Dement Neurocogn Disord.  2015 Sep;14(3):123-127. 10.12779/dnd.2015.14.3.123.

Clinical Implication of High Sensitivity C-Reactive Protein for the Development of Dementia in Parkinson's Disease

Affiliations
  • 1Department of Neurology, College of Medicine, The Catholic University of Korea, Seoul, Korea. siuy@cmcnu.or.kr
  • 2Department of Neurology, Veterans Health Service Medical Center, Seoul, Korea.

Abstract

BACKGROUND AND PURPOSE
High-sensitivity C-reactive protein (hs-CRP) is the most widely studied biomarker of systemic inflammation. Its level has been reported to be associated with cognitive impairment. While dementia and cognitive impairment are common non-motor symptoms in advanced idiopathic Parkinson's disease (PD), the clinical value of hs-CRP for predicting dementia in PD patients remains unclear. Therefore, the objective of this study was to clarify the relationship between hs-CRP levels and the development or progression of dementia in PD through evaluating hs-CRP levels in PD patients with or without dementia.
METHODS
A total of 112 PD patients without dementia (PD-D), 103 PD patients with dementia (PD+D), and 94 healthy controls were used in this study. The levels of hs-CRP and cognitive function were analyzed among these three groups.
RESULTS
The mean serum hs-CRP levels in PD-D and PD+D were 1.76+/-3.62 mg/dL and 1.44+/-2.78 mg/dL, respectively, which were significantly (p=0.02) higher than that (vs. 0.41+/-1.06 mg/dL) in healthy controls. However, the levels of hs-CRP were not significantly (p>0.05) different between PD-D and PD+D.
CONCLUSIONS
Our results suggest that neuro-inflammation plays a role in the pathogenesis of PD. However, it does not significantly contribute to the development or the progression of dementia in PD patients.

Keyword

Parkinson's disease; dementia; C-reactive protein

MeSH Terms

C-Reactive Protein*
Dementia*
Humans
Inflammation
Parkinson Disease*
C-Reactive Protein

Figure

  • Fig. 1 Mean hs-CRP level comparison among patients with Parkinson's disease without dementia (PD-D), patients with Parkinson's disease with dementia (PD+D), and control subjects (CS). Graph with error bars representing the mean hs-CRP level and 95% CI of the mean. Mann-Whitney U test used to compare hs-CRP levels among the three groups showed no differences between the PD-D group and the PD+D group (p=0.409). However, a significant difference was observed between CS and PD-D (p=0.001) or between CS and PD+D (p=0.009). CI: confidence interval, hs-CRP: high sensitivity C-reactive protein.


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