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  • Title: Refining a proximal breakpoint cluster at chromosome 3p11.2 in non-papillary renal cell carcinomas.
    Author: Bugert P, Kenck C, Wilhelm M, Kovacs G.
    Journal: Int J Cancer; 1996 Dec 11; 68(6):723-6. PubMed ID: 8980173.
    Abstract:
    Our previous cytogenetic and microsatellite analyses showed a terminal deletion of chromosome 3p segments with a breakpoint region between 3p11.2 and 3p14.1 bands in 98% of non-papillary renal cell carcinomas (RCC). This breakpoint region covers approx. 20-25 cM genetic distance. Earlier, we found a higher frequency of rearrangements at chromosome 3p11.2 and have therefore now analyzed 74 sporadic and 26 VHL-associated RCCs with 6 polymorphic microsatellite markers mapped to this region. Thirty-three per cent of the breakpoints were mapped to a genetic distance of less than one-twentieth of the large breakpoint region 3p11.2-14.1. We suggest that unstable DNA sequences at chromosome 3p11.2 serve as a genetic basis for deletions and homologous and non-homologous recombinations to remove distal 3p sequences with one copy of RCC gene(s) in different types of tumors. We have identified a YAC clone 909d5 that spans the most frequently occurring breaks between loci D3S1251, D3S1101, and D3S1552 and allows this region to be cloned.
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