Differential host responses to COVID-19: Unraveling the complexity

Diagn Microbiol Infect Dis. 2024 Jun;109(2):116281. doi: 10.1016/j.diagmicrobio.2024.116281. Epub 2024 Mar 24.

Abstract

These diverse outcomes of Covid-19 are influenced by various factors including age, gender, underlying health conditions, immune responses, viral variants, external factors, and overall quality of life. Demographic analysis of patients aged 0-18 years experienced mild to moderate cases, above 55 years with co-morbidities, were more severely affected.COVID-19 incidence was higher in males (58 %) & (42 %) in females. The reduced expression of Toll-like receptors (TLR) in severe and critical patients is a crucial determinant. This reduced TLR expression is primarily attributed to the dominance of the PLpro viral protein of COVID-19. Disease enrichment analysis highlights the long-term impact of COVID-19, which can lead to post-recovery complications such as hypertension, diabetes, cardiac diseases, and brain ischemia in Covid-19 patients. In conclusion, a comprehensive strategy targeting key factors like PLpro, TLR, and inflammatory cytokines such as IL-1 and IL-6 could offer an effective approach to mitigate the devastating effects of COVID-19.

Keywords: ACE2; Co-morbidity; Immune response; Inflammatory cytokines; PLpro etc; Risk factor; Toll like receptors.

Publication types

  • Review

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • COVID-19* / immunology
  • Child
  • Child, Preschool
  • Cytokines / blood
  • Cytokines / immunology
  • Female
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Middle Aged
  • SARS-CoV-2* / immunology
  • Toll-Like Receptors / immunology
  • Young Adult

Substances

  • Toll-Like Receptors
  • Cytokines