Study on the relationship between expression patterns of ... - SciELO
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Study on the relationship between expression patterns of ... - SciELO
Abstract. Background: Cocaine-and amphetamine regulated transcript (CART) is an endogenous ... GnRH release can be blocked by CART protein antibody.
Li et al. Biol Res (2018) 51:6 https://doi.org/10.1186/s40659-018-0154-y
RESEARCH ARTICLE
Biological Research Open Access
Study on the relationship between expression patterns of cocaine‑and amphetamine regulated transcript and hormones secretion in porcine ovarian follicles Pengfei Li1, Jinzhu Meng2, Jiongjie Jing3, Qingling Hao1, Zhiwei Zhu1, Jianbo Yao3,4 and Lihua Lyu3*
Abstract Background: Cocaine-and amphetamine regulated transcript (CART) is an endogenous neuropeptide, which is widespread in animals, plays a key role in regulation of follicular atresia in cattle and sheep. Among animal ovaries, CART mRNA was firstly found in the cattle ovaries. CART was localized in the antral follicles oocytes, granulosa and cumulus cells by immunohistochemistry and in situ hybridization. Further research found that secretion of E 2 was inhibited in granulosa cells with a certain dose of CART, the effect depends on the stage of cell differentiation, suggesting that CART could play a crucial role in regulating follicle atresia. The objective of this study was to characterize the CART expression model and hormones secretion in vivo and vitro in pig follicle granulosa cells, preliminarily studied whether CART have an effect on granulosa cells proliferation and hormones secretion in multiparous animals such as pigs. Methods: The expression levels of CART mRNA in granulosa cells of different follicles were analyzed using qRT-PCR technology. Immunohistochemistry technology was used to localize CART peptide. Granulosa cells were cultured in medium supplemented with different concentrations of CART and FSH for 168 h using Long-term culture system, and observed using a microscope. The concentration of Estradiol (E2) and progesterone (P) in follicular fluids of different test groups were detected by enzyme linked immunosorbent assay (ELISA). Results: Results showed that expression level of CART mRNA was highest in medium follicles, and significantly higher than that in large and small follicles (P 5 mm), medium (3 mm
