China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (11): 3555-3562.doi: 10.16431/j.cnki.1671-7236.2020.11.017

• Genetics and Breeding • Previous Articles     Next Articles

Mechanism of C-type Natriuretic Peptide Regulating Lipid Deposition of Intramuscular Adipocytes in Chickens

HUANG Huayun1, LIANG Zhong1, LIU Longzhou1,2, ZHAO Zhenhua1, WANG Qianbao1, LI Chunmiao1, HUANG Zhenyang1, ZHANG Xin1,3, LI Shoufeng1   

  1. 1. Jiangsu Institute of Poultry Science, Yangzhou 225125, China;
    2. Yangtze University, Jingzhou 434025, China;
    3. Yangzhou University, Yangzhou 225009, China
  • Received:2020-06-01 Online:2020-11-20 Published:2020-11-20

Abstract: The aim of this study was to investigate the regulatory effect and mechanism of C-type natriuretic peptide (CNP) on the proliferation,differentiation and lipolysis of intramuscular preadipocytes (IMPs) in breast muscle of chickens,and lay a foundation on further elucidating the molecular mechanism of intramuscular fat deposition in chickens.The IMPs of breast muscle in Yellow-feathered broilers were used as the model in vitro,the preadipocytes were induced by 10-7 mol/L CNP.The proliferation,differentiation and lipolysis of IMPs were observed by CCK8,Edu staining,Oil Red O staining and isopropanol extraction,respectively.The concentration of cGMP and glycerin were detected by cGMP and glycerin kit,respectively.The expression of NPRA,NPRB and NPRC genes mRNA was detected by Real-time quantitative PCR.The results showed that compared with control group,the cell proliferation in CNP treatment group was enhanced significantly at 1 and 3 d (P<0.05).The cell differentiation and lipid deposition were extremely significantly decreased at 3 and 6 d (P<0.01),the intracellular cGMP concentration and glycerin concentration in the medium at 3 and 6 d were extremely significantly increased (P<0.01).The expression of NPRB and NPRC genes mRNA in CNP treatment group was extremely significantly or significantly higher than control group (P<0.01;P<0.05),and the expression of NPRA gene mRNA had no significant difference (P>0.05).The results revealed that CNP regulated the lipid deposition of intramuscular adipocytes through NPRB/NPRC-cGMP pathway in chickens.

Key words: C-type natriuretic peptide (CNP); chickens; intramuscular adipocytes; lipid deposition

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