Erschienen in:
01.08.2010 | Experimental research
RETRACTED ARTICLE: 6-Mercaptopurine exerts an immunomodulatory and neuroprotective effect on permanent focal cerebral occlusion in rats
verfasst von:
Chih-Zen Chang, Aij-Lie Kwan, Shen-Long Howng
Erschienen in:
Acta Neurochirurgica
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Ausgabe 8/2010
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Abstract
Background
A bursting cascade of inflammation imposes progressive neurological deterioration after experimental stroke has been demonstrated. In our study, 6-mercaptopurine (6-mp) has been successful in alleviating cerebral infarct in a rodent permanent middle cerebral artery occlusion (pMCAO) model. The present study was aimed to examine the effect of 6-mp on cytokine levels in experimental stroke.
Methods
The rodent pMCAO model was employed. A dose of 2 mg/kg 6-mp or vehicle (0.1 mol/L PBS) was administered intraperitoneally 30 min after the induction of pMCAO. Neurological score, serum, and cerebrospinal fluid (CSF) cytokines such as IL-1β, IL-6, and TNF-α and infarct volume were determined 48 h after pMCAO.
Results
Cerebral infarction volume was significantly decreased in animals treated with 6-mp (74.3%, p < 0.01), and the ratio of tissue edema was also decreased in 6-mp-treated groups (71%). Animals receiving 6-mp thus showed a significant decrease in IL-1 and TNF-α (18/43% and 48/64% in CSF/serum, respectively) when compared with the pMCAO groups (p < 0.01).
Conclusion
This study demonstrates that 6-mp interposes the production of IL-1 and TNF-α in CSF and serum, attenuates ischemic brain injury, and thus alleviates neurological deficits in the pMCAO animals. These findings also offer first evidence that 6-mp may attenuate TNF-α-related neuron apoptosis and also support the notion that 6-mp and other anti-inflammatory agents could potentially have therapeutic uses in cases of cerebral infarct.