Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (1): 202-209. doi: 10.7668/hbnxb.20193290

Special Issue: Animal husbandry Hot Article

• Animal Husbandry·Fisheries·Veterinarian • Previous Articles     Next Articles

The Mechanism of HIF-1α in Migration and Invasion of Dairy Cow Placental Trophoblast Cells

SU Yue1, GUO Yong1, GAO Yuping2, XIAO Longfei1, LIAO Chenxing3, QI Xiaolong1, SHENG Xihui1, XING Kai1, WANG Xiangguo1, , NI Hemin1,   

  1. 1 Animal Science and Technology College,Beijing University of Agriculture,Beijing 102206,China
    2 Tianjin Jizhou District People's Government of Xiacang Town,Tianjin 301905,China
    3 Beijing Sanyuan Seed Technology Co.,Ltd.,Beijing 100076,China
  • Received:2022-07-15 Published:2023-02-28

Abstract:

To investigate the effect of HIF-1α on the migration and invasion of trophoblast cells in placenta of dairy cows affected by cobalt dichloride(CoCl2),and reveal the formation mechanism of placenta of dairy cows under hypoxia conditions,bovine placental trophoblast cells(BTCs)were isolated and purified from the placenta of early pregnancy cows.The cell morphology was observed by giemsa staining method,and the expression of cell markers cytokeratin 7(CK7)and Thy/CD90 were detected by immunofluorescence method.pCI-neo-hTERT plasmid was then transfected into BTCs,qPCR and Western Blot methods were used to detect the TERT mRNA and protein expression in BTCs.Proliferation rate and placental lactogen(PL)secretory ability were analyzed with CCK8 method and ELISA,respectively.siRNA was further used to silence the expression of Hypoxia inducible factor-1α(HIF-1α),vascular endothelial growth factor A(VEGFA)secretion ability in BTCs was detected by ELISA and the ability of migration and invasion of BTCs was detected by scratch test and transwell.According to the above all results,the isolated and purified BTCs were typical epithelioid cells with a certain number of binucleated cells and expressed epithelial marker protein CK7,but Thy/CD90 expression was not observed.The transfected cells could stably express telomerase reverse transcriptase(TERT)mRNA and protein.No cell aging was observed after 50 generations of continuous passage,and the proliferation rate was significantly higher than these primary BTCs(P<0.05),and the PL secretion ability showed no significantly different from that of primary BTCs(P>0.05).The cell viability of BTCs treated with CoCl2 decreased with the increase of CoCl2 concentration and time(P<0.05),and HIF-1α mRNA and protein expression decreased with the increase of CoCl2 concentration(P<0.05).BTCs was treated with 400 μmol/L CoCl2 for 24 h to establish a hypoxia model,and VEGFA secretion and invasion ability were significantly increased under BTCs hypoxia(P<0.05),while HIF-1α silencing decreased VEGFA secretion and invasion ability of BTCs(P<0.05).In conclusion,immortalized BTCs was established through exogenous TERT gene transduction.The immortalized BTCs had similar biological characteristics to the primary cells,and have stronger VEGFA secretion and invasion ability under hypoxia condition,and were associated with HIF-1α up-regulation.

Key words: Dairy cows, Trophoblasts, Hypoxia, Migration, Invasion, HIF-1α

Cite this article

SU Yue, GUO Yong, GAO Yuping, XIAO Longfei, LIAO Chenxing, QI Xiaolong, SHENG Xihui, XING Kai, WANG Xiangguo, NI Hemin. The Mechanism of HIF-1α in Migration and Invasion of Dairy Cow Placental Trophoblast Cells[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(1): 202-209. doi: 10.7668/hbnxb.20193290.

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