Correlation between plasma macrophage inflammatory protein and early Parkinson's disease

Abstract

Objective To detect the plasma macrophage inflammatory protein (MIP) levels in patients with early Parkinson's disease (PD) and to investigate whether plasma MIP was associated with motor and non-motor symptoms in early PD. Methods Fifty-nine patients with early idiopathic PD (Hoehn-Yahr Staging Scale from 1.0 to 2.5) treated in our hospital from January 28, 2013 to September 30, 2013 and 54 healthy controls were recruited. Plasma MIP-1α and MIP-1β levels were measured by enzyme-linked immunosorbent assay. Motor function was assessed by Unified Parkinson's Disease Rating Scale Part Ⅲ and Hoehn-Yahr Staging Scale during on period. Total non-motor symptoms were assessed by Non-motor Symptoms Questionnaire. Cognitive dysfunction was assessed by Mini Mental State Examination. Autonotic dysfunction was assessed by Scales for Outcomes in Parkinson's disease-Autonomic. Depression was assessed by Hamilton Depressive Scale (HAMD). Rapid eye movement (REM) sleep behavior disorder was assessed by REM sleep behavior disorder screening questionnaire (RBDSQ). Correlation between plasma MIP levels and scale scores was analyzed by Spearman rank correlation. Results Plasma MIP-1α and MIP-1β levels were not significantly different between early PD patients and healthy controls. However, plasma MIP-1α level negatively correlated with depression (HAMD score, r=-0.520, P=0.027) and rapid eye movement sleep behavior disorder (RBDSQ score, r=-0.537, P=0.039). Conclusion MIP-1α may be correlated with depression and RBD in early PD. Key words: Parkinson disease; Macrophage inflammatory protein 1α; Macrophage inffammatory procein 1β; REM sleep behavior disorder; Depression