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Ouyang G, Sun R, Wan X, Yuan L, Shi Z, Wang Q, Wang B, Luo Y, Ji W. Characterization, expression and function analysis of pfTLR5S and pfTLR5M in yellow catfish (Pelteobagrus fulvidraco) responding to bacterial challenge. Int J Biol Macromol 2022; 216:322-335. [PMID: 35777512 DOI: 10.1016/j.ijbiomac.2022.06.155] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/23/2022] [Accepted: 06/23/2022] [Indexed: 11/05/2022]
Abstract
Toll-Like Receptors (TLRs) are important pattern recognition receptors, playing critical roles in the early innate immune response to defensing against pathogen invasion. In this study, we found both soluble form TLR5 (pfTLR5S) and membrane form TLR5 (pfTLR5M) in yellow catfish Pelteobagrus fulvidraco. The open reading frames (ORFs) of pfTLR5M and pfTLR5S genes were 2655 bp and 1947 bp in length, encoding 884 and 648 amino acids, respectively. pfTLR5M was composed of thirteen LRR domains, one TIR domain and one transmembrane domain. However, pfTLR5S have only fifteen LRR domains, without any TIR domain and transmembrane domain. Both pfTLR5M and pfTLR5S genes had the highest expression in liver, especially for pfTLR5S, which showed a noticeable high expression in liver. We also compared the relative mRNA expression levels of pfTLR5M and pfTLR5S in digestive and immune-related tissues after challenge of three different bacteria. In addition, we also found that pfTLR5S can interact with pfTLR5M, and inhibit the expression of pfTLR5M protein, while induced the expression of downstream proinflammatory factors, such as TNFα and IL8. These results revealed that both pfTLR5M and pfTLR5S play important and different roles in defensing against the invasion of flagellated bacteria, and they may function by binding to each other.
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Affiliation(s)
- Gang Ouyang
- The Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan 430072, PR China; Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Ruhan Sun
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinyu Wan
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Le Yuan
- The Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan 430072, PR China; Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zechao Shi
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Qin Wang
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Bingchao Wang
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Yanzhi Luo
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Ji
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China; The Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan 430072, PR China; Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Coalescing lessons from oxygen sensing, tumor metabolism, and epigenetics to target VHL loss in kidney cancer. Semin Cancer Biol 2020; 67:34-42. [DOI: 10.1016/j.semcancer.2020.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/12/2020] [Accepted: 03/19/2020] [Indexed: 01/14/2023]
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Kim SH, Kil IS, Kwon OS, Kang BS, Lee DS, Lee HS, Lee JH, Park JW. Oxalomalate reduces tumor progression in melanoma via ROS-dependent proapoptotic and antiangiogenic effects. Biochimie 2019; 158:165-171. [DOI: 10.1016/j.biochi.2019.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/08/2019] [Indexed: 10/27/2022]
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Scanlon SE, Hegan DC, Sulkowski PL, Glazer PM. Suppression of homology-dependent DNA double-strand break repair induces PARP inhibitor sensitivity in VHL-deficient human renal cell carcinoma. Oncotarget 2018; 9:4647-4660. [PMID: 29435132 PMCID: PMC5797003 DOI: 10.18632/oncotarget.23470] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 11/28/2017] [Indexed: 11/25/2022] Open
Abstract
The von Hippel-Lindau (VHL) tumor suppressor gene is inactivated in the vast majority of human clear cell renal carcinomas. The pathogenesis of VHL loss is currently best understood to occur through stabilization of the hypoxia-inducible factors, activation of hypoxia-induced signaling pathways, and transcriptional reprogramming towards a pro-angiogenic and pro-growth state. However, hypoxia also drives other pro-tumorigenic processes, including the development of genomic instability via down-regulation of DNA repair gene expression. Here, we find that DNA repair genes involved in double-strand break repair by homologous recombination (HR) and in mismatch repair, which are down-regulated by hypoxic stress, are decreased in VHL-deficient renal cancer cells relative to wild type VHL-complemented cells. Functionally, this gene repression is associated with impaired DNA double-strand break repair in VHL-deficient cells, as determined by the persistence of ionizing radiation-induced DNA double-strand breaks and reduced repair activity in a homology-dependent plasmid reactivation assay. Furthermore, VHL deficiency conferred increased sensitivity to PARP inhibitors, analogous to the synthetic lethality observed between hypoxia and these agents. Finally, we discovered a correlation between VHL inactivation and reduced HR gene expression in a large panel of human renal carcinoma samples. Together, our data elucidate a novel connection between VHL-deficient renal carcinoma and hypoxia-induced down-regulation of DNA repair, and identify potential opportunities for targeting DNA repair defects in human renal cell carcinoma.
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Affiliation(s)
- Susan E. Scanlon
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT, USA
- Department of Experimental Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Denise C. Hegan
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
| | - Parker L. Sulkowski
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
| | - Peter M. Glazer
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
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Kim SH, Kim H, Ku HJ, Park JH, Cha H, Lee S, Lee JH, Park JW. Oxalomalate reduces expression and secretion of vascular endothelial growth factor in the retinal pigment epithelium and inhibits angiogenesis: Implications for age-related macular degeneration. Redox Biol 2016; 10:211-220. [PMID: 27810736 PMCID: PMC5094379 DOI: 10.1016/j.redox.2016.10.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/20/2016] [Accepted: 10/21/2016] [Indexed: 11/21/2022] Open
Abstract
Clinical and experimental observations indicate a critical role for vascular endothelial growth factor (VEGF), secreted by the retinal pigment epithelium (RPE), in pathological angiogenesis and the development of choroidal neovascularization (CNV) in age-related macular degeneration (AMD). RPE-mediated VEGF expression, leading to angiogenesis, is a major signaling mechanism underlying ocular neovascular disease. Inhibiting this signaling pathway with a therapeutic molecule is a promising anti-angiogenic strategy to treat this disease with potentially fewer side effects. Oxalomalate (OMA) is a competitive inhibitor of NADP+-dependent isocitrate dehydrogenase (IDH), which plays an important role in cellular signaling pathways regulated by reactive oxygen species (ROS). Here, we have investigated the inhibitory effect of OMA on the expression of VEGF, and the associated underlying mechanism of action, using in vitro and in vivo RPE cell models of AMD. We found that OMA reduced the expression and secretion of VEGF in RPE cells, and consequently inhibited CNV formation. This function of OMA was linked to its capacity to activate the pVHL-mediated HIF-1α degradation in these cells, partly via a ROS-dependent ATM signaling axis, through inhibition of IDH enzymes. These findings reveal a novel role for OMA in inhibiting RPE-derived VEGF expression and angiogenesis, and suggest unique therapeutic strategies for treating pathological angiogenesis and AMD development. Oxalomalate reduces VEGF expression in RPE cells by promoting HIF-1α degradation. Oxalomalate activates pVHL-mediated HIF-1α degradation by regulation of ATM-Chk2-E2F1 axis. Inhibition of IDH enzymes by oxalomalate activates ROS-mediated ATM signaling axis. Oxalomalate inhibits CNV-related angiogenesis in in vivo mouse model of AMD.
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Affiliation(s)
- Sung Hwan Kim
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Hyunjin Kim
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Hyeong Jun Ku
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jung Hyun Park
- Department of Food and Biotechnology, Korea University, Sejong, Republic of Korea
| | - Hanvit Cha
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Seoyoon Lee
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jin Hyup Lee
- Department of Food and Biotechnology, Korea University, Sejong, Republic of Korea; Institutes of Natural Sciences, Korea University, Sejong, Republic of Korea.
| | - Jeen-Woo Park
- School of Life Sciences and Biotechnology, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.
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Liu X, Cai X, Hu B, Mei Z, Zhang D, Ouyang G, Wang J, Zhang W, Xiao W. Forkhead Transcription Factor 3a (FOXO3a) Modulates Hypoxia Signaling via Up-regulation of the von Hippel-Lindau Gene (VHL). J Biol Chem 2016; 291:25692-25705. [PMID: 27777301 DOI: 10.1074/jbc.m116.745471] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/20/2016] [Indexed: 01/26/2023] Open
Abstract
FOXO3a, a member of the forkhead homeobox type O (FOXO) family of transcriptional factors, regulates cell survival in response to DNA damage, caloric restriction, and oxidative stress. The von Hippel-Lindau (VHL) tumor suppressor gene encodes a component of the E3 ubiquitin ligase complex that mediates hypoxia-inducible factor α degradation under aerobic conditions, thus acting as one of the key regulators of hypoxia signaling. However, whether FOXO3a impacts cellular hypoxia stress remains unknown. Here we show that FOXO3a directly binds to the VHL promoter and up-regulates VHL expression. Using a zebrafish model, we confirmed the up-regulation of vhl by foxo3b, an ortholog of mammalian FOXO3a Furthermore, by employing the clustered regularly interspaced short palindromic repeats (CRISPR)-associated RNA-guided endonuclease Cas9 (CRISPR/Cas9) technology, we deleted foxo3b in zebrafish and determined that expression of hypoxia-inducible genes was affected under hypoxia. Moreover, foxo3b-null zebrafish exhibited impaired acute hypoxic tolerance, resulting in death. In conclusion, our findings suggest that, by modulating hypoxia-inducible factor activity via up-regulation of VHL, FOXO3a (foxo3b) plays an important role in survival in response to hypoxic stress.
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Affiliation(s)
- Xing Liu
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Xiaolian Cai
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Bo Hu
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Zhichao Mei
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Dawei Zhang
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Gang Ouyang
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Jing Wang
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Wei Zhang
- From the Key Laboratory of Aquatic Biodiversity and Conservation and
| | - Wuhan Xiao
- From the Key Laboratory of Aquatic Biodiversity and Conservation and .,State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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Robinson CM, Ohh M. The multifaceted von Hippel-Lindau tumour suppressor protein. FEBS Lett 2014; 588:2704-11. [PMID: 24583008 DOI: 10.1016/j.febslet.2014.02.026] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/14/2014] [Accepted: 02/17/2014] [Indexed: 11/26/2022]
Abstract
Loss of von Hippel-Lindau protein (pVHL) is known to contribute to the initiation and progression of tumours associated with VHL disease as well as certain sporadic tumours including clear cell renal cell carcinoma (ccRCC). The VHL gene was first identified and cloned over 20 years ago and our understanding of its functions and effects has significantly increased since then. The best-known function of pVHL is its role in promoting the degradation of hypoxia-inducible factor α subunit (HIFα) as part of an E3 ubiquitin ligase complex. HIF stabilisation and transcriptional activation are also associated with various epigenetic alterations, indicating a potential role for VHL loss with changes in the epigenome. This review will highlight current knowledge regarding pVHL as well as discuss potentially novel roles of pVHL and how these may impact on cancer progression.
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Affiliation(s)
- Claire M Robinson
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Michael Ohh
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
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