vasohibin 1 OKDB#: 4640
 Symbols: VASH1 Species: human
 Synonyms: KIAA1036,  Locus: 14q24.3 in Homo sapiens

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General Comment
General function Ligand
Cellular localization Secreted
Ovarian function Luteinization
Expression regulated by Growth Factors/ cytokines, VEGF
Ovarian localization
Follicle stages Corpus luteum
Comment Possible action of vasohibin-1 as an inhibitor in the regulation of vascularization of the bovine corpus luteum. Shirasuna K et al. The development of the corpus luteum (CL), which secretes large amounts of progesterone to establish pregnancy, is accompanied by active angiogenesis, vascularization and lymphangiogenesis. Negative feedback regulation is a critical physiological mechanism. Vasohibin-1 (VASH1) was recently discovered as a novel endothelium-derived negative feedback regulator of vascularization. We therefore investigated the expression of VASH1 in the bovine CL. Expression of VASH1 mRNA and protein was predominantly localized to luteal endothelial cells (LECs). VASH1 expression in the CL was constant through the early to late luteal phases and decreased during CL regression relating with the action of luteolytic PGF2a in vivo. To investigate the role of VASH1, we determined whether VASH1 treatment affects angiogenesis and/or lymphangiogenesis using LECs and lymphatic endothelial cells (LyECs) in vitro. Vascular endothelial growth factor A (VEGFA) stimulated the expression of VASH1 in LECs but not in LyECs, and VASH1 completely blocked VEGFA-induced formation of capillary-like tube structures of LECs and LyECs in vitro. In summary, VASH1 is predominantly located on LECs in the bovine CL and inhibits the angiogenic and lymphangiogenic actions of VEGFA. Bovine CL therefore has a VEGFA-VASH1 system that may be involved in regulation of luteal function, especially the development of the CL. The results indicate that VASH1 has the potential to act as a negative feedback regulator of angiogenesis and lymphangiogenesis in the CL in cows.
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created: 2012-03-07 10:36:32 by: Aaron J Hsueh, hsuehlab   email:
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last update: 2012-03-07 10:38:11 by: Aaron J Hsueh, hsuehlab   email:

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