Staurosporine (ST), a protein kinase C inhibitor, was found to produce antitumor effects against C22.20, a clonal subline derived from colon cancer HT-29 line, selected for low expression of carcinoembryonic antigen (CEA). However, as assessed by FAGS analysis using propidium iodide, no apoptosis or cell cycle alteration was found on day 3 after treatment of C22.20 cells with ST (1-100nM), Exposure of cells to graded concentrations of the drug (i.e,, from 1 to 25nM) resulted in a concentration-dependent increase in the percentage of CEA positive cells, as determined by flow cytometric analysis. However, when higher concentrations (i.e, 50nM - 100nM) of ST were used, the percentage of CEA positive cells declined compared to that detected in 25nM-treated tumor. Since these results were obtained in a clonal cell population, it is reasonable to hypothesize that induction rather than selection mechanism is involved in this phenomenon. The potential clinical interest of the present findings stems from the consideration that treatment with ST or its derivatives could improve sensitivity and efficacy of diagnostic and/or immunotherapeutic approaches based on CEA molecules.

Aquino, A., Prete, S., Baier, S., Cappelletti, D., Greiner, J., DE VECCHIS, L., et al. (2000). Staurosporine increases carcinoembryonic antigen expression in a human colon cancer cell line. JOURNAL OF CHEMOTHERAPY, 12(2), 167-172.

Staurosporine increases carcinoembryonic antigen expression in a human colon cancer cell line

AQUINO, ANGELO;PRETE, SALVATORE;DE VECCHIS, LIANA;GRAZIANI, GRAZIA;BONMASSAR, ENZO
2000-01-01

Abstract

Staurosporine (ST), a protein kinase C inhibitor, was found to produce antitumor effects against C22.20, a clonal subline derived from colon cancer HT-29 line, selected for low expression of carcinoembryonic antigen (CEA). However, as assessed by FAGS analysis using propidium iodide, no apoptosis or cell cycle alteration was found on day 3 after treatment of C22.20 cells with ST (1-100nM), Exposure of cells to graded concentrations of the drug (i.e,, from 1 to 25nM) resulted in a concentration-dependent increase in the percentage of CEA positive cells, as determined by flow cytometric analysis. However, when higher concentrations (i.e, 50nM - 100nM) of ST were used, the percentage of CEA positive cells declined compared to that detected in 25nM-treated tumor. Since these results were obtained in a clonal cell population, it is reasonable to hypothesize that induction rather than selection mechanism is involved in this phenomenon. The potential clinical interest of the present findings stems from the consideration that treatment with ST or its derivatives could improve sensitivity and efficacy of diagnostic and/or immunotherapeutic approaches based on CEA molecules.
2000
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/14 - FARMACOLOGIA
Settore MED/06 - ONCOLOGIA MEDICA
English
Con Impact Factor ISI
CEA; Colon carcinoma; Immunotherapy; Staurosporine
Aquino, A., Prete, S., Baier, S., Cappelletti, D., Greiner, J., DE VECCHIS, L., et al. (2000). Staurosporine increases carcinoembryonic antigen expression in a human colon cancer cell line. JOURNAL OF CHEMOTHERAPY, 12(2), 167-172.
Aquino, A; Prete, S; Baier, S; Cappelletti, D; Greiner, J; DE VECCHIS, L; Graziani, G; Bonmassar, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/51720
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