Background: Different lesions may affect the liver resulting in harmful stimuli. Some
therapeutic procedures to treat those injuries depend on liver regeneration to
increase functional capacity of this organ. Aim: Evaluate the effects of tranexamic acid on liver regeneration after partial
hepatectomy in rats. Method: 40 rats (Rattus norvegicus albinus, Rodentia mammalia) of
Wistar-UP lineage were randomly divided into two groups named control (CT) and
tranexamic acid (ATX), with 20 rats in each. Both groups were subdivided,
according to liver regeneration time of 32 h or seven days after the rats had been
operated. The organ regeneration was evaluated through weight and histology,
stained with HE and PCNA. Results: The average animal weight of ATX and CT 7 days groups before surgery were 411.2 g
and 432.7 g, and 371.3 g and 392.9 g after the regeneration time, respectively.
The average number of mitotic cells stained with HE for the ATX and CT 7 days
groups were 33.7 and 32.6 mitosis, and 14.5 and 14.9 for the ATX and CT 32 h
groups, respectively. When stained with proliferating cell nuclear antigen, the
numbers of mitotic cells counted were 849.7 for the ATX 7 days, 301.8 for the CT 7
days groups, 814.2 for the ATX 32 hand 848.1 for the CT 32 h groups. Conclusion: Tranexamic acid was effective in liver regeneration, but in longer period after
partial hepatectomy.