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Evaluating the value of lactic dehydrogenase in anti-MDA5-positive Dermatomyositis associated with interstitial lung
Wenhan Huang1, Feifeng Ren1, Kechen Qian1
1Department of Rheumatology and Immunology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Objective:
This retrospective cohort study aimed to investigate the relationship between lactic dehydrogenase (LDH) and anti-melanoma differentiation-associated gene 5 antibodies-positive dermatomyositis (anti-MDA5-positive DM) associated with interstitial lung disease (ILD).
Method:
A total of 168 anti-MDA5-positive DM patients with ILD underwent comprehensive evaluation, including LDH, anti-Ro-52 antibodies, serum ferritin determination, and lung high-resolution computed tomography (CT).
Results:
The levels of LDH were significantly elevated in anti-MDA5-positive DM patients compared with the control group (p < 0.01). Anti-Ro-52-positive patients exhibited significantly higher LDH levels than anti-Ro-52-negative patients (p < 0.01). Patients with elevated serum ferritin exhibited markedly increased LDH levels compared with those with lower serum ferritin (p < 0.01). After treatment, LDH levels significantly increased in patients with ILD deterioration (p < 0.01), whereas LDH levels decreased in patients with ILD amelioration or stabilization (p < 0.01). The LDH levels were significantly elevated in the death group compared to the survival group before treatment (p = 0.02).
Conclusion:
(1) The LDH levels were affected by anti-Ro-52 antibodies and serum ferritin. (2) The severity of ILD in anti-MDA5-positive DM patients was positively correlated with LDH, suggesting that LDH might serve as an effective assessment indicator to evaluate the changes in ILD in these patients. (3) Elevated LDH levels were a crucial indicator of poor prognosis in anti-MDA5-positive DM patients, warranting close attention from rheumatologists.
