ME2 缺乏与衰退性神经发育障碍有关
Naif A M Almontashiri1, Essa Alharby1, Mohammed Saleh2
1Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia.
Clinical genetics
|October 14, 2024
概括
恶性酶2 (ME2) 缺乏是神经发育障碍 (NDD) 的新发现原因之一. 这项研究确定了一种与NDD相关的新型ME2基因变异,突出了它在线粒体功能中的关键作用.
科学领域:
- 生物化学 生物化学
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
背景情况:
- 马拉酸是三碳酸循环中的一个关键二碳酸.
- 烟酸酸酶 (FH) 和酸脱酶 (MDH) 的缺陷与衰退性神经发育障碍 (NDD) 有关.
- 酶异型 (ME1和ME2) 将酸盐转化为酸盐,但它们在孟德尔病中的作用尚不清楚.
研究的目的:
- 为了调查患有NDD和其他症状的患者的遗传基础.
- 探索酶2 (ME2) 在人类健康和疾病中的作用.
- 确定孟德尔神经发育障碍的新型遗传原因.
主要方法:
- 在一个患有NDD的患者身上进行了整体外基因组测序 (WES).
- 在ME2基因中发现了一种同卵性框架转移变异.
- 进行了功能性研究,涉及酵母骨干删除和补充.
主要成果:
- 在该患者身上发现了ME2基因中的一种新型同卵性框架转移变异 (c.1379_1380delTT,p.Phe460fs*22).
- 鉴定到的变异导致了切断和不稳定的ME2蛋白.
- 删除ME2的酵母正基因导致生长停止,由ME2再表达挽救,证实ME2的重要作用.
结论:
- 这项研究报告了第一个孟德尔人体疾病,该疾病是由一个恶性酶基因的双变异引起的,具体来说是ME2.
- 这些发现支持ME2缺陷是衰退性NDD的原因.
- 需要进一步的研究来充分描述ME2相关的衰退性NDD.
相关概念视频
Inborn Errors of Metabolism
140
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
140
Genomic Imprinting and Inheritance
34.0K
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...
34.0K
Incomplete Dominance
21.8K
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.
21.8K
Pleiotropy
40.1K
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,...
40.1K
Sex-linked Disorders
101.5K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
101.5K
Neurulation
41.7K
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
41.7K


