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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluating kinetic and physiological features of rCHO-K1 cells cultured on microcarriers for production of a recombinant metalloprotease/disintegrin

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Author(s):
Kamilla Swiech [1] ; Gracinda M.C da Silva [2] ; Teresa C Zangirolami [3] ; Mônica R.C Iemma [4] ; Heloísa S Selistre-de-Araújo [5] ; Cláudio A.T Suazo [6]
Total Authors: 6
Affiliation:
[1] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
[2] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
[3] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
[4] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
[5] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
[6] Federal University of Sao Carlos. Department of Chemical Engineering - Brasil
Total Affiliations: 6
Document type: Journal article
Source: ELECTRONIC JOURNAL OF BIOTECHNOLOGY; v. 10, n. 2, p. 200-210, 2007-04-15.
Abstract

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 μmax (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 (AU)