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Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis
Interleukin-6 (IL-6), as a pleiotropic cytokine, has been demonstrated to be closely associated with the pathogenisis of rheumatoid arthritis (RA). However, whether this association is causal or not remains unclear, because of the multifactorial role of IL-6 and related confounding factors. We aimed...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Wolters Kluwer Health
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4907673/ https://www.ncbi.nlm.nih.gov/pubmed/27281095 http://dx.doi.org/10.1097/MD.0000000000003855 |
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author | Li, Bing Xiao, Yu Xing, Dan Ma, Xin-long Liu, Jun |
author_facet | Li, Bing Xiao, Yu Xing, Dan Ma, Xin-long Liu, Jun |
author_sort | Li, Bing |
collection | PubMed |
description | Interleukin-6 (IL-6), as a pleiotropic cytokine, has been demonstrated to be closely associated with the pathogenisis of rheumatoid arthritis (RA). However, whether this association is causal or not remains unclear, because of the multifactorial role of IL-6 and related confounding factors. We aimed to evaluate the causal relevance between circulating IL-6 levels and the risk of RA through meta-analytical Mendelian randomization approach. IL-6 gene -174G/C variant was selected as an instrument in this Mendelian randomization meta-analysis. Article identification and data collection were conducted in duplicate and independently by 2 authors. The STATA software was used for data analysis. In total, 15 and 5 articles on the association of the -174G/C variant with RA risk and circulating IL-6 level, respectively, were included. The overall analysis showed that C allelic and GC+CC genotype were significantly with 1.59-fold (95% CI: 1.19–2.14) and 1.63-fold (95% CI: 1.17–2.26) increased risk of developing RA, respectively. Asian populations showed stronger association with 4.55-fold (95% CI: 1.62–12.75), 1.84-fold (95% CI: 1.13–2.99), and 4.69-fold (95% CI: 1.68–13.14) increased RA risk in carriers of -174C allelic, CC, and GC+CC genotype, respectively. Carriers of GC+CC genotype showed significant reduction in the circulating IL-6 level compared with GG carriers (WMD = −0.77; 95% CI: −1.16 to −0.38; P = 0.000) in overall populations. Mendelian randomization presented 6% and 22% increased risk of RA with 0.1 pg/mL reduction of circulating IL-6 level in overall and Asian populations, respectively. This Mendelian randomization meta-analysis demonstrated that the long-term genetically reduced circulating IL-6 level might be causally related to a higher risk of RA, especially in Asian populations. |
format | Online Article Text |
id | pubmed-4907673 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Wolters Kluwer Health |
record_format | MEDLINE/PubMed |
spelling | pubmed-49076732016-07-28 Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis Li, Bing Xiao, Yu Xing, Dan Ma, Xin-long Liu, Jun Medicine (Baltimore) 6900 Interleukin-6 (IL-6), as a pleiotropic cytokine, has been demonstrated to be closely associated with the pathogenisis of rheumatoid arthritis (RA). However, whether this association is causal or not remains unclear, because of the multifactorial role of IL-6 and related confounding factors. We aimed to evaluate the causal relevance between circulating IL-6 levels and the risk of RA through meta-analytical Mendelian randomization approach. IL-6 gene -174G/C variant was selected as an instrument in this Mendelian randomization meta-analysis. Article identification and data collection were conducted in duplicate and independently by 2 authors. The STATA software was used for data analysis. In total, 15 and 5 articles on the association of the -174G/C variant with RA risk and circulating IL-6 level, respectively, were included. The overall analysis showed that C allelic and GC+CC genotype were significantly with 1.59-fold (95% CI: 1.19–2.14) and 1.63-fold (95% CI: 1.17–2.26) increased risk of developing RA, respectively. Asian populations showed stronger association with 4.55-fold (95% CI: 1.62–12.75), 1.84-fold (95% CI: 1.13–2.99), and 4.69-fold (95% CI: 1.68–13.14) increased RA risk in carriers of -174C allelic, CC, and GC+CC genotype, respectively. Carriers of GC+CC genotype showed significant reduction in the circulating IL-6 level compared with GG carriers (WMD = −0.77; 95% CI: −1.16 to −0.38; P = 0.000) in overall populations. Mendelian randomization presented 6% and 22% increased risk of RA with 0.1 pg/mL reduction of circulating IL-6 level in overall and Asian populations, respectively. This Mendelian randomization meta-analysis demonstrated that the long-term genetically reduced circulating IL-6 level might be causally related to a higher risk of RA, especially in Asian populations. Wolters Kluwer Health 2016-06-10 /pmc/articles/PMC4907673/ /pubmed/27281095 http://dx.doi.org/10.1097/MD.0000000000003855 Text en Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. http://creativecommons.org/licenses/by/4.0 This is an open access article distributed under the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0 |
spellingShingle | 6900 Li, Bing Xiao, Yu Xing, Dan Ma, Xin-long Liu, Jun Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title | Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title_full | Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title_fullStr | Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title_full_unstemmed | Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title_short | Circulating interleukin-6 and rheumatoid arthritis: A Mendelian randomization meta-analysis |
title_sort | circulating interleukin-6 and rheumatoid arthritis: a mendelian randomization meta-analysis |
topic | 6900 |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4907673/ https://www.ncbi.nlm.nih.gov/pubmed/27281095 http://dx.doi.org/10.1097/MD.0000000000003855 |
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