Title:Association Serum S100B Protein in Alzheimer’s Disease: A Case Control Study from South India
Volume: 17
Issue: 12
关键词:
阿尔茨海默氏病，血清S100B蛋白升高，CRP，病例对照研究，糖尿病，神经退行性变。
摘要:
Background: Recent evidence points to a possible link between the inflammatory modulatory
protein S100B protein and the pathogenesis of Alzheimer’s disease (AD).
Objective: To investigate the elevated levels of serum S100B protein among AD in a South Indian
cohort and its correlation with severity of cognitive impairment.
Methods: A cross-sectional study was conducted with 100 AD patients and 100 age and sex matched
healthy controls. Diagnosis of AD was made by a qualified neurologist using NINCDS ADRDA criteria.
Measurement of serum S100B protein was performed using solid phase sandwich ELISA method
in both cases and controls.
Results: Significantly higher prevalence of elevated serum S100B protein 44(44%) (p<0.0001), hypertension
52(52%) (p=0.02), diabetes mellitus 58(58%) (p=0.002), thyroid dysfunction 28(28%)
(p=0.009), positive CRP 46(46%) (p<0.0001) and lower mean Mini-Mental State Examination
(MMSE) values 20.4±5.1 (p<0.0001) were seen in AD patients compared to controls. Elevated S100B
protein levels were significantly associated with Clinical dementia rating (CDR) score 2(34%)
(p=0,05) and score 3 (61.3%) (p=0.03) compared to normal levels. After multivariable logistic regression
analysis positive C-Reactive Protein (odds: 3.2; 95%CI: 2.8-9.8)(p=0.001), elevated S100B protein
(odds: 9.0;95%CI:2.2-35.8) and diabetes mellitus (odd:1.2;95%CI:1.0-4.9)(p<0.0001), were significantly
associated with AD.
Conclusion: In our study, we established an independent association of elevated serum S100B protein
levels with AD. Elevated S100B protein levels higher in CDR score 3.
