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Karyotypic complexity rather than chromosome 8 abnormalities aggravates the outcome of chronic lymphocytic leukemia patients with TP53 aberrations
Hosp del Mar, Serv Patol, Lab Citol Hematol, Lab Citogenet Mol, Barcelona, Spain.;Hosp del Mar, IMIM, Canc Res Programme, Grp Recerca Translac Neoplasies Hematol, Barcelona, Spain.;Univ Pompeu Fabra, Dept Expt & Hlth Sci, Barcelona, Spain..
Hosp del Mar, Serv Patol, Lab Citol Hematol, Lab Citogenet Mol, Barcelona, Spain.;Hosp del Mar, IMIM, Canc Res Programme, Grp Recerca Translac Neoplasies Hematol, Barcelona, Spain..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology. Uppsala University, Science for Life Laboratory, SciLifeLab.
G Papanicolaou Hosp, Dept Hematol, Thessaloniki, Greece.;G Papanicolaou Hosp, HCT Unit, Thessaloniki, Greece..
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2016 (English)In: OncoTarget, ISSN 1949-2553, E-ISSN 1949-2553, Vol. 7, no 49, 80916-80924 p.Article in journal (Refereed) Published
Abstract [en]

Patients with chronic lymphocytic leukemia (CLL) harboring TP53 aberrations (TP53abs; chromosome 17p deletion and/or TP53 mutation) exhibit an unfavorable clinical outcome. Chromosome 8 abnormalities, namely losses of 8p (8p-) and gains of 8q (8q+) have been suggested to aggravate the outcome of patients with TP53abs. However, the reported series were small, thus hindering definitive conclusions. To gain insight into this issue, we assessed a series of 101 CLL patients harboring TP53 disruption. The frequency of 8p- and 8q+ was 14.7% and 17.8% respectively. Both were associated with a significantly (P < 0.05) higher incidence of a complex karyotype (CK, >= 3 abnormalities) detected by chromosome banding analysis (CBA) compared to cases with normal 8p (N-8p) and 8q (N-8q), respectively. In univariate analysis for 10- year overall survival (OS), 8p- (P = 0.002), 8q+ (P = 0.012) and CK (P = 0.009) were associated with shorter OS. However, in multivariate analysis only CK (HR = 2.47, P = 0.027) maintained independent significance, being associated with a dismal outcome regardless of chromosome 8 abnormalities. In conclusion, our results highlight the association of chromosome 8 abnormalities with CK amongst CLL patients with TP53abs, while also revealing that CK can further aggravate the prognosis of this aggressive subgroup.

Place, publisher, year, edition, pages
2016. Vol. 7, no 49, 80916-80924 p.
National Category
Cancer and Oncology
URN: urn:nbn:se:uu:diva-313534DOI: 10.18632/oncotarget.13106ISI: 000389877500066OAI: diva2:1070585
Swedish Cancer SocietySwedish Research Council
Available from: 2017-02-01 Created: 2017-01-20 Last updated: 2017-11-29Bibliographically approved

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Baliakas, PanagiotisXochelli, Aliki
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Experimental and Clinical OncologyScience for Life Laboratory, SciLifeLabDepartment of Immunology, Genetics and Pathology
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