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Luo WJ, Song P, He ZM, Cao SP, Tang JZ, Xu WQ, Xiong D, Qu FF, Zhao DF, Liu Z, Li JZ, Yin YL. JAK2 Mediates the Regulation of Pept1 Expression by Leptin in the Grass Carp ( Ctenopharyngodon idella) Intestine. Front Physiol 2020; 11:79. [PMID: 32116786 PMCID: PMC7033393 DOI: 10.3389/fphys.2020.00079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 01/23/2020] [Indexed: 11/17/2022] Open
Abstract
Oligopeptide transporter 1 (Pept1) is located on the brush border membrane of the intestinal epithelium and plays an important role in dipeptide and tripeptide absorption from protein digestion. In this study, we cloned and characterized the cDNA sequence of Janus kinase 2 (JAK2) from Ctenopharyngodon idella. The expression patterns of JAK2 in various tissues and developmental stages were characterized by quantitative real-time PCR (qRT-PCR). The mRNA expression levels of JAK2 and Pept1 regulated by leptin in the intestine were also analyzed in vitro and in vivo. The cDNA sequence of JAK2 is 3378 bp in length, and the mRNA of JAK2 was broadly expressed in all tissues and embryonic stages of C. idella analyzed. In addition, we found that leptin regulated expression of JAK2 and Pept1 in the intestine; Pept1 expression was down-regulated by the JAK2 inhibitor AG490 in vivo and in vitro. Furthermore, luciferase experiments showed that overexpression of the JAK2 gene significantly upregulated the activity of the Pept1 5′ regulatory sequence in C. idella. In conclusion, these results may help in elucidating the regulatory effect of the leptin-mediated JAK2 pathway on intestinal Pept1 expression in C. idella and the molecular mechanism of peptide transport by the intestinal transporter Pept1 in fishes.
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Affiliation(s)
- Wen-Jie Luo
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China.,Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Peng Song
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zhi-Min He
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Shen-Ping Cao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jian-Zhou Tang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Wen-Qian Xu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Ding Xiong
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Fu-Fa Qu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Da-Fang Zhao
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Zhen Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jian-Zhong Li
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Yu-Long Yin
- Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
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Zhu XY, Liu HC, Guo SY, Xia B, Song RS, Lao QC, Xuan YX, Li CQ. A Zebrafish Thrombosis Model for Assessing Antithrombotic Drugs. Zebrafish 2016; 13:335-44. [DOI: 10.1089/zeb.2016.1263] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Xiao-Yu Zhu
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, Wenzhou Medical University, Wenzhou, People's Republic of China
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
- Innovation Team of Drug Safety Evaluation, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Hangzhou, People's Republic of China
| | - Hong-Cui Liu
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
| | - Sheng-Ya Guo
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
| | - Bo Xia
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
| | - Ru-Shun Song
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
| | - Qiao-Cong Lao
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
| | - Yao-Xian Xuan
- Innovation Team of Drug Safety Evaluation, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Hangzhou, People's Republic of China
- Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou, People's Republic of China
| | - Chun-Qi Li
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, Wenzhou Medical University, Wenzhou, People's Republic of China
- Hunter Biotechnology, Inc., Hangzhou City, People's Republic of China
- Innovation Team of Drug Safety Evaluation, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Hangzhou, People's Republic of China
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Post-transcriptional gene silencing by RNA interference in non-mammalian vertebrate systems: Where do we stand? MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2011; 728:158-71. [DOI: 10.1016/j.mrrev.2011.09.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Revised: 09/02/2011] [Accepted: 09/06/2011] [Indexed: 12/20/2022]
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Aggad D, Stein C, Sieger D, Mazel M, Boudinot P, Herbomel P, Levraud JP, Lutfalla G, Leptin M. In vivo analysis of Ifn-γ1 and Ifn-γ2 signaling in zebrafish. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2010; 185:6774-82. [PMID: 21048110 DOI: 10.4049/jimmunol.1000549] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The zebrafish genome contains a large number of genes encoding potential cytokine receptor genes as judged by homology to mammalian receptors. The sequences are too divergent to allow unambiguous assignments of all receptors to specific cytokines, and only a few have been assigned functions by functional studies. Among receptors for class II helical cytokines-i.e., IFNs that include virus-induced Ifns (Ifn-) and type II Ifns (Ifn-γ), together with Il-10 and its related cytokines (Il-20, Il-22, and Il-26)-only the Ifn--specific complexes have been functionally identified, whereas the receptors for the two Ifn-γ (Ifn-γ1 and Ifn-γ2) are unknown. In this work, we identify conditions in which Ifn-γ1 and Ifn-γ2 (also called IFNG or IFN-γ and IFN-gammarel) are induced in fish larvae and adults. We use morpholino-mediated loss-of-function analysis to screen candidate receptors and identify the components of their receptor complexes. We find that Ifn-γ1 and Ifn-γ2 bind to different receptor complexes. The receptor complex for Ifn-γ2 includes cytokine receptor family B (Crfb)6 together with Crfb13 and Crfb17, whereas the receptor complex for Ifn-γ1 does not include Crfb6 or Crfb13 but includes Crfb17. We also show that of the two Jak2 paralogues present in the zebrafish Jak2a but not Jak2b is involved in the intracellular transmission of the Ifn-γ signal. These results shed new light on the evolution of the Ifn-γ signaling in fish and tetrapods and contribute toward an integrated view of the innate immune regulation in vertebrates.
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Affiliation(s)
- Dina Aggad
- Dynamique des Intéractions Membranaires Normales et Pathologiques, Centre National de la Recherche Scientifique Unité Mixte de Recherche 5235, Montpellier, France
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Leong IUS, Skinner JR, Shelling AN, Love DR. Zebrafish as a model for long QT syndrome: the evidence and the means of manipulating zebrafish gene expression. Acta Physiol (Oxf) 2010; 199:257-76. [PMID: 20331541 DOI: 10.1111/j.1748-1716.2010.02111.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Congenital long QT syndrome (LQT) is a group of cardiac disorders associated with the dysfunction of cardiac ion channels. It is characterized by prolongation of the QT-interval, episodes of syncope and even sudden death. Individuals may remain asymptomatic for most of their lives while others present with severe symptoms. This heterogeneity in phenotype makes diagnosis difficult with a greater emphasis on more targeted therapy. As a means of understanding the molecular mechanisms underlying LQT syndrome, evaluating the effect of modifier genes on disease severity as well as to test new therapies, the development of model systems remains an important research tool. Mice have predominantly been the animal model of choice for cardiac arrhythmia research, but there have been varying degrees of success in recapitulating the human symptoms; the mouse cardiac action potential (AP) and surface electrocardiograms exhibit major differences from those of the human heart. Against this background, the zebrafish is an emerging vertebrate disease modelling species that offers advantages in analysing LQT syndrome, not least because its cardiac AP much more closely resembles that of the human. This article highlights the use and potential of this species in LQT syndrome modelling, and as a platform for the in vivo assessment of putative disease-causing mutations in LQT genes, and of therapeutic interventions.
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Identification of a novel inhibitor of JAK2 tyrosine kinase by structure-based virtual screening. Bioorg Med Chem Lett 2009; 19:3598-601. [PMID: 19447617 DOI: 10.1016/j.bmcl.2009.04.138] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 04/27/2009] [Accepted: 04/27/2009] [Indexed: 01/17/2023]
Abstract
Janus kinase 2 (JAK2) plays a crucial role in the pathomechanism of myeloproliferative disorders and hematologic malignancies. A somatic mutation of JAK2 (Val617Phe) was previously shown to occur in 98% of patients with polycythemia vera and 50% of patients with essential thrombocythemia and primary myelofibrosis. Thus, effective JAK2 kinase inhibitors may be of significant therapeutic importance. Here, we applied a structure-based virtual screen to identify novel JAK2 inhibitors. One JAK2 inhibitor in particular, G6, demonstrated remarkable potency as well as specificity, which makes it as a potential lead candidate against diseases related to elevated JAK2 tyrosine kinase activity.
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