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Characterization of a familial RCC-associated t(2;3)(q33;q21) chromosome translocation
J Podolski1, T Byrski, S Zajaczek
1Department of Human Ecology, University of Szczecin, Poland.
Journal of Human Genetics
|January 5, 2002
Summary
A rare chromosome translocation, t(2:3)(q33;q21), was found in a Polish family with multifocal clear cell renal carcinoma, suggesting a potential genetic link to kidney cancer.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- Multifocal clear cell renal carcinoma (ccRCC) is a kidney cancer subtype.
- Familial cancer syndromes can be linked to specific chromosomal abnormalities.
- A similar translocation, t(2;3)(q35;q21), has been previously associated with ccRCC in a Dutch family.
Purpose of the Study:
- To investigate the genetic basis of ccRCC in a Polish family with a t(2:3)(q33;q21) translocation.
- To physically map the breakpoints of the translocation and identify potentially altered genes.
Main Methods:
- Bacterial artificial chromosome (BAC) contig construction and sequencing around translocation breakpoints.
- Physical mapping of known genetic markers, genes, and expressed sequence tags (ESTs).
Main Results:
- The 2q breakpoint region contained two single ESTs.
- The 3q breakpoint region was gene-poor and repeat-rich, mapping to 3q13.
- The 2q breakpoint was located telomeric to the FRA2G site (2q31).
Conclusions:
- The identified t(2:3)(q33;q21) translocation in a ccRCC family shares similarities with a previously reported translocation.
- Further characterization of ESTs near the 2q breakpoint is needed to determine if gene alteration contributes to familial kidney cancer.