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Int J Med Sci 2024; 21(2):396-403. doi:10.7150/ijms.89569 This issue Cite

Research Paper

Interplay of Systemic Immune-Inflammation Index and Serum Klotho Levels: Unveiling a New Dimension in Rheumatoid Arthritis Pathology

Jinlong Zhao^1,2, Yifan Jia³, Lingfeng Zeng^1,2,4, Hetao Huang², Guihong Liang^1,2,4, Kunhao Hong^3,5, Bangxin Sha³, Minghui Luo², Jun Liu^3,4,5✉, Weiyi Yang^2✉

1. The Second Clinical College/State Key Laboratory of Traditional Chinese Medicine Syndrome of Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
2. The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou 510120, China.
3. The Fifth Clinical College of Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
4. The Research Team on Bone and Joint Degeneration and Injury of Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou 510120, China.
5. Guangdong Second Chinese Medicine Hospital (Guangdong Province Engineering Technology Research Institute of Traditional Chinese Medicine), Guangzhou 510095, China.

✉ Corresponding author: Jun Liu: No.12, Jichang Road, Baiyun District, Guangzhou city, Guangdong province, China; gjtbedu.cn. Weiyi Yang: No.111, Dade Road, Yuexiu District, Guangzhou city, Guangdong province, China; gdszyyywycom.

Abstract

Aim: The association between the systemic immune-inflammation index (SII) and serum Klotho concentrations (pg/ml) in patients with rheumatoid arthritis (RA) has not been elucidated. The purpose of this study was to clarify the relationship between the SII and serum Klotho concentrations in RA patients.

Methods: All data come from the National Health and Nutrition Examination Survey (NHANES) database in the United States, which included 982 RA patients (age range: 40 to 79 years). The measurement data of the SII and serum Klotho are all from the NHANES mobile examination centre. We constructed a multivariate linear regression model to evaluate the association between the SII and serum Klotho levels in RA patients and conducted a subgroup analysis to test the stability of the statistical results. Results: Multivariate linear regression results indicated a negative linear relationship between the SII and serum Klotho concentrations in RA patients (β = -6.33, 95% CI [confidence interval]: -10.15 to -2.53). Compared to the quartile 1 group, the quartile 4 group was associated with significantly lower (P<0.001) serum Klotho concentrations (β = -120.93, 95% CI: -174.84 to -67.02). Compared with the quartile 1 group, with the increase in the SII, the β value showed a decreasing trend (P _trend < 0.001). The subgroup analysis showed that none of the covariates affected the stability of these results (all P for interaction ≥ 0.05).

Conclusion: There is a significant negative linear association between the SII and serum Klotho concentrations in RA patients. The SII can serve as a predictive indicator of serum Klotho concentrations in RA patients, and Klotho may be a potential anti-inflammatory target for RA treatment.

Keywords: association, systemic immune-inflammation index, SII, rheumatoid arthritis, Klotho

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