Protection of melatonin against liver injuriesinduced by low-tempreture preservation / 中国药理学通报

ABSTRACT

AIMTo study whether Mel has protective role in liver c old preservation and its mechanism. METHODSTo study the role of Mel at the different concentration and time in liver cold preservation, we colle cted liver washing liquid and liver tissue from male SD rats. We analysed ALT, AST, LDH, HA, ET 1, MDA and SOD to see the function of liver cell and sinusoida l lining cell and mechanism of cell injury. At the same time, we studied the eff ects of Mel at different concentration and different time on liver cold preserva tion. RESULTS① The damage to liver function and change of its histology was aggravated with the prolongation of UW co ld preservation time, and injury of the sinusoidal lining cell was also aggravated gr adually. ② Indexes of the liver function and the sinusoidal lining cell functio n in the Mel solution cold preservation group were lower than that in the UW sol ution cold preservation group. These suggest protective role of Mel against live r injury caused by cold preservation. Its mechanism may be related to powerful a nti-oxidative effect of Mel. ③ The protective effect of Mel at 1?10 -5 m ol?L -1 ,1?10 -7 mol?L -1 was better than that of Mel at 1?10 -9 mol?L -1 . We found no obvious difference between the protection of Mel 1?10 -5 mol?L -1 and 1?10 -7 mol?L -1 indicati ng a concentration-effect relationship. CONCLUSIONProtective ef fect of UW solution used in clinic weakens gradually as cold preservation time increases. Mel solution has protective effect on liver cold preservation injury and is better than the simple UW solution. Its mechanism is related to anti-oxi dative effect of Mel.