[No authors listed]
Little is known about the relevance of chromogranins (Cgs) and secretogranins (Sgs) in Parkinson's disease (PD). In this study, we determined serum levels of CgA, CgB, and SgII in PD patients and assessed their association with disease severity. PD patients were recruited, identified, and classified as having early (nâ=â14), intermediate (nâ=â18), or late (nâ=â4) stage disease according to Hoehn-Yahr scores. The serum concentrations of CgA, CgB, and SgII in patients with well-defined PD (nâ=â36) and in healthy controls (nâ=â52) were measured by enzyme-linked immunosorbent assay. Compared with controls, serum CgA levels were significantly elevated and serum SgII levels were significantly reduced in PD patients (both Pâ<â0.05). There was no difference in serum CgB levels between the two groups. Both serum CgA and SgII levels changed progressively over time from early to intermediate to late stage (Pâ<â0.05). Spearman correlation analysis revealed that serum CgA and SgII levels correlated with Hoehn-Yahr and UPDRS scores (Pâ<â0.001). These results indicate that changes in serum levels of CgA and SgII may be closely related to the severity of PD.
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