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Area of Science:

  • Neuroscience
  • Genomics
  • Molecular Biology

Background:

  • COVID-19 is linked to neurological and psychiatric issues.
  • Alternative polyadenylation (APA) generates mRNA diversity and influences disease progression.
  • APA plays a regulatory role in viral infections.

Purpose of the Study:

  • To analyze APA usage in frontal cortex cells from COVID-19 patients and controls.
  • To identify cell-type-specific APA events in response to SARS-CoV-2 infection.
  • To investigate the functional consequences of APA changes in the brain.

Main Methods:

  • Single-cell analysis of APA in frontal cortex cells.
  • Comparison between non-viral controls and COVID-19 patients.
  • Identification of differentially expressed genes and affected pathways.

Main Results:

  • SARS-CoV-2 infection alters poly(A) site (PAS) usage in a cell-type-dependent manner.
  • Genes with altered PAS levels are involved in RNA splicing, neuronal development, and function.
  • Significant APA changes were observed in 267 microRNA-targeted risk genes for neurological and psychiatric disorders.

Conclusions:

  • APA alterations in neural cells contribute to nervous system dysfunction following COVID-19.
  • These findings provide insights into the mechanisms underlying COVID-19-associated neurological and psychiatric sequelae.
  • Altered APA may represent a therapeutic target for managing long-term neurological complications of COVID-19.