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Priyathilaka TT, Elvitigala DAS, Whang I, Lim BS, Jeong HB, Yeo SY, Choi CY, Lee J. Molecular characterization and transcriptional analysis of non-mammalian type Toll like receptor (TLR21) from rock bream (Oplegnathus fasciatus). Gene 2014; 553:105-16. [PMID: 25300254 DOI: 10.1016/j.gene.2014.10.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 10/03/2014] [Accepted: 10/05/2014] [Indexed: 01/02/2023]
Abstract
Toll-like receptors (TLRs) are a large family of pattern recognition receptors, which are involved in triggering host immune responses against various pathogens by detecting their evolutionarily conserved pathogen associated molecular patterns (PAMPs). TLR21 is a non-mammalian type TLR, which recognizes unmethylated CpG DNA, and is considered as a functional homolog of mammalian TLR9. In this study, we attempted to identify and characterize a novel TLR21 counterpart from rock bream (Oplegnathus fasciatus) designated as RbTLR21, at molecular level. The complete coding sequence of RbTLR21 was 2919bp in length, which encodes a polypeptide of 973 amino acids with a predicted molecular mass of 112kDa and a theoretical isoelectric point of 8.6. The structure of the deduced RbTLR21 protein is similar to that of the members of typical TLR family, and includes the ectodomain, which consists of 16 leucine rich repeats (LRRs), a transmembrane domain, and a cytoplasmic Toll/interleukin-1 receptor (TIR) domain. According to the pairwise sequence analysis data, RbTLR21 was homologous to that of the orange-spotted grouper (Epinephelus coioides) with 76.9% amino acid identity. Furthermore, our phylogenetic analysis revealed that RbTLR21 is closely related to E. coioides TLR21. The RbTLR21 was ubiquitously expressed in all the tissues tested, but the highest expression was found in spleen. Additionally, upon stimulation with Streptococcus iniae, rock bream iridovirus (RBIV), and Edwardsiella tarda, RbTLR21 mRNA was significantly up-regulated in spleen tissues. Collectively, our findings suggest that RbTLR21 is indeed an ortholog of the TLR21 family and may be important in mounting host immune responses against pathogenic infections.
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Affiliation(s)
- Thanthrige Thiunuwan Priyathilaka
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea
| | - Don Anushka Sandaruwan Elvitigala
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea
| | - Ilson Whang
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea
| | - Bong-Soo Lim
- Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea
| | - Hyung-Bok Jeong
- Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea
| | - Sang-Yeob Yeo
- Department of Biotechnology, Division of Applied Chemistry & Biotechnology, Hanbat National University, Daejeon 305-719, Republic of Korea
| | - Cheol Young Choi
- Division of Marine Environment and Bioscience, Korea Maritime University, Busan 606-791, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Special Self-Governing Province 690-756, Republic of Korea.
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Lee S, Lim B, Lee J, Kim YC, Kim H, Priyathilaka TT, Wickramaarachchi WDN, Kim SJ, Kim SK, Jeong HB. Up-regulation of the arginine vasotocin precursor gene from Paralichthys olivaceus: isolation and expression upon acute pathogen invasion. Genes Genomics 2014. [DOI: 10.1007/s13258-014-0178-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wickramaarachchi WDN, Whang I, Kim E, Lim BS, Jeong HB, De Zoysa M, Oh MJ, Jung SJ, Yeo SY, Kim SY, Park HC, Lee J. Genomic characterization and transcriptional evidence for the involvement of complement component 7 in immune response of rock bream (Oplegnathus fasciatus). Dev Comp Immunol 2013; 41:44-49. [PMID: 23603298 DOI: 10.1016/j.dci.2013.04.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 04/03/2013] [Accepted: 04/08/2013] [Indexed: 06/02/2023]
Abstract
The complement component 7 (C7) is the central mediator of pathogenic attack at the membrane surface and its binding to the C5b-7 complex triggers cytolytic signaling. In this study, C7 of rock bream (Oplegnathus fasciatus) was identified (Rb-C7) and characterized at the genomic level. The Rb-C7 gene contains 18 exons and 17 introns and is composed of a 2490 bp complete open reading frame (ORF). The encoded polypeptide (830 amino acids) contains a number of well-conserved C7 signature domains. Important putative transcription factor binding sites, including those for NF-κB, SP-1, C/EBP, AP-1 and OCT-1, are present in the 5'-flanking region of Rb-C7. Phylogenetic analysis revealed a close proximity of Rb-C7 with the orthologues in tilapia and Japanese flounder. Quantitative real-time PCR (qPCR) analysis confirmed constitutive Rb-C7 expression throughout all the examined tissue of healthy rock bream, with highest expression in liver. In immune challenge experiment, Rb-C7 expression was up-regulated in head kidney and liver in response to Edwardsiella tarda, Streptococcus iniae, lipopolysaccharide and rock bream iridovirus (RBIV). Furthermore, significant increases of both intracellular expression level and the number of Rb-C7-expressing cells were detected by in situ hybridization assay in head kidney and liver tissues upon E. tarda infection. These results suggested that Rb-C7 is lytic pathway gene in complement system and its transcriptional regulation may be an important immune response in pathogenic defense mechanism of rock bream.
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Affiliation(s)
- W D Niroshana Wickramaarachchi
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea
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Hur SP, Lim BS, Hwang IJ, Kim SJ, Ryu YW, Hur SW, Song YB, Jeong HB, Baek HJ, Takemura A, Lee YD. Masculinization in juvenile longtooth grouper,Epinephelus bruneus, with aromatase inhibitor: changes in GtH subunit mRNA expression and steroids hormone levels. Anim Cells Syst (Seoul) 2012. [DOI: 10.1080/19768354.2011.607515] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Hur SP, Takeuchi Y, Esaka Y, Nina W, Park YJ, Kang HC, Jeong HB, Lee YD, Kim SJ, Takemura A. Diurnal expression patterns of neurohypophysial hormone genes in the brain of the threespot wrasse Halichoeres trimaculatus. Comp Biochem Physiol A Mol Integr Physiol 2011; 158:490-7. [DOI: 10.1016/j.cbpa.2010.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 12/06/2010] [Accepted: 12/08/2010] [Indexed: 10/18/2022]
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Hyeon KM, Jeong HB, Lim BS, Hur SP, Lee YD, Park JG, Kim SJ. Molecular cloning of GnRH1 gene and GTH cDNAs of the protogynous longtooth grouper, Epinephelus bruneus. Genes Genomics 2010. [DOI: 10.1007/s13258-010-0092-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kang SI, Jin YJ, Ko HC, Choi SY, Hwang JH, Whang I, Kim MH, Shin HS, Jeong HB, Kim SJ. Petalonia improves glucose homeostasis in streptozotocin-induced diabetic mice. Biochem Biophys Res Commun 2008; 373:265-9. [PMID: 18555794 DOI: 10.1016/j.bbrc.2008.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2008] [Accepted: 06/05/2008] [Indexed: 12/22/2022]
Abstract
The anti-diabetic potential of Petalonia binghamiae extract (PBE) was evaluated in vivo. Dietary administration of PBE to streptozotocin (STZ)-induced diabetic mice significantly lowered blood glucose levels and improved glucose tolerance. The mode of action by which PBE attenuated diabetes was investigated in vitro using 3T3-L1 cells. PBE treatment stimulated 3T3-L1 adipocyte differentiation as evidenced by increased triglyceride accumulation. At the molecular level, peroxisome proliferator-activated receptor gamma (PPARgamma) and terminal marker protein aP2, as well as the mRNA of GLUT4 were up-regulated by PBE. In mature adipocytes, PBE significantly stimulated the uptake of glucose and the expression of insulin receptor substrate-1 (IRS-1). Furthermore, PBE increased PPARgamma luciferase reporter gene activity in COS-1 cells. Taken together, these results suggest that the in vivo anti-diabetic effect of PBE is mediated by both insulin-like and insulin-sensitizing actions in adipocytes.
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Affiliation(s)
- Seong-Il Kang
- Department of Life Science, Cheju National University, 66 Jejudaehakno, Ara-1 Dong, Jejusi, Jeju 690-756, Republic of Korea
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Park YJ, Park JG, Jeong HB, Takeuchi Y, Kim SJ, Lee YD, Takemura A. Expression of the melatonin receptor Mel1c in neural tissues of the reef fish Siganus guttatus. Comp Biochem Physiol A Mol Integr Physiol 2007; 147:103-11. [PMID: 17293145 DOI: 10.1016/j.cbpa.2006.11.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2006] [Revised: 11/27/2006] [Accepted: 11/27/2006] [Indexed: 12/15/2022]
Abstract
The golden rabbitfish, Siganus guttatus, is a reef fish exhibiting a restricted lunar-related rhythm in behavior and reproduction. Here, to understand the circadian rhythm of this lunar-synchronized spawner, a melatonin receptor subtype-Mel(1c)-was cloned. The full-length Mel(1c) melatonin receptor cDNA comprised 1747 bp with a single open reading frame (1062 bp) that encodes a 353-amino acid protein, which included 7 presumed transmembrane domains. Real-time PCR revealed high Mel(1c) mRNA expression in the retina and brain but not in the peripheral tissues. When the fish were reared under light/dark (LD 12:12) conditions, Mel(1c) mRNA in the retina and brain was expressed with daily variations and increased during nighttime. Similar variations were noted under constant conditions, suggesting that Mel(1c) mRNA expression is regulated by the circadian clock system. Daily variations of Mel(1c) mRNA expression with a peak at zeitgeber time (ZT) 12 were observed in the cultured pineal gland under LD 12:12. Exposure of the cultured pineal gland to light at ZT17 resulted in a decrease in Mel(1c) mRNA expression. When light was obstructed at ZT5, the opposite effect was obtained. These results suggest that light exerts certain effects on Mel(1c) mRNA expression directly or indirectly through melatonin actions.
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Affiliation(s)
- Yong-Ju Park
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa 905-0227, Japan
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