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Associations between serum IL-8 and knee symptoms, joint structures, and cartilage or bone biomarkers in patients with knee osteoarthritis

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A Correction to this article was published on 28 May 2020

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Abstract

Objective

The aim of this study was to investigate cross-sectional associations between serum levels of IL-8 and the above outcomes in patients with knee osteoarthritis (OA).

Methods

A total of 160 subjects with clinical knee OA were included. Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score and Lequesne index were used to assess the joint symptom. Magnetic resonance imaging was used to measure knee structural abnormalities including infrapatellar fat pad (IPFP) signal intensity alternation. Knee radiographic OA was assessed by radiography using the Kellgren-Lawrence (K-L) grading system. Enzyme-linked immunosorbent assay was used to measure the serum levels of IL-8 and cartilage or bone biomarkers.

Results

In multivariable analyses, serum IL-8 was positively associated with WOMAC weight-bearing pain (β 2.85, P = 0.028), WOMAC physical dysfunction (β 12.71, P = 0.048), and Lequesne index (β 1.65, P = 0.015), and had positive associations with IPFP signal intensity alteration (OR 3.18, P = 0.011) and serum levels of N-telopeptide of type I collagen (NTXI), N-terminal procollagen III propeptide (PIIINP), matrix metalloproteinase (MMP)3, and MMP13 (β 0.24–1.44, all P < 0.05) in patients with clinical knee OA. Furthermore, there were positive associations between IL-8 and WOMAC score (β 22.49, P = 0.037), K-L grades (OR 3.88, P = 0.013), and IPFP signal intensity alteration (OR 3.20, P = 0.033) in patients with radiographic OA.

Conclusions

Serum levels of IL-8 were positively associated with increased knee symptoms, IPFP signal intensity alteration, and serum levels of bone and/or cartilage biomarkers, suggesting that IL-8 may have a role to play in knee OA.

Key Point

• This study systemically investigates the associations between serum IL 8 and knee symptoms, joint structures, and cartilage or bone biomarkers in patients with knee osteoarthritis, and some significant associations have been found, suggesting that IL 8 may have a role to play in knee OA.

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Change history

  • 28 May 2020

    There were overlaps between the article recently published in this journal [1] and the previous publications from the authors��� group [2-4] that they did not cite.]

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Acknowledgments

We appreciate the support of the Department of Rheumatology and Immunology at the First Affiliated Hospital of Anhui Medical University and, of course, all the participants.

Funding

This study has been supported by the National Natural Science Foundation of China (81172865).

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Authors and Affiliations

  1. Department of Rheumatology and Immunology, Arthritis Research Institute, the First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Street, Hefei, Anhui, China

    Guangfeng Ruan, Jianhua Xu, Kang Wang, Shuang Zheng, Juan Wu, Fuqin Bian, Bingru Chang & Changhai Ding

  2. Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, Tasmania, Australia

    Guangfeng Ruan, Shuang Zheng, Yan Zhang, Tao Meng, Zhaohua Zhu, Weiyu Han & Changhai Ding

  3. Clinical Research Centre, Zhujiang Hospital, Southern Medical University, No. 253, Middle Gongye Avenue, Guangzhou, Guangdong, China

    Guangfeng Ruan, Yan Zhang, Zhaohua Zhu, Weiyu Han & Changhai Ding

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  1. Guangfeng Ruan
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  2. Jianhua Xu
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  3. Kang Wang
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Correspondence to Changhai Ding.

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Ruan, G., Xu, J., Wang, K. et al. Associations between serum IL-8 and knee symptoms, joint structures, and cartilage or bone biomarkers in patients with knee osteoarthritis. Clin Rheumatol 38, 3609–3617 (2019). https://doi.org/10.1007/s10067-019-04718-8

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  • DOI: https://doi.org/10.1007/s10067-019-04718-8

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