alexa Enhancement of the cytolytic effect of anti-bacterial cecropin by the microvilli of cancer cells.
General Science

General Science

Biological Systems: Open Access

Author(s): Chan SC, Hui L, Chen HM

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Abstract A comparison between IC50s of cecropin B on tumor cells such as KG-1 leukemia and Ags stomach carcinoma and non-tumor cells like fibroblasts and red blood cells was conducted. The IC50s of cecropin B for KG-1 leukemia and Ags carcinoma cells were 20.8 +/- 2.3 microM (MTT) and 18.9 +/- 3.3 microM (trypan blue) and 16.0 +/- 3.5 microM (MTT) & 15.3 +/- 3.7 microM (trypan blue), respectively. The IC50 of cecropin B for 3T6 fibroblast cells was 92.0 +/- 9.1 microM by MTT assay and the HE50 of cecropin B for human red blood cells was 180.0 +/- 20.1 microM at OD414nm. The cytolysis induced by cecropin peptides was more effective for the cancer cells than for the normal cells. Based on the observations from scanning electron microscopy, this may mainly due to the cancer cells having a high population of the irregular microvilli on the cell surface. Since peptides bound to the cell membrane are non-specific, the attraction of peptides by microvilli may be one of the main driving forces before the lysis in membrane bilayers can be efficiently initiated.
This article was published in Anticancer Res and referenced in Biological Systems: Open Access

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