to be metabolized by the oxytocinase, leucyl/cystinyl aminopeptidase.[25][26] Other oxytocinases are also known to exist.[25][27] Amastatin, bestatin (ubenimex), leupeptin, and puromycin have been found to inhibit the enzymatic degradation of oxytocin, though they also inhibit the degradation of various other peptides, such as vasopressin, met-enkephalin, and dynorphin A.[27][28][29][30]

Neural sources

In the hypothalamus, oxytocin is made in magnocellular neurosecretory cells of the supraoptic and paraventricular nuclei, and is stored in Herring bodies at the axon terminals in the posterior pituitary. It is then released into the blood from the posterior lobe (neurohypophysis) of the pituitary gland. These axons (likely, but dendrites have not been ruled out) have collaterals that innervate neurons in the nucleus accumbens, a brain structure where oxytocin receptors are expressed.[31] The endocrine effects of hormonal oxytocin and the cognitive or behavioral effects of oxytocin neuropeptides are thought to be coordinated through its common release through these collaterals.[31] Oxytocin is also produced by some neurons in the paraventricular nucleus that project to other parts of the brain and to the spinal cord.[32] Depending on the species, oxytocin receptor-expressing cells are located in other areas, including the amygdala and bed nucleus of the stria terminalis.

In the pituitary gland, oxytocin is packaged in large, dense-core vesicles, where it is bound to neurophysin I as shown in the inset of the figure; neurophysin is a large peptide fragment of the larger precursor protein molecule from which oxytocin is derived by enzymatic cleavage.

Secretion of oxytocin from the neurosecretory nerve endings is regulated by the electrical activity of the oxytocin cells in the hypothalamus. These cells generate action potentials that propagate down axons to the nerve endings in the pituitary; the endings contain large numbers of oxytocin-containing vesicles, which are released by exocytosis when the nerve terminals are depolarised.

Non-neural sources

Endogenous oxytocin concentrations in the brain have been found to be as much as 1000-fold higher than peripheral levels.[33]

Outside the brain, oxytocin-containing cells have been identified in several diverse tissues, including in females in the corpus luteum [34][35] and the placenta,[36] in males in the testicles' interstitial cells of Leydig,[37] the retina,[38] the adrenal medulla,[39] the thymus[40] and the pancreas.[41] The finding of significant amounts of this classically "neurohypophysial" hormone outside the central nervous system raises many questions regarding its possible importance in these different tissues.

Male

The Leydig cells in some species have been shown to possess the biosynthetic machinery to manufacture testicular oxytocin de novo, to be specific, in rats (which can synthesize vitamin C endogenously), and in guinea pigs, which, like humans, require an exogenous source of vitamin C (ascorbate) in their diets.[42]

Female

Oxytocin is synthesized by corpora lutea of several species, including ruminants and primates. Along with estrogen, it is involved in inducing the endometrial synthesis of prostaglandin F2α to cause regression of the corpus luteum.

Evolution

Virtually all vertebrates have an oxytocin-like nonapeptide hormone that supports reproductive functions and a vasopressin-like nonapeptide hormone involved in water regulation. The two genes are usually located close to each other (less than 15,000 bases apart) on the same chromosome, and are transcribed in opposite directions (however, in fugu,[43] the homologs are further apart and transcribed in the same direction).

The two genes are believed to result from a gene duplication event; the ancestral gene is estimated to be about 500 million years old and is found in cyclostomata (modern members of the Agnatha).[44]

Biological function

Oxytocin has peripheral (hormonal) actions, and also has actions in the brain. Its actions are mediated by specific, oxytocin receptors. The oxytocin receptor is a G-protein-coupled receptor that requires magnesium and cholesterol. It belongs to the rhodopsin-type (class I) group of G-protein-coupled receptors.

Studies have looked at oxytocin's role in various behaviors, including orgasm, social recognition, pair bonding, anxiety, and maternal behaviors.[45]

Physiological

The peripheral actions of oxytocin mainly reflect secretion from the pituitary gland. The behavioral effects of oxytocin are thought to reflect release from centrally projecting oxytocin neurons, different from those that project to the pituitary gland, or that are collaterals from them.[31] Oxytocin receptors are expressed by neurons in many parts of the brain and spinal cord, including the amygdala, ventromedial hypothalamus, septum, nucleus accumbens, and brainstem.

Psychological

Bonding

In the prairie vole, oxytocin released into the brain of the female during sexual activity is important for forming a monogamous pair bond with her sexual partner. Vasopressin appears to have a similar effect in males.[56] Oxytocin has a role in social behaviors in many species, so it likely also does in humans. In a 2003 study, both humans and dog oxytocin levels in the blood rose after five to 24 minutes of a petting session. This possibly plays a role in the emotional bonding between humans and dogs.[57]

Drugs

Fear and anxiety

Oxytocin is typically remembered for the effect it has on prosocial behaviors, such as its role in facilitating trust and attachment between individuals. Consequently, oxytocin is often referred to as the “love hormone".[72] However, oxytocin has a more complex role than solely enhancing prosocial behaviors. There is consensus that oxytocin modulates fear and anxiety; that is, it does not directly elicit fear or anxiety.[73] Two dominant theories explain the role of oxytocin in fear and anxiety. One theory states that oxytocin increases approach/avoidance to certain social stimuli and the second theory states that oxytocin increases the salience of certain social stimuli, causing the animal or human to pay closer attention to socially relevant stimuli.[74]

Nasally administered oxytocin has been reported to reduce fear, possibly by inhibiting the amygdala (which is thought to be responsible for fear responses).[75] Indeed, studies in rodents have shown oxytocin can efficiently inhibit fear responses by activating an inhibitory circuit within the amygdala.[76][77] Some researchers have argued oxytocin has a general enhancing effect on all social emotions, since intranasal administration of oxytocin also increases envy and Schadenfreude.[78] Individuals who receive an intranasal dose of oxytocin identify facial expressions of disgust faster than individuals who do not receive oxytocin.[74] Facial expressions of disgust are evolutionarily linked to the idea of contagion. Thus, oxytocin increases the salience of cues that imply contamination, which leads to a faster response because these cues are especially relevant for survival. In another study, after administration of oxytocin, individuals displayed an enhanced ability to recognize expressions of fear compared to the individuals who received the placebo.[79] Oxytocin modulates fear responses by enhancing the maintenance of social memories. Rats that are genetically modified to have a surplus of oxytocin receptors display a greater fear response to a previously conditioned stressor. Oxytocin enhances the aversive social memory, leading the rat to display a greater fear response when the aversive stimulus is encountered again.[73]

Mood and depression

Oxytocin produces antidepressant-like effects in animal models of depression,[80] and a deficit of it may be involved in the pathophysiology of depression in humans.[81] The antidepressant-like effects of oxytocin are not blocked by a selective antagonist of the oxytocin receptor, suggesting that these effects are not mediated by the oxytocin receptor.[17] In accordance, unlike oxytocin, the selective non-peptide oxytocin receptor agonist WAY-267,464 does not produce antidepressant-like effects, at least in the tail suspension test.[82] In contrast to WAY-267,464, carbetocin, a close analogue of oxytocin and peptide oxytocin receptor agonist, notably does produce antidepressant-like effects in animals.[82] As such, the antidepressant-like effects of oxytocin may be mediated by modulation of a different target, perhaps the vasopressin V1A receptor where oxytocin is known to weakly bind as an agonist.[83][84]

Sildenafil has been found to enhance electrically evoked oxytocin release from the pituitary gland.[80] In accordance, the drug shows oxytocin-dependent antidepressant-like effects in animals, and it has proposed that sildenafil may hold promise as a potential antidepressant in humans.[80]

Sex differences

It has been shown that oxytocin differentially affects males and females. Females who are administered oxytocin are overall faster in responding to socially relevant stimuli than males who received oxytocin.[74][85] Additionally, after the administration of oxytocin, females show increased amygdala activity in response to threatening scenes; however, males do not show increased amygdala activation. This phenomenon can be explained by looking at the role of gonadal hormones, specifically estrogen, which modulate the enhanced threat processing seen in females. Estrogen has been shown to stimulate the release of oxytocin from the hypothalamus and promote receptor binding in the amygdala.[85]

It has also been shown that testosterone directly suppresses oxytocin in mice.[86] This has been hypothesized to have evolutionary significance. With oxytocin suppressed, activities such as hunting and attacking invaders would be less mentally difficult as oxytocin is strongly associated with empathy.[87]

Social

In a study measuring oxytocin serum levels in women before and after sexual stimulation, the author suggests it serves an important role in sexual arousal. This study found genital tract stimulation resulted in increased oxytocin immediately after orgasm.[103] Another study reported increases of oxytocin during sexual arousal could be in response to nipple/areola, genital, and/or genital tract stimulation as confirmed in other mammals.[104] Murphy et al. (1987), studying men, found oxytocin levels were raised throughout sexual arousal with no acute increase at orgasm.[105] A more recent study of men found an increase in plasma oxytocin immediately after orgasm, but only in a portion of their sample that did not reach statistical significance. The authors noted these changes "may simply reflect contractile properties on reproductive tissue".[106]

Chemistry

Oxytocin (ball-and-stick) bound to its carrier protein neurophysin (ribbons)

Oxytocin is a peptide of nine amino acids (a nonapeptide) in the sequence cysteine-tyrosine-isoleucine-glutamine-asparagine-cysteine-proline-leucine-glycine-amide (Cys – Tyr – Ile – Gln – Asn – Cys – Pro – Leu – Gly – NH2, or CYIQNCPLG-NH2); its C-terminus has been converted to a primary amide and a disulfide bridge joins the cysteine moieties.[113] Oxytocin has a molecular mass of 1007 Da, and one international unit (IU) of oxytocin is the equivalent of about 2 μg of pure peptide.

While the structure of oxytocin is highly conserved in placental mammals, a novel structure of oxytocin was recently reported in marmosets, tamarins, and other new world primates. Genomic sequencing of the gene for oxytocin revealed a single in-frame mutation (thymine for cytosine) which results in a single amino acid substitution at the 8-position (proline for leucine).[114] Since this original Lee et al. paper, two other laboratories have confirmed Pro8-OT and documented additional oxytocin structural variants in this primate taxon. Vargas-Pinilla et al. sequenced the coding regions of the OXT gene in other genera in new world primates and identified the following variants in addition to Leu8- and Pro8-OT: Ala8-OT, Thr8-OT, and Val3/Pro8-OT.[115] Ren et al. identified a variant further, Phe2-OT in howler monkeys.[116]

The biologically active form of oxytocin, commonly measured by RIA and/or HPLC techniques, is also known as the octapeptide "oxytocin disulfide" (oxidized form), but oxytocin also exists as a reduced straight-chain (non-cyclic) dithiol nonapeptide called oxytoceine.[117] It has been theorized that oxytoceine may act as a free radical scavenger, as donating an electron to a free radical allows oxytoceine to be re-oxidized to oxytocin via the dehydroascorbate / ascorbate redox couple.[118]

The structure of oxytocin is very similar to that of vasopressin. Both are nonapeptides with a single disulfide bridge, differing only by two substitutions in the amino acid sequence (differences from oxytocin bolded for clarity): Cys – Tyr – Phe – Gln – Asn – Cys – Pro – Arg – Gly – NH2.[113] A table showing the sequences of members of the vasopressin/oxytocin superfamily and the species expressing them is present in the vasopressin article. Oxytocin and vasopressin were isolated and their total synthesis reported in 1954,[119] work for which Vincent du Vigneaud was awarded the 1955 Nobel Prize in Chemistry with the citation: "for his work on biochemically important sulphur compounds, especially for the first synthesis of a polypeptide hormone."[120]

Oxytocin and vasopressin are the only known hormones released by the human posterior pituitary gland to act at a distance. However, oxytocin neurons make other peptides, including corticotropin-releasing hormone and dynorphin, for example, that act locally. The magnocellular neurosecretory cells that make oxytocin are adjacent to magnocellular neurosecretory cells that make vasopressin. These are large neuroendocrine neurons which are excitable and can generate action potentials.[121]

History

The word oxytocin was coined from the term oxytocic. Greek ὀξύς, oxys, and τόκος, tokos, meaning "quick birth")

Its uterine-contracting properties were discovered by British pharmacologist Sir Henry Hallett Dale in 1906.[122][45] And its milk ejection property was described by Ott and Scott in 1910[123] and by Schafer and Mackenzie in 1911.[124]

Oxytocin became the first polypeptide hormone to be sequenced[125] or synthesized.[126][127][128] Du Vigneaud was awarded the Nobel Prize in 1955 for his work.[129]

References

  1. ↑ Weisman O, Zagoory-Sharon O, Feldman R (September 2012). "Intranasal oxytocin administration is reflected in human saliva". Psychoneuroendocrinology. 37 (9): 1582–6. PMID 22436536. doi:10.1016/j.psyneuen.2012.02.014.
  2. ↑ Huffmeijer R, Alink LR, Tops M, Grewen KM, Light KC, Bakermans-Kranenburg MJ, Ijzendoorn MH (2012). "Salivary levels of oxytocin remain elevated for more than two hours after intranasal oxytocin administration". Neuro Endocrinology Letters. 33 (1): 21–5. PMID 22467107.
  3. ↑ Gray's Anatomy: The Anatomical Basis of Clinical Practice (41 ed.). Elsevier Health Sciences. 2015. p. 358. ISBN 978-0-7020-6851-5.
  4. ↑ Yang HP, Wang L, Han L, Wang SC (2013). "Nonsocial functions of hypothalamic oxytocin". ISRN Neuroscience. 2013: 179272. PMC 4045544 Freely accessible. PMID 24967304. doi:10.1155/2013/179272.
  5. 1 2 Chiras DD (2012). Human Biology (7th ed.). Sudbury, MA: Jones & Bartlett Learning. p. 262. ISBN 978-0-7637-8345-7.
  6. ↑ Human Evolutionary Biology. Cambridge University Press. 2010. p. 282. ISBN 978-1-139-78900-4.
  7. ↑ Dale, Henry (1906). "On some physiological actions of ergot". The Journal of Physiology. 34 (3): 163–206. PMC 1465771 Freely accessible. PMID 16992821. doi:10.1113/jphysiol.1906.sp001148. Retrieved 2 February 2017.
  8. ↑ Corey E (2012). "Oxytocin". Molecules and Medicine. John Wiley & Sons. ISBN 978-1-118-36173-3.
  9. ↑ "Oxytocin: Summary". IUPHAR/BPS guide to pharmacology. International Union of Basic and Clinical Pharmacology. Retrieved 14 December 2016. Endogenous oxytocin is a hormone and neuropeptide, which plays a role in social bonding, sexual reproduction and is required during and after childbirth. Purified oxytocin is used clinically.
  10. ↑ "Oxytocin". The American Society of Health-System Pharmacists. Retrieved 1 June 2015.
  11. ↑ The Oxford Handbook of Prosocial Behavior. Oxford University Press. 2015. p. 354. ISBN 978-0-19-539981-3.
  12. 1 2 3 GRCh38: Ensembl release 89: ENSG00000101405 - Ensembl, May 2017
  13. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000027301 - Ensembl, May 2017
  14. ↑ "Human PubMed Reference:".
  15. ↑ "Mouse PubMed Reference:".
  16. ↑ Goldstein I, Meston CM, Davis S, Traish A (17 November 2005). Women's Sexual Function and Dysfunction: Study, Diagnosis and Treatment. CRC Press. pp. 205–. ISBN 978-1-84214-263-9.
  17. 1 2 Acevedo-Rodriguez A, Mani SK, Handa RJ (2015). "Oxytocin and Estrogen Receptor β in the Brain: An Overview". Frontiers in Endocrinology. 6: 160. PMC 4606117 Freely accessible. PMID 26528239. doi:10.3389/fendo.2015.00160.
  18. ↑ Sausville E, Carney D, Battey J (August 1985). "The human vasopressin gene is linked to the oxytocin gene and is selectively expressed in a cultured lung cancer cell line". The Journal of Biological Chemistry. 260 (18): 10236–41. PMID 2991279.
  19. ↑ Repaske DR, Phillips JA, Kirby LT, Tze WJ, D'Ercole AJ, Battey J (March 1990). "Molecular analysis of autosomal dominant neurohypophyseal diabetes insipidus". The Journal of Clinical Endocrinology and Metabolism. 70 (3): 752–7. PMID 1968469. doi:10.1210/jcem-70-3-752.
  20. ↑ Summar ML, Phillips JA, Battey J, Castiglione CM, Kidd KK, Maness KJ, Weiffenbach B, Gravius TC (June 1990). "Linkage relationships of human arginine vasopressin-neurophysin-II and oxytocin-neurophysin-I to prodynorphin and other loci on chromosome 20". Molecular Endocrinology. 4 (6): 947–50. PMID 1978246. doi:10.1210/mend-4-6-947.
  21. ↑ Brownstein MJ, Russell JT, Gainer H (January 1980). "Synthesis, transport, and release of posterior pituitary hormones". Science. 207 (4429): 373–8. PMID 6153132. doi:10.1126/science.6153132.
  22. ↑ Sheldrick EL, Flint AP (July 1989). "Post-translational processing of oxytocin-neurophysin prohormone in the ovine corpus luteum: activity of peptidyl glycine alpha-amidating mono-oxygenase and concentrations of its cofactor, ascorbic acid". The Journal of Endocrinology. 122 (1): 313–22. PMID 2769155. doi:10.1677/joe.0.1220313.
  23. ↑ Luck MR, Jungclas B (September 1987). "Catecholamines and ascorbic acid as stimulators of bovine ovarian oxytocin secretion". The Journal of Endocrinology. 114 (3): 423–30. PMID 3668432. doi:10.1677/joe.0.1140423.
  24. ↑ Hornig D (September 1975). "Distribution of ascorbic acid, metabolites and analogues in man and animals". Annals of the New York Academy of Sciences. 258: 103–18. PMID 1106295. doi:10.1111/j.1749-6632.1975.tb29271.x.
  25. 1 2 Tsujimoto M, Hattori A (August 2005). "The oxytocinase subfamily of M1 aminopeptidases". Biochimica et Biophysica Acta. 1751 (1): 9–18. PMID 16054015. doi:10.1016/j.bbapap.2004.09.011.
  26. ↑ Nomura S, Ito T, Yamamoto E, Sumigama S, Iwase A, Okada M, Shibata K, Ando H, Ino K, Kikkawa F, Mizutani S (August 2005). "Gene regulation and physiological function of placental leucine aminopeptidase/oxytocinase during pregnancy". Biochimica et Biophysica Acta. 1751 (1): 19–25. PMID 15894523. doi:10.1016/j.bbapap.2005.04.006.
  27. 1 2 Mizutani S, Yokosawa H, Tomoda Y (July 1992). "Degradation of oxytocin by the human placenta: effect of selective inhibitors". Acta Endocrinologica. 127 (1): 76–80. PMID 1355623. doi:10.1530/acta.0.1270076.
  28. ↑ Meisenberg G, Simmons WH (1984). "Amastatin potentiates the behavioral effects of vasopressin and oxytocin in mice". Peptides. 5 (3): 535–9. PMID 6540873. doi:10.1016/0196-9781(84)90083-4.
  29. ↑ Stancampiano R, Melis MR, Argiolas A (1991). "Proteolytic conversion of oxytocin by brain synaptic membranes: role of aminopeptidases and endopeptidases". Peptides. 12 (5): 1119–25. PMID 1800950. doi:10.1016/0196-9781(91)90068-z.
  30. ↑ Itoh C, Watanabe M, Nagamatsu A, Soeda S, Kawarabayashi T, Shimeno H (January 1997). "Two molecular species of oxytocinase (L-cystine aminopeptidase) in human placenta: purification and characterization". Biological & Pharmaceutical Bulletin. 20 (1): 20–4. PMID 9013800. doi:10.1248/bpb.20.20.
  31. 1 2 3 Ross HE, Cole CD, Smith Y, Neumann ID, Landgraf R, Murphy AZ, Young LJ (September 2009). "Characterization of the oxytocin system regulating affiliative behavior in female prairie voles". Neuroscience. 162 (4): 892–903. PMC 2744157 Freely accessible. PMID 19482070. doi:10.1016/j.neuroscience.2009.05.055.
  32. ↑ Landgraf R, Neumann ID (2004). "Vasopressin and oxytocin release within the brain: a dynamic concept of multiple and variable modes of neuropeptide communication". Frontiers in Neuroendocrinology. 25 (3–4): 150–76. PMID 15589267. doi:10.1016/j.yfrne.2004.05.001.
  33. ↑ Baribeau DA, Anagnostou E (2015). "Oxytocin and vasopressin: linking pituitary neuropeptides and their receptors to social neurocircuits". Frontiers in Neuroscience. 9: 335. PMC 4585313 Freely accessible. PMID 26441508. doi:10.3389/fnins.2015.00335.
  34. ↑ Wathes DC, Swann RW (May 1982). "Is oxytocin an ovarian hormone?". Nature. 297 (5863): 225–7. PMID 7078636. doi:10.1038/297225a0.
  35. ↑ Wathes DC, Swann RW, Pickering BT, Porter DG, Hull MG, Drife JO (August 1982). "Neurohypophysial hormones in the human ovary". Lancet. 2 (8295): 410–2. PMID 6124806. doi:10.1016/S0140-6736(82)90441-X.
  36. ↑ Fields PA, Eldridge RK, Fuchs AR, Roberts RF, Fields MJ (April 1983). "Human placental and bovine corpora luteal oxytocin". Endocrinology. 112 (4): 1544–6. PMID 6832059. doi:10.1210/endo-112-4-1544.
  37. ↑ Guldenaar SE, Pickering BT (1985). "Immunocytochemical evidence for the presence of oxytocin in rat testis". Cell and Tissue Research. 240 (2): 485–7. PMID 3995564. doi:10.1007/BF00222364.
  38. ↑ Gauquelin G, Geelen G, Louis F, Allevard AM, Meunier C, Cuisinaud G, Benjanet S, Seidah NG, Chretien M, Legros JJ (1983). "Presence of vasopressin, oxytocin and neurophysin in the retina of mammals, effect of light and darkness, comparison with the neuropeptide content of the neurohypophysis and the pineal gland". Peptides. 4 (4): 509–15. PMID 6647119. doi:10.1016/0196-9781(83)90056-6.
  39. ↑ Ang VT, Jenkins JS (April 1984). "Neurohypophysial hormones in the adrenal medulla". The Journal of Clinical Endocrinology and Metabolism. 58 (4): 688–91. PMID 6699132. doi:10.1210/jcem-58-4-688.
  40. ↑ Geenen V, Legros JJ, Franchimont P, Baudrihaye M, Defresne MP, Boniver J (April 1986). "The neuroendocrine thymus: coexistence of oxytocin and neurophysin in the human thymus". Science. 232 (4749): 508–11. PMID 3961493. doi:10.1126/science.3961493.
  41. ↑ Amico JA, Finn FM, Haldar J (November 1988). "Oxytocin and vasopressin are present in human and rat pancreas". The American Journal of the Medical Sciences. 296 (5): 303–7. PMID 3195625. doi:10.1097/00000441-198811000-00003.
  42. ↑ Kukucka MA, Misra HP (1992). "HPLC determination of an oxytocin-like peptide produced by isolated guinea pig Leydig cells: stimulation by ascorbate". Archives of Andrology. 29 (2): 185–90. PMID 1456839. doi:10.3109/01485019208987723.
  43. ↑ Venkatesh B, Si-Hoe SL, Murphy D, Brenner S (November 1997). "Transgenic rats reveal functional conservation of regulatory controls between the Fugu isotocin and rat oxytocin genes". Proceedings of the National Academy of Sciences of the United States of America. 94 (23): 12462–6. PMC 25001 Freely accessible. PMID 9356472. doi:10.1073/pnas.94.23.12462.
  44. ↑ Gimpl G, Fahrenholz F (April 2001). "The oxytocin receptor system: structure, function, and regulation". Physiological Reviews. 81 (2): 629–83. PMID 11274341.
  45. 1 2 Lee HJ, Macbeth AH, Pagani JH, Young WS (June 2009). "Oxytocin: the great facilitator of life". Progress in Neurobiology. 88 (2): 127–51. PMC 2689929 Freely accessible. PMID 19482229. doi:10.1016/j.pneurobio.2009.04.001.
  46. ↑ Human Milk and Lactation at eMedicine
  47. ↑ MacGill, Markus. "What is oxytocin, and what does it do?". Medical News Today. Heath Line Media. Retrieved March 29, 2017.
  48. 1 2 Takayanagi Y, Yoshida M, Bielsky IF, Ross HE, Kawamata M, Onaka T, Yanagisawa T, Kimura T, Matzuk MM, Young LJ, Nishimori K (November 2005). "Pervasive social deficits, but normal parturition, in oxytocin receptor-deficient mice". Proceedings of the National Academy of Sciences of the United States of America. 102 (44): 16096–101. PMC 1276060 Freely accessible. PMID 16249339. doi:10.1073/pnas.0505312102.
  49. ↑ Paquin J, Danalache BA, Jankowski M, McCann SM, Gutkowska J (July 2002). "Oxytocin induces differentiation of P19 embryonic stem cells to cardiomyocytes". Proceedings of the National Academy of Sciences of the United States of America. 99 (14): 9550–5. PMC 123178 Freely accessible. PMID 12093924. doi:10.1073/pnas.152302499.
  50. ↑ Jankowski M, Danalache B, Wang D, Bhat P, Hajjar F, Marcinkiewicz M, Paquin J, McCann SM, Gutkowska J (August 2004). "Oxytocin in cardiac ontogeny". Proceedings of the National Academy of Sciences of the United States of America. 101 (35): 13074–9. PMC 516519 Freely accessible. PMID 15316117. doi:10.1073/pnas.0405324101.
  51. ↑ Hartwig W (1989). Endokrynologia praktyczna. Warsaw: Państwowy Zakład Wydawnictw Lekarskich. ISBN 83-200-1415-8.
  52. ↑ Tyzio R, Cossart R, Khalilov I, Minlebaev M, Hübner CA, Represa A, Ben-Ari Y, Khazipov R (December 2006). "Maternal oxytocin triggers a transient inhibitory switch in GABA signaling in the fetal brain during delivery". Science. 314 (5806): 1788–92. PMID 17170309. doi:10.1126/science.1133212.
  53. ↑ Atasoy D, Betley JN, Su HH, Sternson SM (August 2012). "Deconstruction of a neural circuit for hunger". Nature. 488 (7410): 172–7. PMC 3416931 Freely accessible. PMID 22801496. doi:10.1038/nature11270.
  54. 1 2 Jacob S, Brune CW, Carter CS, Leventhal BL, Lord C, Cook EH (April 2007). "Association of the oxytocin receptor gene (OXTR) in Caucasian children and adolescents with autism". Neuroscience Letters. 417 (1): 6–9. PMC 2705963 Freely accessible. PMID 17383819. doi:10.1016/j.neulet.2007.02.001.
  55. ↑ Wermter AK, Kamp-Becker I, Hesse P, Schulte-Körne G, Strauch K, Remschmidt H (March 2010). "Evidence for the involvement of genetic variation in the oxytocin receptor gene (OXTR) in the etiology of autistic disorders on high-functioning level". American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics. 153B (2): 629–39. PMID 19777562. doi:10.1002/ajmg.b.31032.
  56. ↑ Vacek M, High on Fidelity. What can voles teach us about monogamy?
  57. ↑ Kuchinskas Susan, The Chemistry of Connection: How the Oxytocin Response Can Help You Find Trust, Intimacy, and Love p65
  58. ↑ van Leengoed E, Kerker E, Swanson HH (February 1987). "Inhibition of post-partum maternal behaviour in the rat by injecting an oxytocin antagonist into the cerebral ventricles". The Journal of Endocrinology. 112 (2): 275–82. PMID 3819639. doi:10.1677/joe.0.1120275.
  59. ↑ Kendrick KM (2004-01-01). "The Neurobiology of Social Bonds". British Society for Neuroendocrinology. Retrieved 2009-04-13.
  60. ↑ Bick J, Dozier M (January 2010). "Mothers' and Children's Concentrations of Oxytocin Following Close, Physical Interactions with Biological and Non-biological Children". Developmental Psychobiology. 52 (1): 100–107. PMC 2953948 Freely accessible. PMID 20953313. doi:10.1002/dev.20411.
  61. ↑ Sheng F, Liu Y, Zhou B, Zhou W, Han S (February 2013). "Oxytocin modulates the racial bias in neural responses to others' suffering". Biological Psychology. 92 (2): 380–6. PMID 23246533. doi:10.1016/j.biopsycho.2012.11.018.
  62. ↑ Shalvi S, De Dreu CK (April 2014). "Oxytocin promotes group-serving dishonesty". Proceedings of the National Academy of Sciences of the United States of America. 111 (15): 5503–7. PMC 3992689 Freely accessible. PMID 24706799. doi:10.1073/pnas.1400724111.
  63. ↑ De Dreu CK, Shalvi S, Greer LL, Van Kleef GA, Handgraaf MJ (2012). "Oxytocin motivates non-cooperation in intergroup conflict to protect vulnerable in-group members". PloS One. 7 (11): e46751. PMC 3492361 Freely accessible. PMID 23144787. doi:10.1371/journal.pone.0046751.
  64. ↑ Stallen M, De Dreu CK, Shalvi S, Smidts A, Sanfey AG (2012). "The herding hormone: oxytocin stimulates in-group conformity". Psychological Science. 23 (11): 1288–92. PMID 22991128. doi:10.1177/0956797612446026.
  65. 1 2 3 De Dreu CK, Greer LL, Van Kleef GA, Shalvi S, Handgraaf MJ (January 2011). "Oxytocin promotes human ethnocentrism". Proceedings of the National Academy of Sciences of the United States of America. 108 (4): 1262–6. PMC 3029708 Freely accessible. PMID 21220339. doi:10.1073/pnas.1015316108.
  66. ↑ Ma X, Luo L, Geng Y, Zhao W, Zhang Q, Kendrick KM (2014). "Oxytocin increases liking for a country's people and national flag but not for other cultural symbols or consumer products". Frontiers in Behavioral Neuroscience. 8: 266. PMC 4122242 Freely accessible. PMID 25140135. doi:10.3389/fnbeh.2014.00266.
  67. ↑ Kovács GL, Sarnyai Z, Szabó G (November 1998). "Oxytocin and addiction: a review". Psychoneuroendocrinology. 23 (8): 945–62. PMID 9924746. doi:10.1016/S0306-4530(98)00064-X.
  68. ↑ Thompson MR, Callaghan PD, Hunt GE, Cornish JL, McGregor IS (May 2007). "A role for oxytocin and 5-HT(1A) receptors in the prosocial effects of 3,4 methylenedioxymethamphetamine ("ecstasy")". Neuroscience. 146 (2): 509–14. PMID 17383105. doi:10.1016/j.neuroscience.2007.02.032.
  69. ↑ Uvnäs-Moberg K, Hillegaart V, Alster P, Ahlenius S (1996). "Effects of 5-HT agonists, selective for different receptor subtypes, on oxytocin, CCK, gastrin and somatostatin plasma levels in the rat". Neuropharmacology. 35 (11): 1635–40. PMID 9025112. doi:10.1016/S0028-3908(96)00078-0.
  70. ↑ Chiodera P, Volpi R, Capretti L, Caffarri G, Magotti MG, Coiro V (April 1996). "Different effects of the serotonergic agonists buspirone and sumatriptan on the posterior pituitary hormonal responses to hypoglycemia in humans". Neuropeptides. 30 (2): 187–92. PMID 8771561. doi:10.1016/S0143-4179(96)90086-4.
  71. ↑ Buisman-Pijlman FT, Sumracki NM, Gordon JJ, Hull PR, Carter CS, Tops M (April 2014). "Individual differences underlying susceptibility to addiction: Role for the endogenous oxytocin system". Pharmacology, Biochemistry, and Behavior. 119: 22–38. PMID 24056025. doi:10.1016/j.pbb.2013.09.005.
  72. ↑ Grillon C, Krimsky M, Charney DR, Vytal K, Ernst M, Cornwell B (September 2013). "Oxytocin increases anxiety to unpredictable threat". Molecular Psychiatry. 18 (9): 958–60. PMC 3930442 Freely accessible. PMID 23147382. doi:10.1038/mp.2012.156.
  73. 1 2 Guzmán YF, Tronson NC, Jovasevic V, Sato K, Guedea AL, Mizukami H, Nishimori K, Radulovic J (September 2013). "Fear-enhancing effects of septal oxytocin receptors". Nature Neuroscience. 16 (9): 1185–7. PMC 3758455 Freely accessible. PMID 23872596. doi:10.1038/nn.3465.
  74. 1 2 3 Theodoridou A, Penton-Voak IS, Rowe AC (2013). "A direct examination of the effect of intranasal administration of oxytocin on approach-avoidance motor responses to emotional stimuli". PloS One. 8 (2): e58113. PMC 3585234 Freely accessible. PMID 23469148. doi:10.1371/journal.pone.0058113.
  75. ↑ Kirsch P, Esslinger C, Chen Q, Mier D, Lis S, Siddhanti S, Gruppe H, Mattay VS, Gallhofer B, Meyer-Lindenberg A (December 2005). "Oxytocin modulates neural circuitry for social cognition and fear in humans". The Journal of Neuroscience. 25 (49): 11489–93. PMID 16339042. doi:10.1523/JNEUROSCI.3984-05.2005.
  76. ↑ Huber D, Veinante P, Stoop R (April 2005). "Vasopressin and oxytocin excite distinct neuronal populations in the central amygdala". Science. 308 (5719): 245–8. PMID 15821089. doi:10.1126/SCIENCE.1105636.
  77. ↑ Viviani D, Charlet A, van den Burg E, Robinet C, Hurni N, Abatis M, Magara F, Stoop R (July 2011). "Oxytocin selectively gates fear responses through distinct outputs from the central amygdala". Science. 333 (6038): 104–7. PMID 21719680. doi:10.1126/SCIENCE.1201043.
  78. ↑ Shamay-Tsoory SG, Fischer M, Dvash J, Harari H, Perach-Bloom N, Levkovitz Y (November 2009). "Intranasal administration of oxytocin increases envy and schadenfreude (gloating)". Biological Psychiatry. 66 (9): 864–70. PMID 19640508. doi:10.1016/j.biopsych.2009.06.009.
  79. ↑ Fischer-Shofty M, Shamay-Tsoory SG, Harari H, Levkovitz Y (January 2010). "The effect of intranasal administration of oxytocin on fear recognition". Neuropsychologia. 48 (1): 179–84. PMID 19747930. doi:10.1016/j.neuropsychologia.2009.09.003.
  80. 1 2 3 Matsuzaki M, Matsushita H, Tomizawa K, Matsui H (November 2012). "Oxytocin: a therapeutic target for mental disorders". The Journal of Physiological Sciences. 62 (6): 441–4. PMID 23007624. doi:10.1007/s12576-012-0232-9.
  81. ↑ McQuaid RJ, McInnis OA, Abizaid A, Anisman H (September 2014). "Making room for oxytocin in understanding depression". Neuroscience and Biobehavioral Reviews. 45: 305–22. PMID 25025656. doi:10.1016/j.neubiorev.2014.07.005.
  82. 1 2 Shalev I, Ebstein RP (11 February 2015). Social Hormones and Human Behavior: What Do We Know and Where Do We Go from Here. Frontiers Media SA. pp. 51–. ISBN 978-2-88919-407-0.
  83. ↑ Hicks C, Ramos L, Reekie T, Misagh GH, Narlawar R, Kassiou M, McGregor IS (June 2014). "Body temperature and cardiac changes induced by peripherally administered oxytocin, vasopressin and the non-peptide oxytocin receptor agonist WAY 267,464: a biotelemetry study in rats". British Journal of Pharmacology. 171 (11): 2868–87. PMC 4243861 Freely accessible. PMID 24641248. doi:10.1111/bph.12613.
  84. ↑ Manning M, Misicka A, Olma A, Bankowski K, Stoev S, Chini B, Durroux T, Mouillac B, Corbani M, Guillon G (April 2012). "Oxytocin and vasopressin agonists and antagonists as research tools and potential therapeutics". Journal of Neuroendocrinology. 24 (4): 609–28. PMC 3490377 Freely accessible. PMID 22375852. doi:10.1111/j.1365-2826.2012.02303.x.
  85. 1 2 Lischke A, Gamer M, Berger C, Grossmann A, Hauenstein K, Heinrichs M, Herpertz SC, Domes G (September 2012). "Oxytocin increases amygdala reactivity to threatening scenes in females". Psychoneuroendocrinology. 37 (9): 1431–8. PMID 22365820. doi:10.1016/j.psyneuen.2012.01.011.
  86. ↑ Okabe S, Kitano K, Nagasawa M, Mogi K, Kikusui T (June 2013). "Testosterone inhibits facilitating effects of parenting experience on parental behavior and the oxytocin neural system in mice". Physiology & Behavior. 118: 159–64. PMID 23685236. doi:10.1016/j.physbeh.2013.05.017.
  87. 1 2 Hurlemann R, Patin A, Onur OA, Cohen MX, Baumgartner T, Metzler S, Dziobek I, Gallinat J, Wagner M, Maier W, Kendrick KM (April 2010). "Oxytocin enhances amygdala-dependent, socially reinforced learning and emotional empathy in humans". The Journal of Neuroscience. 30 (14): 4999–5007. PMID 20371820. doi:10.1523/JNEUROSCI.5538-09.2010.
  88. ↑ Zak PJ, Stanton AA, Ahmadi S (November 2007). Brosnan S, ed. "Oxytocin increases generosity in humans". PloS One. 2 (11): e1128. PMC 2040517 Freely accessible. PMID 17987115. doi:10.1371/journal.pone.0001128.
  89. ↑ Conlisk J (2011). "Professor Zak's empirical studies on trust and oxytocin". J Econ Behav Organizat. 78 (1–2): 160–166. doi:10.1016/j.jebo.2011.01.002.
  90. ↑ Domes G, Heinrichs M, Michel A, Berger C, Herpertz SC (March 2007). "Oxytocin improves "mind-reading" in humans". Biological Psychiatry. 61 (6): 731–3. PMID 17137561. doi:10.1016/j.biopsych.2006.07.015.
  91. ↑ Guastella AJ, Mitchell PB, Dadds MR (January 2008). "Oxytocin increases gaze to the eye region of human faces". Biological Psychiatry. 63 (1): 3–5. PMID 17888410. doi:10.1016/j.biopsych.2007.06.026.
  92. ↑ Singer T, Snozzi R, Bird G, Petrovic P, Silani G, Heinrichs M, Dolan RJ (December 2008). "Effects of oxytocin and prosocial behavior on brain responses to direct and vicariously experienced pain". Emotion. 8 (6): 781–91. PMC 2672051 Freely accessible. PMID 19102589. doi:10.1037/a0014195.
  93. 1 2 Theodoridou A, Rowe AC, Penton-Voak IS, Rogers PJ (June 2009). "Oxytocin and social perception: oxytocin increases perceived facial trustworthiness and attractiveness". Hormones and Behavior. 56 (1): 128–32. PMID 19344725. doi:10.1016/j.yhbeh.2009.03.019.
  94. 1 2 Lane A, Luminet O, Rimé B, Gross JJ, de Timary P, Mikolajczak M (2013). "Oxytocin increases willingness to socially share one's emotions". International Journal of Psychology. 48 (4): 676–81. PMID 22554106. doi:10.1080/00207594.2012.677540.
  95. 1 2 Cardoso C, Ellenbogen MA, Serravalle L, Linnen AM (November 2013). "Stress-induced negative mood moderates the relation between oxytocin administration and trust: evidence for the tend-and-befriend response to stress?". Psychoneuroendocrinology. 38 (11): 2800–4. PMID 23768973. doi:10.1016/j.psyneuen.2013.05.006.
  96. ↑ Baumgartner T, Heinrichs M, Vonlanthen A, Fischbacher U, Fehr E (May 2008). "Oxytocin shapes the neural circuitry of trust and trust adaptation in humans". Neuron. 58 (4): 639–50. PMID 18498743. doi:10.1016/j.neuron.2008.04.009.
  97. ↑ Kosfeld M, Heinrichs M, Zak PJ, Fischbacher U, Fehr E (June 2005). "Oxytocin increases trust in humans". Nature. 435 (7042): 673–6. PMID 15931222. doi:10.1038/nature03701.
  98. ↑ Tabak BA, McCullough ME, Carver CS, Pedersen EJ, Cuccaro ML (June 2014). "Variation in oxytocin receptor gene (OXTR) polymorphisms is associated with emotional and behavioral reactions to betrayal". Social Cognitive and Affective Neuroscience. 9 (6): 810–6. PMC 4040089 Freely accessible. PMID 23547247. doi:10.1093/scan/nst042.
  99. 1 2 Marazziti D, Dell'Osso B, Baroni S, Mungai F, Catena M, Rucci P, Albanese F, Giannaccini G, Betti L, Fabbrini L, Italiani P, Del Debbio A, Lucacchini A, Dell'Osso L (October 2006). "A relationship between oxytocin and anxiety of romantic attachment". Clinical Practice and Epidemiology in Mental Health. 2 (1): 28. PMC 1621060 Freely accessible. PMID 17034623. doi:10.1186/1745-0179-2-28.
  100. ↑ Shalvi S, De Dreu CK (April 2014). "Oxytocin promotes group-serving dishonesty". Proceedings of the National Academy of Sciences of the United States of America. 111 (15): 5503–7. PMC 3992689 Freely accessible. PMID 24706799. doi:10.1073/pnas.1400724111. Lay summary – BBC News (2 April 2014).
  101. 1 2 3 Carmichael MS, Humbert R, Dixen J, Palmisano G, Greenleaf W, Davidson JM (January 1987). "Plasma oxytocin increases in the human sexual response". The Journal of Clinical Endocrinology and Metabolism. 64 (1): 27–31. PMID 3782434. doi:10.1210/jcem-64-1-27.
  102. ↑ Carmichael MS, Warburton VL, Dixen J, Davidson JM (February 1994). "Relationships among cardiovascular, muscular, and oxytocin responses during human sexual activity". Archives of Sexual Behavior. 23 (1): 59–79. PMID 8135652. doi:10.1007/BF01541618.
  103. ↑ Blaicher W, Gruber D, Bieglmayer C, Blaicher AM, Knogler W, Huber JC (1999). "The role of oxytocin in relation to female sexual arousal". Gynecologic and Obstetric Investigation. 47 (2): 125–6. PMID 9949283. doi:10.1159/000010075.
  104. ↑ Anderson-Hunt M, Dennerstein L (1995). "Oxytocin and female sexuality". Gynecologic and Obstetric Investigation. 40 (4): 217–21. PMID 8586300. doi:10.1159/000292340.
  105. ↑ Murphy MR, Seckl JR, Burton S, Checkley SA, Lightman SL (October 1987). "Changes in oxytocin and vasopressin secretion during sexual activity in men". The Journal of Clinical Endocrinology and Metabolism. 65 (4): 738–41. PMID 3654918. doi:10.1210/jcem-65-4-738.
  106. ↑ Krüger TH, Haake P, Chereath D, Knapp W, Janssen OE, Exton MS, Schedlowski M, Hartmann U (April 2003). "Specificity of the neuroendocrine response to orgasm during sexual arousal in men". The Journal of Endocrinology. 177 (1): 57–64. PMID 12697037. doi:10.1677/joe.0.1770057.
  107. ↑ Scheele D, Striepens N, Güntürkün O, Deutschländer S, Maier W, Kendrick KM, Hurlemann R (November 2012). "Oxytocin modulates social distance between males and females". The Journal of Neuroscience. 32 (46): 16074–9. PMID 23152592. doi:10.1523/JNEUROSCI.2755-12.2012.
  108. ↑ Malik AI, Zai CC, Abu Z, Nowrouzi B, Beitchman JH (July 2012). "The role of oxytocin and oxytocin receptor gene variants in childhood-onset aggression". Genes, Brain, and Behavior. 11 (5): 545–51. PMID 22372486. doi:10.1111/j.1601-183X.2012.00776.x.
  109. ↑ Zak PJ, Kurzban R, Matzner WT (December 2004). "The neurobiology of trust". Annals of the New York Academy of Sciences. 1032 (1): 224–7. PMID 15677415. doi:10.1196/annals.1314.025.
  110. ↑ Gouin JP, Carter CS, Pournajafi-Nazarloo H, Glaser R, Malarkey WB, Loving TJ, Stowell J, Kiecolt-Glaser JK (August 2010). "Marital behavior, oxytocin, vasopressin, and wound healing". Psychoneuroendocrinology. 35 (7): 1082–90. PMC 2888874 Freely accessible. PMID 20144509. doi:10.1016/j.psyneuen.2010.01.009.
  111. ↑ Nakajima M, Görlich A, Heintz N (October 2014). "Oxytocin modulates female sociosexual behavior through a specific class of prefrontal cortical interneurons". Cell. 159 (2): 295–305. PMC 4206218 Freely accessible. PMID 25303526. doi:10.1016/j.cell.2014.09.020. Lay summary – SciGuru Science News.
  112. ↑ Heinrichs M, Baumgartner T, Kirschbaum C, Ehlert U (December 2003). "Social support and oxytocin interact to suppress cortisol and subjective responses to psychosocial stress". Biological Psychiatry. 54 (12): 1389–98. PMID 14675803. doi:10.1016/S0006-3223(03)00465-7.
  113. 1 2 Burtis CA, Ashwood ER, Bruns DE (2012). Tietz Textbook of Clinical Chemistry and Molecular Diagnostics (5th ed.). Elsevier Health Sciences. p. 1833. ISBN 9781455759422.
  114. ↑ Lee AG, Cool DR, Grunwald WC, Neal DE, Buckmaster CL, Cheng MY, Hyde SA, Lyons DM, Parker KJ (August 2011). "A novel form of oxytocin in New World monkeys". Biology Letters. 7 (4): 584–7. PMC 3130245 Freely accessible. PMID 21411453. doi:10.1098/rsbl.2011.0107.
  115. ↑ Vargas-Pinilla P, Paixão-Côrtes VR, Paré P, Tovo-Rodrigues L, Vieira CM, Xavier A, Comas D, Pissinatti A, Sinigaglia M, Rigo MM, Vieira GF, Lucion AB, Salzano FM, Bortolini MC (January 2015). "Evolutionary pattern in the OXT-OXTR system in primates: coevolution and positive selection footprints". Proceedings of the National Academy of Sciences of the United States of America. 112 (1): 88–93. PMC 4291646 Freely accessible. PMID 25535371. doi:10.1073/pnas.1419399112.
  116. ↑ Ren D, Lu G, Moriyama H, Mustoe AC, Harrison EB, French JA (2015). "Genetic diversity in oxytocin ligands and receptors in New World monkeys". PloS One. 10 (5): e0125775. PMC 4418824 Freely accessible. PMID 25938568. doi:10.1371/journal.pone.0125775.
  117. ↑ du Vigneaud V. (1960). "Experiences in the Polypeptide Field: Insulin to Oxytocin". Annals of the New York Academy of Sciences. 88 (3): 537–48. doi:10.1111/j.1749-6632.1960.tb20052.x.
  118. ↑ Kukucka MA (1993-04-18). "Mechanisms by which hypoxia augments Leydig cell viability and differentiated cell function in vitro". Digital Library and Archives. Retrieved 2010-02-21.
  119. ↑ du Vigneaud V, Ressler C, Swan JM, Roberts CW, Katsoyannis PG (1954). "The Synthesis of Oxytocin". Journal of the American Chemical Society. 76 (12): 3115–3121. doi:10.1021/ja01641a004.
  120. ↑ "The Nobel Prize in Chemistry 1955". Nobelprize.org. Nobel Media AB. Retrieved 17 November 2016.
  121. ↑ Leng, G; Brown, CH; Russell, JA (April 1999). "Physiological pathways regulating the activity of magnocellular neurosecretory cells". Progress in neurobiology. 57 (6): 625–655. PMID 10221785. doi:10.1016/s0301-0082(98)00072-0.
  122. ↑ Dale HH (May 1906). "On some physiological actions of ergot". The Journal of Physiology. 34 (3): 163–206. PMC 1465771 Freely accessible. PMID 16992821. doi:10.1113/jphysiol.1906.sp001148.
  123. ↑ Ott I, Scott JC (1910). "The Action of Infundibulum upon Mammary Secretion". Proc Soc Exp Biol. 8: 48–49.
  124. ↑ Schafer EA, Mackenzie K (July 1911). "The Action of Animal Extracts on Milk Secretion". Proceedings of the Royal Society B. 84 (568): 16–22. doi:10.1098/rspb.1911.0042.
  125. ↑ Du Vigneaud V, Ressler C, Trippett S (December 1953). "The sequence of amino acids in oxytocin, with a proposal for the structure of oxytocin". The Journal of Biological Chemistry. 205 (2): 949–57. PMID 13129273.
  126. ↑ du Vigneaud V, Ressler C, Swan JM, Roberts CW, Katsoyannis PG, Gordon S (1953). "The synthesis of an octapeptide amide with the hormonal activity of oxytocin". J. Am. Chem. Soc. 75 (19): 4879–80. doi:10.1021/ja01115a553.
  127. ↑ du Vigneaud V, Ressler C, Swan JM, Roberts CW, Katsoyannis PG (June 1954). "The synthesis of oxytocin". J. Am. Chem. Soc. 76 (12): 3115–3121. doi:10.1021/ja01641a004.
  128. ↑ du Vigneaud V, Ressler C, Swan JM, Roberts CW, Katsoyannis PG (1954). "The Synthesis of Oxytocin1". Journal of the American Chemical Society. 76 (12): 3115–21. doi:10.1021/ja01641a004.
  129. ↑ Du Vigneaud V (June 1956). "Trail of sulfur research: from insulin to oxytocin". Science. 123 (3205): 967–74. PMID 13324123. doi:10.1126/science.123.3205.967.

Further reading

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.