Comparison of the therapeutic effects of tri-iodothyronine and methylprednisolone during early sepsis in laboratory animals

Despite major advances, the treatment of sepsis is still a challenging problem for surgeons. This study was aimed to compare the therapeutic effects of methylprednisolone and tri-iodothyronine replacement therapy during an early sepsis. Forty male Wistar albino rats weighing 300-340 g were divided into the Control, CLP, CLP/MP, CLP/T3 and CLP/MP/T3 groups. The Control group underwent a sham operation. Only cecal ligation and puncture was performed in the CLP group. The CLP/MP groups received an intramuscular injection of (MP) methylprednisolone (30 mg/kg) at one and half hour before CLP. The CLP/T3 group was given an intraperitoneal (IP) injection of tyroid hormone (T3) 0.4 µg/100 g immediately after CLP. The CLP/MP/T3 group was given IM injection of MP 30 mg/kg before CLP and IP injection of T3 0.4 µg/100 g after CLP. Hemavet changes, blood cultures, peritoneal bacteria content, hormonal alterations and histopathologic changes of intestinal, lung and liver tissue were used to asses the possible therapeutic effects of MP and T3 during early sepsis. A septic insult resulted in significant alterations on hemavet values, free T3, free T4 and cortisol levels, peritoneal bacteria content and intestinal lung and liver tissue samples of the CLP group. Hemavet changes and peritoneal inflammation findings were significantly limited in the CLP/T3 and CLP/MP/T3 groups. Histopathologic changes had no significant difference between the groups during an early sepsis. Compared to the MP replacement therapy, therapeutic effects of T3 replacement therapy have been found significantly more promising (Tab. 1, Fig. 10, Ref. 49).