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John Albert Katzenellenbogen (born May 10, 1944) is an American Professor of Chemistry at the
University of Illinois at Urbana-Champaign The University of Illinois Urbana-Champaign (U of I, Illinois, University of Illinois, or UIUC) is a public land-grant research university in Illinois in the twin cities of Champaign and Urbana. It is the flagship institution of the Univ ...
. He studies the development of novel agents for the treatment of hormone-responsive and non-responsive
breast The breast is one of two prominences located on the upper ventral region of a primate's torso. Both females and males develop breasts from the same embryological tissues. In females, it serves as the mammary gland, which produces and secret ...
and
prostate cancer Prostate cancer is cancer of the prostate. Prostate cancer is the second most common cancerous tumor worldwide and is the fifth leading cause of cancer-related mortality among men. The prostate is a gland in the male reproductive system that sur ...
s and the design of
estrogen Estrogen or oestrogen is a category of sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics. There are three major endogenous estrogens that have estrogenic hormonal acti ...
s and
antiestrogen Antiestrogens, also known as estrogen antagonists or estrogen blockers, are a class of drugs which prevent estrogens like estradiol from mediating their biological effects in the body. They act by blocking the estrogen receptor (ER) and/or inhi ...
s that have a favorable balance of beneficial versus detrimental effects.


Early life

John Katzenellenbogen was born May 10, 1944, in
Poughkeepsie, New York Poughkeepsie ( ), officially the City of Poughkeepsie, separate from the Town of Poughkeepsie around it) is a city in the U.S. state of New York. It is the county seat of Dutchess County, with a 2020 census population of 31,577. Poughkeepsi ...
. His parents taught at
Vassar College Vassar College ( ) is a private liberal arts college in Poughkeepsie, New York, United States. Founded in 1861 by Matthew Vassar, it was the second degree-granting institution of higher education for women in the United States, closely follo ...
, his father a professor of Art History and his mother a pianist. In 1958, his family moved to
Baltimore, Maryland Baltimore ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by popula ...
, where his father became Head of the Department of Art History at
Johns Hopkins University Johns Hopkins University (Johns Hopkins, Hopkins, or JHU) is a private university, private research university in Baltimore, Maryland. Founded in 1876, Johns Hopkins is the oldest research university in the United States and in the western hem ...
and his mother joined the faculty at
Peabody Conservatory The Peabody Institute of The Johns Hopkins University is a private conservatory and preparatory school in Baltimore, Maryland. It was founded in 1857 and opened in 1866 by merchant/financier and philanthropist George Peabody (1795–1869) ...
and
Goucher College Goucher College ( ') is a private liberal arts college in Towson, Maryland. It was chartered in 1885 by a conference in Baltimore led by namesake John F. Goucher and local leaders of the Methodist Episcopal Church.https://archive.org/details/h ...
. Though he began playing the cello at age 10, his passion was for science. Katzenellenbogen attended
Gilman School Gilman School is an all-boys independent school located in the Roland Park neighborhood of Baltimore, Maryland. There are three school divisions: Lower School, grades pre-kindergarten through five; Middle School, grades six through eight; and Upp ...
and held various summer jobs: in 1960, he worked at the Research Institute for Advanced Studies in the photosynthesis lab of Dr. Bessel Kok, and, in 1961, he was a General Electric Student Research Fellow at
Union College Union College is a private liberal arts college in Schenectady, New York. Founded in 1795, it was the first institution of higher learning chartered by the New York State Board of Regents, and second in the state of New York, after Columbia Co ...
in
Schenectady, New York Schenectady () is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2020 census, the city's population of 67,047 made it the state's ninth-largest city by population. The city is in eastern New Y ...
. As an undergraduate at
Harvard Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher le ...
, he majored in Chemistry, going on to complete a PhD in Chemistry in 1969 at Harvard under the direction of Dr. E. J. Corey.


Career

Katzenellenbogen began his academic career as an Assistant Professor of Chemistry at the University of Illinois at Urbana-Champaign in 1969 and was promoted to Associate Professor in 1975 and to Full Professor in 1979. He was named the Roger Adams Professor and subsequently the chaired Swanlund Professor of Chemistry. He was one of the first academic chemists to work in the field of
chemical biology Chemical biology is a scientific discipline spanning the fields of chemistry and biology. The discipline involves the application of chemical techniques, analysis, and often small molecules produced through synthetic chemistry, to the study and ma ...
. His major research efforts have focused on the study of steroid hormones and their biological receptors, the
estrogen receptor Estrogen receptors (ERs) are a group of proteins found inside cells. They are receptors that are activated by the hormone estrogen ( 17β-estradiol). Two classes of ER exist: nuclear estrogen receptors (ERα and ERβ), which are members of the ...
in particular. Katzenellenbogen's research is highly collaborative, and he works with other scientists locally, nationally, and internationally. He has published more than 550 articles and has trained over 130 PhD's and Postdoctoral Associates. He is a member of the
American Association for the Advancement of Science The American Association for the Advancement of Science (AAAS) is an American international non-profit organization with the stated goals of promoting cooperation among scientists, defending scientific freedom, encouraging scientific respons ...
and a fellow of the
American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and ...
, on whose National Council he served for many years. He has received numerous awards from scientific societies, including the Arthur C. Cope Scholar Award, the E. B. Hershberg Award for Important Discoveries in Medicinally Active Substances from the American Chemical Society, the Endocrine Society's Fred Conrad Koch Lifetime Achievement Award, which he shared with Dr. Benita Katzenellenbogen, and the Award for Outstanding Achievements in Chemistry in Cancer Research from the American Association for Cancer Research In 2018, Katzenellenbogen was inducted into the Medicinal Chemistry Hall of Fame of the American Chemical Society.


Research

Katzenellenbogen developed the first
affinity label Affinity labels are a class of enzyme inhibitors that covalently bind to their target causing its inactivation. The hallmark of an affinity label is the use of a targeting moiety to specifically and reversibly deliver a weakly reactive group to the ...
for the estrogen receptor that was widely used to characterize its physical and biochemical properties, and he elucidated the metabolic activation of antiestrogens and characterized their sites of action. He also pioneered the development of positron emission tomography (PET) imaging agents for estrogen,
androgen An androgen (from Greek ''andr-'', the stem of the word meaning "man") is any natural or synthetic steroid hormone that regulates the development and maintenance of male characteristics in vertebrates by binding to androgen receptors. This inc ...
, and
progesterone receptor The progesterone receptor (PR), also known as NR3C3 or nuclear receptor subfamily 3, group C, member 3, is a protein found inside cells. It is activated by the steroid hormone progesterone. In humans, PR is encoded by a single ''PGR'' gene resid ...
s. The PET imaging agents he developed, FES, FDHT, and FFNP, continue to be utilized to improve the prediction of patient response to endocrine therapy agents and to assist in the development of new cancer therapeutics. His more recent work is focused on developing novel antiestrogens effective against endocrine therapy-resistant forms of breast cancer and dissecting the mechanisms and signaling pathways that underlie the selective actions of estrogens in different target tissues.


References

{{DEFAULTSORT:Katzenellenbogen, John 1944 births Living people Harvard Graduate School of Arts and Sciences alumni University of Illinois Urbana-Champaign faculty 21st-century American chemists People from Poughkeepsie, New York Scientists from Baltimore Scientists from New York (state) Harvard College alumni