Approach toward an efficient inoculum preparation stage for suspension BHK-21 cell culture

Author(s):Show less -

Fernandez Nunez, Eutimio Gustavo ^{[1, 2]} ; Leme, Jaci ^[3] ; Parizotto, Leticia de Almeida ^[2] ; de Rezende, Alexandre Goncalves ^[4] ; Vale da Costa, Bruno Labate ^[5] ; Lopes Boldorini, Vera Lucia ^[4] ; Calil Jorge, Soraia Attie ^[4] ; Astray, Renato Mancini ^[4] ; Pereira, Carlos Augusto ^{[4, 2]} ; Caricati, Celso Pereira ^[3] ; Tonso, Aldo ^[2]

Affiliation

^[1] Univ Estadual Julio de Mesquita Filho, Dept Ciencias Biol, BR-19806900 Assis, SP - Brazil

^[2] Univ Sao Paulo, Escola Politecn, Dept Engn Quim, Lab Celulas Anim, BR-05508900 Sao Paulo, SP - Brazil

^[3] Inst Butantan, Lab Especial Pesquisa & Desenvolvimento Imunol Ve, BR-05503900 Sao Paulo, SP - Brazil

^[4] Inst Butantan, Lab Imunol Viral, BR-05503900 Sao Paulo, SP - Brazil

^[5] Inst Pesquisas Tecnol Estado Sao Paulo SA, Lab Biotecnol Ind Nucleo Bionanomanufatura, BR-05508901 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Cytotechnology; v. 68, n. 1, p. 95-104, JAN 2016.
• Web of Science Citations: 2

Abstract

Mammalian cells are the most frequently used hosts for biopharmaceutical proteins manufacturing. Inoculum quality is a key element for establishing an efficient bioconversion process. The main objective in inoculation expansion process is to generate large volume of viable cells in the shortest time. The aim of this paper was to optimize the inoculum preparation stage of baby hamster kidney (BHK)-21 cells for suspension cultures in benchtop bioreactors, by means of a combination of static and agitated culture systems. Critical parameters for static (liquid column height: 5, 10, 15 mm) and agitated (working volume: 35, 50, 65 mL, inoculum volume percentage: 10, 30 % and agitation speed: 25, 60 rpm) cultures were study in T-flask and spinner flask, respectively. The optimal liquid column height was 5 mm for static culture. The maximum viable cell concentration in spinner flask cultures was reached with 50 mL working volume and the inoculum volume percentage was not significant in the range under study (10-30 %) at 25 rpm agitation. Agitation speed at 60 rpm did not change the main kinetic parameters with respect to those observed for 25 rpm. These results allowed for a schedule to produce more than 4 x 10(9) BHK-21 cells from 4 x 10(6) cells in 13 day with 1,051 mL culture medium. (AU)