Data/hora: 11/06/2024 01:29:35

Provedor de dados: | 42
País: | Brazil
Título: | Active caspase-3 expression levels as bioindicator of individual radiosensitivity
Autores: | SANTOS,NEYLIANE F.G. DOS; SILVA,RAFAEL F.; PINTO,MARCELA M.P.L.; SILVA,EDVANE B. DA; TASAT,DEBORAH R.; AMARAL,ADEMIR.
Data: | 2017-05-01
Ano: | 2017
Palavras-chave: | Active caspase-3; Apoptosis; Flow cytometry; Ionizing radiation; Lymphocytes.
Resumo: | ABSTRACT Several molecules and events involved in cell response to radiation-induced damage have been investigated towards a personalized radiotherapy. Considering the importance of active caspase-3 in the proteolytic cascade that ensures radiation-induced apoptosis execution, this research was designed to evaluate the expression levels of this protein as a bioindicator of individual radiosensitivity. Peripheral blood samples of 10 healthy individuals were gamma-irradiated (cobalt-60 source) with 1, 2 and 4 Gy (control: non-irradiated samples), and active caspase-3 expression levels were measured in lymphocytes, by flow cytometry, ex vivo and after different times of in vitro incubation (24, 48 and 72 hours). Short-term incubation of 24 h was the most adequate condition to evidence correlations between dose radiation and active caspase-3 expression. For each radiation dose, it was observed a significant inter-individual variation in active caspase-3 expression intensity, suggesting that this parameter may be suitable for evidence individual radiosensitivity. The methodology presented and discussed in this work may help to predict healthy tissues response to radiation exposure toward the better patient outcome.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200649
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201720160697
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.89 n.1 suppl.0 2017
Fonte: | info:eu-repo/semantics/openAccess