在早期人类胎儿大脑发育中的转录性差异
Federica Buonocore1, Jenifer P Suntharalingham2, Olumide K Ogunbiyi3,4
1Genetics and Genomic Medicine Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, London, WC1N 1EH, UK. f.buonocore@ucl.ac.uk.
Communications biology
|April 25, 2025
概括
早期人类大脑发育显示出微妙的性别差异,主要是由PCDH11Y等性染色体驱动的,而不是性激素. 这些发现提供了关于神经发育性差异的见解.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 性染色体和激素在人类早期大脑发育中的作用尚不清楚.
- 关键的发育期,包括胎儿丸激素分泌,对于建立性别特异性大脑特征至关重要.
研究的目的:
- 研究人类发育中的大脑基因表达的基于性别的差异.
- 分析来自不同发育阶段胎儿大脑皮层样本的转录数据.
主要方法:
- 在受孕后7.5至17周之间对64个人类胎儿大脑皮质样本 (46,XY和46,XX) 的转录分析.
- 对性染色体基因表达的检查,包括X无活化和Y染色体基因.
- 分析与性激素通路相关的基因,包括雄激素受体.
主要成果:
- 观察到性别染色体基因表达的显著差异,包括女性 (46,XX) 样本中的XIST和TSIX以及男性 (46,XY) 样本中的Y染色体基因.
- 在男性大脑中鉴定了两个Y染色体特异性基因PCDH11Y和RP11-424G14.1.
- 性激素通路基因的有限差异;雄激素受体表达在两性中随着年龄的增长而下降,建议局部效应.
结论:
- 早期人类大脑发育表现出明显的性别差异,主要受到性染色体基因表达的影响.
- 虽然在皮层中,全球性激素的影响似乎很小,但像PCDH11Y这样的特定基因可能在神经发育和潜在的语言中发挥关键作用.
- 对局部激素机制和特定基因功能的进一步研究是有必要的.
相关概念视频
01:10Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
01:30Neurulation
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01:17Transcription
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
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Transcription Can Produce Different Kinds of RNA Molecules
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