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Woodruff Lab

Research Summary: Regulation of Ovarian Follicle Growth during the Mammalian Reproductive Cycle

The primary goal of the laboratory is to understand the biological, cellular, and molecular mechanisms that regulate the reproductive axis. Hormones and locally produced growth factors of the gonads, pituitary, and hypothalamus interact to maintain reproductive cyclicity in the female and tonic sperm production in the male. The integration of endocrine, paracrine, and autocrine signals provides the precision demanded by nature to maintain the germ line of the species.

The study of normal reproduction function requires measurement of fluctuating hormone levels, identification of local factors involved in reproductive management, and an understanding of the signaling mechanisms that cue cellular action. Diseases involving reproductive systems include infertility (male and female), polycystic ovarian disease, endometriosis, premature ovarian failure, preterm labor and delivery, and ovarian, breast, testicular, and prostate cancer.

The specific focus of the laboratory at this time is the female reproductive axis. Our approach requires an integrated view of the axis as a whole; however, emphasis is placed on ovarian-regulated events. We seek to understand the hormonal signals produced by the ovaries, the mechanics of follicular growth, the hormonal and neuronal effectors of follicle selection and maturation, the factors involved in the development of oocytes, the events surrounding follicle wall rupture and wound healing, and the interplay between oocyte and somatic cells. Our scientific approach toward an understanding of ovarian-directed reproductive events is to identify and study factors produced by the ovary which regulate local and distal events.

Two follistatin 288 molecules (blue and green) engulfing an activin A homodimer (red).  Follistatin covers the type I and type II receptor binding sites on activin, providing a high affinity interaction, and potent method for abrogation of activin activity. 

.The interaction site of the activin bA subunit (red) and the type II receptor ActRIIB extracellular domain (blue).  Amino acids on ligand (yellow) and receptor (green) reflect the hydrophobic nature of the interaction.  Activin binding to ActRIIB at the cell plasma membrane allows for recruitment of the type I receptor ALK4, and subsequent intracellular signaling through phosphorylation of Smad proteins.


Basic Science Division of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University

The Division of Basic Sciences of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University, which is led by Dr. Woodruff, facilitates research collaborations and encourages cancer-related research. The faculty of the Basic Research Division investigate all aspects of cell function: from misappropriated extracellular matrix to nuclear transcription factors, from biomaterials to cutting edge imaging techniques, and from prognostics and diagnostics to therapeutics. The Cancer Center provides support to make Northwestern University a unique environment for breakthroughs in our understanding of normal cellular processes and high impact investigations--leading to better and longer lives for all of us.

       
Center for Reproductive Research
Dr. Woodruff is Director of one of the National Institute's of Heatlth's Specialized Cooperative Centers Program in Reproduction Research.

 

     
 
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