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Research Article: Transforming growth factor-? superfamily members as potential biomarkers for adolescent major depressive disorder

Date Published: 2025-09-01

Abstract:
Growing evidence implicates the transforming growth factor-? (TGF-?) superfamily in neurodevelopment and immunoregulatory processes, with several members associated with depression in adults. However, the relationship between specific TGF-? superfamily members and adolescent major depressive disorder (MDD) remains poorly understood. This study aimed to evaluate whether specific TGF-? superfamily members could serve as biomarkers for adolescent MDD. In this cross-sectional study, 180 adolescents were enrolled,including individuals diagnosed with MDD and healthy controls (HC). Depressive symptoms were assessed using the 17-item Hamilton Depression Rating Scale (HAMD-17). Serum concentrations of transforming growth factor-?1 (TGF-?1),growth differentiation factor 11 (GDF11), and growth differentiation factor 15 (GDF15), were quantified via enzyme-linked immunosorbent assay (ELISA). Demographic and clinical characteristics were analyzed.Correlation and multiple linear regression analyses were performed to explore associations between serum TGF-? superfamily levels and depression severity. Furthermore, receiver operating characteristic (ROC) curve analysis was used to assess the diagnostic potential of these TGF-? superfamily members in MDD. Compared with healthy controls, the MDD group exhibited significantly lower serum levels of TGF-?1 and GDF11,and higher levels of GDF15 (all p < 0.05). Correlation analysis revealed that serum TGF-?1 and GDF11 were negatively associated with depression severity, while GDF15 levels showed a positive correlation. All three molecules demonstrated strong diagnostic potential for MDD. Combination of these three proteins demonstrated much better diagnostic effectiveness. Serum TGF-?1, GDF11, and GDF15 levels may serve as promising biomarkers for adolescent MDD, offering potential utility in identifying disease susceptibility. These findings highlight the TGF-? superfamily’s role in adolescent depression and warrant further mechanistic investigation.

Introduction:
Growing evidence implicates the transforming growth factor-? (TGF-?) superfamily in neurodevelopment and immunoregulatory processes, with several members associated with depression in adults. However, the relationship between specific TGF-? superfamily members and adolescent major depressive disorder (MDD) remains poorly understood. This study aimed to evaluate whether specific TGF-? superfamily members could serve as biomarkers for adolescent MDD.

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