ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (5): 863-870.doi: 10.11843/j.issn.0366-6964.2017.05.010

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Effect of Food Restriction on the Expression of RGMb and BMP System Members in the Uterus of Hu Ewes

KUANG Mei-qian1, JIN Peng-jin1, WANG Ruo-cheng1, SUN Ling-wei2, WANG Feng2, LI Peng3, CHENG Zhi-jun3, MAO Da-gan1*   

  1. 1. College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;
    2. Jiangsu Engineering Technology Research Center of Mutton Sheep & Goat Industry, Nanjing 210095, China;
    3. Qidong Ruipeng Animal Husbandry Co., Ltd, Nantong 226227, China
  • Received:2016-12-01 Online:2017-05-23 Published:2017-05-23

Abstract:

The study aimed to explore the effects of food restriction on the expression of RGMb and BMP system members in the uterus of Hu ewes. Firstly, qPCR were applied to investigate the RGMb expression profile in different tissues of 3-month-old Hu ewes, IHC were used to detect the expression of RGMb in uterus. Then Hu ewes on 35 days of pregnancy (d35) were divided into 2 groups: ewes in the control (C) group were fed with 100% NRC and ewes in the restriction (R) group were fed with 50% NRC. On 110 days of pregnancy, uterine tissues (n=8) were collected to evaluate the expression of BMP2, BMP4, BMPR1A, BMPR1B, BMPR2 and RGMb by qPCR and WB. qPCR results showed that RGMb mRNA were detected in 14 tissues of 3-month-old Hu ewes, and the relative expression was greater than 0.5 in uterus. IHC staining showed that RGMb protein were mainly expressed in the endometrial luminal and glandular epithelial cells of Hu ewes. The uterine expression of RGMb protein in the R group was significantly lower (P<0.05) than that in the C group, while there was no significant differences in RGMb mRNA abundance(P>0.05). The expression of BMP4 and BMP2 mRNAs in the R group were higher (P<0.05) than those in the C group. However, the expression of BMP receptors(BMPR1A, BMPR1B and BMPR2) significantly decreased in the R group(P<0.05). The results indicate that food restriction affect the expression of BMP system members, including the RGMb, suggesting RGMb accompanied with BMP system may be involved in the regulation of uterine hemeostasis, which will set up experimental evidences for the further study on the regulation mechanism of BMP system in the uterus.

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