Effect of hypoxia on progesterone production by cultured bovine early and mid luteal cells

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Abstract

<p> A major role of the corpus luteum (CL) is to produce progesterone (P4). The CL has immature vasculature shortly after ovulation, suggesting it exists under hypoxic conditions. To elucidate the mechanism involved in regulation of luteal cell function during CL development, we compared the effect of hypoxia on P4 production by cultured bovine early and mid luteal cells. Luteal cells obtained from early and mid CL were incubated under different O<sub>2</sub> concentrations (20% and 3%) with or without hCG (1 U/ml) for 6 h and 24 h. After 6 h of culture in the presence of hCG, P4 production was not affected by hypoxia whereas decrease in its production by mid luteal cells was observed. After 24 h of culture, P4 production was significantly decreased by hypoxia in both stages of luteal cells regardless of the use of hCG. At 6 h of culture, hypoxia increased mRNA expression of hydroxyl-Δ-5-steroid dehydrogenase, 3β- and steroid Δ-isomerase 1 (<i>HSD3B1)</i> in early luteal cells, and decreased mRNA expression of cytochrome P450 cholesterol side chain cleavage (<i>CYP11A1)</i> enzyme in mid luteal cells. At 24 h of culture, mRNA expressions of steroidogenic acute regulatory protein (<i>STAR)</i>, <i>CYP11A1</i>, and <i>HSD3B1</i> were not affected by hypoxia in both stages of luteal cells. The overall results suggest that early luteal cells maintain P4 production under hypoxic conditions, and hypoxia-induced HSD3B1 may support this P4 production in the bovine early CL.</p>

Journal

  • Journal of Reproduction and Development

    Journal of Reproduction and Development 65(1), 67-72, 2019

    Society for Reproduction and Development

Codes

  • NII Article ID (NAID)
    130007591420
  • NII NACSIS-CAT ID (NCID)
    AA10936678
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0916-8818
  • NDL Article ID
    029510938
  • NDL Call No.
    Z54-H305
  • Data Source
    NDL  IR  J-STAGE 
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