SPTLC2变异与早期发病的ALS和FTD有关,这是由于异常的脂合成导致的
Hiroya Naruse1,2, Hiroyuki Ishiura1,3, Kayoko Esaki4
1Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Annals of clinical and translational neurology
|February 5, 2024
概括
SPTLC2中的新遗传变异与早期发生的肌缩性侧面硬化症 (ALS) 有关. 这一发现将脂体代谢功能障碍与ALS联系起来,提供了新的治疗点.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 肌缩侧面硬化症 (ALS) 是一种致命的神经退行性疾病,治疗选择有限.
- 早期发病的ALS呈现出复杂的表型,表明潜在的遗传异质性.
- 了解早期发病的ALS的遗传基础对于开发向疗法至关重要.
研究的目的:
- 在受影响的家庭中确定早期发病的ALS的遗传基础.
- 为了研究已识别的基因变异对脂酶代谢的功能后果.
- 探索这些变体在更广泛的ALS患者队列中的患病率.
主要方法:
- 在患有早期ALS的家庭中进行了全外体序列和三组分析.
- 进行了蛋白质结构分析和脂测量.
- 基因变异在早期发病的ALS,成人发病的ALS和健康的对照队伍中被评估为流行率.
主要成果:
- 血清棕转移酶长链基亚单元2 (SPTLC2) 基因中的异构体变异在早期发病的ALS患者中被确定.
- 这些SPTLC2变异与ORMDL3相邻,与之前报告的SPTLC1变异相似.
- 患有这些SPTLC2变异的患者表现出血陶胺水平升高,这表明血清棕甲基转移酶 (SPT) 活性增加和脂过量产生.
结论:
- 新型SPTLC2变异与早期发病的ALS有关,特别是在前性痴呆症患者中.
- 不调节的脂代谢,由升高的胺体证明,与ALS的发病有关.
- 这些发现扩大了ALS的遗传景观,并突出了SPT亚单元基因缺陷的作用.
更多相关视频
13:31Novel Atomic Force Microscopy Based Biopanning for Isolation of Morphology Specific Reagents against TDP-43 Variants in Amyotrophic Lateral Sclerosis
Published on: February 12, 2015
8.8K
06:58Evaluation of LC3-II Release via Extracellular Vesicles in Relation to the Accumulation of Intracellular LC3-positive Vesicles
Published on: October 18, 2024
671
相关概念视频
Alternative RNA Splicing
21.2K
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...
21.2K
RNA Splicing
56.4K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
56.4K
Amyloid Fibrils
9.5K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.5K
Glucose Transporters
22.8K
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
22.8K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K
Membrane Asymmetry Regulating Transporters
4.5K
Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
4.5K
