PCNA Ki-67 dissociation in childhood acute lymphoblastic leukaemia. An immunofluorescent laser confocal scanning microscopical study.

Abstract:

:Cell proliferation rates of diagnostic marrow aspirate cells of 21 children with Acute Lymphoblastic Leukaemia and 16 controls were compared using immunocytochemical labelling of PCNA and Ki-67 antigen as assessed by Confocal Laser Scanning Microscopy. The results showed an unexpected, highly significant degree of dissociation between PCNA and Ki-67 expression in ALL blasts. The PCNA labelling indices of ALL patients were significantly increased (mean 44, range 24-77) compared with normal reactive marrow cells (mean 13.8, range 4-26) (p < 0.000001, Mann Whitney U two tailed test), suggesting an abnormal commitment to proliferation. Ki-67 expression was raised to a lesser extent in ALL cells (mean 14.8, range 1.2-35) when compared to non-malignant proliferations (mean 6.6, range 1.7-25) (p < 0.02). PCNA/Ki-67 LI ratios in ALL (mean 7, range 1.1-35) were higher than in controls (mean 2.7, range 1.04-6.5, p < 0.09). As cell proliferation rates actually achieved in the bone marrow do not differ as strongly as suggested by the extreme difference in PCNA labelling, a pathological dissociation of PCNA/Ki-67 expression exists, suggesting immortalisation.

journal_name

Cell Biol Int

authors

Ball LM,Pope J,Howard CV,Eccles P,van Velzen D

doi

10.1006/cbir.1994.1123

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

869-74

issue

9

eissn

1065-6995

issn

1095-8355

pii

S1065-6995(84)71123-1

journal_volume

18

pub_type

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