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Effect of FH535 on in vitro maturation of porcine oocytes by inhibiting WNT signaling pathway

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Wingless‐int (WNT) signaling pathway is vital to modulate life processes, including cell fate determination, cell differentiation, cell proliferation, cell apoptosis and embryogenesis. To demonstrate the uncertain effect of the canonical WNT signaling pathway on oocyte maturation, immature porcine oocytes were collected and cultured in vitro with the WNT/β‐catenin inhibitor FH535. The concentrations of FH535 were selected as 0.00, 0.01, 0.10, 1.00 and 10.00 μmol/L. The results showed that the optimum concentration of FH535 on oocyte maturation was 1.00 μmol/L. In this concentration, the proportion of MII oocytes increased (< 0.05). The rate of cleavage was the same with the control (P > 0.05), while the rate of blastocysts in the 1.00 μmol/L FH535 treated group was higher than that of control (P < 0.01). Additionally, the average number of nuclei in blastocysts raised significantly (P < 0.05). The inhibition of WNT could regulate expression of maturation‐related genes, including Cdc‐2, Bmp‐15, Gdf‐9 and Mos. In the 1.00 μmol/L FH535 treated group, the messenger RNA level of β‐catenin showed no significant change compared to the control (P > 0.05), but the protein abundance was decreased (P < 0.05). This study revealed that the inhibition of FH535 on the WNT signaling pathway could promote the maturation of porcine oocytes and altered gene expressions in vitro.
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Keywords: FH535; WNT signaling; maternal genes; oocyte maturation; β‐catenin

Document Type: Research Article

Publication date: April 1, 2018

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