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Effect of bcl-2 antisense oligodeoxynucleotides on drug sensitivity of leukemic cells
1Institute of Hematology, Medical College of Jinan University, Guangzhou 510632, People's Republic of China. tzyuan@jnu.edu.cn
Introduction:
We investigated the effect of two antisense oligodeoxynucleotides, previously selected with the help of computer-aided RNA structure prediction, on drug sensitivity, bcl-2 expression and apoptosis of leukemia cells. The drugs tested were etoposide (VP-16), cytarabine (Ara-C), daunorubicin (DNR) and arsenic trioxide (As(2)O(3)).
Materials And Methods:
The experimental assays were performed with cultures, IC(50) of leukemic cells to drugs, immunochemistry and flow cytometry.
Results:
The results showed that the two antisense oligodeoxynucleotides significantly reduced IC(50) levels for VP-16, Ara-c, DNA and As(2)O(3), inhibited bcl-2 gene expression and induced apoptosis of leukemic cells.
Conclusions:
Computational prediction of antisense efficacy is faster than other methods and more cost-efficient. This could hasten the development of sequences for both research and clinical applications.
Insights
Computer-aided antisense oligodeoxynucleotides enhance leukemia cell sensitivity to chemotherapy drugs like etoposide and arsenic trioxide. These sequences also inhibit bcl-2 expression and promote apoptosis, offering a faster, cost-effective approach for cancer treatment development.
Area of Science:
- Molecular Biology
- Cancer Research
- Bioinformatics
Background:
- Investigated the impact of two antisense oligodeoxynucleotides on leukemia cell drug sensitivity, bcl-2 expression, and apoptosis.
- Utilized computer-aided RNA structure prediction for antisense sequence selection.
- Tested effects in conjunction with etoposide (VP-16), cytarabine (Ara-C), daunorubicin (DNR), and arsenic trioxide (As(2)O(3)).
Purpose of the Study:
- To evaluate the efficacy of computer-selected antisense oligodeoxynucleotides in modulating leukemia cell response to chemotherapy.
- To determine if these antisense sequences could enhance drug sensitivity and induce apoptosis.
- To assess the impact on bcl-2 gene expression in leukemia cells.
Main Methods:
- Cultured leukemia cells were treated with antisense oligodeoxynucleotides and various chemotherapeutic agents.
- Assessed drug sensitivity using IC(50) (half-maximal inhibitory concentration) values.
- Employed immunochemistry and flow cytometry to analyze bcl-2 expression and apoptosis levels.
Main Results:
- Antisense oligodeoxynucleotides significantly reduced IC(50) levels for VP-16, Ara-C, DNR, and As(2)O(3).
- Demonstrated inhibition of bcl-2 gene expression in treated leukemia cells.
- Successfully induced apoptosis in leukemia cells.
Conclusions:
- Computational prediction of antisense efficacy is a rapid and cost-effective method.
- This approach can accelerate the development of novel antisense sequences for both research and clinical applications.
- Antisense oligodeoxynucleotides show promise in improving leukemia treatment strategies.