Social dominance-related major urinary proteins and the regulatory mechanism in mice

Integrative Zoology
Huifen GuoJianxu Zhang

Abstract

Major urinary proteins (MUPs) have been proven to be non-volatile male pheromones in mice. Here, we aimed to elucidate the relationship between MUPs and dominance hierarchy, and the underlying molecular mechanisms. Dominance-submission relationship was established by chronic dyadic encountering. We found that at the urinary protein level and hepatic mRNA level, the expression of major MUPs, including Mup20, was enhanced in dominant males compared with subordinate males, indicating that MUPs might signal the social status of male mice. Meanwhile, the mRNA level of hepatic corticotropin releasing hormone receptor 2 (CRHR2) was higher in subordinate male mice than in dominant male mice. Castration also enhanced the expression of CRHR2, but suppressed that of MUPs. CRHR2 agonist treatment reduced the expression of MUPs in liver. However, male social status failed to exert significant influence on serum testosterone and corticosterone as well as the mRNA expression of their receptors. These findings reveal that some MUPs, especially Mup20, might constitute potential dominance pheromones and could be downregulated by hepatic CRHR2, which is possibly independent of androgen or corticosterone systems.

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Citations

Jun 11, 2016·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Qi FangJian-Xu Zhang
Dec 7, 2016·Scientific Reports·Michaela ThoßDustin J Penn
Jan 12, 2017·Chemical Senses·Ying-Juan LiuJian-Xu Zhang
Oct 31, 2018·Genes, Brain, and Behavior·Marie H Monfils, Laura A Agee
Sep 22, 2017·Proceedings. Biological Sciences·Won LeeJames P Curley
Feb 28, 2018·Frontiers in Zoology·Xiao GuoJian-Xu Zhang
Sep 4, 2015·Integrative Zoology·Huifen GuoJianxu Zhang

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