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Regulation and regulatory role of WNT signaling in potentiating FSH action during bovine dominant follicle selection.

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Title Regulation and regulatory role of WNT signaling in potentiating FSH action during bovine dominant follicle selection.
Not Available
 
Creator Gupta PSP
Folger JK
Rajput S
Lv L,Yao J
Ireland JJ
Smith GW.
 
Subject WNT signaling in potentiating FSH
 
Description Not Available
Follicular development occurs in wave like patterns in monotocous species such as cattle and humans and is regulated by a complex interaction of gonadotropins with local intrafollicular regulatory molecules. To further elucidate potential mechanisms controlling dominant follicle selection, granulosa cell RNA harvested from F1 (largest) and F2 (second largest) follicles isolated at predeviation (PD) and onset of diameter deviation (OD) stages of the first follicular wave was subjected to preliminary RNA transcriptome analysis. Expression of numerous WNT system components was observed. Hence experiments were performed to test the hypothesis that WNT signaling modulates FSH action on granulosa cells during follicular waves. Abundance of mRNA for WNT pathway members was evaluated in granulosa cells harvested from follicles at emergence (EM), PD, OD and early dominance (ED) stages of the first follicular wave. In F1 follicles, abundance of CTNNB1 and DVL1 mRNAs was higher and AXIN2 mRNA was lower at ED versus EM stages and DVL1 and FZD6 mRNAs were higher and AXIN2 mRNA was lower in F1 versus F2 follicle at the ED stage. Bovine granulosa cells were treated in vitro with increasing doses of the WNT inhibitor IWR-1+/− maximal stimulatory dose of FSH. IWR-1 treatment blocked the FSH-induced increase in granulosa cell numbers and reduced the FSH-induced increase in estradiol. Granulosa cells were also cultured in the presence or absence of FSH +/− IWR-1 and hormonal regulation of mRNA for WNT pathway members and known FSH targets determined. FSH treatment increased CYP19A1, CCND2, CTNNB1, AXIN2 and FZD6 mRNAs and the stimulatory effect on CYP19A1 mRNA was reduced by IWR-1. In contrast, FSH reduced CARTPT mRNA and IWR-1 partially reversed the inhibitory effect of FSH. Results support temporal and hormonal regulation and a potential role for WNT signaling in potentiating FSH action during dominant follicle selection.
Not Available
 
Date 2018-11-18T16:08:05Z
2018-11-18T16:08:05Z
2014-06-14
 
Type Research Paper
 
Identifier Gupta PSP, Folger JK, Rajput S, Lv L,Yao J, Ireland JJ and Smith GW. 2014. Regulation and regulatory role of WNT signaling in potentiating FSH action during bovine dominant follicle selection. PLoS One, 9: e100201.
1553-7358
http://krishi.icar.gov.in/jspui/handle/123456789/11834
 
Language English
 
Relation Not Available;
 
Publisher Not Available