European journal of paediatric neurology : EJPN : official journal of the European Paediatric Neurology Society · 2025
Value of creatine kinase and creatinine as biomarkers in nusinersen-treated children with spinal muscular atrophy.
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Ren Jielu, Yu Yicheng, Zou Xinli, Feng Yijie, Zhu Danhui, Yan Yue, Jiang Liya, Jin Jianing, Huang Siyi, Gao Feng, Mao Shanshan
Аннотация
BACKGROUND: The search for convenient and effective biomarkers is a critical and pressing need for spinal muscular atrophy (SMA) in the era of disease-modifying treatment.
METHODS: Data from 65 SMA children treated with nusinersen and followed up for 18 months were retrospectively collected. Motor function was assessed at baseline, 6, 10, 14 and 18 months using the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP-INTEND), the Hammersmith Functional Motor Scale Expanded (HFMSE), and the Revised Upper Limb Module (RULM). Serum creatine kinase (CK) and creatinine (Crn) levels were measured, and the correlations were further analyzed.
RESULTS: Significant differences in CK and Crn levels were found among different types before treatment. Baseline CK levels in children with SMA type 3 were higher than those with types 1 and 2 (P = 0.008 and 0.042, respectively), while baseline Crn levels were higher in type 3 than in type 2 (P < 0.001). During the follow-up, baseline Crn levels in types 2 and 3 patients with clinically meaningful improvements in HFMSE scores were higher than those without such improvements (P = 0.013). Additionally, a correlation was observed between HFMSE scores and CK and Crn levels in types 2 and 3 patients (CK: P < 0.001, ρ = 0.473; Crn: P < 0.001, ρ = 0.642). RULM scores were correlated with Crn levels (P < 0.001, ρ = 0.642).
CONCLUSIONS: Serum CK and Crn levels appear to correlate with clinical severity in later-onset SMA. Moreover, baseline serum Crn may serve as a potential biomarker for predicting the degree of motor function improvement under nusinersen treatment in children with later-onset SMA.
METHODS: Data from 65 SMA children treated with nusinersen and followed up for 18 months were retrospectively collected. Motor function was assessed at baseline, 6, 10, 14 and 18 months using the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP-INTEND), the Hammersmith Functional Motor Scale Expanded (HFMSE), and the Revised Upper Limb Module (RULM). Serum creatine kinase (CK) and creatinine (Crn) levels were measured, and the correlations were further analyzed.
RESULTS: Significant differences in CK and Crn levels were found among different types before treatment. Baseline CK levels in children with SMA type 3 were higher than those with types 1 and 2 (P = 0.008 and 0.042, respectively), while baseline Crn levels were higher in type 3 than in type 2 (P < 0.001). During the follow-up, baseline Crn levels in types 2 and 3 patients with clinically meaningful improvements in HFMSE scores were higher than those without such improvements (P = 0.013). Additionally, a correlation was observed between HFMSE scores and CK and Crn levels in types 2 and 3 patients (CK: P < 0.001, ρ = 0.473; Crn: P < 0.001, ρ = 0.642). RULM scores were correlated with Crn levels (P < 0.001, ρ = 0.642).
CONCLUSIONS: Serum CK and Crn levels appear to correlate with clinical severity in later-onset SMA. Moreover, baseline serum Crn may serve as a potential biomarker for predicting the degree of motor function improvement under nusinersen treatment in children with later-onset SMA.