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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Genetic links between multimorbidity and human aging.

Phuong-Anh Dinh1, HyeRim Han2, Seungsoo Kim2

  • 1Department of Biological Sciences, Columbia University, New York, NY, 10027, USA.

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This summary is machine-generated.

Researchers identified shared genetic factors underlying multiple age-related diseases (ARDs) and human longevity. Lifestyle factors also influence ARD risk, suggesting targets for healthy aging interventions.

Keywords:
Age-related diseaseAgingGeroscienceMultimorbidityMultivariate analysis

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Area of Science:

  • Genetics
  • Gerontology
  • Epidemiology

Background:

  • Multimorbidity from age-related diseases (ARDs) poses a significant public health challenge.
  • Understanding the shared biological mechanisms of ARDs is crucial for developing effective interventions.

Purpose of the Study:

  • To investigate the shared genetic architecture of five common ARDs: heart attack, high cholesterol, hypertension, stroke, and type 2 diabetes.
  • To identify genetic variants and biological pathways contributing to the co-occurrence of ARDs and their relationship with human aging.

Main Methods:

  • Multivariate genome-wide association analysis (GWAS) to identify a multivariate age-related disease factor (mvARD).
  • Integrative gene prioritization using transcriptome-wide association studies (TWAS), colocalization, and Mendelian randomization.
  • Two-sample Mendelian randomization to assess the causal influence of lifestyle factors on ARDs.

Main Results:

  • Identified 263 independent variants across 180 genomic loci associated with mvARD.
  • Discovered significant enrichment of these variants with extreme human longevity, supporting the geroscience hypothesis.
  • Identified four high-confidence genes (DCAF16, PHF13, MGA, GTF2B) with putative causal roles in mvARD.
  • Found causal links between modifiable lifestyle factors (e.g., BMI, diet) and the risk of multiple ARDs.

Conclusions:

  • A shared genetic basis for common ARDs exists, overlapping with the biology of human aging.
  • Findings suggest potential molecular and behavioral targets for interventions aimed at delaying disease onset and promoting healthy aging.