Comparative cytotoxicity of alkyl gallates on mouse tumor cell lines and isolated rat hepatocytes

Frey, C; Pavani, M.; Cordano, G; Munoz S.; Rivera, E; Medina, J; Morello A.; Maya, JD; Ferreira J.

Abstract

Alkyl esters of gallic acid inhibited the respiration rate of mouse sarcoma 786A and mouse mammary adenocarcinoma TA3 cell lines and its multiresistant variant TA3-MTX-R more effectively than gallic acid, both in the absence and in the presence of the uncoupler CCCP. The order of inhibition of the respiration rate by gallates in intact cells was n-octyl- ≈ iso-amyl- ≈ n-amyl- ≈ iso-butyl- > n-butyl- > iso-propyl- > n-propyl-gallate ≫ gallic acid. Sarcoma 786A was significantly more susceptible to all seven esters than the TA3 cell line. Respiration rates of the TA3-MTX-R cell line showed almost the same sensitivity to these esters as the TA3 cell line. However, hepatocytes were significantly less sensitive than all tumor cells tested. These alkyl gallates blocked mitochondrial electron flow, mainly at the NADH-CoQ segment, preventing ATP synthesis, which would lead to cellular death. These esters also inhibited, in the same order of potencies as respiration, the growth of 786A, TA3 and TA3-MTX-R cells in culture. In mice carrying TA3 or TA3-MTX-R tumor cells, an important decrease of the tumor growth rate and an increase of survival were observed when mice were treated with iso-butyl gallate alone or in combination with doxorubicin. These results indicate that alkyl gallates are selectively cytotoxic to tumor cells, which may be due to the mitochondrial dysfunctions of these cells. © 2006 Elsevier Inc. All rights reserved.

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Título según WOS: Comparative cytotoxicity of alkyl gallates on mouse tumor cell lines and isolated rat hepatocytes
Título según SCOPUS: Comparative cytotoxicity of alkyl gallates on mouse tumor cell lines and isolated rat hepatocytes
Título de la Revista: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
Volumen: 146
Número: 4
Editorial: Elsevier Science Inc.
Fecha de publicación: 2007
Página de inicio: 520
Página final: 527
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S1095643306001760
DOI:

10.1016/j.cbpa.2006.03.007

Notas: ISI, SCOPUS