Impact of statins as immune-modulatory agents on inflammatory markers in adults with chronic diseases: A systematic review and meta-analysis
Solima Sabeel, Bongani Motaung, Ken Nguyen, Mumin Ozturk, Sandra Mukasa, Karen Wolmarans, Dirk Blom, Karen Sliwa, Emmanuel Nepolo, Gunar Günther, Robert J. Wilkinson, Claudia Schacht, André Pascal Kengne, Friedrich Thienemann, Reto Guler
Abstract
While numerous studies have extensively documented the pleiotropic effects of statins, including their capacity to reduce inflammation, there is a lack of research estimating the anti-inflammatory effectiveness of statins among individuals with chronic diseases. This meta-analysis evaluates the effect of statin therapy on inflammatory markers and the lipid profile in patients with chronic diseases by analysing evidence from randomized controlled trials (RCTs). We conducted a systematic review and searched articles published between 1st January 1999 and 31st December 2023 in databases including PubMed, Web of Science, Scopus, and Cochrane. The meta-analysis was performed using random effects models and inverse variance. Effect measures were mean differences (MD) and 95% confidence intervals (CI). Collectively, statins significantly reduced IL-6 (MD = -0.24 ng/dL [95% CI, -0.36 to -0.13], I2 = 98.3%, p < 0.001), TNF-α (MD = -0.74 ng/dL [95% CI, -1.08 to -0.40], I2 = 98.8%, p < 0.001); and CRP (MD = -1.58 mg/L [95% CI, -2.22 to -0.94], I2 = 86.5%, p < 0.001). Notably, atorvastatin demonstrated the most significant reduction in IL-6 and TNF-α levels, while fluvastatin and rosuvastatin displayed the greatest impact on decreasing CRP and LDL-C levels, respectively. Stratification by a longer treatment duration of more than four months revealed that atorvastatin achieved the most significant reduction in IL-6 and TNF-α. In conclusion, statin therapy not only regulates the lipid profile but also reduces systemic inflammatory biomarkers. Prolonged administration of statins led to a more substantial reduction in IL-6 and TNF-α, with atorvastatin exhibiting the greatest effect in our analysis.