alexa BAALC Gene Expression in Adult B-precursor Acute Lymphoblastic Leukemia: Impact on Prognosis
ISSN: 2155-9864

Journal of Blood Disorders & Transfusion
Open Access

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Research Article

BAALC Gene Expression in Adult B-precursor Acute Lymphoblastic Leukemia: Impact on Prognosis

Mona M. Taalab1, Iman M. Fawzy2*, Enas F. Goda3 and Eman M. Abdul Salam4

1Department of Clinical Hematology, Internal Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt

2Department of Laboratory Medicine, Mansoura Fever Hospital, Ministry of Health, Mansoura, Egypt

3Departments of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura, Egypt

4General Medicine, Faculty of Medicine, Azhar University, Cairo, Egypt

*Corresponding Author:
Iman M. Fawzy
Department of Laboratory Medicine
Mansoura Fever Hospital, Ministry of Health, Mansoura, Egypt
Tel: 1092600249
E-mail: [email protected]

Received date: April 23, 2014; Accepted date: May 26, 2014; Published date: June 06, 2014

Citation: Taalab MM, Fawzy IM, Goda EF, Salam EMA (2014) BAALC Gene Expression in Adult B-precursor Acute Lymphoblastic Leukemia: Impact on Prognosis. J Blood Disord Transfus 5:220. doi:10.4172/2155-9864.1000220

Copyright: © 2014 Taalab MM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Background: Adult B-precursor acute lymphoblastic leukemia (ALL) remains a major therapeutic challenge. Various molecular markers have extensively been investigated to improve its risk profile characterization, disease progression and resistance to treatment.

Aim: To analyze the brain and acute leukemia, cytoplasmic (BAALC) gene expression and to assess its prognostic impact in B-precursor ALL.

Subjects and Methods: BAALC mRNA expression was analyzed using real time PCR in 200 primary adult B-precursor ALL patients. Patients were grouped into 2 groups according to median BAALC expression. Results: High BAALC expression was associated with older age (P=0.037), higher white blood cell count (P =0.019), LDH concentration (p=0.007), higher incidence of positive CD34 (P =0.011) and positive BCR-ABL (P=0.011). High BAALC expression was associated with primary therapy resistance in the overall cohort (P = 0.001), in BCR-ABL− and BCR-ABL+ subgroups (P = 0.039, 0.003 respectively). Multivariate analysis showed that BAALC expression was an independent risk factor for chemotherapy resistance in the overall cohort ( =0.003, OR=3.133, 95% CI=1.482-6.623) and in both BCR-ABL- (p=0.049, OR=2.359, 95%CI=1.004-5.538), and BCRABL+ subgroups (p=0.014, OR=2.672, 95%CI=1.824-3.326). Higher BAALC expression was associated with a shorter overall survival (OS) (p= 0.010) and disease free survival (DFS) (p<0.001) in the overall cohort, and DFS in BCR-ABL- subgroup (p<0.001). Multivariate analysis showed that higher BAALC expression independently predicted OS and DFS in the overall cohort (P = 0.039, 0.002 respectively) and DFS in BCR-ABL- subgroup (p=0.001).

Conclusion: High BAALC expression is associated with refractory disease in adult B-precursor ALL, and predicts shorter OS and DFS. Determination of BAALC expression may contribute to risk stratification of adult B-precursor ALL, and may improve the currently disappointing cure rate.

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