TY - JOUR
T1 - Induction of Apoptosis by Erbstatin in Mouse Leukemia L1210 Cells
AU - Simizu, Siro
AU - Imoto, Masaya
AU - Umezawa, Kazuo
N1 - Funding Information:
Acknowledgments. This work was partly supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Science, and Culture of Japan and the Life Science Foundation of Japan.
PY - 1994
Y1 - 1994
N2 - Erbstatin, a tyrosine kinase inhibitor, has antitumor activity on L1210 mouse leukemia. We tried to find the mechanism of this cytotoxic effect of erbstatin. Erbstatin increased trypan blue exclusion in cultured LI210 cells. The cytotoxic action of erbstatin was accompanied with shrinking of the cells and internucleosomal DNA fragmentation, characteristics of apoptosis. The DNA fragmentation was induced with other tyrosine kinase inhibitors as well, methyl 2,5-dihydroxycinnamate and herbimycin A. In addition, intracellular tyrosine phosphorylation was inhibited by erbstatin before cell death. Erbstatin-induced DNA fragmentation was prevented by zinc ions, but not by cycloheximide or 12-O-tetradecanoylphorbol 13-acetate (TPA). Thus, erbstatin induced apoptotic cell death in L1210 cells by inhibiting tyrosine kinase.
AB - Erbstatin, a tyrosine kinase inhibitor, has antitumor activity on L1210 mouse leukemia. We tried to find the mechanism of this cytotoxic effect of erbstatin. Erbstatin increased trypan blue exclusion in cultured LI210 cells. The cytotoxic action of erbstatin was accompanied with shrinking of the cells and internucleosomal DNA fragmentation, characteristics of apoptosis. The DNA fragmentation was induced with other tyrosine kinase inhibitors as well, methyl 2,5-dihydroxycinnamate and herbimycin A. In addition, intracellular tyrosine phosphorylation was inhibited by erbstatin before cell death. Erbstatin-induced DNA fragmentation was prevented by zinc ions, but not by cycloheximide or 12-O-tetradecanoylphorbol 13-acetate (TPA). Thus, erbstatin induced apoptotic cell death in L1210 cells by inhibiting tyrosine kinase.
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U2 - 10.1271/bbb.58.1549
DO - 10.1271/bbb.58.1549
M3 - Article
AN - SCOPUS:85007735896
VL - 58
SP - 1549
EP - 1552
JO - Bioscience, Biotechnology and Biochemistry
JF - Bioscience, Biotechnology and Biochemistry
SN - 0916-8451
IS - 9
ER -