TDP-43変異は,家族性および散発性アミオトロフィック横関節硬化症における変異である
Jemeen Sreedharan1, Ian P Blair, Vineeta B Tripathi
1Department of Clinical Neuroscience, King's College London, Medical Research Council (MRC) Centre for Neurodegeneration Research, and Institute of Psychiatry, London, SE5 8AF, UK.
Science (New York, N.Y.)
|March 1, 2008
まとめ
TARDNA結合タンパク質 (TDP-43) をコードするTARDBP遺伝子の変異は,アミオトロフィック横筋硬化症 (ALS) と関連しています. この研究は,TDP-43機能障害がALSにおける神経変性に寄与する証拠を提供する.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- アミオトロフィック横筋硬化症 (ALS) は致命的な神経変性疾患である.
- ALSの病理学的特徴には,ユビキチン化されたTAR DNA結合タンパク質 (TDP-43) の含有が含まれています.
- TDP-43の正確な機能とALSの病原性におけるその役割は完全に理解されていません.
研究 の 目的:
- ALS.におけるTARDBP変異の潜在的な役割を調査する.
- TDP-43変異の機能的影響を調査する.
主な方法:
- TARDBP変異を特定するために,散発的および家族性ALS症例の遺伝子分析.
- 特定された変異を持つ家族内の分離分析.
- ゲノム全体のリンクスキャンは,遺伝子の位置を確認します.
- ミュータントTDP-43の断片化に関するインビトロ研究.
- ニワトリの胚モデルを用いたインビボ研究で,神経アポトーシスと発達効果を評価した.
主要な成果:
- TARDBPの保存された領域の隣接する突然変異は,ALS患者で特定されました.
- 特定の変異,TARDBPM337Vは,同類のヒトで病気と共に分離した.
- 結合分析により,TARDBPの1p36.3染色体の位置が確認されました.
- 変異型TDP-43は,野生型と比較して,インビトロでは断片化が増加したことを示した.
- In vivoでは,変異したTDP-43がニワトリの胚に神経アポトーシスと発達遅延を引き起こした.
結論:
- この発見は,TDP-43機能障害とALSとの間の直接的な病理生理学的関連性を示唆しています.
- TARDBPの変異は,ALSにおける神経変性プロセスに寄与する.
- TDP-43はニューロンの健康と発達に重要な役割を果たし,その機能不全はALSにつながる可能性があります.
さらに関連する動画
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
06:58Evaluation of LC3-II Release via Extracellular Vesicles in Relation to the Accumulation of Intracellular LC3-positive Vesicles
Published on: October 18, 2024
関連する概念動画
01:29Alzheimer Disease l: Introduction
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
01:21Huntington Disease l: Introduction
Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...
01:24Parkinson Disease ll: Pathophysiology
Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
03:03Amyloid Fibrils
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, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...