Antisense oligodeoxyribonucleotide down-regulation of bcl-2 gene expression inhibits growth of the low-grade non-Hodgkin's lymphoma cell line WSU-FSCCL.
The BCL-2 gene product is involved in preventing apoptosis. The t(14,18) chromosomal translocation, which results in a fusion messenger RNA containing the entire coding region of BCL-2 and a portion of the immunoglobulin heavy chain gene, is commonly found in follicular lymphoma and appears to play a role in lymphomagenesis by inhibiting cell death. We tested the hypothesis that downregulation of BCL-2 would decrease accumulation of follicular lymphoma cells by treating the t(14,18)-carrying follicular lymphoma cell line WSU-FSCCL in vitro with antisense oligodeoxyribonucleotides (ODNs) directed against BCL-2. We found dose-dependent, sequence-specific inhibition of cell accumulation by an antisense unmodified ODN directed at codons 2 to 7, which downregulated BCL-2 protein levels. This effect was near maximal at an ODN concentration of 40 micrograms/mL (6.9 mumol/L), with minimal toxicity by control sense, reverse, and mutated antisense ODN at the same concentration. The pre-B leukemia cell line REH showed no sequence-specific growth inhibition by the antisense ODN at these concentrations, and BCL-2 protein levels were not altered. These data suggest that WSU-FSCCL may be useful in a murine model to optimize antisense ODN for potential therapeutic utility.
Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA.
M R
MR
Smith
Y
Y
Abubakr
R
R
Mohammad
T
T
Xie
M
M
Hamdan
A
A
al-Katib
D001483:Base Sequence; D002455:Cell Division; D004305:Dose-Response Relationship, Drug; D015536:Down-Regulation / Q000235:genetics; D005434:Flow Cytometry; D006801:Humans; D007150:Immunohistochemistry; D008228:Lymphoma, Non-Hodgkin / Q000188:drug therapy* / Q000235:genetics* / Q000473:pathology; D008969:Molecular Sequence Data; D016376:Oligonucleotides, Antisense / Q000737:chemistry / Q000235:genetics / Q000494:pharmacology*; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D019253:Proto-Oncogene Proteins c-bcl-2; D014407:Tumor Cells, Cultured
D016376:Oligonucleotides, Antisense; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2