Abstract
It is unclear whether a subunit of glutamate cysteine ligase [a modifier subunit (GCLM) and a catalytic subunit (GCLC)] is an effective target for ameliorating cisplatin (CDDP)-resistance. We inhibited each subunit of GCL mRNA using a specific ribozyme (M-Rz and C-Rz) in the pulmonary adenocarcinoma cell line A549. GCL activity was suppressed by the ribozyme. CDDP-resistance was more effectively ameliorated when GCLM rather than GCLC was inhibited. GCLM is a potentially more effective pharmacologic target for ameliorating CDDP-resistance in non-small cell lung cancer than GCLC.
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