PMID- 33303765 OWN - NLM STAT- MEDLINE DCOM- 20210507 LR - 20210507 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 10 IP - 1 DP - 2020 Dec 10 TI - Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers. PG - 21736 LID - 10.1038/s41598-020-78426-8 [doi] LID - 21736 AB - Plant-based diets like vegetarian or vegan diets might influence circulating levels of inflammatory biomarkers, thereby reducing the risk of chronic diseases. This systematic review and meta-analysis aimed to investigate the associations of veganism and vegetarianism with circulating inflammatory biomarkers in comparison to omnivores. Literature search was conducted in Pubmed and EMBASE until April 2020 and mean differences of biomarkers were assessed for: C-reactive protein (CRP), interleukin-6 (IL-6), interleukin-18 (IL-18), interleukin-1 receptor antagonist (IL-1 RA), tumor necrosis factor-alpha (TNF-a), E-selectin, intercellular adhesion molecule-1 (ICAM-1), monocyte chemoattractant protein-1 (MCP-1), adiponectin, omentin-1 and resistin. Of initially identified 1073 publications, 21 cross-sectional studies met the inclusion criteria and were included in the systematic review and meta-analysis. Vegan diet was associated with lower levels of CRP compared to omnivores [mean difference - 0.54 mg/l, 95%-CI: - 0.79 to - 0.28, p < 0.0001]. This association was less pronounced in vegetarians [mean difference - 0.25 mg/l, 95%-CI: - 0.49 to 0.00, p = 0.05]. In patients with impaired kidney function, the association between vegetarian nutrition and CRP was much stronger with - 3.91 mg/l (95%-CI: - 5.23 to - 2.60; p < 0.0001). No substantial effects were observed for all other inflammatory biomarkers. Despite strong associations between CRP and a vegan or vegetarian diet were seen, further research is needed, as most inflammatory biomarkers were investigated only in single studies so far. FAU - Menzel, Juliane AU - Menzel J AD - Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany. Juliane.Menzel@bfr.bund.de. FAU - Jabakhanji, Afraa AU - Jabakhanji A AD - Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany. FAU - Biemann, Ronald AU - Biemann R AD - Institute for Clinical Chemistry and Pathobiochemistry, Otto-Von-Guericke University Magdeburg, Magdeburg, Germany. AD - Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig, Leipzig, Germany. FAU - Mai, Knut AU - Mai K AD - Department of Endocrinology and Metabolism, Charite - Universitatsmedizin Berlin, Berlin, Germany. AD - Center for Cardiovascular Research (CCR), Charite - Universitatsmedizin Berlin, Berlin, Germany. AD - German Centre for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany. FAU - Abraham, Klaus AU - Abraham K AD - Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany. FAU - Weikert, Cornelia AU - Weikert C AD - Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany. LA - eng PT - Comparative Study PT - Journal Article PT - Meta-Analysis PT - Research Support, Non-U.S. Gov't PT - Systematic Review DEP - 20201210 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Biomarkers) RN - 0 (Inflammation Mediators) RN - 0 (Interleukin 1 Receptor Antagonist Protein) RN - 0 (Interleukin-18) RN - 0 (Interleukin-6) RN - 9007-41-4 (C-Reactive Protein) SB - IM MH - Biomarkers/blood MH - *C-Reactive Protein MH - Chronic Disease/*prevention & control MH - *Diet, Vegan MH - *Diet, Vegetarian MH - Inflammation/*diagnosis/*prevention & control MH - Inflammation Mediators/*blood MH - Interleukin 1 Receptor Antagonist Protein/blood MH - Interleukin-18/*blood MH - Interleukin-6/*blood PMC - PMC7730154 COIS- The authors declare no competing interests. EDAT- 2020/12/12 06:00 MHDA- 2021/05/08 06:00 PMCR- 2020/12/10 CRDT- 2020/12/11 05:52 PHST- 2020/07/17 00:00 [received] PHST- 2020/11/17 00:00 [accepted] PHST- 2020/12/11 05:52 [entrez] PHST- 2020/12/12 06:00 [pubmed] PHST- 2021/05/08 06:00 [medline] PHST- 2020/12/10 00:00 [pmc-release] AID - 10.1038/s41598-020-78426-8 [pii] AID - 78426 [pii] AID - 10.1038/s41598-020-78426-8 [doi] PST - epublish SO - Sci Rep. 2020 Dec 10;10(1):21736. doi: 10.1038/s41598-020-78426-8.