Neutralization of vascular endothelial growth factor antiangiogenic isoforms is more effective than treatment with proangiogenic isoforms in stimulating vascular development and follicle progression in the perinatal rat ovary.

ABSTRACT: Inhibition of vascular endothelial growth factor A (VEGFA) signal transduction arrests vascular and follicle development. Because antiangiogenic VEGFA isoforms are proposed to block proangiogenic VEGFA isoforms from binding to their receptors, we hypothesized that proangiogenic isoforms promote and antiangiogenic isoforms inhibit these processes. The antiangiogenic isoforms Vegfa_165b and Vegfa_189b were amplified and sequenced from rat ovaries. The Vegfa_165b sequence was 90% homologous to human VEGFA_165B. Quantitative RT-PCR determined that Vegfa_165b mRNA was more abundant around Embryonic Day 18, but Vegfa_189b lacked a distinct pattern of abundance. Antiangiogenic VEGFA isoforms were localized to pregranulosa and granulosa cells of all follicle stages and to theca cells of advanced-s

SUBMITTER: Artac RA 

PROVIDER: S-EPMC2770023 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature