Yasojima EY, Domingues RJDS, Silva RC, Sousa LFFD, Trindade Júnior SC. Comparison of remote and local postconditioning against hepatic ischemic-reperfusion injury in rats.
Acta Cir Bras 2021;
36:e360101. [PMID:
33533826 PMCID:
PMC7853697 DOI:
10.1590/acb360101]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 12/11/2020] [Indexed: 02/07/2023] Open
Abstract
Purpose:
The aim of this study is to compare the hepatic protective effect of both
remote and local postconditioning (POS).
Methods:
Twenty-eight Wistar rats were assigned into four groups: sham group(SHAM),
ischemia-reperfusion group (IR), local ischemic POS group (lPOS) and remote
ischemic POS group (rPOS). Animals were subjected to liver ischemia for 30
min. Local ischemic POS group consisted of four cycles of 5 min liver
ischemia, followed by 5 min reperfusion (40 min). Remote ischemic POS group
consisted of four cycles of 5 min hind limb ischemia, followed by 5 min hind
limb perfusion after the main liver ischemia period. After 190 minutes
median and left liver lobes were harvested for biochemical and
histopathology analysis.
Results:
All the conditioning techniques were able to increase the level of
bothglutathione reductase and peroxidase, showing higher values in the rPOS
group when compared to the lPOS. Also, thiobarbituric acid reactive
substances were higher in all intervention groups when compared to SHAM, but
rPOS had the lower rates of increase, showing the best result. The
histopathology analysis showed that all groups had worst injury levels than
SHAM, but rPOS had lower degrees of damage when compared to the lPOS,
although it was not statistically significant.
Conclusion:
Remote postconditioning is a promising technique to reduce liver
ischemia-reperfusion injury, once it increased antioxidants substances and
reduced the damage.
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