JNK pathway-associated phosphatase associates with rheumatoid arthritis risk, disease activity, and its longitudinal elevation relates to etanercept treatment response.

Abstract

BACKGROUND:

This study aimed to investigate the relationship of serum JNK pathway-associated phosphatase (JKAP) expression with rheumatoid arthritis (RA) risk and clinical features, also to explore the longitudinal change of JKAP during etanercept treatment and its relationship with etanercept treatment response in RA patients.

METHODS:

A total of 87 RA patients and 44 healthy controls (HCs) were enrolled; then, their JKAP expression in serum was determined by enzyme-linked immunosorbent assay (ELISA). Among 87 RA patients, 42 cases further received the 24-week etanercept treatment; then, their JKAP level in serum (detected by ELISA) and clinical response (evaluated by disease activity score in 28 joints (DAS28) score) were evaluated at week 4 (W4), week 12 (W12), and week 24 (W24) after initiation of etanercept treatment.

RESULTS:

JKAP expression was decreased in RA patients compared to HCs, which disclosed a good predictive value for RA risk. JKAP expression was negatively associated with tender joint count, swollen joint count, erythrocyte sedimentation rate, C-reactive protein, and DAS28 in RA patients, respectively. For RA patients who received 24-week etanercept treatment, their clinical response rate was 0.0%, 33.3%, 50.0%, and 69% at W0, W4, W12, and W24, respectively. Importantly, JKAP was gradually increased during etanercept treatment, whose longitudinal elevation positively related to etanercept treatment response in RA patients.

CONCLUSION:

Circulating JKAP links with decreased RA risk and mild disease activity, whose longitudinal elevation positively relates to etanercept treatment response.

• Authors: Li Sun, Jianxin Tu, Xiaowei Chen, Meijie Dai, Xiaoru Xia, Cailong Liu, Yan Zhou
• Journal: Journal of clinical laboratory analysis (J Clin Lab Anal) Vol. 35 Issue 4 Pg. e23709 (Apr 2021) ISSN: 1098-2825 [Electronic] United States
• PMID: 33547838 (Publication Type: Journal Article)
• Copyright: © 2021 The Authors. Journal of Clinical Laboratory Analysis published by Wiley Periodicals LLC.

Chemical References

• Mitogen-Activated Protein Kinase Phosphatases
• DUSP22 protein, human
• Dual-Specificity Phosphatases
• Etanercept

Topics

• Arthritis, Rheumatoid (drug therapy, enzymology, pathology)
• Dual-Specificity Phosphatases (metabolism)
• Etanercept (therapeutic use)
• Female
• Humans
• Male
• Middle Aged
• Mitogen-Activated Protein Kinase Phosphatases (metabolism)
• Predictive Value of Tests
• ROC Curve
• Risk Factors
• Treatment Outcome