Antisense nucleic acid medicine composition with bcr3/abl2 and VEGF gene function inhibition and use thereof
An antisense nucleic acid and gene function technology, which is applied in the field of preparation of drugs for the treatment of leukemia, can solve the problems of human normal cytotoxicity and lack of specificity, and achieve the prevention of drug resistance of tumor drug-resistant cells, strong specificity, and reduced Effects of Drug Dose and Toxicity
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[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0022] 1. Design and synthesis of ASO
[0023] ① Thio-modified bcr3 / abl2 antisense oligonucleotides (ASO-b / a) are complementary to 9 nucleotides on both sides of the bcr3 / abl2 fusion point (Skorski T, Szczylick C, Malaguamera L, et al. Folia Histochem Cytobiol, 1991, 29: 85-89), the sequence is: 5'-GAAGGGCTTTTGAACTCT-3'.
[0024] ②Antithio-modified VEGF antisense oligonucleotide (ASO-V) is complementary to the third exon of VEGF mRNA (Li XM, Tang ZY, Zhou G, et al.J Exp Clin Cancer Res, 1998, 17 : 1-3), the sequence is: 5'-GCAGTAGCTGCGCTGATAGTGC-3'.
[0025] ③ The sequence of the irrelevant antisense oligonucleotide (N-ODN) is: 5'-CATTTCTTGCTCTCCACG-3', which has no homology with human genes including bcr / abl and VEGF genes after searching by computer.
[0026] 2. Cell culture and transfection
[0027] The K562 cell line is a cell line deriv...
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