Data/hora: 04/06/2024 11:07:37

Provedor de dados: 	69	
País: 	Chile	
Título: 	Evaluating kinetic and physiological features of rCHO-K1 cells cultured on microcarriers for production of a recombinant metalloprotease/disintegrin	
Autores: 	Swiech,Kamilla; da Silva,Gracinda M.C; Zangirolami,Teresa C; Iemma,Mônica R.C; Selistre-de-Araújo,Heloísa S; Suazo,Cláudio A.T.	
Data: 	2007-04-01	
Ano: 	2007	
Palavras-chave: 	Adhesion; Animal cell; CHO-K1; Growth; Microcarrier; Recombinant disintegrin.	
Resumo: 	We present kinetic and physiological data regarding the culturing of rCHO-K1 cells on various microcarriers, to evaluate the potential of this culture strategy for mass production of these cells and expression of a recombinant disintegrin. Cultures were performed in 500 mL spinner flasks in DMEM culture medium with 10% v/v fetal calf serum, gently shaken at 37ºC, pH 7.4, in a 10% v/v CO2 atmosphere. The following values were obtained, respectively, for the adhesion time-constant Ka (h) and specific growth rate &amp;#956;max (d-1) on each microcarrier: Cytodex 1 (0.91, 0.45), Cultispher S (0.28, 0.34), Immobasil FS (0.85, 0.52) and Pronectin F (5.12, 0.67). Metabolic characteristics showed some variation among the cultures with the four microcarriers, the most significant being the higher production of ammonia with microcarriers coated with adhesive molecules (Cultispher S and Pronectin F) relative to the uncoated carriers (Cytodex 1 and Immobasil FS). Experiments where the DMEM medium was gradually replaced by the serum-free medium (CHO-SFM-II) revealed important advantages over media containing serum, not only for assay purposes, but also for purification of the disintegrin. Altogether these results demonstrate that cultures on microcarriers, especially on Pronectin F, show good potential for larger scale cultures of rCHO-K1 cell	
Tipo: 	Journal article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000200004	
Editor: 	Pontificia Universidad Católica de Valparaíso	
Formato: 	text/html	
Fonte: 	Electronic Journal of Biotechnology  v.10 n.2 2007