Validation and development of quantitative flow cytometry-based fluorescence in situ hybridization for intercenter comparison of telomere length measurement

Ka Wai Helen Law, Yu Lung Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


Background: Telomeres are highly conserved repeats at the ends of chromosomes that maintain chromosome stability and reflect the replicative potential of cells. Telomere length can be determined by Southern blot hybridization or quantitative fluorescence in situ hybridization (Q-FISH). Recently, two flow cytometry-based (Flow) FISH protocols have been published. Methods: We compared the telomere length measured by Southern blotting and Flow FISH using standard beads to calibrate and quantify the fluorescence intensity. Results: The telomeric fluorescence of cord blood and peripheral blood mononuclear cells was similar to that reported by other studies. There was a linear relationship between the telomeric fluorescence determined by Flow FISH and the telomere fragment size determined by Southern blotting (r = 0.89; P < 0.001). Conclusion: It is important to set up a center-specific curve and select appropriate cell lines for reference. This Q-Flow FISH protocol will facilitate the measurement of telomere length and allow more meaningful comparison of data (in standard fluorescence units or fragment size) between institutes.
Original languageEnglish
Pages (from-to)150-153
Number of pages4
Issue number2
Publication statusPublished - 1 Feb 2001
Externally publishedYes


  • Cell analysis
  • Flow cytometry
  • Fluorescence in situ hybridization
  • Nucleic acid hybridization
  • Peptide nucleic acid
  • Q-Flow FISH
  • Telomere
  • Telomere length

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Biophysics
  • Hematology
  • Endocrinology
  • Cell Biology

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