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Burtscher J, Millet GP, Fresa M, Lanzi S, Mazzolai L, Pellegrin M. The link between impaired oxygen supply and cognitive decline in peripheral artery disease. Prog Cardiovasc Dis 2024; 85:63-73. [PMID: 38061613 DOI: 10.1016/j.pcad.2023.12.002] [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: 12/04/2023] [Accepted: 12/04/2023] [Indexed: 12/26/2023]
Abstract
Although peripheral artery disease (PAD) primarily affects large arteries outside the brain, PAD is also associated with elevated cerebral vulnerabilities, including greater risks for brain injury (such as stroke), cognitive decline and dementia. In the present review, we aim to evaluate recent literature and extract information on potential mechanisms linking PAD and consequences on the brain. Furthermore, we suggest novel therapeutic avenues to mitigate cognitive decline and reduce risk of brain injury in patients with PAD. Various interventions, notably exercise, directly or indirectly improve systemic blood flow and oxygen supply and are effective strategies in patients with PAD or cognitive decline. Moreover, triggering protective cellular and systemic mechanisms by modulating inspired oxygen concentrations are emerging as potential novel treatment strategies. While several genetic and pharmacological approaches to modulate adaptations to hypoxia showed promising results in preclinical models of PAD, no clear benefits have yet been clinically demonstrated. We argue that genetic/pharmacological regulation of the involved adaptive systems remains challenging but that therapeutic variation of inspired oxygen levels (e.g., hypoxia conditioning) are promising future interventions to mitigate associated cognitive decline in patients with PAD.
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Affiliation(s)
- Johannes Burtscher
- Institute of Sport Sciences, University of Lausanne, 1015 Lausanne, Switzerland; Department of Biomedical Sciences, University of Lausanne, 1005 Lausanne, Switzerland.
| | - Grégoire P Millet
- Institute of Sport Sciences, University of Lausanne, 1015 Lausanne, Switzerland; Department of Biomedical Sciences, University of Lausanne, 1005 Lausanne, Switzerland
| | - Marco Fresa
- Angiology Department, Lausanne University Hospital, University of Lausanne, 1011 Lausanne, Switzerland
| | - Stefano Lanzi
- Angiology Department, Lausanne University Hospital, University of Lausanne, 1011 Lausanne, Switzerland
| | - Lucia Mazzolai
- Angiology Department, Lausanne University Hospital, University of Lausanne, 1011 Lausanne, Switzerland
| | - Maxime Pellegrin
- Institute of Sport Sciences, University of Lausanne, 1015 Lausanne, Switzerland; Angiology Department, Lausanne University Hospital, University of Lausanne, 1011 Lausanne, Switzerland.
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Vinkel J, Arenkiel B, Hyldegaard O. The Mechanisms of Action of Hyperbaric Oxygen in Restoring Host Homeostasis during Sepsis. Biomolecules 2023; 13:1228. [PMID: 37627293 PMCID: PMC10452474 DOI: 10.3390/biom13081228] [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: 07/19/2023] [Revised: 08/02/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023] Open
Abstract
The perception of sepsis has shifted over time; however, it remains a leading cause of death worldwide. Sepsis is now recognized as an imbalance in host cellular functions triggered by the invading pathogens, both related to immune cells, endothelial function, glucose and oxygen metabolism, tissue repair and restoration. Many of these key mechanisms in sepsis are also targets of hyperbaric oxygen (HBO2) treatment. HBO2 treatment has been shown to improve survival in clinical studies on patients with necrotizing soft tissue infections as well as experimental sepsis models. High tissue oxygen tension during HBO2 treatment may affect oxidative phosphorylation in mitochondria. Oxygen is converted to energy, and, as a natural byproduct, reactive oxygen species are produced. Reactive oxygen species can act as mediators, and both these and the HBO2-mediated increase in oxygen supply have the potential to influence the cellular processes involved in sepsis. The pathophysiology of sepsis can be explained comprehensively through resistance and tolerance to infection. We argue that HBO2 treatment may protect the host from collateral tissue damage during resistance by reducing neutrophil extracellular traps, inhibiting neutrophil adhesion to vascular endothelium, reducing proinflammatory cytokines, and halting the Warburg effect, while also assisting the host in tolerance to infection by reducing iron-mediated injury and upregulating anti-inflammatory measures. Finally, we show how inflammation and oxygen-sensing pathways are connected on the cellular level in a self-reinforcing and detrimental manner in inflammatory conditions, and with support from a substantial body of studies from the literature, we conclude by demonstrating that HBO2 treatment can intervene to maintain homeostasis.
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Affiliation(s)
- Julie Vinkel
- Department of Anesthesiology, Centre of Head and Orthopedics, Rigshospitalet, University of Copenhagen, 2100 Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Bjoern Arenkiel
- Department of Anesthesiology, Centre of Head and Orthopedics, Rigshospitalet, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Ole Hyldegaard
- Department of Anesthesiology, Centre of Head and Orthopedics, Rigshospitalet, University of Copenhagen, 2100 Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2200 Copenhagen, Denmark
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Kaur H, Kochhar GS, Dulai PS. Role of hyperbaric oxygen therapy in patients with inflammatory bowel disease. Curr Opin Gastroenterol 2023; 39:263-267. [PMID: 37265170 PMCID: PMC10287057 DOI: 10.1097/mog.0000000000000952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE OF REVIEW Hypoxia is a known contributor to inflammation in inflammatory bowel diseases (IBD), and a growing interest has emerged in pharmacologically targeting hypoxia response pathways to treat IBD. The most basic form of treatment for hypoxia is delivering higher amounts of oxygen to the intestinal mucosa. In this review, we summarize the evidence in support of hyperbaric oxygen therapy (HBOT), a mechanism to deliver high amounts of oxygen to tissue, for treating IBD. RECENT FINDINGS Two phase 2 clinical trials in hospitalized ulcerative colitis patients suffering from moderate-to-severe flares have demonstrated that HBOT improves responsiveness to steroids and avoidance of rescue medical and surgical therapy. Outpatient cohort studies in perianal fistulizing Crohn's disease and fistulizing complications of the pouch have demonstrated improved healing, particularly for complex fistulae. Several systematic reviews have now been completed, and HBOT has been observed to be well tolerated with low rates of adverse events. SUMMARY HBOT may be considered as an adjunctive treatment for hospitalized ulcerative colitis flares and Crohn's disease-related fistulae. Higher quality trials are needed to confirm efficacy.
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Affiliation(s)
- Harpreet Kaur
- Department of Internal Medicine, BronxCare Health System, Bronx, New York
| | - Gursimran Singh Kochhar
- Division of Gastroenterology, Hepatology & Nutrition, Allegheny Health Network, Pittsburgh, Pennsylvania
| | - Parambir S Dulai
- Division of Gastroenterology and Hepatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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Wu X, You J, Chen X, Zhou M, Ma H, Zhang T, Huang C. An overview of hyperbaric oxygen preconditioning against ischemic stroke. Metab Brain Dis 2023; 38:855-872. [PMID: 36729260 PMCID: PMC10106353 DOI: 10.1007/s11011-023-01165-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/23/2022] [Accepted: 01/12/2023] [Indexed: 02/03/2023]
Abstract
Ischemic stroke (IS) has become the second leading cause of morbidity and mortality worldwide, and the prevention of IS should be given high priority. Recent studies have indicated that hyperbaric oxygen preconditioning (HBO-PC) may be a protective nonpharmacological method, but its underlying mechanisms remain poorly defined. This study comprehensively reviewed the pathophysiology of IS and revealed the underlying mechanism of HBO-PC in protection against IS. The preventive effects of HBO-PC against IS may include inducing antioxidant, anti-inflammation, and anti-apoptosis capacity; activating autophagy and immune responses; upregulating heat shock proteins, hypoxia-inducible factor-1, and erythropoietin; and exerting protective effects upon the blood-brain barrier. In addition, HBO-PC may be considered a safe and effective method to prevent IS in combination with stem cell therapy. Although the benefits of HBO-PC on IS have been widely observed in recent research, the implementation of this technique is still controversial due to regimen differences. Transferring the results to clinical application needs to be taken carefully, and screening for the optimal regimen would be a daunting task. In addition, whether we should prescribe an individualized preconditioning regimen to each stroke patient needs further exploration.
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Affiliation(s)
- Xuyi Wu
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Jiuhong You
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- School of Rehabilitation Sciences, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Xinxin Chen
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- School of Rehabilitation Sciences, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Mei Zhou
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- School of Rehabilitation Sciences, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Hui Ma
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- School of Rehabilitation Sciences, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Tianle Zhang
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Cheng Huang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
- Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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Oliaei S, Karimi A, Shamsabadi A, Mirzapour P, Mojdeganlou H, Nazeri Z, Bagheri AB, Nazarian N, Jashaninejad R, Qodrati M, Amiri Fard I, Ghanadinezhad F, Afzalian A, Heydari M, Mehraeen E, SeyedAlinaghi S. Design, development, and evaluation of a registry system for hyperbaric oxygen therapy: A methodological study. Health Sci Rep 2022; 5:e768. [PMID: 35949684 PMCID: PMC9358536 DOI: 10.1002/hsr2.768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 05/19/2022] [Accepted: 06/19/2022] [Indexed: 11/06/2022] Open
Abstract
Background and Aims Hyperbaric oxygen therapy (HBOT), utilizes 100% oxygen at pressures greater than sea-level atmospheric pressure, for the treatment of conditions in which the tissues starve for oxygen. The Undersea and Hyperbaric Medical Society (UHMS) has granted HBOT approval for the treatment of various conditions. On the other hand, applying informatics registry systems can improve care delivery, ameliorate outcomes, and reduce the costs and medical errors for the patients receiving HBOT treatment. Therefore, we aimed to design, develop, and evaluate a registry system for patients undergoing HBOT. Methods In the first phase, the conceptual and logical models were designed after conducting symposiums with experts and having other experts review the models. In the second phase, the system was developed on the web using ASP.NET and C# programming languages frameworks. The last phase involved Nielsen's heuristic evaluation method for the system's usability. Five experts evaluated the system, including three health information management specialists and two medical informatics specialists. Results The hyperbaric patient information registry system (HPIRS) interacts with three types of users-a specialist physician, a nurse, and a system administrator. A scenario for each predefined activity was designed, and all the information was stored in the SQL servers. The five experts independently found 152 issues, of which 84 were duplicates. The 68 distinct issues of the system were then resolved. Conclusions The design and development of such registry systems can make data available and stored carefully to improve clinical care and medical research and decrease costs and errors. These registries can provide the healthcare systems with E-health applications, improved data management, more secure data transfer, and support for statistical reporting. The implemented heuristic evaluation method can also provide a low-cost and readily available system to fix the issues of the designed systems.
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Affiliation(s)
- Shahram Oliaei
- HBOT Research Center, Golestan Hospital, Islamic Republic of IranNavy and AJA Medical UniversityTehranIran
| | - Amirali Karimi
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Ahmadreza Shamsabadi
- Department of Health Information TechnologyEsfarayen Faculty of Medical SciencesEsfarayenIran
| | - Pegah Mirzapour
- Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High Risk BehaviorsTehran University of Medical SciencesTehranIran
| | | | - Zahra Nazeri
- Department of Health Information ManagementTehran University of Medical SciencesTehranIran
| | - Amir B. Bagheri
- Michael E. DeBakey Department of Surgery, Division of Vascular Surgery and Endovascular Therapy, Interdisciplinary Consortium on Advanced Motion PerformanceBaylor College of MedicineHoustonTexasUSA
- Faculty of MedicineMashhad University of Medical SciencesMashhadIran
| | | | - Reyhaneh Jashaninejad
- Department of Epidemiology, School of Public HealthHamadan University of Medical SciencesHamadanIran
| | - Mohammad Qodrati
- Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High Risk BehaviorsTehran University of Medical SciencesTehranIran
| | - Iman Amiri Fard
- Department of Community Health Nursing and Geriatric Nursing, School of Nursing and MidwiferyIran University of Medical SciencesTehranIran
| | | | - Arian Afzalian
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Mohammad Heydari
- Department of Health Information TechnologyKhalkhal University of Medical SciencesKhalkhalIran
| | - Esmaeil Mehraeen
- Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High Risk BehaviorsTehran University of Medical SciencesTehranIran
- Department of Health Information TechnologyKhalkhal University of Medical SciencesKhalkhalIran
| | - SeyedAhmad SeyedAlinaghi
- Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High Risk BehaviorsTehran University of Medical SciencesTehranIran
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Nasiry D, Khalatbary AR, Abdollahifar MA, Bayat M, Amini A, Kazemi Ashtiani M, Rajabi S, Noori A, Piryaei A. SDF-1α loaded bioengineered human amniotic membrane-derived scaffold transplantation in combination with hyperbaric oxygen improved diabetic wound healing. J Biosci Bioeng 2022; 133:489-501. [PMID: 35248486 DOI: 10.1016/j.jbiosc.2022.01.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 01/06/2022] [Accepted: 01/26/2022] [Indexed: 12/13/2022]
Abstract
Based on its multifactorial nature, successful treatment of diabetic wounds requires combinatorial approach. In this regard, we hypothesized that engraftment of a bioengineered micro-porous three-dimensional human amniotic membrane-scaffold (HAMS) loaded by SDF-1α (SHAMS) in combination with hyperbaric oxygen (HBO), throughout mobilization and recruitment of endothelial progenitor cells (EPCs), could accelerate wound healing in rats with type 1 diabetes mellitus. To test this hypothesis, 30 days after inducting diabetes, an ischemic wound was created in rat skin and treatments were performed for 21 days. In addition to wounded non-diabetic (ND) group, diabetic animals were randomly divided into non-treated (NT-D), HBO-treated (HBO-D), HBO-treated plus HAMS transplantation (HBO+HAMS-D) or HBO-treated in combination with SHAMS transplantation (HBO+SHAMS-D) groups. Our results on post-wounding days 7, 14 and 21 showed that the wound closure, volume of new dermis and epidermis, numerical density of basal cells of epidermis, fibroblasts and blood vessels, number of proliferating cells, deposition of collagen and biomechanical properties of healed wound were considerably higher in both HBO+HAMS-D and HBO+SHAMS-D groups in comparison to those of the NT-D and HBO-D groups, and were the highest in HBO+SHAMS-D ones. The transcripts for Vegf, bFgf, and Tgf-β genes were significantly upregulated in all treatment regimens compared to NT-D group and were the highest for HBO+SHAMS-D group. This is while expression of Tnf-α and Il-1β as well as cell density of neutrophil and macrophage decreased more significantly in HBO+SHAMS-D group as compared with NT-D or HBO-D groups. Overall, it was found that using both HAMS transplantation and HBO treatment has more impact on diabetic wound healing. Moreover, SDF-1α loading on HAMS could transiently improve the wound healing process, as compared with the HBO+HAMS-D group on day 7 only.
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Affiliation(s)
- Davood Nasiry
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Ali Reza Khalatbary
- Molecular and Cell Biology Research Center, Department of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari 4815733971, Iran
| | - Mohammad-Amin Abdollahifar
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Mohammad Bayat
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Abdollah Amini
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Mohammad Kazemi Ashtiani
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran
| | - Sarah Rajabi
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran
| | - Afshin Noori
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran
| | - Abbas Piryaei
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran; Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran.
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Luo L, Qing L, Yao C, Liu D, Li Y, Li T, Feng P. Efficacy and safety of hyperbaric oxygen therapy for moderate-to-severe ulcerative colitis: a protocol for a systematic review and meta-analysis. BMJ Open 2021; 11:e047543. [PMID: 34183344 PMCID: PMC8240565 DOI: 10.1136/bmjopen-2020-047543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 05/27/2021] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Ulcerative colitis (UC) is a type of inflammatory bowel disease, and 62% of patients with UC felt that it is difficult for them to live a normal life. Furthermore, some researches have shown that about 15% of patients with UC undergo at least one extreme clinical course in their lifetime, and 10%-30% of patients with UC oblige colectomy. Although many investigations have demonstrated that HBO2 has a beneficial impact on UC treatment, a systematic review and meta-analysis are unavailable. Therefore, a meta-analysis is essential to assess the efficacy and safety of HBO2 in treating UC. METHODS AND ANALYSIS A systematic search plan will be performed in the following seven databases with a restriction of time from inception to September 2020 to filter the eligible studies: PubMed, Web of Science, Embase, Cochrane Library, China National Knowledge Infrastructure, Chinese Scientific Journal Database (VIP) and Chinese Biomedical Database WanFang. Other related resources will be also searched. Two independent reviewers will choose eligible researches and extract data. The risk of bias will be evaluated based on Cochrane Collaboration's Risk of Bias tool and Newcastle-Ottawa Scale. Eventually, a systematic review and meta-analysis will be performed via the Review Manager V.5.3 statistical software and STATA V.14.0 software. ETHICS AND DISSEMINATION This study will not involve the individual patient and any ethical problems since its outcomes are based on published data. Therefore, no ethical review and approval are required. We plan to publish the study in a peer-reviewed journal. PROSPERO REGISTRATION NUMBER CRD42020210244.
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Affiliation(s)
- Lihong Luo
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Lei Qing
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Chengjiao Yao
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Dongying Liu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Yilin Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Tinglin Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
| | - Peimin Feng
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China
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Hasan B, Yim Y, Ur Rashid M, Khalid RA, Sarvepalli D, Castaneda D, Ur Rahman A, Palekar N, Charles R, Castro FJ, Shen B. Hyperbaric Oxygen Therapy in Chronic Inflammatory Conditions of the Pouch. Inflamm Bowel Dis 2021; 27:965-970. [PMID: 32944766 DOI: 10.1093/ibd/izaa245] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Pouchitis can be a chronic complication of ileal pouch-anal anastomosis. We aimed to determine the efficacy and safety of hyperbaric oxygen therapy (HBOT) for chronic antibiotic-refractory pouchitis (CARP) and other inflammatory conditions of the pouch. METHODS This was a retrospective case series of adults with inflammatory bowel disease (IBD) who underwent ileal pouch-anal anastomosis and then developed CARP and received HBOT between January 2015 and October 2019. A modified Pouchitis Disease Activity Index (mPDAI) score was used to quantify subjective symptoms (0-6) and endoscopic findings (0-6) before and after HBOT. RESULTS A total of 46 patients were included, with 23 (50.0%) being males with a mean age of 43.6 ± 12.9 years. The median number of HBOT sessions was 30 (range 10-60). There was a significant reduction in the mean mPDAI symptom subscore from 3.19 to 1.91 after HBOT (P < 0.05). The pre- and post-HBOT mean mPDAI endoscopy subscores for the afferent limb were 2.31 ± 1.84 and 0.85 ± 1.28 (P = 0.006); for the pouch body, 2.34 ± 1.37 and 1.29 ± 1.38 (P < 0.001); and for the cuff, 1.93 ± 1.11 and 0.63 ± 1.12 (P < 0.001), respectively. Transient side effects included ear barotrauma in 5 patients (10.9%) and hyperbaric myopic vision changes in 5 patients (10.9%). CONCLUSIONS Despite minor adverse events, HBOT was well tolerated in patients with CARP and significantly improved symptoms and endoscopic parameters.
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Affiliation(s)
- Badar Hasan
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Yunjoo Yim
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | | | - Rumman A Khalid
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | | | - Daniel Castaneda
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Asad Ur Rahman
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Nicole Palekar
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Roger Charles
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Fernando J Castro
- Department of Gastroenterology, Cleveland Clinic Florida, Weston, FL, USA
| | - Bo Shen
- Inflammatory Bowel Disease Center, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
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Silva FS, Canêdo VSR, Abreu BJ, Oliveira MF. Responses of matrix metalloproteinases to hyperbaric oxygen treatment: changing for good or ill? Connect Tissue Res 2021; 62:249-262. [PMID: 32900238 DOI: 10.1080/03008207.2020.1821675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Background: Hyperbaric oxygen (HBO2) is currently emerging as a promising therapeutic option for diseases involving impaired tissue repair and remodeling. In this regard, HBO2 has been shown to modulate signaling pathways responsible for matrix metalloproteinases (MMPs) regulation, which makes the MMPs interesting targets for investigation. However, the understanding regarding how HBO2 treatment affects the expression and activity of the MMP family members in different tissues and diseases needs to be clarified. The precise roles of MMPs in the physiopathology of various tissue repair disorders also remain unclear. Because of potential off-target systemic effects of the HBO2 on MMPs, researchers and physicians should carefully consider whether their patients could be affected adversely by HBO2 exposure. Aims: This narrative review provides an overview of MMP biology (structure, function, and regulation) and summarizes available data showing how MMPs respond to HBO2 in different tissues and pathologies, also highlighting possible mechanisms.
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Affiliation(s)
- Flávio S Silva
- Department of Health Sciences, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
| | - Vítor S R Canêdo
- Department of Health Sciences, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
| | - Bento J Abreu
- Department of Morphology, Federal University of Rio Grande Do Norte (UFRN), Natal, Brazil
| | - Moacir F Oliveira
- Department of Animal Sciences, Federal Rural University of the Semi-Arid (UFERSA), Mossoró, Brazil
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Pathophysiological Responses to a Record-Breaking Multi-hour Underwater Endurance Performance: A Case Study. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1289:79-88. [PMID: 32488605 DOI: 10.1007/5584_2020_546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The "Endless Diving Project-Step 36" took place in the harbor waters of the town of Maratea in Italy in September 2014. The goal of the project was an attempt by an experienced male diver, equipped with a wet 7-mm suit and a normal gas tank, to set the world record-breaking of nonstop underwater performance. We studied inflammatory, hematological, and endocrine responses during the extreme condition of the attempt. Venous blood samples were collected at baseline, the day before the attempt; immediately after the return from underwater; then at Day 1, Day 4, and Day 12; and later at Month 1 and Month 41 of follow-up. We found that there was an increase in the content of blood neutrophils, monocytes, and eosinophils and a decrease in lymphocytes at Day 1 and a late increase in basophils at Day 12 after the dive. Inflammatory markers and hematocrit and hemoglobin increased immediately after the dive, dropped at Day 1, and reverted gradually to the control level from Day 4 to Day 12. Serotonin and dopamine decreased, while adrenaline increased at Day 1, gradually recovering in the days of follow-up. Insulin, luteinizing hormone, growth hormone, and prolactin increased, while testosterone, cortisol, 17β-estradiol, thyroid-stimulating hormone, and adrenocorticotropic hormone decreased at Day 1, with a partial recovery at Day 4. We conclude that the homeostatic response to the extreme, prolonged underwater performance showed signs of psychological and pro-inflammatory stress. The hormonal response reflected an acute testicular insufficiency. These responses resembled those characteristics for ultra-endurance exercise accompanied by vasculitis and dehydration.
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Hao Y, Xin M, Feng L, Wang X, Wang X, Ma D, Feng J. Review Cerebral Ischemic Tolerance and Preconditioning: Methods, Mechanisms, Clinical Applications, and Challenges. Front Neurol 2020; 11:812. [PMID: 33071923 PMCID: PMC7530891 DOI: 10.3389/fneur.2020.00812] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 06/29/2020] [Indexed: 12/13/2022] Open
Abstract
Stroke is one of the leading causes of morbidity and mortality worldwide, and it is increasing in prevalence. The limited therapeutic window and potential severe side effects prevent the widespread clinical application of the venous injection of thrombolytic tissue plasminogen activator and thrombectomy, which are regarded as the only approved treatments for acute ischemic stroke. Triggered by various types of mild stressors or stimuli, ischemic preconditioning (IPreC) induces adaptive endogenous tolerance to ischemia/reperfusion (I/R) injury by activating a multitude cascade of biomolecules, for example, proteins, enzymes, receptors, transcription factors, and others, which eventually lead to transcriptional regulation and epigenetic and genomic reprogramming. During the past 30 years, IPreC has been widely studied to confirm its neuroprotection against subsequent I/R injury, mainly including local ischemic preconditioning (LIPreC), remote ischemic preconditioning (RIPreC), and cross preconditioning. Although LIPreC has a strong neuroprotective effect, the clinical application of IPreC for subsequent cerebral ischemia is difficult. There are two main reasons for the above result: Cerebral ischemia is unpredictable, and LIPreC is also capable of inducing unexpected injury with only minor differences to durations or intensity. RIPreC and pharmacological preconditioning, an easy-to-use and non-invasive therapy, can be performed in a variety of clinical settings and appear to be more suitable for the clinical management of ischemic stroke. Hoping to advance our understanding of IPreC, this review mainly focuses on recent advances in IPreC in stroke management, its challenges, and the potential study directions.
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Affiliation(s)
| | | | | | | | | | - Di Ma
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
| | - Jiachun Feng
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
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12
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Chang HC, Yang YR, Wang RY. Effects of repetitive hyperbaric oxygen therapy on neuroprotection in middle cerebral artery occlusion rats. Brain Res 2020; 1748:147097. [PMID: 32896522 DOI: 10.1016/j.brainres.2020.147097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 02/07/2023]
Abstract
Hyperbaric oxygen (HBO) has been suggested as a possible therapy for brain injury. However, the effects of HBO after transient brain ischemia are inconsistent and the underlying mechanisms are not fully known. The present study aimed to investigate the effects of repetitive HBO intervention in a transient middle cerebral artery occlusion (MCAO) animal model. Seventy-two Sprague-Dawley rats received MCAO and were randomly assigned to normal air control or HBO intervention groups. Each group was divided into 3 subgroups according to the intervention time period (7, 14, and 21 days). HBO was started 24 h post-MCAO for 1 h/day at 3.0 ATA with no-air breaks. After the final intervention, half of the rats in each subgroup were sacrificed and the right motor cortex was removed to examine levels of Akt phosphorylation and glutathione (GSH), as well as glutathione peroxidase (GPx) and reductase (GR) activity. The other half of the rats were used to examine infarct volume. At 24 h post-MCAO and the end of the final intervention, rats underwent tests to examine motor performance. We noted that 14- and 21-day HBO interventions significantly reduced infarct volume and increased Akt phosphorylation and GSH levels and GPx and GR activity. Motor performance was also significantly improved after 14- and 21-day interventions. No significant differences were observed between the controls and 7-day intervention groups. Repetitive HBO intervention starting 24 h post-MCAO and applied for at least 14 days, provided neuroprotective effects through modulating the cell survival pathway and antioxidative defense system.
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Affiliation(s)
- Heng-Chih Chang
- Department of Physical Therapy, Asia University, Taichung, Taiwan, ROC
| | - Yea-Ru Yang
- Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Ray-Yau Wang
- Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, Taiwan, ROC.
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13
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Cozene B, Sadanandan N, Gonzales-Portillo B, Saft M, Cho J, Park YJ, Borlongan CV. An Extra Breath of Fresh Air: Hyperbaric Oxygenation as a Stroke Therapeutic. Biomolecules 2020; 10:E1279. [PMID: 32899709 PMCID: PMC7563917 DOI: 10.3390/biom10091279] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/26/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Stroke serves as a life-threatening disease and continues to face many challenges in the development of safe and effective therapeutic options. The use of hyperbaric oxygen therapy (HBOT) demonstrates pre-clinical effectiveness for the treatment of acute ischemic stroke and reports reductions in oxidative stress, inflammation, and neural apoptosis. These pathophysiological benefits contribute to improved functional recovery. Current pre-clinical and clinical studies are testing the applications of HBOT for stroke neuroprotection, including its use as a preconditioning regimen. Mild oxidative stress may be able to prime the brain to tolerate full extensive oxidative stress that occurs during a stroke, and HBOT preconditioning has displayed efficacy in establishing such ischemic tolerance. In this review, evidence on the use of HBOT following an ischemic stroke is examined, and the potential for HBOT preconditioning as a neuroprotective strategy. Additionally, HBOT as a stem cell preconditioning is also discussed as a promising strategy, thus maximizing the use of HBOT for ischemic stroke.
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Affiliation(s)
| | | | | | | | | | | | - Cesar V. Borlongan
- Department of Neurosurgery and Brain Repair, University of South Florida Morsani College of Medicine, 12901 Bruce B Downs Blvd, Tampa, FL 33612, USA; (B.C.); (N.S.); (B.G.-P.); (M.S.); (J.C.); (Y.J.P.)
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14
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Arachidonic Acid Metabolites of CYP450 Enzymes and HIF-1α Modulate Endothelium-Dependent Vasorelaxation in Sprague-Dawley Rats under Acute and Intermittent Hyperbaric Oxygenation. Int J Mol Sci 2020; 21:ijms21176353. [PMID: 32883025 PMCID: PMC7503979 DOI: 10.3390/ijms21176353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/26/2020] [Accepted: 08/29/2020] [Indexed: 01/12/2023] Open
Abstract
Acetylcholine-induced vasorelaxation (AChIR) and responses to reduced pO2 (hypoxia-induced relaxation (HIR), 0% O2) were assessed in vitro in aortic rings of healthy male Sprague-Dawley rats (N = 252) under hyperbaric (HBO2) protocols. The studied groups consisted of the CTRL group (untreated); the A-HBO2 group (single HBO2; 120 min of 100% O2 at 2.0 bars); the 24H-HBO2 group (examined 24 h after single exposure) and the 4D-HBO2 group (four consecutive days of single HBO2). AChIR, sensitivity to ACh and iNOS expression were decreased in the A-HBO2 group. HIR was prostanoid- and epoxyeicosatrienoic acid (EET)-mediated. HIF-1α expression was increased in the 24H-HBO2 and 4D-HBO2 groups. LW6 (HIF-1α inhibitor) decreased HIR in the 24H-HBO2 group. HBO2 affected the expression of COX-1 and COX-2. CYP2c11 expression was elevated in the 24H-HBO2 and 4D-HBO2 groups. Concentrations of arachidonic acid (AA) metabolites 14(15)-DiHET, 11(12)-DiHET and 8(9)-DiHET were increased in A-HBO2 and 24H-HBO2. An increased concentration of 8(9)-EET was observed in the A-HBO2 and 24h-HBO2 groups vs. the CTRL and 4D-HBO2 groups, and an increased concentration of 5(6)-DiHET was observed in the 24H-HBO2 group vs. the 4D-HBO2 group. The 20-HETE concentration was increased in the A-HBO2 group. All were determined by LC-MS/MS of the aorta. The results show that AChIR in all groups is mostly NO-dependent. HIR is undoubtedly mediated by the CYP450 enzymes’ metabolites of AA, whereas HIF-1α contributes to restored HIR. Vasoconstrictor metabolites of CYP450 enzymes contribute to attenuated AChIR and HIR in A-HBO2.
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Cheng YJ, Liu CC, Chu FY, Yang CP, Hsiao CW, Chuang CW, Shiau MY, Lee HT, Tsai JN, Chang YH. Oxygenated Water Inhibits Adipogenesis and Attenuates Hepatic Steatosis in High-Fat Diet-Induced Obese Mice. Int J Mol Sci 2020; 21:ijms21155493. [PMID: 32752112 PMCID: PMC7432369 DOI: 10.3390/ijms21155493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/16/2022] Open
Abstract
The expansion of adipose tissue mass is the primary characteristic of the process of becoming obesity, which causes chronic adipose inflammation and is closely associated with type 2 diabetes mellitus (T2DM). Adipocyte hypertrophy restricts oxygen availability, leading to microenvironmental hypoxia and adipose dysfunction. This study aimed at investigating the effects of oxygenated water (OW) on adipocyte differentiation (adipogenesis) and the metabolic function of mature adipocytes. The effects of OW on adipogenesis and the metabolic function of mature adipocytes were examined. Meanwhile, the in vivo metabolic effects of long-term OW consumption on diet-induced obesity (DIO) mice were investigated. OW inhibited adipogenesis and lipid accumulation through down-regulating critical adipogenic transcription factors and lipogenic enzymes. While body weight, blood and adipose parameters were not significantly improved by long-term OW consumption, transient circulatory triglyceride-lowering and glucose tolerance-improving effects were identified. Notably, hepatic lipid contents were significantly reduced, indicating that the DIO-induced hepatic steatosis was attenuated, despite no improvements in fibrosis and lipid contents in adipose tissue being observed in the OW-drinking DIO mice. The study provides evidence regarding OW’s effects on adipogenesis and mature adipocytes, and the corresponding molecular mechanisms. OW exhibits transient triglyceride-lowering and glucose tolerance-improving activity as well as hepatic steatosis-attenuating functions.
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Affiliation(s)
- Yuh-Jen Cheng
- Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan;
| | - Chao-Chi Liu
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.L.); (C.-P.Y.); (C.-W.C.)
| | - Fang-Yeh Chu
- Department of Clinical Pathology, Far Eastern Memorial Hospital, New Taipei City 220, Taiwan;
- Graduate School of Biotechnology and Bioengineering, Yuan Ze University, Taoyuan 320, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Yuanpei University, Hsinchu 300, Taiwan
- School of Medical Laboratory Science and Biotechnology, Taipei Medical University, Taipei 110, Taiwan
| | - Ching-Ping Yang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.L.); (C.-P.Y.); (C.-W.C.)
| | - Chiao-Wan Hsiao
- Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei 112, Taiwan;
| | - Cheng-Wei Chuang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.L.); (C.-P.Y.); (C.-W.C.)
| | - Ming-Yuh Shiau
- Department of Nursing, College of Nursing, Hungkuang University, Taichung 433, Taiwan;
| | - Hsueh-Te Lee
- Institute of Anatomy and Cell Biology, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan;
| | - Jen-Ning Tsai
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung 402, Taiwan;
- Clinical Laboratory, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Yih-Hsin Chang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.L.); (C.-P.Y.); (C.-W.C.)
- Correspondence: ; Tel.: +886-2-2826-7955; Fax: 886-2-2821-9240
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16
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Hadanny A, Efrati S. The Hyperoxic-Hypoxic Paradox. Biomolecules 2020; 10:biom10060958. [PMID: 32630465 PMCID: PMC7355982 DOI: 10.3390/biom10060958] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
Effective metabolism is highly dependent on a narrow therapeutic range of oxygen. Accordingly, low levels of oxygen, or hypoxia, are one of the most powerful inducers of gene expression, metabolic changes, and regenerative processes, including angiogenesis and stimulation of stem cell proliferation, migration, and differentiation. The sensing of decreased oxygen levels (hypoxia) or increased oxygen levels (hyperoxia), occurs through specialized chemoreceptor cells and metabolic changes at the cellular level, which regulate the response. Interestingly, fluctuations in the free oxygen concentration rather than the absolute level of oxygen can be interpreted at the cellular level as a lack of oxygen. Thus, repeated intermittent hyperoxia can induce many of the mediators and cellular mechanisms that are usually induced during hypoxia. This is called the hyperoxic-hypoxic paradox (HHP). This article reviews oxygen physiology, the main cellular processes triggered by hypoxia, and the cascade of events triggered by the HHP.
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Affiliation(s)
- Amir Hadanny
- The Sagol Center for Hyperbaric Medicine and Research, Shamir (Assaf-Harofeh) Medical Center, Zerifin 70300, Israel;
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat-Gan 5290002, Israel
- Correspondence: ; Tel.: +972-544707381; Fax: +972-8-9779748
| | - Shai Efrati
- The Sagol Center for Hyperbaric Medicine and Research, Shamir (Assaf-Harofeh) Medical Center, Zerifin 70300, Israel;
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- The Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv 6997801, Israel
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17
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Hadanny A, Efrati S. The Hyperoxic-Hypoxic Paradox. Biomolecules 2020; 10:biom10060958. [PMID: 32630465 DOI: 10.3390/biom1006095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 05/21/2023] Open
Abstract
Effective metabolism is highly dependent on a narrow therapeutic range of oxygen. Accordingly, low levels of oxygen, or hypoxia, are one of the most powerful inducers of gene expression, metabolic changes, and regenerative processes, including angiogenesis and stimulation of stem cell proliferation, migration, and differentiation. The sensing of decreased oxygen levels (hypoxia) or increased oxygen levels (hyperoxia), occurs through specialized chemoreceptor cells and metabolic changes at the cellular level, which regulate the response. Interestingly, fluctuations in the free oxygen concentration rather than the absolute level of oxygen can be interpreted at the cellular level as a lack of oxygen. Thus, repeated intermittent hyperoxia can induce many of the mediators and cellular mechanisms that are usually induced during hypoxia. This is called the hyperoxic-hypoxic paradox (HHP). This article reviews oxygen physiology, the main cellular processes triggered by hypoxia, and the cascade of events triggered by the HHP.
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Affiliation(s)
- Amir Hadanny
- The Sagol Center for Hyperbaric Medicine and Research, Shamir (Assaf-Harofeh) Medical Center, Zerifin 70300, Israel
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat-Gan 5290002, Israel
| | - Shai Efrati
- The Sagol Center for Hyperbaric Medicine and Research, Shamir (Assaf-Harofeh) Medical Center, Zerifin 70300, Israel
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- The Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv 6997801, Israel
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18
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Thiele RH, Osuru HP, Paila U, Ikeda K, Zuo Z. Impact of inflammation on brain subcellular energetics in anesthetized rats. BMC Neurosci 2019; 20:34. [PMID: 31307382 PMCID: PMC6631861 DOI: 10.1186/s12868-019-0514-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/25/2019] [Indexed: 02/07/2023] Open
Abstract
Background Emerging data suggests that volatile anesthetic agents may have organ protection properties in the setting of critical illness. The purpose of this study was to better understand the effect of inflammation on cerebral subcellular energetics in animals exposed to two different anesthetic agents—a GABA agonist (propofol) and a volatile agent (isoflurane). Results Forty-eight Sprague–Dawley rats were anesthetized with isoflurane or propofol. In each group, rats were randomized to celiotomy and closure (sham) or cecal ligation and puncture (inflammation [sepsis model]) for 8 h. Brain tissue oxygen saturation and the oxidation state of cytochrome aa3 were measured. Brain tissue was extracted using the freeze-blow technique. All rats experienced progressive increases in tissue oxygenation and cytochrome aa3 reduction over time. Inflammation had no impact on cytochrome aa3, but isoflurane caused significant cytochrome aa3 reduction. During isoflurane (not propofol) anesthesia, inflammation led to an increase in lactate (+ 0.64 vs. − 0.80 mEq/L, p = 0.0061). There were no differences in ADP:ATP ratios between groups. In the isoflurane (not propofol) group, inflammation increased the expression of hypoxia-inducible factor-1α (62%, p = 0.0012), heme oxygenase-1 (67%, p = 0.0011), and inducible nitric oxide synthase (31%, p = 0.023) in the brain. Animals exposed to inflammation and isoflurane (but not propofol) exhibited increased expression of protein carbonyls (9.2 vs. 7.0 nM/mg protein, p = 0.0050) and S-nitrosylation (49%, p = 0.045) in the brain. RNA sequencing identified an increase in heat shock protein 90 and NF-κβ inhibitor mRNA in the inflammation/isoflurane group. Conclusions In the setting of inflammation, rats exposed to isoflurane show increased hypoxia-inducible factor-1α expression despite a lack of hypoxia, increased oxidative stress in the brain, and increased serum lactate, all of which suggest a relative increase in anaerobic metabolism compared to propofol. Differences in oxidative stress as well as heat shock protein 90 and NF-κβ inhibitor may account for the differential expression of cerebral hypoxia-inducible factor-1α during inflammation. Electronic supplementary material The online version of this article (10.1186/s12868-019-0514-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Robert H Thiele
- Department of Anesthesiology, University of Virginia School of Medicine, P.O. Box 800710, Charlottesville, VA, 22908-0710, USA.
| | - Hari P Osuru
- Department of Anesthesiology, University of Virginia School of Medicine, P.O. Box 800710, Charlottesville, VA, 22908-0710, USA
| | - Umadevi Paila
- Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, USA
| | - Keita Ikeda
- Department of Anesthesiology, University of Virginia School of Medicine, P.O. Box 800710, Charlottesville, VA, 22908-0710, USA
| | - Zhiyi Zuo
- Department of Anesthesiology, University of Virginia School of Medicine, P.O. Box 800710, Charlottesville, VA, 22908-0710, USA
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19
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Buckey JC. Use of Gases to Treat Cochlear Conditions. Front Cell Neurosci 2019; 13:155. [PMID: 31068792 PMCID: PMC6491859 DOI: 10.3389/fncel.2019.00155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/08/2019] [Indexed: 12/03/2022] Open
Abstract
Although the cochlear vascular supply (stria vascularis) is designed to block to certain compounds and molecules, it must enable gas exchange to survive. The inner ear capillaries must deliver oxygen and remove carbon dioxide for the cochlea to function. These gases diffuse through tissues across a concentration gradient to reach the desired target. Tight junctions or the endothelial basement membrane do not impede them. Therefore, gases that can diffuse into the inner ear are attractive as therapeutic agents. The two gases most often used in this way are oxygen and hydrogen, although carbon dioxide, ozone, and argon have also been investigated. Typically, oxygen is delivered as hyperbaric oxygen (HBO) (oxygen at pressure higher than atmospheric) to provide increased oxygen levels to the inner ear. This not only relieves hypoxia, but also has anti-inflammatory and other biochemical effects. HBO is used clinically to treat idiopathic sudden sensorineural hearing loss, and both animal and human studies suggest it may also assist recovery after acute acoustic trauma. Laboratory studies suggest hydrogen works as a free radical scavenger and reduces the strong oxidants hydroxyl radicals and peroxynitrite. It also has anti-apoptotic effects. Because of its anti-oxidant and anti-inflammatory effects, it has been studied as a treatment for ototoxicity and shows benefit in an animal model of cisplatinum toxicity. Gas diffusion offers an effective way to provide therapy to the inner ear, particularly since some gases (oxygen, hydrogen, carbon dioxide, ozone, argon) have important therapeutic effects for minimizing cochlear damage.
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Affiliation(s)
- Jay C Buckey
- Space Medicine Innovations Laboratory, Center for Hyperbaric Medicine, Department of Medicine, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
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Chen W, Liang X, Nong Z, Li Y, Pan X, Chen C, Huang L. The Multiple Applications and Possible Mechanisms of the Hyperbaric Oxygenation Therapy. Med Chem 2018; 15:459-471. [PMID: 30569869 DOI: 10.2174/1573406415666181219101328] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/23/2018] [Accepted: 12/12/2018] [Indexed: 12/18/2022]
Abstract
Hyperbaric Oxygenation Therapy (HBOT) is used as an adjunctive method for multiple diseases. The method meets the routine treating and is non-invasive, as well as provides 100% pure oxygen (O2), which is at above-normal atmospheric pressure in a specialized chamber. It is well known that in the condition of O2 deficiency, it will induce a series of adverse events. In order to prevent the injury induced by anoxia, the capability of offering pressurized O2 by HBOT seems involuntary and significant. In recent years, HBOT displays particular therapeutic efficacy in some degree, and it is thought to be beneficial to the conditions of angiogenesis, tissue ischemia and hypoxia, nerve system disease, diabetic complications, malignancies, Carbon monoxide (CO) poisoning and chronic radiation-induced injury. Single and combination HBOT are both applied in previous studies, and the manuscript is to review the current applications and possible mechanisms of HBOT. The applicability and validity of HBOT for clinical treatment remain controversial, even though it is regarded as an adjunct to conventional medical treatment with many other clinical benefits. There also exists a negative side effect of accepting pressurized O2, such as oxidative stress injury, DNA damage, cellular metabolic, activating of coagulation, endothelial dysfunction, acute neurotoxicity and pulmonary toxicity. Then it is imperative to comprehensively consider the advantages and disadvantages of HBOT in order to obtain a satisfying therapeutic outcome.
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Affiliation(s)
- Wan Chen
- Department of Emergency, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, China
| | - Xingmei Liang
- Department of Pharmacy, Guangxi Medical College, Nanning, Guangxi 530021, China
| | - Zhihuan Nong
- Department of Pharmacology, Guangxi Institute of Chinese Medicine and Pharmaceutical Science, Nanning 530022, China
| | - Yaoxuan Li
- Department of Neurology, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530022, China
| | - Xiaorong Pan
- Department of Hyperbaric oxygen, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, China
| | - Chunxia Chen
- Department of Hyperbaric oxygen, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, China
| | - Luying Huang
- Department of Respiratory Medicine, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530021, China
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Hentia C, Rizzato A, Camporesi E, Yang Z, Muntean DM, Săndesc D, Bosco G. An overview of protective strategies against ischemia/reperfusion injury: The role of hyperbaric oxygen preconditioning. Brain Behav 2018; 8:e00959. [PMID: 29761012 PMCID: PMC5943756 DOI: 10.1002/brb3.959] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 02/12/2018] [Accepted: 02/18/2018] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Ischemia/reperfusion (I/R) injury, such as myocardial infarction, stroke, and peripheral vascular disease, has been recognized as the most frequent causes of devastating disorders and death currently. Protective effect of various preconditioning stimuli, including hyperbaric oxygen (HBO), has been proposed in the management of I/R. METHODS In this study, we searched and reviewed up-to-date published papers to explore the pathophysiology of I/R injury and to understand the mechanisms underlying the protective effect of HBO as conditioning strategy. RESULTS Animal study and clinic observation support the notion that HBO therapy and conditioning provide beneficial effect against the deleterious effects of postischemic reperfusion. Several explanations have been proposed. The first likely mechanism may be that HBO counteracts hypoxia and reduces I/R injury by improving oxygen delivery to an area with diminished blood flow. Secondly, by reducing hypoxia-ischemia, HBO reduces all the pathological events as a consequence of hypoxia, including tissue edema, increased affective area permeability, postischemia derangement of tissue metabolism, and inflammation. Thirdly, HBO may directly affect cell apoptosis, signal transduction, and gene expression in those that are sensitive to oxygen or hypoxia. HBO provides a reservoir of oxygen at cellular level not only carried by blood, but also by diffusion from the interstitial tissue where it reaches high concentration that may last for several hours, improves endothelial function and rheology, and decreases local inflammation and edema. CONCLUSION Evidence suggests the benefits of HBO when used as a preconditioning stimulus in the setting of I/R injury. Translating the beneficial effects of HBO into current practice requires, as for the "conditioning strategies", a thorough consideration of risk factors, comorbidities, and comedications that could interfere with HBO-related protection.
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Affiliation(s)
- Ciprian Hentia
- Master II level in Hyperbaric Medicine Department of Biomedical Sciences University of Padova Padova Italy.,Faculty of Medicine "Victor Babeș" University of Medicine and Pharmacy Timișoara Romania
| | - Alex Rizzato
- Master II level in Hyperbaric Medicine Department of Biomedical Sciences University of Padova Padova Italy
| | | | - Zhongjin Yang
- The Institute for Human Performance SUNY Upstate Medical University Syracuse NY USA
| | - Danina M Muntean
- Faculty of Medicine "Victor Babeș" University of Medicine and Pharmacy Timișoara Romania.,Center for Translational Research and Systems Medicine "Victor Babeș" University of Medicine and Pharmacy Timișoara Romania
| | - Dorel Săndesc
- Faculty of Medicine "Victor Babeș" University of Medicine and Pharmacy Timișoara Romania
| | - Gerardo Bosco
- Master II level in Hyperbaric Medicine Department of Biomedical Sciences University of Padova Padova Italy
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Hyperbaric Oxygen Preconditioning Attenuates Hemorrhagic Transformation Through Reactive Oxygen Species/Thioredoxin-Interacting Protein/Nod-Like Receptor Protein 3 Pathway in Hyperglycemic Middle Cerebral Artery Occlusion Rats. Crit Care Med 2017; 44:e403-11. [PMID: 26646457 DOI: 10.1097/ccm.0000000000001468] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVES To clarify whether hyperbaric oxygen preconditioning can attenuate hyperglycemia-enhanced hemorrhagic transformation and to establish a role for Nod-like receptor protein 3 inflammasome in the pathophysiology of hemorrhagic transformation. DESIGN Controlled prospective animal study. SETTING University research laboratory. SUBJECTS Male Sprague-Dawley rats weighing 260-280 g. INTERVENTIONS Rats received 1-hour-long hyperbaric oxygen preconditioning for five consecutive days. Hyperglycemic middle cerebral artery occlusion model was induced at 24 hours after the last hyperbaric oxygen exposure. Reactive oxygen species scavenger (N-acetyl-L-cysteine), thioredoxin-interacting protein small interfering RNA, and Nod-like receptor protein 3 small interfering RNA were given in different groups separately to verify the possible pathway. MEASUREMENTS AND MAIN RESULTS Rats were randomly divided into sham, middle cerebral artery occlusion, middle cerebral artery occlusion + dextrose, middle cerebral artery occlusion + dextrose + normobaric oxygen preconditioning, middle cerebral artery occlusion + dextrose + hyperbaric oxygen, middle cerebral artery occlusion + dextrose + hyperbaric oxygen + N-acetyl-L-cysteine, middle cerebral artery occlusion + dextrose + hyperbaric oxygen + control small interfering RNA, middle cerebral artery occlusion + dextrose + hyperbaric oxygen + thioredoxin-interacting protein small interfering RNA, and middle cerebral artery occlusion + dextrose + hyperbaric oxygen + Nod-like receptor protein 3 small interfering RNA groups. Hyperglycemia was induced by administration of 50% dextrose (6 mL/kg) intraperitoneally 30 minutes before middle cerebral artery occlusion. Control small interfering RNA/thioredoxin-interacting protein small interfering RNA or Nod-like receptor protein 3 small interfering RNA (500 pmol/5 μL) were injected intracerebroventricularly 72 hours before middle cerebral artery occlusion for intervention. The neurologic scores, infarction and hemorrhage volumes, the expression of Nod-like receptor protein 3, and its downstream targets were analyzed. Hyperbaric oxygen preconditioning decreased both infarction and hemorrhage volumes and improved neurobehavioral function. In addition, hyperbaric oxygen preconditioning provided additional protective effects in hemorrhagic transformation, which was independent of infarction volume. The benefits of hyperbaric oxygen preconditioning on hyperglycemic middle cerebral artery occlusion rats were reversed after blocking the reactive oxygen species/thioredoxin-interacting protein/Nod-like receptor protein 3 pathway. CONCLUSIONS Nod-like receptor protein 3 inflammasome played an important role in hyperglycemia-enhanced hemorrhagic transformation. Hyperbaric oxygen preconditioning attenuated hemorrhagic transformation through reactive oxygen species/thioredoxin-interacting protein/Nod-like receptor protein 3 pathway.
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Kim CH, McBride DW, Raval R, Sherchan P, Hay KL, Gren ECK, Kelln W, Lekic T, Hayes WK, Bull BS, Applegate R, Tang J, Zhang JH. Crotalus atrox venom preconditioning increases plasma fibrinogen and reduces perioperative hemorrhage in a rat model of surgical brain injury. Sci Rep 2017; 7:40821. [PMID: 28102287 PMCID: PMC5244360 DOI: 10.1038/srep40821] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/12/2016] [Indexed: 12/28/2022] Open
Abstract
Perioperative bleeding is a potentially devastating complication in neurosurgical patients, and plasma fibrinogen concentration has been identified as a potential modifiable risk factor for perioperative bleeding. The aim of this study was to evaluate preconditioning with Crotalus atrox venom (Cv-PC) as potential preventive therapy for reducing perioperative hemorrhage in the rodent model of surgical brain injury (SBI). C. atrox venom contains snake venom metalloproteinases that cleave fibrinogen into fibrin split products without inducing clotting. Separately, fibrinogen split products induce fibrinogen production, thereby elevating plasma fibrinogen levels. Thus, the hypothesis was that preconditioning with C. atrox venom will produce fibrinogen spilt products, thereby upregulating fibrinogen levels, ultimately improving perioperative hemostasis during SBI. We observed that Cv-PC SBI animals had significantly reduced intraoperative hemorrhage and postoperative hematoma volumes compared to those of vehicle preconditioned SBI animals. Cv-PC animals were also found to have higher levels of plasma fibrinogen at the time of surgery, with unchanged prothrombin time. Cv-PC studies with fractions of C. atrox venom suggest that snake venom metalloproteinases are largely responsible for the improved hemostasis by Cv-PC. Our findings indicate that Cv-PC increases plasma fibrinogen levels and may provide a promising therapy for reducing perioperative hemorrhage in elective surgeries.
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Affiliation(s)
- Cherine H Kim
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Devin W McBride
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Ronak Raval
- Department of Anesthesiology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Prativa Sherchan
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Karen L Hay
- Department of Anesthesiology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Eric C K Gren
- Department of Earth and Biological Sciences, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Wayne Kelln
- Department of Earth and Biological Sciences, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Tim Lekic
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA.,Department of Neurology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - William K Hayes
- Department of Earth and Biological Sciences, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Brian S Bull
- Department of Pathology and Human Anatomy, Loma Linda University School of Medicine, Loma Linda, California, USA
| | - Richard Applegate
- Department of Anesthesiology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - Jiping Tang
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
| | - John H Zhang
- Department of Physiology &Pharmacology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA.,Department of Anesthesiology, Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA.,Department of Neurosurgery Loma Linda University School of Medicine, 11175 Campus St, Loma Linda, CA 92350, USA
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Long Y, Tan J, Nie Y, Lu Y, Mei X, Tu C. Hyperbaric oxygen therapy is safe and effective for the treatment of sleep disorders in children with cerebral palsy. Neurol Res 2017; 39:239-247. [PMID: 28079475 DOI: 10.1080/01616412.2016.1275454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ying Long
- Department of Hyperbaric Oxygen Treatment, Shenzhen People’s Hospital, Shenzhen, P. R. China
| | - Jiewen Tan
- Department of Hyperbaric Oxygen Treatment, Sun Yat-Sen, Memorial Hospital, Sun Yat-Sen University, Guangzhou, P. R. China
- Xinhua College, Sun Yat-sen University, Guangzhou, P. R. China
| | - Yulin Nie
- Department of Hyperbaric Oxygen Treatment, 2nd Hospital of Longgang District, Shenzhen, China
| | - Yu Lu
- Department of Hyperbaric Oxygen Treatment, Shenzhen People’s Hospital, Shenzhen, P. R. China
| | - Xiufang Mei
- Department of Hyperbaric Oxygen Treatment, Shenzhen People’s Hospital, Shenzhen, P. R. China
| | - Chaoqun Tu
- Department of Hyperbaric Oxygen Treatment, Shenzhen People’s Hospital, Shenzhen, P. R. China
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25
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Poff AM, Kernagis D, D'Agostino DP. Hyperbaric Environment: Oxygen and Cellular Damage versus Protection. Compr Physiol 2016; 7:213-234. [PMID: 28135004 DOI: 10.1002/cphy.c150032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The elevation of tissue pO2 induced by hyperbaric oxygen (HBO) is a physiological stimulus that elicits a variety of cellular responses. These effects are largely mediated by, or in response to, an increase in the production of reactive oxygen and nitrogen species (RONS). The major consequences of elevated RONS include increased oxidative stress and enhanced antioxidant capacity, and modulation of redox-sensitive cell signaling pathways. Interestingly, these phenomena underlie both the therapeutic and potentially toxic effects of HBO. Emerging evidence indicates that supporting mitochondrial health is a potential method of enhancing the therapeutic efficacy of, and preventing oxygen toxicity during, HBO. This review will focus on the cellular consequences of HBO, and explore how these processes mediate a delicate balance of cellular protection versus damage. © 2017 American Physiological Society. Compr Physiol 7:213-234, 2017.
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Affiliation(s)
- Angela M Poff
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Dawn Kernagis
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Dominic P D'Agostino
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA.,Institute for Human and Machine Cognition, Pensacola, Florida, USA
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26
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Kamaleddin MA. The paradoxical pro- and antiangiogenic actions of resveratrol: therapeutic applications in cancer and diabetes. Ann N Y Acad Sci 2016; 1386:3-15. [PMID: 27880855 DOI: 10.1111/nyas.13283] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/24/2016] [Accepted: 09/29/2016] [Indexed: 02/06/2023]
Abstract
Resveratrol, a polyphenol found in grapes, peanuts, and red wine, plays different roles in diseases such as cancer and diabetes. Existing information indicates that resveratrol provides cardioprotection, as evidenced by superior postischemic ventricular recovery, reduced myocardial infarct size, and decreased number of apoptotic cardiomyocytes associated with resveratrol treatment in animal models. Cardiovascular benefits are experienced in humans with routine but not acute consumption of red wine. In this concise review, the paradoxical pro- and antiangiogenic effects of resveratrol are described, and different roles for resveratrol in the formation of new blood vessels are explained through different mechanisms. It is hypothesized that the effects of resveratrol on different cell types are not only dependent on its concentration but also on the physical and chemical conditions surrounding cells. The findings discussed herein shed light on potential therapeutic proapoptotic and antiangiogenic applications of low-dose resveratrol treatment in the prevention and treatment of different diseases.
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27
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Gamdzyk M, Małek M, Bratek E, Koks A, Kaminski K, Ziembowicz A, Salinska E. Hyperbaric oxygen and hyperbaric air preconditioning induces ischemic tolerance to transient forebrain ischemia in the gerbil. Brain Res 2016; 1648:257-265. [PMID: 27431936 DOI: 10.1016/j.brainres.2016.07.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/12/2016] [Accepted: 07/14/2016] [Indexed: 12/21/2022]
Abstract
Ischemic preconditioning with sublethal stress triggers defensive mechanisms against ischemic brain damage; however, such manipulations are potentially dangerous and, therefore, safe stimuli have been sought. Hyperoxia preconditioning by administration of hyperbaric (HBO) or normobaric oxygen (NBO) may have neuroprotective potential. The aim of this study was to determine whether preconditioning with HBO and air (HBA) applied at 2.5 absolute pressure (ATA) or NBO preconditioning induces ischemic tolerance in the brain of gerbils subjected to 3min transient cerebral ischemia. Neuronal cell survival, changes in brain temperature, the generation of factors involved in neurodegeneration and basic behavior in nest building were all tested. Hyperoxic preconditioning prevented ischemia-induced neuronal cell loss, reduced the number of TUNEL positive cells in the CA1 region of the hippocampus and improved the nest building process compared to untreated ischemic animals. Preconditioning also suppressed the production of reactive oxygen species and increased Bax expression normally observed after an ischemic episode. Only HBO preconditioning inhibited ischemia-evoked increases in brain temperature. Our results show that hyperoxic preconditioning results in induction of ischemic tolerance and prevents ischemia-induced neuronal damage in the gerbil brain. Pressurized air preconditioning was as effective as HBO or NBO preconditioning in providing neuroprotection. The observed neuroprotection probably results from mild oxidative stress evoked by increased brain tissue oxidation and activation of antioxidant and antiapoptotic defenses.
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Affiliation(s)
- Marcin Gamdzyk
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Michal Małek
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Ewelina Bratek
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Adam Koks
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Krzysztof Kaminski
- Department of Obstetrics and Gynecology, Medical University of Lublin, Lublin, Poland
| | - Apolonia Ziembowicz
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Elzbieta Salinska
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland.
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Cifu DX, Hoke KW, Wetzel PA, Wares JR, Gitchel G, Carne W. Effects of hyperbaric oxygen on eye tracking abnormalities in males after mild traumatic brain injury. ACTA ACUST UNITED AC 2015; 51:1047-56. [PMID: 25436771 DOI: 10.1682/jrrd.2014.01.0013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 04/30/2014] [Indexed: 11/05/2022]
Abstract
The effects of hyperbaric oxygen (HBO2) on eye movement abnormalities in 60 military servicemembers with at least one mild traumatic brain injury (TBI) from combat were examined in a single-center, randomized, double-blind, sham-controlled, prospective study at the Naval Medicine Operational Training Center. During the 10 wk of the study, each subject was delivered a series of 40, once a day, hyperbaric chamber compressions at a pressure of 2.0 atmospheres absolute (ATA). At each session, subjects breathed one of three preassigned oxygen fractions (10.5%, 75%, or 100%) for 1 h, resulting in an oxygen exposure equivalent to breathing either surface air, 100% oxygen at 1.5 ATA, or 100% oxygen at 2.0 ATA, respectively. Using a standardized, validated, computerized eye tracking protocol, fixation, saccades, and smooth pursuit eye movements were measured just prior to intervention and immediately postintervention. Between and within groups testing of pre- and postintervention means revealed no significant differences on eye movement abnormalities and no significant main effect for HBO2 at either 1.5 ATA or 2.0 ATA equivalent compared with the sham-control. This study demonstrated that neither 1.5 nor 2.0 ATA equivalent HBO2 had an effect on postconcussive eye movement abnormalities after mild TBI when compared with a sham-control.
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Affiliation(s)
- David X Cifu
- Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, VA
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29
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Fang J, Li H, Li G, Wang L. Effect of hyperbaric oxygen preconditioning on peri-hemorrhagic focal edema and aquaporin-4 expression. Exp Ther Med 2015; 10:699-704. [PMID: 26622378 DOI: 10.3892/etm.2015.2539] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 04/24/2015] [Indexed: 01/07/2023] Open
Abstract
The aim of the present study was to investigate the effect of hyperbaric oxygen preconditioning (HBO-PC) on peri-hemorrhagic focal edema and aquaporin-4 (AQP-4) expression in an experimental intracerebral hemorrhage (ICH) rat model. Sixty-six Sprague Dawley® rats were divided into three groups: The sham-surgery group (SHG; n=6); the control group (A-ICH; n=30), in which the rats were injected with autologous blood; and the experimental HBO-PC group (P-HBO; n=30). The rats underwent brain edema and AQP-4 detection at 5 postoperative time-points (24, 48 and 72 h and 5 and 7 days). The water content in the brain tissues of the A-ICH animals was higher than that in the brain tissues of the SHG rats at each time-point (P<0.05), and the edema in the P-HBO was significantly more severe 24 and 48 h postoperatively than that at 7 days postoperatively (P<0.05). The difference between the P-HBO and A-ICH was significant at 48 and 72 h postoperatively (P<0.05). AQP-4 was expressed in the post-hemorrhagic rat brains of all groups; the SHG animals exhibited low expression, while the A-ICH animals exhibited an increased expression 24 h postoperatively. In the A-ICH, expression peaked at 48 h postoperatively and began to decrease gradually after 72 h. At the 7-day time-point, the expression level in the A-ICH was closer to but still higher than that of the SHG animals (P<0.05). The differences between the P-HBO and A-ICH animals at the postoperative 24-h, 48-h and 7-day time-points were statistically significant (P<0.05). In conclusion, HBO-PC may downregulate AQP-4 expression to reduce the intracerebral edema, thus strengthening tolerance to ICH and protecting the nerves.
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Affiliation(s)
- Jinyong Fang
- Department of Rehabilitation, The People's Hospital of Zhangdian, Zibo, Shandong 255025, P.R. China
| | - Hongling Li
- Department of Rehabilitation, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Guanglei Li
- Department of Neurological Intervention, The Second Hospital of Qinhuangdao, Qinhuangdao, Hebei 066600, P.R. China
| | - Lichun Wang
- Department of Rehabilitation, Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine, Cangzhou, Hebei 061001, P.R. China
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Wu H, Wang H, Zhang B, Zhang G, Zhang R, Zhang L. Puerarin decreases hypoxia inducible factor-1 alpha in the hippocampus of vascular dementia rats. Neural Regen Res 2015; 7:421-5. [PMID: 25774183 PMCID: PMC4350127 DOI: 10.3969/j.issn.1673-5374.2012.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 01/16/2012] [Indexed: 12/31/2022] Open
Abstract
In this study, a rat vascular dementia model was established by permanent bilateral common carotid arterial occlusion. Rats were intraperitoneally injected with puerarin 3 days before modeling, for 45 successive days. Results demonstrated that in treated animals hippocampal structures were clear, nerve cells arranged neatly, and cytoplasm was rich in Nissl bodies. The number of cells positive for hypoxia inducible factor-1 alpha, erythropoietin and endothelial nitric oxide synthase was reduced; and the learning and memory abilities of rats were significantly improved. Our experimental findings indicate that puerarin can significantly improve learning and memory in a vascular dementia model, and that the underlying mechanism may be associated with the regulation of the expression of hypoxia inducible factor-1 alpha.
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Affiliation(s)
- Haiqin Wu
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Huqing Wang
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Bei Zhang
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Guilian Zhang
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Ru Zhang
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Lingfeng Zhang
- Department of Neurology, the Second Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
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31
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High-altitude pulmonary edema can be prevented by heat shock protein 70-mediated hyperbaric oxygen preconditioning. J Trauma Acute Care Surg 2015; 77:585-91. [PMID: 25250598 DOI: 10.1097/ta.0000000000000408] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND The primary goal of this study was to test whether high-altitude exposure (HAE of 9.7% O2 at 0.47 absolute atmosphere [ATA] for 3 days) was capable of increasing lung edema, neutrophil, and hemorrhage scores as well as decreasing lung levels of both aquaporin 1 (AQP1) and AQP5 proteins and messenger RNA (mRNA) expression in rats, with a secondary goal to test whether a preinduction of heat shock protein 70 (HSP70) by hyperbaric oxygen preconditioning (HBO2P of 100% O2 at 2.0 ATA for 1 hour per day for 5 consecutive days) attenuated the HAE-induced increased lung injury scores and decreased lung AQP1 and AQP5 protein and mRNA expressions. METHODS Rats were assigned to (1) non-HBO2P (21% O2 at 1.0 ATA) + non-HAE (21% O2 at 1.0 ATA) group; (2) non-HBO2P + HAE group; (3) HBO2P + HAE group; and HBO2P + HSP70 antibodies (Ab) + HAE group. For the HSP70 Ab group, a neutralizing HSP70 Ab was injected intravenously at 24 hours before HAE. All the physiologic and biochemical parameters were obtained at the end of HAE or the equivalent period of non-HAE. The cardiovascular and blood gas parameters were monitored for all experiments. Bronchoalveolar lavage (BAL) was performed to determine proinflammatory cytokines (interleukin 6, interleukin 1β, and tumor necrosis factor α). Parts of the lung were excised for myeloperoxidase activity measurement, whereas the rest was collected for lung damage score assessments. AQP1 and AQP5 protein and mRAN expressions were also determined in the lung tissues. RESULTS In the non-HBO2P + HAE group, the animals displayed higher values of lung myeloperoxidase activity, BAL proinflammatory cytokines, lung water weight, and acute lung injury scores compared with those of the non-HBO2P + non-HAE controls. In contrast, the non-HBO2P + HAE group rats had lower values of lung AQP1 and AQP5 protein and mRNA expressions, mean arterial pressure, heart rate, SO2, Paco2, HCO3, and pH compared with those of non-HBO2P + non-HAE group rats. The increased acute lung edema, neutrophil, and hemorrhage scores; increased BAL levels of proinflammatory cytokines; decreased lung AQP1 and AQP5 protein and mRNA expressions; and hypotension, bradycardia, hypoxia, and acidosis caused by HAE were all significantly attenuated by HBO2P. CONCLUSION Our data indicate that HBO2P may attenuate high-altitude acute lung injury by a preinduction of lung HSP70 in rats.
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Ding Z, Tong WC, Lu XX, Peng HP. Hyperbaric oxygen therapy in acute ischemic stroke: a review. INTERVENTIONAL NEUROLOGY 2014; 2:201-11. [PMID: 25337089 PMCID: PMC4188156 DOI: 10.1159/000362677] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Stroke, also known as cerebrovascular disease, is a common and serious neurological disease, which is also the fourth leading cause of death in the United States so far. Hyperbaric medicine, as an emerging interdisciplinary subject, has been applied in the treatment of cerebral vascular diseases since the 1960s. Now it is widely used to treat a variety of clinical disorders, especially hypoxia-induced disorders. However, owing to the complex mechanisms of hyperbaric oxygen (HBO) treatment, the therapeutic time window and the undefined dose as well as some common clinical side effects (such as middle ear barotrauma), the widespread promotion and application of HBO was hindered, slowing down the hyperbaric medicine development. In August 2013, the US Food and Drug Administration declared artery occlusion as one of the 13 specific indications for HBO therapy. This provides opportunities, to some extent, for the further development of hyperbaric medicine. Currently, the mechanisms of HBO therapy for ischemic stroke are still not very clear. This review focuses on the potential mechanisms of HBO therapy in acute ischemic stroke as well as the time window.
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Affiliation(s)
- Zheng Ding
- Department of Hyperbaric Oxygen, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou, China
| | - Wesley C. Tong
- Department of Rehabilitation Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiao-Xin Lu
- Department of Hyperbaric Oxygen, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou, China
| | - Hui-Ping Peng
- Department of Hyperbaric Oxygen, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou, China
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Dulai PS, Gleeson MW, Taylor D, Holubar SD, Buckey JC, Siegel CA. Systematic review: The safety and efficacy of hyperbaric oxygen therapy for inflammatory bowel disease. Aliment Pharmacol Ther 2014; 39:1266-75. [PMID: 24738651 DOI: 10.1111/apt.12753] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/02/2013] [Accepted: 03/25/2014] [Indexed: 12/23/2022]
Abstract
BACKGROUND Hyperbaric oxygen therapy (HBOT) provides 100% oxygen under pressure, which increases tissue oxygen levels, relieves hypoxia and alters inflammatory pathways. Although there is experience using HBOT in Crohn's disease and ulcerative colitis, the safety and overall efficacy of HBOT in inflammatory bowel disease (IBD) is unknown. AIM To quantify the safety and efficacy of HBOT for Crohn's disease (CD) and ulcerative colitis (UC). The rate of adverse events with HBOT for IBD was compared to the expected rate of adverse events with HBOT. METHODS MEDLINE, EMBASE, Cochrane Collaboration and Web of Knowledge were systematically searched using the PRISMA standards for systematic reviews. Seventeen studies involving 613 patients (286 CD, 327 UC) were included. RESULTS The overall response rate was 86% (85% CD, 88% UC). The overall response rate for perineal CD was 88% (18/40 complete healing, 17/40 partial healing). Of the 40 UC patients with endoscopic follow-up reported, the overall response rate to HBOT was 100%. During the 8924 treatments, there were a total of nine adverse events, six of which were serious. The rate of adverse events with HBOT in IBD is lower than that seen when utilising HBOT for other indications (P < 0.01). The risk of bias across studies was high. CONCLUSIONS Hyperbaric oxygen therapy is a relatively safe and potentially efficacious treatment option for IBD patients. To understand the true benefit of HBOT in IBD, well-controlled, blinded, randomised trials are needed for both Crohn's disease and ulcerative colitis.
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Affiliation(s)
- P S Dulai
- Inflammatory Bowel Disease Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA; Center for Hyperbaric Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
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Hu Q, Liang X, Chen D, Chen Y, Doycheva D, Tang J, Tang J, Zhang JH. Delayed hyperbaric oxygen therapy promotes neurogenesis through reactive oxygen species/hypoxia-inducible factor-1α/β-catenin pathway in middle cerebral artery occlusion rats. Stroke 2014; 45:1807-14. [PMID: 24757104 DOI: 10.1161/strokeaha.114.005116] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Hyperbaric oxygen (HBO) has been reported to be neuroprotective and to improve neurofunctional outcomes in acute stroke. However, it is not clear whether delayed HBO enhances endogenous neurogenesis and promotes neurofunctional recovery. The aim of this study is to evaluate the effects of delayed HBO therapy on neurogenesis and its potential mechanisms. METHODS One hundred eleven male Sprague-Dawley rats that survived for 7 days from 2 hours of middle cerebral artery occlusion and reperfusion were used. Delayed and multiple HBO were administrated beginning at 7 days after middle cerebral artery occlusion and lasting for 42 days with 3 HBO-free intervals (5 days each). Motor sensory deficits were measured by foot-fault test, and learning and memory abilities were evaluated by Morris water maze. Neurogenesis was examined by double immunostaining of bromodeoxyuridine and doublecortin, bromodeoxyuridine and neuronal nuclei at day 42. For mechanism studies, inhibitors for reactive oxygen species (ROS), hypoxia-inducible factor (HIF)-1α, and β-catenin were administrated, and the levels of ROS, HIF-1α, β-catenin, lymphoid enhancer-binding factor-1, T-cell factor-1, neurogenin-1, doublecortin, and synapsin-1 were assessed by ELISA or Western blot at day 14. RESULTS Delayed HBO treatment promoted neurogenesis and improved neurofunctional recovery at day 42, and the improvements were reversed by inhibition of ROS and HIF-1α. Delayed HBO significantly increased ROS and HIF-1α, and upregulated the expression of neurogenin-1, doublecortin, and synapsin-1. Inhibition of ROS and HIF-1α removed the effects of delayed HBO. CONCLUSIONS Delayed HBO enhanced endogenous neurogenesis and improved neurofunctional recovery in the late-chronic phase of stroke possibly mediated by ROS/HIF-1α/β-catenin pathway. Delayed HBO may serve as an alternative treatment to improve long-term recovery of stroke survivors.
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Affiliation(s)
- Qin Hu
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Xiping Liang
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Di Chen
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Yujie Chen
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Desislava Doycheva
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Junjia Tang
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - Jiping Tang
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.)
| | - John H Zhang
- From the Departments of Physiology and Pharmacology (Q.H., X.L., D.C., Y.C., D.D., Junjia Tang, Jiping Tang, J.H.Z.) and Department of Neurosurgery, Loma Linda University School of Medicine, CA (J.H.Z.).
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Chen F, Qi Z, Luo Y, Hinchliffe T, Ding G, Xia Y, Ji X. Non-pharmaceutical therapies for stroke: mechanisms and clinical implications. Prog Neurobiol 2014; 115:246-69. [PMID: 24407111 PMCID: PMC3969942 DOI: 10.1016/j.pneurobio.2013.12.007] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 12/19/2013] [Accepted: 12/27/2013] [Indexed: 12/14/2022]
Abstract
Stroke is deemed a worldwide leading cause of neurological disability and death, however, there is currently no promising pharmacotherapy for acute ischemic stroke aside from intravenous or intra-arterial thrombolysis. Yet because of the narrow therapeutic time window involved, thrombolytic application is very restricted in clinical settings. Accumulating data suggest that non-pharmaceutical therapies for stroke might provide new opportunities for stroke treatment. Here we review recent research progress in the mechanisms and clinical implications of non-pharmaceutical therapies, mainly including neuroprotective approaches such as hypothermia, ischemic/hypoxic conditioning, acupuncture, medical gases and transcranial laser therapy. In addition, we briefly summarize mechanical endovascular recanalization devices and recovery devices for the treatment of the chronic phase of stroke and discuss the relative merits of these devices.
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Affiliation(s)
- Fan Chen
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, Beijing, Beijing 100053, China
| | - Zhifeng Qi
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, Beijing, Beijing 100053, China
| | - Yuming Luo
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, Beijing, Beijing 100053, China
| | - Taylor Hinchliffe
- The Vivian L. Smith Department of Neurosurgery, The University of Texas Medical School at Houston, Houston, TX 77030, USA
| | - Guanghong Ding
- Shanghai Research Center for Acupuncture and Meridian, Shanghai 201203, China
| | - Ying Xia
- The Vivian L. Smith Department of Neurosurgery, The University of Texas Medical School at Houston, Houston, TX 77030, USA.
| | - Xunming Ji
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, Beijing, Beijing 100053, China.
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Garcia-Bonilla L, Benakis C, Moore J, Iadecola C, Anrather J. Immune mechanisms in cerebral ischemic tolerance. Front Neurosci 2014; 8:44. [PMID: 24624056 PMCID: PMC3940969 DOI: 10.3389/fnins.2014.00044] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 02/17/2014] [Indexed: 12/21/2022] Open
Abstract
Stressor-induced tolerance is a central mechanism in the response of bacteria, plants, and animals to potentially harmful environmental challenges. This response is characterized by immediate changes in cellular metabolism and by the delayed transcriptional activation or inhibition of genetic programs that are not generally stressor specific (cross-tolerance). These programs are aimed at countering the deleterious effects of the stressor. While induction of this response (preconditioning) can be established at the cellular level, activation of systemic networks is essential for the protection to occur throughout the organs of the body. This is best signified by the phenomenon of remote ischemic preconditioning, whereby application of ischemic stress to one tissue or organ induces ischemic tolerance (IT) in remote organs through humoral, cellular and neural signaling. The immune system is an essential component in cerebral IT acting simultaneously both as mediator and target. This dichotomy is based on the fact that activation of inflammatory pathways is necessary to establish IT and that IT can be, in part, attributed to a subdued immune activation after index ischemia. Here we describe the components of the immune system required for induction of IT and review the mechanisms by which a reprogrammed immune response contributes to the neuroprotection observed after preconditioning. Learning how local and systemic immune factors participate in endogenous neuroprotection could lead to the development of new stroke therapies.
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Affiliation(s)
- Lidia Garcia-Bonilla
- Brain and Mind Research Institute, Weill Cornell Medical College New York, NY, USA
| | - Corinne Benakis
- Brain and Mind Research Institute, Weill Cornell Medical College New York, NY, USA
| | - Jamie Moore
- Brain and Mind Research Institute, Weill Cornell Medical College New York, NY, USA
| | - Costantino Iadecola
- Brain and Mind Research Institute, Weill Cornell Medical College New York, NY, USA
| | - Josef Anrather
- Brain and Mind Research Institute, Weill Cornell Medical College New York, NY, USA
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Liu W, Liu K, Tao H, Chen C, Zhang JH, Sun X. Hyperoxia preconditioning: the next frontier in neurology? Neurol Res 2013; 34:415-21. [DOI: 10.1179/1743132812y.0000000034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Wenwu Liu
- Department of Diving MedicineThe Second Military Medical University, Shanghai, China
| | - Kan Liu
- Department of Diving MedicineThe Second Military Medical University, Shanghai, China
| | - Hengyi Tao
- Department of Diving MedicineThe Second Military Medical University, Shanghai, China
| | - Chunhua Chen
- Department of Anatomy and EmbryologyPeking University Health Science Center, Beijing, China
| | - John H Zhang
- Department of AnesthesiologyLoma Linda Medical Center, Loma Linda, CA, USA
| | - Xuejun Sun
- Department of Diving MedicineThe Second Military Medical University, Shanghai, China
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Ye Z, Ye W, Deng Y, Wang J, Zhou G, Zhang X. HIF-1-modified BMSCs improve migration and reduce neuronal apoptosis after stroke in rats. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s11434-013-5936-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Eftedal I, Ljubkovic M, Flatberg A, Jørgensen A, Brubakk AO, Dujic Z. Acute and potentially persistent effects of scuba diving on the blood transcriptome of experienced divers. Physiol Genomics 2013; 45:965-72. [PMID: 23964024 DOI: 10.1152/physiolgenomics.00164.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
During scuba diving, the circulatory system is stressed by an elevated partial pressure of oxygen while the diver is submerged and by decompression-induced gas bubbles on ascent to the surface. This diving-induced stress may trigger decompression illness, but the majority of dives are asymptomatic. In this study we have mapped divers' blood transcriptomes with the aim of identifying genes, biological pathways, and cell types perturbed by the physiological stress in asymptomatic scuba diving. Ten experienced divers abstained from diving for >2 wk before performing a 3-day series of daily dives to 18 m depth for 47 min while breathing compressed air. Blood for microarray analysis was collected before and immediately after the first and last dives, and 10 matched nondivers provided controls for predive stationary transcriptomes. MetaCore GeneGo analysis of the predive samples identified stationary upregulation of genes associated with apoptosis, inflammation, and innate immune responses in the divers, most significantly involving genes in the TNFR1 pathway of caspase-dependent apoptosis, HSP60/HSP70 signaling via TLR4, and NF-κB-mediated transcription. Diving caused pronounced shifts in transcription patterns characteristic of specific leukocytes, with downregulation of genes expressed by CD8+ T lymphocytes and NK cells and upregulation of genes expressed by neutrophils, monocytes, and macrophages. Antioxidant genes were upregulated. Similar transient responses were observed after the first and last dive. The results indicate that sublethal oxidative stress elicits the myeloid innate immune system in scuba diving and that extensive diving may cause persistent change in pathways controlling apoptosis, inflammation, and innate immune responses.
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Affiliation(s)
- Ingrid Eftedal
- Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
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Cevik NG, Orhan N, Yilmaz CU, Arican N, Ahishali B, Kucuk M, Kaya M, Toklu AS. The effects of hyperbaric air and hyperbaric oxygen on blood-brain barrier integrity in rats. Brain Res 2013; 1531:113-21. [PMID: 23920007 DOI: 10.1016/j.brainres.2013.07.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 07/25/2013] [Accepted: 07/29/2013] [Indexed: 01/07/2023]
Abstract
Hyperbaric oxygen (HBO) treatment yields conflicting results on blood-brain barrier (BBB) integrity under various pathological conditions and the effects of HBO on healthy brain is poorly understood. In this experimental study, the effects of HBO on BBB integrity were investigated in comparison with hyperbaric air (HBA) in intact rats. Four sessions of HBA or HBO were applied to intact rats in 24h. BBB integrity was functionally and structurally evaluated by determining extravasation of Evans blue (EB) dye and horseradish peroxidase (HRP) tracers. In immunohistochemical evaluation, relative staining intensity for occludin, a tight junction (TJ) protein, and aquaporin 4 (AQP4), a water-channel protein, was detected in the barrier type of microvessels of brain by image analysis. BBB permeability to EB dye significantly increased in animals in HBO treatment group compared to those in HBA and control groups (p<0.05). The immunoreactivity of occludin, a tight junction protein, remained essentially unaltered in capillaries of hippocampus in all groups. In animals exposed to HBO, AQP4 immunoreactivity significantly increased in parietal cortex compared to those in HBA and control groups (p<0.01). Ultrastructurally, frequent vesicles containing HRP reaction products were observed in capillary endothelial cells in cerebral cortex and hippocampus of rats subjected to both HBA and HBO. Our results indicate that the HBO administration to intact rats increased BBB permeability to both EB and HRP while HBA increased only HRP extravasation in these animals. The results of this study suggest that HBA also impairs the BBB integrity in intact rats as well as HBO.
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Affiliation(s)
- Nihal Gunes Cevik
- Department of Underwater and Hyperbaric Medicine, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
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Soejima Y, Hu Q, Krafft PR, Fujii M, Tang J, Zhang JH. Hyperbaric oxygen preconditioning attenuates hyperglycemia-enhanced hemorrhagic transformation by inhibiting matrix metalloproteinases in focal cerebral ischemia in rats. Exp Neurol 2013; 247:737-43. [PMID: 23537951 DOI: 10.1016/j.expneurol.2013.03.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 03/07/2013] [Accepted: 03/15/2013] [Indexed: 10/27/2022]
Abstract
Hyperglycemia dramatically aggravates brain infarct and hemorrhagic transformation (HT) after ischemic stroke. Oxidative stress and matrix metalloproteinases (MMPs) play an important role in the pathophysiology of HT. Hyperbaric oxygen preconditioning (HBO-PC) has been proved to decrease oxidative stress and has been demonstrated to be neuroprotective in experimental stroke models. The present study determined whether HBO-PC would ameliorate HT by a pre-ischemic increase of reactive oxygen species (ROS) generation, and a suppression of MMP-2 and MMP-9 in hyperglycemic middle cerebral artery occlusion (MCAO) rats. Rats were pretreated with HBO (100% O₂, 2.5 atmosphere absolutes) 1 h daily for 5 days before MCAO. Acute hyperglycemia was induced by an injection of 50% dextrose. Neurological deficits, infarction volume and hemorrhagic volume were assessed 24 h and 7 days after ischemia. ROS scavenger n-acetyl cysteine (NAC), hypoxia-inducible factor-1α (HIF-1α), inhibitor 2-methoxyestradiol (2ME2) and activator cobalt chloride (CoCl₂), and MMP inhibitor SB-3CT were administrated for mechanism study. The activity of MMP-2 and MMP-9, and the expression HIF-1α were measured. HBO-PC improved neurological deficits, and reduced hemorrhagic volume; the expression of HIF-1α was significantly decreased, and the activity of MMP-2 and MMP-9 was reduced by HBO-PC compared with vehicle group. Our results suggested that HBO-PC attenuated HT via decreasing HIF-1α and its downstream MMP-2 and MMP-9 in hyperglycemic MCAO rats.
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Affiliation(s)
- Yoshiteru Soejima
- Department of Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
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Wang CT, Lin HJ, Cheng BC, Lin MT, Chang CP. Attenuating systemic inflammatory markers in simulated high-altitude exposure by heat shock protein 70-mediated hypobaric hypoxia preconditioning in rats. J Formos Med Assoc 2013; 114:328-38. [PMID: 25839766 DOI: 10.1016/j.jfma.2012.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/22/2012] [Accepted: 11/23/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND/PURPOSE The primary goal of this study was to test whether high-altitude exposure (HAE: 0.9% O(2) at 0.47 ATA for 24 hours) was capable of increasing the systemic inflammatory markers as well as the toxic organ injury indicators in rats, with a secondary goal to test whether preinduction of heat shock protein (HSP) 70 by hypobaric hypoxia preconditioning (HHP: 18.3% O(2) at 0.66 ATA for 5 h/day on 5 days consecutively for 2 weeks) attenuated the proposed increased serum levels of both the systemic inflammatory markers and the toxic organ injury indicators. METHODS Rats were assigned to: (1) non-HHP (21% O(2) at 1.0 ATA)+non-HAE (21% O(2) at 1.0 ATA) group; (2) non-HHP+HAE group; (3) HHP+non-HAE group; (4) HHP+HAE group; and (5) HHP+HSP70 antibodies (Ab)+HAE group. For the HSP70Ab group, a neutralizing HSP70Ab was injected intravenously at 24 hours prior to HAE. All the physiological and biochemical parameters were obtained at the end of HAE or the equivalent time period of non-HAE. Blood samples were obtained for determination of both the systemic inflammatory markers (e.g., serum tumor necrosis factor-α, interleukin-1β, E-selectin, intercellular adhesion molecule-1, and liver myeloperoxidase activity) and the toxic organ injury indicators (e.g., nitric oxide metabolites, 2,3-dihydroxybenzoic acid, and lactate dehydrogenase). RESULTS HHP, in addition to inducing overexpression of tissue HSP70, significantly attenuated the HAE-induced hypotension, bradycardia, hypoxia, acidosis, and increased tissue levels of both the systemic inflammatory markers and the toxic organ injury indicators. The beneficial effects of HHP in inducing tissue overexpression of HSP70 as well as in preventing the HAE-induced increased levels of the systemic inflammatory markers and the toxic organ injury indicators could be significantly reduced by HSP70Ab preconditioning. CONCLUSION These results suggest that HHP may downgrade both the systemic inflammatory markers and the toxic organ injury indicators in HAE by upregulating tissue HSP70.
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Affiliation(s)
- Chia-Ti Wang
- Department of Emergency Medicine, Chi Mei Medical Center, Tainan, Taiwan
| | - Hung-Jung Lin
- Department of Emergency Medicine, Chi Mei Medical Center, Tainan, Taiwan; Department of Biotechnology, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Bor-Chih Cheng
- Department of Biotechnology, Southern Taiwan University of Science and Technology, Tainan, Taiwan; Department of Surgery, Chi Mei Medical Center, Tainan, Taiwan
| | - Mao-Tsun Lin
- Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan
| | - Ching-Ping Chang
- Department of Biotechnology, Southern Taiwan University of Science and Technology, Tainan, Taiwan.
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Eftedal I, Jørgensen A, Røsbjørgen R, Flatberg A, Brubakk AO. Early genetic responses in rat vascular tissue after simulated diving. Physiol Genomics 2012; 44:1201-7. [PMID: 23132759 DOI: 10.1152/physiolgenomics.00073.2012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Diving causes a transient reduction of vascular function, but the mechanisms behind this are largely unknown. The aim of this study was therefore to analyze genetic reactions that may be involved in acute changes of vascular function in divers. Rats were exposed to 709 kPa of hyperbaric air (149 kPa Po(2)) for 50 min followed by postdive monitoring of vascular bubble formation and full genome microarray analysis of the aorta from diving rats (n = 8) and unexposed controls (n = 9). Upregulation of 23 genes was observed 1 h after simulated diving. The differential gene expression was characteristic of cellular responses to oxidative stress, with functions of upregulated genes including activation and fine-tuning of stress-responsive transcription, cytokine/cytokine receptor signaling, molecular chaperoning, and coagulation. By qRT-PCR, we verified increased transcription of neuron-derived orphan receptor-1 (Nr4a3), plasminogen activator inhibitor 1 (Serpine1), cytokine TWEAK receptor FN14 (Tnfrsf12a), transcription factor class E basic helix-loop-helix protein 40 (Bhlhe40), and adrenomedullin (Adm). Hypoxia-inducible transcription factor HIF1 subunit HIF1-α was stabilized in the aorta 1 h after diving, and after 4 h there was a fivefold increase in total protein levels of the procoagulant plasminogen activator inhibitor 1 (PAI1) in blood plasma from diving rats. The study did not have sufficient power for individual assessment of effects of hyperoxia and decompression-induced bubbles on postdive gene expression. However, differential gene expression in rats without venous bubbles was similar to that of all the diving rats, indicating that elevated Po(2) instigated the observed genetic reactions.
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Affiliation(s)
- Ingrid Eftedal
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.
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Malek M, Duszczyk M, Zyszkowski M, Ziembowicz A, Salinska E. Hyperbaric oxygen and hyperbaric air treatment result in comparable neuronal death reduction and improved behavioral outcome after transient forebrain ischemia in the gerbil. Exp Brain Res 2012; 224:1-14. [PMID: 23283415 PMCID: PMC3535395 DOI: 10.1007/s00221-012-3283-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 09/19/2012] [Indexed: 12/20/2022]
Abstract
Anoxic brain injury resulting from cardiac arrest is responsible for approximately two-thirds of deaths. Recent evidence suggests that increased oxygen delivered to the brain after cardiac arrest may be an important factor in preventing neuronal damage, resulting in an interest in hyperbaric oxygen (HBO) therapy. Interestingly, increased oxygen supply may be also reached by application of normobaric oxygen (NBO) or hyperbaric air (HBA). However, previous research also showed that the beneficial effect of hyperbaric treatment may not directly result from increased oxygen supply, leading to the conclusion that the mechanism of hyperbaric prevention of brain damage is not well understood. The aim of our study was to compare the effects of HBO, HBA and NBO treatment on gerbil brain condition after transient forebrain ischemia, serving as a model of cardiac arrest. Thereby, we investigated the effects of repetitive HBO, HBA and NBO treatment on hippocampal CA1 neuronal survival, brain temperature and gerbils behavior (the nest building), depending on the time of initiation of the therapy (1, 3 and 6 h after ischemia). HBO and HBA applied 1, 3 and 6 h after ischemia significantly increased neuronal survival and behavioral performance and abolished the ischemia-evoked brain temperature increase. NBO treatment was most effective when applied 1 h after ischemia; later application had a weak or no protective effect. The results show that HBO and HBA applied between 1 and 6 h after ischemia prevent ischemia-evoked neuronal damage, which may be due to the inhibition of brain temperature increase, as a result of the applied rise in ambient pressure, and just not due to the oxygen per se. This perspective is supported by the finding that NBO treatment was less effective than HBO or HBA therapy. The results presented in this paper may pave the way for future experimental studies dealing with pressure and temperature regulation.
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Affiliation(s)
- Michal Malek
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106 Warsaw, Poland
| | - Malgorzata Duszczyk
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106 Warsaw, Poland
| | - Marcin Zyszkowski
- Department of Anesthesiology and Intensive Care, Military Institute of Medicine, Warsaw, Poland
| | - Apolonia Ziembowicz
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106 Warsaw, Poland
| | - Elzbieta Salinska
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106 Warsaw, Poland
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Reducing pulmonary injury by hyperbaric oxygen preconditioning during simulated high altitude exposure in rats. ACTA ACUST UNITED AC 2012; 71:673-9. [PMID: 21248653 DOI: 10.1097/ta.0b013e3181f5b073] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Hyperbaric oxygen preconditioning (HBO₂P + HAE) has been found to be beneficial in preventing the occurrence of ischemic damage to brain, spinal cord, heart, and liver in several disease models. In addition, pulmonary inflammation and edema are associated with a marked reduction in the expression levels of both aquaporin (AQP) 1 and AQP5 in the lung. Here, the aims of this study are first to ascertain whether acute lung injury can be induced by simulated high altitude in rats and second to assess whether HBO2P + HAE is able to prevent the occurrence of the proposed high altitude-induced ALI. METHODS Rats were randomly divided into the following three groups: the normobaric air (NBA; 21% O₂ at 1 ATA) group, the HBO₂P + high altitude exposure (HAE) group, and the NBA + HAE group. In HBO₂P + HAE group, animals received 100% O₂ at 2.0 ATA for 1 hour per day, for five consecutive days. In HAE groups, animals were exposed to a simulated HAE of 6,000 m in a hypobaric chamber for 24 hours. Right after being taken out to the ambient, animals were anesthetized generally and killed and thoroughly exsanguinated before their lungs were excised en bloc. The lungs were used for both histologic and molecular evaluation and analysis. RESULTS In NBA + HAE group, the animals displayed higher scores of alveolar edema, neutrophil infiltration, and hemorrhage compared with those of NBA controls. In contrast, the levels of both AQP1 and AQP5 proteins and mRNA expression in the lung in the NBA + HAE group were significantly lower than those of NBA controls. However, the increased lung injury scores and the decreased levels of both AQP1 and AQP5 proteins and mRNA expression in the lung caused by HAE was significantly reduced by HBO₂P + HAE. CONCLUSIONS Our results suggest that high altitude pulmonary injury may be prevented by HBO2P + HAE in rats.
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Dayan K, Keser A, Konyalioglu S, Erturk M, Aydin F, Sengul G, Dagci T. The effect of hyperbaric oxygen on neuroregeneration following acute thoracic spinal cord injury. Life Sci 2012; 90:360-4. [DOI: 10.1016/j.lfs.2011.12.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 11/19/2011] [Accepted: 12/14/2011] [Indexed: 01/27/2023]
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Sims B, Clarke M, Francillion L, Kindred E, Hopkins ES, Sontheimer H. Hypoxic preconditioning involves system Xc- regulation in mouse neural stem cells. Stem Cell Res 2011; 8:285-91. [PMID: 22056639 DOI: 10.1016/j.scr.2011.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 08/08/2011] [Accepted: 09/19/2011] [Indexed: 10/17/2022] Open
Abstract
In animals, hypoxic preconditioning has been used as a form of neuroprotection. The exact mechanism involved in neuroprotective hypoxic preconditioning has not been described, yet could be valuable for possible neuroprotective strategies. The overexpression of the cystine-glutamate exchanger, system Xc-, has been demonstrated as being neuroprotective (Shih, Erb et al. 2006). Here, using immunohistochemistry, we demonstrate that C57BL/6 mice exposed to hypoxia showed an increase in system Xc- expression, with the highest level of intensity in the hippocampus. Western Blot analysis also showed an almost 2-fold increase in system Xc- protein in hypoxia-exposed versus control mice. The mRNA for the regulatory subunit of system Xc-, xCT, and the xCT/actin ratio were also increased under hypoxic conditions. Experiments using hypoxia-inducible factor (HIF-1α) siRNA showed a statistically significant decrease in HIF-1α and system Xc- expression. Under hypoxic conditions, system Xc- activity, as determined by cystine uptake, increased 2-fold. Importantly, hypoxic preconditioning was attenuated in neural stem cells by pharmacological inhibition of system Xc- activity with S4-carboxyphenylglycine. These data provide the first evidence of hypoxic regulation of the cystine glutamate exchanger system Xc-.
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Affiliation(s)
- Brian Sims
- Department of Pediatrics, University of Alabama at Birmingham, 35294, USA.
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Avtan SM, Kaya M, Orhan N, Arslan A, Arican N, Toklu AS, Gürses C, Elmas I, Kucuk M, Ahishali B. The effects of hyperbaric oxygen therapy on blood–brain barrier permeability in septic rats. Brain Res 2011; 1412:63-72. [DOI: 10.1016/j.brainres.2011.07.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 07/07/2011] [Accepted: 07/07/2011] [Indexed: 01/11/2023]
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Liu W, Khatibi N, Sridharan A, Zhang JH. Application of medical gases in the field of neurobiology. Med Gas Res 2011; 1:13. [PMID: 22146102 PMCID: PMC3231869 DOI: 10.1186/2045-9912-1-13] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 06/27/2011] [Indexed: 12/11/2022] Open
Abstract
Medical gases are pharmaceutical molecules which offer solutions to a wide array of medical needs. This can range from use in burn and stroke victims to hypoxia therapy in children. More specifically however, gases such as oxygen, helium, xenon, and hydrogen have recently come under increased exploration for their potential theraputic use with various brain disease states including hypoxia-ischemia, cerebral hemorrhages, and traumatic brain injuries. As a result, this article will review the various advances in medical gas research and discuss the potential therapeutic applications and mechanisms with regards to the field of neurobiology.
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Affiliation(s)
- Wenwu Liu
- Department of Anesthesiology, Loma Linda Medical Center, Loma Linda, California, USA.
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Westra D, Chen W, Tsuchiyama R, Colohan A, Zhang JH. Pretreatment with normobaric and hyperbaric oxygenation worsens cerebral edema and neurologic outcomes in a murine model of surgically induced brain injury. ACTA NEUROCHIRURGICA. SUPPLEMENT 2011; 111:243-51. [PMID: 21725763 DOI: 10.1007/978-3-7091-0693-8_41] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Hyperbaric oxygenation is a readily available treatment modality, and its ability to improve neurological outcomes in a variety of animal models has been demonstrated. This study was designed to investigate the use of a single pretreatment regimen of either hyperbaric oxygenation or normobaric oxygenation to determine its effects in a murine model of surgically induced brain injury (SBI). MATERIALS AND METHODS Hyperbaric oxygen (2.5ATM, 1 h), normobaric oxygen (100% FIO2, 1 h) or room air (21% FIO2, 1 h) was applied on CD-1 mice immediately, or at 1, 2 or 3 h followed by SBI or sham surgical operation. Neurological assessment of the animals was done by a blinded observer at 24 and 72 h using a 21-point modified Garcia scale, wire hanging test, and beam balance test. The brain edema was evaluated using brain water content at 24 and 72 h after SBI. RESULTS There was no statistically significant difference in the mortality rate after treatment compared with the SBI group. The brain water content after SBI was significantly increased in the right (ipsilateral) frontal lobe surrounding the site of surgical resection compared with the sham group. Both hyperbaric and normobaric oxygen treatment significantly increased the brain edema and worsened the neurological outcomes using a 21-point Garcia score compared with the SBI group. The brain edema at 24 h after injury was most pronounced in the group treated with normobaric oxygenation 2 h prior to surgery. These differences disappeared at 72 h after SBI. CONCLUSION Immediate pretreatment with either hyperbaric (2.5ATM, 1 h) or normobaric oxygen (100% FIO2, 1 h) increased brain edema and worsened neurological function at 24 h following SBI.
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Affiliation(s)
- David Westra
- Department of Neurosurgery, Loma Linda University Medical Center, Loma Linda, CA 92350, USA
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