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Related Experiment Videos

Abnormal flow cytometry profiles in patients with interstitial cystitis

W Bushman1, C Goolsby, J T Grayhack

  • 1Department of Urology, Northwestern University Medical School, Chicago, Illinois.

The Journal of Urology
|December 1, 1994
PubMed
Summary

Flow cytometry revealed aneuploid DNA profiles in 29% of interstitial cystitis patients, suggesting potential epithelial cell abnormalities. DNA tetraploidy observed was attributed to binucleated cells, not true aneuploidy.

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Area of Science:

  • Urology
  • Cell Biology
  • Oncology

Background:

  • Interstitial cystitis (IC) is a chronic condition characterized by bladder pain and urinary urgency.
  • The cellular and molecular underpinnings of IC remain incompletely understood.
  • Investigating epithelial cell DNA content may offer insights into IC pathogenesis.

Purpose of the Study:

  • To analyze deoxyribonucleic acid (DNA) profiles of bladder epithelial cells from IC patients and controls using flow cytometry.
  • To identify potential DNA abnormalities, including aneuploidy and tetraploidy, in IC patient samples.
  • To explore the significance of observed DNA profiles in relation to IC.

Main Methods:

  • Flow cytometry was utilized to analyze bladder cell DNA content from 14 IC patients and 11 control subjects.

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  • Propidium iodide staining was employed for DNA analysis.
  • Cytokeratin gating was used to focus analysis on epithelial cells, with restrictions for sample quality.

    • Main Results:

    • Aneuploid DNA profiles (DNA index ≥ 1.2) were detected in 4 of 14 (29%) IC patients, absent in controls.
    • These aneuploid peaks constituted up to 54% of the cytokeratin-positive cell population in affected IC patients.
    • Apparent DNA tetraploidy (4C peak > 20%) was observed in both IC patients (43%) and controls (72%), but attributed to binucleated cells.

    Conclusions:

    • Aneuploid DNA profiles in IC patients may indicate true karyotypic abnormalities, altered chromosome complements, or issues with DNA staining.
    • The presence of aneuploidy in IC bladder cells could signify an underlying epithelial cell abnormality.
    • Further research is warranted to elucidate the role of aneuploidy in interstitial cystitis pathogenesis.