[Study on inflammatory effect of toxic raphides from Pinellia ternate and its correlation with macrophages].

OBJECTIVE

To study the toxic mechanism of toxic raphides from Pinellia ternata.

METHOD

Mouse peritoneal macrophage in vitro culture model was adopted to study dose-dependent and time-dependent curves of toxic raphides, with TNF-alpha, IL-1beta and IL-6 in supernatant as indexes. Scanning electron microscopy was used to observe the changes in surface morphology of raphides-treated macrophages. Macrophages-neutrophils co-cultured the transport model to study the effect of toxic raphides' stimulation of macrophages on neutrophils migration.

RESULT

Toxic raphides' stimulation of macrophages could cause the increase in the levels of TNF-alpha, IL-1beta and IL-6 released, and showed dose dependence and time dependence. Scanning electron microscopy showed that toxic raphides were swallowed by macrophages, with notable cell membrane creases, increase in the number of pseudopods and decrease in integrity of cell membranes, and could significantly induce migration of neutrophils.

CONCLUSION

The inflammatory process induced by toxic raphides is mainly mediated by macrophages. The toxic mechanism of toxic raphides from P. ternata is that toxic raphides penetrate into tissues to activate resident macrophages, release phagocytic and inflammatory cytokines, and cause migration of neutrophils, which finally results in acute inflammatory response.