Utilize este identificador para referenciar este registo: https://hdl.handle.net/10316/27396
Título: Human colon adenocarcinoma HT-29 cell: electrochemistry and nicotine stimulation
Autor: Oliveira, S. C. B. 
Santarino, I. B. 
Enache, T. A. 
Nunes, C. 
Laranjinha, J. 
Barbosa, R. M. 
Brett, A. M. Oliveira 
Palavras-chave: Colon cancer HT-29 cells; Epinephrine; Nicotine; Carbon electrodes; ITO electrodes
Data: Dez-2013
Editora: Elsevier
Citação: OLIVEIRA, S. C. B. [et. al] - Human colon adenocarcinoma HT-29 cell: electrochemistry and nicotine stimulation. "Bioelectrochemistry". ISSN 1567-5394. Vol. 94 (2013) p. 30-38
Título da revista, periódico, livro ou evento: Bioelectrochemistry
Volume: 94
Resumo: Recently, it was demonstrated that colorectal cancer HT-29 cells can secrete epinephrine (adrenaline) in an autocrine manner to auto-stimulate cellular growth by adrenoreceptors activation, and that this secretion is enhanced by nicotine, showing an indirect relation between colorectal cancer and tobacco. The electrochemical behaviour of human colon adenocarcinoma HT-29 cells from a colorectal adenocarcinoma cell line, the hormone and neurotransmitter epinephrine, and nicotine, were investigated by cyclic voltammetry, using indium tin oxide (ITO), glassy carbon (GC) and screen printed carbon (SPC) electrodes. The oxidation of the HT-29 cells, previously grown onto ITO or SPC surfaces, followed an irreversible oxidation process that involved the formation of a main oxidation product that undergoes irreversible reduction, as in the epinephrine oxidation mechanism. The effect of nicotine stimulation of the HT-29 cells was also investigated. Nicotine, at different concentration levels 1, 2 and 15 mM, was introduced in the culture medium and an increase with incubation time, 0 to 3 h and 30 min, of the HT-29 cells oxidation and reduction peaks was observed. The interaction of nicotine with the HT-29 cells stimulated the epinephrine secretion causing an increase in epinephrine release concentration, and enabling the conclusion that epinephrine and nicotine play an important role in the colorectal tumour growth.
URI: https://hdl.handle.net/10316/27396
ISSN: 1567-5394
DOI: 10.1016/j.bioelechem.2013.05.004
Direitos: openAccess
Aparece nas coleções:I&D CNC - Artigos em Revistas Internacionais
FFUC- Artigos em Revistas Internacionais
FCTUC Química - Artigos em Revistas Internacionais

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