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Basic Science and Pathogenesis.

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Alzheimer's Disease (AD) involves more than cognitive decline, affecting cellular and cardiovascular functions. This study found upregulated pathways in AD related to cell adhesion, cardiovascular issues, and vascular function, suggesting broader disease mechanisms.

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Area of Science:

  • Neuroscience
  • Genomics
  • Cardiovascular Biology

Background:

  • Alzheimer's Disease (AD) is increasingly recognized for its impact beyond cognition, affecting vascular and cellular processes.
  • Dysregulated cell signaling and cardiovascular pathways are implicated in AD progression and comorbidities.
  • This study focuses on gene expression changes in AD, particularly upregulated pathways linked to cellular and cardiovascular dysfunction.

Purpose of the Study:

  • To investigate gene expression alterations in Alzheimer's Disease (AD).
  • To identify upregulated pathways in AD, focusing on cellular and cardiovascular functions.
  • To gain insights into the broader cellular and cardiovascular dysfunction associated with AD.

Main Methods:

  • Analysis of RNA expression data from the middle temporal gyrus of AD patients and controls (GEO dataset GSE132903).
  • Differential gene expression analysis using GEO2R, followed by pathway enrichment analysis via STRING-DB.
  • Examination of Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways related to cellular processes, cardiovascular function, and cancer, with FDR correction for statistical significance.

Main Results:

  • Significant upregulation of the Focal Adhesion pathway (hsa04510) and ECM-receptor interaction pathway (hsa04512) in AD, indicating altered cell-matrix interactions.
  • Upregulation of the Arrhythmogenic Right Ventricular Cardiomyopathy pathway (hsa05412) and pathways related to Vascular Smooth Muscle Contraction (hsa04270) and Fluid Shear Stress and Atherosclerosis (hsa05418), suggesting cardiovascular and vascular dysfunction.
  • Upregulation of Hippo signaling pathway (hsa04390) was also observed, highlighting potential alterations in cellular proliferation and tissue repair mechanisms in AD.

Conclusions:

  • Upregulated pathways in AD suggest disruptions in vascular integrity and cellular interactions extending beyond the central nervous system.
  • Findings provide insights into the links between Alzheimer's Disease, cardiovascular disease, and cardiomyopathy.
  • Further research into these identified pathways is warranted to explore their potential as therapeutic targets for managing vascular and cellular dysfunction in AD.