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Sato Y, Okano K, Honda K. Effects of small heat shock proteins from thermotolerant bacteria on the stress resistance of Escherichia coli to temperature, pH, and hyperosmolarity. Extremophiles 2024; 28:12. [PMID: 38252174 PMCID: PMC10803503 DOI: 10.1007/s00792-023-01326-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 11/28/2023] [Indexed: 01/23/2024]
Abstract
Small heat shock proteins (HSPs), such as HSP20, represent cellular thermal resistance mechanisms, to avoid protein aggregation at elevated temperatures. Recombinantly expressed HSP20s serve as a molecular tool for improving the tolerance of living cells to various physical and chemical stressors. Here, we aimed to heterologously express 18 HSP20s from 12 thermotolerant bacteria in Escherichia coli and evaluate their effects on various physical and chemical cellular stresses. Seventeen HSP20s were successfully expressed as soluble proteins. Recombinant E. coli cells were subjected to heat, cold, acidic, alkaline, and hyperosmolar stress to evaluate the effects of HSP20 proteins on stress resistance. Notably, the overexpression of 15 HSP20s enhanced the stress resistance of E. coli compared to that of the control strain. In particular, HSPs from Tepidimonas sediminis and Oceanithermus profundus improved the stress tolerance of E. coli under all tested conditions. In addition, E. coli harboring HSP20 from T. sediminis retained cell viability even after heat treatment at 52 °C for 5 days. To our knowledge, this is the first report of E. coli tolerance to prolonged (> 100 h) high-temperature stress. These findings indicate the potential of thermotolerant HSPs as molecular tools for improving stress tolerance in E. coli.
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Affiliation(s)
- Yu Sato
- Division of Agricultural Sciences, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, Japan.
- Graduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi, Yamaguchi, 753-8515, Japan.
- Research Center for Thermotolerant Microbial Resources, Yamaguchi University, Yamaguchi, 753-8515, Japan.
| | - Kenji Okano
- Department of Life Science and Biotechnology, Kansai University, Suita, Osaka, 564-8680, Japan
| | - Kohsuke Honda
- International Center for Biotechnology, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
- Industrial Biotechnology Initiative Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
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Jeyachandran S, Chellapandian H, Park K, Kwak IS. A Review on the Involvement of Heat Shock Proteins (Extrinsic Chaperones) in Response to Stress Conditions in Aquatic Organisms. Antioxidants (Basel) 2023; 12:1444. [PMID: 37507982 PMCID: PMC10376781 DOI: 10.3390/antiox12071444] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Heat shock proteins (HSPs) encompass both extrinsic chaperones and stress proteins. These proteins, with molecular weights ranging from 14 to 120 kDa, are conserved across all living organisms and are expressed in response to stress. The upregulation of specific genes triggers the synthesis of HSPs, facilitated by the interaction between heat shock factors and gene promoter regions. Notably, HSPs function as chaperones or helper molecules in various cellular processes involving lipids and proteins, and their upregulation is not limited to heat-induced stress but also occurs in response to anoxia, acidosis, hypoxia, toxins, ischemia, protein breakdown, and microbial infection. HSPs play a vital role in regulating protein synthesis in cells. They assist in the folding and assembly of other cellular proteins, primarily through HSP families such as HSP70 and HSP90. Additionally, the process of the folding, translocation, and aggregation of proteins is governed by the dynamic partitioning facilitated by HSPs throughout the cell. Beyond their involvement in protein metabolism, HSPs also exert a significant influence on apoptosis, the immune system, and various characteristics of inflammation. The immunity of aquatic organisms, including shrimp, fish, and shellfish, relies heavily on the development of inflammation, as well as non-specific and specific immune responses to viral and bacterial infections. Recent advancements in aquatic research have demonstrated that the HSP levels in populations of fish, shrimp, and shellfish can be increased through non-traumatic means such as water or oral administration of HSP stimulants, exogenous HSPs, and heat induction. These methods have proven useful in reducing physical stress and trauma, while also facilitating sustainable husbandry practices such as vaccination and transportation, thereby offering health benefits. Hence, the present review discusses the importance of HSPs in different tissues in aquatic organisms (fish, shrimp), and their expression levels during pathogen invasion; this gives new insights into the significance of HSPs in invertebrates.
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Affiliation(s)
- Sivakamavalli Jeyachandran
- Lab in Biotechnology & Biosignal Transduction, Department of Orthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai 600077, Tamil Nadu, India
| | - Hethesh Chellapandian
- Lab in Biotechnology & Biosignal Transduction, Department of Orthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai 600077, Tamil Nadu, India
| | - Kiyun Park
- Fisheries Science Institute, Chonnam National University, Yeosu 59626, Republic of Korea
| | - Ihn-Sil Kwak
- Fisheries Science Institute, Chonnam National University, Yeosu 59626, Republic of Korea
- Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Republic of Korea
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Huang C, Ijaz M, Chen L, Xiang C, Liang C, Li X, Blecker C, Wang Z, Zhang D. Effect of chilling rate on heat shock proteins abundance, myofibrils degradation and caspase‐3 activity in postmortem muscles. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Caiyan Huang
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
- University of Liège Gembloux Agro‐Bio Tech, Unit of Food Science and Formulation, Passage d es Déportés 2, Gembloux B‐5030 Belgium
| | - Muawuz Ijaz
- Department of Animal Sciences, CVAS‐Jhang 35200 University of Veterinary and Animal Sciences 54000 Lahore Pakistan
| | - Li Chen
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
| | - Can Xiang
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
| | - Ce Liang
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
| | - Xin Li
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
| | - Christophe Blecker
- University of Liège Gembloux Agro‐Bio Tech, Unit of Food Science and Formulation, Passage d es Déportés 2, Gembloux B‐5030 Belgium
| | - Zhenyu Wang
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
| | - Dequan Zhang
- Institute of Food Science and Technology Chinese Academy of Agriculture Sciences, Key Laboratory of Agro‐Products Quality & Safety Harvest, Storage, Transportation, Management and Control, Ministry of Agriculture and Rural Affairs, Beijing 100193 China
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Shi P, Zhou J, Song H, Wu Y, Lan L, Tang X, Ma Z, Vossbrinck CR, Vossbrinck B, Zhou Z, Xu J. Genomic analysis of Asian honeybee populations in China reveals evolutionary relationships and adaptation to abiotic stress. Ecol Evol 2020; 10:13427-13438. [PMID: 33304549 PMCID: PMC7713975 DOI: 10.1002/ece3.6946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 01/12/2023] Open
Abstract
The geographic and biological diversity of China has resulted in the differential adaptation of the eastern honeybee, Apis cerana, to these varied habitats. A. cerana were collected from 14 locations in China. Their genomes were sequenced, and nucleotide polymorphisms were identified at more than 9 million sites. Both STRUCTURE and principal component analysis placed the bees into seven groups. Phylogenomic analysis groups the honeybees into many of the same clusters with high bootstrap values (91%-100%). Populations from Tibet and South Yunnan are sister taxa and together represent the earliest diverging lineage included in this study. We propose that the evolutionary origin of A. cerana in China was in the southern region of Yunnan Province and expanded from there into the southeastern regions and into the northeastern mountain regions. The Cold-Temperate West Sichuan Plateau and Tropical Diannan populations were compared to identify genes under adaptive selection in these two habitats. Pathway enrichment analysis showing genes under selection, including the Hippo signaling pathway, GABAergic pathway, and trehalose-phosphate synthase, indicates that most genes under selection pressure are involved in the process of signal transduction and energy metabolism. qRT-PCR analysis reveals that one gene under selection, the AcVIAAT gene, involved in the GABAergic pathway, is responding to cold temperature stress. Through homologous recombination, we show that the AcVIAAT gene is able to replace the CNAG_01904 gene in the fungus Cryptococcus neoformans and that it makes the fungus less sensitive to conditions of oxidative stress and variations in temperature. Our results contribute to our understanding of the evolutionary origin of A. cerana in China and the molecular basis of environmental adaptation.
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Affiliation(s)
- Peng Shi
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Jun Zhou
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Huali Song
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Yujuan Wu
- State Key Laboratory of Silkworm Genome BiologySouthwest UniversityChongqingChina
| | - Lan Lan
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Xiangyou Tang
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Zhengang Ma
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
| | - Charles R. Vossbrinck
- Department of Environmental ScienceConnecticut Agricultural Experiment StationNew HavenCTUSA
| | | | - Zeyang Zhou
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
- State Key Laboratory of Silkworm Genome BiologySouthwest UniversityChongqingChina
| | - Jinshan Xu
- College of Life SciencesChongqing Normal UniversityChongqingChina
- Engineering Research Center of Biotechnology for Active SubstancesMinistry of EducationChongqingChina
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Deng Y, Hu Z, Shang L, Chai Z, Tang YZ. Transcriptional Responses of the Heat Shock Protein 20 (Hsp20) and 40 (Hsp40) Genes to Temperature Stress and Alteration of Life Cycle Stages in the Harmful Alga Scrippsiella trochoidea (Dinophyceae). BIOLOGY 2020; 9:biology9110408. [PMID: 33233461 PMCID: PMC7700488 DOI: 10.3390/biology9110408] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/13/2020] [Accepted: 11/18/2020] [Indexed: 01/17/2023]
Abstract
Simple Summary As the greatest contributors to harmful algal blooms, dinoflagellates account for roughly 75% of bloom events, which become an escalating threat to coastal ecosystems and cause substantial economic loss worldwide. Resting cyst production and broad temperature tolerance are well proven as adaptive strategies for blooming dinoflagellates; however, to date, the underlying molecular information is scarce. In the present study, we characterized two heat shock protein genes from the representative dinoflagellate Scrippsiella trochoidea, with the aim to primarily determine their possible roles in response to temperature stress and alteration of the life cycle. The yielded results enhance our knowledge about the functions of cross-talk of different Hsp members in temperature adaptation of dinoflagellates and facilitate further exploration in their potential physiological relevance during different life-stage alternation in this ecological important lineage. Abstract The small heat shock protein (sHsp) and Hsp40 are Hsp members that have not been intensively investigated but are functionally important in most organisms. In this study, the potential roles of a Hsp20 (StHsp20) and a Hsp40 (StHsp40) in dinoflagellates during adaptation to temperature fluctuation and alteration of different life stages were explored using the representative harmful algal blooms (HABs)-causative dinoflagellate species, Scrippsiella trochoidea. We isolated the full-length cDNAs of the two genes via rapid amplification of cDNA ends (RACE) and tracked their differential transcriptions via real-time qPCR. The results revealed StHsp20 and StHsp40 exhibited mRNA accumulation patterns that were highly similar in response to heat stress but completely different toward cold stress, which implies that the mechanisms underlying thermal and cold acclimation in dinoflagellates are regulated by different sets of genes. The StHsp20 was probably related to the heat tolerance of the species, and StHsp40 was closely involved in the adaptation to both higher and lower temperature fluctuations. Furthermore, significantly higher mRNA abundance of StHsp40 was detected in newly formed resting cysts, which might be a response to intrinsic stress stemmed from encystment. This finding also implied StHsp40 might be engaged in resting cyst formation of S. trochoidea. Our findings enriched the knowledge about possible cross-talk of different Hsp members in dinoflagellates and provided clues to further explore the molecular underpinnings underlying resting cyst production and broad temperature tolerance of this group of HABs contributors.
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Affiliation(s)
- Yunyan Deng
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (Y.D.); (Z.H.); (L.S.); (Z.C.)
- Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zhangxi Hu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (Y.D.); (Z.H.); (L.S.); (Z.C.)
- Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Lixia Shang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (Y.D.); (Z.H.); (L.S.); (Z.C.)
- Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zhaoyang Chai
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (Y.D.); (Z.H.); (L.S.); (Z.C.)
- Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Ying Zhong Tang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (Y.D.); (Z.H.); (L.S.); (Z.C.)
- Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
- Correspondence: ; Tel./Fax: +86-532-8289-6098
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Bao A, Ma A, Zhang H, Qiao L, Ben S, Zhou X, Zhang M. Inducible expression of heat shock protein 20 protects airway epithelial cells against oxidative injury involving the Nrf2-NQO-1 pathway. Cell Biosci 2020; 10:120. [PMID: 33088476 PMCID: PMC7574176 DOI: 10.1186/s13578-020-00483-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 10/10/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Heat shock protein (HSP) 20 is a molecular chaperone that exerts multiple protective functions in various kinds of tissues. However, the expression of HSP20 and its specific functions in airway epithelial cells (AECs) remain elusive. RESULTS In current study, we first confirmed the inducible expression of HSP20 in mouse AECs and in a human bronchial epithelial cell line BEAS-2B cells, under different oxidant stressors. Then by establishing a HSP20-abundant mouse model with repeated low-level-ozone exposures and stimulating this model with a single high-level ozone exposure, we found that the HSP20 abundance along with its enhanced phosphorylation potentially contributed to the alleviation of oxidative injuries, evidenced by the decreases in the bodyweight reduction, the BAL neutrophil accumulation, the AECs shedding, and the BAL concentrations of albumin and E-cadherin. The biological function of HSP20 and its molecular mechanisms were further investigated in BEAS-2B cells that were transfected with HSP20-, unphosphorylatable HSP20(Ala) or empty vector plasmids prior to the stimulation of H2O2, of which its oxidant capacity has been proved to be similar with those of ozone in an air-liquid culture system. We found that the H2O2-induced intracellular ROS level and the early cell apoptosis were attenuated in the HSP20- but not HSP20(Ala)- transfected cells. The intracellular expression of NQO-1 (mRNA and protein) and the intranuclear content of Nrf2 were significantly increased in the HSP20- transfected cells but not in the HSP20(Ala)- and empty vector-transfected cells after the stimulation of H2O2. CONCLUSIONS The inducible expression of HSP20 in AECs by oxidative stress exerts protective roles against oxidative damages, which may involve the activation of the Nrf2-NQO-1 pathway.
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Affiliation(s)
- Aihua Bao
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 100 Haining Road, Shanghai, 200080 China
| | - Aying Ma
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 100 Haining Road, Shanghai, 200080 China
| | - Hui Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Henan, China
| | - Lihua Qiao
- Department of Gynecology, The Fourth People’s Hospital of Shanghai, Tong Ji University, Shanghai, China
| | - Suqin Ben
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 100 Haining Road, Shanghai, 200080 China
| | - Xin Zhou
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 100 Haining Road, Shanghai, 200080 China
| | - Min Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 100 Haining Road, Shanghai, 200080 China
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Li XD, Yan T, Zhang QC, Yu RC, Zhou MJ. Inhibition to crucial enzymes in the lethal effects of the dinoflagellate Karenia mikimotoi on the rotifer Brachionus plicatilis. MARINE ENVIRONMENTAL RESEARCH 2020; 157:104866. [PMID: 32275503 DOI: 10.1016/j.marenvres.2019.104866] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/06/2019] [Accepted: 12/19/2019] [Indexed: 06/11/2023]
Abstract
Blooms of the dinoflagellate Karenia mikimotoi have cause great financial losses to the marine aquaculture industry. However, the toxicity mechanism of this species is still not fully known. In this study, we evaluated the short-term effects of K. mikimotoi on the rotifer Brachionus plicatilis by micro and sub micro observing and by measuring inhibition of crucial enzymes. Behaviour disorder, mucus production, corona and cilium damage, vesical production, and body shrinkage occurred within 1 h after rotifers were treated with K. mikimotoi at a density of 3 × 104 cells/mL. Enzyme activity assays showed that K. mikimotoi at low densities significantly inhibited multiple enzymes within 3 h, and obvious density-effect trends were also observed. For instance, activity of esterase and acetylcholinesterase of rotifers significantly decreased to 94.3/83.3% and 82.8/66.9% of control treatment values in 30 and 1000 cells/mL algal treatment, respectively. Total ATPase and Na+-K+-ATPase activities of rotifers also decreased to 82.3% and 68.6% of control values in 1000 cells/mL treatment. The LDH releasement test and MDA tests showed no significant difference between algae treatment and control. It suggested that K. mikimotoi might not cause significant cytolysis and oxidative damage to rotifers, but may cause mortality by inhibiting the activity of crucial enzymes, which may lead to cell permeability disorder and body shrinkage.
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Affiliation(s)
- Xiao-Dong Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China; Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China.
| | - Tian Yan
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China; Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China.
| | - Qing-Chun Zhang
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China; Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China
| | - Ren-Cheng Yu
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China; Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China
| | - Ming-Jiang Zhou
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China
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Vilchis-Landeros M, Guinzberg R, Riveros-Rosas H, Villalobos-Molina R, Piña E. Aquaporin 8 is involved in H 2 O 2 -mediated differential regulation of metabolic signaling by α 1 - and β-adrenoceptors in hepatocytes. FEBS Lett 2020; 594:1564-1576. [PMID: 32115689 DOI: 10.1002/1873-3468.13763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 01/16/2020] [Accepted: 02/12/2020] [Indexed: 12/20/2022]
Abstract
Reactive oxygen species participate in regulating intracellular signaling pathways. Herein, we investigated the reported opposite effects of hydrogen peroxide (H2 O2 ) on metabolic signaling mediated by activated α1 - and β-adrenoceptors (ARs) in hepatocytes. In isolated rat hepatocytes, stimulation of α1 -AR increases H2 O2 production via NADPH oxidase 2 (NOX2) activation. We find that the H2 O2 thus produced is essential for α1 -AR-mediated activation of the classical hepatic glycogenolytic, gluconeogenic, and ureagenic responses. However, H2 O2 inhibits β-AR-mediated activation of these metabolic responses. We show that H2 O2 mediates its effects on α1 -AR and β-AR by permeating cells through aquaporin 8 (AQP8) channels and promoting Ca2+ mobilization. Thus, our findings reveal a novel NOX2-H2 O2 -AQP8-Ca2+ signaling cascade acting downstream of α1 -AR in hepatocytes, which, by negatively regulating β-AR signaling, establishes negative crosstalk between the two pathways.
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Affiliation(s)
- Magdalena Vilchis-Landeros
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Raquel Guinzberg
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Héctor Riveros-Rosas
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Rafael Villalobos-Molina
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México.,Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, México
| | - Enrique Piña
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
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Li N, Arief N, Edmands S. Effects of oxidative stress on sex-specific gene expression in the copepod Tigriopus californicus revealed by single individual RNA-seq. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2019; 31:100608. [PMID: 31325755 DOI: 10.1016/j.cbd.2019.100608] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/08/2019] [Accepted: 07/08/2019] [Indexed: 12/16/2022]
Abstract
Oxidative stress reflects the imbalance of pro-oxidants and antioxidants. Prolonged oxidative stress can induce cellular damage, diseases and aging, and the effects may be sex-specific. Tigriopus californicus has recently been proposed as an alternative model system for sex-specific studies due to the absence of sex chromosomes. In this study, we used comparative transcriptomic analyses to assess sex-specific transcriptional responses to oxidative stress. Male and female individuals were maintained separately in one of three treatments: 1) control conditions with an algae diet, 2) pro-oxidant (H2O2) conditions with an algae diet or 3) decreased antioxidant conditions (reduced carotenoids due to a yeast diet). Single individual RNA-seq was then conducted for twenty-four libraries using Ligation Mediated RNA sequencing (LM-Seq). Variance in gene expression was partitioned into 62.3% between sexes, 26.85% among individuals and 10.85% among treatments. Within each of the three treatments, expression was biased toward females. However, compared to the control treatment, males in both pro-oxidant and decreased antioxidant treatments differentially expressed more genes while females differentially expressed fewer genes but with a greater magnitude of fold change. As the first study of copepods to apply single individual RNA-seq, the findings will contribute to a better understanding of transcriptomic variation among individuals as well as sex-specific response mechanisms to oxidative stress in the absence of sex chromosomes.
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Affiliation(s)
- Ning Li
- Department of Biological Sciences, University of Southern California, 3616 Trousdale Parkway, Los Angeles, CA 90089, USA.
| | - Natasha Arief
- Department of Biological Sciences, University of Southern California, 3616 Trousdale Parkway, Los Angeles, CA 90089, USA.
| | - Suzanne Edmands
- Department of Biological Sciences, University of Southern California, 3616 Trousdale Parkway, Los Angeles, CA 90089, USA.
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Xikeranmu Z, Abdunasir M, Ma J, Tusong K, Liu X. Characterization of two copper/zinc superoxide dismutases (Cu/Zn-SODs) from the desert beetle Microdera punctipennis and their activities in protecting E. coli cells against cold. Cryobiology 2019; 87:15-27. [DOI: 10.1016/j.cryobiol.2019.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 03/13/2019] [Accepted: 03/13/2019] [Indexed: 10/27/2022]
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Li P, Wang J, Zou Y, Sun Z, Zhang M, Geng Z, Xu W, Wang D. Interaction of Hsp90AA1 with phospholipids stabilizes membranes under stress conditions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:457-465. [DOI: 10.1016/j.bbamem.2018.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 11/19/2018] [Accepted: 11/26/2018] [Indexed: 01/29/2023]
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12
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Gang Y, Won EJ, Ra K, Choi JY, Lee KW, Kim K. Environmental assessment of contaminated marine sediments treated with solidification agents: Directions for improving environmental assessment guidelines. MARINE ENVIRONMENTAL RESEARCH 2018; 139:193-200. [PMID: 29804787 DOI: 10.1016/j.marenvres.2018.05.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/27/2018] [Accepted: 05/04/2018] [Indexed: 06/08/2023]
Abstract
Treatment of dredged materials is a critical issue, since management and disposal of these products requires considerable investment of monetary resources, time, and space. The high concentration of pollutants in dredged materials, along with high water content and many fine particles make recycling these materials particularly difficult. In order to solve this problem, solidification/stabilization has been considered as a potentially viable solution for recycling dredged marine sediments. However, there are currently no guidelines that address potential biological and environmental impacts. To evaluate the stability of treated materials and their biological impacts, dredged marine sediments, which were polluted with heavy metals, were treated by solidification/stabilization using two different solidifying agents. To assess potential impacts, toxicity characteristic leaching procedures (TCLP, USEPA) and a bioassay (with the rotifer, Brachionus sp.) were performed with treated materials. In a TCLP test, we found that treatment with a solidification agent decreased the leaching concentration of heavy metals from sediment compared to the control. The rotifer bioassay showed no change in the survival rate during 24 h of exposure to both agents. However, survival differed between the two agents after 48 h of exposure. Screening physiological status using gene expression, showed that oxidative stress genes were significantly altered. These results suggest that more studies are needed to provide guidelines for deciding the usability of treated materials created by the solidification or stabilization of dredged materials.
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Affiliation(s)
- Yehui Gang
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Eun-Ji Won
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; Department of Marine Science and Convergent Technology, Hanyang University, Ansan 15588, Republic of Korea.
| | - Kongtae Ra
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Jin Young Choi
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Kyun-Woo Lee
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Kyoungrean Kim
- Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Youngdo, Busan 49111, Republic of Korea; University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
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Ziv T, Chalifa-Caspi V, Denekamp N, Plaschkes I, Kierszniowska S, Blais I, Admon A, Lubzens E. Dormancy in Embryos: Insight from Hydrated Encysted Embryos of an Aquatic Invertebrate. Mol Cell Proteomics 2017; 16:1746-1769. [PMID: 28729386 DOI: 10.1074/mcp.ra117.000109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Indexed: 11/06/2022] Open
Abstract
Numerous aquatic invertebrates remain dormant for decades in a hydrated state as encysted embryos. In search for functional pathways associated with this form of dormancy, we used label-free quantitative proteomics to compare the proteomes of hydrated encysted dormant embryos (resting eggs; RE) with nondormant embryos (amictic eggs; AM) of the rotifer Brachionus plicatilisA total of 2631 proteins were identified in rotifer eggs. About 62% proteins showed higher abundance in AM relative to RE (Fold Change>3; p = 0.05). Proteins belonging to numerous putative functional pathways showed dramatic changes during dormancy. Most striking were changes in the mitochondria indicating an impeded metabolism. A comparison between the abundance of proteins and their corresponding transcript levels, revealed higher concordance for RE than for AM. Surprisingly, numerous highly abundant dormancy related proteins show corresponding high mRNA levels in metabolically inactive RE. As these mRNAs and proteins degrade at the time of exit from dormancy they may serve as a source of nucleotides and amino acids during the exit from dormancy. Because proteome analyses point to a similarity in functional pathways of hydrated RE and desiccated life forms, REs were dried. Similar hatching and reproductive rates were found for wet and dried REs, suggesting analogous pathways for long-term survival in wet or dry forms. Analysis by KEGG pathways revealed a few general strategies for dormancy, proposing an explanation for the low transcriptional similarity among dormancies across species, despite the resemblance in physiological phenotypes.
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Affiliation(s)
- Tamar Ziv
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Vered Chalifa-Caspi
- §National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Nadav Denekamp
- ¶Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Inbar Plaschkes
- §National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | | | - Idit Blais
- **Division of Reproductive Endocrinology and IVF, Department of Obstetrics and Gynecology, Carmel Medical Center, Haifa, Israel
| | - Arie Admon
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Esther Lubzens
- From the ‡Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel;
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Kim RO, Kim BM, Jeong CB, Lee JS, Rhee JS. Effects of chlorpyrifos on life cycle parameters, cytochrome P450S expression, and antioxidant systems in the monogonont rotifer Brachionus koreanus. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:1449-1457. [PMID: 26496856 DOI: 10.1002/etc.3288] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 09/25/2015] [Accepted: 10/21/2015] [Indexed: 06/05/2023]
Abstract
Chlorpyrifos is a widely used organophosphorus insecticide for controlling diverse insect pests of crops. In the monogonont rotifer Brachionus koreanus, population growth retardation with the inhibition of lifespan, fecundity, and individual body size of ovigerous females was shown over 10 d in response to chlorpyrifos exposure. At the molecular and biochemical levels, the rotifer B. koreanus defensome, composed of cytochrome P450 complements, heat shock protein 70, and antioxidant enzymatic systems (i.e., glutathione, glutathione peroxidase, glutathione reductase, and glutathione S-transferase), was significantly induced in response to different concentrations of chlorpyrifos. Thus, chlorpyrifos strongly induced a defensome system to mitigate the deleterious effects of chlorpyrifos at in vivo and in vitro levels as a trade-off in fitness costs. Environ Toxicol Chem 2016;35:1449-1457. © 2015 SETAC.
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Affiliation(s)
- Ryeo-Ok Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Bo-Mi Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
- Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Jae-Sung Rhee
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon, South Korea
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15
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Jiang X, Guan X, Yao L, Zhang H, Jin X, Han Y. Effects of Single and Joint Subacute Exposure of Copper and Cadmium on Heat Shock Proteins in Common Carp (Cyprinus carpio). Biol Trace Elem Res 2016; 169:374-81. [PMID: 26105544 DOI: 10.1007/s12011-015-0402-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 06/08/2015] [Indexed: 10/23/2022]
Abstract
Copper (Cu) and cadmium (Cd) are the most common heavy metals that are easily detected in aquatic environments on a global scale. In this paper, we investigated the messenger RNA (mRNA) and protein levels of HSPs (HSP60, HSP70, and HSP90) in the liver of the common carp exposed to Cu, Cd, and a combination of both metals by real-time quantitative PCR and Western blot. The results indicated that in each exposure group, the mRNA levels of HSP60, HSP70, and HSP90 were increased significantly compared to the corresponding controls after 96 h of exposure (P < 0.05). A significant increase was observed in the HSP70 protein level in the high-dose Cu group and all of the Cd groups. Significant increases were also observed in the protein levels of HSP60 and HSP90 in the high combination group and the low combination group, respectively. These results indicated that the dynamics of HSP expression observed in the common carp support the role of HSPs as biochemical markers in response to environmental pollution and provided valuable insights into the adaptive mechanisms used by the common carp to adapt to the challenges of stressful environments.
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Affiliation(s)
- Xuyang Jiang
- College of Animal Science and Technology, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, People's Republic of China
- National and Local Joint Freshwater Fish Breeding Engineering Laboratory of China, 43 Songfa Street, Harbin, 150030, People's Republic of China
| | - Xueting Guan
- College of Animal Science and Technology, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, People's Republic of China
| | - Linlin Yao
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, People's Republic of China
| | - Hong Zhang
- College of Animal Science and Technology, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, People's Republic of China
| | - Xian Jin
- Harbin Academy of Agricultural Sciences, 5399 Wanbao Street, Harbin, 150030, People's Republic of China.
| | - Ying Han
- College of Animal Science and Technology, Northeast Agricultural University, 59 Mucai Street, Harbin, 150030, People's Republic of China.
- National and Local Joint Freshwater Fish Breeding Engineering Laboratory of China, 43 Songfa Street, Harbin, 150030, People's Republic of China.
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Lee MA, Guo R, Ki JS. Different transcriptional responses of heat shock protein 20 in the marine diatom Ditylum brightwellii exposed to metals and endocrine-disrupting chemicals. ENVIRONMENTAL TOXICOLOGY 2014; 29:1379-1389. [PMID: 23661567 DOI: 10.1002/tox.21868] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 03/20/2013] [Accepted: 03/28/2013] [Indexed: 06/02/2023]
Abstract
Diatoms are sensitive indicators of water quality, and hence used for environmental hazard assessments; however, their toxicogenomic studies have been insufficiently attempted. In the present study, we determined the cDNA sequence of heat shock protein 20 (Hsp20) gene from the diatom Ditylum brightwellii, and examined the transcriptional responses of the gene after exposing it to environmental stressors such as thermal shock, metals, and endocrine-disrupting chemicals (EDCs). The open reading frame (ORF) of DbHsp20 was 531 bp long, encoding 177 amino acid residues (19.49 kDa) with a conserved C-terminal and α-crystallin domain. The genomic region of DbHsp20 did not contain introns. Phylogeny of eukaryotic Hsp20s showed D. brightwellii was closely related to other diatoms. With regard to the gene expressional profile, real-time PCR results showed that the gene was significantly upregulated (P < 0.001) under thermal stress, with the highest change of 3.2-fold. Metals' (copper and nickel) treatments showed that it was induced after a certain point of treated concentration. On the contrary, EDCs did not display noticeable change on the expression of DbHsp20. These results suggest that the diatom Hsp20 basically responds to thermal stress, but may differentially respond to toxic substances such as metals and organic compounds such as EDCs.
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Affiliation(s)
- Min-Ah Lee
- Department of Life Science, Sangmyung University, Seoul, 110-743, South Korea
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Snell TW, Johnston RK. Glycerol extends lifespan of Brachionus manjavacas (Rotifera) and protects against stressors. Exp Gerontol 2014; 57:47-56. [PMID: 24835191 DOI: 10.1016/j.exger.2014.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 05/03/2014] [Accepted: 05/05/2014] [Indexed: 01/18/2023]
Abstract
Diet has profound effects on animal longevity and manipulation of nutrient sensing pathways is one of the primary interventions capable of lifespan extension. This often is done through caloric restriction (CR) and a variety of CR mimics have been identified that produce life extending effects without adhering to the rigorous CR dietary regimen. Glycerol is a dietary supplement capable mimicking CR by shifting metabolism away from glycolysis and towards oxidative phosphorylation. Glycerol supplementation has a number of beneficial effects, including lifespan extension, improved stress resistance, and enhanced locomotory and mitochondria activity in older age classes. Using rotifers as a model, we show that supplements of 150-300mM glycerol produced 40-50% extension of mean lifespan. This effect was produced by raising glycerol concentration only three times higher than its baseline concentration in rotifer tissues. Glycerol supplementation decreased rotifer reliance on glycolysis and reduced the pro-aging effects of glucose. Glycerol also acted as a chemical chaperone, mitigating damage by protein aggregation. Glycerol treatment improved rotifer swimming performance in older age classes and maintained more mitochondrial activity. Glycerol treatment provided increased resistance to starvation, heat, oxidation, and osmotic stress, but not UV stress. When glycerol was co-administered with the hexokinase inhibitor 2-deoxyglucose, the lifespan extending effect of glycerol was enhanced. Co-administration of glycerol with inhibitors like 2-deoxyglucose can lower their efficacious doses, thereby reducing their toxic side effects.
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Affiliation(s)
- Terry W Snell
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA.
| | - Rachel K Johnston
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA
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Yang J, Mu Y, Dong S, Jiang Q, Yang J. Changes in the expression of four heat shock proteins during the aging process in Brachionus calyciflorus (rotifera). Cell Stress Chaperones 2014; 19:33-52. [PMID: 23620205 PMCID: PMC3857431 DOI: 10.1007/s12192-013-0432-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/09/2013] [Accepted: 04/11/2013] [Indexed: 12/29/2022] Open
Abstract
Heat shock proteins (HSPs) are molecular chaperones and have an important role in the refolding and degradation of misfolded proteins, and these functions are related to aging. Rotifer is a useful model organism in aging research, owing to small body size (0.1-1 mm), short lifespan (6-14 days), and senescence phenotypes that can be measured relatively easily. Therefore, we used rotifer as a model to determine the role of four typical hsp genes on the aging process in order to provide a better understanding of rotifer aging. We cloned cDNA encoding hsp genes (hsp40, hsp60, hsp70, and hsp90) from the rotifer Brachionus calyciflorus Pallas, analyzed their molecular characteristics, determined its modulatory response under different temperatures and H2O2 concentrations and investigated the changes in expression of these genes during the aging process. We found that Bchsp70 mRNA expression significantly decreased with aging. In addition, we also studied the effects of dietary restriction (DR) and vitamin E on rotifer lifespan and reproduction and analyzed the changes in expression of these four Bchsp genes in rotifers treated with DR and vitamin E. The results showed that DR extended the lifespan of rotifers and reduced their fecundity, whereas vitamin E had no significant effect on rotifer lifespan or reproduction. Real-time PCR indicated that DR increased the expression of these four Bchsps. However, vitamin E only improved the expression of Bchsp60, and reduced the expression of Bchsp40, Bchsp70, and Bchsp90. DR pretreatment also increased rotifer survival rate under paraquat-induced oxidative stress. These results indicated that hsp genes had an important role in the anti-aging process.
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Affiliation(s)
- Jianghua Yang
- />Jiangsu Province Key Laboratory for Biodiversity and Biotechnology and Jiangsu Province Key Laboratory for Aquatic Live Food, School of Biological Sciences, Nanjing Normal University, Nanjing, Jiangsu 210046 People’s Republic of China
| | - Yawen Mu
- />Institute of Life Sciences, Southeast University, Nanjing, Jiangsu 210046 People’s Republic of China
| | - Siming Dong
- />Jiangsu Province Key Laboratory for Biodiversity and Biotechnology and Jiangsu Province Key Laboratory for Aquatic Live Food, School of Biological Sciences, Nanjing Normal University, Nanjing, Jiangsu 210046 People’s Republic of China
| | - Qichen Jiang
- />Jiangsu Province Key Laboratory for Biodiversity and Biotechnology and Jiangsu Province Key Laboratory for Aquatic Live Food, School of Biological Sciences, Nanjing Normal University, Nanjing, Jiangsu 210046 People’s Republic of China
| | - Jiaxin Yang
- />Jiangsu Province Key Laboratory for Biodiversity and Biotechnology and Jiangsu Province Key Laboratory for Aquatic Live Food, School of Biological Sciences, Nanjing Normal University, Nanjing, Jiangsu 210046 People’s Republic of China
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Yang J, Dong S, Jiang Q, Si Q, Liu X, Yang J. Characterization and expression of cytoplasmic copper/zinc superoxide dismutase (CuZn SOD) gene under temperature and hydrogen peroxide (H2O2) in rotifer Brachionus calyciflorus. Gene 2013; 518:388-96. [DOI: 10.1016/j.gene.2012.12.101] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 12/24/2012] [Accepted: 12/26/2012] [Indexed: 11/26/2022]
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20
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Snell TW, Fields AM, Johnston RK. Antioxidants can extend lifespan of Brachionus manjavacas (Rotifera), but only in a few combinations. Biogerontology 2012; 13:261-75. [PMID: 22270335 DOI: 10.1007/s10522-012-9371-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 01/04/2012] [Indexed: 12/21/2022]
Abstract
Animal cells are protected from oxidative damage by an antioxidant network operating as a coordinated system, with strong synergistic interactions. Lifespan studies with whole animals are expensive and laborious, so there has been little investigation of which antioxidant interactions might be useful for life extension. Animals in the phylum Rotifera are particularly promising models for aging studies because they are small (0.1-1 mm), have short, two-week lifespan, display typical patterns of animal aging, and have well characterized, easy to measure phenotypes of aging and senescence. One class of interventions that has consistently produced significant rotifer life extension is antioxidants. Although the mechanism of antioxidant effects on animal aging remains controversial, the ability of some antioxidant supplements to extend rotifer lifespan was unequivocal. We found that exposing rotifers to certain combinations of antioxidant supplements can produce up to about 20% longer lifespan, but that most antioxidants have no effect. We performed life table tests with 20 single antioxidants and none yielded significant rotifer life extension. We tested 60 two-way combinations of selected antioxidants and only seven (12%) produced significant rotifer life extension. None of the 20 three- and four-way antioxidant combinations tested yielded significant rotifer life extension. These observations suggest that dietary exposure of antioxidants can extend rotifer lifespan, but most antioxidants do not. We observed significant rotifer life extension only when antioxidants were paired with trolox, N-acetyl cysteine, L: -carnosine, or EUK-8. This illustrates that antioxidant treatments capable of rotifer life extension are patchily distributed in the parameter space, so large regions must be searched to find them. It furthermore underscores the value of the rotifer model to conduct rapid, facile life table experiments with many treatments, which makes such a search feasible. Although some antioxidants extended rotifer lifespan, they likely did so by another mechanism than direct antioxidation.
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Affiliation(s)
- Terry W Snell
- School of Biology, Georgia Institute of Technology, Atlanta, 30332-0230, USA.
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