Richard E. Leach

인사말

Richard E. Leach교수

전문분야 |  Endometriosis and Infertility
Uterine Biology & Maternal Fetal Interactions

E – mail | Richard.Leach@hc.msu.edu

학력

Alma College, Alma MI B.S.
Wayne State University, Detroit, MI M.D.

주요경력

Positions and Employment

1988–1990 Clinical Instructor/Fellow, Dept. of Ob/Gyn, Mayo Graduate School of Medicine, Rochester, MN

1990–1998 Assistant Professor, Department of Ob/Gyn, Wayne State University School of Medicine, Detroit, MI

1998–2004 Associate Professor, Department of Ob/Gyn, Wayne State University School of Medicine, Detroit, MI

2003–2004 Vice Chairman, Department of Ob/Gyn, Wayne State University School of Medicine, Detroit, MI

2004 Professor, Department of Ob/Gyn, Wayne State University School of Medicine, Detroit, MI

2004–2007 Professor, Department of Ob/Gyn, University Illinois at Chicago School of Medicine, Chicago, IL

2004–2007 Director of Reproductive Endocrinology and Infertility, Department of Ob/Gyn, University Illinois at Chicago School of Medicine, Chicago, IL

2006–2007 Associate Head, Department of Ob/Gyn, University Illinois at Chicago School of Medicine

2007–Present Professor and Chair, Department of Obstetrics, Gynecology and Reproductive Biology, Michigan State University

2010–Present Chair, Department of Obstetrics and Gynecology, Spectrum Health Medical Group

Spectrum Health Systems, Grand Rapids, MI 49503

Honors (1999-present)

1999 National Institutes of Health Scholar Award, Detroit Women’s Reproductive Health Research Development Center Grant, Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI

2002 Outstanding Basic Scientist Award, Wayne State University School of Medicine, Detroit, MI

2002 Presentation to NIH/NICHD Council. “HB-EGF: a Marker of Human Implantation.” Bethesda, MD

2009 Best Scientific Paper; “Maternal Obesity Adversely Affects Assisted Reproductive Technology (ART) Pregnancy Rates and Obstetric Outcomes.” Annual Meeting of the American Society of Reproductive Medicine. November, 2009. Atlanta, GA.

주요연구내용

1. HBEGF: A Role in Human Implantation. The synchronous development of the endometrium during early implantation in women is highly dependent on embryonic-maternal signaling. We have shown that HB-EGF is secreted by the luminal epithelium of the human uterus during interval of implantation and is regulated in a spatiotemporal pattern in the endometrium by ovarian steroids estrogen and progesterone in the baboon. We discovered that HB-EGF stimulates human placenta villous explants to invade matrix at an accelerated rate by binding both HER-1 and HER-4 tyrosine kinase receptors. In collaboration with Randy Armant, PhD, from Wayne State University we are studying more closely the underlying molecular mechanisms that regulate HB-EGF expression and processing and its down stream control of trophoblast invasion and apoptosis.

2. HBEGF: A Role in Abnormal Human Implantation. We have shown that HB-EGF is absent in the placentas form women with preeclampsia. The cell invasion-promoting and antiapoptotic activities of HB-EGF place this molecule at a point of convergence of the pathophysiological abnormalities associated with early pregnancy loss: namely inadequate trophoblast invasion and excessive cell death. As a member (Project 4) of the U54 SCCPR (HD040093-0) centered at University of Illinois at Chicago (PI Asgi Fazleabas) we are studying how oxidative stress causes the dysregulation of trophoblast HB-EGF processing, invasion and apoptosis. Of significance, we can recapitulate the trophoblast phenotype found in some early pregnancy loss by in vitro exposure of trophoblast to hypoxia-reoxygenation.

3. Novel Human Implantation Genes that are Over-Expressed in Cancer. The human and mouse genome sequencing efforts are providing us with an opportunity to use species similarities as gene-function discovery tools. We have employed transcript profiling to characterize extra-embryonic trophoblast tissues during early human implantation. A cDNA library isolated from the ectoplacental cone region of 7.5 dpc staged mouse embryos was probed with cDNA from hypoxic cultured human trophoblast cells. This stage correlates to 20 days (Carnegie Stage 9) of human embryo development and cannot readily be studied for ethical and technical reasons. In total, 21 known and 9 unknown genes induced or attenuated in trophoblast cells after hypoxic treatment were identified. In collaboration with Steven Krawetz, PhD, from Wayne State University, we have focused on the characterization of OVCOV1 (ovarian cancer over expressed 1) since it is over expressed in ovarian cancer tissue. We are proceeding with studies to elucidate its function.

[논문]

http://www.ncbi.nlm.nih.gov/pubmed/?term=Leach+R.