Richard L. Stouffer
A major unanswered question in reproductive research is which factors control the cyclic activity of the ovary. The female ovarian or menstrual cycle lasts 28 days. In the first half of the cycle, one follicle is selected to mature and release an egg for possible fertilization in the reproductive tract; in the second half, the follicle wall is converted into the corpus luteum - an endocrine gland that secretes the hormone progesterone that is vital for the initiation and maintenance of pregnancy.
Richard Stouffer and his associates investigate the factors controlling the growth and ovulation of the mature follicle at midcycle, as well as development of the corpus luteum from the ovulatory follicle and its function until the end of the menstrual cycle or into early pregnancy. Studies on intact monkeys and research on isolated ovarian tissues and cells are unraveling the complex interaction between substances produced within the ovary (e.g., progesterone and angiogenic factors) and those coming from other organs (gonadotropins from the pituitary gland and placenta) in controlling the ovulatory follicle and corpus luteum.
Stouffer's discovery that progesterone-producing cells within the ovulatory follicle and corpus luteum also contain progesterone receptors led to research identifying an essential role for this steroid hormone within the ovary for follicle rupture and release of the egg, and for development of the corpus luteum. Molecular and cellular approaches are being applied to identify genes and their products that are essential for ovulation of the follicle, conversion of the follicle into the corpus luteum, and extension of luteal structure-function into early pregnancy. In vitro and in vivo (animal) experiments are testing which genes are regulated by hormones or local factors, and if gene products or pharmaceutical antagonists have potential of novel contraceptive agents for women.
Stouffer’s group is also working with a consortium of scientists from OHSU, University of Pittsburgh and University of California, Los Angeles, to investigate the effects of chronic androgen exposure with or without a typical western-style (high fat) diet, on reproduction and metabolism of young adult, female monkeys. The goal is to determine if these experimental manipulations result in changes reminiscent of those seen in adolescent girls at risk for polycystic ovarian syndrome, and hence provide insight into the causes and possible treatment of this common infertility disorder in women.
This research is directly relevant to continued efforts to improve the clinical approaches to treating infertility and high-risk pregnancy, and to develop new methods of contraception. New information will also aid in the preservation of nonhuman primates through assisted reproductive techniques, such as in vitro fertilization.
Richard Stouffer is Senior Scientist and former Chief of the Division of Reproductive & Developmental Sciences, and Professor of Obstetrics & Gynecology, and Physiology & Pharmacology in the OHSU School of Medicine. He is ONPRC director of the NIH-sponsored and newly named National Center for Translational Research on Reproduction and Infertility (NCTRI) at OHSU. The center formerly known as the Specialized Cooperative Center Program for Infertility and Reproduction Research at OHSU, which is part of a network of 12 centers in the United States. He is also co-director of the NIH-sponsored Contraceptive Development & Research Center at OHSU, which networks with 3 other centers in the U.S.A. He earned a Ph.D. in physiology/pharmacology from Duke University Medical School in 1975. After two years as a staff research fellow in the Reproductive Research Branch, National Institute of Child Health and Human Development, Dr. Stouffer became an Assistant Professor of Physiology at the University of Arizona Health Sciences Center, where he remained until his 1985 appointment at ONPRC, OHSU.
Peluffo, MC, Stanley, J, Braeuer, N, Rotgeri, A, Fritzemeier, KH, Fuhrmann, U, Buchmann, B, Adevai, T, Murphy, MJ, Zelinski, MB, Lindenthal, B, Hennebold, JD, and Stouffer, RL. (2014) A prostaglandin E2 receptor antagonist prevents pregnancies during a preclinical contraceptive trial with female macaques. Hum Reprod 29:1400-1412. PMC4059334
Stouffer, RL, Bishop, CV, Bogan, RL, Xu, F, and Hennebold, JD. (2013) Endocrine and local control of the primate corpus luteum. Reprod Biol 13, 259-271. PMC4001828
Xu J, Xu M, Bernuci MP, Fisher TE, Shea LD, Woodruff TK, Zelinski MB, Stouffer RL. (2013) Primate follicular development and oocyte maturation in vitro. In: Kim S (eds.), Oocyte Biology in Fertility Preservation, Adv Exp Med Biol, 761:43-67. PMC4007769
McGee WK, Bishop CV, Bahar A, Pohl CR, Chang RJ, Marshall JC, Pau FK, Stouffer RL, Cameron JL. (2012) Elevated androgens during puberty in female rhesus monkeys lead to increased neuronal drive to the reproductive axis: a possible component of polycystic ovary syndrome. Hum Reprod, 27:531-540. PMC3258033
See a full listing of Dr. Stouffer's publications