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Invest. clín ; 51(4): 479-488, dic. 2010. ilus
Article in Spanish | LILACS | ID: lil-630906

ABSTRACT

The cell response of human HepG2 cells exposed to hypothermia with rewarming was analyzed. Ultrastructural findings in hypothermic stressed cells showed swollen mitochondria, dispersed chromatin, vacuoles and ring-shape nucleolar reorganization. These changes were coupled with significative differences in the induction of Hsp60, inducible Hsp70 and monomeric Hsf1 in all treated samples, but not in Hsc 70 expression. Cellular response to hypothermia could be associated with the synergistic induction of Hsp expression.


En este trabajo se analizó la respuesta celular de células HepG2 expuestas a hipotermia con posterior recuperación. Los hallazgos ultraestructurales en células sometidas a estrés hipotérmico incluyeron mitocondrias edematizadas, núcleos picnóticos, vacuolas y reorganización nucleolar en forma de anillo. Tales cambios están relacionados con diferencias significativas en la inducción de la expresión de Hsp60, Hsp70 inducible y Hsf 1 monomérico en todas las muestras tratadas, pero no de Hsc70. La respuesta celular a la hipotermia puede ser relacionada con la inducción sinergística de las Hsp.


Subject(s)
Humans , Cold Temperature , Carcinoma, Hepatocellular/pathology , /biosynthesis , DNA-Binding Proteins/biosynthesis , Gene Expression Regulation, Neoplastic , /biosynthesis , Liver Neoplasms/pathology , Neoplasm Proteins/biosynthesis , Transcription Factors/biosynthesis , Cell Line, Tumor/metabolism , Cell Line, Tumor/ultrastructure , /genetics , Cold Temperature/adverse effects , DNA-Binding Proteins/genetics , /genetics , Mitochondria/ultrastructure , Neoplasm Proteins/genetics , Rewarming , Temperature , Transcription Factors/genetics
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