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Target Perturbation of Genetically Proxied Antidiabetic Drug Targets and Pneumonia Risk: A Mendelian Randomization

Siyi Lin1, Hongxia Xu2, Jingyan Xia3

  • 1Department of Infectious Diseases, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, China.

Current Topics in Medicinal Chemistry
|June 2, 2026
PubMed
Abstract

Insights

This study investigated the causal link between Type 2 Diabetes Mellitus (T2DM) medications and pneumonia risk using Mendelian Randomization. Certain antidiabetic drug targets show associations with pneumonia, offering new research directions.

Area of Science:

  • Genetics
  • Epidemiology
  • Pharmacology

Background:

  • Type 2 Diabetes Mellitus (T2DM) and its treatments are suspected to influence pneumonia incidence and mortality.
  • The causal relationship between T2DM, antidiabetic medications, and pneumonia remains unclear.

Purpose of the Study:

  • To evaluate the potential causal relationships between T2DM, specific antidiabetic drug targets, and pneumonia risk.
  • To utilize Mendelian Randomization (MR) to assess these genetic associations.

Main Methods:

  • Two-sample MR analyses were performed using genetic instruments for T2DM and six antidiabetic drug targets (PPARG, GIPR, GLP1R, INSR, ABCC8, KCNJ11).
  • Data from FinnGen, GWAS Catalog, and other consortia were used for discovery and validation cohorts, with meta-analysis for integration.
  • Exploratory Summary-data-based Mendelian Randomization (SMR) and sensitivity analyses were conducted.

Main Results:

  • Strong associations were found between ABCC8/KCNJ11 and cytomegaloviral pneumonitis, and between GIPR and overall pneumonia risk.
  • Nominal associations were observed for several drug targets with various pneumonia subtypes, though some had limited statistical power.
  • Exploratory SMR analysis indicated potential links between ABCC8, GIPR, and pneumonia risk.

Conclusions:

  • Genetically proxied antidiabetic drug targets demonstrate associations with pneumonia risk, generating hypotheses for further research.
  • Findings suggest potential mechanisms linking T2DM pharmacotherapy to pneumonia.
  • Larger studies are needed to validate these findings, especially for rare pneumonia subtypes.
Keywords:
Antidiabetic drug targetsGWASMendelian randomizationcausalitypneumonia risktype 2 diabetes mellitus.

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