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Related Experiment Videos

Clonal chromosome changes in non-neoplastic ureters

R Casalone1, E Minelli, R Righi

  • 1Biologia Generale e Genetica Medica, Università di Pavia, Italy.

Cancer Genetics and Cytogenetics
|August 1, 1995
PubMed
Summary

Cytogenetic analysis of non-neoplastic ureters revealed clonal chromosome abnormalities in eight samples. The Y chromosome was notably involved, showing loss or duplication in several cases.

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Area of Science:

  • Urology
  • Cytogenetics
  • Oncology

Background:

  • Non-neoplastic ureters are typically considered cytogenetically normal.
  • Understanding baseline chromosomal status is crucial for detecting early neoplastic changes.

Purpose of the Study:

  • To investigate the presence and types of clonal chromosome abnormalities in non-neoplastic ureter samples.
  • To characterize the cellular origin of any observed abnormalities.

Main Methods:

  • Cytogenetic analysis (karyotyping) on 23 non-neoplastic ureter samples.
  • Immunohistochemical analysis and inverted microscopy for cell typing.
  • Fluorescence in situ hybridization (FISH) for specific chromosome analysis (chromosome 7).

Main Results:

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  • Clonal chromosome abnormalities were detected in 8 out of 23 samples.
  • The Y chromosome was frequently involved, with loss (5 cases) or duplication (1 case) observed.
  • Other sporadic numerical and structural abnormalities were found in 9 cases.
  • Fibroblastic cells were the predominant cell type identified.
  • FISH analysis did not detect trisomy 7 in epithelial cells.

Conclusions:

  • Non-neoplastic ureters can harbor clonal chromosome abnormalities, particularly involving the Y chromosome.
  • These findings establish a baseline for cytogenetic alterations in normal ureteral tissue.
  • Further research is needed to determine the clinical significance of these findings.