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Spinsante C, Carducci F, Carotti E, Canapa A, Bizzaro D, Biscotti MA, Barucca M. A bioinformatic approach to characterize the vitellogenin receptor and the low density lipoprotein receptor superfamily in the newt Cynops orientalis. Sci Rep 2025; 15:3403. [PMID: 39870874 PMCID: PMC11772764 DOI: 10.1038/s41598-025-88011-6] [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: 07/16/2024] [Accepted: 01/23/2025] [Indexed: 01/29/2025] Open
Abstract
The Low Density Lipoprotein receptors (LDLRs) gene family includes 15 receptors: very low-density lipoprotein receptor (VLDLR), LDLR, Sorting-related receptor with A-type repeats (SORLA), and 12 LDL receptor-related proteins (LRPs): LRP1, LRP1B, LRP2, LRP3, LRP4, LRP5, LRP6, LRP8, LRP10, LRP11, LRP12, LRP13. Most of these are involved in the transduction of key signals during embryonic development and in the regulation of cholesterol homeostasis. In oviparous animals, the VLDL receptor is also known as VTGR since it facilitates the uptake of vitellogenin in ovary. In tetrapods, information concerning genes encoding these proteins is limited to a few taxa. Here, we report the characterization of VTGR in the amphibian Cynops orientalis. The secondary structure analyses and the expression profiles obtained from hepatic and gonadal tissues of C. orientalis supported the role of VTGR as vitellogenin oocyte membrane receptor in this species. Moreover, to get a holistic view of the evolutionary history of this gene superfamily, we extended our investigation to all 15 genes belonging to the LDLR superfamily analyzing through a phylogenetic analysis a total of 161 sequences belonging to 11 genera of vertebrates. The position of LRP8 in the tree and its expression findings in C. orientalis ovary allowed us to suggest that other proteins of the LDLR superfamily could act as receptors during vitellogenesis.
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Affiliation(s)
- Chiara Spinsante
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Federica Carducci
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Elisa Carotti
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Adriana Canapa
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Davide Bizzaro
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Maria Assunta Biscotti
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy.
| | - Marco Barucca
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy
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Zhang X, Qiao K, Cui R, Xu M, Cai S, Huang Q, Liu Z. Tetrodotoxin: The State-of-the-Art Progress in Characterization, Detection, Biosynthesis, and Transport Enrichment. Mar Drugs 2024; 22:531. [PMID: 39728106 DOI: 10.3390/md22120531] [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: 10/17/2024] [Revised: 11/21/2024] [Accepted: 11/21/2024] [Indexed: 12/28/2024] Open
Abstract
Tetrodotoxin (TTX) is a neurotoxin that binds to sodium channels and blocks sodium conduction. Importantly, TTX has been increasingly detected in edible aquatic organisms. Because of this and the lack of specific antidotes, TTX poisoning is now a major threat to public health. However, it is of note that ultra-low dose TTX is an excellent analgesic with great medicinal value. These contradictory effects highlight the need for further research to elucidate the impacts and functional mechanisms of TTX. This review summarizes the latest research progress in relation to TTX sources, analogs, mechanisms of action, detection methods, poisoning symptoms, therapeutic options, biosynthesis pathways, and mechanisms of transport and accumulation in pufferfish. This review also provides a theoretical basis for reducing the poisoning risks associated with TTX and for establishing an effective system for its use and management to ensure the safety of fisheries and human health.
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Affiliation(s)
- Xinxin Zhang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Kun Qiao
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing, Xiamen 361021, China
| | - Ruimin Cui
- College of Food Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China
| | - Min Xu
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing, Xiamen 361021, China
| | - Shuilin Cai
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing, Xiamen 361021, China
| | - Qilin Huang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhiyu Liu
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, National Research and Development Center for Marine Fish Processing, Xiamen 361021, China
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3
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Ozogul F, Rathod N, Köse S, Alak G, Kızılyıldırım S, Bilgin Ş, Emir Çoban Ö, İnanlı AG, Ünal-Şengör GF, İzci L, Ozogul Y, Tokur B, Ucak İ, Ceylan Z, Kulawik P. Biochemical and microbial food safety hazards in seafood: A Mediterranean perspective (Part 2). ADVANCES IN FOOD AND NUTRITION RESEARCH 2024; 114:209-271. [PMID: 40155085 DOI: 10.1016/bs.afnr.2024.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/01/2025]
Abstract
The marine environment is teeming with a diverse array of algae, dinoflagellates and phytoplankton. These organisms possess the remarkable capacity to produce toxic compounds that can be passed to humans through the ingestion of seafood, resulting in potential health risks. Similarly, seafood can be susceptible to contamination from various microorganisms, viruses and parasites, thereby, potentially compromising food safety. Consuming seafood that contains toxins or pathogenic microorganisms may have serious health consequences, including the potential for severe illness or even fatality. This chapter delves into the various hazards that arise from biochemical and microbiological factors, with particular emphasis on the Mediterranean region. In addition, it provides a succinct analysis regarding the effect of COVID-19 pandemic on the safety of seafood.
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Affiliation(s)
- Fatih Ozogul
- Department of Seafood Processing Technology, Faculty of Fisheries, Çukurova University, Adana, Türkiye; Biotechnology Research and Application Center, Çukurova University, Adana, Türkiye.
| | - Nikheel Rathod
- Department of Post Harvest Management of Meat, Poultry and Fish, Post Graduate Institute of Post Harvest Technology and Management (Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth), Raigad, Maharashtra, India.
| | - Sevim Köse
- Department of Fisheries Technology Engineering, Faculty of Marine Sciences, Karadeniz Technical University, Çamburnu, Trabzon, Türkiye
| | - Gonca Alak
- Department of Seafood Processing Technology, Faculty of Fisheries, Ataturk University, Erzurum, Türkiye
| | - Suna Kızılyıldırım
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Çukurova University, Adana, Türkiye
| | - Şengül Bilgin
- Eğirdir Fisheries Faculty, Isparta University of Applied Sciences, Isparta, Türkiye
| | - Özlem Emir Çoban
- Department of Seafood Processing Technology, Faculty of Fisheries, Fırat University, Elazığ, Türkiye
| | - Ayşe Gürel İnanlı
- Department of Seafood Processing Technology, Faculty of Fisheries, Fırat University, Elazığ, Türkiye
| | - Gülgün F Ünal-Şengör
- Division of Food Safety, Department of Fisheries and Seafood Processing Technology, Faculty of Aquatic Sciences, Istanbul University, İstanbul, Türkiye
| | - Levent İzci
- Eğirdir Fisheries Faculty, Isparta University of Applied Sciences, Isparta, Türkiye
| | - Yesim Ozogul
- Department of Seafood Processing Technology, Faculty of Fisheries, Çukurova University, Adana, Türkiye.
| | - Bahar Tokur
- Fatsa Faculty of Marine Sciences, Ordu University, Ordu, Türkiye
| | - İlknur Ucak
- Faculty of Agricultural Sciences and Technologies, Nigde Omer Halisdemir University, Nigde, Türkiye
| | - Zafer Ceylan
- Department of Molecular Biology and Genetics/Biotechnology, Science Faculty, Bartın University, Bartın, Turkiye
| | - Piotr Kulawik
- Department of Animal Products Technology, Faculty of Food Technology, University of Agriculture in Cracow, Kraków, Poland.
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4
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Zhao Z, Peng L, Zhao Q, Wang Z. Genome-Wide Identification, Expression and Response to Estrogen of Vitellogenin Gene Family in Sichuan Bream ( Sinibrama taeniatus). Int J Mol Sci 2024; 25:6739. [PMID: 38928442 PMCID: PMC11203743 DOI: 10.3390/ijms25126739] [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: 04/20/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024] Open
Abstract
To enhance our understanding of teleost reproductive physiology, we identified six Sichuan bream (Sinibrama taeniatus) vitellogenin genes (vtg1-6) and characterized their sequence structures. We categorized them into type Ⅰ (vtg1,4,5 and 6), type Ⅱ (vtg2) and type Ⅲ (vtg3) based on differences in their subdomain structure. The promoter sequence of vtgs has multiple estrogen response elements, and their abundance appears to correlate with the responsiveness of vtg gene expression to estrogen. Gene expression analyses revealed that the vitellogenesis of Sichuan bream involves both heterosynthesis and autosynthesis pathways, with the dominant pathway originating from the liver. The drug treatment experiments revealed that 17β-estradiol (E2) tightly regulated the level of vtg mRNA in the liver. Feeding fish with a diet containing 100 μg/g E2 for three weeks significantly induced vtg gene expression and ovarian development, leading to an earlier onset of vitellogenesis. Additionally, it was observed that the initiation of vtg transcription required E2 binding to its receptor, a process primarily mediated by estrogen receptor alpha in Sichuan bream. The findings of this study provide novel insights into the molecular information of the vitellogenin gene family in teleosts, thereby contributing to the regulation of gonadal development in farmed fish.
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Affiliation(s)
- Zhe Zhao
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Southwest University, Chongqing 401329, China; (Z.Z.)
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Li Peng
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Southwest University, Chongqing 401329, China; (Z.Z.)
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Qiang Zhao
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Southwest University, Chongqing 401329, China; (Z.Z.)
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Zhijian Wang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Southwest University, Chongqing 401329, China; (Z.Z.)
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China
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5
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Zhang Y, Minami R, Tatsuno R, Gao W, Ueno M, Yamada A, Yoshida A, Sedanza MG, Arima K, Takatani T, Yamaguchi K, Oshima Y, Arakawa O. Wheat germ agglutinin affinity chromatography enrichment and glyco-proteomic characterization of tetrodotoxin-binding proteins from the plasma of cultured tiger pufferfish (Takifugu rubripes). Biosci Biotechnol Biochem 2023; 87:1155-1168. [PMID: 37458754 DOI: 10.1093/bbb/zbad095] [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: 05/03/2023] [Accepted: 07/07/2023] [Indexed: 09/24/2023]
Abstract
Efficient enrichment of tetrodotoxin (TTX)-binding proteins from the plasma of cultured tiger pufferfish (Takifugu rubripes) was achieved by ammonium sulfate fractionation and wheat germ agglutinin (WGA) affinity chromatography. The enrichment efficiency was validated by ultrafiltration-LC/MS-based TTX-binding assay and proteomics. Major proteins in the WGA-bound fraction were identified as isoform X1 (125 kDa) and X2 variants (88 and 79 kDa) derived from pufferfish saxitoxin and tetrodotoxin-binding protein (PSTBP) 1-like gene (LOC101075943). The 125-kDa X1 protein was found to be a novel member of the lipocalin family, having three tandemly repeated domains. X2 variants, X2α and X2β, were estimated to have two domains, and X2β is structurally related to Takifugu pardalis PSTBP2 in their domain type and arrangement. Among 11 potential N-glycosylation sites in the X2 precursor, 5 N-glycosylated Asn residues (N55, N89, N244, N308, and N449) were empirically determined. Structural relationships among PSTBP homologs and complexity of their proteoforms are discussed.
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Affiliation(s)
- Yafei Zhang
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Ryoma Minami
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Ryohei Tatsuno
- National Fisheries University, Japan Fisheries Research and Education Agency, Nagatahonmachi, Shimonoseki, Yamaguchi, Japan
| | - Wei Gao
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
- Dalian Blue Peptide Technology Research & Development Co., Ltd, Dalian, China
| | - Mikinori Ueno
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Akinori Yamada
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Asami Yoshida
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Mary Grace Sedanza
- Institute of Aquaculture, College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo, Philippines
| | - Kazunari Arima
- Department of Chemistry, Graduate School of Science and Engineering, Kagoshima University, Korimoto, Kagoshima, Japan
| | - Tomohiro Takatani
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Kenichi Yamaguchi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
| | - Yuji Oshima
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Hakozaki, Fukuoka, Japan
| | - Osamu Arakawa
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, Japan
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6
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Tatsuno R, Yamasaki R, Mizokami K, Hayashi G, Fukuda T, Furushita M, Takahashi H, Sonoyama T, Hori S. [Tetrodotoxin Content of the Small Gastropod Nassarius sufflatus]. SHOKUHIN EISEIGAKU ZASSHI. JOURNAL OF THE FOOD HYGIENIC SOCIETY OF JAPAN 2023; 64:236-239. [PMID: 38171895 DOI: 10.3358/shokueishi.64.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Severe tetrodotoxin (TTX) poisoning due to small gastropods has been documented in Japan. In this study, we investigated the TTX content of the muscles and viscera of Nassarius sufflatus collected off the coast of Futaoi Island, Shimonoseki, Yamaguchi Prefecture, Japan, to prevent the occurrence of TTX poisoning caused by this small gastropod. Live specimens were obtained, and their muscles and viscera were collected. Test solutions were prepared from tissues of specimens and analyzed for TTX by HPLC-fluorescence detection. TTX was detected in both tissues at concentrations ranging from <0.1 to 18.2 μg/g for muscle and <0.1 to 130.7 μg/g for viscera. These results suggested that N. sufflatus accumulates TTX not only in its viscera but also in its muscles, and that precautions should be taken to prevent food poisoning due to this gastropod.
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Affiliation(s)
- Ryohei Tatsuno
- Department of Food Science and Technology, National Fisheries University
| | - Ryo Yamasaki
- Department of Food Science and Technology, National Fisheries University
| | - Kai Mizokami
- Department of Food Science and Technology, National Fisheries University
| | - Genki Hayashi
- Department of Food Science and Technology, National Fisheries University
| | - Tsubasa Fukuda
- Department of Food Science and Technology, National Fisheries University
| | - Manabu Furushita
- Department of Food Science and Technology, National Fisheries University
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Oyama H, Ito M, Suo R, Goto-Inoue N, Morisasa M, Mori T, Sugita H, Mori T, Nakahigashi R, Adachi M, Nishikawa T, Itoi S. Changes in Tissue Distribution of Tetrodotoxin and Its Analogues in Association with Maturation in the Toxic Flatworm, Planocera multitentaculata. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2022; 24:1158-1167. [PMID: 36322281 DOI: 10.1007/s10126-022-10179-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The toxic flatworm, Planocera multitentaculata, possesses highly concentrated tetrodotoxin (TTX), also known as pufferfish toxin, throughout its life cycle, including the egg and larval stages. Additionally, TTX analogues, 5,6,11-trideoxyTTX and 11-norTTX-6(S)-ol, have also been detected in the flatworm. The high concentration of TTX in the eggs and larvae appears to be for protection against predation, and 11-norTTX-6(S)-ol in the pharyngeal tissue in the adults is likely used to sedate or kill prey during predation. However, information on the role of 5,6,11-trideoxyTTX, a potential important biosynthetic intermediate of TTX, in the toxic flatworm is lacking. Here, we aimed to determine the region of localization of TTX and its analogues in the flatworm body, understand their pharmacokinetics during maturation, and speculate on their function. Flatworm specimens in four stages of maturity, namely juvenile, mating, spawning, and late spawning, were subjected to LC-MS/MS analysis, using the pharyngeal tissue, oocytes in seminal receptacle, sperm, and tissue from 12 other sites. Although TTX was consistently high in the pharyngeal tissue throughout maturation, it was extremely high in the oocytes during the spawning period. Meanwhile, 5,6,11-trideoxyTTX was almost undetectable in the pharyngeal part throughout the maturation but was very abundant in the oocytes during spawning. 11-norTTX-6(S)-ol consistently localized in the pharyngeal tissue. Although the localization of TTX and its analogues was approximately consistent with the MS imaging data, TTX and 11-norTTX-6(S)-ol were found to be highly localized in the parenchyma surrounding the pharynx, which suggests the parenchyma is involved in the accumulation and production of TTXs.
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Affiliation(s)
- Hikaru Oyama
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Masaaki Ito
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Rei Suo
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Naoko Goto-Inoue
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Mizuki Morisasa
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Tsukasa Mori
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Haruo Sugita
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - Tetsushi Mori
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan
| | - Ryota Nakahigashi
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Aichi, 464-8601, Japan
| | - Masaatsu Adachi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Toshio Nishikawa
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Aichi, 464-8601, Japan
| | - Shiro Itoi
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan.
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Molecular Characterization of a New Tetrodotoxin-Binding Protein, Peroxiredoxin-1, from Takifugu bimaculatus. Int J Mol Sci 2022; 23:ijms23063071. [PMID: 35328490 PMCID: PMC8954737 DOI: 10.3390/ijms23063071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/03/2022] [Accepted: 03/09/2022] [Indexed: 02/04/2023] Open
Abstract
Pufferfish are considered a culinary delicacy but require careful preparation to avoid ingestion of the highly toxic tetrodotoxin (TTX), which accumulates in certain tissues. In this study, the tissue distribution of peroxiredoxin-1 from Takifugu bimaculatus was investigated. The peroxiredoxin-1 protein was obtained by in vitro recombinant expression and purification. The recombinant protein had a strong ability to scavenge hydroxyl radicals, protect superhelical DNA plasmids from oxidative damage, and protect L929 cells from H2O2 toxicity through in vitro antioxidant activity. In addition, we verified its ability to bind to tetrodotoxin using surface plasmon resonance techniques. Further, recombinant proteins were found to facilitate the entry of tetrodotoxin into cells. Through these analyses, we identified, for the first time, peroxiredoxin-1 protein from Takifugu bimaculatus as a potential novel tetrodotoxin-binding protein. Our findings provide a basis for further exploration of the application of peroxiredoxin-1 protein and the molecular mechanisms of tetrodotoxin enrichment in pufferfish.
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9
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Carducci F, Biscotti MA, Canapa A, Barucca M. The vitellogenin genes in Cynops orientalis: New insights on the evolution of the vtg gene family in amphibians. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART B, MOLECULAR AND DEVELOPMENTAL EVOLUTION 2021; 336:554-561. [PMID: 34170078 PMCID: PMC8596760 DOI: 10.1002/jez.b.23067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/24/2021] [Accepted: 06/14/2021] [Indexed: 11/07/2022]
Abstract
The vitellogenins (Vtgs) are glycolipophosphoproteins that play a key role in constituting nutritional reserves for embryo development in nonmammalian vertebrates. However, additional functional roles have been evidenced. These vtg genes are present in multiple copies, different in number and sequences in various vertebrate lineages. The comprehension of the vtg gene family evolutionary history remains a matter of intense interrogation for this field of research. In tetrapods, information about vtg genes are limited to few taxa. Up to date concerning amphibians, detailed studies have been conducted only in Anura. Therefore, in this study, to further increase knowledge about vtg genes in Amphibia class, the urodele Cynops orientalis (Amphibia: Caudata) was analyzed and four complete vtg sequences were obtained. Moreover, genomic data available for the caecilians Microcaecilia unicolor and Rhinatrema bivittatum (Amphibia: Gymnophiona) were also included. In these amphibians, our findings evidenced the presence of a vtgI sequence ortholog to that of tetrapods, absent in Anura. Moreover, microsyntenic, phylogenetic, and gene conversion analyses allowed postulating two hypotheses to explain the complex evolutionary history of this gene family.
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Affiliation(s)
- Federica Carducci
- Dipartimento di Scienze della Vita e dell'AmbienteUniversità Politecnica delle MarcheAnconaItaly
| | - Maria A. Biscotti
- Dipartimento di Scienze della Vita e dell'AmbienteUniversità Politecnica delle MarcheAnconaItaly
| | - Adriana Canapa
- Dipartimento di Scienze della Vita e dell'AmbienteUniversità Politecnica delle MarcheAnconaItaly
| | - Marco Barucca
- Dipartimento di Scienze della Vita e dell'AmbienteUniversità Politecnica delle MarcheAnconaItaly
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Molecular Characterization of the Von Willebrand Factor Type D Domain of Vitellogenin from Takifugu flavidus. Mar Drugs 2021; 19:md19040181. [PMID: 33806251 PMCID: PMC8065724 DOI: 10.3390/md19040181] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 01/21/2023] Open
Abstract
The von Willebrand factor type D (VWD) domain in vitellogenin has recently been found to bind tetrodotoxin. The way in which this protein domain associates with tetrodotoxin and participates in transporting tetrodotoxin in vivo remains unclear. A cDNA fragment of the vitellogenin gene containing the VWD domain from pufferfish (Takifugu flavidus) (TfVWD) was cloned. Using in silico structural and docking analyses of the predicted protein, we determined that key amino acids (namely, Val115, ASP116, Val117, and Lys122) in TfVWD mediate its binding to tetrodotoxin, which was supported by in vitro surface plasmon resonance analysis. Moreover, incubating recombinant rTfVWD together with tetrodotoxin attenuated its toxicity in vivo, further supporting protein–toxin binding and indicating associated toxicity-neutralizing effects. Finally, the expression profiling of TfVWD across different tissues and developmental stages indicated that its distribution patterns mirrored those of tetrodotoxin, suggesting that TfVWD may be involved in tetrodotoxin transport in pufferfish. For the first time, this study reveals the amino acids that mediate the binding of TfVWD to tetrodotoxin and provides a basis for further exploration of the molecular mechanisms underlying the enrichment and transfer of tetrodotoxin in pufferfish.
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Tatsuno R, Umeeda M, Miyata Y, Ideguchi R, Fukuda T, Furushita M, Ino Y, Yoshikawa H, Takahashi H, Nagashima Y. [Toxicity of Takifugu exascurusCollected from the Sea of Kumano]. Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 2021; 62:28-32. [PMID: 33658461 DOI: 10.3358/shokueishi.62.28] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Marine pufferfish Takifugu exascurus is not approved for human consumption due to the lack of information on its toxicity. To clarify the toxicity of T. exascurus, ten live specimens were collected from the Sea of Kumano, Japan, and the toxicity and tetrodotoxin (TTX) concentration were determined using mouse bioassay and high performance liquid chromatography-fluorescence detection (HPLC-FLD), respectively. Toxicity was observed in the skin, liver, and ovaries, but the testes and muscle were non-toxic (<10 MU/g). On the other hand, HPLC-FLD revealed that TTX was detected in the muscle in two of the 10 specimens (1.4 and 1.5 MU/g). Based on the results, TTX is the main toxic component contributing to toxicity in T. exascurus.
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Affiliation(s)
- Ryohei Tatsuno
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Masato Umeeda
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Yumi Miyata
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Ririko Ideguchi
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Tsubasa Fukuda
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Manabu Furushita
- Department of Food Science and Technology, National Fisheries University, Japan Fisheries Research and Education Agenc
| | - Yasuko Ino
- Department of Applied Aquabiology, National Fisheries University, Japan Fisheries Research and Education Agency
| | - Hiroyuki Yoshikawa
- Department of Applied Aquabiology, National Fisheries University, Japan Fisheries Research and Education Agency
| | - Hiroshi Takahashi
- Department of Applied Aquabiology, National Fisheries University, Japan Fisheries Research and Education Agency
| | - Yuji Nagashima
- Department of Agro-Food Science, Niigata Agro-Food University
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Carducci F, Biscotti MA, Canapa A. Vitellogenin gene family in vertebrates: evolution and functions. EUROPEAN ZOOLOGICAL JOURNAL 2019. [DOI: 10.1080/24750263.2019.1631398] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- F. Carducci
- Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Ancona, Italy
| | - M. A. Biscotti
- Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Ancona, Italy
| | - A. Canapa
- Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Ancona, Italy
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Pufferfish Saxitoxin and Tetrodotoxin Binding Protein (PSTBP) Analogues in the Blood Plasma of the Pufferfish Arothron nigropunctatus, A. hispidus, A. manilensis, and Chelonodon patoca. Mar Drugs 2018; 16:md16070224. [PMID: 29966285 PMCID: PMC6071046 DOI: 10.3390/md16070224] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/13/2018] [Accepted: 06/22/2018] [Indexed: 01/20/2023] Open
Abstract
Pufferfish saxitoxin and tetrodotoxin (TTX) binding protein (PSTBP) is a glycoprotein that we previously isolated from the blood plasma of the pufferfish Takifugu pardalis; this protein was also detected in seven species of the genus Takifugu. We proposed that PSTBP is a carrier protein for TTX in pufferfish; however, PSTBP had not yet been found in genera other than Takifugu. In this study, we investigated the presence of PSTBP-like proteins in the toxic pufferfish Arothron nigropunctatus, A. hispidus, A. manilensis, and Chelonodon patoca. On the basis of ultrafiltration experiments, TTX was found to be present and partially bound to proteins in the plasma of these pufferfish, and Western blot analyses with anti-PSTBP antibody revealed one or two bands per species. The observed decreases in molecular mass following deglycosylation with glycopeptidase F suggest that these positive proteins are glycoproteins. The molecular masses of the deglycosylated proteins detected in the three Arothron species were larger than that of PSTBP in the genus Takifugu, whereas the two bands detected in C. patoca had molecular masses similar to that of tributyltin-binding protein-2 (TBT-bp2). The N-terminal amino acid sequences of 23–29 residues of these detected proteins were all homologous with those of PSTBP and TBT-bp2.
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Kudo Y, Chiba C, Konoki K, Cho Y, Yotsu-Yamashita M. Dietary administration of tetrodotoxin and its putative biosynthetic intermediates to the captive-reared non-toxic Japanese fire-bellied newt, Cynops pyrrhogaster. Toxicon 2017; 137:78-82. [DOI: 10.1016/j.toxicon.2017.07.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 07/10/2017] [Accepted: 07/14/2017] [Indexed: 10/19/2022]
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