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Pasteurellosis Vaccine Commercialization: Physiochemical Factors for Optimum Production. Processes (Basel) 2022. [DOI: 10.3390/pr10071248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Pasteurella spp. are Gram-negative facultative bacteria that cause severe economic and animal losses. Pasteurella-based vaccines are the most promising solution for controlling Pasteurella spp. outbreaks. Remarkably, insufficient biomass cultivation (low cell viability and productivity) and lack of knowledge about the cultivation process have impacted the bulk production of animal vaccines. Bioprocess optimization in the shake flask and bioreactor is required to improve process efficiency while lowering production costs. However, its state of the art is limited in providing insights on its biomass upscaling, preventing a cost-effective vaccine with mass-produced bacteria from being developed. In general, in the optimum cultivation of Pasteurella spp., production factors such as pH (6.0–8.2), agitation speed (90–500 rpm), and temperature (35–40 °C) are used to improve production yield. Hence, this review discusses the production strategy of Pasteurella and Mannheimia species that can potentially be used in the vaccines for controlling pasteurellosis. The physicochemical factors related to operational parameter process conditions from a bioprocess engineering perspective that maximize yields with minimized production cost are also covered, with the expectation of facilitating the commercialization process.
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Dai Y, Wang YH, Li M, Zhu ML, Wen TY, Wu XQ. Medium optimization to analyze the protein composition of Bacillus pumilus HR10 antagonizing Sphaeropsis sapinea. AMB Express 2022; 12:61. [PMID: 35606553 PMCID: PMC9127024 DOI: 10.1186/s13568-022-01401-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/08/2022] [Indexed: 11/10/2022] Open
Abstract
A previous study found that a biocontrol bacterium, Bacillus pumilus HR10, inhibited the Sphaeropsis shoot blight disease of pine, and the fermentation broth of HR10 strain contained protein antifungal substances. The optimal formulation of the fermentation medium for the antagonistic substance of B. pumilus HR10 was finally obtained by single-factor test, Packett-Burman test, steepest ascent test and Box-Behnken Design (BBD) response surface test, and the best formulation of the fermentation medium for the antagonistic substance of B. pumilus HR10 was 12 g/L corn meal, 15 g/L beef extract and 13 g/L magnesium sulfate, with a predicted bacterial inhibition rate of 89%. The fermentation filtrate of B. pumilus HR10 cultured with the optimized medium formulation was verified to have an inhibition rate of (87.04 ± 3.2) % on the growth of Sphaeropsis sapinea by three replicate tests. The antagonistic crude protein of B. pumilus HR10 were further isolated and identified using HiTrap Capto Q strong Ion-Exchange Chromatography and LC-MS-MS, and it was speculated that glycoside hydrolase (Ghy), beta-glucanase (Beta), arabinogalactan endonuclease β-1,4-galactanase (Arab), and immunosuppressant A (ImA) are proteins with antagonistic activity against S. sapinea in the B. pumilus HR10.
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Singh S, Sithole B, Lekha P, Permaul K, Govinden R. Optimization of cultivation medium and cyclic fed-batch fermentation strategy for enhanced polyhydroxyalkanoate production by Bacillus thuringiensis using a glucose-rich hydrolyzate. BIORESOUR BIOPROCESS 2021; 8:11. [PMID: 38650248 PMCID: PMC10992944 DOI: 10.1186/s40643-021-00361-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 01/05/2021] [Indexed: 01/22/2023] Open
Abstract
The accumulation of petrochemical plastic waste is detrimental to the environment. Polyhydroxyalkanoates (PHAs) are bacterial-derived polymers utilized for the production of bioplastics. PHA-plastics exhibit mechanical and thermal properties similar to conventional plastics. However, high production cost and obtaining high PHA yield and productivity impedes the widespread use of bioplastics. This study demonstrates the concept of cyclic fed-batch fermentation (CFBF) for enhanced PHA productivity by Bacillus thuringiensis using a glucose-rich hydrolyzate as the sole carbon source. The statistically optimized fermentation conditions used to obtain high cell density biomass (OD600 of 2.4175) were: 8.77 g L-1 yeast extract; 66.63% hydrolyzate (v/v); a fermentation pH of 7.18; and an incubation time of 27.22 h. The CFBF comprised three cycles of 29 h, 52 h, and 65 h, respectively. After the third cyclic event, cell biomass of 20.99 g L-1, PHA concentration of 14.28 g L-1, PHA yield of 68.03%, and PHA productivity of 0.219 g L-1 h-1 was achieved. This cyclic strategy yielded an almost threefold increase in biomass concentration and a fourfold increase in PHA concentration compared with batch fermentation. FTIR spectra of the extracted PHAs display prominent peaks at the wavelengths unique to PHAs. A copolymer was elucidated after the first cyclic event, whereas, after cycles CFBF 2-4, a terpolymer was noted. The PHAs obtained after CFBF cycle 3 have a slightly higher thermal stability compared with commercial PHB. The cyclic events decreased the melting temperature and degree of crystallinity of the PHAs. The approach used in this study demonstrates the possibility of coupling fermentation strategies with hydrolyzate derived from lignocellulosic waste as an alternative feedstock to obtain high cell density biomass and enhanced PHA productivity.
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Affiliation(s)
- Sarisha Singh
- Discipline of Microbiology, University of KwaZulu-Natal (Westville Campus), Durban, South Africa.
| | - Bruce Sithole
- Biorefinery Industry Development Facility, Chemicals Cluster, Council for Scientific and Industrial Research, Durban, South Africa
- Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, South Africa
| | - Prabashni Lekha
- Biorefinery Industry Development Facility, Chemicals Cluster, Council for Scientific and Industrial Research, Durban, South Africa
| | - Kugenthiren Permaul
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Roshini Govinden
- Discipline of Microbiology, University of KwaZulu-Natal (Westville Campus), Durban, South Africa
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Keskes S, Jallouli W, Atitallah IB, Driss F, Sahli E, Chamkha M, Tounsi S. Development of a cost-effective medium for Photorhabdus temperata bioinsecticide production from wastewater and exploration of performance kinetic. Sci Rep 2021; 11:779. [PMID: 33436984 PMCID: PMC7804953 DOI: 10.1038/s41598-020-80773-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 12/22/2020] [Indexed: 01/29/2023] Open
Abstract
This study investigates the optimization of the culture conditions for enhancing Photorhabdus temperata biopesticide production using wastewater (WS4) as a raw material. Box-Behnken design (BBD) was used to evaluate the effects of carbon to nitrogen ratio (C/N), sodium chloride concentration and inoculum size on P. temperata biomass production and insecticidal activity. For an enhanced biopesticide production, the optimum operating conditions were as follows: inoculum size = 4%; C/N ratio = 12.5 and [NaCl] = 4 g/L for two responses. 1.95 and 2.75 fold improvements in oral toxicity and biomass production were respectively obtained in the cost-effective medium developed in this study (WS4 I) using the three variables at their optimal values. Under the optimized conditions, WS4 I-grown cells exhibited higher membrane integrity according to flow cytometry analysis since dead cells presented only 9.2% compared to 29.2% in WS4. From batch fermentations carried out in WS4 I and WS4, P. temperata kinetic parameters in terms of biomass production and substrate consumption rates were modeled. The obtained results showed that the maximum specific growth rate in WS4 I was of 0.43 h-1 while that obtained in WS4 was of 0.14 h-1. In addition, the efficiency of P. temperata to metabolize organic carbon was enhanced by optimizing the culture conditions. It reached 72.66% instead of 46.18% in the control fermentation after 10 h of incubation. Under the optimized conditions, P. temperata cells showed the highest specific consumption rate resulting in a toxin synthesis improvement.
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Affiliation(s)
- Sahar Keskes
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia
| | - Wafa Jallouli
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia.
| | - Imen Ben Atitallah
- Laboratory of Enzyme Engineering and Microbiology, National School of Engineering of Sfax (ENIS), Sfax University, BP 1173, 3038, Sfax, Tunisia
| | - Fatma Driss
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia
| | - Emna Sahli
- Analysis Laboratory, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia
| | - Mohamed Chamkha
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia
| | - Slim Tounsi
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, P.O. Box '1177', 3018, Sfax, Tunisia
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Cheng L, Wang J, Zhao X, Yin H, Fang H, Lin C, Zhang S, Shen Z, Zhao C. An antiphage Escherichia coli mutant for higher production of L-threonine obtained by atmospheric and room temperature plasma mutagenesis. Biotechnol Prog 2020; 36:e3058. [PMID: 32735374 DOI: 10.1002/btpr.3058] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/27/2020] [Accepted: 07/27/2020] [Indexed: 12/21/2022]
Abstract
Phage infection is common during the production of L-threonine by E. coli, and low L-threonine production and glucose conversion percentage are bottlenecks for the efficient commercial production of L-threonine. In this study, 20 antiphage mutants producing high concentration of L-threonine were obtained by atmospheric and room temperature plasma (ARTP) mutagenesis, and an antiphage E. coli variant was characterized that exhibited the highest production of L-threonine Escherichia coli ([E. coli] TRFC-AP). The elimination of fhuA expression in E. coli TRFC-AP was responsible for phage resistance. The biomass and cell growth of E. coli TRFC-AP showed no significant differences from those of the parent strain (E. coli TRFC), and the production of L-threonine (159.3 g L-1 ) and glucose conversion percentage (51.4%) were increased by 10.9% and 9.1%, respectively, compared with those of E. coli TRFC. During threonine production (culture time of 20 h), E. coli TRFC-AP exhibited higher activities of key enzymes for glucose utilization (hexokinase, glucose phosphate dehydrogenase, phosphofructokinase, phosphoenolpyruvate carboxylase, and PYK) and threonine synthesis (glutamate synthase, aspartokinase, homoserine dehydrogenase, homoserine kinase and threonine synthase) compared to those of E. coli TRFC. The analysis of metabolic flux distribution indicated that the flux of threonine with E. coli TRFC-AP reached 69.8%, an increase of 16.0% compared with that of E. coli TRFC. Overall, higher L-threonine production and glucose conversion percentage were obtained with E. coli TRFC-AP due to increased activities of key enzymes and improved carbon flux for threonine synthesis.
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Affiliation(s)
- Likun Cheng
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Jing Wang
- Department of Critical Care Medicine, Affiliated Hospital of Binzhou Medical University, Binzhou, China
| | - Xiubao Zhao
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Huanhuan Yin
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Haitian Fang
- Research and Development Center, Ningxia Eppen Biotech Co., Ltd, Yinchuan, China.,Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, China
| | - Chuwen Lin
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Shasha Zhang
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Zhiqiang Shen
- Shandong Research Center of High Cell Density Fermentation and Efficient Expression Technology, Shandong Lvdu Bio-science and Technology Co., Ltd, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Chunguang Zhao
- Research and Development Center, Ningxia Eppen Biotech Co., Ltd, Yinchuan, China.,Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, China
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Cheng L, Li F, Li S, Lin C, Fu Q, Yin H, Tian F, Qu G, Wu J, Shen Z. A novel nicotinamide adenine dinucleotide control strategy for increasing the cell density of Haemophilus parasuis. Biotechnol Prog 2019; 35:e2794. [PMID: 30816004 DOI: 10.1002/btpr.2794] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 02/22/2019] [Accepted: 02/24/2019] [Indexed: 11/12/2022]
Abstract
Haemophilus parasuis is the causative agent of Glässer's disease and is a major source of economic losses in the swine industry each year. To enhance the production of an inactivated vaccine against H. parasuis, the availability of nicotinamide adenine dinucleotide (NAD) must be carefully controlled to ensure a sufficiently high cell density of H. parasuis. In the present study, the real-time viable cell density of H. parasuis was calculated based on the capacitance of the culture. By assessing the relationship between capacitance and viable cell density/NAD concentration, the NAD supply rate could be adjusted in real time to maintain the NAD concentration at a set value based on the linear relationship between capacitance and NAD consumption. The linear relationship between cell density and addition of NAD indicated that 7.138 × 109 NAD molecules were required to satisfy per cell growth. Five types of NAD supply strategy were used to maintain different NAD concentration for H. parasuis cultivation, and the results revealed that the highest viable cell density (8.57, OD600 ) and cell count (1.57 × 1010 CFU/mL) were obtained with strategy III (NAD concentration maintained at 30 mg/L), which were 1.46- and 1.45- times more, respectively, than cultures with using NAD supply strategy I (NAD concentration maintained at 10 mg/L). An extremely high cell density of H. parasuis was achieved using this NAD supply strategy, and the results demonstrated a convenient and reliable method for determining the real-time viable cell density relative to NAD concentration. Moreover, this method provides a theoretical foundation and an efficient approach for high cell density cultivation of other auxotroph bacteria.
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Affiliation(s)
- Likun Cheng
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China.,Key Laboratory of Binzhou High Cell Density Fermentation, Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, China
| | - Feng Li
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China.,Key Laboratory of Binzhou High Cell Density Fermentation, Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, China
| | - Shuguang Li
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China.,Key Laboratory of Binzhou High Cell Density Fermentation, Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, China
| | - Chuwen Lin
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Qiang Fu
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Huanhuan Yin
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Fengrong Tian
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Guanggang Qu
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
| | - Jiaqiang Wu
- Institution of Poultry, Shandong Academy of Agricultural Science, Jinan, China
| | - Zhiqiang Shen
- Post-doctoral Scientific Research Workstation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, China
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Cheng L, Yang X, Li S, Fu Q, Fu S, Wang J, Li F, Lei L, Shen Z. Impact of gene modification of phosphotransferase system on expression of glutamate dehydrogenase protein of Streptococcus suis in Escherichia coli. BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1304179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Likun Cheng
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
- Post-doctoral Studies Center, College of Animal Medicine, Jilin University, Changchun, P.R. China
- Shandong Binzhou Research, Development and Promotion Center For Livestock and Poultry Propolis Vaccine, Binzhou, P.R. China
- Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, P.R. China
| | - Xiuyan Yang
- Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, P.R. China
| | - Shuguang Li
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
- Shandong Binzhou Research, Development and Promotion Center For Livestock and Poultry Propolis Vaccine, Binzhou, P.R. China
| | - Qiang Fu
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
| | - Shijun Fu
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
| | - Jinliang Wang
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
| | - Feng Li
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
- Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, P.R. China
| | - Liancheng Lei
- Post-doctoral Studies Center, College of Animal Medicine, Jilin University, Changchun, P.R. China
| | - Zhiqiang Shen
- Post-doctoral Scientific Research Workstation, Key Laboratory of High Cell Density Fermentation, Shandong Binzhou Animal Science and Veterinary Medicine Academy, Binzhou, P.R. China
- Shandong Binzhou Research, Development and Promotion Center For Livestock and Poultry Propolis Vaccine, Binzhou, P.R. China
- Shandong Lvdu Bio-science and Technology Co. Ltd., Binzhou, P.R. China
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Lin C, Cheng L, Wang J, Zhang S, Fu Q, Li S, Li F, Han W, Shen Z. Optimization of culture conditions to improve the expression level of beta1–epsilon toxin ofClostridium perfringenstype B inEscherichia coli. BIOTECHNOL BIOTEC EQ 2016. [DOI: 10.1080/13102818.2015.1126201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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