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Ruan H, Zhang Q, Zhang YP, Li SS, Ran X. Unraveling the role of HIF-1α in sepsis: from pathophysiology to potential therapeutics-a narrative review. Crit Care 2024; 28:100. [PMID: 38539163 PMCID: PMC10976824 DOI: 10.1186/s13054-024-04885-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/20/2024] [Indexed: 04/06/2024] Open
Abstract
Sepsis is characterized by organ dysfunction resulting from a dysregulated inflammatory response triggered by infection, involving multifactorial and intricate molecular mechanisms. Hypoxia-inducible factor-1α (HIF-1α), a notable transcription factor, assumes a pivotal role in the onset and progression of sepsis. This review aims to furnish a comprehensive overview of HIF-1α's mechanism of action in sepsis, scrutinizing its involvement in inflammatory regulation, hypoxia adaptation, immune response, and organ dysfunction. The review encompasses an analysis of the structural features, regulatory activation, and downstream signaling pathways of HIF-1α, alongside its mechanism of action in the pathophysiological processes of sepsis. Furthermore, it will delve into the roles of HIF-1α in modulating the inflammatory response, including its association with inflammatory mediators, immune cell activation, and vasodilation. Additionally, attention will be directed toward the regulatory function of HIF-1α in hypoxic environments and its linkage with intracellular signaling, oxidative stress, and mitochondrial damage. Finally, the potential therapeutic value of HIF-1α as a targeted therapy and its significance in the clinical management of sepsis will be discussed, aiming to serve as a significant reference for an in-depth understanding of sepsis pathogenesis and potential therapeutic targets, as well as to establish a theoretical foundation for clinical applications.
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Affiliation(s)
- Hang Ruan
- Department of Critical-Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, Wuhan, 430030, People's Republic of China
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qin Zhang
- Department of Anesthesiology, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - You-Ping Zhang
- Department of Critical-Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, Wuhan, 430030, People's Republic of China
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shu-Sheng Li
- Department of Critical-Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, Wuhan, 430030, People's Republic of China.
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Xiao Ran
- Department of Critical-Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, Wuhan, 430030, People's Republic of China.
- Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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2
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Zhao H, Sun L, Liu J, Shi B, Zhang Y, Qu-Zong CR, Dorji T, Wang T, Yuan H, Yang J. Meta-analysis identifying gut microbial biomarkers of Qinghai-Tibet Plateau populations and the functionality of microbiota-derived butyrate in high-altitude adaptation. Gut Microbes 2024; 16:2350151. [PMID: 38715346 PMCID: PMC11086029 DOI: 10.1080/19490976.2024.2350151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 04/26/2024] [Indexed: 05/12/2024] Open
Abstract
The extreme environmental conditions of a plateau seriously threaten human health. The relationship between gut microbiota and human health at high altitudes has been extensively investigated. However, no universal gut microbiota biomarkers have been identified in the plateau population, limiting research into gut microbiota and high-altitude adaptation. 668 16s rRNA samples were analyzed using meta-analysis to reduce batch effects and uncover microbiota biomarkers in the plateau population. Furthermore, the robustness of these biomarkers was validated. Mendelian randomization (MR) results indicated that Tibetan gut microbiota may mediate a reduced erythropoietic response. Functional analysis and qPCR revealed that butyrate may be a functional metabolite in high-altitude adaptation. A high-altitude rat model showed that butyrate reduced intestinal damage caused by high altitudes. According to cell experiments, butyrate may downregulate hypoxia-inducible factor-1α (HIF-1α) expression and blunt cellular responses to hypoxic stress. Our research found universally applicable biomarkers and investigated their potential roles in promoting human health at high altitudes.
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Affiliation(s)
- Hongwen Zhao
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Longjie Sun
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jiali Liu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Bin Shi
- Key Laboratory of Environmental Nanotechnology and Health Effects Research, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Yaopeng Zhang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ci-Ren Qu-Zong
- State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- College of Ecology and Environment, Tibet University, Tibet, China
| | - Tsechoe Dorji
- State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Tieyu Wang
- Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, China
| | - Hongli Yuan
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jinshui Yang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China
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3
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Kundu S, Nayak S, Rakshit D, Singh T, Shukla R, Khatri DK, Mishra A. The microbiome-gut-brain axis in epilepsy: pharmacotherapeutic target from bench evidence for potential bedside applications. Eur J Neurol 2023; 30:3557-3567. [PMID: 36880679 DOI: 10.1111/ene.15767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/27/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023]
Abstract
The gut-brain axis augments the bidirectional communication between the gut and brain and modulates gut homeostasis and the central nervous system through the hypothalamic-pituitary-adrenal axis, enteroendocrine system, neuroendocrine system, inflammatory and immune pathways. Preclinical and clinical reports showed that gut dysbiosis might play a major regulatory role in neurological diseases such as epilepsy, Parkinson's, multiple sclerosis, and Alzheimer's disease. Epilepsy is a chronic neurological disease that causes recurrent and unprovoked seizures, and numerous risk factors are implicated in developing epilepsy. Advanced consideration of the gut-microbiota-brain axis can reduce ambiguity about epilepsy pathology, antiepileptic drugs, and effective therapeutic targets. Gut microbiota sequencing analysis reported that the level of Proteobacteria, Verrucomicrobia, Fusobacteria, and Firmicutes was increased and the level of Actinobacteria and Bacteroidetes was decreased in epilepsy patients. Clinical and preclinical studies also indicated that probiotics, ketogenic diet, faecal microbiota transplantation, and antibiotics can improve gut dysbiosis and alleviate seizure by enhancing the abundance of healthy biota. This study aims to give an overview of the connection between gut microbiota, and epilepsy, how gut microbiome changes may cause epilepsy, and whether gut microbiome restoration could be used as a treatment for epilepsy.
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Affiliation(s)
- Snehashis Kundu
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, India
| | - Sudipta Nayak
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, India
| | - Debarati Rakshit
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, India
| | - Tanveer Singh
- Department of Neuroscience and Experimental Therapeutics, College of Medicine, Texas A&M University Health Science Center, Bryan, Texas, USA
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, India
| | - Dharmendra Kumar Khatri
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, India
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4
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Chiba T, Maeda T. Human Milk Exosomes Induce ZO-1 Expression via Inhibition of REDD1 Expression in Human Intestinal Epithelial Cells. Biol Pharm Bull 2023; 46:893-897. [PMID: 37394640 DOI: 10.1248/bpb.b22-00880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Human milk exosomes (HMEs) enhance intestinal barrier function and contribute to an improvement in inflammation and mucosal injury, such as necrotizing enteritis (NEC), in infants. Here, we aimed to elucidate the intracellular factors involved in HME-induced expression of zonula occludens-1 (ZO-1), a tight junction protein, in Caco-2 human intestinal epithelial cells. HME treatment for 72 h significantly increased transepithelial electrical resistance in these cells. The mean ZO-1 protein levels in cells treated with HME for 72 h were significantly higher than those in the control cells. The mRNA and protein levels of regulated in development and DNA damage response 1 (REDD1) in HME-treated cells were significantly lower than those in the control cells. Although HME treatment did not increase the mechanistic target of rapamycin (mTOR) level in Caco-2 cells, it significantly increased the phosphorylated mTOR (p-mTOR) level and p-mTOR/mTOR ratio. The ZO-1 protein levels in cells treated with an inducer of REDD1, cobalt chloride (CoCl2) alone were significantly lower than those in the control cells. However, ZO-1 protein levels in cells co-treated with HME and CoCl2 were significantly higher than those in cells treated with CoCl2 alone. Additionally, REDD1 protein levels in cells treated with CoCl2 alone were significantly higher than those in the control cells. However, REDD1 protein levels in cells co-treated with HME and CoCl2 were significantly lower than those in cells treated with CoCl2 alone. This HME-mediated effect may contribute to the development of barrier function in the infant intestine and protect infants from diseases.
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Affiliation(s)
- Takeshi Chiba
- Faculty of Pharmaceutical Sciences, Hokkaido University of Science
- Creation Research Institute of Life Science in KITA-no-DAICHI, Hokkaido University of Science
| | - Tomoji Maeda
- Department of Clinical Pharmacology and Pharmaceutics, Nihon Pharmaceutical University
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Liu R, Wang SM, Guo SJ, Ma MM, Fu YL. Histone deacetylase inhibitor attenuates intestinal mucosal injury in fatally scalded rats. ANNALS OF TRANSLATIONAL MEDICINE 2022; 10:54. [PMID: 35282042 PMCID: PMC8848362 DOI: 10.21037/atm-21-5766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/30/2021] [Indexed: 11/06/2022]
Abstract
Background Severe burns, trauma and shock can cause intestinal epithelial barrier dysfunction, which can lead to intestinal endotoxemia and even sepsis and multi-organ dysfunction. Many studies have shown that histone deacetylase inhibitors (HDACIs) can improve cell tolerance to hypoxia and inflammation, thus protecting the functions of important organs in the body, and at the same time, inhibiting the degradation of tight junction (TJ) proteins, protecting the intercellular barrier, and reducing tissue edema and organ damage. However, the mechanism is unclear. Methods Eighty male Sprague-Dawley rats (weighing 280-300 g) with a 50% total body surface area full-thickness dermal burn were randomly assigned to 4 groups (20 rats/group): sham control (SC group), scald + normal saline (SN group), scald + 2-methyl-2pentenoic acid (2M2P group), and scald + valproic acid (VPA group). After scalding, we measured the following parameters at various time intervals postburn injury: intestinal mucosal injury score, diamine oxidase (DAO) activity, intestinal protein expression of acetyl histone H3 at K9 (Ac-H3K9), hypoxia inducible factor 1α (HIF-1α), erythropoietin (EPO), zonula occludens-1 (ZO-1), endothelial nitric oxide synthase (eNOS) content, nitric oxide (NO) content, and intestinal mucosal blood flow (IMBF). Results Intestinal mucosa showed significant morphologic injury at 4 and 8 hours after scalding that was attenuated by VPA. DAO activity in the VPA group was significantly decreased compared with the other scald groups. At 4 and 8 hours after scalding, VPA enhanced Ac-H3K9 and ZO-1 expression and decreased HIF-1α and EPO expression in the intestine compared with the other scald groups. At 4 and 8 hours after scalding, eNOS and NO protein content and IMBF in the VPA group were markedly increased compared with the other scald groups. Conclusions HDACIs attenuated intestinal mucosal injury in fatally scalded rats. This may have involved VPA enhancing Ac-H3K9 and ZO-1 expression, inhibiting HIF-1α and EPO expression and inducing eNOS and NO increments.
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Affiliation(s)
- Rui Liu
- Center for Life Sciences, School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
- Department of Burns, Heilongjiang Provincial Hospital, Harbin, China
| | - Shu-Ming Wang
- Department of Emergency Medicine, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Si-Jia Guo
- Department of Burns, Heilongjiang Provincial Hospital, Harbin, China
| | - Ming-Ming Ma
- Department of Burns, Heilongjiang Provincial Hospital, Harbin, China
| | - Yi-Li Fu
- Center for Life Sciences, School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
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6
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Jiang W, Sun Y, Wang H, Hu Z, Song J, Meng C, Duan S, Jiang Z, Yu Y, Hu D. HIF-1α Enhances Vascular Endothelial Cell Permeability Through Degradation and Translocation of Vascular Endothelial Cadherin and Claudin-5 in Rats With Burn Injury. J Burn Care Res 2021; 42:258-268. [PMID: 32840299 DOI: 10.1093/jbcr/iraa139] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The mechanism underlying burn injury-induced enhanced vascular endothelial permeability and consequent body fluid extravasation is unclear. Here, the rat aortic endothelial cells (RAECs) were treated with the serum derived from rats with burn injury to elucidate the mechanism. Sprague-Dawley (SD) rats were grouped as follows (10 rats/group): control, 2, 4, 8, 12, and 24 hours postburn groups. The heart, liver, kidney, lung, jejunum, and ileum of rats injected with 2% Evans blue (EB) through the tail vein were excised to detect the EB level in each organ. The serum levels of hypoxia-inducible factor-1α (HIF-1α) and endothelin-1 (ET-1) were examined using enzyme-linked immunosorbent assay (ELISA). The effect of serum from 12-hour postburn group on the membrane permeability of RAEC monolayer, as well as on the mRNA and protein levels of ET-1, endothelin receptor A (ETA), ETB, and zonula occludens (ZO-1), was analyzed using quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting. The membrane permeability of GV230/HIF-1α-transfected or shRNA-HIF-1α-transfected RAECs, as well as the expression levels of HIF-1α, ET-1, ETA, ETB, vascular endothelial (VE)-cadherin, and claudin-5, was analyzed using qRT-PCR and western blotting, whereas the localization of VE-cadherin and claudin-5 was examined using immunofluorescence. The serum HIF-1α and ET-1 levels in the burn groups, which peaked at 12 hours postburn, were significantly upregulated (P < .01) when compared with those in the control group. Additionally, the serum HIF-1α levels were positively correlated with vascular permeability. Compared with the shRNA-negative control-transfected RAECs, the shRNA-II/HIF-1α-transfected RAECs exhibited downregulated expression of HIF-1α, ET-1, ETA, and ETB (P < .01), and upregulated expression of ZO-1, claudin-5, and VE-cadherin (P < .05). Compared with the GV230-transfected RAECs, the GV230/HIF-1α-transfected RAECs exhibited upregulated expression of HIF-1α, ET-1, ETA, and ETB (P < .01), and downregulated expression of ZO-1, claudin-5, and VE-cadherin (P < .05). The GV230/HIF-1α-transfected RAECs exhibited degradation and translocation of VE-cadherin and claudin-5. In addition to degradation of VE-cadherin and claudin-5, HIF-1α mediated enhanced endothelial cell permeability through upregulation of ET-1, ETA, and ETB, and downregulation of ZO-1 and VE-cadherin in rats with burn injury.
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Affiliation(s)
- Wei Jiang
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Youjun Sun
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Huan Wang
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Zijian Hu
- 2018 Class of Clinical Medicine (No. 1813010207), The First Clinical College of Anhui Medical University, Hefei, China
| | - Junhui Song
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Chengying Meng
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Shengliang Duan
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Zhiyong Jiang
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Youxin Yu
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Delin Hu
- Department of Burn, The First Affiliated Hospital of Anhui Medical University Department of Burn, The First Affiliated Hospital of Anhui Medical University
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Morris NL, Choudhry MA. Maintenance of gut barrier integrity after injury: Trust your gut microRNAs. J Leukoc Biol 2021; 110:979-986. [PMID: 33577717 DOI: 10.1002/jlb.3ru0120-090rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 12/11/2022] Open
Abstract
The gastrointestinal (GI) tract is a highly dynamic structure essential for digestion, nutrient absorption, and providing an interface to prevent gut bacterial translocation. In order to maintain the barrier function, the gut utilizes many defense mechanisms including proliferation, apoptosis, and apical junctional complexes. Disruption of any of these parameters due to injury or disease could negatively impact the intestinal barrier function and homeostasis resulting in increased intestine inflammation, permeability, bacterial dysbiosis, and tissue damage. MicroRNAs are small noncoding RNA sequences that are master regulators of normal cellular homeostasis. These regulatory molecules affect cellular signaling pathways and potentially serve as candidates for providing a mechanism of impaired gut barrier integrity following GI-related pathologic conditions, ethanol exposure, or trauma such as burn injury. MicroRNAs influence cellular apoptosis, proliferation, apical junction complex expression, inflammation, and the microbiome. Due to their widespread functional affiliations, altered expression of microRNAs are associated with many pathologic conditions. This review explores the role of microRNAs in regulation of intestinal barrier integrity. The studies reviewed demonstrate that microRNAs largely impact intestine barrier function and provide insight behind the observed adverse effects following ethanol and burn injury. Furthermore, these studies suggest that microRNAs are excellent candidates for therapeutic intervention or for biomarkers to manage gut barrier integrity following trauma such as burn injury and other GI-related pathologic conditions.
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Affiliation(s)
- Niya L Morris
- Alcohol Research Program, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Burn & Shock Trauma Research Institute, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Integrative Cell Biology Program, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Current address: Department of Medicine: Pulmonary, Allergy, Critical Care and Sleep, Emory University/Atlanta VA Medical Center, Decatur, Geogia, USA
| | - Mashkoor A Choudhry
- Alcohol Research Program, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Burn & Shock Trauma Research Institute, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Integrative Cell Biology Program, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA.,Department of Surgery, Loyola University Chicago Health Sciences Division, Maywood, Illinois, USA
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Abstract
The leading causes of death in military conflicts continue to be hemorrhagic shock (HS) and traumatic brain injury (TBI). Most of the mortality is a result of patients not surviving long enough to obtain surgical care. As a result, there is a significant unmet need for a therapy that stimulates a "prosurvival phenotype" that counteracts the cellular pathophysiology of HS and TBI to prolong survival. Valproic acid (VPA), a well-established antiepileptic therapy for more than 50 years, has shown potential as one such prosurvival therapy. This review details how VPA's role as a nonselective histone deacetylase inhibitor induces cellular changes that promote survival and decrease cellular pathways that lead to cell death. The review comprehensively covers more than two decades worth of studies ranging from preclinical (mice, swine) to recent human clinical trials of the use of VPA in HS and TBI. Furthermore, it details the different mechanisms in which VPA alters gene expression, induces cytoprotective changes, attenuates platelet dysfunction, provides neuroprotection, and enhances survival in HS and TBI. Valproic acid shows real promise as a therapy that can induce the prosurvival phenotype in those injured during military conflict.
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Adiliaghdam F, Cavallaro P, Mohad V, Almpani M, Kühn F, Gharedaghi MH, Najibi M, Rahme LG, Hodin RA. Targeting the gut to prevent sepsis from a cutaneous burn. JCI Insight 2020; 5:137128. [PMID: 33004693 PMCID: PMC7566703 DOI: 10.1172/jci.insight.137128] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 08/26/2020] [Indexed: 12/13/2022] Open
Abstract
Severe burn injury induces gut barrier dysfunction and subsequently a profound systemic inflammatory response. In the present study, we examined the role of the small intestinal brush border enzyme, intestinal alkaline phosphatase (IAP), in preserving gut barrier function and preventing systemic inflammation after burn wound infection in mice. Mice were subjected to a 30% total body surface area dorsal burn with or without intradermal injection of Pseudomonas aeruginosa. Mice were gavaged with 2000 units of IAP or vehicle at 3 and 12 hours after the insult. We found that both endogenously produced and exogenously supplemented IAP significantly reduced gut barrier damage, decreased bacterial translocation to the systemic organs, attenuated systemic inflammation, and improved survival in this burn wound infection model. IAP attenuated liver inflammation and reduced the proinflammatory characteristics of portal serum. Furthermore, we found that intestinal luminal contents of burn wound-infected mice negatively impacted the intestinal epithelial integrity compared with luminal contents of control mice and that IAP supplementation preserved monolayer integrity. These results indicate that oral IAP therapy may represent an approach to preserving gut barrier function, blocking proinflammatory triggers from entering the portal system, preventing gut-induced systemic inflammation, and improving survival after severe burn injuries.
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Affiliation(s)
- Fatemeh Adiliaghdam
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Paul Cavallaro
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Vidisha Mohad
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Marianna Almpani
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Shriners Hospital for Children, Boston, Massachusetts, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Florian Kühn
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of General, Visceral and Transplant Surgery, Hospital of the University of Munich, Munich, Germany
| | - Mohammad Hadi Gharedaghi
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Mehran Najibi
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Laurence G Rahme
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Shriners Hospital for Children, Boston, Massachusetts, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Richard A Hodin
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
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10
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Morris NL, Cannon AR, Li X, Choudhry MA. Protective effects of PX478 on gut barrier in a mouse model of ethanol and burn injury. J Leukoc Biol 2020; 109:1121-1130. [PMID: 32964503 DOI: 10.1002/jlb.3a0820-323rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 08/17/2020] [Accepted: 08/22/2020] [Indexed: 12/15/2022] Open
Abstract
Ethanol remains a confounder in postburn pathology, which is associated with an impaired intestinal barrier. Previously, we demonstrated that ethanol and burn injury reduce intestinal oxygen delivery (hypoxia) and alters microRNA (miR) expression in small intestinal epithelial cells. Hypoxia has been shown to influence expression of miRs and miR biogenesis components. Therefore, we examined whether hypoxia influences expression of miR biogenesis components (drosha, dicer, and argonaute-2 [ago-2]) and miRs (-7a and -150) and whether these changes impacted other parameters following ethanol and burn injury. Mice were gavaged with ethanol (∼2.9 g/kg) 4 h before receiving a ∼12.5% total body surface full thickness burn. Mice were resuscitated at the time of injury with normal saline with or without 5 mg/kg PX-478, a hypoxia-inducible factor-1α inhibitor. One day following injury mice were euthanized, and the expression of miRs and their biogenesis components as well as bacterial growth, tight junction proteins, intestinal transit, and permeability were assessed. Ethanol combined with burn injury significantly reduced expression of drosha, ago-2, miRs (-7a and -150), occludin, zonula occludens-1, claudin-4, zonula occludens-1, mucins-2 and -4, and intestinal transit compared to shams. Furthermore, there was an increase in intestinal permeability, total bacteria, and Enterobacteriaceae populations following the combined injury compared to shams. PX-478 treatment improved expression of drosha, ago-2, miRs (-7a and -150), occludin, claudin-4, zonula occludens-1, and mucin-2. PX-478 treatment also improved intestinal transit and reduced dysbiosis and permeability. These data suggest that PX-478 improves miR biogenesis and miR expression, and restores barrier integrity while reducing bacterial dysbiosis following ethanol and burn injury.
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Affiliation(s)
- Niya L Morris
- Alcohol Research Program, Department of Surgery, Burn and Shock Trauma Research Institute, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA.,Integrative Cell Biology Program, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA.,Current address: Department of Medicine, Pulmonary, Allergy, Critical Care and Sleep, Emory University/Atlanta VA Medical Center, Decatur, Georgia, USA
| | - Abigail R Cannon
- Alcohol Research Program, Department of Surgery, Burn and Shock Trauma Research Institute, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA
| | - Xiaoling Li
- Alcohol Research Program, Department of Surgery, Burn and Shock Trauma Research Institute, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA
| | - Mashkoor A Choudhry
- Alcohol Research Program, Department of Surgery, Burn and Shock Trauma Research Institute, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA.,Department of Microbiology and Immunology, Loyola University Chicago Health Sciences Campus, Maywood, Illinois, USA
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11
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Abstract
Trauma remains a leading cause of morbidity and mortality among all age groups in the United States. Hemorrhagic shock and traumatic brain injury (TBI) are major causes of preventable death in trauma. Initial treatment involves fluid resuscitation to improve the intravascular volume. Although crystalloids may provide volume expansion, they do not have any pro-survival properties. Furthermore, aggressive fluid resuscitation can provoke a severe inflammatory response and worsen clinical outcomes. Due to logistical constraints, however, definitive resuscitation with blood products is often not feasible in the prehospital setting-highlighting the importance of adjunctive therapies. In recent years, histone deacetylase inhibitors (HDACis) have shown promise as pharmacologic agents for use in both trauma and sepsis. In this review, we discuss the role of histone deacetylases (HDACs) and pharmacologic agents that inhibit them (HDACis). We also highlight the therapeutic effects and mechanisms of action of HDACis in hemorrhagic shock, TBI, polytrauma, and sepsis. With further investigation and translation, HDACis have the potential to be a high-impact adjunctive therapy to traditional resuscitation.
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Remote Burn Injury Increases Pulmonary Histone Deacetylase 1 and Reduces Histone Acetylation. J Burn Care Res 2018; 37:321-7. [PMID: 26629657 DOI: 10.1097/bcr.0000000000000318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Dermal burn injury causes profound physiological derangements. Respiratory failure is a primary cause of morbidity and mortality after burn injury, in part, because of excessive and prolonged release of local and systemic proinflammatory mediators. Clinical and preclinical evidence suggests histone deacetylases (HDACs) are key mediators of inflammatory responses. The study objective was to explore the effects of dermal burn injury on pulmonary HDAC activity, identify specific lung HDAC(s) altered by burn, and characterize histone lysine acetylation status. Mice were subjected to a 15% total body surface area scald burn or a sham injury and euthanized 24 hours later. Whole lungs were harvested, or alveolar macrophages were isolated from bronchoalveolar lavage fluid. HDAC specific activity assays were performed, Western blots were run to analyze HDACs1, 2, 3, 4, and 10 or histone lysine acetylation levels, and HDAC1 and phosphorylated-HDAC1 levels and localization were examined by immunofluorescence. Burned mice had higher HDAC specific activity and increased HDAC1 levels compared with controls, but levels of other HDACs were comparable between groups. Burn injury increased levels of HDAC1 and phosphorylated-HDAC1 in bronchioles and alveolar sacs and was associated with global and specific diminished levels of histone H3 and histone H4 lysine acetylation. Our analyses reveal that pulmonary inflammation after burn injury may be modulated by epigenetic mechanisms involving HDACs because HDAC activity, HDAC1 expression and activity, and downstream histone acetylation were all altered after burn. Future studies will explore the role of HDAC inhibitors in reversing inflammatory defects and may ultimately lead to new treatment interventions for burn patients.
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Abstract
The widespread and rapidly increasing trend of binge drinking is accompanied by a concomitant rise in the prevalence of trauma patients under the influence of alcohol at the time of their injury. Epidemiological evidence suggests up to half of all adult burn patients are intoxicated at the time of admission, and the presence of alcohol is an independent risk factor for death in the early stages post burn. As the major site of alcohol metabolism and toxicity, the liver is a critical determinant of postburn outcome, and experimental evidence implies an injury threshold exists beyond which burn-induced hepatic derangement is observed. Alcohol may lower this threshold for postburn hepatic damage through a variety of mechanisms including modulation of extrahepatic events, alteration of the gut-liver axis, and changes in signaling pathways. The direct and indirect effects of alcohol may prime the liver for the second-hit of many overlapping physiologic responses to burn injury. In an effort to gain a deeper understanding of how alcohol potentiates postburn hepatic damage, the authors summarize possible mechanisms by which alcohol modulates the postburn hepatic response.
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Bogdanovski DA, DiFazio LT, Bogdanovski AK, Csóka B, Jordan GB, Paul ER, Antonioli L, Pilip SA, Nemeth ZH. Hypoxia-inducible-factor-1 in trauma and critical care. J Crit Care 2017; 42:207-212. [PMID: 28779702 DOI: 10.1016/j.jcrc.2017.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 06/19/2017] [Accepted: 07/11/2017] [Indexed: 12/27/2022]
Abstract
HIF-1 is a ubiquitous signaling molecule constantly expressed by the body, but is degraded during normoxic conditions. In hypoxic conditions, it persists and is active. Hypoxia is often associated with trauma due to interrupted blood flow, inflammation or other reasons, causing HIF-1 to be active in signaling and recovery. In this review, the function of HIF-1 is examined, as well as its clinical significance with regard to trauma and critical care. Using this information, we then identify potential points of treatment and intervention.
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Affiliation(s)
| | | | | | - Balázs Csóka
- Dept. of Surgery, Rutgers-New Jersey Medical School, United States.
| | | | - Elina R Paul
- Dept. of Surgery, Morristown Medical Center, United States.
| | - Luca Antonioli
- Dept. of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy.
| | | | - Zoltan H Nemeth
- Dept. of Surgery, Morristown Medical Center, United States; Dept. of Surgery, Rutgers-New Jersey Medical School, United States.
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Matheus VA, Monteiro L, Oliveira RB, Maschio DA, Collares-Buzato CB. Butyrate reduces high-fat diet-induced metabolic alterations, hepatic steatosis and pancreatic beta cell and intestinal barrier dysfunctions in prediabetic mice. Exp Biol Med (Maywood) 2017; 242:1214-1226. [PMID: 28504618 DOI: 10.1177/1535370217708188] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In this study, we investigated the effect of diet supplementation with sodium butyrate (5% w/w), a short-chain fatty acid produced by the intestinal microbiota, on metabolic parameters, body adiposity, hepatic and pancreatic lipid accumulation, beta cell function/mass as well as on the structure and function of the tight junction-mediated intestinal epithelial barrier in both normal and obese/prediabetic C57 mice fed a regular (control) or high-fat diet for 60 days, respectively. Butyrate treatment significantly inhibited all the high-fat-induced metabolic dysfunctions evaluated, i.e. significantly reduced the weight gain and body adiposity as well as the insulin resistant state, hyperglycemia and hyperinsulinemia, without changing food intake. In addition, high-fat-fed mice treated with this short-chain fatty acid displayed no compensatory hyperplasia of pancreatic beta cells nor marked hepatic steatosis as seen in prediabetic mice after high-fat diet only. Isolated pancreatic islets from high-fat-fed mice treated with butyrate showed improvement of the insulin secretion, which was associated with a significant decrease in lipid accumulation within the pancreas. Butyrate enhanced the intestinal epithelial barrier, as revealed by the FITC-Dextran permeability assay, which was accompanied by a significant increase in the junctional content of the tight junction-associated claudin-1 in intestinal epithelia of jejunum, ileum, and colon of both control and high-fat mice. In conclusion, our results showed that diet supplementation with butyrate inhibits the deleterious effects of high-fat diet intake on metabolic parameters and structure/function of several tissues/organs associated with type 2 diabetes mellitus in a mouse model, suggesting a potential use of this short-chain fatty acid in the treatment of this endocrine-metabolic disorder. Impact statement Butyrate is a short-chain fatty acid produced by the intestinal microbiota through the fermentation of non-absorbable carbohydrates and proteins (e.g. fibers). Sodium butyrate incorporated into the diet displayed a protective action on metabolic, hepatic, pancreatic and intestinal alterations induced by high-fat diet in mice, resulting in significant inhibition of the development of a prediabetic state. Thus, our data suggest that butyrate may have a potential therapeutic use in the treatment of type 2 diabetes and related disorders.
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Affiliation(s)
- V A Matheus
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-970, Brazil
| | - Lcs Monteiro
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-970, Brazil
| | - R B Oliveira
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-970, Brazil
| | - D A Maschio
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-970, Brazil
| | - C B Collares-Buzato
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-970, Brazil
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Halaweish I, Nikolian V, Georgoff P, Li Y, Alam HB. Creating a "Prosurvival Phenotype" Through Histone Deacetylase Inhibition: Past, Present, and Future. Shock 2016; 44 Suppl 1:6-16. [PMID: 25565645 DOI: 10.1097/shk.0000000000000319] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Traumatic injuries and their sequelae represent a major source of mortality in the United States and globally. Initial treatment for shock, traumatic brain injury, and polytrauma is limited to resuscitation fluids to replace lost volume. To date, there are no treatments with inherent prosurvival properties. Our laboratory has investigated the use of histone deacetylase inhibitors (HDACIs) as pharmacological agents to improve survival. This class of drugs acts through posttranslational protein modifications and is a direct regulator of chromatin structure and function, as well as the function of numerous cytoplasmic proteins. In models of hemorrhagic shock and polytrauma, administration of HDACIs offers a significant survival advantage, even in the absence of fluid resuscitation. Positive results have also been shown in two-hit models of hemorrhage and sepsis and in hemorrhagic shock combined with traumatic brain injury. Accumulating data generated by our group and others continue to support the use of HDACIs for the creation of a prosurvival phenotype. With further research and clinical trials, HDACIs have the potential to be an integral tool in the treatment of trauma, especially in the prehospital phase.
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Affiliation(s)
- Ihab Halaweish
- Department of Surgery, University of Michigan, Ann Arbor, Michigan
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Zhao Y, You W, Zheng J, Chi Y, Tang W, Du R. Valproic acid inhibits the angiogenic potential of cervical cancer cells via HIF-1α/VEGF signals. Clin Transl Oncol 2016; 18:1123-1130. [DOI: 10.1007/s12094-016-1494-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Accepted: 02/20/2016] [Indexed: 01/14/2023]
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Zhang K, Jiao XF, Li JX, Wang XW. Rhein inhibits lipopolysaccharide-induced intestinal injury during sepsis by blocking the toll-like receptor 4 nuclear factor-κB pathway. Mol Med Rep 2015; 12:4415-4421. [PMID: 26081522 DOI: 10.3892/mmr.2015.3925] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 04/30/2015] [Indexed: 11/05/2022] Open
Abstract
Sepsis is one of the leading causes of mortality in severe systemic inflammatory syndrome. The endotoxin-induced inflammatory response has been linked to the development of sepsis. Rhein is a lipophilic anthraquinone isolated from Rheum rhabarbarum (rhubarb), which has a protective effect on intestinal damage in vivo. However, the underlying mechanism responsible for the protective effects of rhein remains to be elucidated. In the present study, mice were exposed to 20 mg/kg lipopolysaccharide (LPS), prior to being treated with either 100 mg/kg rhein or 0.3 mg/kg toll‑like receptor 4 (TLR4) signaling inhibitor TAK‑242. In the rhein‑treated mice, the colon length (cm) was extended and colon injury was attenuated. In addition, treatment with rhein significantly decreased the expression levels of the LPS‑induced inflammatory cytokines interleukin (IL)‑1β, IL‑6, IL‑8, and tumor necrosis factor‑α, in both the plasma and colon tissue. However, mice treated with TAK‑242 exhibited increased expression levels of IL‑10, as determined by ELISA and western blot analysis. In addition, immunohistochemistry and western blot analyses demonstrated that treatment with rhein was able to reduce TLR4 expression and inhibit nuclear factor‑κB (NF‑κB) phosphorylation in colon tissue. Furthermore, LPS induction was blocked by TAK‑242. These results demonstrate that the observed rhein‑attenuated inflammatory response during sepsis may be achieved via the TLR4 NF‑κB signaling pathway. In conclusion, the results of the present study provide a novel insight into the protective effects of rhein on LPS‑induced intestinal inflammation, and demonstrate that rhein may act as a beneficial therapeutic agent in the treatment of sepsis-induced intestinal damage.
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Affiliation(s)
- Ke Zhang
- Department of Critical Care Medicine, Zhengzhou People's Hospital, Zhengzhou, Henan 450053, P.R. China
| | - Xian Fa Jiao
- Department of Critical Care Medicine, Zhengzhou People's Hospital, Zhengzhou, Henan 450053, P.R. China
| | - Jin Xiu Li
- Department of Critical Care Medicine, Zhengzhou People's Hospital, Zhengzhou, Henan 450053, P.R. China
| | - Xiao Wen Wang
- Department of Critical Care Medicine, Zhengzhou People's Hospital, Zhengzhou, Henan 450053, P.R. China
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Hu D, Yu Y, Wang C, Li D, Tai Y, Fang L. microRNA-98 mediated microvascular hyperpermeability during burn shock phase via inhibiting FIH-1. Eur J Med Res 2015; 20:51. [PMID: 25903459 PMCID: PMC4411771 DOI: 10.1186/s40001-015-0141-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 04/13/2015] [Indexed: 12/19/2022] Open
Abstract
Background microRNA is a small non-coding RNA molecule and functions in RNA silencing and post-transcriptional regulation of gene expression. This study was designed to evaluate the role of miR-98 in the development of microvascular permeability and its molecular pathogenesis. Methods Forty-eight healthy adult Wistar rats were divided into the control group (n = 8) and burn group (n = 40) that inflicted with 30% total body surface area third-degree burn. Groups were processed at 2, 4, 8, 12, and 24 h post-burn. Plasma for vascular endothelial cell culture was collected from control and 12 h post-burn rats. Organic microvascular permeability and serum miR-98 level were measured. In vitro, rat aorta endothelial cells were stimulated with burn serum. Level of miR-98 and protein of hypoxia-inducible factor-1 (HIF-1), factor inhibiting HIF-1α (FIH-1), and tight junction-associated proteins were determined. Results Organic microvascular permeability began to rise at 2 h post-burn and maintained the same character throughout the experiment except in lung tissue that was still rising at 12 h; the serum level of miR-98 was elevated (P < 0.05). In vitro, burn serum stimulation increased rat aorta endothelial monolayer cell permeability as well as upregulated miR-98 expression (P < 0.05). As shown in the result of transfection experiment, miR-98 negatively regulated FIH-1 and tight junction-associated protein expression (P < 0.05). Conclusions The findings of the present study suggest severe microvascular permeability due to burns; and the underlying mechanism bases on the promotion of miR-98 level to the extent that it activated HIF-1 gene expression, resulting in junction-associated protein deficiency.
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Affiliation(s)
- Delin Hu
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
| | - Youxin Yu
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
| | - Chunhua Wang
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
| | - Denghui Li
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
| | - Yuncheng Tai
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
| | - Linsen Fang
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, Anhui Province, 230022, People's Republic of China.
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