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Yan T, Li M, Wang Q, Wang M, Liu L, Ma C, Xiang X, Zhou Q, Liu Z, Gong Z. Structures, functions, and regulatory networks of universal stress proteins in clinically relevant pathogenic Bacteria. Cell Signal 2024; 116:111032. [PMID: 38185228 DOI: 10.1016/j.cellsig.2023.111032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/14/2023] [Accepted: 12/30/2023] [Indexed: 01/09/2024]
Abstract
Universal stress proteins are a class of proteins widely present in bacteria, archaea, plants, and invertebrates, playing essential roles in bacterial adaptation to various environmental stresses. The functions of bacterial universal stress proteins are versatile, including resistance to oxidative stress, maintenance of cell wall integrity, DNA damage repair, regulation of cell division and growth, among others. When facing stresses such as temperature changes, pH shifts, fluctuations in oxygen concentration, and exposure to toxins, these proteins can bind to specific DNA sequences and rapidly adjust bacterial metabolic pathways and gene expression patterns to adapt to the new environment. In summary, bacterial universal stress proteins play a crucial role in bacterial adaptability and survival. A comprehensive understanding of bacterial stress response mechanisms and the development of new antibacterial strategies are of great significance. This review summarizes the research progress on the structure, function, and regulatory factors of universal stress proteins in clinically relevant bacteria, aiming to facilitate deeper investigations by clinicians and researchers into universal stress proteins.
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Affiliation(s)
- Tao Yan
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Min Li
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Qiuyan Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Meng Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lijuan Liu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chengcheng Ma
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Xiaohong Xiang
- School of Pharmacy, Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Qiang Zhou
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhou Liu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.
| | - Zhen Gong
- Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.
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Li R, Yi Q, Wang J, Miao Y, Chen Q, Xu Y, Tao M. Paeonol promotes longevity and fitness in Caenorhabditis elegans through activating the DAF-16/FOXO and SKN-1/Nrf2 transcription factors. Biomed Pharmacother 2024; 173:116368. [PMID: 38471269 DOI: 10.1016/j.biopha.2024.116368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/17/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Paeonol, as one of the most abundant plant-derived polyphenols, has multiple bioactivities including anti-inflammatory, anti-tumor, and anti-cardiovascular diseases. Nevertheless, the anti-aging effects and related mechanisms of paeonol are rarely reported. In this study, we found that paeonol significantly prolonged the mean lifespan of Caenorhabditis elegans (C. elegans) by 28.49% at a dose of 200 μM. Moreover, paeonol promoted the health of C. elegans by increasing the body bending and pharyngeal pumping rates and reducing the lipofuscin accumulation level. Meanwhile, paeonol induced the expression of stress-related genes or proteins by activating the transcription factors DAF-16/FOXO, SKN-1/Nrf2, and HSF-1, which in turn enhanced oxidative and thermal stress tolerance. The mechanism behind the anti-aging effect of paeonol occurred by down-regulating the insulin/IGF-1 signaling (IIS) pathway. Our findings shed new light on the application of paeonol for longevity promotion and human health.
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Affiliation(s)
- Rong Li
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China
| | - Qingping Yi
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China
| | - Jinsong Wang
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China
| | - Yuanxin Miao
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China
| | - Qingchan Chen
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China
| | - Yan Xu
- College of Bioengineering/Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen, People's Republic of China.
| | - Mingfang Tao
- Hubei Key Laboratory of Nutritional Quality and Safety of Agro-products, Institute of Agricultural Quality Standards and Detection Technology, Hubei Academy of Agricultural Sciences, Wuhan, People's Republic of China.
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He L, Wu Z, Wang X, Zhao C, Cheng D, Du C, Wang H, Gao Y, Zhang R, Han J, Xu J. A novel maize F-bZIP member, ZmbZIP76, functions as a positive regulator in ABA-mediated abiotic stress tolerance by binding to ACGT-containing elements. Plant Sci 2024; 341:111952. [PMID: 38072329 DOI: 10.1016/j.plantsci.2023.111952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/31/2023] [Accepted: 12/06/2023] [Indexed: 02/10/2024]
Abstract
The group F-bZIP transcription factors (TFs) in Arabidopsis are involved in nutrient deficiency or salt stress responses. Nevertheless, our learning about the functions of group F-bZIP genes in maize remains limited. Here, we cloned a new F-bZIP gene (ZmbZIP76) from maize inbred line He344. The expression of ZmbZIP76 in maize was dramatically induced by high salt, osmotic stress and abscisic acid. Accordingly, overexpression of ZmbZIP76 increased tolerance of transgenic plants to salt and osmotic stress. In addition, ZmbZIP76 functions as a nuclear transcription factor and upregulates the expression of a range of abiotic stress-responsive genes by binding to the ACGT-containing elements, leading to enhanced reactive oxygen species (ROS) scavenging capability, increased abscisic acid level, proline content, and ratio of K+/Na+, reduced water loss rate, and membrane damage. These physiological changes caused by ZmbZIP76 ultimately enhanced tolerance of transgenic plants to salt and osmotic stress.
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Affiliation(s)
- Lin He
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Zixuan Wu
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Xueheyuan Wang
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Changjiang Zhao
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Dianjun Cheng
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Chuhuai Du
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Haoyu Wang
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Yuan Gao
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Ruijia Zhang
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina
| | - Jienan Han
- Institute of Crop Science, Chinese Academy of Agricultural Science, No. 12 Zhongguancun South Street, Haidian District, Beijing 100081, PR China.
| | - Jingyu Xu
- Key Laboratory of Low Carbon Green Agriculture in Northeast Plain, Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, PRChina.
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He Q, Zheng Y, Yan K, Tang J, Yang F, Tian Y, Yang L, Dou B, Chen Y, Gu J, Chen H, Yuan F, Bei W. The cAMP receptor protein gene contributes to growth, stress resistance, and colonization of Actinobacillus pleuropneumoniae. Vet Microbiol 2024; 290:110006. [PMID: 38308931 DOI: 10.1016/j.vetmic.2024.110006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 02/05/2024]
Abstract
Porcine infectious pleuropneumonia (PCP) is a severe disease of porcine caused by Actinobacillus pleuropneumoniae (APP). The spread of PCP remains a threat to the porcine farms and has been known to cause severe economic losses. The cAMP receptor protein (CRP) serves as a pivotal player in helping bacteria adapt to shifts in their environment, particularly when facing the challenges posed by bacterial infections. In this study, we investigated the role of CRP in APP. Our results revealed that crp mutant (Δcrp) strains were more sensitive to acidic and osmotic stress resistance and had lower biofilm formation ability than wild-type (WT) strains. Furthermore, the Δcrp strains showed deficiencies in anti-phagocytosis, adhesion, and invasion upon interaction with host cells. Mice infected with the Δcrp strains demonstrated reduced bacterial loads in their lungs compared to those infected with the WT strains. This study reveals the pivotal role of crp gene expression in regulating pleuropneumonia growth, stress resistance, iron utilization, biofilm formation, phagocytosis, adhesion, invasion and colonization. Our discoveries offer novel perspectives on understanding the development and progression of APP infections.
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Affiliation(s)
- Qiyun He
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Yaxuan Zheng
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Kang Yan
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Jia Tang
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Fengming Yang
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Yanhong Tian
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Lijun Yang
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Beibei Dou
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Yunpeng Chen
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Jun Gu
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Huanchun Chen
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China
| | - Fangyan Yuan
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Weicheng Bei
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine,Huazhong Agricultural University, Wuhan, China; The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan, China.
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Li T, Zheng PH, Zhang XX, Zhang ZL, Li JT, Li JJ, Xu JR, Wang DM, Xian JA, Guo H, Lu YP. Effects of dietary astaxanthin on growth performance, muscle composition, non-specific immunity, gene expression, and ammonia resistance of juvenile ivory shell (Babylonia areolate). Fish Shellfish Immunol 2024; 145:109363. [PMID: 38185392 DOI: 10.1016/j.fsi.2024.109363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/02/2024] [Accepted: 01/04/2024] [Indexed: 01/09/2024]
Abstract
Astaxanthin is one of the important immunopotentators in aquaculture. However, little is known about the physiological changes and stress resistance effects of astaxanthin in marine gastropods. In this study, the effects of different astaxanthin concentrations (0, 25, 50, 75, and 100 mg/kg) on the growth, muscle composition, immune function, and resistance to ammonia stress in Babylonia areolata were investigated after three months of rearing. With the increase in astaxanthin content, the weight gain rate (WGR), specific growth rate (SGR), and survival rate (SR) of B. areolata showed an increasing trend. The 75-100 mg/kg group was significantly higher than the control group (0 mg/kg). There was no significant difference in the flesh shell ratio (FSR), viscerosomatic index (VSI), and soft tissue index (STI) of the experimental groups. Astaxanthin (75 mg/kg) significantly increased muscle crude protein content and increased hepatopancreas alkaline phosphatase (AKP), superoxide dismutase (SOD), and catalase (CAT) activity. Astaxanthin (75-100 mg/kg) significantly increased the total antioxidant capacity (T-AOC) and acid phosphatase (ACP) of the hepatopancreas and decreased the malondialdehyde (MDA) content of B. areolata. Astaxanthin significantly induced the expression levels of functional genes, such as SOD, Cu/ZnSOD, ferritin, ACP, and CYC in hepatopancreas and increased the survival rate of B. areolata under ammonia stress. The addition of 75-100 mg/kg astaxanthin to the feed improved the growth performance, muscle composition, immune function, and resistance to ammonia stress of B. areolata.
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Affiliation(s)
- Teng Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China; Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, College of Fisheries, Guangdong Ocean University, Zhanjiang, 524025, People's Republic of China
| | - Pei-Hua Zheng
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Xiu-Xia Zhang
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Ze-Long Zhang
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Jun-Tao Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Jia-Jun Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Jia-Rui Xu
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Dong-Mei Wang
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Jian-An Xian
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China; Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, College of Fisheries, Guangdong Ocean University, Zhanjiang, 524025, People's Republic of China.
| | - Hui Guo
- Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, College of Fisheries, Guangdong Ocean University, Zhanjiang, 524025, People's Republic of China.
| | - Yao-Peng Lu
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China.
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Zhao L, Zhou X, Kang Z, Peralta-Videa JR, Zhu YG. Nano-enabled seed treatment: A new and sustainable approach to engineering climate-resilient crops. Sci Total Environ 2024; 910:168640. [PMID: 37989394 DOI: 10.1016/j.scitotenv.2023.168640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 11/23/2023]
Abstract
Under a changing climate, keeping the food supply steady for an ever-increasing population will require crop plants adapted to environmental fluctuations. Genetic engineering and genome-editing approaches have been used for developing climate-resilient crops. However, genetically modified crops have yet to be widely accepted, especially for small-scale farmers in low-income countries and some societies. Nano-priming (seed exposure to nanoparticles, NPs) has appeared as an alternative to the abovementioned techniques. This technique improves seed germination speed, promotes seedlings' vigor, and enhances plant tolerance to adverse conditions such as drought, salinity, temperature, and flooding, which may occur under extreme weather conditions. Moreover, nano-enabled seed treatment can increase the disease resistance of crops by boosting immunity, which will reduce the use of pesticides. This unsophisticated, farmer-available, cost-effective, and environment-friendly seed treatment approach may help crop plants fight climate change challenges. This review discusses the previous information about nano-enabled seed treatment for enhancing plant tolerance to abiotic stresses and increasing disease resistance. Current knowledge about the mechanisms underlying nanomaterial-seed interactions is discussed. To conclude, the review includes research questions to address before this technique reaches its full potential.
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Affiliation(s)
- Lijuan Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China.
| | - Xiaoding Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Zhao Kang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Jose R Peralta-Videa
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Yong-Guan Zhu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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Zoheir AE, Stolle C, Rabe KS. Microfluidics for adaptation of microorganisms to stress: design and application. Appl Microbiol Biotechnol 2024; 108:162. [PMID: 38252163 PMCID: PMC10803453 DOI: 10.1007/s00253-024-13011-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/22/2023] [Accepted: 01/11/2024] [Indexed: 01/23/2024]
Abstract
Microfluidic systems have fundamentally transformed the realm of adaptive laboratory evolution (ALE) for microorganisms by offering unparalleled control over environmental conditions, thereby optimizing mutant generation and desired trait selection. This review summarizes the substantial influence of microfluidic technologies and their design paradigms on microbial adaptation, with a primary focus on leveraging spatial stressor concentration gradients to enhance microbial growth in challenging environments. Specifically, microfluidic platforms tailored for scaled-down ALE processes not only enable highly autonomous and precise setups but also incorporate novel functionalities. These capabilities encompass fostering the growth of biofilms alongside planktonic cells, refining selection gradient profiles, and simulating adaptation dynamics akin to natural habitats. The integration of these aspects enables shaping phenotypes under pressure, presenting an unprecedented avenue for developing robust, stress-resistant strains, a feat not easily attainable using conventional ALE setups. The versatility of these microfluidic systems is not limited to fundamental research but also offers promising applications in various areas of stress resistance. As microfluidic technologies continue to evolve and merge with cutting-edge methodologies, they possess the potential not only to redefine the landscape of microbial adaptation studies but also to expedite advancements in various biotechnological areas. KEY POINTS: • Microfluidics enable precise microbial adaptation in controlled gradients. • Microfluidic ALE offers insights into stress resistance and distinguishes between resistance and persistence. • Integration of adaptation-influencing factors in microfluidic setups facilitates efficient generation of stress-resistant strains.
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Affiliation(s)
- Ahmed E Zoheir
- Department of Genetics and Cytology, Biotechnology Research Institute, National Research Centre (NRC), 33 El Buhouth St., Dokki, Cairo, 12622, Egypt
| | - Camilla Stolle
- Institute for Biological Interfaces 1 (IBG-1), Biomolecular Micro- and Nanostructures, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Kersten S Rabe
- Institute for Biological Interfaces 1 (IBG-1), Biomolecular Micro- and Nanostructures, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
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Gorczyca M, Białas W, Nicaud JM, Celińska E. 'Mother(Nature) knows best' - hijacking nature-designed transcriptional programs for enhancing stress resistance and protein production in Yarrowia lipolytica; presentation of YaliFunTome database. Microb Cell Fact 2024; 23:26. [PMID: 38238843 PMCID: PMC10797999 DOI: 10.1186/s12934-023-02285-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/21/2023] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND In the era of rationally designed synthetic biology, heterologous metabolites production, and other counter-nature engineering of cellular metabolism, we took a step back and recalled that 'Mother(-Nature) knows best'. While still aiming at synthetic, non-natural outcomes of generating an 'over-production phenotype' we dug into the pre-designed transcriptional programs evolved in our host organism-Yarrowia lipolytica, hoping that some of these fine-tuned orchestrated programs could be hijacked and used. Having an interest in the practical outcomes of the research, we targeted industrially-relevant functionalities-stress resistance and enhanced synthesis of proteins, and gauged them over extensive experimental design's completion. RESULTS Technically, the problem was addressed by screening a broad library of over 120 Y. lipolytica strains under 72 combinations of variables through a carefully pre-optimized high-throughput cultivation protocol, which enabled actual phenotype development. The abundance of the transcription program elicitors-transcription factors (TFs), was secured by their overexpression, while challenging the strains with the multitude of conditions was inflicted to impact their activation stratus. The data were subjected to mathematical modeling to increase their informativeness. The amount of the gathered data prompted us to present them in the form of a searchable catalog - the YaliFunTome database ( https://sparrow.up.poznan.pl/tsdatabase/ )-to facilitate the withdrawal of biological sense from numerical data. We succeeded in the identification of TFs that act as omni-boosters of protein synthesis, enhance resistance to limited oxygen availability, and improve protein synthesis capacity under inorganic nitrogen provision. CONCLUSIONS All potential users are invited to browse YaliFunTome in the search for homologous TFs and the TF-driven phenotypes of interest.
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Affiliation(s)
- Maria Gorczyca
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, 60-637, Poznań, Poland
| | - Wojciech Białas
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, 60-637, Poznań, Poland
| | - Jean-Marc Nicaud
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Ewelina Celińska
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, 60-637, Poznań, Poland.
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Chen L, Xie YL, Wu XH, Wu LL, Yang J, Gao Y, Mi Y, Yang F. Bioactivity and genome analysis of Bacillus amyloliquefaciens GL18 isolated from the rhizosphere of Kobresia myosuroides in an alpine meadow. Antonie Van Leeuwenhoek 2024; 117:16. [PMID: 38189906 DOI: 10.1007/s10482-023-01917-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/04/2023] [Indexed: 01/09/2024]
Abstract
The unique eco-environment of the Qinghai-Tibet Plateau breeds abundant microbial resources. In this research, Bacillus amyloliquefaciens GL18, isolated from the rhizosphere of Kobresia myosuroides from an alpine meadow, and the antagonistic activity, bacteriostatic hydrolase activity, and low temperature, salt, and drought resistance of it were determined and analysed. The seedlings of Avena sativa were root-irrigated using bacteria suspensions (cell concentration 1 × 107 cfu/mL) of GL18, and the growth-promoting effect of GL18 on it was determined under cold, salt and drought stress, respectively. The whole genome of GL18 was sequenced, and its functional genes were analysed. GL18 presented significant antagonistic activity to Fusarium graminearum, Fusarium acuminatum, Fusarium oxysporum and Aspergillus niger (inhibition zone diameter > 17 mm). Transparent zones formed on four hydrolase detection media, indicating that GL18 secreted cellulase, protease, pectinase and β-1,3-glucanase. GL18 tolerated conditions of 10 °C, 11% NaCl and 15% PEG-6000, presenting cold, salt and drought resistance. GL18 improved the cold, salt and drought tolerance of A. sativa and it showed significant growth effects under different stress. The total length of the GL18 genome was 3,915,550 bp, and the number of coding DNA sequence was 3726. Compared with the clusters of orthologous groups of proteins, gene ontology and kyoto encyclopedia of genes and genomes databases, 3088, 2869 and 2357 functional genes were annotated, respectively. GL18 contained gene clusters related to antibacterial substances, functional genes related to the synthesis of plant growth-promoting substances, and encoding genes related to stress resistance. This study identified an excellent Bacillus strain and provided a theoretical basis for improving stress resistance and promoting the growth of herbages under abiotic stress.
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Affiliation(s)
- L Chen
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - Y L Xie
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China.
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China.
- Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai University, Xining, 810016, China.
| | - X H Wu
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - L L Wu
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - J Yang
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - Y Gao
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - Y Mi
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
| | - F Yang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
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10
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Gao M, Bai L, Xiao L, Peng H, Chen Q, Qiu W, Song Z. Micro (nano)plastics and phthalate esters drive endophytic bacteria alteration and inhibit wheat root growth. Sci Total Environ 2024; 906:167734. [PMID: 37827310 DOI: 10.1016/j.scitotenv.2023.167734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/11/2023] [Accepted: 10/08/2023] [Indexed: 10/14/2023]
Abstract
Endophytes play an important role in plant growth and stress tolerance, but limited information is available on the complex effects of micro (nano)plastics and phthalate esters (PAEs) on endophytes in terrestrial plants. To better elucidate the ecological response of endophytic bacteria on exogenous pollutants, a hydroponic experiment was conducted to examine the combined impact of polystyrene (PS) and PAEs on endophyte community structure, diversity, and wheat growth. The findings revealed that wheat roots were capable of absorbing and accumulating PS nanoparticles (PS-NPs, 0.1 μm), whereas PS microparticles (PS-MPs, 1 and 10 μm) merely adhered to the root surface. The addition of PAEs resulted in a stronger accumulation of fluorescent signal from PS-NPs in the roots. The dibutyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) were identified in wheat roots, and they could be metabolized to form minobutyl phthalate and phthalic acid, and mono-(2-ethylhexyl) phthalate, respectively. Compared to single PAEs, the concentration of PAEs and their metabolites in the roots treated with PS-NPs showed a great increase, while they exhibited a significant decline in the presence of PS-MPs. Principal coordinate analysis and permutational multivariate analysis of variance demonstrated that PS size were the major factor that induced oxidative damage, and altered the endogenous homeostasis of wheat roots. The increase in PS size positively promoted the relative abundance of dominant endophytes. Specifically, Proteobacteria. Proteobacteria were the most important in the symbiosis survival, which had a great impact on the microbial community and diversity. Therefore, PS and PAEs could affect the endophytes directly and indirectly. Structural equation modeling further implied that these endophytic bacteria, along with antioxidant enzymes such as superoxide dismutase which were regulated by non-enzymatic mechanisms, promoted root biomass increase. These results indicated a synergistic resistance mechanism between antioxidant enzymes and endophytic bacteria in response to environmental stress.
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Affiliation(s)
- Minling Gao
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Linsen Bai
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Ling Xiao
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Hongchang Peng
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Qiaoting Chen
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Weiwen Qiu
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 4704, Christchurch 8140, New Zealand
| | - Zhengguo Song
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China.
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11
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Chen R, Yu J, Yu L, Xiao L, Xiao Y, Chen J, Gao S, Chen X, Li Q, Zhang H, Chen W, Zhang L. The ERF transcription factor LTF1 activates DIR1 to control stereoselective synthesis of antiviral lignans and stress defense in Isatis indigotica roots. Acta Pharm Sin B 2024; 14:405-420. [PMID: 38261810 PMCID: PMC10792966 DOI: 10.1016/j.apsb.2023.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/13/2023] [Accepted: 08/07/2023] [Indexed: 01/25/2024] Open
Abstract
Lignans are a powerful weapon for plants to resist stresses and have diverse bioactive functions to protect human health. Elucidating the mechanisms of stereoselective biosynthesis and response to stresses of lignans is important for the guidance of plant improvement. Here, we identified the complete pathway to stereoselectively synthesize antiviral (-)-lariciresinol glucosides in Isatis indigotica roots, which consists of three-step sequential stereoselective enzymes DIR1/2, PLR, and UGT71B2. DIR1 was further identified as the key gene in respoJanuary 2024nse to stresses and was able to trigger stress defenses by mediating the elevation in lignan content. Mechanistically, the phytohormone-responsive ERF transcription factor LTF1 colocalized with DIR1 in the cell periphery of the vascular regions in mature roots and helped resist biotic and abiotic stresses by directly regulating the expression of DIR1. These systematic results suggest that DIR1 as the first common step of the lignan pathway cooperates with PLR and UGT71B2 to stereoselectively synthesize (-)-lariciresinol derived antiviral lignans in I. indigotica roots and is also a part of the LTF1-mediated regulatory network to resist stresses. In conclusion, the LTF1-DIR1 module is an ideal engineering target to improve plant Defenses while increasing the content of valuable lignans in plants.
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Affiliation(s)
- Ruibing Chen
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
- State Key Laboratory of Dao-di Herbs, Beijing 100700, China
| | - Jian Yu
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
| | - Luyao Yu
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
| | - Liang Xiao
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
| | - Ying Xiao
- Research and Development Center of Chinese Medicine Resources and Biotechnology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Junfeng Chen
- Research and Development Center of Chinese Medicine Resources and Biotechnology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Shouhong Gao
- Department of Pharmacy, Shanghai Changzheng Hospital, Naval Medical University, Shanghai 200003, China
| | - Xianghui Chen
- School of Medicine, Shanghai University, Shanghai 200433, China
| | - Qing Li
- Department of Pharmacy, Shanghai Changzheng Hospital, Naval Medical University, Shanghai 200003, China
| | - Henan Zhang
- Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, National Engineering Research Center of Edible Fungi, Key Laboratory of Edible Fungi Resources and Utilization (South), Ministry of Agriculture, Shanghai 201403, China
| | - Wansheng Chen
- Research and Development Center of Chinese Medicine Resources and Biotechnology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Department of Pharmacy, Shanghai Changzheng Hospital, Naval Medical University, Shanghai 200003, China
| | - Lei Zhang
- Department of Pharmaceutical Botany, School of Pharmacy, Naval Medical University, Shanghai 200433, China
- College of Life Sciences and Medicine, Key Laboratory of Plant Secondary Metabolism and Regulation of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
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Zhu H, Ahmad S, Duan Z, Shi J, Tang X, Dong Q, Xi C, Ge L, Wu T, Tan Y. The Jinggangmycin-induced Mthl2 gene regulates the development and stress resistance in Nilaparvata lugens Stål (Hemiptera: Delphacidae). Pestic Biochem Physiol 2023; 196:105630. [PMID: 37945234 DOI: 10.1016/j.pestbp.2023.105630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 11/12/2023]
Abstract
Methuselah (Mth) belongs to the GPCR family B, which regulates various biological processes and stress responses. The previous transcriptome data showed jinggangmycin (JGM)-induced Mthl2 expression. However, its detailed functional role remained unclear in brown planthopper, Nilaparvata lugens Stål. In adult N. lugens, the Mthl2 gene showed dominant expressions, notably in ovaries and fat body tissues. The 3rd instar nymphs treated with JGM increased starvation, oxidative stress, and high temperature (34 °C) tolerance of the adults. On the contrary, under dsMthl2 treatment, completely opposite phenotypes were observed. The lipid synthesis genes (DGAT1and PNPLA3) of both females and males treated with JGM in the nymphal stage were observed with high expressions, while the lipolysis of the Lipase 3 gene was observed with low expressions. The JGM increased triglyceride (TG) content, fat body droplet size, and the number of fat body droplets. The same treatment also increased the Glutathione S-transferase (GST), catalase (CAT), and superoxide dismutase (SOD) activities. An increase in the heat shock protein (HSP70 and HSP90) expression levels was also observed under JGM treatment but not dsMthl2. The current study demonstrated the influential role of the Mthl genes, particularly the Mthl2 gene, in modulating the growth and development and stress-responsiveness in N. lugens. Thus, providing a platform for future applied research programs controlling N. lugens population in rice fields.
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Affiliation(s)
- Haowen Zhu
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Sheraz Ahmad
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Zhirou Duan
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Junting Shi
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Xingyu Tang
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Qiaoqiao Dong
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Chuanyuan Xi
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Linquan Ge
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China.
| | - Tao Wu
- College of Horticulture and Landscape Architecture, Yangzhou University, 225009 Yangzhou, PR China.
| | - Yongan Tan
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
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13
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Chen C, Guo Q, He Q, Tian Z, Hao W, Shan X, Lu J, Barkla BJ, Ma C, Si H. Comparative transcriptomic analysis of wheat cultivars differing in their resistance to Fusarium head blight infection during grain-filling stages reveals unique defense mechanisms at play. BMC Plant Biol 2023; 23:433. [PMID: 37715120 PMCID: PMC10504723 DOI: 10.1186/s12870-023-04451-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 09/09/2023] [Indexed: 09/17/2023]
Abstract
Fusarium head blight (FHB) is a devastating fungal disease that poses a significant threat to wheat production, causing substantial yield losses. Understanding the molecular mechanisms of wheat resistance to FHB is crucial for developing effective disease management strategies. This study aimed to investigate the mechanisms of FHB resistance and the patterns of toxin accumulation in three wheat cultivars, Annong8455, Annong1589, and Sumai3, with different levels of resistance, ranging from low to high respectively, under natural field conditions. Samples were taken at three different grain-filling stages (5, 10, and 15 DPA) for gene expression analysis and phenotypic observation. Results found that toxin concentration was inversely correlated with varietal resistance but not correlated with disease phenotypes, indicating that toxin analysis is a more accurate measure of disease status in wheat ears and grains. Transcriptomic data showed that Sumai3 exhibited a stronger immune response during all stages of grain filling by upregulating genes involved in the active destruction of pathogens and removal of toxins. In contrast, Annong1589 showed a passive prevention of the spread of toxins into cells by the upregulation of genes involved in tyramine biosynthesis at the early stage (5 DPA), which may be involved in cell wall strengthening. Our study demonstrates the complexity of FHB resistance in wheat, with cultivars exhibiting unique and overlapping defense mechanisms, and highlights the importance of considering the temporal and spatial dynamics of gene expression in breeding programs for developing more resistant wheat cultivars.
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Affiliation(s)
- Can Chen
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Qi Guo
- Faculty of Science and Engineering, Southern Cross University, Lismore, 2480 NSW, Australia
| | - Qifang He
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Zhuangbo Tian
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Weihao Hao
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Xinyu Shan
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Jie Lu
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Bronwyn J Barkla
- Faculty of Science and Engineering, Southern Cross University, Lismore, 2480 NSW, Australia
| | - Chuanxi Ma
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China
| | - Hongqi Si
- Key Laboratory of Wheat Biology and Genetic Improvement On Southern Yellow and Huai River Valley, Ministry of Agriculture and Rural Affairs, College of Agronomy, Anhui Agricultural University, Hefei, 230036, China.
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14
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Guillén S, Nadal L, Halaihel N, Mañas P, Cebrián G. Genotypic and phenotypic characterization of a Salmonella Typhimurium strain resistant to pulsed electric fields. Food Microbiol 2023; 113:104285. [PMID: 37098417 DOI: 10.1016/j.fm.2023.104285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 03/29/2023] [Accepted: 04/11/2023] [Indexed: 04/27/2023]
Abstract
Pulsed Electric Fields (PEF) technology is regarded as one of the most interesting alternatives to current food preservation methods, due to its capability to inactivate vegetative microorganisms while leaving the product's organoleptic and nutritional properties mostly unchanged. However, many aspects regarding the mechanisms of bacterial inactivation by PEF are still not fully understood. The aim of this study was to obtain further insight into the mechanisms responsible for the increased resistance to PEF of a Salmonella Typhimurium SL1344 variant (SL1344-RS, Sagarzazu et al., 2013), and to quantify the impact that the acquisition of PEF resistance has on other aspects of S. enterica physiology, such as growth fitness, biofilm formation ability, virulence and antibiotic resistance. WGS, RNAseq and qRT-PCR assays indicated that the increased PEF resistance of the SL1344-RS variant is due to a higher RpoS activity caused by a mutation in the hnr gene. This increased RpoS activity also results in higher resistance to multiple stresses (acidic, osmotic, oxidative, ethanol and UV-C, but not to heat and HHP), decreased growth rate in M9-Gluconate (but not in TSB-YE or LB-DPY), increased ability to adhere to Caco-2 cells (but no significant change in invasiveness) and enhanced antibiotic resistance (to six out of eight agents). This study significantly contributes to the understanding of the mechanisms of the development of stress resistance in Salmonellae and underscores the crucial role played by RpoS in this process. Further studies are needed to determine whether this PEF-resistant variant would represent a higher, equal or lower associated hazard than the parental strain.
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Affiliation(s)
- S Guillén
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón- IA2, Universidad de Zaragoza-CITA, 50013, Zaragoza, Spain
| | - L Nadal
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón- IA2, Universidad de Zaragoza-CITA, 50013, Zaragoza, Spain
| | - N Halaihel
- Departamento I+D+i, Alquizvetek S.L, Zaragoza, 50013, Zaragoza, Spain
| | - P Mañas
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón- IA2, Universidad de Zaragoza-CITA, 50013, Zaragoza, Spain
| | - G Cebrián
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón- IA2, Universidad de Zaragoza-CITA, 50013, Zaragoza, Spain.
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15
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Lin YC, Zhang M, Chang YJ, Kuo TH. Comparisons of lifespan and stress resistance between sexes in Drosophila melanogaster. Heliyon 2023; 9:e18178. [PMID: 37576293 PMCID: PMC10415617 DOI: 10.1016/j.heliyon.2023.e18178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
Animals exhibit different extents of sexual dimorphism in a variety of phenotypes. Sex differences in longevity, one of the most complex life history traits, have also been reported. Although lifespan regulation has been studied extensively in the fruit fly, Drosophila melanogaster, the sex differences in lifespan have not been consistent in previous studies. To explore this issue, we revisited this question by examining the lifespan and stress resistance of both sexes among 15 inbred strains. We first found positive correlations between males and females from the same strain in terms of lifespan and resistance to starvation and desiccation stress. Although the lifespan difference between male and female flies varied greatly depending on the strain, males across all strains collectively had a longer lifespan. In contrast, females showed better resistance to starvation and desiccation stress. We also observed greater variation in lifespan and resistance to starvation and desiccation stress in females. Unexpectedly, there was no notable correlation observed between lifespan and the three types of stress resistance in either males or females. Overall, our study provides new data regarding sexual dimorphism in fly lifespan and stress resistance; this information may promote the investigation of mechanisms underlying longevity in future research.
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Affiliation(s)
- Yu-Chiao Lin
- Institute of Systems Neuroscience, National Tsing Hua University, Hsinchu, Taiwan
| | - MingYang Zhang
- Institute of Systems Neuroscience, National Tsing Hua University, Hsinchu, Taiwan
| | | | - Tsung-Han Kuo
- Institute of Systems Neuroscience, National Tsing Hua University, Hsinchu, Taiwan
- Department of Life Science, National Tsing Hua University, Hsinchu 300, Taiwan
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16
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Jia Z, Zhou J, Han J, Liu D, Lv R. Proteomics-based analysis of the stress response of Bacillus cereus spores under ultrasound and electrolyzed water treatment. Ultrason Sonochem 2023; 98:106523. [PMID: 37453258 PMCID: PMC10368921 DOI: 10.1016/j.ultsonch.2023.106523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 06/17/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
Ultrasound is a green nonthermal technology with promising applications in microbial inactivation. Electrolyzed water has been investigated and found to have a synergistic inactivation effect of ultrasound on spores. This study used a data-independent-acquisition method to analyze the stress response of Bacillus cereus spores following ultrasound combined with electrolyzed water treatment. We identified 197 differentially expressed proteins under ultrasound combined with an electrolyzed water treatment for which the ratio in the metabolic pathway was the highest. Spores downregulated key proteins in energy metabolic and transportation pathways, in particular in phosphotransferase systems and ATP synthase under ultrasound, electrolyzed water, and combined stress. The results of this study revealed that the key proteins in intracellular metabolism decreased after ultrasound treatment, and the expression of small acid-soluble spore protein and cell wall biosynthesis protein increased. Meanwhile, DNA integration, recombination, and inversion protein and small acid-soluble spore protein were upregulated after electrolyzed water treatment. In general, the spores exhibited stress resistance under external stress. The inactivation of spores by further stress was reduced, which we called "cross-protection."
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Affiliation(s)
- Zixuan Jia
- Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | | | - Jingzeng Han
- Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Donghong Liu
- Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Ruiling Lv
- Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
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17
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Osorio-Paz I, Valle-Jiménez X, Brunauer R, Alavez S. Vanillic Acid Improves Stress Resistance and Substantially Extends Life Span in Caenorhabditis elegans. J Gerontol A Biol Sci Med Sci 2023; 78:1100-1107. [PMID: 36941756 DOI: 10.1093/gerona/glad086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Indexed: 03/23/2023] Open
Abstract
Aging is the root cause of several pathologies like neurological and cardiovascular diseases. Identifying compounds that improve health span and extend life span, called geroprotectors, could be crucial to preventing or at least delaying the onset of age-related diseases. In this regard, the nematode Caenorhabditis elegans (C. elegans) is emerging as an easy, efficient, low-cost model system to screen natural products and identify novel geroprotectors. Phenolic acids can be found in a wide range of natural products that are part of the human diet. Vanillic acid (VA) is a phenolic acid that has previously been attributed with antioxidant, anti-inflammatory, and neuroprotective features. To determine whether these beneficial health effects amount to an extension of health span and life span, in this work, we thoroughly explore the effect of VA on C. elegans stress resistance and life span. We found that VA increases thermotolerance (19.4%), reduces protein aggregation (between 30% and 40%), improves motility, and extends life span by almost 50%, an extent hardly ever achieved with a natural compound. The increased thermotolerance induced by VA is independent of the insulin/insulin-like growth factor-1 signaling pathway but requires heat shock factor-1 and is associated with increased heat shock protein-4 (HSP-4) and hsp-16.2 expression. These results provide new insight into understanding the therapeutical properties of VA and warrant further investigation of VA as a novel geroprotector.
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Affiliation(s)
- Ixchel Osorio-Paz
- Health Sciences Department, Metropolitan Autonomous University, Campus Lerma, State of México, México
| | - Xareni Valle-Jiménez
- Health Sciences Department, Metropolitan Autonomous University, Campus Lerma, State of México, México
| | - Regina Brunauer
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Silvestre Alavez
- Health Sciences Department, Metropolitan Autonomous University, Campus Lerma, State of México, México
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18
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Soo SK, Rudich ZD, Ko B, Moldakozhayev A, AlOkda A, Van Raamsdonk JM. Biological resilience and aging: Activation of stress response pathways contributes to lifespan extension. Ageing Res Rev 2023; 88:101941. [PMID: 37127095 DOI: 10.1016/j.arr.2023.101941] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/06/2023] [Accepted: 04/28/2023] [Indexed: 05/03/2023]
Abstract
While aging was traditionally viewed as a stochastic process of damage accumulation, it is now clear that aging is strongly influenced by genetics. The identification and characterization of long-lived genetic mutants in model organisms has provided insights into the genetic pathways and molecular mechanisms involved in extending longevity. Long-lived genetic mutants exhibit activation of multiple stress response pathways leading to enhanced resistance to exogenous stressors. As a result, lifespan exhibits a significant, positive correlation with resistance to stress. Disruption of stress response pathways inhibits lifespan extension in multiple long-lived mutants representing different pathways of lifespan extension and can also reduce the lifespan of wild-type animals. Combined, this suggests that activation of stress response pathways is a key mechanism by which long-lived mutants achieve their extended longevity and that many of these pathways are also required for normal lifespan. These results highlight an important role for stress response pathways in determining the lifespan of an organism.
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Affiliation(s)
- Sonja K Soo
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Zenith D Rudich
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Bokang Ko
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Alibek Moldakozhayev
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Abdelrahman AlOkda
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jeremy M Van Raamsdonk
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Metabolic Disorders and Complications Program, and Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, Quebec, Canada.
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Jia SL, Zhang M, Liu GL, Chi ZM, Chi Z. Novel chromosomes and genomes provide new insights into evolution and adaptation of the whole genome duplicated yeast-like fungus TN3-1 isolated from natural honey. Funct Integr Genomics 2023; 23:206. [PMID: 37335429 DOI: 10.1007/s10142-023-01127-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/21/2023]
Abstract
Aureobasidium melanogenum TN3-1 strain and A. melanogenum P16 strain were isolated from the natural honey and the mangrove ecosystem, respectively. The former can produce much higher pullulan from high concentration of glucose than the latter. In order to know what happened to their genomes, the PacBio sequencing and Hi-C technologies were used to create the first high-quality chromosome-level reference genome assembly of A. melanogenum TN3-1 (51.61 Mb) and A. melanogenum P16 (25.82 Mb) with the contig N50 of 2.19 Mb and 2.26 Mb, respectively. Based on the Hi-C results, a total of 93.33% contigs in the TN3-1 strain and 92.31% contigs in the P16 strain were anchored onto 24 and 12 haploid chromosomes, respectively. The genomes of the TN3-1 strain had two subgenomes A and B. Synteny analysis showed that the genomic contents of the two subgenomes were asymmetric with many structural variations. Intriguingly, the TN3-1 strain was revealed as a recent hybrid/fusion between the ancestor of A. melanogenum CBS105.22/CBS110374 and the ancestor of another unidentified strain of A. melanogenum similar to P16 strain. We estimated that the two ancient progenitors diverged around 18.38 Mya and merged around 10.66-9.98 Mya. It was found that in the TN3-1 strain, telomeres of each chromosome contained high level of long interspersed nuclear elements (LINEs), but had low level of the telomerase encoding gene. Meanwhile, there were high level of transposable elements (TEs) inserted in the chromosomes of the TN3-1 strain. In addition, the positively selected genes of the TN3-1 strain were mainly enriched in the metabolic processes related to harsh environmental adaptability. Most of the stress-related genes were found to be related to the adjacent LTRs, and the glucose derepression was caused by the mutation of the Glc7-2 in the Snf-Mig1 system. All of these could contribute to its genetic instability, genome evolution, high stress resistance, and high pullulan production from glucose.
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Affiliation(s)
- Shu-Lei Jia
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
| | - Mei Zhang
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
| | - Guang-Lei Liu
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266003, China
| | - Zhen-Ming Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266003, China.
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266003, China
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20
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Liu J, Wu S, Feng L, Wu Y, Zhu J. Extracellular matrix affects mature biofilm and stress resistance of psychrotrophic spoilage Pseudomonas at cold temperature. Food Microbiol 2023; 112:104214. [PMID: 36906314 DOI: 10.1016/j.fm.2023.104214] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/08/2023]
Abstract
Psychrotrophic Pseudomonas as the dominant spoilage bacteria, have biofilm forming ability, increasing persistence and contamination in the chilled food. Biofilm formation of spoilage Pseudomonas at cold temperature was documented, however, role of extracellular matrix in mature biofilm and stress resistance of psychrotrophic Pseudomonas are much less abundant. The aim of this study was to investigate the biofilm forming characteristics of three spoilers P. fluorescens PF07, P. lundensis PL28, and P. psychrophile PP26 at 25 °C, 15 °C and 4 °C, and to explore their stress resistance to chemical and thermal treatments of mature biofilms. The results showed that biofilm biomass of three Pseudomonas at 4 °C was significantly higher than that at 15 °C and 25 °C. The secretion of extracellular polymeric substances (EPS) greatly increased in those Pseudomonas under low temperature, of which extracellular protein constituted about 71.03%-77.44%. Compared to 25 °C, the mature biofilms were observed to more aggregation and thicker spatial structure at 4 °C ranging from 42.7 to 54.6 μm, in contrast to 25.0-29.8 μm at 25 °C, especially strain PF07. These Pseudomonas biofilms switched into moderate hydrophobicity, and their swarming and swimming were significantly inhibited at low temperature. Furthermore, the resistance to NaClO and heating at 65 °C apparently enhanced for mature biofilm formed at 4 °C, indicating the difference in EPS matrix production influenced the stress resistance of biofilm. In addition, three strains contained alg and psl operons for exopolysaccharide biosynthesis, and biofilm related genes of algK, pslA, rpoS, and luxR were significantly up-regulated, while flgA gene was down-regulated at 4 °C compared to 25 °C, consistent with the above phenotype changes. Thus, the dramatic increase of mature biofilm and their stress resistance in psychrotrophic Pseudomonas were associated with large secretion and protection of extracellular matrix under low temperature, which provide a theoretical basis for subsequent biofilm control during cold chain.
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Dong J, Jiang W, Gao P, Yang T, Zhang W, Huangfu M, Zhang J, Che D. Comparison of betalain compounds in two Beta vulgaris var. cicla and BvCYP76AD27 function identification in betalain biosynthesis. Plant Physiol Biochem 2023; 199:107711. [PMID: 37116227 DOI: 10.1016/j.plaphy.2023.107711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/26/2023] [Accepted: 04/14/2023] [Indexed: 05/23/2023]
Abstract
Beta vulgaris var. cicla is an edible, ornamental and horticultural plant. However, the difference of components and contents of betalain in beets with different leaf color are not well understood. Here, the stress resistance and metabolites of two B. vulgaris var. cicla cultivars were determined. The differences in stress resistance between red leaf-colored chard (RC) and yellow leaf-colored chard (YC) were positively related to betacyanins (BC) and betaxathins (BX) content in the leaves. Furthermore, a total of 3615 distinct metabolites were identified by UPLC-QTOF-MS in two cultivars, including 70 alkaloids and their derivatives, 249 flavonoids, and 264 terpenoids. There were 17 metabolites attributed to betalain biosynthesis pathway, seven of nine BC were up-regulated, and eight BX showed no significant difference in RC compared with YC. The contents of celosianin II and betanin were the highest BC in RC, at approximately 84.38 and 19.97 times that of YC, respectively. The content of portulacaxanthin II was the highest BX in two beets. Additionally, the BvCYP450 genes were identified based on genome, and the members that might be involved in betalain biosynthesis were screened. BvCYP76AD27, a member of the BvCYP76AD subfamily, had a higher expression level in RC than YC under freezing, drought and shading stress. In yeast Saccharomyces cerevisiae, BvCYP76AD5 and BvCYP76AD27 only hydroxylated tyrosine to L-DOPA, which was transformed into portulacaxanthin II by 4,5-DOPA extradiol dioxygenase. The results contribute to illustrating the molecular mechanism of betalain biosynthesis and provide useful information for further investigation of beet chemistry and sufficient utilization of this species.
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Affiliation(s)
- Jie Dong
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Wan Jiang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Peng Gao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Tao Yang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Wuhua Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Minge Huangfu
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China
| | - Jinzhu Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China.
| | - Daidi Che
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Cold Region Landscape Plants and Applications, Harbin, 150030, China.
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Wang YD, Gong JS, Guan YC, Zhao ZL, Cai YN, Shan XF. OmpR (TCS response regulator) of Aeromonas veronii plays a major role in drug resistance, stress resistance and virulence by regulating biofilm formation. Microb Pathog 2023; 181:106176. [PMID: 37244492 DOI: 10.1016/j.micpath.2023.106176] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/25/2023] [Accepted: 05/25/2023] [Indexed: 05/29/2023]
Abstract
Aeromonas veronii (A. veronii), a highly pathogenic bacteria with a wide range of hosts, widely exists in the environment of humans, animals and aquatic animals, and can cause a variety of diseases. In this study, the receptor regulator ompR in the envZ/ompR of two-component system was selected to construct a mutant strain (Δ ompR) and a complement strain (C-ompR) to explore the regulatory effect of ompR on the biological characteristics and virulence of TH0426. The results showed that the ability of biofilm formation and osmotic stress of TH0426 were significantly reduced (P < 0.001), the resistance to ceftriaxone and neomycin were slightly down-regulate when the ompR gene was deleted. At the same time, animal pathogenicity experiments showed that the virulence of TH0426 was significantly down-regulated (P < 0.001). These results indicated that ompR gene regulates the biofilm formation of TH0426, and regulates some biological characteristics of TH0426, including drug sensitivity, resistance to osmotic stress, and also affects its virulence.
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Affiliation(s)
- Ying-da Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, 130118, China
| | - Jin-Shuo Gong
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, 130118, China
| | - Yong-Chao Guan
- Institute of Comparative Medicine College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Ze-Lin Zhao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, 130118, China
| | - Ya-Nan Cai
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, 130118, China.
| | - Xiao-Feng Shan
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province, 130118, China.
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23
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Zhang M, Yu B, Zhang X, Deng B. Inhibition of nitrogen assimilation promotes carbon-based secondary metabolism in callus of Cyclocarya paliurus. J Plant Physiol 2023; 286:153998. [PMID: 37216742 DOI: 10.1016/j.jplph.2023.153998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/24/2023]
Abstract
The biosynthesis and accumulation of secondary metabolites are critical important to quality formation of medicinal plants, which are usually give way to primary processes and growth. Here, methionine sulfoximine (MSO) was used to inhibit the nitrogen assimilation in callus of Cyclocarya paliurus. The newly assimilated nitrogen characterized by 15N atom percentage excess, and the levels of amino acid and protein were reduced. The other primary processes such as carbohydrate metabolism and lipid metabolism were also repressed. In addition, the expression of the growth-related target of rapamycin (TOR) signaling was repressed, indicating nitrogen assimilation inhibition led to a systematic down-regulated primary metabolisms and resulted in a disruption of growth. In contrast, the biosynthesis of flavonoids and triterpenoids, antioxidase system, and the SnRK2-mediated abscisic acid (ABA) and jasmonic acid (JA) signaling were induced, which can improve plant stress resistance and defense. Nitrogen assimilation inhibition led to the carbon metabolic flux redirection from primary processes to secondary pathways, and facilitated the biosynthesis of flavonoids and triterpenoids in calluses of C. paliurus. Our results provide a comprehensive understanding of metabolic flux redirection between primary and secondary metabolic pathways and a potential means to improve the quality of medicinal plants.
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Affiliation(s)
- Mengjia Zhang
- School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Bangyou Yu
- School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Xiaoyan Zhang
- School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Bo Deng
- School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China.
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24
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Cui X, Zhang B, Li Z, Li C, Li J. Zhuyeqing liquor promotes longevity through enhancing stress resistance via regulation of SKN-1 and HSF-1 transcription factors in Caenorhabditis elegans. Exp Gerontol 2023; 174:112131. [PMID: 36822487 DOI: 10.1016/j.exger.2023.112131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/03/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023]
Abstract
Zhuyeqing liquor (ZYQL) is well-known traditional functional liquor in China that contains twelve crude drugs. Studies have shown that ZYQL has many beneficial effects, but its anti-aging effect has not been reported. Here, we found that ZYQL had excellent antioxidant activity in vitro. In C. elegans, ZYQL could significantly extend the lifespan, and decreased aging related phenotype including accumulation of lipofuscin and the decrease of food intake and motility. Further, ZYQL significantly reduced ROS level and enhanced the antioxidant defense in C. elegans. ZYQL increased transcriptional activity of transcription factors HSF-1 and SKN-1, and ZYQL-mediated longevity was dependent on these factors. Taken together, the data suggested that ZYQL enhanced the transcriptional activity of transcription factors HSF-1 and SKN-1, which in turn increased oxidative/heat stress resistance to exert its anti-aging effect in C. elegans. Our results provide new insights into the beneficial effects and underlying mechanisms of ZYQL, which might be useful for further developing ZYQL into health or anti-aging beverages.
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Affiliation(s)
- Xiaodong Cui
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan 030006, PR China.
| | - Bairui Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan 030006, PR China
| | - Zhe Li
- School of Life Science, Shanxi University, Taiyuan 030006, PR China.
| | - Chen Li
- School of Life Science, Shanxi University, Taiyuan 030006, PR China.
| | - Jiao Li
- School of Life Science, Shanxi University, Taiyuan 030006, PR China.
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25
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Zeng X, Mo Z, Zheng J, Wei C, Dai Y, Yan Y, Qiu S. Effects of biofilm and co-culture with Bacillus velezensis on the synthesis of esters in the strong flavor Baijiu. Int J Food Microbiol 2023; 394:110166. [PMID: 36921483 DOI: 10.1016/j.ijfoodmicro.2023.110166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/30/2023] [Accepted: 03/01/2023] [Indexed: 03/11/2023]
Abstract
Biofilm plays an important role in resisting the adverse environment, improving the taste and texture, and promoting the synthesis of flavor substances. However, to date, the findings on the effect of biofilm and dominating bacteria Bacillus on the ester synthesis in the Baijiu field have been largely lacked. Therefore, the objectives of the present study were to primarily isolate biofilm-producing microbes in the fermented grains, evaluate the stress tolerance capacity, and unveil the effect of biofilm and co-culture with Bacillus on the ester synthesis in the strong flavor Baijiu. Results indicated that after isolation and evaluation of stress-tolerance capacity, bacterial strain BG-5 and yeast strains YM-21 and YL-10 were demonstrated as mediate or strong biofilm-producing microbes and were identified as Bacillus velezensis, Saccharomycopsis fibuligera, and Zygosaccharomyces bailii, respectively. Solid phase microextraction/gas chromatography-mass spectrometer indicated that biofilm could enhance the diversity of esters while reduce the contents of ester. The scanning electron microscopy showed an inhibitory effect of B. velezensis on the growth of S. fibuligera, further restraining the production of esters. Taken together, both biofilm and B. velezensis influence the ester synthesis process. The present study is the first to reveal the biofilm-producing microorganisms in fermented grains and to preliminarily investigate the effect of biofilm on the ester synthesis in the Baijiu field.
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Affiliation(s)
- Xiangyong Zeng
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biopharmacy, Guizhou University, Guiyang City 550025, China.
| | - Zhenni Mo
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Department of Light Industry and Chemical Engineering, Guizhou Light Industry Technical College, Guiyang City 550025, China
| | - Jia Zheng
- Wuliangye Yibin Co Ltd, No.150 Minjiang West Road, Yibin City 644007, China
| | - Chaoyang Wei
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biopharmacy, Guizhou University, Guiyang City 550025, China
| | - Yifeng Dai
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biopharmacy, Guizhou University, Guiyang City 550025, China
| | - Yan Yan
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biopharmacy, Guizhou University, Guiyang City 550025, China
| | - Shuyi Qiu
- College of Liquor and Food Engineering, Guizhou University, Guiyang City 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biopharmacy, Guizhou University, Guiyang City 550025, China
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26
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Wang Z, Song L, Liu X, Shen X, Li X. Bacterial second messenger c-di-GMP: Emerging functions in stress resistance. Microbiol Res 2023; 268:127302. [PMID: 36640720 DOI: 10.1016/j.micres.2023.127302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
In natural environments, bacteria constantly encounter various stressful conditions, including nutrient starvation, toxic chemicals, and oxidative stress. The ability to adapt to these adverse conditions is crucial for bacterial survival. Frequently, bacteria utilize nucleotide signaling molecules such as cyclic diguanylate (c-di-GMP) to regulate their behaviors when encounter stress conditions. c-di-GMP is a ubiquitous bacterial second messenger regulating the transition between the planktonic state and biofilm state. An essential feature of biofilms is the production of extracellular matrix that covers bacterial cells and offers a physical barrier protecting the cells from environmental assaults. Beyond that, accumulating evidences have demonstrated that changes in the environment, including stress stimuli, cause the alteration of intracellular levels of c-di-GMP in bacterial cells, which is immediately sensed by a variety of downstream effectors that induce an appropriate stress response. In this review, we summarize recent research on the role of c-di-GMP signaling in bacterial responses to diverse stress conditions.
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Affiliation(s)
- Zhuo Wang
- Yuncheng Key Laboratory of Halophiles Resources Utilization, College of Life Sciences, Yuncheng University, Yuncheng, Shanxi 044000, People's Republic of China
| | - Li Song
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xiaozhen Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xihui Shen
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xin Li
- Yuncheng Key Laboratory of Halophiles Resources Utilization, College of Life Sciences, Yuncheng University, Yuncheng, Shanxi 044000, People's Republic of China.
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27
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Arbeev KG, Bagley O, Yashkin AP, Duan H, Akushevich I, Ukraintseva SV, Yashin AI. Understanding Alzheimer's disease in the context of aging: Findings from applications of stochastic process models to the Health and Retirement Study. Mech Ageing Dev 2023; 211:111791. [PMID: 36796730 PMCID: PMC10085865 DOI: 10.1016/j.mad.2023.111791] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 01/27/2023] [Accepted: 02/13/2023] [Indexed: 02/16/2023]
Abstract
There is growing literature on applications of biodemographic models, including stochastic process models (SPM), to studying regularities of age dynamics of biological variables in relation to aging and disease development. Alzheimer's disease (AD) is especially good candidate for SPM applications because age is a major risk factor for this heterogeneous complex trait. However, such applications are largely lacking. This paper starts filling this gap and applies SPM to data on onset of AD and longitudinal trajectories of body mass index (BMI) constructed from the Health and Retirement Study surveys and Medicare-linked data. We found that APOE e4 carriers are less robust to deviations of trajectories of BMI from the optimal levels compared to non-carriers. We also observed age-related decline in adaptive response (resilience) related to deviations of BMI from optimal levels as well as APOE- and age-dependence in other components related to variability of BMI around the mean allostatic values and accumulation of allostatic load. SPM applications thus allow revealing novel connections between age, genetic factors and longitudinal trajectories of risk factors in the context of AD and aging creating new opportunities for understanding AD development, forecasting trends in AD incidence and prevalence in populations, and studying disparities in those.
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Affiliation(s)
- Konstantin G Arbeev
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA.
| | - Olivia Bagley
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
| | - Arseniy P Yashkin
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
| | - Hongzhe Duan
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
| | - Igor Akushevich
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
| | - Svetlana V Ukraintseva
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
| | - Anatoliy I Yashin
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC 27705, USA
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28
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Li C, Gao M, Zheng G, Ma X, Liu X, Yu W. Enhanced quorum sensing capacity via regulating microenvironment to facilitate stress resistance of probiotic in alginate-based microcapsules. Int J Biol Macromol 2023; 225:605-614. [PMID: 36410534 DOI: 10.1016/j.ijbiomac.2022.11.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 11/01/2022] [Accepted: 11/12/2022] [Indexed: 11/19/2022]
Abstract
Alginate-based microcapsule has becoming a promising carrier for probiotic encapsulation due to the improved stress resistant ability. Besides the physical protection of microcapsules, bacterial quorum sensing (QS) is another prominent factor affecting microbial stress resistance in microcapsules. In the present study, Vibrio harveyi cells were entrapped and proliferated into cell aggregates in alginate-based microcapsules. The microenvironment composed of cells and biomacromolecules was regulated by the diameter, alginate concentration and core state of microcapsule. Then the effect of microenvironment on bacterial QS capacity was investigated, including bioluminescence, autoinducers (AIs) production and QS related genes expression. The highest diameter of 1200 μm and highest alginate concentration of 2.0 % w/v under the investigation range presented strongest QS capacity, and the maintenance of hydrogel core could enhance bacterial QS. Moreover, the mechanism analysis revealed that the formed biofilm on the surface of cell aggregates hampered the outward transfer of AIs, and the local AIs inside the cell aggregates induced stronger bacteria QS by close-range interaction. As a whole, these findings are helpful to guide the technological development and optimization of microencapsulated probiotics with stronger stress resistance, and the potential application in food, dairy, wastewater treatment and biosensor.
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Affiliation(s)
- Cheng Li
- The Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, PR China
| | - Meng Gao
- Laboratory of Biomedical Materials Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
| | - Guoshuang Zheng
- The Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, PR China
| | - Xiaojun Ma
- Laboratory of Biomedical Materials Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
| | - Xiudong Liu
- College of Environment and Chemical Engineering, Dalian University, Dalian Economic Technological Development Zone, Dalian 116622, PR China.
| | - Weiting Yu
- The Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, PR China; Laboratory of Biomedical Materials Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
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Zhu F, Bulut M, Cheng Y, Alseekh S, Fernie AR. Metabolite-Based Genome-Wide Association Studies of Large-Scale Metabolome Analysis to Illustrate Alterations in the Metabolite Landscape of Plants upon Responses to Stresses. Methods Mol Biol 2023; 2642:241-255. [PMID: 36944883 DOI: 10.1007/978-1-0716-3044-0_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Given that anthropogenic activities are evoking a profound effect on the climate resulting in more extreme events such as severe drought and heat waves while global demand for food is ever-increasing, understanding plant responses to stresses is critical. As metabolites are fundamental for plant growth regulation and plant lifespan and an important component of yield, illustrating how the metabolite landscape of plant changes following stress will supply important clues as to how to improve the plant resistance to stress. Recently, billions of single-nucleotide polymorphisms (SNPs) have been obtained and used to identify the associations between genetic variants of genomes and relevant crop agronomic traits through different genetic methods such as genome-wide association studies (GWAS). Therefore, in this chapter, we provide comprehensive guidelines concerning the experimental design, metabolite profiling, and metabolite-based genome-wide association studies (mGWAS) of large-scale metabolome analysis to accelerate the future identification of the valuable stress-resistant genes and metabolites.
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Affiliation(s)
- Feng Zhu
- National R&D Center for Citrus Preservation, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Mustafa Bulut
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Yunjiang Cheng
- National R&D Center for Citrus Preservation, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Saleh Alseekh
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv, Bulgaria
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
- Center of Plant Systems Biology and Biotechnology, Plovdiv, Bulgaria.
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Yang Y, Pan D, Tang Y, Li J, Zhu K, Yu Z, Zhu L, Wang Y, Chen P, Li C. H3-T6SS of Pseudomonas aeruginosa PA14 contributes to environmental adaptation via secretion of a biofilm-promoting effector. Stress Biol 2022; 2:55. [PMID: 37676573 PMCID: PMC10442045 DOI: 10.1007/s44154-022-00078-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 12/11/2022] [Indexed: 09/08/2023]
Abstract
Microbial species often occur in complex communities and exhibit intricate synergistic and antagonistic interactions. To avoid predation and compete for favorable niches, bacteria have evolved specialized protein secretion systems. The type VI secretion system (T6SS) is a versatile secretion system widely distributed among Gram-negative bacteria that translocates effectors into target cells or the extracellular milieu via various physiological processes. Pseudomonas aeruginosa is an opportunistic pathogen responsible for many diseases, and it has three independent T6SSs (H1-, H2-, and H3-T6SS). In this study, we found that the H3-T6SS of highly virulent P. aeruginosa PA14 is negatively regulated by OxyR and OmpR, which are global regulatory proteins of bacterial oxidative and acid stress. In addition, we identified a H3-T6SS effector PA14_33970, which is located upstream of VgrG3. PA14_33970 interacted directly with VgrG3 and translocated into host cells. Moreover, we found that H3-T6SS and PA14_33970 play crucial roles in oxidative, acid, and osmotic stress resistance, as well as in motility and biofilm formation. PA14_33970 was identified as a new T6SS effector promoting biofilm formation and thus named TepB. Furthermore, we found that TepB contributes to the virulence of P. aeruginosa PA14 toward Caenorhabditis elegans. Overall, our study indicates that H3-T6SS and its biofilm-promoting effector TepB are regulated by OxyR and OmpR, both of which are important for adaptation of P. aeruginosa PA14 to multiple stressors, providing insights into the regulatory mechanisms and roles of T6SSs in P. aeruginosa.
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Affiliation(s)
- Yantao Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Damin Pan
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yanan Tang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jiali Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Kaixiang Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Zonglan Yu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Lingfang Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yao Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Peng Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Changfu Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Wang W, Flury AG, Rodriguez AT, Garrison JL, Brem RB. A role for worm cutl-24 in background- and parent-of-origin-dependent ER stress resistance. BMC Genomics 2022; 23:842. [PMID: 36539699 PMCID: PMC9764823 DOI: 10.1186/s12864-022-09063-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 12/03/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Organisms in the wild can acquire disease- and stress-resistance traits that outstrip the programs endogenous to humans. Finding the molecular basis of such natural resistance characters is a key goal of evolutionary genetics. Standard statistical-genetic methods toward this end can perform poorly in organismal systems that lack high rates of meiotic recombination, like Caenorhabditis worms. RESULTS Here we discovered unique ER stress resistance in a wild Kenyan C. elegans isolate, which in inter-strain crosses was passed by hermaphrodite mothers to hybrid offspring. We developed an unbiased version of the reciprocal hemizygosity test, RH-seq, to explore the genetics of this parent-of-origin-dependent phenotype. Among top-scoring gene candidates from a partial-coverage RH-seq screen, we focused on the neuronally-expressed, cuticlin-like gene cutl-24 for validation. In gene-disruption and controlled crossing experiments, we found that cutl-24 was required in Kenyan hermaphrodite mothers for ER stress tolerance in their inter-strain hybrid offspring; cutl-24 was also a contributor to the trait in purebred backgrounds. CONCLUSIONS These data establish the Kenyan strain allele of cutl-24 as a determinant of a natural stress-resistant state, and they set a precedent for the dissection of natural trait diversity in invertebrate animals without the need for a panel of meiotic recombinants.
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Affiliation(s)
- Wenke Wang
- grid.272799.00000 0000 8687 5377Buck Institute for Research on Aging, Novato, CA United States ,grid.47840.3f0000 0001 2181 7878Department of Plant and Microbial Biology, UC Berkeley, Berkeley, CA United States
| | - Anna G. Flury
- grid.272799.00000 0000 8687 5377Buck Institute for Research on Aging, Novato, CA United States ,grid.47840.3f0000 0001 2181 7878Department of Plant and Microbial Biology, UC Berkeley, Berkeley, CA United States
| | - Andrew T. Rodriguez
- grid.272799.00000 0000 8687 5377Buck Institute for Research on Aging, Novato, CA United States ,grid.42505.360000 0001 2156 6853Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA United States
| | - Jennifer L. Garrison
- grid.272799.00000 0000 8687 5377Buck Institute for Research on Aging, Novato, CA United States ,grid.42505.360000 0001 2156 6853Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA United States ,grid.266102.10000 0001 2297 6811Department of Cellular and Molecular Pharmacology, UC San Francisco, San Francisco, CA United States ,Global Consortium for Reproductive Longevity & Equality, Novato, CA United States
| | - Rachel B. Brem
- grid.272799.00000 0000 8687 5377Buck Institute for Research on Aging, Novato, CA United States ,grid.47840.3f0000 0001 2181 7878Department of Plant and Microbial Biology, UC Berkeley, Berkeley, CA United States ,grid.42505.360000 0001 2156 6853Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA United States
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Hoppert L, Kölling R, Einfalt D. Investigation of stress tolerance of Pichia kudriavzevii for high gravity bioethanol production from steam-exploded wheat straw hydrolysate. Bioresour Technol 2022; 364:128079. [PMID: 36220531 DOI: 10.1016/j.biortech.2022.128079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/01/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
This study investigated a newly isolated thermotolerant strain of Pichia kudriavzevii with respect to its stress tolerance and fermentation performance. Response surface methodology was applied to evaluate the combined effects of furfural, osmotic and thermal stress on ethanol yield. The proposed model shows that P. kudriavzevii has a natural resistance against multiple stress factors. Further evolutionary adaptation of the isolated strain in lignocellulosic hydrolysates improved the ethanol yield by ≥ 24 %. The adapted strain HYPK213_ELA was able to produce ethanol from wheat straw hydrolysates at a high solid loading of 37 %ww-1 at 40 °C and anaerobic conditions. The highest ethanol concentration of 56.8 ± 1.0 gL-1 was reached at 40°C with an inoculum size of 2.5 × 106cellsmL-1. The results show that Pichia kudriavzevii has the potential to enable high gravity bioethanol production under conditions where most yeast strains are unable to grow.
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Affiliation(s)
- Luis Hoppert
- Institute of Food Science and Biotechnology, Yeast Genetics and Fermentation Technology, University of Hohenheim, Garbenstraße 23, 70599 Stuttgart, Germany.
| | - Ralf Kölling
- Institute of Food Science and Biotechnology, Yeast Genetics and Fermentation Technology, University of Hohenheim, Garbenstraße 23, 70599 Stuttgart, Germany
| | - Daniel Einfalt
- Institute of Food Science and Biotechnology, Yeast Genetics and Fermentation Technology, University of Hohenheim, Garbenstraße 23, 70599 Stuttgart, Germany
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Bi Y, Wang X, Cai Y, Christie P. Arbuscular mycorrhizal colonization increases plant above-belowground feedback in a northwest Chinese coal mining-degraded soil by increasing photosynthetic carbon assimilation and allocation to maize. Environ Sci Pollut Res Int 2022; 29:72612-72627. [PMID: 35610456 DOI: 10.1007/s11356-022-19838-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/17/2022] [Indexed: 06/15/2023]
Abstract
A three-compartment culture system was used to study the mechanism by which the AM fungus Funneliformis mosseae influences host plant growth and soil organic carbon (SOC) content in a northwest China coal mining area. A 13CO2 pulse tracing technique was used to trace the allocation of maize photosynthetic C in shoots, roots, AM fungus, and soil. Carbon accumulation and allocation in mycorrhizal (inoculated with Funneliformis mosseae) and non-mycorrhizal treatments were detected. AM fungal inoculation significantly increased the 13C concentration and content in both above- and below-ground plant parts and also significantly enhanced anti-aging ability by increasing soluble sugars and catalase activity (CAT) in maize leaves while reducing foliar malondialdehyde content (MDA) and leaf temperature and promoted plant growth. AM fungi also increased P uptake to promote maize growth. Soil organic carbon (SOC), glomalin, microbial biomass carbon (MBC), and nitrogen (MBN) contents increased significantly after inoculation. A mutually beneficial system was established involving maize, the AM fungus and the microbiome, and the AM fungus became an important regulator of C flux between the above- and below-ground parts of the system. Inoculation with the AM fungus promoted plant growth, C fixation and allocation belowground to enhance soil quality. A positive above-belowground feedback appeared to be established.
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Affiliation(s)
- Yinli Bi
- State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing, 100083, China.
- Institute of Ecological Environmental Restoration in Mine Areas of West China, Xi'an University of Science and Technology, Xi'an, 710054, China.
| | - Xiao Wang
- State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Yun Cai
- State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Peter Christie
- Institute of Ecological Environmental Restoration in Mine Areas of West China, Xi'an University of Science and Technology, Xi'an, 710054, China
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Chen W, Chen Z, Shan S, Wu A, Zhao C, Ye X, Zheng X, Zhu R. Cyanidin-3-O-glucoside promotes stress tolerance and lifespan extension of Caenorhabditis elegans exposed to polystyrene via DAF-16 pathway. Mech Ageing Dev 2022; 207:111723. [PMID: 35988813 DOI: 10.1016/j.mad.2022.111723] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/12/2022] [Accepted: 08/11/2022] [Indexed: 10/15/2022]
Abstract
Microplastic pollution has attracted growing attention due to its prevalent and persistent exposure to general population through the food chain, but few reports have focused on the toxicological prevention of polystyrene (PS). Using the wild-type and mutant strains, this study explored the impacts of PS and cyanidin-3-O-glucoside (C3G) on stress tolerance and lifespan of Caenorhabditis elegans (C. elegans). In N2 nematodes, PS exposure initiated the oxidative stress and subsequent lifespan reduction, while these adverse impacts could be positively improved by C3G treatment. Considering the pivotal role of DAF-16 pathway in stress tolerance and lifespan regulation, the expression of the daf-16 gene and its downstream antioxidant genes (clt-2, hsp-16.1, sod-3, sod-5) were examined, and found to be significantly enhanced by C3G. Since the sod-3 gene was up-regulated the most fold by C3G, the activity of SOD enzyme that encoded by the sod-3 was examined, and could be obviously enhanced upon C3G treatment. This explained the improved oxidative stress and delayed oxidation-associated aging after C3G intervention. Nevertheless, these positive effects of C3G were weakened in daf-16(-) mutant strain (with deleted DAF-16 gene), for which the beneficial effects of C3G in promoting stress resistance and lifespan extension were inhibited. These findings suggested that the DAF-16 gene and its downstream antioxidant genes, have participated in C3G's regulations on redox balance and lifespan that impacted by nano-polystyrene particles. This study highlighted the link between dietary components and environmentally driven disturbance.
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Affiliation(s)
- Wen Chen
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China
| | - Zhen Chen
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Shuo Shan
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Aibo Wu
- SIBS-UGENT-SJTU Joint Laboratory of Mycotoxin Research, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Chao Zhao
- College of Marine Sciences, Fujian Agriculture and Forestry University, Fujian 350002, China
| | - Xiang Ye
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China
| | - Xiaodong Zheng
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, China
| | - Ruiyu Zhu
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
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Terzioğlu E, Arslan M, Balaban BG, Çakar ZP. Microbial silver resistance mechanisms: recent developments. World J Microbiol Biotechnol 2022; 38:158. [PMID: 35821348 DOI: 10.1007/s11274-022-03341-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/19/2022] [Indexed: 01/12/2023]
Abstract
In this mini-review, after a brief introduction into the widespread antimicrobial use of silver ions and nanoparticles against bacteria, fungi and viruses, the toxicity of silver compounds and the molecular mechanisms of microbial silver resistance are discussed, including recent studies on bacteria and fungi. The similarities and differences between silver ions and silver nanoparticles as antimicrobial agents are also mentioned. Regarding bacterial ionic silver resistance, the roles of the sil operon, silver cation efflux proteins, and copper-silver efflux systems are explained. The importance of bacterially produced exopolysaccharides as a physiological (biofilm) defense mechanism against silver nanoparticles is also emphasized. Regarding fungal silver resistance, the roles of metallothioneins, copper-transporting P-type ATPases and cell wall are discussed. Recent evolutionary engineering (adaptive laboratory evolution) studies are also discussed which revealed that silver resistance can evolve rapidly in bacteria and fungi. The cross-resistance observed between silver resistance and resistance to other heavy metals and antibiotics in bacteria and fungi is also explained as a clinically and environmentally important issue. The use of silver against bacterial and fungal biofilm formation is also discussed. Finally, the antiviral effects of silver and the use of silver nanoparticles against SARS-CoV-2 and other viruses are mentioned. To conclude, silver compounds are becoming increasingly important as antimicrobial agents, and their widespread use necessitates detailed understanding of microbial silver response and resistance mechanisms, as well as the ecological effects of silver compounds. Figure created with BioRender.com.
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Feng S, Xu X, Tao S, Chen T, Zhou L, Huang Y, Yang H, Yuan M, Ding C. Comprehensive evaluation of chemical composition and health-promoting effects with chemometrics analysis of plant derived edible oils. Food Chem X 2022; 14:100341. [PMID: 35634224 PMCID: PMC9133763 DOI: 10.1016/j.fochx.2022.100341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/14/2022] [Accepted: 05/18/2022] [Indexed: 11/30/2022] Open
Abstract
22 edible oils can be discriminated based on tocopherol and phytosterol contents. In vitro antioxidant activity is correlated to polyphenol, tocopherol, and squalene. Oxidative and heat stress resistance is correlated to tocopherol and phytosterol. In vivo antioxidant activity is correlated to polyphenol, squalene, MUFA and PUFA.
In the last decade, with a growing emphasis on healthy diets, functional edible oils with high nutritional quality are becoming increasingly popular around the world. This study systematically compared the chemical composition and protective effect of 22 vegetable oils using multivariate chemometric tools. The results showed that the fatty acid composition and minor compounds were extremely variable among tested oils. Hierarchical cluster and principal component analysis discriminated these oils according to the tocopherol and phytosterol contents. The Pearson’s correlation analysis indicated that in vitro radical scavenging capacity was significantly correlated to polyphenol, tocopherol, and squalene. Additionally, the ameliorate effects on the heat and oxidative stress, ROS contents, and antioxidant enzyme activities were measured in Caenorhabditis elegans. The results showed that the antioxidant activity and stress resistance were positively correlated to polyphenol, tocopherol, phytosterol, MUFA, and PUFA, respectively. This study may offer an insight into oil discrimination and functional oil exploitation.
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Affiliation(s)
- Shiling Feng
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Xiaoyan Xu
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Shengyong Tao
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Tao Chen
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Lijun Zhou
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Yan Huang
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Hongyu Yang
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Ming Yuan
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Chunbang Ding
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
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Saul N, Dhondt I, Kuokkanen M, Perola M, Verschuuren C, Wouters B, von Chrzanowski H, De Vos WH, Temmerman L, Luyten W, Zečić A, Loier T, Schmitz-Linneweber C, Braeckman BP. Identification of healthspan-promoting genes in Caenorhabditis elegans based on a human GWAS study. Biogerontology 2022; 23:431-452. [PMID: 35748965 PMCID: PMC9388463 DOI: 10.1007/s10522-022-09969-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/16/2022] [Indexed: 12/03/2022]
Abstract
To find drivers of healthy ageing, a genome-wide association study (GWAS) was performed in healthy and unhealthy older individuals. Healthy individuals were defined as free from cardiovascular disease, stroke, heart failure, major adverse cardiovascular event, diabetes, dementia, cancer, chronic obstructive pulmonary disease (COPD), asthma, rheumatism, Crohn’s disease, malabsorption or kidney disease. Six single nucleotide polymorphisms (SNPs) with unknown function associated with ten human genes were identified as candidate healthspan markers. Thirteen homologous or closely related genes were selected in the model organism C. elegans for evaluating healthspan after targeted RNAi-mediated knockdown using pathogen resistance, muscle integrity, chemotaxis index and the activity of known longevity and stress response pathways as healthspan reporters. In addition, lifespan was monitored in the RNAi-treated nematodes. RNAi knockdown of yap-1, wwp-1, paxt-1 and several acdh genes resulted in heterogeneous phenotypes regarding muscle integrity, pathogen resistance, chemotactic behaviour, and lifespan. Based on these observations, we hypothesize that their human homologues WWC2, CDKN2AIP and ACADS may play a role in health maintenance in the elderly.
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Affiliation(s)
- Nadine Saul
- Molecular Genetics Group, Institute of Biology, Humboldt University of Berlin, Berlin, Germany.
| | - Ineke Dhondt
- Laboratory of Aging Physiology and Molecular Evolution, Biology Department, Ghent University, Ghent, Belgium
| | - Mikko Kuokkanen
- Genomics and Biomarkers Unit, Department of Health, National Institute for Health and Welfare, Helsinki, Finland.,Department of Human Genetics and South Texas Diabetes and Obesity Institute, School of Medicine, The University of Texas Rio Grande Valley, Brownsville, TX, USA
| | - Markus Perola
- Genomics and Biomarkers Unit, Department of Health, National Institute for Health and Welfare, Helsinki, Finland
| | - Clara Verschuuren
- Laboratory of Aging Physiology and Molecular Evolution, Biology Department, Ghent University, Ghent, Belgium
| | | | - Henrik von Chrzanowski
- Molecular Genetics Group, Institute of Biology, Humboldt University of Berlin, Berlin, Germany.,The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | | | | | - Aleksandra Zečić
- Laboratory of Aging Physiology and Molecular Evolution, Biology Department, Ghent University, Ghent, Belgium
| | - Tim Loier
- Laboratory of Aging Physiology and Molecular Evolution, Biology Department, Ghent University, Ghent, Belgium
| | | | - Bart P Braeckman
- Laboratory of Aging Physiology and Molecular Evolution, Biology Department, Ghent University, Ghent, Belgium
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Wu J, Gao T, Hu J, Zhao L, Yu C, Ma F. Research advances in function and regulation mechanisms of plant small heat shock proteins (sHSPs) under environmental stresses. Sci Total Environ 2022; 825:154054. [PMID: 35202686 DOI: 10.1016/j.scitotenv.2022.154054] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 05/27/2023]
Abstract
Plants respond to various stresses by triggering the expression of genes that encode proteins involved in plant growth, fruit ripening, cellular protein homeostasis, and tolerance systems. sHSPs, a subfamily of heat shock proteins (HSPs), can be expressed in plants to inhibit abnormal aggregation of proteins and protect normal proteins by interacting with folding target proteins, protect cell integrity, and improve resistance under various adverse conditions. Thus, sHSPs have significant influences on seed germination and plant development. In this review, the classification, structure, and functions of sHSP family members in plants are systematically summarized, with emphasis on their roles in promoting fruit ripening and plant growth by reducing the accumulation of ROS, improving the survival rate of plants and the antioxidant activity, and protecting photosynthesis under biotic and abiotic stresses. Meanwhile, the production and regulatory mechanisms of sHSPs are described in detail. Heat shock factors, long non-coding RNA (lncRNAs), microRNA (miRNAs), and FK506 binding proteins are related to the production process of sHSPs. Molecular chaperone complex HSP70/100, plastidic proteins, and abscisic acid (ABA) are involved in the regulatory mechanisms of sHSPs. Besides, scientific efforts and practices for improving plant stress resistance have carried out the constitutive expression of sHSPs in transgenic plants in recent years. It is a powerful path for inducing the protective mechanisms of plants under various stresses. Therefore, exploring the role of sHSPs in the plant defense system paves a way for comprehensively unraveling plant tolerance in response to biotic and abiotic stress.
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Affiliation(s)
- Jieting Wu
- School of Environmental Science, Liaoning University, Shenyang 110036, People's Republic of China.
| | - Tian Gao
- School of Environmental Science, Liaoning University, Shenyang 110036, People's Republic of China
| | - Jianing Hu
- Dalian Neusoft University of Information, Dalian 116032, People's Republic of China
| | - Lei Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Chang Yu
- School of Environmental Science, Liaoning University, Shenyang 110036, People's Republic of China
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China.
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Cao K, Peng Z, Zhao X, Li Y, Liu K, Arus P, Fang W, Chen C, Wang X, Wu J, Fei Z, Wang L. Chromosome-level genome assemblies of four wild peach species provide insights into genome evolution and genetic basis of stress resistance. BMC Biol 2022; 20:139. [PMID: 35698132 PMCID: PMC9195245 DOI: 10.1186/s12915-022-01342-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 05/30/2022] [Indexed: 12/25/2022] Open
Abstract
Background Peach (Prunus persica) is an economically important stone fruit crop in Rosaceae and widely cultivated in temperate and subtropical regions, emerging as an excellent material to study the interaction between plant and environment. During its genus, there are four wild species of peach, all living in harsh environments. For example, one of the wild species, P. mira, originates from the Qinghai-Tibet Plateau (QTP) and exhibits strong cold/ultraviolet ray environmental adaptations. Although remarkable progresses in the gene discovery of fruit quality-related traits in peach using previous assembled genome were obtained, genomic basis of the response of these wild species to different geographical environments remains unclear. Results To uncover key genes regulating adaptability in different species and analyze the role of genetic variations in resistance formation, we performed de novo genome assembling of four wild relatives of peach (P. persica), P. mira, P. davidiana, P. kansuensis, and P. ferganensis and resequenced 175 peach varieties. The phylogenetic tree showed that the divergence time of P. mira and other wild relatives of peach was 11.5 million years ago, which was consistent with the drastic crustal movement of QTP. Abundant genetic variations were identified in four wild species when compared to P. persica, and the results showed that plant-pathogen interaction pathways were enriched in genes containing small insertions and deletions and copy number variations in all four wild relatives of peach. Then, the data were used to identify new genes and variations regulating resistance. For example, presence/absence variations which result from a hybridization event that occurred between P. mira and P. dulcis enhanced the resistance of their putative hybrid, P. davidiana. Using bulked segregant analysis, we located the nematode resistance locus of P. kansuensis in chromosome 2. Within the mapping region, a deletion in the promoter of one NBS-LRR gene was found to involve the resistance by regulating gene expression. Furthermore, combined with RNA-seq and selective sweeps analysis, we proposed that a deletion in the promoter of one CBF gene was essential for high-altitude adaptation of P. mira through increasing its resistance to low temperature. Conclusions In general, the reference genomes assembled in the study facilitate our understanding of resistance mechanism of perennial fruit crops, and provide valuable resources for future breeding and improvement. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01342-y.
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Affiliation(s)
- Ke Cao
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China.
| | - Zhen Peng
- Novogene Bioinformatics Institute, Beijing, People's Republic of China
| | - Xing Zhao
- Novogene Bioinformatics Institute, Beijing, People's Republic of China
| | - Yong Li
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Kuozhan Liu
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Pere Arus
- IRTA, Centre de Recerca en Agrigenòmica, CSIC-IRTA-UAB-UB, Campus UAB - Edifici CRAG, Cerdanyola del Vallès (Bellaterra), Barcelona, Spain
| | - Weichao Fang
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Changwen Chen
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Xinwei Wang
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Jinlong Wu
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China
| | - Zhangjun Fei
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
| | - Lirong Wang
- The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Fruit Tree Breeding Technology), Ministry of Agriculture, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China. .,National Horticulture Germplasm Resources Center, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, People's Republic of China.
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Yuan H, Zhou J, Li N, Wu X, Huang S, Park S. Isolation and identification of mucin-degrading bacteria originated from human feces and their potential probiotic efficacy according to host-microbiome enterotype. J Appl Microbiol 2022; 133:362-374. [PMID: 35365862 DOI: 10.1111/jam.15560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/25/2022] [Accepted: 03/30/2022] [Indexed: 11/26/2022]
Abstract
AIM Mucin-degrading bacteria are known to be beneficial for gut health. We aimed to isolate human-derived mucin-degrading bacteria and identify potential probiotic characteristics and their effects on the bacterial community and short-chain fatty acid (SCFA) production according to three different enterotypes of the host. METHODS AND RESULTS Bacteria with mucin decomposition ability from human feces were isolated and identified by 16S rRNA sequencing and MALDI-TOF. Heat resistance, acid resistance, antibiotic resistance, and antibacterial activity were analyzed in the selected bacteria. Their adhesion capability to the Caco-2 cell was determined by scanning electron microscopy. Their ability to alter the bacterial community and SCFA production of the isolated bacteria was investigated in three enterotypes. The three isolated strains were Bifidobacterium(B.) animalis SPM01 (CP001606.1, 99%), B. longum SPM02 (NR_043437.1, 99%), and Limosilactobacillus(L.) reuteri SPM03 (CP000705.1, 99%) deposited in Korean Collection for Type Culture (KCTC-18958P). Among them, B. animalis exhibited the highest mucin degrading ability. They exhibited strong resistance to acidic conditions, moderate resistance to heat, and the ability to adhere tightly to Caco-2 cells. Three isolated mucin-degrading bacteria incubation increased Lactobacillus in the fecal bacteria from Bacteroides and Prevotella enterotypes. However, only L. reuteri elevated Lactobacillus in the fecal bacteria from the Ruminococcus enterotype. B. longum and B. animalis increased the α-diversity in the Ruminococcus enterotype, while their incubation with other intestinal types decreased the α-diversity. B. animalis and L. reuteri increased the butyric acid level in fecal bacteria from the Prevotella enterotype, and L. reuteri elevated the acetic acid level in those from the Ruminococcus enterotype. However, the overall SCFA changes were minimal. CONCLUSIONS The isolated mucin-degrading bacteria act as probiotics and modulate gut microbiota and SCFA production differently according to the host's enterotypes. SIGNIFICANCE AND IMPACT OF STUDY Probiotics need to be personalized according to the enterotypes in clinical application.
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Affiliation(s)
- Heng Yuan
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea
| | - Junyu Zhou
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea
| | - Nanxin Li
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea
| | - Xuangao Wu
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea
| | - Shaokai Huang
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea
| | - Sunmin Park
- Dept. of Bioconvergence, Hoseo University, Asan, South Korea.,Dept. of Food and Nutrition, Obesity/Diabetes Research Center, Hoseo University, Asan, South Korea
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Shaposhnikov MV, Zakluta AS, Zemskaya NV, Guvatova ZG, Shilova VY, Yakovleva DV, Gorbunova AA, Koval LA, Ulyasheva NS, Evgen'ev MB, Zatsepina OG, Moskalev AA. Deletions of the cystathionine-β-synthase (CBS) and cystathionine-γ-lyase (CSE) genes, involved in the control of hydrogen sulfide biosynthesis, significantly affect lifespan and fitness components of Drosophila melanogaster. Mech Ageing Dev 2022; 203:111656. [PMID: 35247392 DOI: 10.1016/j.mad.2022.111656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 02/02/2022] [Accepted: 02/28/2022] [Indexed: 12/14/2022]
Abstract
The gasotransmitter hydrogen sulfide (H2S) is an important biological mediator, playing an essential role in many physiological and pathological processes. It is produced by transsulfuration - an evolutionarily highly conserved pathway for the metabolism of sulfur-containing amino acids methionine and cysteine. Cystathionine-β-synthase (CBS) and cystathionine-γ-lyase (CSE) enzymes play a central role in cysteine metabolism and H2S production. Here we investigated the fitness components (longevity, stress resistance, viability of preimaginal stages, and reproductive function parameters) in D. melanogaster lines containing deletions of the CBS and CSE genes. Surprisingly, in most tests, CSE deletion improved, and CBS worsened the fitness. Lines with deletion of both CBS and CSE demonstrated better stress resistance and longevity than lines with single CBS deletion. At the same time, deletion of both CBS and CSE genes causes more serious disturbances of reproductive function parameters than single CBS deletion. Thus, a complex interaction of H2S-producing pathways and cellular stress response in determining the lifespan and fitness components of the whole organism was revealed.
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Affiliation(s)
- Mikhail V Shaposhnikov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation; Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Alexey S Zakluta
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Nadezhda V Zemskaya
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Zulfiya G Guvatova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Victoria Y Shilova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Daria V Yakovleva
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Anastasia A Gorbunova
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Liubov A Koval
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Natalia S Ulyasheva
- Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation.
| | - Mikhail B Evgen'ev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Olga G Zatsepina
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Alexey A Moskalev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation; Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russian Federation; Center for Precision Genome Editing and Genetic Technologies for Biomedicine Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
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Ghosh B, Guidry HJ, Johnston M, Bohnert KA. A Fat-Promoting Botanical Extract From Artemisia scoparia Exerts Geroprotective Effects on Caenorhabditis elegans Life Span and Stress Resistance. J Gerontol A Biol Sci Med Sci 2022; 77:1112-1120. [PMID: 35167659 PMCID: PMC9159661 DOI: 10.1093/gerona/glac040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Indexed: 11/13/2022] Open
Abstract
Like other biological processes, aging is not random but subject to molecular control. Natural products that modify core metabolic parameters, including fat content, may provide entry points to extend animal life span and promote healthy aging. Here, we show that a botanical extract from Artemisia scoparia (SCO), which promotes fat storage and metabolic resiliency in mice, extends the life span of the nematode Caenorhabditis elegans by up to 40%. Notably, this life-span extension depends significantly on SCO's effects on fat; SCO-treated worms exhibit heightened levels of unsaturated fat, and inhibition of Δ9 desaturases, which oversee biosynthesis of monounsaturated fatty acids, prevents SCO-dependent fat accumulation and life-span extension. At an upstream signaling level, SCO prompts changes to C. elegans fat regulation by stimulating nuclear translocation of transcription factor DAF-16/FOXO, an event that requires AMP-activated protein kinase under this condition. Importantly, animals treated with SCO are not only long-lived but also show improved stress resistance in late adulthood, suggesting that this fat-promoting intervention may enhance some aspects of physiological health in older age. These findings identify SCO as a natural product that can modify fat regulation for longevity benefit and add to growing evidence indicating that elevated fat can be prolongevity in some circumstances.
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Affiliation(s)
- Bhaswati Ghosh
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Hayden J Guidry
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Maxwell Johnston
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - K Adam Bohnert
- Address correspondence to: K. Adam Bohnert, PhD, Department of Biological Sciences, Louisiana State University, Room 220, Life Sciences Building, Baton Rouge, LA 70803, USA. E-mail:
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Yu CW, Wu YC, Liao VHC. Early developmental nanoplastics exposure disturbs circadian rhythms associated with stress resistance decline and modulated by DAF-16 and PRDX-2 in C. elegans. J Hazard Mater 2022; 423:127091. [PMID: 34488090 DOI: 10.1016/j.jhazmat.2021.127091] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/28/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
Plastics pollution is an emerging environmental problem and nanoplastics (NPs) toxicity has received great concern. This study investigated whether early developmental exposure to polystyrene NPs influence the circadian rhythms and the possible underlying mechanisms in C. elegans. We show that early developmental NPs exposure disturbs circadian rhythms in C. elegans and ASH neurons and G protein-coupled receptor kinase (GRK-2) are involved in the level of chemotaxis response. A higher bioconcentration factor in entrained worms was observed, suggesting that circadian interference results in increased NPs bioaccumulation in C. elegans. In addition, we show that reactive oxygen species produced by NPs exposure and peroxiredoxin-2 (PRDX-2) are related to the disturbed circadian rhythms. We further show that the NPs-induced circadian rhythms disruption is associated with stress resistance decline and modulated by transcription DAF-16/FOXO signaling. Because circadian rhythms are found in most living organisms and the fact that DAF-16 and PRDX-2 are evolutionarily conserved, our findings suggest a possible negative impact of NPs on circadian rhythms and stress resistance in higher organisms including humans.
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Affiliation(s)
- Chan-Wei Yu
- Department of Bioenvironmental Systems Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan
| | - Yi-Chun Wu
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan
| | - Vivian Hsiu-Chuan Liao
- Department of Bioenvironmental Systems Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan.
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Valencia EY, Barros JP, Ferenci T, Spira B. A Broad Continuum of E. coli Traits in Nature Associated with the Trade-off Between Self-preservation and Nutritional Competence. Microb Ecol 2022; 83:68-82. [PMID: 33846820 DOI: 10.1007/s00248-021-01751-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
A trade-off between reproduction and survival is a characteristic of many organisms. In bacteria, growth is constrained when cellular resources are channelled towards environmental stress protection. At the core of this trade-off in Escherichia coli is RpoS, a sigma factor that diverts transcriptional resources towards general stress resistance. The constancy of RpoS levels in natural isolates is unknown. A uniform RpoS content in E. coli would impart a narrow range of resistance properties to the species, whereas a diverse set of RpoS levels in nature should result in a diverse range of stress susceptibilities. We explore the diversity of trade-off settings and phenotypes by measuring the level of RpoS protein in strains of E. coli cohabiting in a natural environment. Strains from a stream polluted with domestic waste were investigated in monthly samples. Analyses included E. coli phylogroup classification, RpoS protein level, RpoS-dependent stress phenotypes and the sequencing of rpoS mutations. The most striking finding was the continuum of RpoS levels, with a 100-fold range of RpoS amounts consistently found in individuals in the stream. Approximately 1.8% of the sampled strains carried null or non-synonymous mutations in rpoS. The natural isolates also exhibited a broad (>100-fold) range of stress resistance responses. Our results are consistent with the view that a multiplicity of survival-multiplication trade-off settings is a feature of the species E. coli. The phenotypic diversity resulting from the trade-off permits bet-hedging and the adaptation of E. coli strains to a very broad range of environments.
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Affiliation(s)
- Estela Ynes Valencia
- Departamento de Microbiologia, Instituto de Ciências Biomédicas Universidade de São Paulo, São Paulo, SP, Brazil
| | - Jackeline Pinheiro Barros
- Departamento de Microbiologia, Instituto de Ciências Biomédicas Universidade de São Paulo, São Paulo, SP, Brazil
| | - Thomas Ferenci
- School of Life and Environmental Sciences, University of Sydney, 6/403 Pacific Highway, Sydney, New South Wales, 2070, Australia
| | - Beny Spira
- Departamento de Microbiologia, Instituto de Ciências Biomédicas Universidade de São Paulo, São Paulo, SP, Brazil.
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Lin J, Xu L, Yang J, Wang Z, Shen X. Beyond dueling: roles of the type VI secretion system in microbiome modulation, pathogenesis and stress resistance. Stress Biol 2021; 1:11. [PMID: 37676535 PMCID: PMC10441901 DOI: 10.1007/s44154-021-00008-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 08/09/2021] [Indexed: 09/08/2023]
Abstract
Bacteria inhabit diverse and dynamic environments, where nutrients may be limited and toxic chemicals can be prevalent. To adapt to these stressful conditions, bacteria have evolved specialized protein secretion systems, such as the type VI secretion system (T6SS) to facilitate their survival. As a molecular syringe, the T6SS expels various effectors into neighboring bacterial cells, eukaryotic cells, or the extracellular environment. These effectors improve the competitive fitness and environmental adaption of bacterial cells. Although primarily recognized as antibacterial weapons, recent studies have demonstrated that T6SSs have functions beyond interspecies competition. Here, we summarize recent research on the role of T6SSs in microbiome modulation, pathogenesis, and stress resistance.
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Affiliation(s)
- Jinshui Lin
- Shaanxi Key Laboratory of Chinese Jujube, College of Life Sciences, Yan'an University, Yan'an, Shaanxi, 716000, People's Republic of China
| | - Lei Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Jianshe Yang
- Shaanxi Key Laboratory of Chinese Jujube, College of Life Sciences, Yan'an University, Yan'an, Shaanxi, 716000, People's Republic of China
| | - Zhuo Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Xihui Shen
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
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Gao W, Zhang X, Zhang G, Zuo M, Cao W, Xie Z, Liu H. Is hyaluronic acid production transcriptionally regulated? A transcriptional repressor gene deletion study in Streptococcus zooepidemicus. Appl Microbiol Biotechnol 2021; 105:8495-504. [PMID: 34661707 DOI: 10.1007/s00253-021-11481-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/11/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
Hyaluronic acid (HA) is a multiple-function biopolymer that is widely used in food, cosmetic, and biomedical fields. In group C streptococci, the major workhorse of HA production in industry, the HA biosynthetic pathway has been proposed, while how HA synthesis is regulated is unclear. In this study, we identified twenty-five putative transcriptional repressors in S. zooepidemicus and studied whether they regulate HA synthesis or not. The individual gene deletion strain was firstly constructed, and the phenotypic changes of the corresponding deletion strains in stress tolerance and HA production were detected. The hrcA deletion strain is more sensitive to high temperature, and the rex deletion strain is more resistant to the oxidative stress. Three transcriptional repressor deletions resulted significantly decreased transcriptional levels of hasA, among which the scrR deletion strain shows most dramatical decrease in HA production. The regulatory mechanism of how ScrR affects the production of HA was further explored by transcriptional expression analysis of scrA and scrB, two direct target genes of ScrR regulon. Our results indicates that the deficiency of ScrR results in the unbalanced expression of scrA and scrB, which might also partly account for the decreasing production of HA. In agreement with the speculation, overexpression of scrB in ΔscrR genetic background results in 80% improvement in HA production. Taken together, the systemic genetic study of transcriptional repressors expands our understanding for the physiological regulation process of S. zooepidemicus and should help in the development of high-performance industrial strains for the efficient production of HA. KEY POINTS: • Twenty-two transcriptional repressor genes in S. zooepidemicus were deleted individually, and the phenotypes of corresponding mutants on a variety of conditions were characterized. • HrcA deficiency showed inferior cell tolerance to high temperature, and Rex deficiency showed superior cell tolerance to reactive oxygen stress, and four repressors deficiency showed inferior hyaluronic acid synthesis, among which the transcriptional levels of hasA of three mutants decreased significantly. • Optimizing sucrose metabolic flux can enhance hyaluronic acid synthesis significantly.
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Li M, Huang D, Zhou Y, Zhang J, Lin X, Chen J. The legacy effects of PM 2.5 depositon on Nerium Oleander L. Chemosphere 2021; 281:130682. [PMID: 34020193 DOI: 10.1016/j.chemosphere.2021.130682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Green plants have the capability to retain atmospheric particulate matter (PM) on their leaves, which can effectively reduce PM pollution, especially in the urban settings. Some studies reported that the periodic PM pollution could change plant retaining PM capacity, which, indeed, was the reason of physiological responses. In advancing the previous studies, we selected Nerium oleander L. to measure PM retention on leaf surface in a controlled environment by the following periods: initial pollution period (S1), recovery period (R), and secondary pollution period (S2) for a total of 12 weeks. The experimental design was one elevated pollution treatment (166 μg m-3) and one ambient control (28 μg m-3) with three replications. Results showed that during S2, the total retention decreased by 8.87 μg cm-2, which was about 10.4% significant lower than in S1. During the third week, the ascorbic acid content (ASA) in S1 was 6.71 mg g-1 significantly lower than that in S2 in the treatment. The total chlorophyll (Chl T) of the treatment decreased continuously and significantly by 33.8% in S1, but showed no similar trend in S2. The net photosynthetic rate of the treatment was significantly lower than that of the control, and the plants in the treatment showed a consistently high dark respiration rate than that in the control. The correlations between PM retention and ASA, Chl T and RWC were weaker in S1 than that in S2. In addition, air pollution tolerance index (APTI) showed a significant decline in plant pollution tolerance in the treatment during the third week.
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Affiliation(s)
- Ming Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Dongming Huang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Yuanhong Zhou
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Jing Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Xintao Lin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Jian Chen
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China.
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48
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Abstract
Polyamines (PAs) are positively charged amines such as putrescine, spermidine and spermine that ubiquitously exist in all organisms. They have been considered as a new type of plant biostimulants, with pivotal roles in many physiological processes. Polyamine levels are controlled by intricate regulatory feedback mechanisms. PAs are directly or indirectly regulated through interaction with signaling metabolites (H202, NO), aminobutyric acid (GABA), phytohormones (abscisic acid, gibberellins, ethylene, cytokinins, auxin, jasmonic acid and brassinosteroids) and nitrogen metabolism (maintaining the balance of C:N in plants). Exogenous applications of PAs enhance the stress resistance, flowering and fruit set, synthesis of bioactive compounds and extension of agricultural crops shelf life. Up-regulation of PAs biosynthesis by genetic manipulation can be a novel strategy to increase the productivity of agricultural crops. Recently, the role of PAs in symbiosis relationships between plants and beneficial microorganisms has been confirmed. PA metabolism has also been targeted to design new harmless fungicides.
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Affiliation(s)
- Fereshteh Kamiab
- Department of Horticulture, Faculty of Agriculture, Rafsanjan Branch, Islamic Azad University, Rafsanjan, Iran.
| | - Iraj Tavassolian
- Research and Technology Institute of Plant Production, Shahid Bahonar University of Kerman, Kerman, Iran.,Department of Horticulture, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Mehdi Hosseinifarahi
- Department of Horticultural Science, Yasooj Branch, Islamic Azad University, Yasooj, Iran
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49
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Garg R, Maldener I. The Formation of Spore-Like Akinetes: A Survival Strategy of Filamentous Cyanobacteria. Microb Physiol 2021; 31:296-305. [PMID: 34482304 DOI: 10.1159/000517443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/26/2021] [Indexed: 11/19/2022]
Abstract
Some cyanobacteria of the order Nostocales can form akinetes, spore-like dormant cells resistant to various unfavorable environmental fluctuations. Akinetes are larger than vegetative cells and contain large quantities of reserve products, mainly glycogen and the nitrogen storage polypeptide polymer cyanophycin. Akinetes are enveloped in a thick protective coat containing a multilayered structure and are able to germinate into new vegetative cells under suitable growth conditions. Here, we summarize the significant morphological and physiological changes that occur during akinete differentiation and germination and present our investigation of the physiological function of the storage polymer cyanophycin in these cellular processes. We show that the cyanophycin production is not required for formation and germination of the akinetes in the filamentous cyanobacterium Anabaena variabilis ATCC 29413.
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Affiliation(s)
- Ritu Garg
- Institute of Microbiology and Infection Medicine, Organismic Interactions, University of Tübingen, Tübingen, Germany
| | - Iris Maldener
- Institute of Microbiology and Infection Medicine, Organismic Interactions, University of Tübingen, Tübingen, Germany
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50
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Gao T, Li Y, Chai Y, Wang Q, Ding M. SigB regulates stress resistance, glucose starvation, MnSOD production, biofilm formation, and root colonization in Bacillus cereus 905. Appl Microbiol Biotechnol 2021; 105:5943-57. [PMID: 34350477 DOI: 10.1007/s00253-021-11402-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/25/2021] [Accepted: 05/29/2021] [Indexed: 10/20/2022]
Abstract
Bacillus cereus 905, originally isolated from wheat rhizosphere, exhibits strong colonization ability on wheat roots. Our previous studies showed that root colonization is contributed by the ability of the bacterium to efficiently utilize carbon sources and form biofilms and that the sodA2 gene-encoded manganese-containing superoxide dismutase (MnSOD2) plays an indispensable role in the survival of B. cereus 905 in the wheat rhizosphere. In this investigation, we further demonstrated that the ability of B. cereus 905 to resist adverse environmental conditions is partially attributed to activation of the alternative sigma factor σB, encoded by the sigB gene. The sigB mutant experienced a dramatic reduction in survival when cells were exposed to ethanol, acid, heat, and oxidative stress or under glucose starvation. Analysis of the sodA2 gene transcription revealed a partial, σB-dependent induction of the gene during glucose starvation or when treated with paraquat. In addition, the sigB mutant displayed a defect in biofilm formation under stress conditions. Finally, results from the root colonization assay indicated that sigB and sodA2 collectively contribute to B. cereus 905 colonization on wheat roots. Our study suggests a diverse role of SigB in rhizosphere survival and root colonization of B. cereus 905 under stress conditions. KEY POINTS : • SigB confers resistance to environmental stresses in B. cereus 905. • SigB plays a positive role in glucose utilization and biofilm formation in B. cereus. • SigB and SodA2 collectively contribute to colonization on wheat roots by B. cereus.
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