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Uzun N, Durmus S, Gercel G, Aksu B, Misirlioglu NF, Uzun H. Effects of Bosentan on Hypoxia, Inflammation and Oxidative Stress in Experimental Blunt Thoracic Trauma Model. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:1148. [PMID: 39064577 PMCID: PMC11278988 DOI: 10.3390/medicina60071148] [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: 06/13/2024] [Revised: 07/04/2024] [Accepted: 07/13/2024] [Indexed: 07/28/2024]
Abstract
Background and Objectives: In this study, we aimed to investigate the effects of bosentan, an endothelin receptor antagonist, on endothelin-1 (ET-1), hypoxia-inducible factor-1 (HIF-1), nuclear factor-kappa B (NF-κB), and tumor necrosis factor (TNF)-α as inflammation markers, pro-oxidant antioxidant balance (PAB), and total antioxidant capacity (TAC) levels as oxidative stress parameters in lung tissues of rats in an experimental model of pulmonary contusion (PC) induced by blunt thoracic trauma. Materials and Methods: Thirty-seven male Sprague-Dawley rats were divided into five groups. C: The control group (n = 6) consisted of unprocessed and untreated rats. PC3 (n = 8) underwent 3 days of PC. PC-B3 (n = 8) received 100 mg/kg bosentan and was given orally once a day for 3 days. The PC7 group (n = 7) underwent 7 days of PC, and PC-B7 (n = 8) received 100 mg/kg bosentan and was given orally once a day for 7 days. Results: ET-1, NF-κB, TNF-α, HIF-1α, and PAB levels were higher, while TAC activity was lower in all groups compared with the control (p < 0.05). There was no significant difference in ET-1 and TNF-α levels between the PC-B3 and PC-B7 groups and the control group (p < 0.05), while NF-κB, HIF-1α, and PAB levels were still higher in both the PC-B3 and PC-B7 groups than in the control group. Bosentan decreased ET-1, NF-κB, TNF-α, HIF-1α, and PAB and increased TAC levels in comparison to the nontreated groups (p < 0.05). Conclusions: Bosentan decreased the severity of oxidative stress in the lungs and reduced the inflammatory reaction in rats with PC induced by blunt thoracic trauma. This suggests that bosentan may have protective effects on lung injury mechanisms by reducing hypoxia, inflammation, and oxidative stress. If supported by similar studies, bosentan can be used in both pulmonary and emergency clinics to reduce ischemic complications, inflammation, and oxidative stress in some diseases that may be accompanied by ischemia.
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Affiliation(s)
- Nedim Uzun
- Department of Emergency, Gaziosmanpaşa Training and Research Hospital, University of Health Sciences, Istanbul 34098, Turkey;
| | - Sinem Durmus
- Department of Medical Biochemistry, Faculty of Medicine, Katip Celebi University, Izmir 35620, Turkey;
| | - Gonca Gercel
- Department of Pediatric Surgery, Istanbul Medeniyet University Göztepe Training and Research Hospital, Istanbul 34730, Turkey; (G.G.); (B.A.)
| | - Burhan Aksu
- Department of Pediatric Surgery, Istanbul Medeniyet University Göztepe Training and Research Hospital, Istanbul 34730, Turkey; (G.G.); (B.A.)
| | - Naile Fevziye Misirlioglu
- Department of Biochemistry, Gaziosmanpaşa Training and Research Hospital, University of Health Sciences, Istanbul 34098, Turkey;
| | - Hafize Uzun
- Department of Medical Biochemistry, Faculty of Medicine, Istanbul Atlas University, Istanbul 34408, Turkey
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Welch N, Mishra S, Bellar A, Kannan P, Gopan A, Goudarzi M, King J, Luknis M, Musich R, Agrawal V, Bena J, Koch CJ, Li L, Willard B, Shah YM, Dasarathy S. Differential impact of sex on regulation of skeletal muscle mitochondrial function and protein homeostasis by hypoxia-inducible factor-1α in normoxia. J Physiol 2024; 602:2763-2806. [PMID: 38761133 PMCID: PMC11178475 DOI: 10.1113/jp285339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 04/19/2024] [Indexed: 05/20/2024] Open
Abstract
Hypoxia-inducible factor (HIF)-1α is continuously synthesized and degraded in normoxia. During hypoxia, HIF1α stabilization restricts cellular/mitochondrial oxygen utilization. Cellular stressors can stabilize HIF1α even during normoxia. However, less is known about HIF1α function(s) and sex-specific effects during normoxia in the basal state. Since skeletal muscle is the largest protein store in mammals and protein homeostasis has high energy demands, we determined HIF1α function at baseline during normoxia in skeletal muscle. Untargeted multiomics data analyses were followed by experimental validation in differentiated murine myotubes with loss/gain of function and skeletal muscle from mice without/with post-natal muscle-specific Hif1a deletion (Hif1amsd). Mitochondrial oxygen consumption studies using substrate, uncoupler, inhibitor, titration protocols; targeted metabolite quantification by gas chromatography-mass spectrometry; and post-mitotic senescence markers using biochemical assays were performed. Multiomics analyses showed enrichment in mitochondrial and cell cycle regulatory pathways in Hif1a deleted cells/tissue. Experimentally, mitochondrial oxidative functions and ATP content were higher with less mitochondrial free radical generation with Hif1a deletion. Deletion of Hif1a also resulted in higher concentrations of TCA cycle intermediates and HIF2α proteins in myotubes. Overall responses to Hif1amsd were similar in male and female mice, but changes in complex II function, maximum respiration, Sirt3 and HIF1β protein expression and muscle fibre diameter were sex-dependent. Adaptive responses to hypoxia are mediated by stabilization of constantly synthesized HIF1α. Despite rapid degradation, the presence of HIF1α during normoxia contributes to lower mitochondrial oxidative efficiency and greater post-mitotic senescence in skeletal muscle. In vivo responses to HIF1α in skeletal muscle were differentially impacted by sex. KEY POINTS: Hypoxia-inducible factor -1α (HIF1α), a critical transcription factor, undergoes continuous synthesis and proteolysis, enabling rapid adaptive responses to hypoxia by reducing mitochondrial oxygen consumption. In mammals, skeletal muscle is the largest protein store which is determined by a balance between protein synthesis and breakdown and is sensitive to mitochondrial oxidative function. To investigate the functional consequences of transient HIF1α expression during normoxia in the basal state, myotubes and skeletal muscle from male and female mice with HIF1α knockout were studied using complementary multiomics, biochemical and metabolite assays. HIF1α knockout altered the electron transport chain, mitochondrial oxidative function, signalling molecules for protein homeostasis, and post-mitotic senescence markers, some of which were differentially impacted by sex. The cost of rapid adaptive responses mediated by HIF1α is lower mitochondrial oxidative efficiency and post-mitotic senescence during normoxia.
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Affiliation(s)
- Nicole Welch
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Saurabh Mishra
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Annette Bellar
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Pugazhendhi Kannan
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Amrit Gopan
- KEM Hospital, Seth GS Medical College, Mumbai, India
| | - Maryam Goudarzi
- Respiratory Medicine, Cleveland Clinic, Cleveland, Ohio, USA
| | - Jasmine King
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Mathew Luknis
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Ryan Musich
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Vandana Agrawal
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - James Bena
- Quantitative Health, Cleveland Clinic, Cleveland, Ohio, USA
| | | | - Ling Li
- Proteomics and Metabolomics Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Belinda Willard
- Proteomics and Metabolomics Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Yatrik M Shah
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Srinivasan Dasarathy
- Departments of Inflammation and Immunity, Gastroenterology & Hepatology, Cleveland Clinic, Cleveland, OH, USA
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Wang W, Zhan Y, Gao D, Lu F, Peng L, Chen Y, Han J, Xue Z. Unveiling the hidden effects of hypoxia: Pituitary damage and hormonal imbalance in fat greenling (Hexagrammos otakii). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172381. [PMID: 38604374 DOI: 10.1016/j.scitotenv.2024.172381] [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: 11/09/2023] [Revised: 03/12/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
BACKGROUND In fisheries, hypoxia stress is one of the most common environmental stresses that often lead to the death of large numbers of fish and cause significant economic losses. The pituitary, an important endocrine gland, lies below the hypothalamus region of the brain. It plays a crucial part in controlling vital physiological functions in fish, such as growth, reproduction, and responses to stress. However, the detailed mechanisms of how hypoxia affects these physiological processes via the pituitary remain largely unknown. METHODS Fat greenlings (Hexagrammous otakii) were exposed to different dissolved oxygen (DO = 7. 6 mg/L and DO = 2 mg/L) for 24 h. miRNA-mRNA association analysis of H. otakii pituitary after hypoxia stress. Detecting apoptosis in H. otakii pituitary using Tunel and qPCR. Subsequent detection of hormones in H. otakii liver, gonads and serum by ELISA. RESULTS In this study, hypoxia causes immune system disorders and inflammatory responses through the combined analysis of miRNAs and mRNAs. Subsequent verification indicated a significant accumulation of reactive oxygen species (ROS) subsequent to hypoxia treatment. The overproduction of ROS cause oxidative stress and apoptosis in the pituitary, ultimately causing pituitary damage and reduced growth hormone and luteinising hormone release. CONCLUSIONS According to the association study of miRNA-mRNA, apoptosis problems caused by hypoxia stress result in H. otakii pituitary damage. In the meantime, this work clarifies the possible impact of hypoxia-stress on the pituitary cells, as well as on the gonadal development and growth of H. otakii.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Yu Zhan
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Dongxu Gao
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Fengzhi Lu
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Lei Peng
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Yan Chen
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Jian Han
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China.
| | - Zhuang Xue
- Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, Dalian Ocean University, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China.
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Urdampilleta Otegui A, Roche Collado E. Intermittent hypoxia in sport nutrition, performance, health status and body composition. NUTR HOSP 2024; 41:224-229. [PMID: 38095103 DOI: 10.20960/nh.04692] [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] [Indexed: 02/16/2024] Open
Abstract
Introduction Intermittent hypoxia refers to the discontinuous use of low oxygen levels in normobaric environment. These conditions can be reproduced in hypoxic tents or chambers while the individual is training in different physical activity protocols. Intermittent hypoxia can affect several body systems, impacting nutrition, physical performance, health status and body composition. Therefore, it is necessary to assess protocols, regarding time and frequency of exposure, passive exposure or training in hypoxia, and the simulated altitude. At the molecular level, the hypoxia-inducible factor-1α is the primary factor mediating induction of target genes, including vascular endothelial growth factor and erythropoietin. The goal of these molecular changes is to preserve oxygen supply for cardiac and neuronal function. In addition, hypoxia produces a sympathetic adrenal activation that can increase the resting metabolic rate. Altogether, these changes are instrumental in protocols designed to improve physical performance as well as functional parameters for certain pathological disorders. In addition, nutrition must adapt to the increased energy expenditure. In this last context, performing physical activity in intermittent hypoxia improves insulin sensitivity by increasing the presence of the glucose transporter GLUT-4 in muscle membranes. These changes could also be relevant for obesity and type 2 diabetes treatment. Also, the anorectic effect of intermittent hypoxia modulates serotonin and circulating leptin levels, which may contribute to regulate food intake and favor body weight adaptation for optimal sport performance and health. All these actions suggest that intermittent hypoxia can be a very effective tool in sports training as well as in certain clinical protocols.
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Affiliation(s)
| | - Enrique Roche Collado
- Department of Applied Biology-Nutrition. Institute of Bioengineering. Universidad Miguel Hernández
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Jurčacková Z, Ciglanová D, Mudroňová D, Bárcenas-Pérez D, Cheel J, Hrčková G. Influence of standard culture conditions and effect of oleoresin from the microalga Haematococcus pluvialis on splenic cells from healthy Balb/c mice - a pilot study. In Vitro Cell Dev Biol Anim 2023; 59:764-777. [PMID: 38062299 PMCID: PMC10739404 DOI: 10.1007/s11626-023-00822-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/17/2023] [Indexed: 12/22/2023]
Abstract
In this work, we used splenocytes from healthy mice to study the effects of the two most commonly used cell culture media (A, B) with different compositions of redox reagents. The incubation of cells for 24 h resulted in a significant decrease in viability and metabolic activity of splenocytes, and the negative effects of incubation in medium B were more pronounced. In standard conditions, oxidative stress in cells was manifested by reduced mitochondrial potential, and this effect correlated with the transition of 58.3% of cells to the early stage of apoptosis under reducing conditions of medium A and up to 66.1% of cells under super-reducing conditions in medium B, suggesting altered cell physiology. High levels of ROS/RNS activated transcription factor Nrf2, superoxide dismutase 1, and catalase. The higher mRNA levels of these genes were under the conditions of medium B, whose super-reducing environment in combination with the environment of conventional incubators proved to be less suitable for the cells compared to medium A. Treatment of the cells with a lower concentration (10 µg/ml) of oleoresin obtained from the microalga H. pluvialis partially eliminated the negative effects of cultivation. Higher concentration of oleoresin (40 µg/ml) was slightly cytotoxic, due to the significant antioxidant effect of astaxanthin, the main bioactive component of the extract, which eliminated most of the ROS/RNS acting as signalling molecules. This study shows that the standard culture conditions do not reflect the physiological in vivo cell conditions; therefore, they are not generally suitable for incubation of all cell types.
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Affiliation(s)
- Zuzana Jurčacková
- Institute of Parasitology, The Slovak Academy of Sciences, Hlinkova 3, 04001, Košice, Slovakia
- Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 68, 04181, Košice, Slovakia
| | - Denisa Ciglanová
- Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 68, 04181, Košice, Slovakia
| | - Dagmar Mudroňová
- Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 68, 04181, Košice, Slovakia
| | - Daniela Bárcenas-Pérez
- Laboratory of Algal Biotechnology - Centre ALGATECH, Institute of Microbiology of the Czech Academy of Sciences, Opatovický Mlýn, 37981, Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská, 1760, 37005, České Budějovice, Czech Republic
| | - José Cheel
- Laboratory of Algal Biotechnology - Centre ALGATECH, Institute of Microbiology of the Czech Academy of Sciences, Opatovický Mlýn, 37981, Třeboň, Czech Republic.
| | - Gabriela Hrčková
- Institute of Parasitology, The Slovak Academy of Sciences, Hlinkova 3, 04001, Košice, Slovakia.
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Corner TP, Teo RZR, Wu Y, Salah E, Nakashima Y, Fiorini G, Tumber A, Brasnett A, Holt-Martyn JP, Figg WD, Zhang X, Brewitz L, Schofield CJ. Structure-guided optimisation of N-hydroxythiazole-derived inhibitors of factor inhibiting hypoxia-inducible factor-α. Chem Sci 2023; 14:12098-12120. [PMID: 37969593 PMCID: PMC10631261 DOI: 10.1039/d3sc04253g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/12/2023] [Indexed: 11/17/2023] Open
Abstract
The human 2-oxoglutarate (2OG)- and Fe(ii)-dependent oxygenases factor inhibiting hypoxia-inducible factor-α (FIH) and HIF-α prolyl residue hydroxylases 1-3 (PHD1-3) regulate the response to hypoxia in humans via catalysing hydroxylation of the α-subunits of the hypoxia-inducible factors (HIFs). Small-molecule PHD inhibitors are used for anaemia treatment; by contrast, few selective inhibitors of FIH have been reported, despite their potential to regulate the hypoxic response, either alone or in combination with PHD inhibition. We report molecular, biophysical, and cellular evidence that the N-hydroxythiazole scaffold, reported to inhibit PHD2, is a useful broad spectrum 2OG oxygenase inhibitor scaffold, the inhibition potential of which can be tuned to achieve selective FIH inhibition. Structure-guided optimisation resulted in the discovery of N-hydroxythiazole derivatives that manifest substantially improved selectivity for FIH inhibition over PHD2 and other 2OG oxygenases, including Jumonji-C domain-containing protein 5 (∼25-fold), aspartate/asparagine-β-hydroxylase (>100-fold) and histone Nε-lysine demethylase 4A (>300-fold). The optimised N-hydroxythiazole-based FIH inhibitors modulate the expression of FIH-dependent HIF target genes and, consistent with reports that FIH regulates cellular metabolism, suppressed lipid accumulation in adipocytes. Crystallographic studies reveal that the N-hydroxythiazole derivatives compete with both 2OG and the substrate for binding to the FIH active site. Derivatisation of the N-hydroxythiazole scaffold has the potential to afford selective inhibitors for 2OG oxygenases other than FIH.
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Affiliation(s)
- Thomas P Corner
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Ryan Z R Teo
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Yue Wu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Design and Optimization and Department of Chemistry, China Pharmaceutical University Nanjing 211198 China
| | - Eidarus Salah
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Yu Nakashima
- Institute of Natural Medicine, University of Toyama 2630-Sugitani 930-0194 Toyama Japan
| | - Giorgia Fiorini
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Anthony Tumber
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Amelia Brasnett
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - James P Holt-Martyn
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - William D Figg
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Xiaojin Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Design and Optimization and Department of Chemistry, China Pharmaceutical University Nanjing 211198 China
| | - Lennart Brewitz
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
| | - Christopher J Schofield
- Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford 12 Mansfield Road OX1 3TA Oxford United Kingdom
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Zhang Y, Zhang QJ, Xu WB, Zou W, Xiang XL, Gong ZJ, Cai YJ. The Multifaceted Effects of Short-Term Acute Hypoxia Stress: Insights into the Tolerance Mechanism of Propsilocerus akamusi (Diptera: Chironomidae). INSECTS 2023; 14:800. [PMID: 37887812 PMCID: PMC10607839 DOI: 10.3390/insects14100800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/28/2023]
Abstract
Plenty of freshwater species, especially macroinvertebrates that are essential to the provision of numerous ecosystem functions, encounter higher mortality due to acute hypoxia. However, within the family Chironomidae, a wide range of tolerance to hypoxia/anoxia is displayed. Propsilocerus akamusi depends on this great tolerance to become a dominant species in eutrophic lakes. To further understand how P. akamusi responds to acute hypoxic stress, we used multi-omics analysis in combination with histomorphological characteristics and physiological indicators. Thus, we set up two groups-a control group (DO 8.4 mg/L) and a hypoxic group (DO 0.39 mg/L)-to evaluate enzyme activity and the transcriptome, metabolome, and histomorphological characteristics. With blue-black chromatin, cell tightness, cell membrane invagination, and the production of apoptotic vesicles, tissue cells displayed typical apoptotic features in the hypoxic group. Although lactate dehydrogenase (LDH), alcohol dehydrogenase (ADH), catalase (CAT), and Na+/K+ -ATPase (NKA) activities were dramatically enhanced under hypoxic stress, glycogen content, and superoxide dismutase (SOD) activities were significantly reduced compared to the control group. The combined analysis of the transcriptome and metabolome, which further demonstrated, in addition to carbohydrates, including glycogen, the involvement of energy metabolism pathways, including fatty acid, protein, trehalose, and glyoxylate cycles, provided additional support for the aforementioned findings. Lactate is the end product of glycogen degradation, and HIF-1 plays an important role in promoting glycogenolysis in acute hypoxic conditions. However, we discovered that the ethanol tested under hypoxic stress likely originates from the symbiodinium of P. akamusi. These results imply that some parameters related to energy metabolism, antioxidant enzyme activities, and histomorphological features may be used as biomarkers of eutrophic lakes in Chironomus riparius larvae. The study also provides a scientific reference for assessing toxicity and favoring policies to reduce their impact on the environment.
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Affiliation(s)
- Yao Zhang
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; (Y.Z.); (W.Z.); (Z.-J.G.)
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China;
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Wuhu 241002, China
| | - Qing-Ji Zhang
- School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China;
| | - Wen-Bin Xu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China;
| | - Wei Zou
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; (Y.Z.); (W.Z.); (Z.-J.G.)
| | - Xian-Ling Xiang
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China;
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Wuhu 241002, China
| | - Zhi-Jun Gong
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; (Y.Z.); (W.Z.); (Z.-J.G.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Wuhu 241002, China
| | - Yong-Jiu Cai
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; (Y.Z.); (W.Z.); (Z.-J.G.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Wuhu 241002, China
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Wang Q, Yi J, Liu H, Luo M, Yin G, Huang Z. Iguratimod promotes functional recovery after SCI by repairing endothelial cell tight junctions. Exp Neurol 2023; 368:114503. [PMID: 37572946 DOI: 10.1016/j.expneurol.2023.114503] [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: 06/11/2023] [Revised: 07/31/2023] [Accepted: 08/09/2023] [Indexed: 08/14/2023]
Abstract
Destruction of the blood-spinal cord barrier (BSCB) after spinal cord injury (SCI) is an important factor promoting the progression of the injury. This study addressed how to repair the BSCB in order to promote the repair of injured spinal cords. Iguratimod (IGU), an anti-rheumatic drug, has been approved for clinical use. A spinal cord injury mouse model and TNF-α-stimulated bEnd.3 cells were used to investigate the effect and mechanism of IGU on injured BSCB. An intracerebroventricular osmotic pump was used to administer drugs to the SCI mouse model. The results showed that the SCI mice in the treatment group had better recovery of neurological function than the control group. Examination of the tissue revealed better repair of the BSCB in injured spinal cords after medication. According to the results from the cell model, IGU promoted the expression of tight junction proteins and reduced cell permeability. Further research found that IGU repaired the barrier function by regulating glycolysis levels in the injured endothelial cells. In studying the mechanism, IGU was found to regulate HIF-1α expression through the NF-κB pathway, thereby regulating the expression of the glycolytic enzymes related to endothelial injury. In summary, IGU promoted functional recovery in vivo by repairing the BSCB. In vitro, IGU regulated the level of glycolysis in the damaged endothelium through the NF-κB pathway, thereby repairing the tight junctions between the endothelium. Therefore, IGU may become a potential drug for treating spinal cord injury.
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Affiliation(s)
- Qian Wang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Jiang Yi
- Department of Orthopedics, Yancheng Third People's Hospital, Yancheng 224008, Jiangsu, China
| | - Hao Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Mingran Luo
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Guoyong Yin
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
| | - Zhenfei Huang
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
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Liu TS, Zhu XY, He D, You MS, You SJ. Oxygen stress on age-stage, two-sex life tables and transcriptomic response of diamondback moth (Plutella xylostella). ENVIRONMENTAL ENTOMOLOGY 2023; 52:527-537. [PMID: 36928981 DOI: 10.1093/ee/nvad010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 01/14/2023] [Accepted: 01/27/2023] [Indexed: 06/17/2023]
Abstract
Elucidating the genetic basis of local adaption is one of the important tasks in evolutionary biology. The Qinghai-Tibet Plateau has the highest biodiversity for an extreme environment worldwide, and provides an ideal natural laboratory to study adaptive evolution. The diamondback moth (DBM), Plutella xylostella, is one of the most devastating pests of the global Brassica industry. A highly heterozygous genome of this pest has facilitated its adaptation to a variety of complex environments, and so provides an ideal model to study fast adaptation. We conducted a pilot study combining RNA-seq with an age-stage, two-sex life table to study the effects of oxygen deprivation on DBM. The developmental periods of all instars were significantly shorter in the hypoxic environment. We compared the transcriptomes of DBM from Fuzhou, Fujian (low-altitude) and Lhasa, Tibet (high-altitude) under hypoxia treatment in a hypoxic chamber. Some DEGs are enriched in pathways associated with DNA replication, such as DNA repair, nucleotide excision repair, base excision repair, mismatch repair and homologous recombination. The pathways with significant changes were associated with metabolism process and cell development. Thus, we assumed that insects could adapt to different environments by regulating their metabolism. Our findings indicated that although adaptive mechanisms to hypoxia in different DBM strains could be similar, DBM individuals from Tibet had superior tolerance to hypoxia compared with those of Fuzhou. Local adaptation of the Tibetan colony was assumed to be responsible for this difference. Our research suggests novel mechanisms of insect responses to hypoxia stress.
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Affiliation(s)
- Tian-Sheng Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, P.R. China
| | - Xiang-Yu Zhu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
| | - Di He
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
| | - Min-Sheng You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
| | - Shi-Jun You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China
- BGI-Sanya, Sanya 572025, P.R. China
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Jing H, Liu Z, Wu B, Tu K, Liu Z, Sun X, Zhou L. Physiological and molecular responses to hypoxia stress in Manila clam Ruditapes philippinarum. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 257:106428. [PMID: 36889128 DOI: 10.1016/j.aquatox.2023.106428] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Hypoxia has become one of the major environmental problems in the aquaculture industry. As one of the most commercially important bivalves, Manila clam Ruditapes philippinarum may be suffering substantial mortality attributable to hypoxia. The physiological and molecular responses to hypoxia stress in Manila clam were evaluated at two levels of low dissolved oxygen: 0.5 mg/L (DO 0.5 mg/L) and 2.0 mg/L (DO 2.0 mg/L). With the prolongation of hypoxia stress, the mortality rate was 100% at 156 h under DO 0.5 mg/L. In contrast, 50% of clams survived after 240 h of stress at DO 2.0 mg/L. After the hypoxia stress, some severe structural damages were observed in gill, axe foot, hepatopancreas tissues, such as cell rupture and mitochondrial vacuolization. For the hypoxia-stressed clams, the significant rise and decline of enzyme activity (LDH and T-AOC) was observed in gills, in contrast to the reduction of glycogen content. Furthermore, the expression levels of genes related to energy metabolism (SDH, PK, Na+/K+-ATPase, NF-κB and HIF-1α) was significantly affected by the hypoxia stress. It is therefore suggested that the short-term survival of clams under hypoxia may be dependent on stress protection by antioxidants, energy allocation, and tissue energy reserves (such as glycogen stores). Despite this, the prolongation of hypoxia stress at DO 2.0 mg/L may cause the irreversible damages of cellular structures in clam tissues, eventually leading to the death of clams. We therefore support the hypothesis that the extent of hypoxia impacts on marine bivalves may be underestimated in the coastal areas.
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Affiliation(s)
- Hao Jing
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, PR. China
| | - Zhihong Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China
| | - Biao Wu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China
| | - Kang Tu
- Putian Institute of Aquaculture Science of Fujian Province, Putian, 351100, PR. China
| | - Zhengmin Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China; School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang 222005, PR. China
| | - Xiujun Sun
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China.
| | - Liqing Zhou
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao 266071, PR. China.
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Developing 3D Organoid Raft Cultures from Patient-Derived Xenografts as Rapid Models to Screen Efficacy of Experimental Therapeutics. Int J Mol Sci 2022; 23:ijms232214392. [PMID: 36430867 PMCID: PMC9698332 DOI: 10.3390/ijms232214392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022] Open
Abstract
Reliable preclinical models are needed for screening new cancer drugs. Thus, we developed an improved 3D tumor organoid model termed "organoid raft cultures" (ORCs). Development of ORCs involved culturing tumors ex vivo on collagen beds (boats) with grid supports to maintain their morphological structure. The ORCs were developed from patient-derived xenografts (PDXs) of colon cancers excised from immune-deficient mice (NOD/SCID/IL2Rgammanull). We utilized these new models to evaluate the efficacy of an investigational drug, Navitoclax (ABT-263). We tested the efficacy of ABT-263, an inhibitor of BCL-2 family proteins, in these ORCs derived from a PDX that showed high expression of antiapoptotic BCL2 family proteins (BCL-2, BCL-XL, and BCL-W). Hematoxylin and eosin staining evaluation of PDXs and corresponding ORCs indicated the retention of morphological and other histological integrity of ORCs. ORCs treated with ABT-263 showed decreased expression of antiapoptotic proteins (BCL2, BCL-XL and BCL-W) and increased proapoptotic proteins (BAX and PUMA), with concomitant activation of caspase 3. These studies support the usefulness of the ORCs, developed from PDXs, as an alternative to PDXs and as faster screening models.
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Pal S, Singh N, Dev I, Sharma V, Jagdale PR, Ayanur A, Ansari KM. TGF-β/Smad signaling pathway plays a crucial role in patulin-induced pro-fibrotic changes in rat kidney via modulation of slug and snail expression. Toxicol Appl Pharmacol 2022; 434:115819. [PMID: 34896196 DOI: 10.1016/j.taap.2021.115819] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 01/12/2023]
Abstract
Patulin (PAT) is a mycotoxin that contaminates a variety of food and foodstuffs. Earlier in vitro and in vivo findings have indicated that kidney is one of the target organs for PAT-induced toxicity. However, no study has evaluated the chronic effects of PAT exposure at environmentally relevant doses or elucidated the detailed mechanism(s) involved. Here, using in vitro and in vivo experimental approaches, we delineated the mechanism/s involved in pro-fibrotic changes in the kidney after low-dose chronic exposure to PAT. We found that non-toxic concentrations (50 nM and 100 nM) of PAT to normal rat kidney cells (NRK52E) caused a higher generation of reactive oxygen species (ROS) (mainly hydroxyl (•OH), peroxynitrite (ONOO-), and hypochlorite radical (ClO-). PAT exposure caused the activation of mitogen-activated protein kinases (MAPKs) and its downstream c-Jun/Fos signaling pathways. Moreover, our chromatin immunoprecipitation (ChIP) analysis suggested that c-Jun/Fos binds to the promoter region of Transforming growth factor beta (TGF-β1) and possibly induces its expression. Results showed that PAT-induced TGF-β1 further activates the TGF-β1/smad signaling pathways. Higher activation of slug and snail transcription factors further modulates the regulation of pro-fibrotic molecules. Similarly, in vivo results showed that PAT exposure to rats through gavage at 25 and 100 μg/kg b. wt had higher levels of kidney injury/toxicity markers namely vascular endothelial growth factor (VEGF), kidney Injury Molecule-1 (Kim-1), tissue inhibitor of metalloproteinase-1 (Timp-1), and clusterin (CLU). Additionally, histopathological analysis indicated significant alterations in renal tubules and glomeruli along with collagen deposition in PAT-treated rat kidneys. Overall, our data provide evidence of the involvement of ROS mediated MAPKs and TGF-β1/smad pathways in PAT-induced pro-fibrotic changes in the kidney via modulation of slug and snail expression.
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Affiliation(s)
- Saurabh Pal
- Food Toxicology Laboratory, Food, Drug, and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Neha Singh
- Food Toxicology Laboratory, Food, Drug, and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Indra Dev
- Food Toxicology Laboratory, Food, Drug, and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Vineeta Sharma
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Pankaj Ramji Jagdale
- Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 M. G. Marg, Lucknow 226001, Uttar Pradesh, India
| | - Anjaneya Ayanur
- Academy of Scientific and Innovative Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India; Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 M. G. Marg, Lucknow 226001, Uttar Pradesh, India
| | - Kausar Mahmood Ansari
- Food Toxicology Laboratory, Food, Drug, and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India.
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Identification of the Resveratrol Potential Targets in the Treatment of Osteoarthritis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9911286. [PMID: 34917160 PMCID: PMC8670923 DOI: 10.1155/2021/9911286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 10/13/2021] [Accepted: 11/20/2021] [Indexed: 11/17/2022]
Abstract
Objectives Osteoarthritis (OA) is a chronic joint degenerative disease and has become an important health problem for the elderly. However, there is still a lack of effective drugs for the treatment of OA. Our research combines bioinformatics and experimental strategies to determine the target of resveratrol for OA treatment. Methods First, the differentially expressed genes (DEGs) of OA joint tissues were obtained from the related microarray gene expression data. Second, resveratrol, a natural polyphenol compound, was used to screen the drug treatment target genes. Third, the drug-disease network was established, and the resveratrol target genes for OA treatment were obtained and verified through experimental verification. Results A total of 300 differentially expressed genes with 246 upregulated and 54 downregulated were found in OA joint tissues, and 310 resveratrol potential target genes were obtained. Finally, six genes, namely, CXCL1, HIF1A, IL-6, MMP3, NOX4, and PTGS2, were selected to validate the treatment effects of the resveratrol. The results showed that all six genes in human OA chondrocytes were significantly increased. In addition, in these chondrocytes, CXCL1, HIF1A, IL-6, MMP3, NOX4, and PTGS2 were reduced considerably, but HIF1A was significantly increased after resveratrol treatment. Conclusions Our data indicates that CXCL1, HIF1A, IL-6, MMP3, NOX4, and PTGS2 are all targets of resveratrol therapy. Our findings may provide valuable information for the mechanism and therapeutic of OA.
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Abstract
Abstract
Various (metallo)porphyrins and related compounds have been intensively investigated by different research groups due to their extremely important role in living organisms along with their versatile applications in technology. The design of novel porphyrinoids by core-modification, or substitution of pyrrole nitrogens, with the elements of other groups of the Periodic Table has been considered as a highly promising methodology for tuning structures and properties of porphyrinoids and thus opening new possible applications for them. Much effort has been given to the modifications of the porphyrin core with elements of the main groups, namely O, S, Se (chalcogens), and the heavier congener of nitrogen, phosphorus. In general, the porphyrin core modification by replacing nitrogens with heteroatoms is a promising and effective strategy for obtaining new compounds with unusual structures and properties (optical, electrochemical, coordinating, etc.) as well as reactivity. These novel molecules can also be employed as promising building or construction blocks in various applications in the nanotechnology area.
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Affiliation(s)
- Aleksey E. Kuznetsov
- Departamento de Química , Universidad Técnica Federico Santa María , Av. Santa María 6400 , Vitacura , Santiago 7660251 , Chile
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15
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Pillai V, Buck L, Lari E. Scavenging of reactive oxygen species mimics the anoxic response in goldfish pyramidal neurons. J Exp Biol 2021; 224:268949. [PMID: 34047778 DOI: 10.1242/jeb.238147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 04/20/2021] [Indexed: 12/11/2022]
Abstract
Goldfish are one of a few species able to avoid cellular damage during month-long periods in severely hypoxic environments. By suppressing action potentials in excitatory glutamatergic neurons, the goldfish brain decreases its overall energy expenditure. Coincident with reductions in O2 availability is a natural decrease in cellular reactive oxygen species (ROS) generation, which has been proposed to function as part of a low-oxygen signal transduction pathway. Using live-tissue fluorescence microscopy, we found that ROS production decreased by 10% with the onset of anoxia in goldfish telencephalic brain slices. Employing whole-cell patch-clamp recording, we found that, similar to severe hypoxia, the ROS scavengers N-acetyl cysteine (NAC) and MitoTEMPO, added during normoxic periods, depolarized membrane potential (severe hypoxia -73.6 to -61.4 mV, NAC -76.6 to -66.2 mV and MitoTEMPO -71.5 mV to -62.5 mV) and increased whole-cell conductance (severe hypoxia 5.7 nS to 8.0 nS, NAC 6.0 nS to 7.5 nS and MitoTEMPO 6.0 nS to 7.6 nS). Also, in a subset of active pyramidal neurons, these treatments reduced action potential firing frequency (severe hypoxia 0.18 Hz to 0.03 Hz, NAC 0.27 Hz to 0.06 Hz and MitoTEMPO 0.35 Hz to 0.08 Hz). Neither severe hypoxia nor ROS scavenging impacted action potential threshold. The addition of exogenous hydrogen peroxide could reverse the effects of the antioxidants. Taken together, this supports a role for a reduction in [ROS] as a low-oxygen signal in goldfish brain.
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Affiliation(s)
- Varshinie Pillai
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, Canada, M3A 3A7
| | - Leslie Buck
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, Canada, M3A 3A7
| | - Ebrahim Lari
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, Canada, M3A 3A7
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Markolin P, Davidson N, Hirt CK, Chabbert CD, Zamboni N, Schwank G, Krek W, Rätsch G. Identification of HIF-dependent alternative splicing in gastrointestinal cancers and characterization of a long, coding isoform of SLC35A3. Genomics 2021; 113:515-529. [PMID: 33418078 DOI: 10.1016/j.ygeno.2020.12.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 12/07/2020] [Accepted: 12/28/2020] [Indexed: 12/30/2022]
Abstract
Intra-tumor hypoxia is a common feature in many solid cancers. Although transcriptional targets of hypoxia-inducible factors (HIFs) have been well characterized, alternative splicing or processing of pre-mRNA transcripts which occurs during hypoxia and subsequent HIF stabilization is much less understood. Here, we identify many HIF-dependent alternative splicing events after whole transcriptome sequencing in pancreatic cancer cells exposed to hypoxia with and without downregulation of the aryl hydrocarbon receptor nuclear translocator (ARNT), a protein required for HIFs to form a transcriptionally active dimer. We correlate the discovered hypoxia-driven events with available sequencing data from pan-cancer TCGA patient cohorts to select a narrow set of putative biologically relevant splice events for experimental validation. We validate a small set of candidate HIF-dependent alternative splicing events in multiple human gastrointestinal cancer cell lines as well as patient-derived human pancreatic cancer organoids. Lastly, we report the discovery of a HIF-dependent mechanism to produce a hypoxia-dependent, long and coding isoform of the UDP-N-acetylglucosamine transporter SLC35A3.
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Affiliation(s)
- Philipp Markolin
- Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland; Biomedical Informatics Group, ETH Zurich, 8092 Zürich, Switzerland
| | - Natalie Davidson
- Biomedical Informatics Group, ETH Zurich, 8092 Zürich, Switzerland
| | - Christian K Hirt
- Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | | | - Nicola Zamboni
- Institute of Molecular Systems Biology, ETH Zurich, 8093 Zürich, Switzerland
| | - Gerald Schwank
- Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland; Biomedical Informatics Group, ETH Zurich, 8092 Zürich, Switzerland
| | - Wilhelm Krek
- Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Gunnar Rätsch
- Biomedical Informatics Group, ETH Zurich, 8092 Zürich, Switzerland.
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Tang Q, Xu Q, Ding C, Zhang H, Ling Y, Wu C, Fang M. HIF-1 regulates energy metabolism of the Tibetan chicken brain during embryo development under hypoxia. Am J Physiol Regul Integr Comp Physiol 2021; 320:R704-R713. [PMID: 33596720 DOI: 10.1152/ajpregu.00052.2020] [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] [Indexed: 01/01/2023]
Abstract
The Tibetan chicken (Gallus gallus; TBC) is an indigenous breed found in the Qinghai-Tibet Plateau that are well adapted to a hypoxic environment. The energy metabolism of embryonic brains in TBCs under hypoxia has been little reported. This study investigated changes in energy metabolism of the TBC brain during embryo development under hypoxia. We found that TBCs exhibited a change of glycolysis and the tricarboxylic acid cycle during embryo development under hypoxia. Hypoxia-inducible factor (HIF)-1 was potentially involved in this by directly inducing overexpression of pyruvate dehydrogenase kinase 1 (PDK1) and the glycolytic genes hexokinase 1 (HK1) and lactate dehydrogenase A (LDHA) to increase glycolysis of TBCs to adapt to hypoxia. Although these may not be unique to TBCs, as we had also found similar results in Dwarf Laying Chickens, a lowland chicken breed, TBCs had a stronger regulating ability. In summary, our study revealed that HIF-1 induced energy metabolism changes in the TBC brain via upregulating expressions of PDK1 and other HIF-1 target genes like HK1 and LDHA to increase glycolysis for TBC hypoxic adaptations during embryo development. It indicates the potential application of TBC energy metabolism research for other animals living on the Qinghai-Tibet Plateau.
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Affiliation(s)
- Qiguo Tang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qinqin Xu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Cui Ding
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Hao Zhang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yao Ling
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Changxin Wu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Meiying Fang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Abstract
Neuroanatomic and functional studies show the paraventricular (PVN) of the hypothalamus to have a central role in the autonomic control that supports cardiovascular regulation. Direct and indirect projections from the PVN preautonomic neurons to the sympathetic preganglionic neurons in the spinal cord modulate sympathetic activity. The preautonomic neurons of the PVN adjust their level of activation in response to afferent signals arising from peripheral viscerosensory receptors relayed through the nucleus tractus solitarius. The prevailing sympathetic tone is a balance between excitatory and inhibitory influences that arises from the preautonomic PVN neurons. Under physiologic conditions, tonic sympathetic inhibition driven by a nitric oxide-γ-aminobutyric acid-mediated mechanism is dominant, but in pathologic situation such as heart failure there is a switch from inhibition to sympathoexcitation driven by glutamate and angiotensin II. Angiotensin II, reactive oxygen species, and hypoxia as a result of myocardial infarction/ischemia alter the tightly regulated posttranslational protein-protein interaction of CAPON (carboxy-terminal postsynaptic density protein ligand of neuronal nitric oxide synthase (NOS1)) and PIN (protein inhibitor of NOS1) signaling mechanism. Within the preautonomic neurons of the PVN, the disruption of CAPON and PIN signaling leads to a downregulation of NOS1 expression and reduced NO bioavailability. These data support the notion that CAPON-PIN dysregulation of NO bioavailability is a major contributor to the pathogenesis of sympathoexcitation in heart failure.
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Affiliation(s)
- Susan Pyner
- Department of Biosciences, Durham University, Durham, United Kingdom.
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Elzakra N, Kim Y. HIF-1α Metabolic Pathways in Human Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1280:243-260. [PMID: 33791987 DOI: 10.1007/978-3-030-51652-9_17] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oxygen is directly involved in many key pathophysiological processes. Oxygen deficiency, also known as hypoxia, could have adverse effects on mammalian cells, with ischemia in vital tissues being the most significant (Michiels C. Physiological and pathological responses to hypoxia. Am J Pathol 164(6): 1875-1882, 2004); therefore, timely adaptive responses to variations in oxygen availability are essential for cellular homeostasis and survival. The most critical molecular event in hypoxic response is the activation and stabilization of a transcriptional factor termed hypoxia-induced factor-1 (HIF-1) that is responsible for the upregulation of many downstream effector genes, collectively known as hypoxia-responsive genes. Multiple key biological pathways such as proliferation, energy metabolism, invasion, and metastasis are governed by these genes; thus, HIF-1-mediated pathways are equally pivotal in both physiology and pathology.As we gain knowledge on the molecular mechanisms underlying the regulation of HIF-1, a great focus has been placed on elucidating the cellular function of HIF-1, particularly the role of HIF-1 in cancer pathogenesis pathways such as proliferation, invasion, angiogenesis, and metastasis. In cancer, HIF-1 is directly involved in the shift of cancer tissues from oxidative phosphorylation to aerobic glycolysis, a phenomenon known as the Warburg effect. Although targeting HIF-1 as a cancer therapy seems like an extremely rational approach, owing to the complex network of its downstream effector genes, the development of specific HIF-1 inhibitors with fewer side effects and more specificity has not been achieved. Therefore, in this review, we provide a brief background about the function of HIF proteins in hypoxia response with a special emphasis on the unique role played by HIF-1α in cancer growth and invasiveness, in the hypoxia response context.
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Affiliation(s)
- Naseim Elzakra
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA.
| | - Yong Kim
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA. .,Laboratory of Stem Cell and Cancer Epigenetics, Center for Oral Oncology Research, UCLA School of Dentistry, Los Angeles, CA, USA. .,UCLA's Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA. .,Broad Stem Cell Research Institute, Los Angeles, CA, USA.
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Gamboa M. Hemocyanin and hexamerins expression in response to hypoxia in stoneflies (Plecoptera, Insecta). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2020; 105:e21743. [PMID: 32979236 DOI: 10.1002/arch.21743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Many freshwater ecosystems worldwide undergo hypoxia events that can trigger physiological, behavioral, and molecular responses in many organisms. Among such molecular responses, the regulation of the hemocyanin (Hc) protein expression which plays a major role in oxygen transportation within aquatic insects remains poorly understood. The stoneflies (Plecoptera) are aquatic insects that possess a functional Hc in the hemolymph similar to crustacean that co-occurs with a nonfunctional Hc protein, hexamerins (Hx). However, the role of both proteins during hypoxia remains undetermined. Here, we evaluated the effect of hypoxia on the expression of Hc and Hx proteins via a comparison between hypoxia and normoxia amino acid sequence variation and protein expression pattern within 23 stonefly species. We induced short-term hypoxia in wild-caught stoneflies species, sequenced the target region of Hc and Hx by complementary DNA synthesis, characterized the protein biochemistry using sodium dodecyl sulfate-polyacrylamide gel electrophoresis, ultrafiltration, and polarographic fluorometric method, and amplified the genome region of the hypoxia-inducible factor (HIF) transcriptional response element that regulated Hc using genome walking library approach. We found a lack of Hc expression in all examined species during hypoxia conditions, despite recognition of the HIF gene region as a possible regulatory factor of Hc, suggesting that compensatory responses as metabolic changes or behavioral tracheal movements to enhance respiratory efficiency could be possible mechanics to compensate for hypoxia. A short Hc-like novel isoform was detected instead in these 23 species, possibly due to either protein degradation or alternative splicing mechanisms, suggesting that the protein could be performing a different function other than oxygen transportation. Hx during hypoxia was expressed and exhibited species-level amino acid changes, highlighting a possible role during hypoxia. Our results demonstrate that hypoxia could enable a similar potential adaptive response of multiple species regarding specific physiological requirements, thereby shedding light on community behavior in stress environments that may help us to improve conservation practices and biomonitoring.
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Affiliation(s)
- Maribet Gamboa
- Department of Civil and Environmental Engineering, Faculty of Engineering, Ehime University, Matsuyama, Japan
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21
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Mu Y, Li W, Wei Z, He L, Zhang W, Chen X. Transcriptome analysis reveals molecular strategies in gills and heart of large yellow croaker (Larimichthys crocea) under hypoxia stress. FISH & SHELLFISH IMMUNOLOGY 2020; 104:304-313. [PMID: 32544557 DOI: 10.1016/j.fsi.2020.06.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/07/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
The gills and heart are two major targets of hypoxia in fish. However, the molecular responses in fish gills and heart to hypoxia challenge remain unclear. Here, RNA-Seq technology was used to study the gene expression profiles in gills and heart of large yellow croaker (Larimichthys crocea) at 6, 24, and 48 h after hypoxia stress. A total of 1,546 and 2,746 differentially expressed genes (DEGs) were identified in gills and heart, respectively. Expression changes of nine genes in each tissue were further validated by the qPCR. Based on KEGG and Gene ontology enrichments, we found that various innate immunity-related genes, such as complement components (C1qs, C2, C3, C6, and C7), chemokines (CCL3, CCL17, CCL19, CCL25, and CXCL8_L3), chemokine receptors (CCR9, CXCR1, and CXCR3), and nitric oxide synthase (NOS), were significantly down-regulated in gills and/or heart, suggesting that innate immune processes mediated by these genes may be inhibited by hypoxia. The genes involved in both glycolysis pathway (LDHA) and tricarboxylic acid cycle (IDH2 and OGDH) were up-regulated in gills and heart of hypoxic large yellow croakers, possibly because gill and heart tissues need enough energy to accelerate gas exchange and blood circulation. Hypoxia also affected the ion transport in gills of large yellow croaker, through down-regulating the expression levels of numerous classical ion transporters, including HVCN1, SLC20A2, SLC4A4, RHBG, RHCG, and SCN4A, suggesting an energy conservation strategy to hypoxia stress. All these results indicate that the immune processes, glycolytic pathways, and ion transport were significantly altered in gills and/or heart of large yellow croaker under hypoxia, possibly contributing to maintain cellular energy balance during hypoxia. Our data, therefore, afford new information to understand the tissue-specific molecular responses of bony fish to hypoxia stress.
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Affiliation(s)
- Yinnan Mu
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Wanru Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Zuyun Wei
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Lianghua He
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Weini Zhang
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Xinhua Chen
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, PR China.
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22
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Tripathi V, Subramaniyan SA, Hwang I. Molecular and Cellular Response of Co-cultured Cells toward Cobalt Chloride (CoCl 2)-Induced Hypoxia. ACS OMEGA 2019; 4:20882-20893. [PMID: 31867478 PMCID: PMC6921254 DOI: 10.1021/acsomega.9b01474] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 11/13/2019] [Indexed: 05/16/2023]
Abstract
Cobalt chloride (CoCl2) is a well-known hypoxia mimetic mediator that induces hypoxia-like responses. CoCl2, a mediator confirmed to alleviate hypoxia-inducible factor-1 (HIF-1), has been associated with a variety of hypoxic responses. HIF-1 is the foremost transcriptionfactor that is particularly activated during hypoxia and regulates various genes. Therefore, this study aimed to investigate the cellular and molecular responses of the co-cultured cells under the influence of the CoCl2-induced hypoxic condition. Mono- and co-cultured C2C12 and 3T3-L1 cells were exposed to CoCl2, and a significant induction in HIF-1, reactive oxygen species and lipid peroxidase and a reduction in glutathione and catalase were observed. The expressions of proapoptotic genes like Bax, p53, caspase-9, and caspase-3 were notably increased, whereas the antiapoptotic gene, i.e., Bcl2, was downregulated during hypoxia in mono- as well as co-cultured C2C12 cells. However, the co-cultured C2C12 cells show significantly lower induction in oxidative stress and expression of apoptotic genes in comparison to monocultured C2C12 cells. Whereas, the co-cultured 3T3-L1 cells show comparatively higher oxidative stress and apoptotic event in comparison to monocultured 3T3-L1 cells. The reason may be the communication between the cells and some soluble factors that help in cell survival/death from hypoxia. Moreover, it may also be due to the fact that fat and muscle cells interact and communicate via proximity and mutual ability when growing together. Therefore, the co-culture system provides a unique approach to intercellular communication between the two different cell types.
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Affiliation(s)
- Vinay
Kumar Tripathi
- Department
of Animal Science and BK21 PLUS Program and Department of Animal Biotechnology, Jeonbuk National University, Jeonju 561-756, Republic of Korea
| | - Sivakumar Allur Subramaniyan
- Department
of Animal Science and BK21 PLUS Program and Department of Animal Biotechnology, Jeonbuk National University, Jeonju 561-756, Republic of Korea
| | - Inho Hwang
- Department
of Animal Science and BK21 PLUS Program and Department of Animal Biotechnology, Jeonbuk National University, Jeonju 561-756, Republic of Korea
- E-mail: . Phone/Fax: +82-063-270-2605
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23
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Chen J, Chen J, Fu H, Li Y, Wang L, Luo S, Lu H. Hypoxia exacerbates nonalcoholic fatty liver disease via the HIF-2α/PPARα pathway. Am J Physiol Endocrinol Metab 2019; 317:E710-E722. [PMID: 31430204 DOI: 10.1152/ajpendo.00052.2019] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This study aimed to investigate whether hypoxia can affect nonalcoholic fatty liver disease (NAFLD) progression and the associated mechanisms, specifically regarding the hypoxia-inducible factor (HIF)-2α/peroxisome proliferator-activated receptor (PPAR)α pathway in vitro and in vivo. Recent studies have reported that, compared with HIF-1α, HIF-2α has different effects on lipid metabolism. We propose hypoxia may exacerbate NAFLD by the HIF-2α upregulation-induced suppression of PPARα in the liver. To verify this hypothesis, a steatotic human hepatocyte (L02) cell line treated with free fatty acids and a mouse model of NAFLD fed a high-fat diet were used. Steatotic hepatocytes were treated with hypoxia, HIF-2α siRNA, PPARα agonists, and inhibitors, respectively. Meanwhile, the NAFLD mice were exposed to intermittent hypoxia or intermittent hypoxia with PPARα agonists. The relative gene expression levels of HIF-1α, HIF-2α, mitochondrial function, fatty acid β-oxidation and lipogenesis were examined. Evidence of lipid accumulation was observed, which demonstrated that, compared with normal hepatocytes, steatotic hepatocytes exhibited higher sensitivity to hypoxia. This phenomenon was closely associated with HIF-2α. Moreover, lipid accumulation in hepatocytes was ameliorated by HIF-2α silencing or a PPARα agonist, despite the hypoxia treatment. HIF-2α overexpression under hypoxic conditions suppressed PPARα, leading to PGC-1α, NRF-1, ESRRα downregulation, and mitochondrial impairment. Additionally, β-oxidation genes such as CPT1α, CPT2α, ACOX1, and ACOX2 were downregulated and lipogenesis genes including LXRα, FAS, and SCD1 were upregulated by hypoxia. Therefore, we concluded that HIF-2α overexpression induced by hypoxia aggravated NAFLD progression by suppressing fatty acid β-oxidation and inducing lipogenesis in the liver via PPARα.
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Affiliation(s)
- Jiandi Chen
- Department of Gerontology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
- Department of Endocrinology and Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Jianxu Chen
- Department of Hepatobiliary Surgery, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Huirong Fu
- Department of Gerontology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
- Department of Endocrinology and Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Yun Li
- Department of Gerontology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Lingling Wang
- Department of Gerontology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Shunkui Luo
- Department of Endocrinology and Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Hongyun Lu
- Department of Gerontology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
- Department of Endocrinology and Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
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Kovacs K, Vaczy A, Fekete K, Kovari P, Atlasz T, Reglodi D, Gabriel R, Gallyas F, Sumegi B. PARP Inhibitor Protects Against Chronic Hypoxia/Reoxygenation-Induced Retinal Injury by Regulation of MAPKs, HIF1α, Nrf2, and NFκB. Invest Ophthalmol Vis Sci 2019; 60:1478-1490. [PMID: 30973576 DOI: 10.1167/iovs.18-25936] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose In the eye, chronic hypoxia/reoxygenation (H/R) contributes to the development of a number of ocular disorders. H/R induces the production of reactive oxygen species (ROS), leading to poly(ADP-ribose) polymerase-1 (PARP1) activation that promotes inflammation, cell death, and disease progression. Here, we analyzed the protective effects of the PARP1 inhibitor olaparib in H/R-induced retina injury and investigated the signaling mechanisms involved. Methods A rat retinal H/R model was used to detect histologic and biochemical changes in the retina. Results H/R induced reductions in the thickness of most retinal layers, which were prevented by olaparib. Furthermore, H/R caused increased levels of Akt and glycogen synthase kinase-3β phosphorylation, which were further increased by olaparib, contributing to retina protection. By contrast, H/R-induced c-Jun N-terminal kinase and p38 mitogen-activated protein kinases (MAPK) phosphorylation and activation were reduced by olaparib, via mitogen-activated protein kinase phosphatase 1 (MKP-1) expression. In addition, H/R-induced hypoxia-inducible factor 1α (HIF1α) levels were decreased by olaparib, which possibly contributed to reduced VEGF expression. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) expression was slightly increased by H/R and was further activated by olaparib. Nuclear factor-κB (NFκB) was also activated by H/R through phosphorylation (Ser536) and acetylation (Lys310) of the p65 subunit, although this was significantly reduced by olaparib. Conclusions Olaparib reduced H/R-induced degenerative changes in retinal morphology. The protective mechanisms of olaparib most probably involved Nrf2 activation and ROS reduction, as well as normalization of HIF1α and related VEGF expression. In addition, olaparib reduced inflammation by NFκB dephosphorylation/inactivation, possibly via the PARP1 inhibition-MKP-1 activation-p38 MAPK inhibition pathway. PARP inhibitors represent potential therapeutics in H/R-induced retinal disease.
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Affiliation(s)
- Krisztina Kovacs
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs, Hungary
| | - Alexandra Vaczy
- Department of Anatomy, MTA-PTE PACAP Research Group, University of Pécs Medical School, Pécs, Hungary
| | - Katalin Fekete
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs, Hungary
| | - Petra Kovari
- Department of Anatomy, MTA-PTE PACAP Research Group, University of Pécs Medical School, Pécs, Hungary
| | - Tamas Atlasz
- Department of Anatomy, MTA-PTE PACAP Research Group, University of Pécs Medical School, Pécs, Hungary.,Department of Sportbiology, Faculty of Sciences, University of Pécs, Pécs, Hungary.,Szentagothai Research Centre, University of Pécs, Pécs, Hungary
| | - Dora Reglodi
- Department of Anatomy, MTA-PTE PACAP Research Group, University of Pécs Medical School, Pécs, Hungary
| | - Robert Gabriel
- Department of Biology, Faculty of Sciences, University of Pécs, Pécs, Hungary
| | - Ferenc Gallyas
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs, Hungary.,Szentagothai Research Centre, University of Pécs, Pécs, Hungary.,Nuclear-Mitochondrial Interactions Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Balazs Sumegi
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs, Hungary.,Szentagothai Research Centre, University of Pécs, Pécs, Hungary.,Nuclear-Mitochondrial Interactions Research Group, Hungarian Academy of Sciences, Budapest, Hungary
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25
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Uchenunu O, Pollak M, Topisirovic I, Hulea L. Oncogenic kinases and perturbations in protein synthesis machinery and energetics in neoplasia. J Mol Endocrinol 2019; 62:R83-R103. [PMID: 30072418 PMCID: PMC6347283 DOI: 10.1530/jme-18-0058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 08/01/2018] [Indexed: 12/17/2022]
Abstract
Notwithstanding that metabolic perturbations and dysregulated protein synthesis are salient features of cancer, the mechanism underlying coordination of cellular energy balance with mRNA translation (which is the most energy consuming process in the cell) is poorly understood. In this review, we focus on recently emerging insights in the molecular underpinnings of the cross-talk between oncogenic kinases, translational apparatus and cellular energy metabolism. In particular, we focus on the central signaling nodes that regulate these processes (e.g. the mechanistic/mammalian target of rapamycin MTOR) and the potential implications of these findings on improving the anti-neoplastic efficacy of oncogenic kinase inhibitors.
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Affiliation(s)
- Oro Uchenunu
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
| | - Michael Pollak
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
| | - Ivan Topisirovic
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
- Biochemistry Department, McGill University, Montreal, Quebec, Canada
| | - Laura Hulea
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
- Correspondence should be addressed to L Hulea:
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26
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27
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Al-Ani A, Toms D, Kondro D, Thundathil J, Yu Y, Ungrin M. Oxygenation in cell culture: Critical parameters for reproducibility are routinely not reported. PLoS One 2018; 13:e0204269. [PMID: 30325922 PMCID: PMC6191109 DOI: 10.1371/journal.pone.0204269] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 09/04/2018] [Indexed: 01/01/2023] Open
Abstract
Mammalian cell culture is foundational to biomedical research, and the reproducibility of research findings across the sciences is drawing increasing attention. While many components contribute to reproducibility, the reporting of factors that impact oxygen delivery in the general biomedical literature has the potential for both significant impact, and immediate improvement. The relationship between the oxygen consumption rate of cells and the diffusive delivery of oxygen through the overlying medium layer means parameters such as medium depth and cell type can cause significant differences in oxygenation for cultures nominally maintained under the same conditions. While oxygenation levels are widely understood to significantly impact the phenotype of cultured cells in the abstract, in practise the importance of the above parameters does not appear to be well recognized in the non-specialist research community. On analyzing two hundred articles from high-impact journals we find a large majority missing at least one key piece of information necessary to ensure consistency in replication. We propose that explicitly reporting these values should be a requirement for publication.
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Affiliation(s)
- Abdullah Al-Ani
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Derek Toms
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Douglas Kondro
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Jarin Thundathil
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Yang Yu
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Mark Ungrin
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
- * E-mail:
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28
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Iyer SR, Chaplin VD, Knapp MJ, Solomon EI. O 2 Activation by Nonheme Fe II α-Ketoglutarate-Dependent Enzyme Variants: Elucidating the Role of the Facial Triad Carboxylate in FIH. J Am Chem Soc 2018; 140:11777-11783. [PMID: 30148961 PMCID: PMC6146021 DOI: 10.1021/jacs.8b07277] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
FIH [factor inhibiting HIF (hypoxia inducible factor)] is an α-ketoglutarate (αKG)-dependent nonheme iron enzyme that catalyzes the hydroxylation of the C-terminal transactivation domain (CAD) asparagine residue in HIF-1α to regulate cellular oxygen levels. The role of the facial triad carboxylate ligand in O2 activation and catalysis was evaluated by replacing the Asp201 residue with Gly (D201G), Ala (D201A), and Glu (D201E). Magnetic circular dichroism (MCD) spectroscopy showed that the (FeII)FIH variants were all 6-coordinate (6C) and the αKG plus CAD bound FIH variants were all 5-coordinate (5C), mirroring the behavior of the wild-type ( wt) enzyme. When only αKG is bound, all FIH variants exhibited weaker FeII-OH2 bonds for the sixth ligand compared to wt, and for αKG-bound D201E this is either extremely weak or the site is 5C, demonstrating that the Asp201 residue plays an important role in the wt enzyme in ensuring that the (FeII/αKG)FIH site remains 6C. Variable-temperature, variable-field (VTVH) MCD spectroscopy showed that all of the αKG- and CAD-bound FIH variants, though 5C, have different ground-state geometric and electronic structures, which impair their oxygen activation rates. Comparison of O2 consumption to substrate hydroxylation kinetics revealed uncoupling between the two half reactions in the variants. Thus, the Asp201 residue also ensures fidelity between CAD substrate binding and oxygen activation, enabling tightly coupled turnover.
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Affiliation(s)
- Shyam R. Iyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Vanessa D. Chaplin
- Department of Chemistry, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, United States
| | - Michael J. Knapp
- Department of Chemistry, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, United States
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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29
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Yang Y, Fu Q, Wang X, Liu Y, Zeng Q, Li Y, Gao S, Bao L, Liu S, Gao D, Dunham R, Liu Z. Comparative transcriptome analysis of the swimbladder reveals expression signatures in response to low oxygen stress in channel catfish, Ictalurus punctatus. Physiol Genomics 2018; 50:636-647. [PMID: 29799804 DOI: 10.1152/physiolgenomics.00125.2017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Channel catfish is the leading aquaculture species in the US, and one of the reasons for its application in aquaculture is its relatively high tolerance against hypoxia. However, hypoxia can still cause huge economic losses to the catfish industry. Studies on hypoxia tolerance, therefore, are important for aquaculture. Fish swimbladder has been considered as an accessory respiration organ surrounded by a dense capillary countercurrent exchange system. In this regard, we conducted RNA-Seq analysis with swimbladder samples of catfish under hypoxic and normal conditions to determine if swimbladder was responsive to low oxygen treatment and to reveal genes, their expression patterns, and pathways involved in hypoxia responses in catfish. A total of 155 differentially expressed genes (DEGs) were identified from swimbladder of adult catfish, whereas a total of 2,127 DEGs were identified from swimbladder of fingerling catfish under hypoxic condition as compared with untreated controls. Subsequent pathway analysis revealed that many DEGs under hypoxia were involved in HIF signaling pathway ( nos2, eno2, camk2d2, prkcb, cdkn1a, eno1, and tfrc), MAPK signaling pathway (voltage-dependent calcium channel subunit genes), PI3K/Akt/mTOR signaling pathway ( itga6, g6pc, and cdkn1a), Ras signaling pathway ( efna3 and ksr2), and signaling by VEGF ( fn1, wasf3, and hspb1) in catfish swimbladder. This study provided insights into regulation of gene expression and their involved gene pathways in catfish swimbladder in response to low oxygen stresses.
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Affiliation(s)
- Yujia Yang
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Qiang Fu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama.,Marine Science and Engineering College, Qingdao Agricultural University , Qingdao , China
| | - Xiaozhu Wang
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Yang Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Qifan Zeng
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Yun Li
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Sen Gao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Lisui Bao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Shikai Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Dongya Gao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Rex Dunham
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Zhanjiang Liu
- Department of Biology, College of Art and Sciences, Syracuse University , Syracuse, New York
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30
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Oxygen-Induced Retinopathy from Recurrent Intermittent Hypoxia Is Not Dependent on Resolution with Room Air or Oxygen, in Neonatal Rats. Int J Mol Sci 2018; 19:ijms19051337. [PMID: 29724000 PMCID: PMC5983662 DOI: 10.3390/ijms19051337] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 04/26/2018] [Accepted: 04/27/2018] [Indexed: 12/24/2022] Open
Abstract
Preterm infants often experience intermittent hypoxia (IH) with resolution in room air (RA) or hyperoxia (Hx) between events. Hypoxia is a major inducer of vascular endothelial growth factor, which plays a key role in normal and aberrant retinal angiogenesis. This study tested the hypothesis that neonatal IH which resolved with RA is less injurious to the immature retina than IH resolved by Hx between events. Newborn rats were exposed to: (1) Hx (50% O2) with brief hypoxia (12% O2); (2) RA with 12% O2; (3) Hx with RA; (4) Hx only; or (5) RA only, from P0 to P14. Pups were examined at P14 or placed in RA until P21. Retinal vascular and astrocyte integrity; retinal layer thickness; ocular and systemic biomarkers of angiogenesis; and somatic growth were determined at P14 and P21. All IH paradigms resulted in significant retinal vascular defects, disturbances in retinal astrocyte template, retinal thickening, and photoreceptor damage concurrent with elevations in angiogenesis biomarkers. These data suggest that the susceptibility of the immature retina to changes in oxygen render no differences in the outcomes between RA or O2 resolution. Interventions and initiatives to curtail O2 variations should remain a high priority to prevent severe retinopathy.
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Santacruz L, Arciniegas AJL, Darrabie M, Mantilla JG, Baron RM, Bowles DE, Mishra R, Jacobs DO. Hypoxia decreases creatine uptake in cardiomyocytes, while creatine supplementation enhances HIF activation. Physiol Rep 2018; 5:5/16/e13382. [PMID: 28821596 PMCID: PMC5582266 DOI: 10.14814/phy2.13382] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 07/18/2017] [Indexed: 12/23/2022] Open
Abstract
Creatine (Cr), phosphocreatine (PCr), and creatine kinases (CK) comprise an energy shuttle linking ATP production in mitochondria with cellular consumption sites. Myocytes cannot synthesize Cr: these cells depend on uptake across the cell membrane by a specialized creatine transporter (CrT) to maintain intracellular Cr levels. Hypoxia interferes with energy metabolism, including the activity of the creatine energy shuttle, and therefore affects intracellular ATP and PCr levels. Here, we report that exposing cultured cardiomyocytes to low oxygen levels rapidly diminishes Cr transport by decreasing Vmax and Km. Pharmacological activation of AMP‐activated kinase (AMPK) abrogated the reduction in Cr transport caused by hypoxia. Cr supplementation increases ATP and PCr content in cardiomyocytes subjected to hypoxia, while also significantly augmenting the cellular adaptive response to hypoxia mediated by HIF‐1 activation. Our results indicate that: (1) hypoxia reduces Cr transport in cardiomyocytes in culture, (2) the cytoprotective effects of Cr supplementation are related to enhanced adaptive physiological responses to hypoxia mediated by HIF‐1, and (3) Cr supplementation increases the cellular ATP and PCr content in RNCMs exposed to hypoxia.
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Affiliation(s)
- Lucia Santacruz
- Department of Molecular Biology and Biochemistry, The University of Texas Medical Branch, Galveston, Texas .,Department of Natural Sciences, Bowie State University, Bowie, Maryland
| | - Antonio Jose Luis Arciniegas
- Department of Medicine, Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | | | | | - Rebecca M Baron
- Department of Medicine, Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Dawn E Bowles
- Duke University Medical Center, Durham, North Carolina
| | | | - Danny O Jacobs
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, Texas
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Gilglioni EH, Chang J, Duijst S, Go S, Adam AAA, Hoekstra R, Verhoeven AJ, Ishii‐Iwamoto EL, Oude Elferink RP. Improved oxygenation dramatically alters metabolism and gene expression in cultured primary mouse hepatocytes. Hepatol Commun 2018; 2:299-312. [PMID: 29507904 PMCID: PMC5831026 DOI: 10.1002/hep4.1140] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 11/11/2017] [Accepted: 12/05/2017] [Indexed: 01/04/2023] Open
Abstract
Primary hepatocyte culture is an important in vitro system for the study of liver functions. In vivo, hepatocytes have high oxidative metabolism. However, oxygen supply by means of diffusion in in vitro static cultures is much less than that by blood circulation in vivo. Therefore, we investigated whether hypoxia contributes to dedifferentiation and deregulated metabolism in cultured hepatocytes. To this end, murine hepatocytes were cultured under static or shaken (60 revolutions per minute) conditions in a collagen sandwich. The effect of hypoxia on hepatocyte cultures was examined by metabolites in media and cells, hypoxia-inducible factors (HIF)-1/2α western blotting, and real-time quantitative polymerase chain reaction for HIF target genes and key genes of glucose and lipid metabolism. Hepatocytes in shaken cultures showed lower glycolytic activity and triglyceride accumulation than static cultures, compatible with improved oxygen delivery and mitochondrial energy metabolism. Consistently, static cultures displayed significant HIF-2α expression, which was undetectable in freshly isolated hepatocytes and shaken cultures. Transcript levels of HIF target genes (glyceraldehyde 3-phosphate dehydrogenase [Gapdh], glucose transporter 1 [Glut1], pyruvate dehydrogenase kinase 1 [Pdk1], and lactate dehydrogenase A [Ldha]) and key genes of lipid metabolism, such as carnitine palmitoyltransferase 1 (Cpt1), apolipoprotein B (Apob), and acetyl-coenzyme A carboxylase 1 (Acc1), were significantly lower in shaken compared to static cultures. Moreover, expression of hepatocyte nuclear factor 4α (Hnf4α) and farnesoid X receptor (Fxr) were better preserved in shaken cultures as a result of improved oxygen delivery. We further revealed that HIF-2 signaling was involved in hypoxia-induced down-regulation of Fxr. Conclusion: Primary murine hepatocytes in static culture suffer from hypoxia. Improving oxygenation by simple shaking prevents major changes in expression of metabolic enzymes and aberrant triglyceride accumulation; in addition, it better maintains the differentiation state of the cells. The shaken culture is, therefore, an advisable strategy for the use of primary hepatocytes as an in vitro model. (Hepatology Communications 2018;2:299-312).
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Affiliation(s)
- Eduardo H. Gilglioni
- Department of Biochemistry, Laboratory of Experimental SteatosisUniversity of MaringáMaringáBrazil
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Jung‐Chin Chang
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Suzanne Duijst
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Simei Go
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Aziza A. A. Adam
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Surgical Laboratory, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Ruurdtje Hoekstra
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Surgical Laboratory, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Arthur J. Verhoeven
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Emy L. Ishii‐Iwamoto
- Department of Biochemistry, Laboratory of Experimental SteatosisUniversity of MaringáMaringáBrazil
| | - Ronald P.J. Oude Elferink
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
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Characterization of neural stem cells modified with hypoxia/neuron-specific VEGF expression system for spinal cord injury. Gene Ther 2017; 25:27-38. [PMID: 29155421 DOI: 10.1038/gt.2017.92] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 09/30/2017] [Accepted: 10/04/2017] [Indexed: 02/01/2023]
Abstract
Spinal cord injury (SCI) is an incurable disease causing an ischemic environment and functional defect, thus a new therapeutic approach is needed for SCI treatment. Vascular endothelial growth factor (VEGF) is a potent therapeutic gene to treat SCI via angiogenesis and neuroprotection, and both tissue-specific gene expression and high gene delivery efficiency are important for successful gene therapy. Here we design the hypoxia/neuron dual-specific gene expression system (pEpo-NSE) and efficient gene delivery platform can be achieved by the combination ex vivo gene therapy with erythropoietin (Epo) enhancer, neuron-specific enolase (NSE) promoter and neural stem cells (NSCs). An in vitro model, NSCs transfected with pEpo-NSE were consistently and selectively overexpressing therapeutic genes in response to neural differentiation and hypoxic conditions. Also, in SCI model, ex vivo gene therapy using pEpo-NSE system with NSCs significantly enhanced gene delivery efficiency compared with pEpo-NSE system gene therapy alone. However, microarray analysis reveals that introducing exogenous pEpo-NSE and VEGF triggers biological pathways in NSCs such as glycolysis and signaling pathways such as Ras and mitogen-activated protein kinase, leading to cell proliferation, differentiation and apoptosis. Collectively, it indicates that the pEpo-NSE gene expression system works stably in NSCs and ex vivo gene therapy using pEpo-NSE system with NSCs improves gene expression efficiency. However, exogenously introduced pEpo-NSE system has an influence on gene expression profiles in NSCs. Therefore, when we consider ex vivo gene therapy for SCI, the effects of changes in gene expression profiles in NSCs on safety should be investigated.
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Proietti S, Cucina A, Minini M, Bizzarri M. Melatonin, mitochondria, and the cancer cell. Cell Mol Life Sci 2017; 74:4015-4025. [PMID: 28785807 PMCID: PMC11107593 DOI: 10.1007/s00018-017-2612-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/03/2017] [Indexed: 12/12/2022]
Abstract
The long-recognized fact that oxidative stress within mitochondria is a hallmark of mitochondrial dysfunction has stimulated the development of mitochondria-targeted antioxidant therapies. Melatonin should be included among the pharmacological agents able to modulate mitochondrial functions in cancer, given that a number of relevant melatonin-dependent effects are triggered by targeting mitochondrial functions. Indeed, melatonin may modulate the mitochondrial respiratory chain, thus antagonizing the cancer highly glycolytic bioenergetic pathway of cancer cells. Modulation of the mitochondrial respiratory chain, together with Ca2+ release and mitochondrial apoptotic effectors, may enhance the spontaneous or drug-induced apoptotic processes. Given that melatonin may efficiently counteract the Warburg effect while stimulating mitochondrial differentiation and mitochondrial-based apoptosis, it is argued that the pineal neurohormone could represent a promising new perspective in cancer treatment strategy.
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Affiliation(s)
- Sara Proietti
- Department of Surgery, "Pietro Valdoni", Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Alessandra Cucina
- Department of Surgery, "Pietro Valdoni", Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Mirko Minini
- Department of Surgery, "Pietro Valdoni", Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Mariano Bizzarri
- Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy.
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Abstract
Pancreatic cancer is an aggressive malignancy with poor survival and high mortality rate with 250 000 deaths per year worldwide. The unique pancreatic cancer microenvironment serves as a major obstacle in the effective treatment of this malignancy. The microenvironment consists not only of pancreatic ductal adenocarcinoma cells but also comprises cells of pancreatic cancer stellate, vascular, and immune origin combined with a dense extracellular matrix containing collagen. The aforementioned pathology leads to an increased intratumor pressure combined with an erratic vascular proliferation within the tumor causing hypoxia and decreased drug delivery. This has led both scientists and clinicians to develop and study drugs with unique mechanisms of action to target the pancreatic cancer microenvironment. Herein, we discuss the pancreatic cancer hypoxic microenvironment, development of hypoxia-activated prodrugs, and results of trials utilizing those drugs to target pancreatic cancer.
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Sun S, Xuan F, Ge X, Zhu J, Zhang W. Dynamic mRNA and miRNA expression analysis in response to hypoxia and reoxygenation in the blunt snout bream (Megalobrama amblycephala). Sci Rep 2017; 7:12846. [PMID: 28993687 PMCID: PMC5634510 DOI: 10.1038/s41598-017-12537-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 09/12/2017] [Indexed: 12/24/2022] Open
Abstract
Adaptation to hypoxia is a complex process involving various pathways and regulation mechanisms. A better understanding of the genetic influence on these mechanisms could permit selection for hypoxia-sensitive fish. To aid this understanding, an integrated analysis of miRNA and mRNA expression was performed in Megalobrama amblycephala under four acute hypoxia and reoxygenation stages. A number of significantly differentially-expressed miRNAs and genes associated with oxidative stress were identified, and their functional characteristics were revealed by GO function and KEGG pathway analysis. They were found to be involved in HIF-1 pathways known to affect energy metabolism and apoptosis. MiRNA-mRNA interaction pairs were detected from comparison of expression between the four different stages. The function annotation results also showed that many miRNA-mRNA interaction pairs were likely to be involved in regulating hypoxia stress. As a unique resource for gene expression and regulation during hypoxia and reoxygenation, this study could provide a starting point for further studies to better understand the genetic background of hypoxia stress.
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Affiliation(s)
- Shengming Sun
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi, 214081, P.R. China
| | - Fujun Xuan
- Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng City, Jiangsu Province, 224002, P.R. China
| | - Xianping Ge
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi, 214081, P.R. China.
| | - Jian Zhu
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi, 214081, P.R. China.
| | - Wuxiao Zhang
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, P.R. China
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Endothelial adenosine A2a receptor-mediated glycolysis is essential for pathological retinal angiogenesis. Nat Commun 2017; 8:584. [PMID: 28928465 PMCID: PMC5605640 DOI: 10.1038/s41467-017-00551-2] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 06/21/2017] [Indexed: 01/14/2023] Open
Abstract
Adenosine/adenosine receptor-mediated signaling has been implicated in the development of various ischemic diseases, including ischemic retinopathies. Here, we show that the adenosine A2a receptor (ADORA2A) promotes hypoxia-inducible transcription factor-1 (HIF-1)-dependent endothelial cell glycolysis, which is crucial for pathological angiogenesis in proliferative retinopathies. Adora2a expression is markedly increased in the retina of mice with oxygen-induced retinopathy (OIR). Endothelial cell-specific, but not macrophage-specific Adora2a deletion decreases key glycolytic enzymes and reduces pathological neovascularization in the OIR mice. In human primary retinal microvascular endothelial cells, hypoxia induces the expression of ADORA2A by activating HIF-2α. ADORA2A knockdown decreases hypoxia-induced glycolytic enzyme expression, glycolytic flux, and endothelial cell proliferation, sprouting and tubule formation. Mechanistically, ADORA2A activation promotes the transcriptional induction of glycolytic enzymes via ERK- and Akt-dependent translational activation of HIF-1α protein. Taken together, these findings advance translation of ADORA2A as a therapeutic target in the treatment of proliferative retinopathies and other diseases dependent on pathological angiogenesis.Pathological angiogenesis in the retina is a major cause of blindness. Here the authors show that adenosine receptor A2A drives pathological angiogenesis in the oxygen-induced retinopathy mouse model by promoting glycolysis in endothelial cells via the ERK/Akt/HIF-1α pathway, thereby suggesting new therapeutic targets for disease treatment.
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Wottawa M, Naas S, Böttger J, van Belle GJ, Möbius W, Revelo NH, Heidenreich D, von Ahlen M, Zieseniss A, Kröhnert K, Lutz S, Lenz C, Urlaub H, Rizzoli SO, Katschinski DM. Hypoxia-stimulated membrane trafficking requires T-plastin. Acta Physiol (Oxf) 2017; 221:59-73. [PMID: 28218996 DOI: 10.1111/apha.12859] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 01/25/2017] [Accepted: 02/15/2017] [Indexed: 12/30/2022]
Abstract
AIM Traffic between the plasma membrane and the endomembrane compartments is an essential feature of eukaryotic cells. The secretory pathway sends cargoes from biosynthetic compartments to the plasma membrane. This is counterbalanced by a retrograde endocytic route and is essential for cell homoeostasis. Cells need to adapt rapidly to environmental challenges such as the reduction of pO2 which, however, has not been analysed in relation to membrane trafficking in detail. Therefore, we determined changes in the plasma membrane trafficking in normoxia, hypoxia, and after reoxygenation. METHODS Membrane trafficking was analysed by using the bulk membrane endocytosis marker FM 1-43, the newly developed membrane probe mCLING, wheat germ agglutinin as well as fluorescently labelled cholera toxin subunit B. Additionally, the uptake of specific membrane proteins was determined. In parallel, a non-biased SILAC screen was performed to analyse the abundance of membrane proteins in normoxia and hypoxia. RESULTS Membrane trafficking was increased in hypoxia and quickly reversed upon reoxygenation. This effect was independent of the hypoxia-inducible factor (HIF) system. Using SILAC technology, we identified that the actin-bundling protein T-plastin is recruited to the plasma membrane in hypoxia. By the use of T-plastin knockdown cells, we could show that T-plastin mediates the hypoxia-induced membrane trafficking, which was associated with an increased actin density in the cells as determined by electron microscopy. CONCLUSION Membrane trafficking is highly dynamic upon hypoxia. This phenotype is quickly reversible upon reoxygenation, which suggests that this mechanism participates in the cellular adaptation to hypoxia.
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Affiliation(s)
- M. Wottawa
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - S. Naas
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - J. Böttger
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - G. J. van Belle
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - W. Möbius
- Department of Neurogenetics; Max Planck Institute of Experimental Medicine; Göttingen Germany
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB); Göttingen Germany
| | - N. H. Revelo
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - D. Heidenreich
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - M. von Ahlen
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - A. Zieseniss
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - K. Kröhnert
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - S. Lutz
- Institute of Pharmacology; UMG; Göttingen Germany
| | - C. Lenz
- Bioanalytical Mass Spectrometry; Max Planck Institute for Biophysical Chemistry; Göttingen Germany
- Bioanalytics Research Group; Institute of Clinical Chemistry; UMG; Göttingen Germany
| | - H. Urlaub
- Bioanalytical Mass Spectrometry; Max Planck Institute for Biophysical Chemistry; Göttingen Germany
- Bioanalytics Research Group; Institute of Clinical Chemistry; UMG; Göttingen Germany
| | - S. O. Rizzoli
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - D. M. Katschinski
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
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Hypoxia Downregulates MAPK/ERK but Not STAT3 Signaling in ROS-Dependent and HIF-1-Independent Manners in Mouse Embryonic Stem Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4386947. [PMID: 28819544 PMCID: PMC5551543 DOI: 10.1155/2017/4386947] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/27/2017] [Accepted: 05/15/2017] [Indexed: 12/21/2022]
Abstract
Hypoxia is involved in the regulation of stem cell fate, and hypoxia-inducible factor 1 (HIF-1) is the master regulator of hypoxic response. Here, we focus on the effect of hypoxia on intracellular signaling pathways responsible for mouse embryonic stem (ES) cell maintenance. We employed wild-type and HIF-1α-deficient ES cells to investigate hypoxic response in the ERK, Akt, and STAT3 pathways. Cultivation in 1% O2 for 24 h resulted in the strong dephosphorylation of ERK and its upstream kinases and to a lesser extent of Akt in an HIF-1-independent manner, while STAT3 phosphorylation remained unaffected. Downregulation of ERK could not be mimicked either by pharmacologically induced hypoxia or by the overexpression. Dual-specificity phosphatases (DUSP) 1, 5, and 6 are hypoxia-sensitive MAPK-specific phosphatases involved in ERK downregulation, and protein phosphatase 2A (PP2A) regulates both ERK and Akt. However, combining multiple approaches, we revealed the limited significance of DUSPs and PP2A in the hypoxia-mediated attenuation of ERK signaling. Interestingly, we observed a decreased reactive oxygen species (ROS) level in hypoxia and a similar phosphorylation pattern for ERK when the cells were supplemented with glutathione. Therefore, we suggest a potential role for the ROS-dependent attenuation of ERK signaling in hypoxia, without the involvement of HIF-1.
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Sharma NM, Cunningham CJ, Zheng H, Liu X, Patel KP. Hypoxia-Inducible Factor-1α Mediates Increased Sympathoexcitation via Glutamatergic N-Methyl-d-Aspartate Receptors in the Paraventricular Nucleus of Rats With Chronic Heart Failure. Circ Heart Fail 2017; 9:CIRCHEARTFAILURE.116.003423. [PMID: 27810863 DOI: 10.1161/circheartfailure.116.003423] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/13/2016] [Indexed: 12/30/2022]
Abstract
BACKGROUND Increased sympathetic outflow is a major contributor to the progression of chronic heart failure (CHF). Potentiation of glutamatergic tone has been causally related to the sympathoexcitation in CHF. Specifically, an increase in the N-methyl-d-aspartate-type 1 receptor (NMDA-NR1) expression within the paraventricular nucleus (PVN) is critically linked to the increased sympathoexcitation during CHF. However, the molecular mechanism(s) for the upregulation of NMDA-NR1 remains unexplored. We hypothesized that hypoxia via hypoxia-inducible factor 1α (HIF-1α) might contribute to the augmentation of the NMDA-NR1-mediated sympathoexcitatory responses from the PVN in CHF. METHODS AND RESULTS Immunohistochemistry staining, mRNA, and protein for hypoxia-inducible factor 1α were upregulated within the PVN of left coronary artery-ligated CHF rats. In neuronal cell line (NG108-15) in vitro, hypoxia caused a significant increase in mRNA and protein for HIF-1α (2-fold) with the concomitant increase in NMDA-NR1 mRNA, protein levels, and glutamate-induced Ca+ influx. Chromatin immunoprecipitation assay identified HIF-1α binding to NMDA-NR1 promoter during hypoxia. Silencing of HIF-1α in NG108 cells leads to a significant decrease in expression of NMDA-NR1, suggesting that expression of HIF-1α is necessary for the upregulation of NMDA-NR1. Consistent with these observations, HIF-1α silencing within the PVN abrogated the increased basal sympathetic tone and sympathoexcitatory responses to microinjection of NMDA in the PVN of rats with CHF. CONCLUSIONS These results uncover a critical role for HIF-1 in the upregulation of NMDA-NR1 to mediate sympathoexcitation in CHF. We conclude that subtle hypoxia within the PVN may act as a metabolic cue to modulate sympathoexcitation during CHF.
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Affiliation(s)
- Neeru M Sharma
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Craig J Cunningham
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Hong Zheng
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Xuefei Liu
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Kaushik P Patel
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha.
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Guo S, Duan R, Wang L, Hou Y, Tan L, Cheng Q, Liao M, Ding B. Dietary α-ketoglutarate supplementation improves hepatic and intestinal energy status and anti-oxidative capacity of Cherry Valley ducks. Anim Sci J 2017; 88:1753-1762. [PMID: 28594103 DOI: 10.1111/asj.12824] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/21/2017] [Indexed: 12/25/2022]
Abstract
α-Ketoglutarate (AKG) is an extensively used dietary supplement in human and animal nutrition. The aim of the present study was to investigate effects of dietary AKG supplementation on the energy status and anti-oxidative capacity in liver and intestinal mucosa of Cherry Valley ducks. A total of 80 1-day-old ducks were randomly assigned into four groups, in which ducks were fed basal diets supplemented with 0% (control), 0.5%, 1.0% and 1.5% AKG, respectively. Graded doses of AKG supplementation linearly decreased the ratio of adenosine monophosphate (AMP) to adenosine triphosphate (ATP) in the liver, but increased ATP content and adenylate energy charge (AEC) in a quadratic and linear manner, respectively (P < 0.05). Increasing dietary AKG supplemental levels produced linear positive responses in ATP content and AEC, and negative responses in AMP concentration, the ratio of AMP to ATP and total adenine nucleotide in the ileal mucosa (P < 0.05). All levels of dietary AKG reduced the production of jejunal hydrogen peroxide and hepatic malondialdehyde (P < 0.05). Hepatic and ileal messenger RNA expression of AMP kinase α-1 and hypoxia-inducible factor-1α were linearly up-regulated as dietary AKG supplemental levels increased (P < 0.05). In conclusion, dietary AKG supplementation linearly or quadratically enhanced hepatic and intestinal energy storage and anti-oxidative capacity of Cherry Valley ducks.
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Affiliation(s)
- Shuangshuang Guo
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Rui Duan
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Lei Wang
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Yongqing Hou
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Linglin Tan
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Qiang Cheng
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Man Liao
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Binying Ding
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
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Effect of Hypoxia on Ldh-c Expression in Somatic Cells of Plateau Pika. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13080773. [PMID: 27490559 PMCID: PMC4997459 DOI: 10.3390/ijerph13080773] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/23/2016] [Accepted: 07/26/2016] [Indexed: 12/13/2022]
Abstract
Sperm specific lactate dehydrogenases (LDH-C4) is a lactate dehydrogenase that catalyzes the conversion of pyruvate to lactate. In mammals, Ldh-c was originally thought to be expressed only in testes and spermatozoa. Plateau pika (Ochotona curzoniae), which belongs to the genus Ochotona of the Ochotonidea family, is a hypoxia-tolerant mammal living 3000–5000 m above sea level on the Qinghai-Tibet Plateau, an environment which is strongly hypoxic. Ldh-c is expressed not only in testes and sperm, but also in the somatic tissues of plateau pika. To reveal the effect of hypoxia on pika Ldh-c expression, we investigated the mRNA and protein level of Ldh-c as well as the biochemical index of anaerobic glycolysis in pika somatic tissues at the altitudes of 2200 m, 3200 m and 3900 m. Our results showed that mRNA and protein expression levels of Ldh-c in the tissues of pika’s heart, liver, brain and skeletal muscle were increased significantly from 2200 m to 3200 m, but had no difference from 3200 m to 3900 m; the activities of LDH and the contents of lactate showed no difference from 2200 m to 3200 m, but were increased significantly from 3200 m to 3900 m. Hypoxia up-regulated and maintained the expression levels of Ldh-c in the pika somatic cells. Under the hypoxia condition, plateau pikas increased anaerobic glycolysis in somatic cells by LDH-C4, and that may have reduced their dependence on oxygen and enhanced their adaptation to the hypoxic environment.
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Sun S, Xuan F, Fu H, Ge X, Zhu J, Qiao H, Jin S, Zhang W. Molecular characterization and mRNA expression of hypoxia inducible factor-1 and cognate inhibiting factor in Macrobrachium nipponense in response to hypoxia. Comp Biochem Physiol B Biochem Mol Biol 2016; 196-197:48-56. [DOI: 10.1016/j.cbpb.2016.02.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 02/02/2016] [Accepted: 02/11/2016] [Indexed: 12/13/2022]
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Wei L, Li Y, Qiu L, Zhou H, Han Q, Diao X. Comparative studies of hemolymph physiology response and HIF-1 expression in different strains of Litopenaeus vannamei under acute hypoxia. CHEMOSPHERE 2016; 153:198-204. [PMID: 27016815 DOI: 10.1016/j.chemosphere.2016.03.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 03/12/2016] [Accepted: 03/14/2016] [Indexed: 06/05/2023]
Abstract
Litopenaeus vannamei has a high commercial value and is the primary cultured shellfish species globally. In this study, we have compared the hemolymph physiological responses between two L. vannamei strains under acute hypoxia. The results showed that hemocyanin concentration (HC) of strain A6410 was significantly higher than strain Zhengda; Total hemocyte counts (THC) decreased significantly in both strains under hypoxic stress (p < 0.05). We also investigated the temporal and spatial variations of hypoxia inducible factors 1 (HIF-1) by qRT-PCR. The results showed that hypoxia for 12 h increased the expression levels of HIF-1α in tissues of muscle and gill from the two strains (p < 0.05). In the hepatopancreas, the expression levels of HIF-1 increased significantly in strain Zhengda and decreased significantly in strain A6410 (p < 0.05). No significant changes of HIF-1 expression were detected in the same tissues between the two strains under hypoxia for 6 h (p > 0.05), but in the gills and hepatopancreas under hypoxia for 12 h (p < 0.05). Additionally, the expression level of HIF-1 was higher in the strain Zhengda than A6410 in the same tissue under hypoxia for 12 h. It was indicated that the hypoxic tolerance of Litopenaeus vannamei was closely correlated with the expression level of HIF-1, and the higher expression level of HIF-1 to hypoxia, the lower tolerance to hypoxia in the early stage of hypoxia. These results can help to better understand the molecular mechanisms of hypoxic tolerance and speed up the selective breeding process of hypoxia tolerance in L. vannamei.
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Affiliation(s)
- Lin Wei
- College of Agriculture, Hainan University, Haikou 570228, China
| | - Yuhu Li
- College of Agriculture, Hainan University, Haikou 570228, China
| | - Liguo Qiu
- College of Agriculture, Hainan University, Haikou 570228, China
| | - Hailong Zhou
- College of Agriculture, Hainan University, Haikou 570228, China; Haikou Key Laboratory of Environment Toxicology, Haikou 570228, China.
| | - Qian Han
- College of Agriculture, Hainan University, Haikou 570228, China
| | - Xiaoping Diao
- College of Agriculture, Hainan University, Haikou 570228, China; Haikou Key Laboratory of Environment Toxicology, Haikou 570228, China.
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Liu L, Ji P, Qu N, Pu WL, Jiang DW, Liu WY, Li YQ, Shi RL. The impact of high co-expression of Sp1 and HIF1α on prognosis of patients with hepatocellular cancer. Oncol Lett 2016; 12:504-512. [PMID: 27347172 PMCID: PMC4906840 DOI: 10.3892/ol.2016.4634] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 04/12/2016] [Indexed: 12/12/2022] Open
Abstract
Transcription factor specificity protein 1 (Sp1) and hypoxia-inducible factor 1α (HIF1α) serve vital roles in tumor growth and metastasis. The present study aimed to evaluate the impact of co-expression of Sp1 and HIF1α on the prognosis of patients with hepatocellular cancer (HCC) using The Cancer Genome Atlas (TCGA) database and to validate the association between the expression levels of Sp1/HIF1α in HCC specimens and patient survival using immunohistochemical analysis. A total of 214 eligible patients with HCC from TCGA database were collected for the study. The expression profile of Sp1 and HIF1α were obtained from the TCGA RNAseq database. Clinicopathological characteristics, including age, height, weight, gender, race, ethnicity, family cancer history, serum α-fetoprotein (AFP), surgical procedures and TNM stage were collected. The Cox proportional hazards regression model and Kaplan-Meier curves were used to assess the relative factors. Receiver operating characteristic (ROC) curves for cancer-specific survival (CSS) prediction were plotted to compare the prediction ability of expression of Sp1 and HIF1α and their co-expression. The location and expression of Sp1 and HIF1α in the HCC tissues were detected by immunohistochemistry (IHC) to verify the association between these two genes and CSS. The results demonstrated that the expressions of Sp1 and HIF1α were significantly increased in the succumbed group (P=0.001), compared with the surviving group. The CSS rates were 60.1% at 3 years (1,067 days), 35.8% at 5 years (1,823 days) and 9.5% at 10 years (3,528 days). Multivariate Cox regression analysis demonstrated that only the high expression levels of Sp1 and HIF1α (≥2×103) were independent predictors for cancer mortality, with P=0.001 and P=0.029, respectively. The area under the curve for the ROC was found to be higher using the combination testing for two genes (0.751) in predicting cancer mortality, compared to a single gene (0.632 for Sp1 and 0.717 for HIF1α). Based on the cutoff points for gene expression, patients were divided into 3 groups: G1 (both genes <2×103), G2 (either gene ≥2×103) and G3 (both genes ≥2×103). The risk of cancer mortality increased with high expression of genes, and G3 exhibited a greater risk than G2 when compared with the G1 group (HR=5.420, 95% CI 2.767–10.616, P=0.001; HR=3.270, 95% CI 1.843–5.803, P=0.001). The IHC staining results indicated that patients who died of cancer presented with significantly higher expression levels of these genes compared with those that did not (P=0.001). In summary, high expression levels of Sp1 and HIF1α in HCC tissues were associated with poor prognosis; in particular, the co-expression of these two genes increased the risk of cancer mortality.
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Affiliation(s)
- Liang Liu
- Department of Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China
| | - Ping Ji
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology of MOE/MOH, Fudan University, Shanghai 201508, P.R. China
| | - Ning Qu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China
| | - Wei-Lin Pu
- Ministry of Education Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, Fudan University, Shanghai 200433, P.R. China
| | - Dao-Wen Jiang
- Department of General Surgery, Minhang Hospital, Fudan University, Shanghai 201199, P.R. China
| | - Wei-Yan Liu
- Department of General Surgery, Minhang Hospital, Fudan University, Shanghai 201199, P.R. China
| | - Ya-Qi Li
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China
| | - Rong-Liang Shi
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China; Department of General Surgery, Minhang Hospital, Fudan University, Shanghai 201199, P.R. China
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Pogorelov AG, Smirnov AA, Pogorelova VN. Hypoxia during mammalian preimplantation development: Extreme circumstance vs. typical environment. Russ J Dev Biol 2016. [DOI: 10.1134/s1062360416020077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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Sisler JD, Pirela SV, Shaffer J, Mihalchik AL, Chisholm WP, Andrew ME, Schwegler-Berry D, Castranova V, Demokritou P, Qian Y. Toxicological Assessment of CoO and La2O3 Metal Oxide Nanoparticles in Human Small Airway Epithelial Cells. Toxicol Sci 2016; 150:418-28. [PMID: 26769336 DOI: 10.1093/toxsci/kfw005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cobalt monoxide (CoO) and lanthanum oxide (La2O3) nanoparticles are 2 metal oxide nanoparticles with different redox potentials according to their semiconductor properties. By utilizing these two nanoparticles, this study sought to determine how metal oxide nanoparticle's mode of toxicological action is related to their physio-chemical properties in human small airway epithelial cells (SAEC). We investigated cellular toxicity, production of superoxide radicals and alterations in gene expression related to oxidative stress, and cellular death at 6 and 24 h following exposure to CoO and La2O3(administered doses: 0, 5, 25, and 50 µg/ml) nanoparticles. CoO nanoparticles induced gene expression related to oxidative stress at 6 h. After characterizing the nanoparticles, transmission electron microscope analysis showed SAEC engulfed CoO and La2O3nanoparticles. CoO nanoparticles were toxic after 6 and 24 h of exposure to 25.0 and 50.0 µg/ml administered doses, whereas, La2O3nanoparticles were toxic only after 24 h using the same administered doses. Based upon the Volumetric Centrifugation Methodin vivoSedimentation, Diffusion, and Dosimetry, the dose of CoO and La2O3nanoparticles delivered at 6 and 24 h were determined to be: CoO: 1.25, 6.25, and 12.5 µg/ml; La2O3: 5, 25, and 50 µg/ml and CoO: 4, 20, and 40 µg/ml; and La2O3: 5, 25, 50 µg/ml, respectively. CoO nanoparticles produced more superoxide radicals and caused greater stimulation of total tyrosine and threonine phosphorylation at both 6 and 24 h when compared with La2O3nanoparticles. Taken together, these data provide evidence that different toxicological modes of action were involved in CoO and La2O3metal oxide nanoparticle-induced cellular toxicity.
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Affiliation(s)
- Jennifer D Sisler
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505;
| | - Sandra V Pirela
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - Justine Shaffer
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - Amy L Mihalchik
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - William P Chisholm
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - Michael E Andrew
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - Diane Schwegler-Berry
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505
| | - Vincent Castranova
- Department of Pharmaceutical Sciences, West Virginia University, Morgantown, West Virginia 26505
| | - Philip Demokritou
- T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115; and
| | - Yong Qian
- *Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505;
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Moallem SA, Mohamadpour AH, Abnous K, Sankian M, Sadeghnia HR, Tsatsakis A, Shahsavand S. Erythropoietin in the treatment of carbon monoxide neurotoxicity in rat. Food Chem Toxicol 2015; 86:56-64. [DOI: 10.1016/j.fct.2015.09.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/05/2015] [Accepted: 09/23/2015] [Indexed: 01/25/2023]
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49
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Fratta LXS, Hoss GRW, Longo L, Uribe-Cruz C, da Silveira TR, Vieira SMG, Kieling CO, dos Santos JL. Hypoxic-ischemic gene expression profile in the isolated variant of biliary atresia. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2015; 22:846-854. [DOI: 10.1002/jhbp.297] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Affiliation(s)
- Leila Xavier Sinigaglia Fratta
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Giovana Regina Weber Hoss
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Larisse Longo
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Carolina Uribe-Cruz
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Themis Reverbel da Silveira
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Sandra Maria Gonçalves Vieira
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Pediatric Hepatology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - Carlos Oscar Kieling
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Pediatric Hepatology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - Jorge Luiz dos Santos
- Experimental Laboratory of Hepatology and Gastroenterology; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Graduate Program in Gastroenterology and Hepatology; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Pediatric Hepatology Unit; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
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50
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Lukyanova LD, Kirova YI. Mitochondria-controlled signaling mechanisms of brain protection in hypoxia. Front Neurosci 2015; 9:320. [PMID: 26483619 PMCID: PMC4589588 DOI: 10.3389/fnins.2015.00320] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 08/27/2015] [Indexed: 01/06/2023] Open
Abstract
The article is focused on the role of the cell bioenergetic apparatus, mitochondria, involved in development of immediate and delayed molecular mechanisms for adaptation to hypoxic stress in brain cortex. Hypoxia induces reprogramming of respiratory chain function and switching from oxidation of NAD-related substrates (complex I) to succinate oxidation (complex II). Transient, reversible, compensatory activation of respiratory chain complex II is a major mechanism of immediate adaptation to hypoxia necessary for (1) succinate-related energy synthesis in the conditions of oxygen deficiency and formation of urgent resistance in the body; (2) succinate-related stabilization of HIF-1α and initiation of its transcriptional activity related with formation of long-term adaptation; (3) succinate-related activation of the succinate-specific receptor, GPR91. This mechanism participates in at least four critical regulatory functions: (1) sensor function related with changes in kinetic properties of complex I and complex II in response to a gradual decrease in ambient oxygen concentration; this function is designed for selection of the most efficient pathway for energy substrate oxidation in hypoxia; (2) compensatory function focused on formation of immediate adaptive responses to hypoxia and hypoxic resistance of the body; (3) transcriptional function focused on activated synthesis of HIF-1 and the genes providing long-term adaptation to low pO2; (4) receptor function, which reflects participation of mitochondria in the intercellular signaling system via the succinate-dependent receptor, GPR91. In all cases, the desired result is achieved by activation of the succinate-dependent oxidation pathway, which allows considering succinate as a signaling molecule. Patterns of mitochondria-controlled activation of GPR-91- and HIF-1-dependent reaction were considered, and a possibility of their participation in cellular-intercellular-systemic interactions in hypoxia and adaptation was proved.
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Affiliation(s)
- Ludmila D. Lukyanova
- Laboratory for Bioenergetics and Hypoxia, Institute of General Pathology and PathophysiologyMoscow, Russia
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