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Previous Article | Table of Contents | Next Article 
p53 gene deletion predicts for poor survival and non-response to therapy
with purine analogs in chronic B-cell leukemias
H Dohner, K Fischer, M Bentz, K Hansen, A Benner, G Cabot, D Diehl, R Schlenk, J Coy and S Stilgenbauer
Medizinische Klinik, University of Heidelberg, Germany.
Conventional cytogenetic analysis in B-cell chronic lymphocytic leukemia
(B-CLL) has been very difficult, and the prognostic significance of
specific chromosome aberrations is under discussion. Recent improvements in
fluorescence in situ hybridization (ISH) techniques have provided an
alternative approach for the detection of chromosome aberrations. Here, an
interphase cytogenetic study was performed to analyze the incidence and
prognostic significance of a p53 gene deletion in B-CLL and related
disorders. We studied mononuclear cells from 100 patients with chronic
B-cell leukemias [B-CLL, 90 patients; B-prolymphocytic leukemia (B-PLL), 7;
Waldenstrom's macroglobulinemia (WM), 3] by fluorescence ISH with a genomic
p53 DNA probe. In a subset of patients, additional G-banding analysis and
single strand conformation polymorphism (SSCP) analysis was performed.
Seventeen of the 100 patients [17%; B-CLL, 11 of 90 (12%); WM, 1 of 3;
B-PLL, 5 of 7] exhibited a monoallelic p53 gene deletion by ISH. G- banding
analysis demonstrated abnormalities of chromosome 17 in 13 of these 17
patients, all leading to loss of band 17p13. SSCP analysis showed aberrant
bands in 9 of 14 patients with a p53 gene deletion. None of 12 patients
with a p53 gene deletion compared with 20 of 36 patients (56%) without a
deletion responded to therapy with fludarabine or pentostatin (P <
.001). The difference in survival probabilities from the time of diagnosis
and from the start of treatment with purine analogs between the two groups
was highly significant (P < .001). In multivariate analysis, p53 gene
deletion was the strongest prognostic factor for survival. In conclusion,
p53 gene deletion predicts for non- response to therapy with purine analogs
and for poor survival in chronic B-cell leukemias.
Volume 85,
Issue 6,
pp. 1580-1589,
03/15/1995
Copyright © 1995 by The American Society of Hematology

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A. Krober, T. Seiler, A. Benner, L. Bullinger, E. Bruckle, P. Lichter, H. Dohner, and S. Stilgenbauer
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A. R. Pettitt, P. D. Sherrington, G. Stewart, J. C. Cawley, A. M. R. Taylor, and T. Stankovic
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H. Dohner, S. Stilgenbauer, A. Benner, E. Leupolt, A. Krober, L. Bullinger, K. Dohner, M. Bentz, and P. Lichter
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A. R. Pettitt, P. D. Sherrington, and J. C. Cawley
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B. Bellosillo, N. Villamor, D. Colomer, G. Pons, E. Montserrat, and J. Gil
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N. Kalil and B. D. Cheson
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J. C. Byrd, C. Shinn, R. Ravi, C. R. Willis, J. K. Waselenko, I. W. Flinn, N. A. Dawson, and M. R. Grever
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J. C. Byrd, C. Shinn, J. K. Waselenko, E. J. Fuchs, T. A. Lehman, P. L. Nguyen, I. W. Flinn, L. F. Diehl, E. Sausville, and M. R. Grever
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