根据遗传方式对ALS患者进行分层,揭示了sALS和fALS特有的转录组签名
Alexandria Awai1, Erica L Johnson1, Tiandong Leng2
1Department of Microbiology, Biochemistry & Immunology, Morehouse School of Medicine, Atlanta, GA 30310, USA.
International journal of molecular sciences
|September 27, 2025
概括
散发性肌缩性侧面硬化症 (sALS) 与家族性ALS (fALS) 呈现出明显的分子差异,特别是在线粒体功能和免疫反应途径方面. 了解这些转录组签名是开发向ALS治疗的关键.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 肌缩侧面硬化症 (ALS) 呈现出显著的临床和分子异质性.
- 散发性ALS (sALS) 的潜在生物学,包括~90%的病例,与家族性ALS (fALS) 相比,仍然不太了解.
研究的目的:
- 在零星ALS (sALS) 与家族ALS (fALS) 中识别不同的转录组特征和生物途径.
- 用死后组织样本调查sALS,fALS和对照组之间的分子差异.
主要方法:
- 来自247个死后脊髓和运动皮质样本的大量mRNA测序数据的分析.
- 不同基因表达分析 (DESeq2) 和加权基因共表达网络分析 (WGCNA).
- 基因本体学分析以识别独特的转录组签名和途径.
主要成果:
- sALS样本显示脊髓中的线粒体综合体I子单元和调节基因下调,表明代谢弹性降低.
- 观察到一种独特的免疫反应基因表达模式:在sALS的样本下调,在fALS的运动皮质样本上调.
- 研究结果表明,尽管有共同的疾病特征,但独特的转录组签名区分了sALS和fALS.
结论:
- 散发性ALS和家族性ALS,虽然基本上是相同的疾病,但表现出不同的转录组形状.
- 考虑遗传方式 (sALS与fALS) 对未来的ALS研究和治疗开发至关重要.
- 识别这些分子差异可以为更有针对性和有效的ALS治疗策略铺平道路.
相关概念视频
Multiple Allele Traits
38.0K
The Concept of Multiple Allelism
38.0K
Pedigree Analysis
88.8K
Overview
88.8K
Genomic Imprinting and Inheritance
36.8K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.8K
Alternative RNA Splicing
24.7K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
24.7K
Incomplete Dominance
29.6K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
29.6K
Pleiotropy
43.2K
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,...
43.2K


