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Disorganization of microtubular network in postischemic liver dysfunction: its functional and morphological changes
H Shinohara1, A Tanaka, T Fujimoto
1Second Department of Surgery, Faculty of Medicine, Kyoto University, Japan.
Biochimica Et Biophysica Acta
|October 7, 1996
Summary
Liver ischemia and reperfusion disrupt microtubule networks, impairing liver function. Recovery of microtubules at 24 hours correlates with restored liver function, suggesting their critical role in postischemic liver health.
Area of Science:
- Hepatology
- Cell Biology
- Surgical Research
Background:
- Microtubules facilitate intracellular transport in hepatocytes.
- Microtubules are labile and susceptible to cellular damage.
- Ischemia/reperfusion injury is a significant cause of postischemic liver dysfunction.
Purpose of the Study:
- To investigate the role of ischemia/reperfusion-induced cytoskeletal alterations in postischemic liver dysfunction.
- To assess the impact of microtubule integrity on liver function after ischemia/reperfusion.
Main Methods:
- Rabbit livers were subjected to 60 minutes of warm ischemia followed by 1 or 24 hours of reperfusion.
- Liver function was measured by indocyanine green (ICG) clearance using near-infrared spectroscopy.
- Microtubule structural integrity was assessed immunohistochemically using anti-beta-tubulin antibody.
Main Results:
- ICG clearance was impaired at 1 hour postreperfusion but recovered at 24 hours.
- Microtubule fragmentation was observed after ischemia and at 1 hour postreperfusion.
- Treatment with prostaglandin E1 preserved both ICG clearance and microtubule integrity.
Conclusions:
- Liver ischemia and reperfusion disrupt the microtubular network in hepatocytes.
- Disruption of microtubules is associated with impaired liver function following ischemia/reperfusion.
- Maintaining microtubule integrity may be a therapeutic strategy for postischemic liver injury.