The importance of oocyte-granulosa cell communication throughout oogenesis is well accepted. Members of the TGF-beta superfamily are important mediators of oocyte-granulosa cell communication, but the direct effect of these ligands on the oocyte is unclear. TGF-beta ligands activate SMAD proteins in target cells through phosphorylation. Activated SMADs (SMAD2/3 and 1/5/9) bind SMAD4 and translocate to the nucleus where they regulate nuclear functions. Based on preliminary analysis of mutant animals were the Smad4 gene is non-functional in oocytes, the present project tests the hypotheses that (1) Smad4 deletion in oocytes causes increased follicular development and (2) Smad4 mutant oocytes are more bioactive than control oocytes. Together, results from these two aims will provide valuable insight into mechanisms that affect oocyte development and may allow for development of interventions to improve oocyte quality and ovarian function.

Public Health Relevance

The proposed research activities will increase our understanding of ovarian function, follicular and oocyte development. This knowledge will improve our ability to treat problems associated with defects in female reproduction, including infertility, premature ovarian failure and irregular menstrual cycles.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Small Research Grants (R03)
Project #
1R03HD057283-01A1
Application #
8049865
Study Section
Pediatrics Subcommittee (CHHD)
Program Officer
Taymans, Susan
Project Start
2011-02-01
Project End
2013-01-31
Budget Start
2011-02-01
Budget End
2012-01-31
Support Year
1
Fiscal Year
2011
Total Cost
$73,700
Indirect Cost
Name
Pennsylvania State University
Department
Other Basic Sciences
Type
Schools of Earth Sciences/Natur
DUNS #
003403953
City
University Park
State
PA
Country
United States
Zip Code
16802