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Li L, Xie Z, Ning J, Zhang Y, Sang Y, Zhang L, Liu F. An acid-tolerant Clostridium sp. BLY-1 strain with high biohydrogen production rate. BIORESOURCE TECHNOLOGY 2024:131227. [PMID: 39117241 DOI: 10.1016/j.biortech.2024.131227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 07/18/2024] [Accepted: 08/04/2024] [Indexed: 08/10/2024]
Abstract
Screening and isolating acid-tolerant bacteria capable of efficient hydrogen production can mitigate the inhibitory effects on microbial activity caused by rapid pH drops during fermentation. In this study, we isolated an acid-tolerant and highly efficient hydrogen-producing bacterium, named Clostridium sp. BLY-1, from acidic soil. Compared to the model strain Clostridium pasteurianum DSM 525, BLY-1 demonstrates a faster growth rate and superior hydrogen production capabilities. At an initial pH of 4.0, BLY-1's hydrogen production is 7.5 times greater than that of DSM 525, and under optimal conditions (pH=5.0), BLY-1's hydrogen production rate is 42.13 % higher than DSM 525. Genomic analysis revealed that BLY-1 possesses a complete CiaRH two-component system and several stress-resistance components absent in DSM 525, which enhance its growth and hydrogen production in acidic environments. These findings provide a novel avenue for boosting the hydrogen production capabilities of Clostridium strains, offering new resources for advancing the green hydrogen industry.
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Affiliation(s)
- Liangyan Li
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300350, PR China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China
| | - Zhangzhang Xie
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China
| | - Jiarui Ning
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300350, PR China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China
| | - Yuechao Zhang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China
| | - Yuxuan Sang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China
| | - Liyun Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300350, PR China.
| | - Fanghua Liu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, 266237, PR China.
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2
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Wang Z, Zhang Z, Shi Q, Liu S, Wu Q, Wang Z, Saiding E, Han J, Zhou J, Wang R, Su X. Comparison of Lactiplantibacillus plantarum isolates from the gut of mice supplemented with different types of nutrients: a genomic and metabolomic study. Front Microbiol 2023; 14:1295058. [PMID: 38033563 PMCID: PMC10684713 DOI: 10.3389/fmicb.2023.1295058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Many studies have focused on the influence of dietary supplements on gut microbiota composition, but limited research have reported their effects on specific bacterial species in the gut. Lactiplantibacillus plantarum is one of the most widely studied probiotics, with a wide range of sources and good environmental adaptability. In this study, in order to elucidate the adaptation strategies of L. plantarum to the gut of mice supplemented with carbohydrates, peptides and minerals, whole genome resequencing and intracellular metabolites detection were performed, and high-frequency mutant genes and differential metabolites were screened. The results suggested different types of dietary supplements do have different effects on L. plantarum from the gut of mice. Additionally, KEGG annotation unveiled that the effects of these dietary supplements on the gene level of L. plantarum primarily pertained to environmental information processing, while the differential metabolites were predominantly associated with metabolism. This study provided new perspectives on the adaptive mechanism of L. plantarum in response to the host's gut environment, suggesting that the diversity of the genome and metabolome of L. plantarum was correlated with dietary supplements. Furthermore, this study offered useful guidance in the effective utilization of dietary supplements.
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Affiliation(s)
- Ziyan Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Zhixuan Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Qiuyue Shi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Songyi Liu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Qiaoli Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Ze Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Emilaguli Saiding
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Jiaojiao Han
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Jun Zhou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Rixin Wang
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Xiurong Su
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Ningbo, China
- Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo, China
- School of Marine Sciences, Ningbo University, Ningbo, China
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3
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Sepúlveda-Correa A, Monsalve L, Polania J, Mestanza O, Vanegas J. Effect of salinity on genes involved in the stress response in mangrove soils. Antonie Van Leeuwenhoek 2023; 116:1171-1184. [PMID: 37682363 DOI: 10.1007/s10482-023-01856-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/02/2023] [Indexed: 09/09/2023]
Abstract
Mangroves are a challenging ecosystem for the microorganisms that inhabit them, considering they are subjected to stressful conditions such as high and fluctuating salinity. Metagenomic analysis of mangrove soils under contrasting salinity conditions was performed at the mouth of the Ranchera River to the Caribbean Sea in La Guajira, Colombia, using shotgun sequencing and the Illumina Hiseq 2500 platform. Functional gene analysis demonstrated that salinity could influence the abundance of microbial genes involved in osmoprotectant transport, DNA repair, heat shock proteins (HSP), and Quorum Sensing, among others. In total, 135 genes were discovered to be linked to 12 pathways. Thirty-four genes out of 10 pathways had statistical differences for a p-value and FDR < 0.05. UvrA and uvrB (nucleotide excision repair), groEL (HSP), and secA (bacterial secretion system) genes were the most abundant and were enriched by high salinity. The results of this study showed the prevalence of diverse genetic mechanisms that bacteria use as a response to survive in the challenging mangrove, as well as the presence of various genes that are recruited in order to maintain bacterial homeostasis under conditions of high salinity.
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Affiliation(s)
- Alejandro Sepúlveda-Correa
- Natural Sciences Department, Université du Québec en Outaouais, 58 Rue Principale, Ripon, QC, J0V 1V0, Canada
- Universidad Nacional de Colombia Sede Medellín, Cra. 65 #59a-110, Medellín, Colombia
| | | | - Jaime Polania
- Universidad Nacional de Colombia Sede Medellín, Cra. 65 #59a-110, Medellín, Colombia
| | - Orson Mestanza
- Instituto Nacional de Salud, Cápac Yupanqui 1400 - Jesus María, Lima, Perú
| | - Javier Vanegas
- Universidad Antonio Nariño, Sede Circunvalar, Cra 3 Este No. 47 A 15, Bogotá, Colombia.
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Li Q, Hu K, Mou J, Li J, Liu A, Ao X, Yang Y, He L, Chen S, Zou L, Guo M, Liu S. Insight into the acid tolerance mechanism of Acetilactobacillus jinshanensis subsp. aerogenes Z-1. Front Microbiol 2023; 14:1226031. [PMID: 37520381 PMCID: PMC10382275 DOI: 10.3389/fmicb.2023.1226031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023] Open
Abstract
Several lactic acid bacteria (LAB) are double-edged swords in the production of Sichuan bran vinegar; on the one hand, they are important for the flavour of the vinegar, but on the other hand, they result in vinegar deterioration because of their gas-producing features and their acid resistance. These characteristics intensify the difficulty in managing the safe production of vinegar using strains such as Acetilactobacillus jinshanensis subsp. aerogenes Z-1. Therefore, it is necessary to characterize the mechanisms underlying their acid tolerance. The results of this study showed a survival rate of 77.2% for Z-1 when exposed to pH 3.0 stress for 1 h. This strain could survive for approximately 15 days in a vinegar solution with 4% or 6% total acid content, and its growth was effectively enhanced by the addition of 10 mM of arginine (Arg). Under acidic stress, the relative content of the unsaturated fatty acid C18:1 (n-11) increased, and eight amino acids accumulated in the cells. Meanwhile, based on a transcriptome analysis, the genes glnA, carA/B, arcA, murE/F/G, fabD/H/G, DnaK, uvrA, opuA/C, fliy, ecfA2, dnaA and LuxS, mainly enriched in amino acid transport and metabolism, protein folding, DNA repair, and cell wall/membrane metabolism processes, were hypothesized to be acid resistance-related genes in Z-1. This work paves the way for further clarifying the acid tolerance mechanism of Z-1 and shares applicable perspectives for vinegar brewing.
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Affiliation(s)
- Qin Li
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Kaidi Hu
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Juan Mou
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Jianlong Li
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Aiping Liu
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Xiaolin Ao
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Yong Yang
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Li He
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Shujuan Chen
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
| | - Likou Zou
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mingye Guo
- Sichuan Baoning Vinegar Co., Ltd, Langzhong, Sichuan, China
| | - Shuliang Liu
- College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan, China
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5
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Bryukhanov AL, Klimko AI, Netrusov AI. Antioxidant Properties of Lactic Acid Bacteria. Microbiology (Reading) 2022. [DOI: 10.1134/s0026261722601439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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6
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Li XL, Cui JJ, Zheng WS, Zhang JL, Li R, Ma XL, Lin M, Guo HH, Li C, Yu XY, Du P, Zhao LM, He S, Lan P, Jiang JD, Che Y, Wang LL. Bicyclol Alleviates Atherosclerosis by Manipulating Gut Microbiota. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105021. [PMID: 35088527 DOI: 10.1002/smll.202105021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Atherosclerosis (AS) is associated with high morbidity and mortality, thus imposing a growing burden on modern society. Herb-derived bicyclol (BIC) is a versatile bioactive compound that can be used to treat AS. However, its efficacy in AS is not yet described. Here, it is shown that BIC normalizes gut microflora dysbiosis induced by a high fat diet in Apoe(-/-) mice. Metagenome-wide association study analysis verifies that the modulation on carbohydrate-active enzymes and short-chain fatty acid generating genes in gut flora is among the mechanisms. The gut healthiness, especially the gut immunity and integrity, is restored by BIC intervention, leading to improved systemic immune cell dynamic and liver functions. Accordingly, the endothelial activation, macrophage infiltration, and cholesterol ester accumulation in the aortic arch are alleviated by BIC to lessen the plaque onset. Moreover, it is proved that the therapeutic effect of BIC on AS is transmissible by fecal microbiota transplantation. The current study, for the first time, demonstrates the antiatherosclerotic effects of BIC and shows that its therapeutic value can at least partially be attributed to its manipulation of gut microbiota.
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Affiliation(s)
- Xiao-Lin Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Jin-Jin Cui
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Wen-Sheng Zheng
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Jin-Lan Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Rui Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Xiao-Lei Ma
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Miao Lin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Hui-Hui Guo
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Cong Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Xiao-You Yu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Peng Du
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Li-Min Zhao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Shuwang He
- College of Pharmacy, Shandong University, Beijing, 250012, China
| | - Pei Lan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Jian-Dong Jiang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Yongsheng Che
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
| | - Lu-Lu Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100050, China
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Proteomic response strategies of Pediococcus pentosaceus R1 isolated from Harbin dry sausages to oxidative stress. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liu Y, Qiu Y, Yin Q, Li X, Bai Q, Li Y, Xiao H. iTRAQ-based quantitative proteomic reveals proteomic changes in Serratia sp. CM01 and mechanism of Cr(Ⅵ) resistance. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:112899. [PMID: 34823212 DOI: 10.1016/j.ecoenv.2021.112899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/29/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE Serratia sp. CM01 is a wild strain with the resistance and reduction ability of chromium(Ⅵ). The aim of this study it to investigate the underlying mechanisms of the Cr(Ⅵ) tolerance and reduction of strain CM01, and to explore its response to environmental pollution pressure at the molecular level. METHODS The iTRAQ technique was utilized to investigate the differentially expressed protein patterns related to the Cr(Ⅵ)-resistance in wild-type strain CM01 and domesticated CM01. RT-qPCR was used to verify the expression levels of several functional genes. The cell surface hydrophobicity and autoaggregation, the intracellular glucose content, and the total superoxide dismutase (SOD) activity were determined. RESULTS In total, 2750 proteins were detected and identified in WT CM01 and domesticated CM01. Compared with WT CM01, the iTRAQ results of 646 proteins were found to be significantly differentially expressed in domesticated CM01. There were 343 up-regulated and 303 down-regulated proteins, which mainly related to carbohydrate metabolism, stress responses, amino acid metabolism and some other systems. RT-qPCR results showed that the expression level of seven genes in domesticated CM01 were consistent with the iTRAQ proteomic profiles. The cell surface hydrophobicity, self-aggregation, intracellular glucose content and total SOD activity of domesticated CM01 with Cr(Ⅵ) treatment were significantly higher than without Cr(Ⅵ) treatment. CONCLUSION Domesticated CM01 displayed a complex biological network to exhibit the tolerance of Cr(Ⅵ), which may be attributed to the following aspects: (a) CM01 reduced the consumption of glucose by inhibiting the metabolism of carbohydrates, which was an energy-saving survival mode. (b) The inositol phosphate metabolism pathway played an important role. (c) Oxidative stress proteins enhanced the adaptability. (d) CM01 enhanced biosynthesis of hydrophobic amino acids to resistance to Cr(Ⅵ). (e) Several key systems and proteins, such as UvrABC system, Lon protease, porin OmpC, also may play an important role.
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Affiliation(s)
- Yuan Liu
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China; Center for Disease Control and Prevention, Chongqing 400010, China
| | - Yanlun Qiu
- Center for Disease Control and Prevention, Beibei District, Chongqing 400700, China
| | - Qi Yin
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China
| | - Xinglong Li
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China
| | - Qunhua Bai
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China
| | - Yingli Li
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China
| | - Hong Xiao
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, China.
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Qi Y, Wang H, Chen X, Wei G, Tao S, Fan M. Altered Metabolic Strategies: Elaborate Mechanisms Adopted by Oenococcus oeni in Response to Acid Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:2906-2918. [PMID: 33587641 DOI: 10.1021/acs.jafc.0c07599] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Oenococcus oeni plays a key role in inducing malolactic fermentation in wine. Acid stress is often encountered under wine conditions. However, the lack of systematic studies of acid resistance mechanisms limits the downstream fermentation applications. In this study, the acid responses of O. oeni were investigated by combining transcriptome, metabolome, and genome-scale metabolic modeling approaches. Metabolite profiling highlighted the decreased abundance of nucleotides under acid stress. The gene-metabolite bipartite network showed negative correlations between nucleotides and genes involved in ribosome assembly, translation, and post-translational processes, suggesting that stringent response could be activated under acid stress. Genome-scale metabolic modeling revealed marked flux rerouting, including reallocation of pyruvate, attenuation of glycolysis, utilization of carbon sources other than glucose, and enhancement of nucleotide salvage and the arginine deiminase pathway. This study provided novel insights into the acid responses of O. oeni, which will be useful for designing strategies to address acid stress in wine malolactic fermentation.
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Affiliation(s)
- Yiman Qi
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hao Wang
- College of Life Sciences and State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
- Bioinformatics Center, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiangdan Chen
- College of Life Sciences and State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
- Bioinformatics Center, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Gehong Wei
- College of Life Sciences and State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shiheng Tao
- College of Life Sciences and State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
- Bioinformatics Center, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingtao Fan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
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10
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Feng T, Wang J. Oxidative stress tolerance and antioxidant capacity of lactic acid bacteria as probiotic: a systematic review. Gut Microbes 2020; 12:1801944. [PMID: 32795116 PMCID: PMC7524341 DOI: 10.1080/19490976.2020.1801944] [Citation(s) in RCA: 182] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/15/2020] [Indexed: 02/03/2023] Open
Abstract
Lactic acid bacteria (LAB) are the most frequently used probiotics in fermented foods and beverages and as food supplements for humans or animals, owing to their multiple beneficial features, which appear to be partially associated with their antioxidant properties. LAB can help improve food quality and flavor and prevent numerous disorders caused by oxidation in the host. In this review, we discuss the oxidative stress tolerance, the antioxidant capacity related herewith, and the underlying mechanisms and signaling pathways in probiotic LAB. In addition, we discuss appropriate methods used to evaluate the antioxidant capacity of probiotic LAB. The aim of the present review is to provide an overview of the current state of the research associated with the oxidative stress tolerance and antioxidant capacity of LAB.
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Affiliation(s)
- Tao Feng
- Institute of Animal Husbandry and Veterinary Medicine (IAHVM), Beijing Academy of Agriculture and Forestry Sciences (BAAFS), Beijing, China
- Sino-US Joint Laboratory of Animal Science, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Jing Wang
- Institute of Animal Husbandry and Veterinary Medicine (IAHVM), Beijing Academy of Agriculture and Forestry Sciences (BAAFS), Beijing, China
- Sino-US Joint Laboratory of Animal Science, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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11
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Gao Y, Liu Y, Ma F, Sun M, Mu G, Tuo Y. Global transcriptomic and proteomics analysis of Lactobacillus plantarum Y44 response to 2,2-azobis(2-methylpropionamidine) dihydrochloride (AAPH) stress. J Proteomics 2020; 226:103903. [PMID: 32682107 DOI: 10.1016/j.jprot.2020.103903] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/23/2020] [Accepted: 07/11/2020] [Indexed: 12/22/2022]
Abstract
Our previous study demonstrated that Lactobacillus plantarum Y44 exhibited antioxidant activity. However, the physiological characteristics of L. plantarum Y44 exposure to oxidative stress was not clear. In this research, the differentially expressed proteins and genes in L. plantarum Y44 under 2,2-azobis(2-methylpropionamidine) dihydrochloride (AAPH) stress at different concentrations were studied by using integrated transcriptomic and proteomic methods. Under 100 mM AAPH stress condition, 1139 differentially expressed genes (DEGs, 546 up-regulated and 593 down-regulated) and 329 differentially expressed proteins (DEPs, 127 up-regulated and 202 down-regulated) were observed. Under 200 mM AAPH stress condition, 1526 DEGs (751 up-regulated and 775 down-regulated) and 382 DEPs (139 up-regulated and 243 down-regulated) were observed. Overall, we found that L. plantarum Y44 fought against AAPH induced oxidative stress by up-regulating antioxidant enzymes and DNA repair proteins, such as ATP-dependent DNA helicase RuvA, adenine DNA glycosylase, single-strand DNA-binding protein SSB, DNA-binding ferritin-like protein DPS, thioredoxin reductase, protein-methionine-S-oxide reductase and glutathione peroxidase. Additionally, cell envelope composition of L. plantarum Y44 was highly remodeled by accelerating peptidoglycan and teichoic-acid (LTA) biosynthesis and modulating the fatty acids (FA) composition to achieve a higher ratio of unsaturated/saturated fatty acids (UFAs/SFAs) against AAPH stress. Moreover, metabolism processes including carbohydrate metabolism, amino acid biosynthesis, and nucleotide metabolism altered to respond to AAPH-induced damage. Altogether, our findings allow us to facilitate a better understanding of L. plantarum Y44 against oxidative stress. SIGNIFICANCE: This study represents an integrated proteomic and transcriptomic analysis of Lactobacillus plantarum Y44 response to 2,2-azobis(2-methylpropionamidine) dihydrochloride (AAPH) stress. Differentially expressed proteins and genes were identified between the proteome and transcriptome of L. plantarum Y44 under different AAPH stress. AAPH-induced response of L. plantarum Y44 appears to be primarily based on ROS scavenging, DNA repair, highly remodeled cell surface and specific metabolic processes. The knowledge about these proteomes and transcriptomes provides significant insights into the oxidative stress response of Lactobacillus plantarum.
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Affiliation(s)
- Yuan Gao
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China; Dalian probiotics function research key laboratory, Dalian Polytechnic University, Dalian 116034, China
| | - Yujun Liu
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China
| | - Fenglian Ma
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China; Dalian probiotics function research key laboratory, Dalian Polytechnic University, Dalian 116034, China
| | - Mengying Sun
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China; Dalian probiotics function research key laboratory, Dalian Polytechnic University, Dalian 116034, China
| | - Guangqing Mu
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China; Dalian probiotics function research key laboratory, Dalian Polytechnic University, Dalian 116034, China.
| | - Yanfeng Tuo
- School of food science and technology, Dalian Polytechnic University, Dalian 116034, China; Dalian probiotics function research key laboratory, Dalian Polytechnic University, Dalian 116034, China.
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12
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The Potential of Lactobacillus spp. for Modulating Oxidative Stress in the Gastrointestinal Tract. Antioxidants (Basel) 2020; 9:antiox9070610. [PMID: 32664392 PMCID: PMC7402165 DOI: 10.3390/antiox9070610] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022] Open
Abstract
The gastrointestinal (GI) tract is crucial for food digestion and nutrient absorption in humans. However, the GI tract is usually challenged with oxidative stress that can be induced by various factors, such as exogenous pathogenic microorganisms and dietary alterations. As a part of gut microbiota, Lactobacillus spp. play an important role in modulating oxidative stress in cells and tissues, especially in the GI tract. Oxidative stress is linked with excessive reactive oxygen species (ROS) that can be formed by a few enzymes, such as nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs). The redox mechanisms of Lactobacillus spp. may contribute to the downregulation of these ROS-forming enzymes. In addition, nuclear factor erythroid 2 (NFE2)-related factor 2 (Nrf-2) and nuclear factor kappa B (NF-κB) are two common transcription factors, through which Lactobacillus spp. modulate oxidative stress as well. As oxidative stress is closely associated with inflammation and certain diseases, Lactobacillus spp. could potentially be applied for early treatment and amelioration of these diseases, either individually or together with prebiotics. However, further research is required for revealing their mechanisms of action as well as their extensive application in the future.
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Mu G, Gao Y, Tuo Y, Li H, Zhang Y, Qian F, Jiang S. Assessing and comparing antioxidant activities of lactobacilli strains by using different chemical and cellular antioxidant methods. J Dairy Sci 2018; 101:10792-10806. [DOI: 10.3168/jds.2018-14989] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 08/02/2018] [Indexed: 01/10/2023]
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Zheng Y, Wang J, Bai X, Chang Y, Mou J, Song J, Wang M. Improving the acetic acid tolerance and fermentation of Acetobacter pasteurianus by nucleotide excision repair protein UvrA. Appl Microbiol Biotechnol 2018; 102:6493-6502. [PMID: 29785501 DOI: 10.1007/s00253-018-9066-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 04/27/2018] [Accepted: 05/01/2018] [Indexed: 01/20/2023]
Abstract
Acetic acid bacteria (AAB) are widely used in acetic acid fermentation due to their remarkable ability to oxidize ethanol and high tolerance against acetic acid. In Acetobacter pasteurianus, nucleotide excision repair protein UvrA was up-regulated 2.1 times by acetic acid when compared with that without acetic acid. To study the effects of UvrA on A. pasteurianus acetic acid tolerance, uvrA knockout strain AC2005-ΔuvrA, uvrA overexpression strain AC2005 (pMV24-uvrA), and the control strain AC2005 (pMV24), were constructed. One percent initial acetic acid was almost lethal to AC2005-ΔuvrA. However, the biomass of the UvrA overexpression strain was higher than that of the control under acetic acid concentrations. After 6% acetic acid shock for 20 and 40 min, the survival ratios of AC2005 (pMV24-uvrA) were 2 and 0.12%, respectively; however, they were 1.5 and 0.06% for the control strain AC2005 (pMV24). UvrA overexpression enhanced the acetification rate by 21.7% when compared with the control. The enzymes involved in ethanol oxidation and acetic acid tolerance were up-regulated during acetic acid fermentation due to the overexpression of UvrA. Therefore, in A. pasteurianus, UvrA could be induced by acetic acid and is related with the acetic acid tolerance by protecting the genome against acetic acid to ensure the protein expression and metabolism.
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Affiliation(s)
- Yu Zheng
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Jing Wang
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Xiaolei Bai
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Yangang Chang
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Jun Mou
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Jia Song
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
| | - Min Wang
- State Key Laboratory of Food Nutrition and Safety; Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control; College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China.
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Hagi T, Kobayashi M, Nomura M. Whole-transcriptome analysis of oxidative stress response genes in carotenoid-producing Enterococcus gilvus. Biosci Biotechnol Biochem 2017; 82:1053-1057. [PMID: 29161967 DOI: 10.1080/09168451.2017.1399790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Whole-transcriptome analysis of aerobic stress response gene in Enterococcus gilvus was performed using RNA-sequencing to identify carotenoid-based stress response genes in lactic acid bacteria. The expression of gene responsible for pyruvate dehydrogenase complex synthesis was highly upregulated after aerobic treatment. In addition, the expression of transcriptional regulator spx and genes encoding UvrABC system protein was also upregulated.
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Affiliation(s)
- Tatsuro Hagi
- a Animal Products Research Division, Institute of Livestock and Grassland Science , National Agriculture and Food Research Organization (NARO) , Ibaraki , Japan
| | - Miho Kobayashi
- a Animal Products Research Division, Institute of Livestock and Grassland Science , National Agriculture and Food Research Organization (NARO) , Ibaraki , Japan
| | - Masaru Nomura
- a Animal Products Research Division, Institute of Livestock and Grassland Science , National Agriculture and Food Research Organization (NARO) , Ibaraki , Japan
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16
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Vibrational spectroscopy combined with transcriptomic analysis for investigation of bacterial responses towards acid stress. Appl Microbiol Biotechnol 2017; 102:333-343. [DOI: 10.1007/s00253-017-8561-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/21/2017] [Accepted: 09/27/2017] [Indexed: 11/26/2022]
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17
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Mechanisms and improvement of acid resistance in lactic acid bacteria. Arch Microbiol 2017; 200:195-201. [DOI: 10.1007/s00203-017-1446-2] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 10/16/2017] [Accepted: 10/19/2017] [Indexed: 01/19/2023]
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18
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Molecular mechanisms and in vitro antioxidant effects of Lactobacillus plantarum MA2. Food Chem 2017; 221:1642-1649. [DOI: 10.1016/j.foodchem.2016.10.124] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/21/2016] [Accepted: 10/27/2016] [Indexed: 12/11/2022]
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19
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Moghaddam TK, Zhang J, Du G. UvrA expression of Lactococcus lactis NZ9000 improve multiple stresses tolerance and fermentation of lactic acid against salt stress. Journal of Food Science and Technology 2017; 54:639-649. [PMID: 28298677 DOI: 10.1007/s13197-017-2493-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/30/2016] [Accepted: 01/11/2017] [Indexed: 11/25/2022]
Abstract
Lactococcus lactis is subjected to several stressful conditions during industrial fermentation including oxidation, heating and cooling, acid, high osmolarity/dehydration and starvation. DNA lesion is a major cause of genetic instability in L. lactis that usually occurs at a low frequency, but it is greatly enhanced by environmental stresses. DNA damages produced by these environmental stresses are thought to induce DNA double-strand breaks, leading to illegitimate recombination. Nucleotide excision repair (NER) protein UvrA suppresses multiple stresses-induced illegitimate recombination. UvrA protein can survive a coincident condition of environmental harsh conditions, multiple stress factors supposedly encountered in the host and inducing UvrA in L. lactis. In this study the expression of UvrA and growth performance and viability of control strain L. lactisVector and recombinant strain L. lactisUvrA under multiple stress conditions were determined. The recombinants strain had 30.70 and 52.67% higher growth performances when subjected to acidic and osmotic stresses conditions. In addition, the L. lactisUvrA strain showed 1.85-, 1.65-, and 2.40-fold higher biomass, lactate production, and lactate productivity, compared with the corresponding values for L. lactisVector strain during the osmotic stress. Results demonstrated NER system is involved in adaptation to various stress conditions and suggested that cells with a compromised UvrA as DNA repair system have an enhanced protection behavior in L. lactis NZ9000 against DNA damage.
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Affiliation(s)
- Taher Khakpour Moghaddam
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122 People's Republic of China.,School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122 People's Republic of China
| | - Juan Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122 People's Republic of China.,School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122 People's Republic of China
| | - Guocheng Du
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122 People's Republic of China.,School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122 People's Republic of China
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20
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Abstract
Lactic acid bacteria (LAB) are important starter, commensal, or pathogenic microorganisms. The stress physiology of LAB has been studied in depth for over 2 decades, fueled mostly by the technological implications of LAB robustness in the food industry. Survival of probiotic LAB in the host and the potential relatedness of LAB virulence to their stress resilience have intensified interest in the field. Thus, a wealth of information concerning stress responses exists today for strains as diverse as starter (e.g., Lactococcus lactis), probiotic (e.g., several Lactobacillus spp.), and pathogenic (e.g., Enterococcus and Streptococcus spp.) LAB. Here we present the state of the art for LAB stress behavior. We describe the multitude of stresses that LAB are confronted with, and we present the experimental context used to study the stress responses of LAB, focusing on adaptation, habituation, and cross-protection as well as on self-induced multistress resistance in stationary phase, biofilms, and dormancy. We also consider stress responses at the population and single-cell levels. Subsequently, we concentrate on the stress defense mechanisms that have been reported to date, grouping them according to their direct participation in preserving cell energy, defending macromolecules, and protecting the cell envelope. Stress-induced responses of probiotic LAB and commensal/pathogenic LAB are highlighted separately due to the complexity of the peculiar multistress conditions to which these bacteria are subjected in their hosts. Induction of prophages under environmental stresses is then discussed. Finally, we present systems-based strategies to characterize the "stressome" of LAB and to engineer new food-related and probiotic LAB with improved stress tolerance.
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Gaudreau H, Champagne CP, Remondetto GE, Alvarez PA, Gomaa A, Subirade M. Tea extract render probiotic Lactobacillus helveticus more resistant to oxygen exposure through lipid modification mechanism. Food Res Int 2016. [DOI: 10.1016/j.foodres.2015.12.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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22
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Stress tolerance and virulence of insect-pathogenic fungi are determined by environmental conditions during conidial formation. Curr Genet 2015; 61:383-404. [PMID: 25791499 DOI: 10.1007/s00294-015-0477-y] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 01/29/2015] [Accepted: 01/30/2015] [Indexed: 01/07/2023]
Abstract
The virulence to insects and tolerance to heat and UV-B radiation of conidia of entomopathogenic fungi are greatly influenced by physical, chemical, and nutritional conditions during mycelial growth. This is evidenced, for example, by the stress phenotypes of Metarhizium robertsii produced on various substrates. Conidia from minimal medium (Czapek's medium without sucrose), complex medium, and insect (Lepidoptera and Coleoptera) cadavers had high, moderate, and poor tolerance to UV-B radiation, respectively. Furthermore, conidia from minimal medium germinated faster and had increased heat tolerance and were more virulent to insects than those from complex medium. Low water-activity or alkaline culture conditions also resulted in production of conidia with high tolerance to heat or UV-B radiation. Conidia produced on complex media exhibited lower stress tolerance, whereas those from complex media supplemented with NaCl or KCl (to reduce water activity) were more tolerant to heat and UV-B than those from the unmodified complex medium. Osmotic and nutritive stresses resulted in production of conidia with a robust stress phenotype, but also were associated with low conidial yield. Physical conditions such as growth under illumination, hypoxic conditions, and heat shock before conidial production also induced both higher UV-B and heat tolerance; but conidial production was not decreased. In conclusion, physical and chemical parameters, as well as nutrition source, can induce great variability in conidial tolerance to stress for entomopathogenic fungi. Implications are discussed in relation to the ecology of entomopathogenic fungi in the field, and to their use for biological control. This review will cover recent technologies on improving stress tolerance of entomopathogenic fungi for biological control of insects.
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Jin J, Zhang B, Guo H, Cui J, Jiang L, Song S, Sun M, Ren F. Mechanism analysis of acid tolerance response of bifidobacterium longum subsp. longum BBMN 68 by gene expression profile using RNA-sequencing. PLoS One 2012; 7:e50777. [PMID: 23236393 PMCID: PMC3517610 DOI: 10.1371/journal.pone.0050777] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 10/24/2012] [Indexed: 12/17/2022] Open
Abstract
To analyze the mechanism of the acid tolerance response (ATR) in Bifidobacterium longum subsp. longum BBMN68, we optimized the acid-adaptation condition to stimulate ATR effectively and analyzed the change of gene expression profile after acid-adaptation using high-throughput RNA-Seq. After acid-adaptation at pH 4.5 for 2 hours, the survival rate of BBMN68 at lethal pH 3.5 for 120 min was increased by 70 fold and the expression of 293 genes were upregulated by more than 2 fold, and 245 genes were downregulated by more than 2 fold. Gene expression profiling of ATR in BBMN68 suggested that, when the bacteria faced acid stress, the cells strengthened the integrity of cell wall and changed the permeability of membrane to keep the H+ from entering. Once the H+ entered the cytoplasm, the cells showed four main responses: First, the F0F1-ATPase system was initiated to discharge H+. Second, the ability to produce NH3 by cysteine-cystathionine-cycle was strengthened to neutralize excess H+. Third, the cells started NER-UVR and NER-VSR systems to minimize the damage to DNA and upregulated HtpX, IbpA, and γ-glutamylcysteine production to protect proteins against damage. Fourth, the cells initiated global response signals ((p)ppGpp, polyP, and Sec-SRP) to bring the whole cell into a state of response to the stress. The cells also secreted the quorum sensing signal (AI-2) to communicate between intraspecies cells by the cellular signal system, such as two-component systems, to improve the overall survival rate. Besides, the cells varied the pathways of producing energy by shifting to BCAA metabolism and enhanced the ability to utilize sugar to supply sufficient energy for the operation of the mechanism mentioned above. Based on these reults, it was inferred that, during industrial applications, the acid resistance of bifidobacteria could be improved by adding BCAA, γ-glutamylcysteine, cysteine, and cystathionine into the acid-stress environment.
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Affiliation(s)
- Junhua Jin
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Bing Zhang
- Core Genomic Facility, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Huiyuan Guo
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Animal Product, Beijing, China
| | - Jianyun Cui
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Lu Jiang
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Beijing Key Laboratory of Nutrition, Health and Food Safety, Beijing, China
| | - Shuhui Song
- Core Genomic Facility, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Min Sun
- Core Genomic Facility, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Fazheng Ren
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Beijing Key Laboratory of Nutrition, Health and Food Safety, Beijing, China
- * E-mail:
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Compromised DNA damage repair promotes genetic instability of the genomic magnetosome island in Magnetospirillum magneticum AMB-1. Curr Microbiol 2012; 65:98-107. [PMID: 22538470 DOI: 10.1007/s00284-012-0131-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 04/10/2012] [Indexed: 10/28/2022]
Abstract
Magnetotactic bacteria (MTB) are capable of synthesizing nano-sized, intracellular membrane-bound magnetosomes. To learn more about the genetic factors involved in magnetosome formation, transposon mutagenesis was carried out by conjugation using a hyperactive mariner transposon to obtain nonmagnetic mutants of Magnetospirillum magneticum AMB-1. A mutant with defect in uvrA gene encoding the DNA binding subunit of the UvrABC complex responsible for the process of nucleotide excision repair, was obtained. Growth, magnetosome formation and maintenance of magnetosome island (MAI) were further analyzed in the absence of UvrA. Interruption of uvrA led to decreased capacity to form magnetosome when cultured in the presence of oxygen. The deficiency in UvrA also resulted in an accelerated loss of the MAI under aerobic conditions indicating that the nucleotide excision repair system guards against the instability of the MAI. The incapacity of MTB to efficiently initiate recombination mediated by RecA rescued the instability of MAI observed in uvrA mutant. Elevated recombination activity resulting from the accumulation of unrepaired mutations may thus account for the instability of MAI in the absence of UvrA.
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25
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Wang JC, Zhang WY, Zhong Z, Wei AB, Bao QH, Zhang Y, Sun TS, Postnikoff A, Meng H, Zhang HP. Transcriptome analysis of probiotic Lactobacillus casei Zhang during fermentation in soymilk. ACTA ACUST UNITED AC 2012; 39:191-206. [DOI: 10.1007/s10295-011-1015-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 06/25/2011] [Indexed: 12/01/2022]
Abstract
Abstract
Lactobacillus casei Zhang is a widely recognized probiotic bacterium, which is being commercially used in China. To study the gene expression dynamics of L. casei Zhang during fermentation in soymilk, a whole genome microarray was used to screen for differentially expressed genes when grown to the lag phase, the late logarithmic phase, and the stationary phase. Comparisons of different transcripts next to each other revealed 162 and 63 significantly induced genes in the late logarithmic phase and stationary phase, of which the expression was at least threefold up-regulated and down-regulated, respectively. Approximately 38.4% of the up-regulated genes were associated with amino acid transport and metabolism notably for histidine and lysine biosynthesis, followed by genes/gene clusters involved in carbohydrate transport and metabolism, lipid transport and metabolism, and inorganic ion transport and metabolism. The analysis results suggest a complex stimulatory effect of soymilk-based ecosystem on the L. casei Zhang growth. On the other hand, it provides the very first insight into the molecular mechanism of L. casei strain for how it will adapt to the protein-rich environment.
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Affiliation(s)
- Ji-Cheng Wang
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Wen-Yi Zhang
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Zhi Zhong
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Ai-Bin Wei
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Qiu-Hua Bao
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Yong Zhang
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Tian-Song Sun
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - Andrew Postnikoff
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
| | - He Meng
- grid.16821.3c 0000000403688293 School of Agriculture and Biology Shanghai Jiao Tong University 200240 Shanghai China
| | - He-Ping Zhang
- grid.411638.9 0000000417569607 Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, School of Food Science and Engineering Inner Mongolia Agricultural University 010018 Huhhot China
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26
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Changes in ffh, uvrA, groES and dnaK mRNA Abundance as a Function of Acid-Adaptation and Growth Phase in Bifidobacterium longum BBMN68 Isolated from Healthy Centenarians. Curr Microbiol 2010; 62:612-7. [DOI: 10.1007/s00284-010-9751-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 08/24/2010] [Indexed: 10/19/2022]
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27
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Ryan S, Hill C, Gahan CGM. Acid stress responses in Listeria monocytogenes. ADVANCES IN APPLIED MICROBIOLOGY 2009; 65:67-91. [PMID: 19026862 DOI: 10.1016/s0065-2164(08)00603-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Sheila Ryan
- Department of Microbiology, University College Cork, Cork, Ireland
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28
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Genes and molecules of lactobacilli supporting probiotic action. Microbiol Mol Biol Rev 2009; 72:728-64, Table of Contents. [PMID: 19052326 DOI: 10.1128/mmbr.00017-08] [Citation(s) in RCA: 626] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Lactobacilli have been crucial for the production of fermented products for centuries. They are also members of the mutualistic microbiota present in the human gastrointestinal and urogenital tract. Recently, increasing attention has been given to their probiotic, health-promoting capacities. Many human intervention studies demonstrating health effects have been published. However, as not all studies resulted in positive outcomes, scientific interest arose regarding the precise mechanisms of action of probiotics. Many reported mechanistic studies have addressed mainly the host responses, with less attention being focused on the specificities of the bacterial partners, notwithstanding the completion of Lactobacillus genome sequencing projects, and increasing possibilities of genomics-based and dedicated mutant analyses. In this emerging and highly interdisciplinary field, microbiologists are facing the challenge of molecular characterization of probiotic traits. This review addresses the advances in the understanding of the probiotic-host interaction with a focus on the molecular microbiology of lactobacilli. Insight into the molecules and genes involved should contribute to a more judicious application of probiotic lactobacilli and to improved screening of novel potential probiotics.
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Brioukhanov AL, Netrusov AI. Aerotolerance of strictly anaerobic microorganisms and factors of defense against oxidative stress: A review. APPL BIOCHEM MICRO+ 2007. [DOI: 10.1134/s0003683807060014] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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