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Madushani KP, Shanaka KASN, Yang H, Lim C, Jeong T, Tharuka MDN, Lee J. Molecular characterization, expression profile, and antiviral activity of redlip mullet (Liza haematocheila) viperin. Comp Biochem Physiol B Biochem Mol Biol 2021; 258:110699. [PMID: 34801710 DOI: 10.1016/j.cbpb.2021.110699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/24/2021] [Accepted: 11/12/2021] [Indexed: 01/08/2023]
Abstract
Viperin is known to exhibit activity against RNA viral infection. Viral hemorrhagic septicemia virus (VHSV) is a negative-sense single-stranded RNA virus that causes severe loss in aquaculture species. Susceptible species include redlip mullets (Liza haematocheila), which has become an economically important euryhaline mugilid species in offshore aquaculture along the west coast of Korea. Although interferon-stimulated genes are suspected to act against VHSV, specific pathways or mechanisms of these antiviral actions in redlip mullets have not yet been established. In silico studies of the mullet viperin (Lhrsad2) revealed an S-adenosyl methionine binding conserved domain containing the 77CNYKCGFC84 sequence. In the tissue distribution, the highest levels of lhrsad2 expression were observed in the blood. When injected with poly(I:C), an approximately 17-fold upregulation (compared to the control) of viperin was detected in the blood after 24 h. Furthermore, non-viral immune stimuli, including Lactococcus garvieae (L. garvieae) and lipopolysaccharide (LPS), that were injected into redlip mullets were not found to induce considerable levels of viperin expression. Subcellular analysis revealed that Lhrsad2 localized to the endoplasmic reticulum (ER). To investigate Lhrsad2's antiviral effects against VHSV, cells overexpressing lhrsad2 were infected with VHSV, and then the viral titer and viral gene expression were analyzed. Both assays revealed the potential of Lhrsad2 to significantly reduce VHSV transcription and replication. In brief, the current study illustrates the remarkable ability of viperin to weaken VHSV in redlip mullet.
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Affiliation(s)
- K P Madushani
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province 63333, Republic of Korea
| | - K A S N Shanaka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province 63333, Republic of Korea
| | - Hyerim Yang
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea
| | - Chaehyeon Lim
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea
| | - Taehyug Jeong
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea
| | - M D Neranjan Tharuka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province 63333, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province 63333, Republic of Korea.
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Trypsin induces an aversive response in zebrafish by PAR2 activation in keratinocytes. PLoS One 2021; 16:e0257774. [PMID: 34624042 PMCID: PMC8500423 DOI: 10.1371/journal.pone.0257774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/09/2021] [Indexed: 11/19/2022] Open
Abstract
Previously we have shown that trypsin, a protein typically involved in digestion, is released from gills of both fresh and saltwater fishes into surrounding water under stress or injury. We have also shown that each species produces trypsin with different specific activities. In this report, using zebrafish as a model, we identified that trypsin induces an aversive response in zebrafish larvae and adult zebrafish. Since Protease-Activated Receptor 2 (PAR2) responds to trypsin, we tested whether the aversive response is dependent on the activation of PAR2 located on the zebrafish skin cells. Zebrafish larvae treated separately with neomycin and zinc sulfate also showed aversive response indicating neuromast, and olfactory cells are not involved in this aversion. Cultured keratinocytes from zebrafish showed a response to trypsin. Zebrafish larvae subjected to knockdown of par2a also exhibited reduced escape response. Similarly, par2a-deficient mutant larvae displayed no response to trypsin. Since it has been shown that stress activates PAR2 and sends signals to the brain as shown by the increased c-fos expression, we tested c-fos expression in adult zebrafish brains after trypsin treatment of adults and found enhanced c-fos expression by qRT-PCR. Taken together, our results show that the trypsin activates PAR2 on keratinocytes signaling the brain, and this pathway of trypsin-induced escape response will provide a unique communication mechanism in zebrafish. Furthermore, since PAR2 activation also occurs in pain/pruritus sensing, this model might be useful in elucidating components of signaling pathways in pain/pruritus.
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Pascual AS, Rapanan JL, Uppalapati CK, Cooper KE, Leyva KJ, Hull EE. Dual inhibition of TGFβR and ROCK reverses the epithelial to mesenchymal transition in collectively migrating zebrafish keratocytes. Cell Biol Int 2021; 45:1288-1295. [PMID: 33710707 PMCID: PMC8252571 DOI: 10.1002/cbin.11587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/19/2021] [Accepted: 02/07/2021] [Indexed: 01/14/2023]
Abstract
There is a growing controversy about the role of the epithelial to mesenchymal transition (EMT) in the fibrosis associated with chronic disease. Recent studies suggest that it is not the EMT transcriptional program but differentiation of progenitor cells, response to chronic inflammation, or some combination of both which cause the appearance of fibroblasts and the production of the extracellular matrix. To address this issue, we study the EMT process in the zebrafish keratocytes which migrate from primary explants of epithelial tissue as these cells are both terminally differentiated and able to divide. To firmly place this EMT process in the context of other systems, we first demonstrate that the zebrafish keratocyte EMT process involves nuclear accumulation of twist and snail/slug transcription factors as part of a TGFβR‐mediated EMT process. As assessed by the expression and localization of EMT transcription factors, the zebrafish keratocyte EMT process is reversed by the addition of Rho‐activated kinase (ROCK) in combination with TGFβR inhibitors. The complete cycle of EMT to MET observed in this system links these in vitro results more closely to the process of wound healing in vivo. However, the absence of observable activation of EMT transcription factors when keratocytes are cultured on compliant substrata in a TGFβ1‐containing medium suggests that ROCK signaling, initiated by tension within the sheet, is an essential contributor to the EMT process. Most importantly, the requirement for ROCK activation by culturing on noncompliant substrata suggests that EMT in these terminally differentiated cells would not occur in vivo.
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Affiliation(s)
- Agnes S Pascual
- Biomedical Sciences Program, College of Graduate Studies, Midwestern University, Glendale, Arizona, USA
| | - Jose L Rapanan
- Arizona College of Osteopathic Medicine, Midwestern University, Glendale, Arizona, USA
| | - Chandana K Uppalapati
- Department of Microbiology & Immunology, College of Graduate Studies, Midwestern University, Glendale, Arizona, USA
| | - Kimbal E Cooper
- Biomedical Sciences Program, College of Graduate Studies, Midwestern University, Glendale, Arizona, USA
| | - Kathryn J Leyva
- Department of Microbiology & Immunology, College of Graduate Studies, Midwestern University, Glendale, Arizona, USA
| | - Elizabeth E Hull
- Biomedical Sciences Program, College of Graduate Studies, Midwestern University, Glendale, Arizona, USA
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Vergneau-Grosset C, Nadeau ME, Groff JM. Fish Oncology: Diseases, Diagnostics, and Therapeutics. Vet Clin North Am Exot Anim Pract 2017; 20:21-56. [PMID: 27890290 DOI: 10.1016/j.cvex.2016.07.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The scientific literature contains a wealth of information concerning spontaneous fish neoplasms, although ornamental fish oncology is still in its infancy. The occurrence of fish neoplasms has often been associated with oncogenic viruses and environmental insults, making them useful markers for environmental contaminants. The use of fish, including zebrafish, as models of human carcinogenesis has been developed and knowledge gained from these models may also be applied to ornamental fish, although more studies are required. This review summarizes information available about fish oncology pertaining to veterinary clinicians.
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Affiliation(s)
- Claire Vergneau-Grosset
- Centre Hospitalier Vétérinaire Universitaire, Faculté de médecine vétérinaire, Université de Montréal, 3200 rue Sicotte, Saint-Hyacinthe J2S 2M2, Quebec, Canada; Aquarium du Québec, 1675 Avenue des Hôtels, Ville de Québec, QC G1W 4S3, Canada.
| | - Marie-Eve Nadeau
- Centre Hospitalier Vétérinaire Universitaire, Faculté de médecine vétérinaire, Université de Montréal, 3200 rue Sicotte, Saint-Hyacinthe J2S 2M2, Quebec, Canada
| | - Joseph M Groff
- William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, Shields Avenue, Davis, CA 95616, USA
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Ai XY, Liu HJ, Lu C, Liang CL, Sun Y, Chen S, Sun B, Li Y, Liu YR, Zhang Q, Liu XQ, Xiao T, Jing XS, Sun T, Zhou HG, Yang C. Phenytoin silver: a new nanocompound for promoting dermal wound healing via comprehensive pharmacological action. Am J Cancer Res 2017; 7:425-435. [PMID: 28255340 PMCID: PMC5327358 DOI: 10.7150/thno.17073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/28/2016] [Indexed: 11/18/2022] Open
Abstract
Phenytoin, an antiepileptic drug, has been widely used for wound healing. Inspired by previous studies, phenytoin silver (PnAg), a sparingly soluble silver nanocompound, was synthesized which exhibited good therapeutic efficacy in tissue repair with low toxicity (LD50 >5 g/kg). In vivo studies showed that PnAg could accelerate dermal wound healing and strong inflammation control in Sprague-Dawley rats (SD rat) and Bama minipigs. Due to its low solubility, PnAg led to low toxicity and blood enrichment in animals. Furthermore, PnAg could upregulate the promoter activity of Jak, Stat3, and Stat3 downstream proteins. Therefore, PnAg may serve as an effective therapeutic compound for wound healing through regulating the gp130/Jak/Stat3 signaling pathway.
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