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Ghotaslou A, Samii A, Boustani H, Kiani Ghalesardi O, Shahidi M. AMG-232, a New Inhibitor of MDM-2,Enhance Doxorubicin Efficiency in Pre-B Acute Lymphoblastic Leukemia Cells. rbmb.net. 2022; 11 (1) :111-124
URL: http://rbmb.net/article-1-851-en.html
Department of Hematology and Blood Banking, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran & Cellular and Molecular Research Center (CMRC), Iran University of Medical Sciences, Tehran, Iran.
Abstract:   (1573 Views)
Background: Doxorubicin (DOX)-induced cardiotoxicity appears to be a growing concern for extensive use in acute lymphoblastic leukemia (ALL). The new combination treatment strategies, therefore might be an effective way of decreasing its side effects as well as improving efficacy. AMG232 (KRT-232) is a potential MDM-2 inhibitor, increasing available p53 through disturbing p53-MDM-2 interaction. In this study, we examined the effects of AMG232 on DOX-induced apoptosis of NALM-6 cells.

Methods: The anti-leukemic effects of Doxorubicin on NALM-6 cells, either alone or in combination with AMG232, were confirmed by MTT assay, Annexin/PI apoptosis assay, and cell cycle analysis. Expression of apoptosis and autophagy-related genes were further evaluated by Real time-PCR method. To investigate the effect of AMG232 on NALM-6 cells, the activation of p53, p21, MDM-2, cleaved Caspase-3 proteins
was evaluated using western blot analysis.

Results: The results showed that AMG232 inhibition of MDM-2 enhances Doxorubicin-induced apoptosis in NALM-6 cells through caspase-3 activation in a time and dose-dependent manner. Furthermore, cotreatment of AMG232 with Doxorubicin hampered the transition of NALM-6 cells from G1 phase through
increasing p21 protein. In addition, this combination treatment led to enhanced expression of apoptosis and autophagy-related genes in ALL cell lines.

Conclusions: The results declared that AMG232 as an MDM-2 inhibitor could be an effective approach to enhance antitumor effects of Doxorubicin on NALM-6 cells as well as an effective future treatment for ALL patients.
Full-Text [PDF 623 kb]   (450 Downloads)    
Type of Article: Original Article | Subject: Molecular Biology
Received: 2022/01/4 | Accepted: 2022/01/9 | Published: 2022/05/26

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