Roles of Akt pathway and cell apoptosis in leptin-mediated chronic mor-phine antinociceptive tolerance / 中国病理生理杂志
Chinese Journal of Pathophysiology
;
(12): 2163-2167, 2016.
Article
in Chinese
| WPRIM
| ID: wpr-506652
ABSTRACT
AIM:
To explore the roles of Akt ( also called protein kinase B ) and active caspase-3 in the leptin-mediated chronic morphine antinociceptive tolerance in rats .METHODS:
A model of chronic morphine antinociceptive tolerance was established in the SD rats .The protein levels of spinal Akt and cleaved caspase-3 were tested by Western blotting.The technique of immunohistochemical staining was used to detect the immunoreactivity positive cells of phospho -rylated ( p)-Akt and cleaved caspase-3 in the spinal cord .Double staining of immunohistochemistry was used to examine the cellular location of the p-Akt and cleaved caspase-3 positive cells.RESULTS:
The chronic intrathecal injection of morphine (15 μg) for 7 d markedly upregulated the spinal protein levels of p-Akt and cleaved caspase-3 in the rats.Thirty min before injection of morphine , intrathecal injection of leptin antagonist (3μg) for 7 d significantly attenuated the upreg-ulation of the protein levels of p-Akt and cleaved caspase-3 induced by chronic morphine treatment .The p-Akt was exclu-sively observed in the spinal neurons .The cleaved caspase-3 was only localized with the spinal astrocytes .Intrathecal injec-ting the inhibitors of leptin , Akt and caspase-3 ameliorated the chronic antinociceptive tolerance .CONCLUSION:
The spinal Akt pathway and active caspase-3 are involved in the leptin-mediated chronic morphine antinociceptive tolerance in rats.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Pathophysiology
Year:
2016
Type:
Article
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