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Related Concept Videos

Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Parkinson's Disease: Overview01:15

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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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The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Parkinson Disease l: Introduction01:24

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Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of...
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Parkinson Disease ll: Pathophysiology01:24

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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...
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Updated: May 3, 2026

The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
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Shared and Sex-Specific Genetic Risk for Parkinson's Disease Risk Across European Populations.

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Sex-stratified analyses reveal novel genetic factors influencing Parkinson's disease (PD) risk. While overall genetic architecture is similar, specific loci show sex-specific effects, enhancing our understanding of PD genetics.

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Area of Science:

  • Neurogenetics
  • Genomics
  • Sex Differences in Disease

Background:

  • Parkinson's disease (PD) exhibits sex-based variations in prevalence, symptoms, and treatment response.
  • Biological sex likely influences PD's underlying molecular and genetic mechanisms.
  • The contribution of genetic factors to sex-specific PD differences is not well understood.

Purpose of the Study:

  • To identify sex-specific autosomal genetic factors contributing to Parkinson's disease risk.
  • To explore potential genetic underpinnings of observed sex differences in PD.

Main Methods:

  • Conducted a sex-stratified genome-wide association study (GWAS) meta-analysis.
  • Utilized data from large European cohorts including the Global Parkinson's Genetics Program, International Parkinson's Disease Genomics Consortium, UK Biobank, and Fox Insight Genetics Study.
  • Analyzed data from over 226,000 individuals (18,145 female PD cases, 95,558 female controls, 28,747 male PD cases, 83,746 male controls).

Main Results:

  • High genetic correlation (rg = 0.909) and comparable heritability (∼10-11%) observed between sexes.
  • Identified 57 genome-wide significant association signals, including five novel PD risk loci.
  • Discovered three novel loci significant in males only (RBM8A, ANKRD23, CNTN4) and two in females only (RERE, ARL6IP6).
  • Observed statistically significant sex-specific effects at several loci, including GALC, RERE, ARL6IP6, and RBM8A.

Conclusions:

  • Parkinson's disease genetic architecture is largely similar between males and females.
  • Sex-stratified GWAS analyses are crucial for uncovering additional PD genetic risk factors missed in combined studies.
  • Identification of novel loci and sex-specific effects advances understanding of PD pathogenesis.