Title : Enhanced production of intracellular ara-CTP after sequential use of methotrexate and 1-beta-D-arabinofuranosylcytosine.

Pub. Date : 1985

PMID : 4068748






7 Functional Relationships(s)
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1 In this experiment, the intracellular ara-CTP was measured by HPLC after MTX and ara-C were sequentially administered to BDF1 mice bearing L1210 leukemic cell, either being sensitive or resistant to MTX. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
2 When MTX at the dose of 12 mg/kg was preceded 6 h and 3 h to ara-C at the dose of 25 mg/kg, the intracellular levels of ara-CTP were found to be significantly higher as compared with those of ara-C alone as control group. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
3 At 1 h after ara-C, ara-CTP was measured about 165 and 130% of the control levels, respectively, and at 12 h, ara-CTP was over 4 times higher of control level with group of mice to which MTX was preceded 6 h prior to MTX. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
4 At 1 h after ara-C, ara-CTP was measured about 165 and 130% of the control levels, respectively, and at 12 h, ara-CTP was over 4 times higher of control level with group of mice to which MTX was preceded 6 h prior to MTX. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
5 On the contrary, the enhancement of ara-CTP production was definitely diminished with MTX-resistant cells in the same administrative model. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
6 From our present experiment, the time sequential modulation of intracellular ara-CTP production by MTX was reconfirmed in vivo, and this modulation might depend upon the sensitivity of MTX of leukemic cells. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus
7 From our present experiment, the time sequential modulation of intracellular ara-CTP production by MTX was reconfirmed in vivo, and this modulation might depend upon the sensitivity of MTX of leukemic cells. Arabinofuranosylcytosine Triphosphate metaxin 1 Mus musculus