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L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids
L-asparaginase (ASNase) is a therapeutical enzyme used for treatment of acute lymphoblastic leukemia. ASNase products available in the market are produced by bacteria and usually present allergic response and important toxicity effects to the patients. Production of ASNase by yeasts could be an alte...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7773903/ https://www.ncbi.nlm.nih.gov/pubmed/33392162 http://dx.doi.org/10.3389/fbioe.2020.576511 |
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author | Moguel, Ignacio S. Yamakawa, Celina K. Pessoa, Adalberto Mussatto, Solange I. |
author_facet | Moguel, Ignacio S. Yamakawa, Celina K. Pessoa, Adalberto Mussatto, Solange I. |
author_sort | Moguel, Ignacio S. |
collection | PubMed |
description | L-asparaginase (ASNase) is a therapeutical enzyme used for treatment of acute lymphoblastic leukemia. ASNase products available in the market are produced by bacteria and usually present allergic response and important toxicity effects to the patients. Production of ASNase by yeasts could be an alternative to overcome these problems since yeasts have better compatibility with the human system. Recently, it was found that Leucosporidium scottii, a psychrotolerant yeast, produces ASNase. In order to advance the production of ASNase by this yeast, the present study aimed to select suitable process conditions able to maximize the production of this enzyme in a bench-scale bioreactor. Additionally, the accumulation of lipids during the enzyme production process was also determined and quantified. Experiments were carried out with the aim of selecting the most appropriate conditions of initial cell concentration (1.0, 3.5, and 5.6 g L(–1)), carbon source (sucrose and glycerol, individually or in mixture) and oxygen transfer rate (k(L)a in the range of 1.42–123 h(–1)) to be used on the production of ASNase by this yeast. Results revealed that the enzyme production increased when using an initial cell concentration of 5.6 g L(–1), mixture of sucrose and glycerol as carbon source, and k(L)a of 91.72 h(–1). Under these conditions, the enzyme productivity was maximized, reaching 35.11 U L(–1) h(–1), which is already suitable for the development of scale-up studies. Additionally, accumulation of lipids was observed in all the cultivations, corresponding to 2–7 g L(–1) (32–40% of the cell dry mass), with oleic acid (C(18)(:)(1)) being the predominant compound (50.15%). Since the L-asparaginase biopharmaceuticals on the market are highly priced, the co-production of lipids as a secondary high-value product during the ASNase production, as observed in the present study, is an interesting finding that opens up perspectives to increase the economic feasibility of the enzyme production process. |
format | Online Article Text |
id | pubmed-7773903 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-77739032021-01-01 L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids Moguel, Ignacio S. Yamakawa, Celina K. Pessoa, Adalberto Mussatto, Solange I. Front Bioeng Biotechnol Bioengineering and Biotechnology L-asparaginase (ASNase) is a therapeutical enzyme used for treatment of acute lymphoblastic leukemia. ASNase products available in the market are produced by bacteria and usually present allergic response and important toxicity effects to the patients. Production of ASNase by yeasts could be an alternative to overcome these problems since yeasts have better compatibility with the human system. Recently, it was found that Leucosporidium scottii, a psychrotolerant yeast, produces ASNase. In order to advance the production of ASNase by this yeast, the present study aimed to select suitable process conditions able to maximize the production of this enzyme in a bench-scale bioreactor. Additionally, the accumulation of lipids during the enzyme production process was also determined and quantified. Experiments were carried out with the aim of selecting the most appropriate conditions of initial cell concentration (1.0, 3.5, and 5.6 g L(–1)), carbon source (sucrose and glycerol, individually or in mixture) and oxygen transfer rate (k(L)a in the range of 1.42–123 h(–1)) to be used on the production of ASNase by this yeast. Results revealed that the enzyme production increased when using an initial cell concentration of 5.6 g L(–1), mixture of sucrose and glycerol as carbon source, and k(L)a of 91.72 h(–1). Under these conditions, the enzyme productivity was maximized, reaching 35.11 U L(–1) h(–1), which is already suitable for the development of scale-up studies. Additionally, accumulation of lipids was observed in all the cultivations, corresponding to 2–7 g L(–1) (32–40% of the cell dry mass), with oleic acid (C(18)(:)(1)) being the predominant compound (50.15%). Since the L-asparaginase biopharmaceuticals on the market are highly priced, the co-production of lipids as a secondary high-value product during the ASNase production, as observed in the present study, is an interesting finding that opens up perspectives to increase the economic feasibility of the enzyme production process. Frontiers Media S.A. 2020-12-17 /pmc/articles/PMC7773903/ /pubmed/33392162 http://dx.doi.org/10.3389/fbioe.2020.576511 Text en Copyright © 2020 Moguel, Yamakawa, Pessoa and Mussatto. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Bioengineering and Biotechnology Moguel, Ignacio S. Yamakawa, Celina K. Pessoa, Adalberto Mussatto, Solange I. L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title | L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title_full | L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title_fullStr | L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title_full_unstemmed | L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title_short | L-asparaginase Production by Leucosporidium scottii in a Bench-Scale Bioreactor With Co-production of Lipids |
title_sort | l-asparaginase production by leucosporidium scottii in a bench-scale bioreactor with co-production of lipids |
topic | Bioengineering and Biotechnology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7773903/ https://www.ncbi.nlm.nih.gov/pubmed/33392162 http://dx.doi.org/10.3389/fbioe.2020.576511 |
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