Mitochondrial membrane potential is lost during apoptin treatment, and anti-apoptotic Bcl-2 family members block apoptin-induced death. Mitochondrial membrane.

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Date of download: 6/24/2016 Copyright © The American College of Cardiology. All rights reserved. From: Inhibition of ErbB2 causes mitochondrial dysfunction.

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Mitochondrial membrane potential is lost during apoptin treatment, and anti-apoptotic Bcl-2 family members block apoptin-induced death. Mitochondrial membrane potential is lost during apoptin treatment, and anti-apoptotic Bcl-2 family members block apoptin-induced death. (A) Mitochondrial membrane potential (ΔΨm) determination in Jurkat control cells, caspase-8(-/-) Jurkat cells and FADD-DN Jurkat cells either left untreated or treated with TAT-apoptin for the indicated time periods. ΔΨm was determined by using a cationic carbocyanine dye, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolylcarbocyanine iodide (JC-1), which shows a decrease in the red fluorescence upon loss of membrane potential. (B) Apoptosis (hypodiploid nuclei) detection, measured by flow cytometry, in Jurkat cells and clones stably transfected with either Bcl-2 or Bcl-XL treated with TAT-apoptin (1 μM) for the indicated time. (C) MCF7, MCF7-Bcl-2 and MCF7-caspase-3 breast cancer adenocarcinoma cells treated with TAT-Apoptin (1 μM) for the indicated period of time assessed for cell viability by the MTT assay. To exclude solvent- or TAT-peptide-related effects, some control cells (A-C) were treated with recombinant TAT-GFP (1 μM) instead of TAT-apoptin. Subbareddy Maddika et al. J Cell Sci 2005;118:4485-4493 © The Company of Biologists Limited 2005