China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (7): 2622-2630.doi: 10.16431/j.cnki.1671-7236.2022.07.020

• Genetics and Breeding • Previous Articles     Next Articles

Effects of Exogenous MLT and RFRP-3 on Growth and Reproductive Performance of Male Mice at the Puberty

PAN Jianqiu1,2,3, LIUFU Sui2,3, WU Manli2, JIANG Danli2,3, OUYANG Hongjia2,3, SHEN Xu2,3, XU Danning2,3, HE Jianhua1, HUANG Yunmao2,3   

  1. 1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    2. College of Animal Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
    3. Guangdong Key Laboratory of Waterfowl Health Breeding,Guangzhou 510225, China
  • Received:2021-11-17 Online:2022-07-05 Published:2022-06-29

Abstract: 【Objective】 This experiment was conducted to investigate the effects of exogenous RF-amides related peptide 3 (RFRP-3) and melatonin (MLT) on the growth and reproductive performance of male Kunming mice at the beginning of estrus,and the relationship between them.【Method】 Male Kunming mice at the beginning of estrus were given normal saline,exogenous RFRP-3,MLT,and a mixture of RFRP-3 and MLT,respectively.The effects on average weight gain,average feed intake,feed gain ratio (F/G),testicular development,the secretion levels of serum growth hormone (GH) and luteinizing hormone (LH),and the relative expression of growth and reproduction-related genes in mice were examined.【Result】 Exogenous RFRP-3 inhibited the expression of GH gene,suppressed body weight gain,and improved F/G;While exogenous MLT promoted the expression of GH gene,resulting in faster body weight growth and lower F/G.Under the combined treatment of RFRP-3 and MLT,the expression of GH gene increased,and the body weight gain was similar to that of MLT group.RFRP-3 inhibited the expression of melatonin receptor 1A (Mtnr1A) and LH genes and the secretion of testosterone,and the number of spermatogonia at all levels and leydig cells in the testes of mice decreased;MLT promoted the expression of Mtnr1A and LH genes and the secretion of testosterone,and the leydig cell density extremely significantly increased (P<0.01).The MLT and RFRP-3 cotreatment decreased the number of spermatogonia and leydig cells,and significantly decreased the secretion of testosterone (P<0.05).【Conclusion】 Exogenous RFRP-3 inhibited the growth and reproductive performance of male mice at the puberty,while exogenous MLT promoted the growth and reproductive performance of male mice.

Key words: RFRP-3 gene; MLT gene; male mice; growth performance; reproductive performance

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