Amplification of the translocated c-myc genes in three Burkitt lymphoma cell lines.
Amplification of the translocated c-myc genes in three Burkitt lymphoma cell lines.
复制标题
三种伯基特淋巴瘤细胞系中易位的 c-myc 基因的扩增。
DOI:
10.1016/s0378-1119(98)00104-8
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发表时间:
1998
期刊:
影响因子:
3.5
通讯作者:
Leffak,M
中科院分区:
文献类型:
--
作者:
Khaira,P;James,CD;Leffak,M
Translocations of the coding exons of the human c-myc gene are consistent features of human Burkitt lymphomas (BL). In the BL cell lines CA46, JD40, and ST486, the second and third c-myc exons have been translocated into the immunoglobulin heavy chain locus. In addition to this rearrangement, in all three cell lines, we have found that the translocated c-myc exons show low-level amplification relative to restriction fragments from the germ-line c-myc gene. The patterns of hybridization of an IgM switch region probe suggest that immunoglobulin heavy chain sequences have been co-amplified with the translocated c-myc sequences. Differential sedimentation was used to determine whether the amplified sequences reside in high-molecular-weight chromosomes or low-molecular-weight extrachromosomal DNA. In JD40 and ST486 cells, the amplified c-myc sequences were found on high-molecular-weight chromosomes; ST486 cells also contained translocated c-myc sequences in low-molecular-weight, extrachromosomal DNA, as did CA46 cells. These conclusions were corroborated by fluorescence in-situ hybridization (FISH) of HeLa, CA46, ST486 and JD40 metaphase chromosomes. These results suggest that there is ongoing selection for cells containing amplified copies of the expressed c-myc sequences, and that there is continuous generation of extrachromosomal copies of the translocated c-myc sequences in ST486 and CA46 cells.
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DOI:
10.1073/pnas.80.8.2146
发表时间:
1983
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
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影响因子:
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通讯作者:
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