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Original Article | Open Access

Serum lipoprotein‐associated phospholipase A2 activity in Chinese patients with systemic lupus erythematosus

Jie Feng1Kun Wang2Yanhong Gao1()
Department of Clinical Laboratory, The First Medical Center of PLA General Hospital, Beijing, China
Department of Clinical Laboratory, The Second Medical Center of PLA General Hospital, Beijing, China

Jie Feng and Kun Wang contributed equally to this study and shared the co‐first authorship.

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This study investigates the relationship between serum lipoprotein‐associated phospholipase A2 (Lp‐PLA2) activity and systemic lupus erythematosus (SLE) in a Chinese population, finding higher Lp‐PLA2 activity in SLE patients, which correlates with certain clinical manifestations and disease activity. These findings provide new insights into the pathogenesis of SLE and suggest that Lp‐PLA2 activity may contribute to SLE disease development.

Abstract

Background

Few studies have explored the association between lipoprotein‐associated phospholipase A2 (Lp‐PLA2) and systemic lupus erythematosus (SLE). However, most of these studies have investigated only European patient populations and have come to contradictory conclusions. Furthermore, few studies have been conducted on Chinese patient groups. This study aimed to explore the association between serum Lp‐PLA2 activity and SLE in a Chinese patient group.

Methods

Serum Lp‐PLA2 activity was detected in 154 SLE patients and 55 age‐, sex‐, and body mass index‐matched healthy controls. Information concerning the anthropometric data, clinical manifestations, SLE Disease Activity Index 2000 (SLEDAI‐2K), complement C3 (C3), and complement C4 (C4) erythrocyte sedimentation rate (ESR), and autoantibodies were evaluated.

Results

The average level of serum Lp‐PLA2 activity was 221 ± 56 U/L in SLE patients compared with 160 ± 37 U/L in healthy controls (p < 0.001). SLE patients that presented with nephritis, anemia, and fibrinolytic abnormality had higher serum Lp‐PLA2 activity than SLE patients who did not present with these symptoms (p < 0.05), and the levels of serum Lp‐PLA2 activity correlated with the severity of the clinical manifestations (p < 0.001). There was no correlation between serum Lp‐PLA2 activity and serum autoantibodies levels (p > 0.05). According to Spearman’s rank correlation coefficient, ESR, SLEDAI‐2K, C3, and C4 significantly correlated with serum Lp‐PLA2 activity (p < 0.001). According to binary logistic regression, Lp‐PLA2 activity was independently associated with active SLE in patients (OR 1.049; 95% CI: 1.025–1.073, p < 0.001).

Conclusions

Serum Lp‐PLA2 activity is associated with some clinical manifestations (nephritis, anemia, and fibrinolytic abnormality) in SLE patients, and its activity may contribute to the development of SLE disease. These findings provide new insight into the pathogenesis of SLE.

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Cite this article:
Feng J, Wang K, Gao Y. Serum lipoprotein‐associated phospholipase A2 activity in Chinese patients with systemic lupus erythematosus. iLABMED, 2024, 2(4): 277-285. https://doi.org/10.1002/ila2.67
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