Complex chemosensory control of female reproductive behaviors.

Complex chemosensory control of female reproductive behaviors.
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DOI:
10.1371/journal.pone.0090368
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Shah NM
Shah NM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fraser EJ;Shah NM

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嗅觉对包括啮齿动物在内的许多动物的生殖生理和行为产生深远的影响。在小鼠和许多其他脊椎动物中,气味由位于主嗅上皮(莫伊)和犁鼻器(VNO)中的感觉神经元识别。莫伊和VNO在显示雌性行为中的相对贡献还不清楚。Cnga 2或Trpc 2缺失的小鼠分别在莫伊和VNO中基本上缺乏气味诱发的活性。使用Cnga2和Trpc 2中的一个或两个的雌性突变体,我们发现,孕产妇护理是由莫伊和VNO差异调节:检索流浪的幼崽需要的莫伊和冗余的VNO调节,而孕产妇侵略需要两个感觉上皮细胞的功能。女性的性感受性似乎受到莫伊和VNO的调节。Trpc2空女性先前已被证明显示男性型安装对其他男性。值得注意的是,我们发现,女性的Cnga2和Trpc 2的双突变体继续安装其他男性,表明男性型的性显示中观察到的Trpc 2无效的女性不需要化学感觉输入功能莫伊的解除抑制。综上所述,我们的研究结果揭示了一个以前不受重视的复杂性在雌性小鼠的生殖行为的化学感觉控制。
Olfaction exerts a profound influence on reproductive physiology and behavior in many animals, including rodents. Odors are recognized by sensory neurons residing in the main olfactory epithelium (MOE) and the vomeronasal organ (VNO) in mice and many other vertebrates. The relative contributions of the MOE and VNO in the display of female behaviors are not well understood. Mice null for Cnga2 or Trpc2 essentially lack odor-evoked activity in the MOE and VNO, respectively. Using females mutant for one or both of Cnga2 and Trpc2, we find that maternal care is differentially regulated by the MOE and VNO: retrieval of wandering pups requires the MOE and is regulated redundantly by the VNO whereas maternal aggression requires both sensory epithelia to be functional. Female sexual receptivity appears to be regulated by both the MOE and VNO. Trpc2 null females have previously been shown to display male-type mounting towards other males. Remarkably, we find that females double mutant for Cnga2 and Trpc2 continue to mount other males, indicating that the disinhibition of male-type sexual displays observed in Trpc2 null females does not require chemosensory input from a functional MOE. Taken together, our findings reveal a previously unappreciated complexity in the chemosensory control of reproductive behaviors in the female mouse.
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