[Study on the protective effects of ZnSO4 on rat flaps with ischemia reperfusion injury].
OBJECTIVE
To observe the protective role of the ectogenesis zinc in the rat flap with ischemia-reperfusion injury and study the mechanism.


METHODS
An abdominal island flap was created in Wistar rats. 48 rats were randomly divided into three groups, 16 per group: the non-ischemia-reperfusion group, the ischemia-reperfusion group and the ischemia-reperfusion (IR) group treated with zinc. The content of malondialdehyde (MDA) and the activity of myeloperoxidase (MPO) were measured. The expression of metallothionein (MT) was observed, and the image analysis was performed. The ultrastructure changes of the skin flap with ischemia-reperfusion injury and the flap viability were observed.


RESULTS
Compared with the IR group, at 1 h and 24 h of reperfusion, the level of MDA in the adding-zinc-IR group decreased 11.3% and 33.2% (P < 0.05); the activity of MPO decreased 14.2% and 22.7% (P < 0.05); the content of MT increased 41.5% and 44% ( P < 0.01) respectively. In the ischemia-reperfusion injury flaps, MT was located in the cytoplasm of many kinds of cells. The ultrastructure changes of the skin flap of the adding-zinc-IR group were slighter than those of the IR group. The flap viability in the adding-zinc-IR group increased 27.2% (P < 0.05).


CONCLUSIONS
MT could be induced by ectogenesis zinc in the flap of rats. The flap with ischemia-reperfusion injury was protected by MT through protecting the cells in the flap.
Qiu
Shu-lin
SL
Department of Burns and Plastic Surgery, People's Hospital of Hebei Province, Shijiazhuang 050051, China.
Xie
Xiang
X
Xu
Jin-xiu
JX
Hu
Guo-dong
GD
D000818:Animals; D006085:Graft Survival; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D015427:Reperfusion Injury / Q000517:prevention & control*; D013524:Surgical Flaps; D019287:Zinc Sulfate / Q000494:pharmacology / Q000627:therapeutic use*
D019287:Zinc Sulfate