Increased p53 protein expression as a potential predictor of early relapse after hematopoietic stem cell transplantation in children with acute myelogenous leukemia.

Abstract:

:Dysregulation of genes involved in the cell cycle such as TP53, P21, P16, and PTEN plays a key role in oncogenesis. We have earlier reported increased expression of the TP53 encoded protein p53, in bone marrow samples from pediatric patients with more aggressive, rare chronic myeloid malignancies. The aim of this study was to investigate protein expression of p53, p21, p16, and PTEN before and after HSCT in pediatric patients with AML and evaluate whether any potential alterations could predict relapse after HSCT. Paraffin-embedded bone marrow samples from 34 pediatric patients with AML were collected retrospectively from time of diagnosis as well as pre- and post-HSCT. IHC was performed on tissue microarrays with antibodies against p53, p21, p16, and PTEN. Study material was analyzed by independent t-tests and nonlinear regression. t-Tests showed a statistical significant difference in p53 (p = 0.010) with overexpression in the group of patients who relapsed compared to the relapse-free patients at >3-6 months post-HSCT. Analysis of p53 protein expression by IHC may be a potential predictor for relapse after HSCT in children with AML.

journal_name

Pediatr Transplant

authors

Mattsson K,Honkaniemi E,Barbany G,Gustafsson B

doi

10.1111/petr.12585

subject

Has Abstract

pub_date

2015-11-01 00:00:00

pages

767-75

issue

7

eissn

1397-3142

issn

1399-3046

journal_volume

19

pub_type

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