Gerty Cori

Gerty Cori
Gerty Cori in 1947
Born	Gerty Theresa Radnitz (1896-08-15)August 15, 1896 Prague, Austro-Hungarian Empire
Died	October 26, 1957(1957-10-26) (aged 61) Glendale, Missouri, USA
Cause of death	Myelosclerosis
Residence	American
Other names	Gerty Theresa Cori
Alma mater	Karl-Ferdinands-Universität in Prague
Occupation	Biochemist
Known for	Extensive research on carbohydrate metabolism; described the Cori cycle; identified Glucose 1-phosphate
Spouse(s)	Carl Ferdinand Cori (m. 1920–57)
Awards	Many awards and recognitions, including Nobel Prize in Physiology or Medicine (1947) Garvan–Olin Medal (1948)

Gerty Cori with her husband and fellow-Nobelist, Carl Ferdinand Cori, in 1947.^[1]

Gerty Theresa Cori (née Radnitz; August 15, 1896 – October 26, 1957) was a Czech-American biochemist who became the third woman—and first American woman—to win a Nobel Prize in science, and the first woman to be awarded the Nobel Prize in Physiology or Medicine.

Cori was born in Prague (then in the Austro-Hungarian Empire, now the Czech Republic). Growing up at a time when women were marginalized in science and allowed few educational opportunities, she gained admittance to medical school, where she met her future husband Carl Ferdinand Cori; upon their graduation in 1920, they married. Because of deteriorating conditions in Europe, the couple emigrated to the United States in 1922. Gerty Cori continued her early interest in medical research, collaborating in the laboratory with Carl. She published research findings coauthored with her husband, as well as publishing singly. Unlike her husband, she had difficulty securing research positions, and the ones she obtained provided meager pay. Her husband insisted on continuing their collaboration, though he was discouraged from doing so by the institutions that employed him.

With her husband Carl and Argentine physiologist Bernardo Houssay, Gerty Cori received the Nobel Prize in 1947 for the discovery of the mechanism by which glycogen—a derivative of glucose—is broken down in muscle tissue into lactic acid and then resynthesized in the body and stored as a source of energy (known as the Cori cycle). They also identified the important catalyzing compound, the Cori ester. In 2004, both Gerty and Carl Cori were designated a National Historic Chemical Landmark in recognition of their work in clarifying carbohydrate metabolism.^[2]

In 1957, Gerty Cori died after a ten-year struggle with myelosclerosis. She remained active in the research laboratory until the end. She received recognition for her achievements through multiple awards and honors. The Cori crater on the Moon and the Cori crater^[3] on Venus are named after her.

Life and work

Gerty Theresa Radnitz was born into a Jewish family in Prague in 1896. Her father, Otto Radnitz, was a chemist who became manager of sugar refineries after inventing a successful method for refining sugar. Her mother, Martha, a friend of Franz Kafka, was a culturally sophisticated woman.^[2] Gerty was tutored at home before enrolling in a Lyceum for girls, and at the age of 16 she decided she wanted to be a medical doctor. Her uncle, a professor of pediatrics, encouraged her to attend medical school, so she studied for and passed the University entrance examination. She was admitted to the medical school of the Karl-Ferdinands-Universität in Prague in 1914 and was awarded a Doctorate in Medicine in 1920. While studying she met Carl Cori who was immediately attracted to her charm, vitality, sense of humor and her love of the outdoors and mountain climbing.^[4] They married in 1920 following graduation. Gerty converted to Catholicism, enabling her and Carl to marry in the Roman Catholic Church.^[5][6] They moved to Vienna, Austria, where Gerty spent the next two years at the Carolinen Children's Hospital, and her husband worked in a laboratory.^[4] While at the hospital, Gerty Cori worked on the pediatrics unit and conducted experiments in temperature regulation, comparing temperatures before and after thyroid treatment, and published papers on blood disorders.^[2] Life was difficult following World War I, and Gerty suffered from xerophthalmia caused by severe malnutrition due to food shortages. These problems, in conjunction with the increasing anti-Semitism, contributed to the Coris' decision to leave Europe.^[7]

In 1922, the Coris both immigrated to the United States (Gerty six months after Carl because of difficulty in obtaining a position there) to pursue medical research at the "State Institute for the Study of Malignant Diseases" (now the Roswell Park Cancer Institute) in Buffalo, New York. In 1928, they became naturalized citizens of the United States.^[8][9]

Although the Coris were discouraged from working together at Roswell, they continued to do so, specializing in investigating carbohydrate metabolism. They were particularly interested in how glucose is metabolized in the human body and the hormones that regulate this process.^[4] They published fifty papers while at Roswell, with first author status going to the one who had done most of the research for a given paper. Gerty Cori published eleven articles as the sole author. In 1929, they proposed the theoretical cycle that later won them the Nobel Prize, the Cori cycle.^[8] The cycle describes how the human body uses chemical reactions to break some carbohydrates such as glycogen in muscle tissue into lactic acid, while synthesizing others.^[7]

The Coris left Roswell in 1931 after publishing their work on carbohydrate metabolism. A number of universities offered Carl a position but refused to hire Gerty. Gerty was informed during one university interview that it was considered "unamerican" for a married couple to work together.^[2] They moved to St. Louis, Missouri in 1931, where Carl had been offered a research position at Washington University School of Medicine. Despite her research background, Gerty was only offered a position as a research associate at a salary one tenth of that received by her husband;^[10] she was warned that she might harm her husband's career.^[8] In 1943, she was made an associate professor of Research Biological Chemistry and Pharmacology. Months before she won the Nobel Prize, she was promoted to full professor, a post she held until her death in 1957.^[11]

They continued their collaboration at Washington University. While working with minced frog muscle, they discovered an intermediate compound that enabled the breakdown of glycogen, called glucose 1-phosphate, now known as the Cori ester.^[7] They established the compound's structure, identified the enzyme phosphorylase that catalyzed its chemical formation, and showed that the Cori ester is the beginning step in the conversion of the carbohydrate glycogen into glucose (large amounts of which are found in the liver).^[2] It can also be the last step in the conversion of blood glucose to glycogen, as it is a reversible step.^[12] Gerty Cori also studied glycogen storage disease, identifying at least four forms, each related to a particular enzymatic defect.^[13] She was the first to show that a defect in an enzyme can be the cause of a human genetic disease.^[14]

Gerty and Carl Cori collaborated on most of their work, including that which won them the 1947 Nobel Prize in Physiology or Medicine "for their discovery of the course of the catalytic conversion of glycogen". They received one half the prize, the other half going to the Argentinian physiologist, Bernardo Houssay "for his discovery of the part played by the hormone of the anterior pituitary lobe in the metabolism of sugar".^[15] Their work continued to clarify the mechanisms of carbohydrate metabolism, advancing understanding of the reversible conversion of sugars and starch, findings which proved crucial in the development of treatments for diabetics.^[2]

Awards and recognitions

In 1947 Gerty Cori became the third woman—and the first American woman—to win a Nobel Prize in science, the previous recipients being Marie Curie and Irène Joliot-Curie. She was the first woman to be awarded the Nobel Prize in Physiology or Medicine.^[17] She was elected a Fellow of the American Academy of Arts and Sciences in 1953.^[18]

The crater Cori on the Moon is named after her.^[19] So is the Cori crater on Venus.^[20] She also shares a star with Carl on the St. Louis Walk of Fame.^[21]

Correct formula for glucose-1-phosphate shown incorrectly on the US postage stamp

Cori was honored by the release of a US Postal Service stamp in April, 2008.^[22] The 41-cent stamp was reported by the Associated Press to have a printing error in the chemical formula for glucose-1-phosphate (Cori ester). The stamp is being distributed despite the error.^[23] Her description reads: "Biochemist Gerty Cori (1896–1957), in collaboration with her husband, Carl, made important discoveries—including a new derivative of glucose—that elucidated the steps of carbohydrate metabolism and contributed to the understanding and treatment of diabetes and other metabolic diseases. In 1947, the couple was award a half share of the Nobel Prize in Physiology or Medicine."^[24] The other scientists on the "American Scientists" sheet include Linus Pauling, chemist, Edwin Hubble, astronomer, and John Bardeen, physicist.

In 1948, Cori was awarded the Garvan-Olin Medal, an award that recognizes distinguished work in chemistry by American women chemists.^[25] She was appointed by President Harry S. Truman as board member of the National Science Foundation, a position she held until her death.^[11] She was elected to the National Academy of Sciences, the fourth woman so honored.^[26]

In 1949 she was awarded the Iota Sigma Pi National Honorary Member for her significant contribution.^[27]

In 2004 the research of Gerti and Carl Cori on carbohydrate metabolism was recognized by the American Chemical Society as a National Historic Chemical Landmark at the Washington University School of Medicine.^[2]

Final years

Just before winning the Nobel prize and while they were on a mountain climbing trip, the Coris learned that Gerty Cori was ill with myelosclerosis, a fatal disease of the bone marrow. She struggled for ten years with the illness while continuing her scientific work; only in the final months did she let up. In 1957, she died in her home.^[2] She was survived by her husband and their only child, Tom Cori who married the daughter of conservative activist Phyllis Schlafly.^[7][28][29]

See also

• List of female Nobel laureates
• List of Jewish Nobel laureates

References

Further reading

• Leroy, Francis (2003). A century of Nobel Prizes recipients: chemistry, physics, and medicine. CRC Press. ISBN 0-8247-0876-8. 
• McGrayne, Sharon Bertsch (2001). Nobel Prize Women in Science: Their Lives, Struggles and Momentous Discoveries. National Academy Press. ISBN 0-309-07270-0. 
• Opfell, Olga S (1978). The Lady Laureates : Women Who Have Won the Nobel Prize. Metuchen, N.J. & London: Scarecrow Press, Inc. pp. 183–193. ISBN 0810811618. 

External links

• Carl and Gerti Cori and Carbohydrate Metabolism from American Chemical Society National Historic Chemical Landmarks
• “Glories of the Human Mind” by Gerty Cori
• Bernardo A. Houssay Memorial to Gerty Theresa Cori
• Gerty Cori Memorabilia
• Nobel lecture by Carl Cori and Gerty Cori
• National Academy of Sciences Biographical Memoir