Chromatin-bound PCNA as S-phase marker in mononuclear blood cells of patients with acute lymphoblastic leukaemia or multiple myeloma

F. Zölzer, O. Basu, P. U. Devi, S. P. Mohanty, C. Streffer

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7 Citations (Scopus)


Objectives: Proliferating cell nuclear antigen (PCNA) has often been used as a marker to aid assessment of tumour growth fraction. This paper addresses the question of whether it can be used as an S-phase marker, when the non-chromatin-bound form of the protein is removed by pepsin treatment.Materials and methods: Cytofluorometric measurements were carried out after immunofluorescence staining of PCNA and counterstaining of DNA. S-phase fraction was determined with the help of windows on PCNA versus DNA scattergrams, or mathematically from DNA histograms.Results: S-phase fractions obtained using the two methods correlated well, but did not always agree, exact discrepancies depending on the mathematical model used for histogram analysis.Conclusions: Determination of S-phase fractions with the help of PCNA immunofluorescence staining is possible, and probably more reliable than calculation of S-fractions from DNA histograms. It thus offers an alternative to assays involving BrdU labelling in vivo.

Original languageEnglish
Pages (from-to)579-583
Number of pages5
JournalCell Proliferation
Issue number6
Publication statusPublished - 01-12-2010


All Science Journal Classification (ASJC) codes

  • Cell Biology

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