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Aim  To investigate the impact of alpha subunit of eukaryotic initiation factor 2 (eIF2α) phosphorylation on liver regeneration.    Methods  Male BALB/c mice were intraperitoneally injected with carbon tetrachloride (CCl 4 ) to induce liver injury. Human hepatocyte LO2 cells were incubated with thapsigargin to induce endoplasmic reticulum (ER) stress. Salubrinal, integrated stress response inhibitor (ISRIB), and DnaJC3 overexpression were used to alter eIF2α phosphorylation levels.    Results  CCl 4  administration induced significant ER stress and eIF2α phosphorylation, and increased hepatocyte proliferation proportionally to the extent of injury. Inhibiting eIF2α dephosphorylation with salubrinal pretreatment significantly mitigated liver injury and hepatocyte proliferation. In LO2 cells, thapsigargin induced significant eIF2α phosphorylation and inhibited proliferation. Inhibiting eIF2α dephosphorylation partly restored cell proliferation during ER stress.    Conclusions  In acute liver injury, inhibiting eIF2α dephosphorylation protects injured hepatocytes and reduces hepatocyte proliferation.

croatian medical journal

Inhibiting alpha subunit of eukaryotic initiation factor 2 dephosphorylation protects injured hepatocytes and reduces hepatocyte proliferation in acute liver injury