ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (11): 2409-2415.doi: 10.11843/j.issn.0366-6964.2018.11.012

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Effects of Autonomic Nerve on Mast Cell and Histamine Content in Rat Uterus during Peri-implantation

HUANG Li-bo1, ZHANG Xiu-xia2, FAN Xiao-jie2, HOU Yan-meng1, JIANG Shu-zhen1, LU Xuan1, YUAN Xue-jun3*   

  1. 1. Shandong Livestock and Poultry Disease Prevention and Control Engineering Technology Research Center, Shandong Key Laboratory of Animal Bioengineering and Disease Prevention and Control, College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
    2. Shandong Academy of Agricultural Sciences, Ji'nan 250014, China;
    3. College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
  • Received:2018-01-30 Online:2018-11-23 Published:2019-01-23

Abstract:

The objective of this study was to explore the relationship between autonomic nerve and cellular immune in uterus during peri-implantation based on mast cell (MC) count and histamine content. Ninety healthy female Wistar rats weighed 300-350 g were randomly assigned into 3 groups. One group as neurectomy (the autonomic nerves governing the uterus from the pelvis nerve and mesenteric caudal ganglion were amputated by surgical operation before pregnancy) experiment group, one group as sham operation group and the other as the control. After fully recovering from the surgery, female rat was cohabited with male rat in ovulatory period. On day 4, 5, 6 of pregnancy(d4, d5, d6), the females were killed by neck dislocation, uteri and ovary were surgically removed in abacterial condition. The number of ovulation sites was observed under an anatomy microscope and the quantity of embryos was counted, MC count was determined by cell staining, and histamine was assayed using histamine ELISA kits. The results showed that the spontaneous release and content of histamine in the uterus of normal rats were the lowest level at the time of implantation (d5). The MC count presented the similar changes to histamine. Compared with the control, spontaneous release of histamine from uterus in operated rat showed a significant decrease at d4, d6 of pregnancy (P<0.05), amputation of the nerve innerving uterus very significantly decreased the total content of histamine (P<0.01) before embryo implantation (d4), meanwhile the number of implanted embryo was also markedly decreased or delay. There were similar changes in the number of uterine MC and histamine content during implantation after neurectomy. These results suggested that resection of the nerve innerving uterus decreased MC counts and histamine level in the period of pre-implantation, changed uterine local immunity level, leading to reduction or delay of implantation. Taken together, our results imply that the autonomic nerve innerving uterus can up-regulate the local immune level in the the uterus through the proliferation of MC and histamine releasing, and play an important regulating role in embryo implantation.

Key words: rats, uterus, autonomic nerve, mast cell, histamine

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