在阿尔茨海默氏病中逃离X染色体失活和性别差异
Qing-Hua Song1, Ke-Xuan Zhao1, Shuai Huang1
1Department of Pharmacology, China Pharmaceutical University, No. 24 Tong Jia Xiang, Nanjing 210009, Jiangsu Province, China.
Reviews in the neurosciences
|December 29, 2023
概括
阿尔茨海默病 (AD) 的性别差异很大,女性患病率更高,男性患病结果更差. 逃脱X染色体失活的X相关基因可能解释这些差异,并提供新的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 药理学 药理学是指药理学的学科.
背景情况:
- 阿尔茨海默病 (AD) 在流行,发病和进展方面表现出明显的基于性别的差异.
- 虽然女性患病率更高,但患有阿尔茨海默症的男性往往面临更早的死亡率和更严重的认知衰退.
- 在阿尔茨海默病中,这些性别差异的根本原因在很大程度上是未知的.
研究的目的:
- 研究在阿尔茨海默病中观察到的性别差异中X相关遗传因素的作用.
- 为了确定关键的X染色体失活逃脱基因涉及到AD.
- 探索这些基因作为性别特异性AD治疗的治疗点的潜力.
主要方法:
- 综述最近关于X链基因和AD的研究结果.
- 对X染色体失活 (XCI) 逃脱基因的分析.
- 探索已识别的基因的潜在治疗应用.
主要成果:
- 在女性中,某些基因逃脱X染色体失活 (XCI),导致双重表达剂量.
- 这些XCI逃生基因是阿尔茨海默病中性别特异性的潜在贡献者.
- 特定逃脱基因的识别为AD研究提供了新的途径.
结论:
- 与X相关的遗传因素,特别是XCI逃生基因,在阿尔茨海默病中观察到的性别差异中起着至关重要的作用.
- 了解这些遗传机制可以为精准医学和AD的性别特异性治疗策略铺平道路.
- 对XCI逃脱基因的进一步研究有望为开发阿尔茨海默病的向治疗提供希望.
相关概念视频
02:50Dosage Compensation
6.2K
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
6.2K
01:58X-Inactivation
38.5K
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
38.5K
02:45The Ratio of X Chromosome to Autosomes
8.5K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.5K
01:26Alzheimer's Disease: Overview
491
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
491
01:19X-linked Traits
54.9K
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
54.9K
02:32X and Y Chromosomes
26.0K
Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
26.0K