High-sensitivity C-reactive protein, low-grade systemic inflammation and type 2 diabetes mellitus: A two-sample...

Area of Science:

• Genetics and Medicine
• Metabolic Diseases
• Inflammation Research

Background:

• The role of inflammation in type 2 diabetes mellitus (T2D) is not fully understood.
• High-sensitivity C-reactive protein (hsCRP) is a marker of inflammation.
• Investigating the causal link between hsCRP and T2D is crucial for understanding disease mechanisms.

Purpose of the Study:

• To investigate the potential causal association between hsCRP concentration and T2D.
• To examine the relationship between hsCRP and glycemic traits.
• To utilize Mendelian Randomization (MR) to assess these associations.

Main Methods:

• Two-sample Mendelian Randomization analysis using summary statistics from large genome-wide association studies.
• Employed inverse-variance weighting (IVW), MR-Egger regression, and weighted-median estimation for robust analysis.
• Utilized 15 genetic instruments for hsCRP, including hsCRP-specific instruments.

Main Results:

• Inverse-variance weighting showed no association between hsCRP and T2D.
• MR-Egger regression and weighted-median estimation indicated a potential causal association between hsCRP and T2D.
• No causal association was found between hsCRP and glycemic traits.

Conclusions:

• Mendelian Randomization provides evidence for a potential causal link between hsCRP and T2D, particularly when accounting for pleiotropy.
• hsCRP is not causally associated with glycemic traits.
• Further research is needed to clarify the inflammatory pathways involved in T2D pathogenesis.