跨大脑区域的基因表达在行为分歧的鹿鼠中演变
Andreas F Kautt1, Jenny Chen1, Caitlin L Lewarch1
1Department of Organismic & Evolutionary Biology, Department of Molecular & Cellular Biology, Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA.
Molecular ecology
|January 24, 2024
概括
大脑基因表达的遗传变异驱动着先天的行为. 这项研究揭示了大脑各区域基因调节的模块化,这对于理解行为多样性至关重要.
科学领域:
- 神经科学是一个神经科学.
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
背景情况:
- 天生的行为由于神经系统的遗传变异而演变.
- 基因调节,特别是 cis 和 trans 调节性变化,在大脑进化中起着关键作用.
- 了解大脑基因表达模块化对于解释行为多样性至关重要.
研究的目的:
- 研究十个大脑子区域的转录变异及其调节基础.
- 为了比较两个姐妹鹿鼠物种 (Peromyscus maniculatus和P. polionotus) 和它们的F1杂交物种之间的基因表达模式.
- 探索 cis 和 trans 调节差异在大脑基因表达差异中的作用.
主要方法:
- 在两个鹿鼠物种及其杂交物种的10个脑子子区域上进行了RNA测序 (RNA-Seq).
- 进行了差异基因表达分析,以确定物种,性别和大脑区域之间的差异.
- 基因调节类别被分配给识别保存,cis调节或跨调节分歧.
主要成果:
- 大多数基因表达变异区分大脑子区域,其次是物种.
- 跨种类差异表达是普遍的 (52-59%的基因),而基于性别的差异是适度的 (~3%).
- 发现基因调节差异在大脑区域大致上是模块化的,许多基因在不同区域表现出不同的调节类.
结论:
- 大脑基因表达的差异在大脑区域之间高度模块化,并有助于物种特定的特征.
- 互联监管分歧是这种模块化的重要驱动因素.
- 了解大脑基因表达的模块化进化是解释动物行为多样性的关键.
相关概念视频
Epistasis
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Human Genetics
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...


