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Shi X, Gao F, Zhao X, Pei C, Zhu L, Zhang J, Li C, Li L, Kong X. Role of HIF in fish inflammation. FISH & SHELLFISH IMMUNOLOGY 2023; 143:109222. [PMID: 37956798 DOI: 10.1016/j.fsi.2023.109222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 11/15/2023]
Abstract
The hypoxia-inducing factor (HIF) is a central transcription factor in cellular oxygen sensing and regulation. It is common that the inflammation always appears in many diseases, like infectious diseases in fishes, and the inflammation is often accompanied by hypoxia, as a hallmark of inflammation. Besides coordinating cellular responses to low oxygen, HIF-mediated hypoxia signaling pathway is also crucial for immune responses such as the regulations of innate immune cell phenotype and function, as well as metabolic reprogramming under the inflammation. However, the understanding of the molecular mechanisms by which HIFs regulate the inflammatory response in fish is still very limited. Here, we review the characteristics of HIF as well as its roles in innate immune cells and the infections caused by bacteria and viruses. The regulatory effects of HIF on the metabolic reprogramming of innate immune cells are also discussed and the future research directions are outlooked. This paper will serve as a reference for elucidating the molecular mechanism of HIF regulating inflammation and identifying treatment strategies to target HIF for fish disease.
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Affiliation(s)
- Xiaowei Shi
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China; Sanquan Medical College, Henan Province, PR China
| | - Feng Gao
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Xianliang Zhao
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Chao Pei
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Lei Zhu
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Jie Zhang
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Chen Li
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Li Li
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China
| | - Xianghui Kong
- Engineering Lab of Henan Province for Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Henan Province, PR China.
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Gu Y, Liu W, Liu G, Li X, Lu P. Assessing the protective effects of cryptotanshinone on CoCl 2‑induced hypoxia in RPE cells. Mol Med Rep 2021; 24:739. [PMID: 34435647 PMCID: PMC8404095 DOI: 10.3892/mmr.2021.12379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 06/24/2021] [Indexed: 12/27/2022] Open
Abstract
The development of several retinal diseases is closely related to hypoxia. As a component of the Traditional Chinese medicine Salvia miltiorrhiza, the effects of cryptotanshinone (CT) on retinal cells under hypoxic conditions are not well understood. The aim of the present study was to explore how CT exerted its protective effects on retinal pigment epithelium (RPE) cells under hypoxic conditions induced by cobalt chloride (CoCl2). The effects of CT were investigated using a Cell Counting Kit-8 assay, Annexin V-FITC/PI staining, reverse transcription-quantitative PCR and western blotting in ARPE-19 cells. CT (10 and 20 µM) reduced the CoCl2-induced increase in vascular endothelial growth factor expression and hypoxia-inducible transcription factor-1α expression in ARPE-19 cells. Additionally, CT alleviated hypoxia-induced apoptosis by regulating Bcl-2 and Bax protein expression. CT treatment also reduced the increase in the mRNA levels of IL-6, IL-1β and TNF-α induced by CoCl2. In summary, CT may protect RPE cells against apoptosis and inflammation in CoCl2-induced hypoxia, and these results warrant further in vivo study into its value as a drug for treating hypoxic eye diseases.
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Affiliation(s)
- Yu Gu
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Weiming Liu
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Gaoqin Liu
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Xin Li
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Peirong Lu
- Department of Ophthalmology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
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Yang Y, Wang Z, Wang J, Lyu F, Xu K, Mu W. Histopathological, hematological, and biochemical changes in high-latitude fish Phoxinus lagowskii exposed to hypoxia. FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:919-938. [PMID: 33860915 DOI: 10.1007/s10695-021-00947-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/29/2021] [Indexed: 05/20/2023]
Abstract
Hypoxia is one of the most significant threats to biodiversity in aquatic systems. The ability of high-latitude fish to tolerate hypoxia with histological and physiological responses is mostly unknown. We address this knowledge gap by investigating the effects of exposures to different oxygen levels using Phoxinus lagowskii (a high-latitude, cold-water fish) as a model. Fish were exposed to different oxygen levels (0.5 mg/L and 3 mg/L) for 24 h. The loss of equilibrium (LOE), an indicator of acute hypoxia tolerance, was 0.21 ± 0.01 mg/L, revealing the ability of fish to tolerate low-oxygen conditions. We sought to determine if, in P. lagowskii, the histology of gills and liver, blood indicators, enzyme activities of carbohydrate and lipid metabolism, and antioxidants changed to relieve stress in response to acute hypoxia. Notably, changes in vigorous jumping behavior under low oxygen revealed the exceptional hypoxia acclimation response compared with other low-latitude fish. A decrease in blood parameters, including RBC, WBC, and Hb, as well as an increase in MCV was observed compared to the controls. The increased total area in lamella and decreased ILCM volume in P. lagowskii gills were detected in the present study. Our results also showed the size of vacuoles in the livers of the hypoxic fish shrunk. Interestingly, an increase in the enzyme activity of lipid metabolism but not glucose metabolism was observed in the groups exposed to hypoxia at 6 h and 24 h. After combining histology and physiology results, our findings provide evidence that lipid metabolism plays a crucial role in enhancing hypoxia acclimation in P. lagowskii. Additionally, SOD activity significantly increased during hypoxia, suggesting the presence of an antioxidant response of P. lagowskii during hypoxia. High expression levels of lipogenesis and lipolysis-related genes were detected in the 6 h 3 mg/L and 24 h 3 mg/L hypoxia group. Enhanced expression of lipid-metabolism genes (ALS4, PGC-1, and FASN) was detected during hypoxia exposure. Together, these data suggest that P. lagowskii's ability to tolerate hypoxic events is likely mediated by a comprehensive strategy.
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Affiliation(s)
- Yuting Yang
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - Zhen Wang
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - Jing Wang
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - Fengming Lyu
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - Kexin Xu
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China
| | - Weijie Mu
- Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China.
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Dai YW, Lu XJ, Jiang R, Lu JF, Yang GJ, Chen J. Hypoxia-inducible factor-1α involved in macrophage regulation in ayu (Plecoglossus altivelis) under hypoxia. Comp Biochem Physiol B Biochem Mol Biol 2021; 254:110575. [PMID: 33609806 DOI: 10.1016/j.cbpb.2021.110575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 11/17/2022]
Abstract
Hypoxia-inducible factor-1α (HIF-1α) plays a critical role in immune and inflammatory responses and is important in controlling a variety of processes in monocytes and macrophages. However, the role of HIF-1α in the teleost immune system remains less known. In this study, we cloned the cDNA sequence of HIF-1α from the ayu (Plecoglossus altivelis, PaHIF-1α). Sequence and phylogenetic tree analysis showed that PaHIF-1α clustered within the fish HIF-1α tree and was closely related to that of Northern pike (Esox lucius). PaHIF-1α was expressed in all tested tissues and expression increased in liver, head kidney, and body kidney upon Vibrio anguillarum infection. PaHIF-1α was found to regulate the expression of cytokines in ayu monocytes/macrophages (MO/MФ). PaHIF-1α mediated hypoxia-induced enhancement of MO/MФ phagocytic and bactericidal activities to enhance host defenses. Compared with the control, intermittent hypoxia further increased the expression of PaHIF-1α mRNA, improved the survival rate, and reduced the bacterial load of V. anguillarum-infected ayu. Therefore, PaHIF-1α may play a predominant role in the modulation of ayu MO/MФ function.
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Affiliation(s)
- You-Wu Dai
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Xin-Jiang Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), China.
| | - Rui Jiang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Jian-Fei Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Guan-Jun Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Jiong Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo 315211, China; Laboratory of Biochemistry and Molecular Biology, School of Marine Sciences, Ningbo University, Ningbo 315211, China; Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China.
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Wang C, Wu X, Hu X, Jiang H, Chen L, Xu Q. Hypoxia-inducible factor 1α from a high-altitude fish enhances cytoprotection and elevates nitric oxide production in hypoxic environment. FISH PHYSIOLOGY AND BIOCHEMISTRY 2020; 46:39-49. [PMID: 31595407 DOI: 10.1007/s10695-019-00694-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
Hypoxia-inducible factors (HIFs) are master transcription factor regulating hypoxic responses in vertebrates. Species of Schizothoracine, a sub-family of cyprinidae, are highly endemic to the hypoxic Qinghai-Tibetan Plateau (QTP). What roles the HIFs play in hypoxic adaptation in the Schizothoracine fish is little known. In this study, the HIF-1α/B gene from Gymnocypris dobula (Gd) was characterized. The predicted protein for Gd-HIF-1α/B contains the main domains (bHLH, PAS, PAC, ODD, N-TAD, and C-TAD). Moreover, a specific mutation that the proline hydroxylation motif (LXXLAP) mutated into PxxLAP was observed in Gd-HIF-1α/B CODD domain, which may lead to changes in the function. To clarify whether HIF-1α/B of G. dobula possesses hypoxic adaptive features, Gd-HIF1α/B and Schizothorax prenanti-HIF1α/B (Sp-HIF1α/B) were cloned into an expression vector and transfected into 293T cells. Cell viability was found to be significantly higher in cells transfected with Gd-HIF-1α/B than those transfected with Sp-HIF-1α/B under hypoxic conditions. In addition, G. dobula HIF-1α/B showed stronger activity in transactivating the expression of nitric oxide (NO)-synthesizing enzyme, NOS2B under hypoxia stresses than the orthologous gene from S. prenanti, which were accompanied with upregulated expressions of NOS2B in heart of G. dobula, which may attribute to elevated NO levels detected in G. dobula than the lower land species. These results indicated that the HIF-1α plays an important role in mediating the iNOS signaling system in the process of evolutionary adaptation of the Schizothoracine to the highland environment.
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Affiliation(s)
- Congcong Wang
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China
- Key Laboratory of Aquaculture Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China
| | - Xiaohui Wu
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China
| | - Xingxing Hu
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China
| | - Huapeng Jiang
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China
| | - Liangbiao Chen
- Key Laboratory of Aquaculture Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China.
| | - Qianghua Xu
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai, 201306, People's Republic of China.
- National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai, 201306, People's Republic of China.
- Collaborative Innovation Center for Distant-water Fisheries, Shanghai, 201306, China.
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Feng X, Yu X, Pang M, Tong J. Molecular characterization and expression regulation of the factor-inhibiting HIF-1 (FIH-1) gene under hypoxic stress in bighead carp (Aristichthys nobilis). FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:657-665. [PMID: 30607683 DOI: 10.1007/s10695-018-0597-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023]
Abstract
Factor-inhibiting HIF-1 (FIH-1) is an asparagine hydroxylase that interacts with hypoxia-inducible factor 1α (HIF-1α) to regulate transcriptional activity of HIF-1. Few studies of fish FIH-1 have been reported to date. In this study, the cDNA of FIH-1 gene was cloned and characterized for bighead carp, Aristichthys nobilis (AnFIH-1). The AnFIH-1 cDNA is 2065 bp in length, encoding a protein of 357 amino acid (aa) residues, which contains a JmjC homology region of the jumonji transcription factors. AnFIH-1 shares high identities with other vertebrate FIH-1 (79.1-96.4%), especially in the JmjC homology region, suggesting its conserved function. During the embryonic stages of A. nobilis, AnFIH-1 had significantly high expression levels in unfertilized egg and blastula. In healthy tissues, its predominant mRNA expression was detected in muscle. The mRNA levels of AnFIH-1 were significantly upregulated in the liver, gill, hypothalamus, and spleen after hypoxic treatment, and then decreased to pretreatment levels after 6-h re-oxygenation. However, in the muscle, continual increasing of mRNA expression was observed after hypoxic shock and re-oxygenation. These results indicate that FIH-1 may play an important role in physiological regulation for adapting to hypoxia stress in A. nobilis.
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Affiliation(s)
- Xiu Feng
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xiaomu Yu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Meixia Pang
- School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen, 518055, China
| | - Jingou Tong
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
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Li X, Wang T, Yin S, Zhang G, Cao Q, Wen X, Zhang H, Wang D, Zhu W. The improved energy metabolism and blood oxygen-carrying capacity for pufferfish, Takifugu fasciatus, against acute hypoxia under the regulation of oxygen sensors. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:323-340. [PMID: 30225749 DOI: 10.1007/s10695-018-0565-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Hypoxia frequently occurs in aquatic ecosystem, which is influenced by salinity, water temperature, weather, and surface water runoff. In order to shed further light on the evolutionary and adaptive mechanisms in fish under hypoxic condition, the impact of acute hypoxia (1.63 ± 0.2 mg/L) and reoxygenation (7.0 ± 0.3 mg/L) on oxygen sensors, energy metabolism, and hematological indices was evaluated in Takifugu fasciatus. Data from transcriptional level analysis show that the expressions of genes related to oxygen sensors (HIF-1α, PHD2, and VHL) were upregulated in the brain and liver under hypoxia and recovered under reoxygenation. The upregulation of GLUT2, VEGF-A, and EPO in conjugation with VEGF-A protein and hematological indices conferred the rapid adjustments of cellular glucose uptake and blood oxygen-carrying capacities in pufferfish. Higher levels of glycolysis-related mRNAs (HK, PGK1, and PGAM2), HK activity, and proteins (PGK1 and PGAM2) were detected in the brain and liver under hypoxic condition compared with control. Interestingly, the expression of MDH1 at the mRNA, enzyme activity, and protein levels was significantly increased in the brain at 0 or 2 h and in the liver at 8 h under hypoxic condition. In addition, although the enzyme activity and mRNA expression of LDH in the brain were not significantly changed, a persistent upregulation was observed in the liver during hypoxia exposure. This study demonstrated that pufferfish could counterpoise the energetic demands and hematological functional properties evoked by oxygen sensors after hypoxia. Our findings provided new insights into the molecular regulatory mechanism of hypoxia in pufferfish.
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Affiliation(s)
- Xinru Li
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Tao Wang
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China.
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China.
| | - Shaowu Yin
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China.
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China.
| | - Guosong Zhang
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Quanquan Cao
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Xin Wen
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Hongye Zhang
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Dan Wang
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
| | - Wenxu Zhu
- College of Marine Science and Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Jiangsu, China
- Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005, Jiangsu, China
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Satora L, Mytych J, Bilska-Kos A. The presence and expression of the HIF-1α in the respiratory intestine of the bronze Corydoras Corydoras aeneus (Callichthyidae Teleostei). FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:1291-1297. [PMID: 29796973 DOI: 10.1007/s10695-018-0520-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 05/10/2018] [Indexed: 06/08/2023]
Abstract
Bronze corydoras (Corydoras aeneus) is a small diurnal activity fish from South America. Under hypoxia conditions, it uses the posterior part of the intestine as an accessory respiratory organ. The present PCR studies demonstrated higher expression of HIF-1α (hypoxia-inducible factor) gene in the respiratory than that in digestive part of bronze corydoras intestine. Further, immunolocalization studies using antibodies specific to HIF-1α and transmission electron microscopy (TEM) revealed the presence of HIF-1α epitopes in the intestine of Corydoras aeneus. In the respiratory intestine, the numerous clusters of gold particles visualizing HIF-1α antibody were observed within fibroblasts, whereas in the digestive tract of this species, single gold grains in the epithelial cells were noted. On the other hand, the presence of HIF-1α and the cytoplasmic domain of the epidermal growth factor receptor (EGFR) in the respiratory intestine of bronze corydoras assumes their interactions in the system where these factors appeared for the first time. The non-obligatory air-breathing fishes using their digestive tract as an accessory respiratory organ during hypoxia conditions are very interesting for the studies of the processes that control HIF-1α expression and squamous cell proliferation.
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Affiliation(s)
- Leszek Satora
- Department of Animal Physiology and Reproduction, University of Rzeszow, Werynia 502, 36-100, Kolbuszowa, Poland.
| | - Jennifer Mytych
- Department of Animal Physiology and Reproduction, University of Rzeszow, Werynia 502, 36-100, Kolbuszowa, Poland
| | - Anna Bilska-Kos
- Department of Plant Biochemistry and Physiology, Plant Breeding and Acclimatization Institute-National Research Institute, Radzików, 05-870, Błonie, Poland
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Liu W, Liu X, Wu C, Jiang L. Transcriptome analysis demonstrates that long noncoding RNA is involved in the hypoxic response in Larimichthys crocea. FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:1333-1347. [PMID: 29948448 DOI: 10.1007/s10695-018-0525-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
The large yellow croaker (Larimichthys crocea) has low hypoxia tolerance compared with other fish species, and the mRNA levels of hypoxia-inducible factor (HIF)-1α in its brain do not change markedly under hypoxic conditions. In this study, we investigated noncoding transcription in the hypoxic response mechanism of L. crocea. We generated a catalog of long noncoding RNAs (lncRNAs) from the brain of L. crocea individuals under hypoxic stress, investigated lncRNA expression patterns, and analyzed the HIF signaling pathway by RNA sequencing. Prolyl hydroxylase domain 2 (PHD2) expression significantly increased after 6 and 12 h of hypoxia, and a lncRNA (Linc_06633.1) was found in the upstream, antisense region of PHD2. Linc_06633.1 may be an important regulator that promotes PDH2 expression under hypoxia in L. crocea, and we constructed a regulatory profile of L. crocea under hypoxic conditions. To the best of our knowledge, it is the first study that has been conducted on hypoxia signaling pathway regulation by lncRNAs in L. crocea and elucidates the role played by lncRNAs in the regulation of the hypoxia stress response in teleost fish.
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Affiliation(s)
- Wei Liu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, People's Republic of China
| | - Xiaoxu Liu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, People's Republic of China
| | - Changwen Wu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, People's Republic of China
| | - Lihua Jiang
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, People's Republic of China.
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