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首页> 外文期刊>The European Journal of Neuroscience >A common gene exclusion mechanism used by two chemosensory systems.
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A common gene exclusion mechanism used by two chemosensory systems.

机译:两个化学感应系统使用的常见基因排除机制。

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摘要

Sensory coding strategies within vertebrates involve the expression of a limited number of receptor types per sensory cell. In mice, each vomeronasal sensory neuron transcribes monoallelically a single V1R pheromone receptor gene, chosen from a large V1R repertoire. The nature of the signals leading to this strict receptor expression is unknown, but is apparently based on a negative feedback mechanism initiated by the transcription of the first randomly chosen functional V1R gene. We show, in vivo, that the genetic replacement of the V1rb2 pheromone receptor coding sequence by an unrelated one from the odorant receptor gene M71 maintains gene exclusion. The expression of this exogenous odorant receptor in vomeronasal neurons does not trigger the transcription of odorant receptor-associated signalling molecules. These results strongly suggest that despite the different odorant and vomeronasal receptor expression sites, function and transduction cascades, a common mechanism is used by these chemoreceptors to regulate their transcription.
机译:脊椎动物内的感觉编码策略涉及每个感觉细胞表达有限数量的受体类型。在小鼠中,每个犁鼻感觉神经元均单等位转录一个单一的V1R信息素受体基因,该基因选自较大的V1R库。导致这种严格的受体表达的信号的性质尚不清楚,但显然是基于由第一个随机选择的功能性V1R基因的转录引发的负反馈机制。我们在体内显示,V1rb2信息素受体编码序列被来自气味受体基因M71的一个不相关的基因替代基因保持了基因排斥。这种外源性气味受体在犁鼻神经元中的表达不会触发与气味受体相关的信号分子的转录。这些结果有力地表明,尽管增香剂和犁鼻受体的表达位点,功能和转导级联不同,但这些化学感受器仍采用共同的机制来调节其转录。

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