Detection of amplified genomic sequences in human small-cell lung carcinoma cells by arbitrarily primed-PCR genomic fingerprinting.

Abstract:

:The arbitrarily primed-PCR (AP-PCR) genomic fingerprinting method was applied to evaluate its effectiveness in detecting and characterizing amplified DNA fragments in two small-cell lung carcinoma (SCLC) cell lines, NCI-H69 and NCI-H82. Of the 2428 DNA fragments detected by AP-PCR using 62 arbitrary primers, 2 (0.08%) DNA fragments were amplified in NCI-H69 and 6 (0.25%) DNA fragments were amplified in NCI-H82. Based on these results, we estimate the total size of the amplified genomic regions in these cell lines to be 3000 megabase pairs (Mb) x 0.0008 = 2.4 Mb in NCI-H69 and 3000 Mb x 0.0025 = 7.5 Mb in NCI-H82. The 2 amplified fragments in NCI-H69 were mapped to chromosome 2, and all 6 amplified fragments in NCI-H82 were mapped to chromosome 8. This strongly suggests that restricted chromosomal regions are specifically amplified in these SCLC cell lines. Since the N-myc gene at 2p24 is amplified in NCI-H69 and the c-myc gene at 8q24 is amplified in NCI-H82, it is possible that these DNA fragments are co-amplified with N-myc or c-myc in these cell lines. However, since the 2 amplified fragments in NCI-H69 were not amplified in 42 other human cancer cell lines including 11 cell lines carrying amplified N-myc genes, it is also possible that there are amplified regions on chromosome 2 other than the N-myc locus at 2p24 in NCI-H69. In contrast, all 6 amplified fragments in NCI-H82 were amplified in several other human cancer cell lines carrying amplified c-myc genes. This result further indicates that these fragments were derived from an amplification unit that includes the c-myc gene. Our results show the ability of the AP-PCR method to analyze the fraction of the genome with amplification in human cancer cells.

journal_name

Hum Genet

journal_title

Human genetics

authors

Okazaki T,Takita J,Kohno T,Handa H,Yokota J

doi

10.1007/s004390050203

subject

Has Abstract

pub_date

1996-09-01 00:00:00

pages

253-8

issue

3

eissn

0340-6717

issn

1432-1203

journal_volume

98

pub_type

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