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Clinical Significance of Beclin-1 Dependent Autophagy Induced by Imatinib in Chronic Myeloid Leukemia Patients | OMICS International| Abstract

Journal of Mucosal Immunology Research
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  • Research Article   
  • J Mucosal Immunol Res 2017: 103,

Clinical Significance of Beclin-1 Dependent Autophagy Induced by Imatinib in Chronic Myeloid Leukemia Patients

Esmat A. El-Sharkawy1, Khalid M. Salah1, Amel Mahmoud Kamal Eldin,1*, Ayman Gamil Ghobrial1, Walid M. Abdel-Hamid1, Eman Hassan2 and Rasha Y. Ali2
1Clinical Pathology Department, Faculty of Medicine, Minia University, Egypt
2Clinical Pathology Department, Faculty of Medicine, Assiut University, Egypt
*Corresponding Author : Amel Mahmoud Kamal Eldin, MD, PhD, Department of Clinical Pathology, Faculty of Medicine, Minia University, Minia, Egypt, Tel: +201019748497, Email: [email protected]

Received Date: Feb 15, 2017 / Accepted Date: Jun 26, 2017 / Published Date: Jun 30, 2017

Abstract

Background and objectives: The introduction of imatinib as one of the tyrosine kinase inhibitors (TKI) has revolutionized the treatment of chronic myelogenous leukemia (CML), representing the first target specific drug. Autophagy is a constitutive homeostatic mechanism for intracellular recycling and metabolic regulation. The role of autophagy in cancer is very complex, it is tumor suppression mechanism yet it enables tumor cell survival in stress. The aim of the present study was to assess autophagy induced by imatinib therapy through beclin-1 gene in CML patients, and to evaluate beclin-1 gene expression in relation to patients’ clinical and hematological response.

Subjects and methods: The present study was carried out on 50 subjects, 35 newly diagnosed CML patients who were classified into 2 groups: (Group I) including 17 CML patients and (Group II) including 18 CML patients in accelerated phase, and 15 apparently healthy subjects served as controls (Group III). All patients were treated with imatinib and followed up after six weeks of treatment. Each patient was subjected to complete history taking, clinical examination along with laboratory investigations in the form of liver & renal function tests, random blood glucose, ESR, CBC & examination of Leishman-stained peripheral blood and Bone marrow aspiration and examination of Leishman-stained smears. The diagnosis was confirmed by detection of BCR-ABL gene expression by quantitative RT-PCR. Beclin-1 gene expression in peripheral blood samples was assessed as well via quantitative RT-PCR for all subjects along with its reassessment in follow-up samples for all patients.

Results: All patients in the study have achieved complete clinical and hematological response after six weeks of the beginning of imatinib therapy along with a highly significant increase in beclin-1 gene expression levels after treatment, (P<0.001) than before treatment in both patients groups I & II. There was no significant difference between group I & group II, regarding beclin-1 gene expression results after treatment (p=0.631). There was a high statistically significant negative correlation between beclin-1 gene expression before treatment and BCR-ABL gene expression results (r=-0.844 & -0.822) in group I and II respectively.

Conclusions: We concluded that beclin-1 dependent autophagy is increased after the beginning of imatinib therapy indicating induction of autophagy in CML patients, along with complete clinical and hematological response.

Keywords: Chronic myeloid leukemia; Imatinib; Autophagy

Citation: El-Sharkawy EA, Salah KM, Kamal Eldin AM, Ghobrial AG, Abdel-Hamid WM, et al. (2017) Clinical Significance of Beclin-1 Dependent Autophagy Induced by Imatinib in Chronic Myeloid Leukemia Patients. J Mucosal Immunol Res 1:103.

Copyright: ©2017 El-sharkawy EA, 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.

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