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Kim JH, Sohn S, Kim SK, Kim SR, Kim SK, Kim SM, Kim NY, Hur YB. Effects on the survival rates, hematological parameters, and neurotransmitters in olive flounders, Paralichthys olivaceus, reared in bio-floc and seawater by Streptococcus iniae challenge. Fish Shellfish Immunol 2021; 113:79-85. [PMID: 33812989 DOI: 10.1016/j.fsi.2021.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 12/19/2020] [Revised: 01/31/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
Bacterial infections cause huge losses to aquaculture globally, and increased antibiotic resistance means that alternative methods of reducing mortality from bacterial diseases are required. We compared the resistance of Juvenile olive flounders, Paralichthys olivaceus, to Streptococcus iniae between those reared in biofloc and seawater conditions for ten months. Experimental fish were challenged with S. iniae at concentrations of 0, 3.36 × 106, 3.36 × 107, 3.36 × 108, and 3.36 × 109 colony forming units (CFU)/g fish for 96 h to evaluate the difference in S. iniae susceptibility of flounders reared in biofloc and seawater. The 96 h lethal concentration 50% (LC50) of fish injected with S. iniae was 2.41 × 109 CFU/g fish in biofloc and 1.51 × 108 CFU/g fish in seawater. Hematological parameters such as hemoglobin and hematocrit significantly decreased when fish were challenged by S. iniae. Plasma components such as calcium, glucose, cholesterol, total protein, GOT, GPT, and ALP were significantly altered by S. iniae infection and acetylcholinesterase activity was significantly inhibited. These results indicate that S. iniae infection affects the survival rates, hematological parameters, and neurotransmitter levels of flounders reared in biofloc and seawater, and that S. iniae susceptibility was higher in flounders reared in seawater than those reared in biofloc.
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Affiliation(s)
- Jun-Hwan Kim
- Sun Moon University, Department of Aquatic Life and Medical Science, Asan-si, South Korea.
| | - Saebom Sohn
- National Institute of Fisheries Science, East Sea Fisheries Research Institute, Fisheries Research & Devlopment, Gangneung, Gangwon-do 25435, South Korea
| | - Su Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Seok-Ryel Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Su-Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Su Mi Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Na Young Kim
- Pathology Research Division, National Institute of Fisheries Science, Busan 46083, South Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
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Kim JH, Jeong EH, Jeon YH, Kim SK, Hur YB. Salinity-mediated changes in hematological parameters, stress, antioxidant responses, and acetylcholinesterase of juvenile olive flounders (Paralichthys olivaceus). Environ Toxicol Pharmacol 2021; 83:103597. [PMID: 33493675 DOI: 10.1016/j.etap.2021.103597] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 10/23/2020] [Revised: 01/05/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
The purpose of this study was to confirm the limit of salinity tolerance in juvenile olive flounders (Paralichthys olivaceus) by changes in blood parameters, AChE, antioxidant and stress responses. The P. olivaceus (mean weight 38.8 ± 4.2 g and mean length 16.4 ± 1.2 cm) were exposed to different concentrations of salinity (seawater, 16, 8, 4, 2, and 0 psu) for 2 weeks. Plasma osmotic pressure was significantly decreased in the P. olivaceus at 0 psu. Hematological parameters such as hematocrit and hemoglobin were significantly decreased in the P. olivaceus at low salinity. Plasma components also changed significantly in the low salinity environment. As a stress indicator, cortisol was significantly increased at low salinity. SOD and GST antioxidant responses, were significantly increased. GSH level in the liver was significantly increased, whereas a significant decrease was observed in the gill GSH level. AChE was significantly increased in P. olivaceus at low salinity. The results of this study indicate that exposure to salinities lower than 8 psu leads to changes in hematological parameters, neurotransmitter, antioxidant and stress responses of P. olivaceus.
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Affiliation(s)
- Jun-Hwan Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Development, Taean 32132, Republic of Korea; Department of Aquatic Life and Medical Science, Sun Moon University, Asan 31460, Republic of Korea.
| | - Eun-Ha Jeong
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Development, Taean 32132, Republic of Korea
| | - Yu-Hyeon Jeon
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Development, Taean 32132, Republic of Korea
| | - Su Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Development, Taean 32132, Republic of Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Development, Taean 32132, Republic of Korea
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Kim JH, Cho JH, Kim SR, Hur YB. Toxic effects of waterborne ammonia exposure on hematological parameters, oxidative stress and stress indicators of juvenile hybrid grouper, Epinephelus lanceolatus ♂ × Epinephelus fuscoguttatus ♀. Environ Toxicol Pharmacol 2020; 80:103453. [PMID: 32629076 DOI: 10.1016/j.etap.2020.103453] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 04/06/2020] [Revised: 06/29/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Juvenile hybrid grouper, Epinephelus lanceolatus ♂ × Epinephelus fuscoguttatus ♀ (mean weight: 26.5 ± 2.8 g, mean length: 11.8 ± 1.3 cm) were exposed to different, sub-lethal levels of waterborne ammonia (0, 1, 2, 4, and 8 mg NH4+/L) for 2 weeks. We assessed the hematological parameters, antioxidant enzymes, and stress responses of juvenile hybrid grouper after 1 week and after 2 weeks. Hematological parameters such as hemoglobin and hematocrit levels, were significantly decreased by ammonia exposure. Plasma components such as the magnesium and total protein contents, and the glutamic oxaloacetic transaminase and glutamic pyruvic transaminase activities were significantly altered by ammonia exposure; however, no changes in the magnesium levels were detected. Antioxidant responses, such as superoxide dismutase and glutathione S-transferase activities, were also significantly affected by ammonia exposure. Stress indicator levels, i.e., plasma cholesterol and heat shock protein 70 levels, were significantly increased by ammonia exposure. The results of this study indicated that ammonia exposure has toxic effects on juvenile hybrid grouper and affects their hematological parameters, antioxidant enzymes, and stress responses.
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Affiliation(s)
- Jun-Hwan Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea.
| | - Jae-Hwang Cho
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Seok-Ryel Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean 32132, South Korea
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Kim JH, Sohn S, Kim SK, Hur YB. Effects on hematological parameters, antioxidant and immune responses, AChE, and stress indicators of olive flounders, Paralichthys olivaceus, raised in bio-floc and seawater challenged by Edwardsiella tarda. Fish Shellfish Immunol 2020; 97:194-203. [PMID: 31830567 DOI: 10.1016/j.fsi.2019.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 10/14/2019] [Revised: 11/21/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
Studies on the resistance of fish raised in bio-floc systems against bacterial infection are limited. We aimed to evaluate the changes in hematological parameters, antioxidant and immune responses, stress indicators, and acetylcholinesterase (AChE) in olive flounder, Paralichthys olivaceus, raised in bio-floc and seawater for 10 months and, then, infected with Edwardsiella tarda at concentrations of 0 (control), 6.61 × 104, 6.61 × 105, 6.61 × 106, and 6.61 × 107 CFU/g fish for 7 days. The lethal concentration 50% was 4.32 × 107 in bio-floc and 3.11 × 106 in seawater. Hematological parameters were significantly decreased by E. tarda challenge, and plasma components were significantly changed. The superoxide dismutase, catalase, and glutathione-S-transferase activities, as antioxidant responses, were significantly increased after infection, whereas the reduced glutathione level was significantly decreased. The lysozyme activity was significantly increased and the AChE level was significantly decreased after infection. Cortisol and HSP 70, as stress indicators, were also significantly increased. The results indicate that E. tarda infection affected various physiological factors in P. olivaceus. Additionally, P. olivaceus raised in seawater were more susceptible to E. tarda infection than those raised in bio-floc.
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Affiliation(s)
- Jun-Hwan Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea.
| | - Saebom Sohn
- National Institute of Fisheries Science, East Sea Fisheries Research Institute, Fisheries Research & Devlopment, Gangneung, Gangwon-do, 25435, South Korea
| | - Su Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
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Kim JH, Kim SK, Hur YB. Toxic effects of waterborne nitrite exposure on antioxidant responses, acetylcholinesterase inhibition, and immune responses in olive flounders, Paralichthys olivaceus, reared in bio-floc and seawater. Fish Shellfish Immunol 2020; 97:581-586. [PMID: 31866446 DOI: 10.1016/j.fsi.2019.12.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 10/14/2019] [Revised: 11/21/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
Paralichthys olivaceus (mean weight, 280.1 ± 10.5 g; mean length, 28.37 ± 2.3 cm) was reared in bio-floc and seawater for 6 months to determine the toxic effects of waterborne nitrite exposure (0, 25, 50, 100, and 200 mg/L) for 1 week, compared to those observed with bio-floc and seawater only. The effects on antioxidant activity, immune responses, and acetylcholinesterase activity were measured. Following nitrite exposure, superoxide dismutase activity in the liver and gills was significantly elevated and catalase activity was significantly increased, except for in the gills of P. olivaceus reared in bio-floc. Further, glutathione S-transferase activity was significantly elevated in the liver and gills, and glutathione was significantly lower. Meanwhile, acetylcholinesterase activity in the liver and gills was significantly inhibited and plasma lysozyme activity and immunoglobulin M were considerably elevated.
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Affiliation(s)
- Jun-Hwan Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea.
| | - Su Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
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Kim JH, Kim SK, Hur YB. Hematological parameters and antioxidant responses in olive flounder Paralichthys olivaceus in biofloc depend on water temperature. J Therm Biol 2019; 82:206-212. [DOI: 10.1016/j.jtherbio.2019.04.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/15/2019] [Accepted: 04/20/2019] [Indexed: 11/30/2022]
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Kim JH, Kim JY, Lim LJ, Kim SK, Choi HS, Hur YB. Effects of waterborne nitrite on hematological parameters and stress indicators in olive flounders, Paralichthys olivaceus, raised in bio-floc and seawater. Chemosphere 2018; 209:28-34. [PMID: 29913396 DOI: 10.1016/j.chemosphere.2018.06.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 05/11/2018] [Revised: 06/09/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Juvenile olive flounders, Paralichthys olivaceus (mean weight 2.69 ± 0.31 g), were raised in bio-floc and seawater for six months, these P. olivaceus (mean weight 280.1 ± 10.5 g, mean length 28.37 ± 2.3 cm) were exposed to different concentrations of waterborne nitrite (0, 25, 50, 100, and 200 mg NO2-/L) for 7 days. None of the P. olivaceus individuals exposed to bio-floc and seawater containing waterborne nitrite concentrations of 200 mg/L for 7 days survived. Hematological parameters (hemoglobin and hematocrit) were significantly reduced by nitrite exposure. Regarding plasma components, the concentrations of glucose, glutamic oxalate transaminase (GOT), and glutamic pyruvate transaminase (GPT) increased significantly in response to nitrite exposure, whereas cholesterol concentrations significantly decreased. Stress indicators, including concentrations of plasma glucose, cortisol, and liver and gill concentrations of heat shock protein 70 (HSP70) were significantly increased by nitrite exposure. The results of the study indicate that nitrite exposure affected the hematological parameters and stress indicators of P. olivaceus raised in bio-floc and seawater, and these changes were more prominent in the P. olivaceus raised in seawater than those raised in bio-floc.
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Affiliation(s)
- Jun-Hwan Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea.
| | - Jin-Young Kim
- Sun Moon University, Department of Aquatic Life and Medical Science, Asan-si, South Korea
| | - Lok-Ji Lim
- Sun Moon University, Department of Aquatic Life and Medical Science, Asan-si, South Korea
| | - Su Kyoung Kim
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
| | - Hye Sung Choi
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
| | - Young Baek Hur
- National Institute of Fisheries Science, West Sea Fisheries Research Institute, Fisheries Research & Devlopment, Taean, 32132, South Korea
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Kim HJ, Lee JH, Hur YB, Lee CW, Park SH, Koo BW. Marine Antifreeze Proteins: Structure, Function, and Application to Cryopreservation as a Potential Cryoprotectant. Mar Drugs 2017; 15:md15020027. [PMID: 28134801 PMCID: PMC5334608 DOI: 10.3390/md15020027] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 01/20/2017] [Indexed: 11/16/2022] Open
Abstract
Antifreeze proteins (AFPs) are biological antifreezes with unique properties, including thermal hysteresis(TH),ice recrystallization inhibition(IRI),and interaction with membranes and/or membrane proteins. These properties have been utilized in the preservation of biological samples at low temperatures. Here, we review the structure and function of marine-derived AFPs, including moderately active fish AFPs and hyperactive polar AFPs. We also survey previous and current reports of cryopreservation using AFPs. Cryopreserved biological samples are relatively diverse ranging from diatoms and reproductive cells to embryos and organs. Cryopreserved biological samples mainly originate from mammals. Most cryopreservation trials using marine-derived AFPs have demonstrated that addition of AFPs can improve post-thaw viability regardless of freezing method (slow-freezing or vitrification), storage temperature, and types of biological sample type.
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Affiliation(s)
- Hak Jun Kim
- Department of Chemistry, Pukyong National University, Busan 48513, Korea.
| | - Jun Hyuck Lee
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea.
| | - Young Baek Hur
- Tidal Flat Research Institute, National Fisheries Research and Development Institute, Gunsan, Jeonbuk 54014, Korea.
| | - Chang Woo Lee
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea.
| | - Sun-Ha Park
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea.
| | - Bon-Won Koo
- Department of Chemistry, Pukyong National University, Busan 48513, Korea.
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Nugroho WSK, Kim DW, Han JC, Hur YB, Nam SW, Kim HJ. Cloning, Expression, and Characterization of a Cold-Adapted Shikimate Kinase from the Psychrophilic Bacterium Colwellia psychrerythraea 34H. J Microbiol Biotechnol 2016; 26:2087-2097. [DOI: 10.4014/jmb.1608.08049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Kim HJ, Shim HE, Lee JH, Kang YC, Hur YB. Ice-Binding Protein Derived from Glaciozyma Can Improve the Viability of Cryopreserved Mammalian Cells. J Microbiol Biotechnol 2016; 25:1989-96. [PMID: 26323271 DOI: 10.4014/jmb.1507.07041] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Ice-binding proteins (IBPs) can inhibit ice recrystallization (IR), a major cause of cell death during cryopreservation. IBPs are hypothesized to improve cell viability after cryopreservation by alleviating the cryoinjury caused by IR. In our previous studies, we showed that supplementation of the freezing medium with the recombinant IBP of the Arctic yeast Glaciozyma sp. (designated as LeIBP) could reduce post-thaw hemolysis of human red blood cells and increase the survival of cryopreserved diatoms. Here, we showed that LeIBP could improve the viability of cryopreserved mammalian cells. Human cervical cancer cells (HeLa), mouse fibroblasts (NIH/3T3), human preosteoblasts (MC3T3-E1), Chinese hamster ovary cells (CHO-K1), and human keratinocytes (HaCaT) were evaluated. These mammalian cells were frozen in dimethyl sulfoxide (DMSO)/fetal bovine serum (FBS) solution with or without 0.1 mg/ml LeIBP at a cooling rate of -1°C/min in a -80°C freezer overnight. The minimum effective concentration (0.1 mg/ml) of LeIBP was determined, based on the viability of HeLa cells after treatment with LeIBP during cryopreservation and the IR inhibition assay results. The post-thaw viability of mammalian cells was examined. In all cases, cell viability was significantly enhanced by more than 10% by LeIBP supplementation in 5% DMSO/5% FBS: viability increased by 20% for HeLa cells, 28% for NIH/3T3 cells, 21% for MC3T3-E1, 10% for CHO-K1, and 20% for HaCaT. Furthermore, addition of LeIBP reduced the concentrations of toxic DMSO and FBS down to 5%. Therefore, we demonstrated that LeIBP can increase the viability of cryopreserved mammalian cells by inhibiting IR.
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Affiliation(s)
- Hak Jun Kim
- Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Hye Eun Shim
- Next-Generation Pharmaceutical Research Center, Korea Institute of Toxicology, Daejeon 34114, Republic of Korea
| | - Jun Hyuck Lee
- Division of Polar Biology, Korea Polar Research Institute, Incheon 21990, Republic of Korea
| | - Yong-Cheol Kang
- Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Young Baek Hur
- Southeast Sea Fisheries Research Institute, National Fisheries Research and Development Institute, Namhae 52440, Republic of Korea
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An HS, Kim WJ, Lim HJ, Byun SG, Hur YB, Park JY, Myeong JI, An CM. Genetic structure and diversity of Crassostrea gigas in Korea revealed from microsatellite markers. BIOCHEM SYST ECOL 2014. [DOI: 10.1016/j.bse.2014.03.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hwang JY, Park JJ, Yu HJ, Hur YB, Arzul I, Couraleau Y, Park MA. Ostreid herpesvirus 1 infection in farmed Pacific oyster larvae Crassostrea gigas (Thunberg) in Korea. J Fish Dis 2013; 36:969-972. [PMID: 23957681 DOI: 10.1111/jfd.12093] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 01/08/2013] [Accepted: 01/08/2013] [Indexed: 06/02/2023]
Affiliation(s)
- J Y Hwang
- Fish Pathology Division, National Fisheries Research and Development Institute (NFRDI), Busan, Korea
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Kim YO, Park S, Nam BH, Kang SJ, Hur YB, Lee SJ, Oh TK, Yoon JH. Ruegeria halocynthiae sp. nov., isolated from the sea squirt Halocynthia roretzi. Int J Syst Evol Microbiol 2012; 62:925-930. [DOI: 10.1099/ijs.0.031609-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-negative, non-motile, rod-shaped bacterial strain, designated MA1-6T, was isolated from a sea squirt (Halocynthia roretzi) collected from the South Sea, Korea, and was characterized to determine its taxonomic position. Strain MA1-6T grew optimally at pH 7.0–8.0, at 30 °C and in the presence of 2–3 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain MA1-6T fell within the clade comprising
Ruegeria
species and exhibited 95.3–96.5 % similarity to the type strains of recognized
Ruegeria
species. Strain MA1-6T contained Q-10 as the predominant ubiquinone and C18 : 1ω7c as the major fatty acid, which is consistent with data for
Ruegeria
species. The major polar lipids detected in strain MA1-6T and
Ruegeria atlantica
KCTC 12424T were phosphatidylcholine, phosphatidylglycerol, an unidentified aminolipid and an unidentified lipid. The DNA G+C content of strain MA1-6T was 58.6 mol%. Differential phenotypic properties, together with phylogenetic distinctiveness, demonstrated that strain MA1-6T can be distinguished from recognized
Ruegeria
species. On the basis of phenotypic, chemotaxonomic and phylogenetic data, strain MA1-6T is considered to represent a novel species of the genus
Ruegeria
, for which the name Ruegeria halocynthiae sp. nov. is proposed; the type strain is MA1-6T ( = KCTC 23463T = CCUG 60744T).
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Affiliation(s)
- Young-Ok Kim
- Biotechnology Research Division, National Fisheries Research and Development Institute (NFRDI), Gijang, Busan 619-705, Republic of Korea
| | - Sooyeon Park
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejeon, Republic of Korea
| | - Bo-Hye Nam
- Biotechnology Research Division, National Fisheries Research and Development Institute (NFRDI), Gijang, Busan 619-705, Republic of Korea
| | - So-Jung Kang
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejeon, Republic of Korea
| | - Young Baek Hur
- South East Sea Fisheries Research Institute, Tongyoung 650-943, Republic of Korea
| | - Sang-Jun Lee
- Biotechnology Research Division, National Fisheries Research and Development Institute (NFRDI), Gijang, Busan 619-705, Republic of Korea
| | - Tae-Kwang Oh
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejeon, Republic of Korea
| | - Jung-Hoon Yoon
- Department of Food Science and Biotechnology, Sungkyunkwan University, Jangan-gu, Suwon, Republic of Korea
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Jeong JE, Kang SW, Shin YK, Jun JC, Kim YO, Hur YB, Kim JH, Chae SH, Lee JS, Choi IH, Han YS, Seog DH, Lee YS. Comparative analysis of expressed sequence tags (ESTs) between normal group and softness syndrome group in Halocynthia roretzi. Mol Cell Toxicol 2011. [DOI: 10.1007/s13273-011-0045-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Choi HJ, Hwang JY, Choi DL, Huh MD, Hur YB, Lee NS, Seo JS, Kwon MG, Choi HS, Park MA. Non-specific defensive factors of the Pacific oyster Crassostrea gigas against infection with Marteilioides chungmuensis: a flow-cytometric study. Korean J Parasitol 2011; 49:229-34. [PMID: 22072822 PMCID: PMC3210839 DOI: 10.3347/kjp.2011.49.3.229] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/08/2011] [Accepted: 06/17/2011] [Indexed: 11/30/2022]
Abstract
In order to assess changes in the activity of immunecompetency present in Crassostrea gigas infected with Marteilioides chungmuensis (Protozoa), the total hemocyte counts (THC), hemocyte populations, hemocyte viability, and phagocytosis rate were measured in oysters using flow cytometry. THC were increased significantly in oysters infected with M. chungmuensis relative to the healthy appearing oysters (HAO) (P<0.05). Among the total hemocyte composition, granulocyte levels were significantly increased in infected oysters as compared with HAO (P<0.05). In addition, the hyalinocyte was reduced significantly (P<0.05). The hemocyte viability did not differ between infected oysters and HAO. However, the phagocytosis rate was significantly higher in infected oysters relative to HAO (P<0.05). The measurement of alterations in the activity of immunecompetency in oysters, which was conducted via flow cytometry in this study, might be a useful biomarker of the defense system for evaluating the effects of ovarian parasites of C. gigas.
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Affiliation(s)
- Hee Jung Choi
- Pathology Division, National Fisheries Research and Development Institute, Busan 619-705, Korea
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Kim YO, Cho HK, Park EM, Nam BH, Hur YB, Lee SJ, Cheong J. Generation of expressed sequence tags for immune gene discovery and marker development in the sea squirt, Halocynthia roretzi. J Microbiol Biotechnol 2008; 18:1510-1517. [PMID: 18852505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Expresssed sequence tag (EST) analysis was developed from three cDNA libraries constructed from cells of the digestive tract, gonad, and liver of sea squirt. Randomly selected cDNA clones were partially sequenced to generate a total of 922 ESTs, in which 687 unique ESTs were identified respectively. Results of BLASTX search showed that 612 ESTs (89%) have homology to genes of known function whereas 75 ESTs (11%) were unidentified or novel. Based on the major function of their encoded proteins, the identified clones were classified into ten broad categories. We also identified several kinds of immune-related genes as identifying novel genes. Sequence analysis of ESTs revealed the presence of microsatellite-containing genes that may be valuable for further gene mapping studies. The accumulation of a large number of identified cDNA clones is invaluable for the study of sea squirt genetics and developmental biology. Further studies using cDNA microarrays are needed to identify the differentially expressed transcripts after disease infection.
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Affiliation(s)
- Young-Ok Kim
- Biotechnology Research Institute, National Fisheries Research and Development Institute, Busan 619-902, Korea.
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Cho HK, Nam BH, Kong HJ, Han HS, Hur YB, Choi TJ, Choi YH, Kim WJ, Cheong J. Identification of softness syndrome-associated candidate genes and DNA sequence variation in the sea squirt, Halocynthia roretzi. Mar Biotechnol (NY) 2008; 10:447-456. [PMID: 18347870 DOI: 10.1007/s10126-008-9084-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 12/31/2007] [Accepted: 01/03/2008] [Indexed: 05/26/2023]
Abstract
The mortality of sea squirts, Halocynthia roretzi, with softness syndrome threatens the sea squirt aquaculture industry in Asian countries. The molecular approach to understanding the pathogenesis of softness syndrome began with differential gene expression analysis of tissues from normal and dying organisms. In the present study, we show that the expression of Halocynthia roretzi metalloproteinase (HrMMP) was significantly upregulated in the tissues of dying organisms through screening of differentially expressed genes, reverse transcription-polymerase chain reaction (RT-PCR), and real-time PCR. HrMMP is composed of 482 amino acids, contains a conserved domain found in the astacin family, and has typical metalloproteinase activity. To discriminate between the differential expression of the HrMMP gene in normal and dying organisms, we cloned the HrMMP gene promoter and identified a polymorphism in the HrMMP promoter region that resulted in distinct polymorphisms (G/T) at position - 308 bp. These results suggest that organisms with the GT genotype may have more resistance to softness syndrome than those with the TT genotype. These findings suggest that the HrMMP promoter polymorphism may be associated with an increased risk of softness syndrome in cultivated sea squirts and should be evaluated as a candidate molecular marker for the selective breeding of softness syndrome-resistant sea squirts.
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Affiliation(s)
- Hyun Kook Cho
- Department of Molecular Biology, Pusan National University, Busan, Korea
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