The anti-cancer agent guttiferone-A permeabilizes mitochondrial membrane: Ensuing energetic and oxidative stress implications

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Toxicology and Applied Pharmacology

DOI:https://doi.org/10.1016/j.taap.2011.04.011· OSTI ID:21587772

Nunez-Figueredo, Yanier ^[1]; Tudella, Valeria G ^[2]; Cuesta-Rubio, Osmany ^[3]; Rodrigues, Fernando P; Pestana, Cezar R ^[2]; Uyemura, Sergio A; Leopoldino, Andreia M ^[4]; Alberici, Luciane C; Curti, Carlos ^[2]

---

1. Centro para las Investigaciones y Desarrollo de Medicamentos, Ave 26, No. 1605 Boyeros y Puentes Grandes, CP 10600, Ciudad Habana (Cuba)
2. Departamento de Fisica e Quimica, Faculdade de Ciencias Farmaceuticas de Ribeirao Preto, Universidade de Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP (Brazil)
3. Departamento de Quimica, Instituto de Farmacia y Alimentos, Universidad de La Habana, ave. 23 21425 e/214 and 222, La Coronela, La Lisa, CP 13600, Ciudad Habana (Cuba)
4. Departamento de Analises Clinicas, Toxicologicas e Bromatologicas, Faculdade de Ciencias Farmaceuticas de Ribeirao Preto, Universidade de Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP (Brazil)

Guttiferone-A (GA) is a natural occurring polyisoprenylated benzophenone with cytotoxic action in vitro and anti-tumor action in rodent models. We addressed a potential involvement of mitochondria in GA toxicity (1-25 {mu}M) toward cancer cells by employing both hepatic carcinoma (HepG2) cells and succinate-energized mitochondria, isolated from rat liver. In HepG2 cells GA decreased viability, dissipated mitochondrial membrane potential, depleted ATP and increased reactive oxygen species (ROS) levels. In isolated rat-liver mitochondria GA promoted membrane fluidity increase, cyclosporine A/EGTA-insensitive membrane permeabilization, uncoupling (membrane potential dissipation/state 4 respiration rate increase), Ca{sup 2+} efflux, ATP depletion, NAD(P)H depletion/oxidation and ROS levels increase. All effects in cells, except mitochondrial membrane potential dissipation, as well as NADPH depletion/oxidation and permeabilization in isolated mitochondria, were partly prevented by the a NAD(P)H regenerating substrate isocitrate. The results suggest the following sequence of events: 1) GA interaction with mitochondrial membrane promoting its permeabilization; 2) mitochondrial membrane potential dissipation; 3) NAD(P)H oxidation/depletion due to inability of membrane potential-sensitive NADP{sup +} transhydrogenase of sustaining its reduced state; 4) ROS accumulation inside mitochondria and cells; 5) additional mitochondrial membrane permeabilization due to ROS; and 6) ATP depletion. These GA actions are potentially implicated in the well-documented anti-cancer property of GA/structure related compounds. - Graphical abstract: Guttiferone-A permeabilizes mitochondrial membrane and induces cancer cell death Display Omitted Highlights: > We addressed the involvement of mitochondria in guttiferone (GA) toxicity toward cancer cells. > GA promoted membrane permeabilization, membrane potential dissipation, NAD(P)H depletion, ROS accumulation and ATP depletion. > These actions could be implicated in the well-documented anti-cancer property of GA/structure related compounds.

• OSTI ID: 21587772
• Journal Information: Toxicology and Applied Pharmacology, Vol. 253, Issue 3; Other Information: DOI: 10.1016/j.taap.2011.04.011; PII: S0041-008X(11)00150-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0041-008X
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
APOPTOSIS
ATP
BENZOPHENONE
CARCINOMAS
CYCLOSPORINE
IN VITRO
INTERACTIONS
LIVER
MEMBRANES
MITOCHONDRIA
OXIDATION
RATS
TOXICITY
ANIMALS
BODY
CELL CONSTITUENTS
CHEMICAL REACTIONS
DIGESTIVE SYSTEM
DISEASES
DRUGS
GLANDS
IMMUNOSUPPRESSIVE DRUGS
KETONES
MAMMALS
NEOPLASMS
NUCLEOTIDES
ORGANIC COMPOUNDS
ORGANS
PEPTIDES
PROTEINS
RODENTS
VERTEBRATES