Antagonistic effect of l-stepholidine on striatal ischemic injury in rat.
OBJECTIVE
To elucidate the protection of l-stepholidine (SPD) on neuronal morphology and function against the striatal ischemic injury in rat.


METHODS
The forebrain ishemia to Sprague Dawley rats was induced with four-vessel occlusion. Histological examination was performed on the dorsolateral striatum with cresylviolet stain. In striatal slices of rat as an in vitro ischemic model, the activity of calcium/calmodulin-dependent protein kinase II (CCDPK) and lactate dehydrogenase (LDH) was examined by the method of 32P-incorporation and colorimetry, respectively.


RESULTS
In the SPD-treated groups, most of the neurons in the striatum kept the normal morphological appearance after 30-min ischemia followed by 6-h or 12-h reperfusion. The number of neurons was much more in SPD groups than that in vehicle group. The sparse and abnormal neurons were observed in the vehicle group. SPD attenuated the ischemic effect on the CCDPK activity in striatal slices. In addition, SPD inhibited the leakage of LDH from neurons induced by ischemia in incubated striatal slices.


CONCLUSIONS
SPD protected striatal neurons against ischemic injury and antagonized the inhibitory action on CCDPK activity induced by ischemia. SPD reduced the leakage of LDH from striatal neurons induced by ischemia.
Tang
F M
FM
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031.
Ding
Y M
YM
Chen
Y T
YT
Sun
Y F
YF
Wang
R
R
Zhang
G Y
GY
Jin
G Z
GZ
D000818:Animals; D001599:Berberine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D002121:Calcium Channel Blockers / Q000494:pharmacology; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000378:metabolism; D003342:Corpus Striatum / Q000378:metabolism* / Q000473:pathology; D002546:Ischemic Attack, Transient / Q000378:metabolism* / Q000473:pathology; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008297:Male; D009474:Neurons / Q000473:pathology; D051381:Rats; D017207:Rats, Sprague-Dawley
D002121:Calcium Channel Blockers; D001599:Berberine; C010513:stepholidine; D007770:L-Lactate Dehydrogenase; D017871:Calcium-Calmodulin-Dependent Protein Kinases