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Lysosomal Hydrolases01:22

Lysosomal Hydrolases

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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,...
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Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Parkinson's Disease: Treatment01:24

Parkinson's Disease: Treatment

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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
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Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
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Lysosomes01:31

Lysosomes

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Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
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Updated: May 15, 2025

Human Peripheral Blood Neutrophil Isolation for Interrogating the Parkinson's Associated LRRK2 Kinase Pathway by Assessing Rab10 Phosphorylation
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コマンダー複合体はリソソーム機能を調節し,パーキンソン病のリスクに関係している.

Georgia Minakaki1, Nathaniel Safren1, Bernabe I Bustos1

  • 1Davee Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA.

Science (New York, N.Y.)
|April 10, 2025
PubMed
まとめ

GBA1の遺伝子変異はパーキンソン病 (PD) とルイ体の認知症 (DLB) と関連しています. 研究者は,GCaseの活性とリソソーム機能に影響を与える重要なタンパク質としてCOMMD3を特定し,神経変性疾患の新たな治療標的を示唆した.

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Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration
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関連する実験動画

Last Updated: May 15, 2025

Human Peripheral Blood Neutrophil Isolation for Interrogating the Parkinson's Associated LRRK2 Kinase Pathway by Assessing Rab10 Phosphorylation
12:49

Human Peripheral Blood Neutrophil Isolation for Interrogating the Parkinson's Associated LRRK2 Kinase Pathway by Assessing Rab10 Phosphorylation

Published on: March 21, 2020

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Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration
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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration

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科学分野:

  • 神経遺伝学
  • 分子生物学
  • 細胞生物学

背景:

  • GBA1遺伝子の変異は,グルコセレブロシダース (GCase) の活性低下につながり,パーキンソン病 (PD) とルイ体の認知症 (DLB) の確立された危険因子です.
  • GBA1変異の個体で観察された不完全な浸透性は,PDとDLBの表れに他の遺伝的要因が関与していることを示している.

研究 の 目的:

  • GCaseの活性とリソソーム機能の新しい遺伝子変容体を特定する.
  • 溶解体ホメオスタシスにおけるCOMMD3タンパク質の役割とその神経変性疾患との潜在的な関連を調査する.

主な方法:

  • ゲノム全体のCRISPR干渉スクリーンを集約して,GCaseとリソソーム活性を変更する遺伝子を特定しました.
  • この研究では,COMMD3の損失が溶解体タンパク質の放出と内溶解体配送に及ぼす影響を分析した.

主要な成果:

  • 銅代謝のMURR1ドメインを含む3 (COMMD3) タンパク質は,GCaseとリソソームの活性を変化させるものとして特定されました.
  • COMMD3の機能の喪失は,細胞外膀媒介によるリゾソームタンパク質の放出を増加させ,エンドリゾソーム伝達を阻害し,リゾソーム機能障害を引き起こした.
  • コマンダー遺伝子のファミリー内の稀な変異は,PDのリスクの増加と関連していることが判明しました.

結論:

  • COMMDタンパク質と関連する複合体は,リソソームのホメオスタシスの維持に重要な役割を果たします.
  • これらの発見は,COMMD遺伝子とその関連複合体は,パーキンソン病およびライソソーム機能障害によって特徴づけられる他の神経変性疾患の修正剤として作用する可能性があることを示唆している.