RESUMO
tuftsin,a physiologically active peptide,can promote phagocytosis,basically stimulates the macrophages or neutro-phils and improve their phagocytotic function.tuftsin can not di-rectly kill tumor cells.Due to its short structure and the charac-teristics of being susceptible to hydrolysis,it is difficult for tuft-sin to be made into medicine and applied clinically.However, derivatives of tuftsin-series and combination of tuftsin with other drugs can greatly enhance the cytotoxic effect on tumor cells of tuftsin.It has a broad prospect of research,especially deriva-tive-TP has a significant anti-tumor effect.Its mechanism is clear and its is expected to become a new type of anti-tumor bio-logical response regulator.
RESUMO
Aim To investigate the effect of TP on the expression of macrophages inflammatory protein ( MIP-1α) . Methods Total RNA of mouse Ana-1 cells and tumor associated macrophages were extracted, and MIP-1α mRNA was detected by RT-PCR. Mouse S180-xenografts were established by injecting S180 cells subcutaneously into the double abdominal flanks of the mice. The postoperative residual tumor models were generated in the right abdominal tumors when tumors grew into 250 mm3 . Animals were treated with TP or CTX, and tumor tissues were separated and MIP-1α was detected by immunohistochemistry. Results There was no significant difference of the expression of MIP-1α between Ana-1 cells and TAMs. TP couldn’ t affect MIP-1αexpression in Ana-1 cells while it signifi-cantly decrease MIP-1α expression in TAMs in a dose-dependent manner. TP significantly decreased MIP-1αexpression of tumor tissue compared with control group. Conclusions MIP-1α will be a new target of TP anti-cancer. Simple cell line tests in vitro couldn’ t reveal the real state in vivo.