RGD Reference Report - Stage-specific expression of Smad2 and Smad3 during folliculogenesis. - Rat Genome Database

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Stage-specific expression of Smad2 and Smad3 during folliculogenesis.

Authors: Xu, J  Oakley, J  McGee, EA 
Citation: Xu J, etal., Biol Reprod 2002 Jun;66(6):1571-8.
RGD ID: 727374
Pubmed: PMID:12021033   (View Abstract at PubMed)

Paracrine and autocrine growth factors can affect many different aspects of ovarian follicle development. Many members of the transforming growth factor beta (TGFbeta) family of growth factors and their receptors are expressed in developing follicles. However, the presence and function of the family of the TGFbeta signaling molecules known as Smads have not been evaluated during follicle development. We have demonstrated that two Smad family members that function as mediators for both activin and TGFbeta are expressed in granulosa cells of preantral follicles but not in large antral follicles. Smad2 expression, but not Smad3 expression, returns in luteal cells. Both Smad2 and Smad3 are translocated to the nucleus of granulosa cells in response to treatment with either TGFbeta or activin. However, Smad2 is more responsive to activin stimulation, and Smad3 is more responsive to TGFbeta stimulation. Stage-specific expression and differing ligand sensitivity of signaling molecules may work together to allow different effects of TGFbeta family ligands using the same signaling pathways over the course of follicular development.

Objects referenced in this article
Gene Smad2 SMAD family member 2 Rattus norvegicus
Gene Smad3 SMAD family member 3 Rattus norvegicus

Additional Information