Fed-Batch Production of Saccharomyces cerevisiae L-Asparaginase II by Recombinant Pichia pastoris MUTs Strain

Autor(es):Mostrar menos -

Rodrigues, David ^[1] ; Pillaca-Pullo, Omar ^[2] ; Torres-Obreque, Karin ^[2] ; Flores-Santos, Juan ^[2] ; Sanchez-Moguel, Ignacio ^[2] ; Pimenta, V, Marcela ; Basi, Tajindar ^[3] ; Converti, Attilio ^[4] ; Lopes, Andre M. ^[5] ; Monteiro, Gisele ^[6] ; Fonseca, Luis P. ^[1] ; Pessoa Jr, Adalberto

Afiliação do(s) autor(es)

^[1] Univ Lisbon, Inst Super Tecn, Inst Bioengn & Biosci, Bioengn Dept, Lisbon - Portugal

^[2] Univ Sao Paulo, Sch Pharmaceut Sci, Dept Pharmaceut Biochem Technol, Sao Paulo - Brazil

^[3] Kings Coll London, Dept Pharm, London - England

^[4] Dept Civil Chem & Environm Engn, Genoa - Italy

^[5] Univ Estadual Campinas, Fac Pharmaceut Sci, Campinas, SP - Brazil

^[6] Pimenta, Marcela, V, Univ Sao Paulo, Sch Pharmaceut Sci, Dept Pharmaceut Biochem Technol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY; v. 7, FEB 8 2019.
• Citações Web of Science: 0

Resumo

L-Asparaginase (ASNase) is used in the treatment of acute lymphoblastic leukemia, being produced and commercialized only from bacterial sources. Alternative Saccharomyces cerevisiae ASNase II coded by the ASP3 gene was biosynthesized by recombinant Pichia pastoris MUTs under the control of the AOX1 promoter, using different cultivation strategies. In particular, we applied multistage fed-batch cultivation divided in four distinct phases to produce ASNase II and determine the fermentation parameters, namely specific growth rate, biomass yield, and enzyme activity. Cultivation of recombinant P pastoris under favorable conditions in a modified defined medium ensured a dry biomass concentration of 31 g(dcw.)L(-1) during glycerol batch phase, corresponding to a biomass yield of 0.77 g(dcw.)g(glycerol)(-1) and a specific growth rate of 0.21 h(-1). After 12 h of glycerol feeding under limiting conditions, cell concentration achieved 65 g(dcw.)L (-1) while ethanol concentration was very low. During the phase of methanol induction, biomass concentration achieved 91 g(dcw.)L(-1), periplasmic specific enzyme activity 37.1 U.g(dcw')(-1), volumetric enzyme activity 3,315 U.L-1, overall enzyme volumetric productivity 31 U.L-1.h(-1), while the specific growth rate fell to 0.039 h(-1). Our results showed that the best strategy employed for the ASNase II production was using glycerol fed-batch phase with pseudo exponential feeding plus induction with continuous methanol feeding. (AU)

• Processo FAPESP: 13/08617-7 - Produção de L-asparaginase extracelular: da bioprospecção à engenharia de um biofármaco antileucêmico
• Beneficiário: Adalberto Pessoa Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/10789-1 - Terapia combinatória utilizando polimerossomos decorados com transferrina e incorporados em hidrogéis de quitosana como smart drug delivery systems para células tumorais de melanoma
• Beneficiário: André Moreni Lopes
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores