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Are Curcuminoids Effective C-Reactive Protein-Lowering Agents in Clinical Practice? Evidence from a Meta-Analysis: CURCUMINOIDS AND CRP

Sahebkar, Amirhossein·2014·Phytotherapy Research

Abstract

BACKGROUND: Inflammation plays a pivotal role in the pathogenesis of atherosclerosis and cardiovascular disease (CVD). In this context, C-reactive protein (CRP) has been identified as a strong predictor and independent risk factor of CVD. Curcuminoids are multifunctional natural product with promising cardioprotective and anti-inflammatory properties. Curcuminoids have been suggested to lower circulating levels of CRP, but clinical findings have not been consistent. OBJECTIVES: To pool the published results of clinical trials on the impact of supplementation with curcuminoids on circulating levels of CRP. METHODS: PubMed/MEDLINE and SCOPUS databases were searched for clinical trials reporting circulating CRP changes in individuals receiving curcuminoids. Effect sizes with 95% confidence intervals (CI) were calculated using a random-effects model. Inter-study heterogeneity was assessed using Cochran's Q and I(2) tests. Sensitivity analyses were conducted using leave-one-out method. RESULTS: Six trials comprising 172 subjects in the curcuminoids group and 170 subjects in the placebo group fulfilled the eligibility criteria and included in the meta-analysis. Compared with placebo, supplementation with curcuminoids was associated with a significant reduction in circulating CRP levels (weighed mean difference: -6.44 mg/L; 95% CI: -10.77 - -2.11; p = 0.004). This significant effect was maintained in subgroups of trials that used bioavailability-improved preparations of curcuminoids and had supplementation duration of ≥4 weeks, but not in the subgroups without these characteristics. CONCLUSIONS: Supplementation with curcuminoids may reduce circulating CRP levels. This effect appears to depend on the bioavailability of curcuminoids preparations and also duration of supplementation. Future well-designed and long-term trials are warranted to verify this effect of curcuminoids.

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Metadata

Authors
Sahebkar, A.
Venue
Phytotherapy Research
Publisher
Wiley
Published
2013-08-07
Volume
28
Issue
5
Pages
633-642
ISSN
0951-418X (ISSN-L)
OpenAlex
W2164737140
Cited by
303
References
8
FWCI
1.80
Type
journal article
Language
en
Open access
closed

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