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D,L‐α‐DIFLUOROMETHYLORNITHINE, AN IRREVERSIBLE INHIBITOR OF ORNITHINE DECARBOXYLASE, INDUCES DIFFERENTIATION IN MEL CELLS
Author(s) -
Choudhary Shailesh Kumar,
Sharma Dipali,
Dixit Aparna
Publication year - 1999
Publication title -
cell biology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.932
H-Index - 77
eISSN - 1095-8355
pISSN - 1065-6995
DOI - 10.1006/cbir.1999.0398
Subject(s) - benzidine , ornithine decarboxylase , microbiology and biotechnology , chemistry , cellular differentiation , staining , cell culture , biology , biochemistry , enzyme , genetics , gene
In the present study, the effect of D,L‐α‐difluoromethylornithine (DFMO), an irreversible inhibitor of ornithine decarboxylase (ODC), on Friend's murine erythroleukemia (MEL) cell differentiation is investigated. DFMO was able to induce differentiation of MEL cells in culture as determined by haemoglobin (Hb) content and percentage of cells synthesizing Hb detected by benzidine staining. DFMO at a concentration of 2m m resulted in about 70% benzidine‐positive cells on the fifth day. There was a time‐dependent increase in the percentage of benzidine‐positive cells starting from day three. However, only a 24h presence of DFMO in the medium was required to induce differentiation suggesting that DFMO switches on a pathway during this period leading to terminal differentiation of MEL cells. DFMO induced differentiation of MEL cells was sensitive to dexamethasone and 5‐bromo‐2′‐deoxyuridine.