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Article

Multi-Ancestry Causal Association between Rheumatoid Arthritis and Interstitial Lung Disease: A Bidirectional Two-Sample Mendelian Randomization Study

1
Division of Pulmonary Medicine, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Republic of Korea
2
Basgenbio Inc., Seoul 04167, Republic of Korea
3
Department of Medical Informatics, Jeonbuk National University, Jeonju 54907, Republic of Korea
4
Department of Otorhinolaryngology, Jeonbuk National University, Jeonju 54907, Republic of Korea
5
Division of Pulmonary Medicine and Allergy, Department of Internal Medicine, Hanyang University College of Medicine, 222-1, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
*
Authors to whom correspondence should be addressed.
Contributed equally to this work as joint co-first authors.
Contributed equally to this work as joint co-corresponding authors.
J. Clin. Med. 2024, 13(20), 6080; https://doi.org/10.3390/jcm13206080
Submission received: 13 September 2024 / Revised: 6 October 2024 / Accepted: 9 October 2024 / Published: 12 October 2024
(This article belongs to the Section Respiratory Medicine)

Abstract

Abstract: Background: Rheumatoid arthritis (RA) is associated with diverse extra-articular manifestations, including interstitial lung disease (ILD). No previous studies have examined the bidirectional relationship between RA and ILD using the Mendelian randomization (MR) analyses. Therefore, we aimed to investigate this subject using a two-sample bidirectional MR method. Methods: We performed bidirectional two-sample MR using summary statistics from genome-wide association studies (GWASs). The data are publicly available, de-identified, and from European (EUR) and East Asian (EAS) ancestries. Results: A total of 474,450 EUR participants and 351,653 EAS participants were included for either forward or reverse MR analysis. In our primary analysis, we found significant evidence of an increased risk of ILD associated with RA among individuals of EUR ancestry (ORMR-cML = 1.08; 95% confidence interval [CI] = 1.03–1.14; p = 0.003) and EAS ancestry (ORMR-cML = 1.37; 95% CI = 1.23–1.54; p < 0.001). Additionally, the reverse MR showed significant evidence of an increased risk of RA associated with ILD among those of EUR ancestry (ORMR-cML = 1.12; 95% CI = 1.05–1.19; p < 0.001). However, only one instrumental variable was selected in the EAS ILD GWAS, and there was no increased risk of RA associated with ILD in those of EAS ancestry (ORMR-cML = 1.02; 95% CI = 0.91–1.14; p = 0.740). Conclusions: Our findings indicate that RA and ILD have a bidirectional causal inference when using the MR analysis of GWAS datasets. The findings are only relevant for genetic predisposition; thus, further research is needed to determine the impact of non-genetic predispositions.
Keywords: rheumatoid arthritis; interstitial lung disease; Mendelian randomization; causal effect; bidirectional rheumatoid arthritis; interstitial lung disease; Mendelian randomization; causal effect; bidirectional

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MDPI and ACS Style

Kim, B.-G.; Yoon, S.; Lee, S.Y.; Kim, E.G.; Kim, J.O.; Kim, J.S.; Lee, H. Multi-Ancestry Causal Association between Rheumatoid Arthritis and Interstitial Lung Disease: A Bidirectional Two-Sample Mendelian Randomization Study. J. Clin. Med. 2024, 13, 6080. https://doi.org/10.3390/jcm13206080

AMA Style

Kim B-G, Yoon S, Lee SY, Kim EG, Kim JO, Kim JS, Lee H. Multi-Ancestry Causal Association between Rheumatoid Arthritis and Interstitial Lung Disease: A Bidirectional Two-Sample Mendelian Randomization Study. Journal of Clinical Medicine. 2024; 13(20):6080. https://doi.org/10.3390/jcm13206080

Chicago/Turabian Style

Kim, Bo-Guen, Sanghyuk Yoon, Sun Yeop Lee, Eun Gyo Kim, Jung Oh Kim, Jong Seung Kim, and Hyun Lee. 2024. "Multi-Ancestry Causal Association between Rheumatoid Arthritis and Interstitial Lung Disease: A Bidirectional Two-Sample Mendelian Randomization Study" Journal of Clinical Medicine 13, no. 20: 6080. https://doi.org/10.3390/jcm13206080

APA Style

Kim, B.-G., Yoon, S., Lee, S. Y., Kim, E. G., Kim, J. O., Kim, J. S., & Lee, H. (2024). Multi-Ancestry Causal Association between Rheumatoid Arthritis and Interstitial Lung Disease: A Bidirectional Two-Sample Mendelian Randomization Study. Journal of Clinical Medicine, 13(20), 6080. https://doi.org/10.3390/jcm13206080

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