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Jumping translocations originate clonal rearrangements in SV40-transformed human fibroblasts

✍ Scribed by F. Hoffschir; M. Ricoul; N. Lemieux; S. Estrade; R. Cassingena; B. Dutrillaux

Book ID
102865464
Publisher
John Wiley and Sons
Year
1992
Tongue
French
Weight
817 KB
Volume
52
Category
Article
ISSN
0020-7136

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✦ Synopsis

A comparative study of chromosomal rearrangements occurring in 4 independent clones obtained from SV40-transformed cornea and skin human fibroblasts was performed. Rearrangements principally affect some constitutive heterochromatin and, to a lesser degree, telomeric regions. This results in multiple exchanges between a limited number of chromosome structures, i.e., in jumping translocations. Such rearrangements occur even at early passages and some of them give rise to clonal rearrangements that accumulate at late passages. This process is responsible for progressive modification of the karyotypes, principally characterized by deletion of a number of chromosome segments. Thus, clonal rearrangements are selected among many others not occurring at random. The selective pressure retaining clonal rearrangement seems to be similar for the 4 independent clones, since selection of the

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