Correlation of lymphocyte heat shock protein 70 levels with neurologic deficits in elderly patients with cerebral infarction.

Abstract

PURPOSE:

To assess the association between heat shock protein 70 (HSP70) levels and the severity of ischemic stroke in elderly patients.

METHODS:

We conducted a case-control study to investigate the changes in lymphocyte HSP70 levels by immunoblot in 65 elderly patients with mild (n = 22), intermediate (n = 21), or severe (n = 22) stroke, and in 34 healthy controls. We analyzed correlations between HSP70 levels and neurologic deficit scores on days 1, 15, and 30 after the onset of stroke.

RESULTS:

Mean (+/- SD) HSP70 levels were higher in all stroke patients compared with controls (mild stroke: 709 +/- 194 units; intermediate: 585 +/- 165 units; severe: 421 +/- 124 units; controls: 86 +/- 34 units on day 1). Patients with mild stroke had higher levels at day 1 and 15 than did patients with severe stroke. HSP70 levels decreased rapidly from days 1 to 30 in all patients, except in patients with severe stroke, in whom levels decreased slowly between days 15 and 30. There were significant negative correlations between HSP70 levels and neurologic deficit scores in patients on days 1 (r = -0.53, P < 0.001) and 15 (r = -0.54, P < 0.001), but a positive correlation on day 30 (r = 0.49, P < 0.001).

CONCLUSION:

These data suggest that HSP70 may be a marker for neuroprotection in the early stage of ischemic stroke and a marker for a crisis in the later stages of severe cerebral infarction. Further studies on the use of lymphocyte HSP70 levels in predicting clinical outcomes and underlying mechanisms in cerebral infarction are warranted.

• Authors: Xingfang Jin, Chengfeng Xiao, Robert M Tanguay, Li Yang, Feng Wang, Ming Chen, Xiaoye Fu, Ru Wang, Jie Deng, Zhijun Deng, Yongyong Zheng, Qingyi Wei, Tangchun Wu
• Journal: The American journal of medicine (Am J Med) Vol. 117 Issue 6 Pg. 406-11 (Sep 15 2004) ISSN: 0002-9343 [Print] United States
• PMID: 15380497 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright 2004 Elsevier Inc.

Chemical References

• HSP70 Heat-Shock Proteins

Topics

• Aged
• Aged, 80 and over
• Basal Ganglia (metabolism, pathology)
• Brain Ischemia (blood)
• Brain Stem (metabolism, pathology)
• Case-Control Studies
• Cerebral Cortex (metabolism, pathology)
• Cerebral Infarction (blood)
• China (epidemiology)
• Female
• HSP70 Heat-Shock Proteins (blood)
• Humans
• Lymphocytes (chemistry)
• Male
• Middle Aged
• Neurodegenerative Diseases (blood)
• Severity of Illness Index
• Statistics as Topic
• Thalamus (metabolism, pathology)
• Time Factors