Meta-regression analysis of the effect of lifestyle interventions on mediators of inflammation in postmenopausal breast cancer women with cardiovascular risk factors

Abstract

Background: Chronic inflammation is associated with obesity, dyslipidemia, and different types of malignancies that may play a complex role in the risk of breast cancer (BC) recurrence and therapy related side effects. The purpose of this review was to determine the effects of lifestyle interventions on mediators of inflammation (C-reactive protein (CRP), interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α)) and other therapy related adverse events in postmenopausal BCS with cardiovascular related risk factors. Methods: A systematic search for relevant articles was performed according to the Preferred Reporting Items for Systematic Review and Meta-Analysis criteria using available databases (PubMed, Scopus, The Cochrane Library, OpenGrey, Google Scholar and CENTRAL). Results: Twelve eligible randomized controlled trials (RCT) met the inclusion criteria. The mean ages of postmenopausal BC women ranged from 49 to 56 years. The meta-regression revealed that there was moderate evidence that MSE decreased the mean difference (MD) of inflammatory markers in BCS, with CVD risk factors (MD: 0.31; 95% CI: 0.05 to 0.57, P=0.02; heterogeneity: Tau² = 0. 12; Chi² = 106.30, df = 19, I² = 0. 50.4%). Conclusion: There is a moderate level of evidence on the effects of MSE on mediators of inflammation in postmenopausal BCS with cardiovascular risk factors. A number of shared risk factors between postmenopausal status and CVD should be considered, while treating postmenopausal BCS.