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Effect of Oaz1 overexpression on goose ovarian granulosa cells

Bo Kang1, Dongmei Jiang2, Hui He3

  • 1College of Animal Science and Technology, Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China. bokang@sicau.edu.cn.

Amino Acids
|March 22, 2017
PubMed

Insights

Ornithine decarboxylase antizyme 1 (OAZ1) overexpression in goose granulosa cells alters polyamine levels and impacts cell proliferation, apoptosis, and hormone receptor gene expression.

Area of Science:

  • Reproductive biology and molecular endocrinology.
  • Cellular and molecular mechanisms of polyamine metabolism.
  • Ovarian cell function and gene regulation.

Background:

  • Ornithine decarboxylase antizyme 1 (OAZ1) is a key regulator of polyamine metabolism and has known tumor suppressor functions.
  • The specific roles of OAZ1 in goose granulosa cells (GCs) regarding polyamine metabolism, cell proliferation, apoptosis, and hormone receptor expression remain undefined.
  • Understanding OAZ1's function in GCs is crucial for comprehending ovarian physiology and reproductive processes in geese.

Purpose of the Study:

  • To investigate the functional roles of OAZ1 in primary goose granulosa cells.
  • To determine the effects of OAZ1 overexpression on polyamine metabolism, cell proliferation, apoptosis, and hormone receptor expression in GCs.
  • To elucidate the molecular mechanisms by which OAZ1 influences GC function and gene expression.

Main Methods:

  • Construction and transfection of an Oaz1 overexpression vector into primary goose GCs.
  • Quantification of intracellular polyamine content (putrescine, spermidine, spermine) using biochemical assays.
  • Measurement of mRNA expression levels for genes involved in polyamine metabolism, cell proliferation (Ccnd1, Pcna), apoptosis (Bax, Caspase 3), and hormone receptors (Er, Fshr, Lhr) via RT-qPCR.
  • Analysis of estradiol (E2) concentration in the culture medium.

Main Results:

  • Oaz1 overexpression significantly decreased putrescine and spermidine levels while increasing spermine content, disrupting polyamine homeostasis.
  • Up-regulation of genes related to polyamine metabolism (excluding Oaz2) was observed.
  • Enhanced expression of cell proliferation (Ccnd1, Pcna) and apoptosis (Bax, Caspase 3) related genes was noted.
  • A slight increase in E2 concentration and enhanced expression of estrogen receptor (Er), follicle-stimulating hormone receptor (Fshr), and luteinizing hormone receptor (Lhr) were detected.

Conclusions:

  • OAZ1 overexpression in goose GCs alters intracellular polyamine homeostasis and affects the expression of genes involved in cell proliferation and apoptosis.
  • OAZ1 influences the expression of key reproductive hormone receptors (Er, Fshr, Lhr) in goose GCs.
  • Modulation of polyamine metabolism by OAZ1 can interfere with gene expression related to ovarian hormone responsiveness and cellular processes in goose GCs.
Keywords:
ApoptosisCell proliferationGranulosa cellOrnithine decarboxylase antizyme 1Polyamine metabolism

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