摘要：We have developed a septic shock model in mice by sequential administration of β-glucan, a biological response modifier, and indomethacin (IND), a nonsteroidal anti-inflammatory drug. Lethality was significantly related to the translocation of gut flora to various organs and mal-adjustment of the cytokine network. In the present study, we have examined the effect of antibiotics on this model to further clarify meanings of microbial flora. Schizophyllan (SPG), antitumor β-glucan for clinical use, obtained from the culture filtrate of Schizophyllum commune , was used to induce sepsis. Lincomycin (LCM), imipenem (IPM), cilastatine (CS), and ampicillin (ABPC) were used for antibiotics treatment. The survival rate of SPG/IND-treated mice was significantly increased by administering LCM or ABPC/IPM/CS, and the effect was more significant by LCM. In in vitro spleen cell culture, LCM decreased proinflammatory cytokine production. Moreover, prednisolone, immune suppresser treatment improved survival of SPG/IND-treated mice. These findings suggest that LCM is an effective antibiotic in this endogenous septic model by modulating gut microbial flora and, at least a part, by regulating cytokine production of leukocytes.
