1
|
Gianni S, Valsecchi C, Berra L. Therapeutic Gases and Inhaled Anesthetics as Adjunctive Therapies in Critically Ill Patients. Semin Respir Crit Care Med 2022; 43:440-452. [PMID: 35533689 DOI: 10.1055/s-0042-1747966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The administration of exogenous oxygen to support adequate gas exchange is the cornerstone of respiratory care. In the past few years, other gaseous molecules have been introduced in clinical practice to treat the wide variety of physiological derangement seen in critical care patients.Inhaled nitric oxide (NO) is used for its unique selective pulmonary vasodilator effect. Recent studies showed that NO plays a pivotal role in regulating ischemia-reperfusion injury and it has antibacterial and antiviral activity.Helium, due to its low density, is used in patients with upper airway obstruction and lower airway obstruction to facilitate gas flow and to reduce work of breathing.Carbon monoxide (CO) is a poisonous gas that acts as a signaling molecule involved in many biologic pathways. CO's anti-inflammatory and antiproliferative effects are under investigation in the setting of acute respiratory distress and idiopathic pulmonary fibrosis.Inhaled anesthetics are widely used in the operative room setting and, with the development of anesthetic reflectors, are now a valid option for sedation management in the intensive care unit.Many other gases such as xenon, argon, and hydrogen sulfide are under investigation for their neuroprotective and cardioprotective effects in post-cardiac arrest syndrome.With all these therapeutic options available, the clinician must have a clear understanding of the physiologic basis, therapeutic potential, and possible adverse events of these therapeutic gases. In this review, we will present the therapeutic gases other than oxygen used in clinical practice and we will describe other promising therapeutic gases that are in the early phases of investigation.
Collapse
Affiliation(s)
- Stefano Gianni
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Carlo Valsecchi
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Lorenzo Berra
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
2
|
Zafonte RD, Wang L, Arbelaez CA, Dennison R, Teng YD. Medical Gas Therapy for Tissue, Organ, and CNS Protection: A Systematic Review of Effects, Mechanisms, and Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104136. [PMID: 35243825 PMCID: PMC9069381 DOI: 10.1002/advs.202104136] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 01/10/2022] [Indexed: 05/13/2023]
Abstract
Gaseous molecules have been increasingly explored for therapeutic development. Here, following an analytical background introduction, a systematic review of medical gas research is presented, focusing on tissue protections, mechanisms, data tangibility, and translational challenges. The pharmacological efficacies of carbon monoxide (CO) and xenon (Xe) are further examined with emphasis on intracellular messengers associated with cytoprotection and functional improvement for the CNS, heart, retina, liver, kidneys, lungs, etc. Overall, the outcome supports the hypothesis that readily deliverable "biological gas" (CO, H2 , H2 S, NO, O2 , O3 , and N2 O) or "noble gas" (He, Ar, and Xe) treatment may preserve cells against common pathologies by regulating oxidative, inflammatory, apoptotic, survival, and/or repair processes. Specifically, CO, in safe dosages, elicits neurorestoration via igniting sGC/cGMP/MAPK signaling and crosstalk between HO-CO, HIF-1α/VEGF, and NOS pathways. Xe rescues neurons through NMDA antagonism and PI3K/Akt/HIF-1α/ERK activation. Primary findings also reveal that the need to utilize cutting-edge molecular and genetic tactics to validate mechanistic targets and optimize outcome consistency remains urgent; the number of neurotherapeutic investigations is limited, without published results from large in vivo models. Lastly, the broad-spectrum, concurrent multimodal homeostatic actions of medical gases may represent a novel pharmaceutical approach to treating critical organ failure and neurotrauma.
Collapse
Affiliation(s)
- Ross D. Zafonte
- Department of Physical Medicine and RehabilitationHarvard Medical SchoolBostonMA02115USA
- Neurotrauma Recovery Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
- Spaulding Research InstituteSpaulding Rehabilitation Hospital NetworkBostonMA02129USA
| | - Lei Wang
- Department of Physical Medicine and RehabilitationHarvard Medical SchoolBostonMA02115USA
- Laboratory of SCI, Stem Cell and Recovery Neurobiology Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
| | - Christian A. Arbelaez
- Department of Physical Medicine and RehabilitationHarvard Medical SchoolBostonMA02115USA
- Laboratory of SCI, Stem Cell and Recovery Neurobiology Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
| | - Rachel Dennison
- Department of Physical Medicine and RehabilitationHarvard Medical SchoolBostonMA02115USA
- Laboratory of SCI, Stem Cell and Recovery Neurobiology Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
| | - Yang D. Teng
- Department of Physical Medicine and RehabilitationHarvard Medical SchoolBostonMA02115USA
- Neurotrauma Recovery Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
- Spaulding Research InstituteSpaulding Rehabilitation Hospital NetworkBostonMA02129USA
- Laboratory of SCI, Stem Cell and Recovery Neurobiology Research, Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital Network, Mass General Brigham, and Harvard Medical SchoolBostonMA02129USA
| |
Collapse
|
3
|
Electroacupuncture attenuates brain injury through α7 nicotinic acetylcholine receptor-mediated suppression of neuroinflammation in a rat model of asphyxial cardiac arrest. J Neuroimmunol 2022; 367:577873. [DOI: 10.1016/j.jneuroim.2022.577873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/09/2022] [Accepted: 04/17/2022] [Indexed: 11/22/2022]
|
4
|
Yang S, Yu C, Yang Z, Cui H, Wu Y, Liang Z, Liu Y, Shi X, Shao F, Zhao S, Tang Z. DL-3-n-butylphthalide-induced neuroprotection in rat models of asphyxia-induced cardiac arrest followed by cardiopulmonary resuscitation. J Cell Physiol 2021; 236:7464-7472. [PMID: 34061993 DOI: 10.1002/jcp.30442] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 12/20/2022]
Abstract
Most patients that resuscitate successfully from cardiac arrest (CA) suffer from poor neurological prognosis. DL-3-n-butylphthalide (NBP) is known to have neuroprotective effects via multiple mechanisms. This study aimed to investigate whether NBP can decrease neurological impairment after CA. We studied the protective role of NBP in the hippocampus of a rat model of cardiac arrest induced by asphyxia. Thirty-nine rats were divided randomly into sham, control, and NBP groups. Rats in control and NBP groups underwent cardiopulmonary resuscitation (CPR) 6 min after asphyxia. NBP or vehicle (saline) was administered intravenously 10 min after the return of spontaneous circulation (ROSC). Ultrastructure of hippocampal neurons was observed under transmission electron microscope. NBP treatment improved neurological function up to 72 h after CA. The ultrastructural lesion in mitochondria recovered in the NBP-treated CA model. In conclusion, our study demonstrated multiple therapeutic benefits of NBP after CA.
Collapse
Affiliation(s)
- Song Yang
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Department of Emergency Medicine, Beijing Huairou Hospital, Beijing, China
| | - Changxiao Yu
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Zhengfei Yang
- Department of Emergency Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hao Cui
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yang Wu
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Zhen Liang
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Ying Liu
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xian Shi
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Department of Emergency Medicine, Beijing Huairou Hospital, Beijing, China
| | - Fei Shao
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Shen Zhao
- Department of Emergency Medicine, Fujian Provincial Hospital, Fujian Institute of Emergency Medicine, Fujian Medical University, Fuzhou, China
| | - Ziren Tang
- Department of Emergency Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chaoyang Hospital, Beijing, China
| |
Collapse
|
5
|
Ou X, Xia T, Yang C, Yu C, Zhang S, Huang R, Chen C, Zhou C. Novel H 2S donor proglumide-ADT-OH protects HUVECs from ox-LDL-induced injury through NF-κB and JAK/SATA pathway. Open Med (Wars) 2021; 16:1318-1327. [PMID: 34568579 PMCID: PMC8428624 DOI: 10.1515/med-2021-0287] [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: 11/25/2020] [Revised: 03/03/2021] [Accepted: 04/20/2021] [Indexed: 11/23/2022] Open
Abstract
As a gaseous mediator, hydrogen sulfide (H2S) has many physiological effects and pathological effects in atherosclerosis. In recent years, many exogenous H2S donors have been synthesized to study atherosclerosis diseases. In this study, proglumide-(5-(4-hydroxyphenyl)-3H-1,2-dithiole-3-thione) (P-A) was synthesized as a H2S donor. The protective effect and mechanism of P-A on HUVEC that was injured by ox-LDL were detected. The HUEVCs were affected by 100 μmol/L P-A for 24 h; the release of H2S was the largest. After 100 μmol/L P-A acted on HUVEC damage model for 12 h, the cell proliferation activity was the best. The results showed that P-A can downregulate the expression of p-NF-кBp65 protein and reduce the amount of TNF-α and IL-6 and promote the formation of IL-10 by inhibiting the NF-кB pathway, and also induce the expression of superoxide dismutase (SOD) to protect HUVEC from ox-LDL injury. P-A can also regulate JAK/STAT pathway to reduce the expression of p-JAK2 protein and reduce the production of IL-6 and TNF-α. P-A has protective effect on HUVEC injured by ox-LDL, and the protective mechanism is related to the regulation of JAK/STAT pathway and NF-кB pathway.
Collapse
Affiliation(s)
- Xuelan Ou
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Tianqin Xia
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Chunyan Yang
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Chunlei Yu
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Shipeng Zhang
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Rong Huang
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Chuan Chen
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| | - Chunyang Zhou
- Institute of Materia Medica, School of Pharmacy, North Sichuan Medical College, Nanchong 637100, Sichuan, China
| |
Collapse
|
6
|
Hydrogen Sulfide Reduces Ischemia and Reperfusion Injury in Neuronal Cells in a Dose- and Time-Dependent Manner. Int J Mol Sci 2021; 22:ijms221810099. [PMID: 34576259 PMCID: PMC8467989 DOI: 10.3390/ijms221810099] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/13/2021] [Accepted: 09/16/2021] [Indexed: 12/13/2022] Open
Abstract
Background: The ischemia-reperfusion injury (IRI) of neuronal tissue, such as the brain and retina, leads to possible cell death and loss of function. Current treatment options are limited, but preliminary observations suggest a protective effect of hydrogen sulfide (H2S). However, the dosage, timing, and mechanism of inhaled H2S treatment after IRI requires further exploration. Methods: We investigated possible neuroprotective effects of inhaled H2S by inducing retinal ischemia–reperfusion injury in rats for the duration of 1 h (120 mmHg), followed by the administration of hydrogen sulfide (H2S) for 1 h at different time points (0, 1.5, and 3 h after the initiation of reperfusion) and at different H2S concentrations (120, 80, and 40 ppm). We quantified the H2S effect by conducting retinal ganglion cell counts in fluorogold-labeled animals 7 days after IRI. The retinal tissue was harvested after 24 h for molecular analysis, including qPCR and Western blotting. Apoptotic and inflammatory mediators, transcription factors, and markers for oxidative stress were investigated. Histological analyses of the retina and the detection of inflammatory cytokines in serum assays were also performed. Results: The effects of inhaled H2S were most evident at a concentration of 80 ppm administered 1.5 h after IRI. H2S treatment increased the expression of anti-apoptotic Bcl-2, decreased pro-apoptotic Bax expression, reduced the release of the inflammatory cytokines IL-1β and TNF-α, attenuated NF-κB p65, and enhanced Akt phosphorylation. H2S also downregulated NOX4 and cystathionine β-synthase. Histological analyses illustrated a reduction in TNF-α in retinal ganglion cells and lower serum levels of TNF-α in H2S-treated animals after IRI. Conclusion: After neuronal IRI, H2S mediates neuroprotection in a time- and dose-dependent manner. The H2S treatment modulated transcription factor NF-κB activation and reduced retinal inflammation.
Collapse
|
7
|
Li G, LeiQian, Gu P, Fan D. Dexmedetomidine post-conditioning attenuates cerebral ischemia following asphyxia cardiac arrest through down-regulation of apoptosis and neuroinflammation in rats. BMC Anesthesiol 2021; 21:180. [PMID: 34182937 PMCID: PMC8236741 DOI: 10.1186/s12871-021-01394-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 06/10/2021] [Indexed: 12/17/2022] Open
Abstract
Background Neuroprotection strategies after cardiac arrest (CA)/cardiopulmonary resuscitation (CPR) remain key areas of basic and clinical research. This study was designed to investigate the neuroprotective effects of dexmedetomidine following resuscitation and potential mechanisms. Methods Anesthetized rats underwent 6-min asphyxia-based cardiac arrest and resuscitation, after which the experimental group received a single intravenous dose of dexmedetomidine (25 μg/kg). Neurological outcomes and ataxia were assessed after the return of spontaneous circulation. The serum levels and brain expression of inflammation markers was examined, and apoptotic cells were quantified by TUNEL staining. Results Neuroprotection was enhanced by dexmedetomidine post-conditioning after the return of spontaneous circulation. This enhancement was characterized by the promotion of neurological function scores and coordination. In addition, dexmedetomidine post-conditioning attenuated the serum levels of the pro-inflammatory cytokine tumor necrosis factor (TNF)-α at 2 h, as well as interleukin IL-1β at 2, 24, and 48 h. TUNEL staining showed that the number of apoptotic cells in the dexmedetomidine post-conditioning group was significantly reduced compared with the control group. Further western blot analysis indicated that dexmedetomidine markedly reduced the levels of caspase-3 and nuclear factor-kappa B (NF-κB) in the brain. Conclusions Dexmedetomidine post-conditioning had a neuroprotective effect against cerebral injury following asphyxia-induced cardiac arrest. The mechanism was associated with the downregulation of apoptosis and neuroinflammation.
Collapse
Affiliation(s)
- Guangqian Li
- School of Medicine, Universityof Electronic Science and Technology of China, Chengdu, China
| | - LeiQian
- School of Medicine, Universityof Electronic Science and Technology of China, Chengdu, China
| | - Pan Gu
- School of Medicine, Universityof Electronic Science and Technology of China, Chengdu, China
| | - Dan Fan
- School of Medicine, Universityof Electronic Science and Technology of China, Chengdu, China. .,Department of Anesthesiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, No. 32 West Second Section, First RingRoad, Chengdu, 610072, Sichuan, China.
| |
Collapse
|
8
|
Wang YZ, Ngowi EE, Wang D, Qi HW, Jing MR, Zhang YX, Cai CB, He QL, Khattak S, Khan NH, Jiang QY, Ji XY, Wu DD. The Potential of Hydrogen Sulfide Donors in Treating Cardiovascular Diseases. Int J Mol Sci 2021; 22:2194. [PMID: 33672103 PMCID: PMC7927090 DOI: 10.3390/ijms22042194] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/05/2021] [Accepted: 02/10/2021] [Indexed: 02/08/2023] Open
Abstract
Hydrogen sulfide (H2S) has long been considered as a toxic gas, but as research progressed, the idea has been updated and it has now been shown to have potent protective effects at reasonable concentrations. H2S is an endogenous gas signaling molecule in mammals and is produced by specific enzymes in different cell types. An increasing number of studies indicate that H2S plays an important role in cardiovascular homeostasis, and in most cases, H2S has been reported to be downregulated in cardiovascular diseases (CVDs). Similarly, in preclinical studies, H2S has been shown to prevent CVDs and improve heart function after heart failure. Recently, many H2S donors have been synthesized and tested in cellular and animal models. Moreover, numerous molecular mechanisms have been proposed to demonstrate the effects of these donors. In this review, we will provide an update on the role of H2S in cardiovascular activities and its involvement in pathological states, with a special focus on the roles of exogenous H2S in cardiac protection.
Collapse
Affiliation(s)
- Yi-Zhen Wang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Ebenezeri Erasto Ngowi
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- Department of Biological Sciences, Faculty of Science, Dar es Salaam University College of Education, Dar es Salaam 2329, Tanzania
| | - Di Wang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Hui-Wen Qi
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Mi-Rong Jing
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Yan-Xia Zhang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Chun-Bo Cai
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Qing-Lin He
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- School of Nursing and Health, Henan University, Kaifeng 475004, China
| | - Saadullah Khattak
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- Kaifeng Municipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng 475004, China
- School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Nazeer Hussain Khan
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- Kaifeng Municipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng 475004, China
- School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Qi-Ying Jiang
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
| | - Xin-Ying Ji
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- Kaifeng Key Laboratory of Infection and Biological Safety, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Dong-Dong Wu
- Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China; (Y.-Z.W.); (E.E.N.); (D.W.); (H.-W.Q.); (M.-R.J.); (Y.-X.Z.); (C.-B.C.); (Q.-L.H.); (S.K.); (N.H.K.)
- School of Stomatology, Henan University, Kaifeng 475004, China
| |
Collapse
|
9
|
Kumar M, Sandhir R. Hydrogen sulfide attenuates hyperhomocysteinemia-induced blood-brain barrier permeability by inhibiting MMP-9. Int J Neurosci 2021; 132:1061-1071. [PMID: 33287606 DOI: 10.1080/00207454.2020.1860967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Backgroud: Hyperhomocysteinemia (HHcy) is implicated in various neurovascular disorders including vascular dementia, subarachnoid hemorrhage and stroke. Elevated homocysteine (Hcy) levels are associated with increased oxidative stress and compromised blood-brain barrier (BBB) integrity. Hydrogen sulfide (H2S) has recently emerged as potent neuroprotective molecule in various neurological conditions including those associated with HHcy. The present study evaluates the protective effect of sodium hydrogen sulfide (NaHS; a source of H2S) on HHcy-induced BBB dysfunction and underpin molecular mechanisms.Materials and methods: Supplementation of NaHS restored the increased BBB permeability in the cortex and hippocampus of HHcy animals assessed in terms of diffused sodium fluorescein and Evans blue tracer dyes in the brain. Activity of matrix metalloproteinases (MMPs) assessed by gelatinase activity and in situ gelatinase assay was restored to the normal in the cortex and hippocampus of HHcy animals supplemented with NaHS.Results: Application of gelatin zymography revealed that specifically MMP-9 activity was increased in the cortex and hippocampus of HHcy animals, which was inhibited by NaHS supplementation. Real-time RT-PCR analysis showed that NaHS administration also decreased mRNA expression of MMP-9 in the hippocampus of HHcy animals. NaHS supplementation was further observed to reduce water retention in the brain regions of Hcy treated animals.Conclusion: Taken together, these findings suggest that NaHS supplementation ameliorates HHcy-induced BBB permeability and brain edema by inhibiting the mRNA expression and activity of MMP-9. Therefore, H2S and H2S releasing drugs may be used as a novel therapeutic approach to treat HHcy-associated neurovascular disorders.
Collapse
Affiliation(s)
- Mohit Kumar
- Department of Biochemistry, Basic Medical Science Block-II, Panjab University, Chandigarh, India.,College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Rajat Sandhir
- Department of Biochemistry, Basic Medical Science Block-II, Panjab University, Chandigarh, India
| |
Collapse
|
10
|
Patel JK, Sinha N, Hou W, Shah R, Qadeer A, Tran L, Parikh PB, Parnia S. Association of post-resuscitation inflammatory response with favorable neurologic outcomes in adults with in-hospital cardiac arrest. Resuscitation 2020; 159:54-59. [PMID: 33385467 DOI: 10.1016/j.resuscitation.2020.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 11/19/2020] [Accepted: 12/03/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Early prediction of mortality in adults after in-hospital cardiac arrest (IHCA) remains vital to optimizing treatment strategies. Inflammatory cytokines specific to early prognostication in this population have not been well studied. We evaluated whether novel inflammatory cytokines obtained from adults with IHCA helped predict favorable neurologic outcome. METHODS The study population included adults with IHCA who underwent ACLS-guided resuscitation between March 2014 and May 2019 at an academic tertiary medical center. Peripheral blood samples were obtained within 6, 24, 48, 72, and 96 h of IHCA and analysis of 15 cytokines were performed. The primary outcome of interest was presence of favorable neurologic outcome at hospital discharge, defined as a Glasgow Outcome Score of 4 or 5. RESULTS Of the 105 adults with IHCA studied, 27 (25.7%) were noted to have survival with a favorable neurologic outcome while 78 (74.3%) did not. Patients who survived with favorable neurologic outcome were more often men (88.9% vs 61.5%, p = 0.008) and had higher rates of ventricular tachyarrhythmias as their initial rhythm (34.6% vs 11.7%, p = 0.018). Levels of interleukin (IL)-6, IL-8, IL-10, and Tumor Necrosis Factor (TNF)-R1 within 6 or 24 h were significantly lower in patients with favorable neurologic outcome compared with those who had unfavorable neurologic outcome. In multivariable analysis, IL-10 levels within 6 h was the only independent predictor of favorable neurologic outcomes [odds ratio (OR) 0.895, 95% confidence interval 0.805-0.996, p = 0.041]. CONCLUSION In this contemporary observational study of adults with IHCA receiving ACLS-guided resuscitative and post-resuscitative care, inflammatory cytokines specific to early prognostication in adults with IHCA exist. Further larger scale studies examining the association of these inflammatory cytokines with prognosis are warranted.
Collapse
Affiliation(s)
- Jignesh K Patel
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA.
| | - Niraj Sinha
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Wei Hou
- Division of Epidemiology and Biostatistics, Department of Family, Population, and Preventive Medicine, Stony Brook University Renaissance School of Medicine, Stony Brook, NY, USA
| | - Rian Shah
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Asem Qadeer
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Linh Tran
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Puja B Parikh
- Division of Cardiology, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Sam Parnia
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University Medical Center, New York, NY, USA
| |
Collapse
|
11
|
Alshami A, Einav S, Skrifvars MB, Varon J. Administration of inhaled noble and other gases after cardiopulmonary resuscitation: A systematic review. Am J Emerg Med 2020; 38:2179-2184. [PMID: 33071073 DOI: 10.1016/j.ajem.2020.06.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/18/2020] [Accepted: 06/20/2020] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Inhalation of noble and other gases after cardiac arrest (CA) might improve neurological and cardiac outcomes. This article discusses up-to-date information on this novel therapeutic intervention. DATA SOURCES CENTRAL, MEDLINE, online published abstracts from conference proceedings, clinical trial registry clinicaltrials.gov, and reference lists of relevant papers were systematically searched from January 1960 till March 2019. STUDY SELECTION Preclinical and clinical studies, irrespective of their types or described outcomes, were included. DATA EXTRACTION Abstract screening, study selection, and data extraction were performed by two independent authors. Due to the paucity of human trials, risk of bias assessment was not performed DATA SYNTHESIS: After screening 281 interventional studies, we included an overall of 27. Only, xenon, helium, hydrogen, and nitric oxide have been or are being studied on humans. Xenon, nitric oxide, and hydrogen show both neuroprotective and cardiotonic features, while argon and hydrogen sulfide seem neuroprotective, but not cardiotonic. Most gases have elicited neurohistological protection in preclinical studies; however, only hydrogen and hydrogen sulfide appeared to preserve CA1 sector of hippocampus, the most vulnerable area in the brain for hypoxia. CONCLUSION Inhalation of certain gases after CPR appears promising in mitigating neurological and cardiac damage and may become the next successful neuroprotective and cardiotonic interventions.
Collapse
Affiliation(s)
- Abbas Alshami
- Jersey Shore University Medical Center, Neptune, NJ, USA; Dorrington Medical Associates, PA, Houston, TX, USA
| | - Sharon Einav
- Intensive Care Unit of the Share Zedek Medical Center and Faculty of Medicine of the Hebrew University, Jerusalem, Israel
| | - Markus B Skrifvars
- Department of Emergency Care and Services, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Joseph Varon
- The University of Texas Health Science Center at Houston, USA; University of Texas Medical Branch at Galveston, USA; United Memorial Medical Center/United General Hospital, Houston, TX, USA.
| |
Collapse
|
12
|
Sun H, Ding H, Shi Y, Li C, Jin H, Yang X, Chen Z, Tian P, Zhu J, Sun H. Exogenous Hydrogen Sulfide Within the Nucleus Ambiguus Inhibits Gastrointestinal Motility in Rats. Front Physiol 2020; 11:545184. [PMID: 33013478 PMCID: PMC7516268 DOI: 10.3389/fphys.2020.545184] [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: 03/24/2020] [Accepted: 08/21/2020] [Indexed: 11/13/2022] Open
Abstract
Hydrogen sulfide (H2S) is a neuromodulator in the central nervous system. However, the physiological role of H2S in the nucleus ambiguus (NA) has rarely been reported. This research aimed to elucidate the role of H2S in the regulation of gastrointestinal motility in rats. Male Wistar rats were randomly assigned to sodium hydrosulfide (NaHS; 4 and 8 nmol) groups, physiological saline (PS) group, capsazepine (10 pmol) + NaHS (4 nmol) group, L703606 (4 nmol) + NaHS (4 nmol) group, and pyrrolidine dithiocarbamate (PDTC, 4 nmol) + NaHS (4 nmol) group. Gastrointestinal motility curves before and after the injection were recorded using a latex balloon attached with a pressure transducer, which was introduced into the pylorus through gastric fundus. The results demonstrated that NaHS (4 and 8 nmol), an exogenous H2S donor, remarkably suppressed gastrointestinal motility in the NA of rats (P < 0.01). The suppressive effect of NaHS on gastrointestinal motility could be prevented by capsazepine, a transient receptor potential vanilloid 1 (TRPV1) antagonist, and PDTC, a NF-κB inhibitor. However, the same amount of PS did not induce significant changes in gastrointestinal motility (P > 0.05). Our findings indicate that NaHS within the NA can remarkably suppress gastrointestinal motility in rats, possibly through TRPV1 channels and NF-κB-dependent mechanism.
Collapse
Affiliation(s)
- Hongzhao Sun
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Haikun Ding
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Yuan Shi
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Chenyu Li
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Haoran Jin
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Xiaoyue Yang
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Zhaosong Chen
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Pengpeng Tian
- School of Life Sciences, Qilu Normal University, Jinan, China
| | - Jianping Zhu
- Key Laboratory of Animal Resistance, School of Life Sciences, Shandong Normal University, Jinan, China
| | - Haiji Sun
- Key Laboratory of Animal Resistance, School of Life Sciences, Shandong Normal University, Jinan, China
| |
Collapse
|
13
|
Mai N, Prifti V, Lim K, O'Reilly MA, Kim M, Halterman MW. Lung SOD3 limits neurovascular reperfusion injury and systemic immune activation following transient global cerebral ischemia. J Stroke Cerebrovasc Dis 2020; 29:104942. [PMID: 32807413 DOI: 10.1016/j.jstrokecerebrovasdis.2020.104942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/21/2020] [Accepted: 05/05/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Studies implicate the lung in moderating systemic immune activation via effects on circulating leukocytes. In this study, we investigated whether targeted expression of the antioxidant extracellular superoxide dismutase (SOD3) within the lung would influence post-ischemic peripheral neutrophil activation and CNS reperfusion injury. METHODS Adult, male mice expressing human SOD3 within type II pneumocytes were subjected to 15 min of transient global cerebral ischemia. Three days post-reperfusion, lung and brain tissue was collected and analyzed by immunohistochemistry for inflammation and injury markers. In vitro motility and neurotoxicity assays were conducted to ascertain the direct effects of hSOD3 on PMN activation. Results were compared against C57BL/6 age and sex-matched controls. RESULTS Relative to wild-type controls, hSOD3 heterozygous mice exhibited a reduction in lung inflammation, blood-brain barrier damage, and post-ischemic neuronal injury within the hippocampus and cortex. PMNs harvested from hSOD3 mice were also resistant to LPS priming, slower-moving, and less toxic to primary neuronal cultures. CONCLUSIONS Constitutive, focal expression of hSOD3 is neuroprotective in a model of global cerebral ischemia-reperfusion injury. The underlying mechanism of SOD3-dependent protection is attributable in part to effects on the activation state and toxic potential of circulating neutrophils. These results implicate lung-brain coupling as a determinant of cerebral ischemia-reperfusion injury and highlight post-stroke lung inflammation as a potential therapeutic target in acute ischemic cerebrovascular injuries.
Collapse
Affiliation(s)
- Nguyen Mai
- Neuroscience, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States
| | - Viollandi Prifti
- Neuroscience, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States
| | - Kihong Lim
- Microbiology & Immunology, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States
| | - Michael A O'Reilly
- Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States
| | - Minsoo Kim
- Microbiology & Immunology, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States
| | - Marc W Halterman
- Departments of Neurology & Neuroscience, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642 United States; Departments of Neurology, University of Rochester School of Medicine and Dentistry, Rochester NY 14642 United States.
| |
Collapse
|
14
|
Lee SY, Cho SS, Li Y, Bae CS, Park KM, Park DH. Anti-inflammatory Effect of Curcuma longa and Allium hookeri Co-treatment via NF-κB and COX-2 Pathways. Sci Rep 2020; 10:5718. [PMID: 32235914 PMCID: PMC7109078 DOI: 10.1038/s41598-020-62749-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/19/2020] [Indexed: 01/06/2023] Open
Abstract
Although inflammation is a host defense mechanism, chronic inflammation mediates several diseases, including cancer, allergy, asthma, and autoimmune diseases, and reportedly, it is associated with a 60% mortality rate. There are several reports on the anti-inflammatory effects of Curcuma longa and Allium hookeri. However, although they can be used as culinary materials and have biological effects, they are not effective anti-inflammatory agents. In this study, we evaluated the synergic effect of C. longa and A. hookeri in order to confirm the possibility of a new anti-inflammatory agent. Based on cell viability and cytokine analyses, the appropriate ratio of C. longa and A. hookeri was confirmed using an air pouch animal model. Then, the anti-inflammatory effect of C. longa and A. hookeri co-treatment was evaluated by measuring the immune cell count and cytokines in the exudate and by comparing the morphological changes and cytokines in inflamed skin samples. Additionally, we evaluated the NF-κB/COX-2 pathway and iNOS levels. The active constituents detected in C. longa were demethoxycurcumin and bisdemethoxycurcumin, and that detected in A. hookeri was methylsulfonylmethane. An in vitro assessment determined the appropriate drug ratio as 3:7. In a carrageenan-induced inflammatory model, co-treatment effectively suppressed inflammatory cytokines, including IFN-γ, IL-1β, IL-6, IL-13, and IL-17, and recovered inflammation-related morphological changes in the skin. The anti-inflammatory effect of the co-treatment was mediated through the NF-κB/COX-2 pathway and iNOS inhibition. We concluded that co-treatment with C. longa and A. hookeri synergistically inhibited inflammation via the NF-κB/COX-2/iNOS pathway.
Collapse
Affiliation(s)
- Soon-Young Lee
- Department of Korean Medicine, Dongshin University, Naju, 58245, Korea
| | - Seung-Sik Cho
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan Jeonnam, 58579, Korea
| | - YongChun Li
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou, Henan, 450001, P.R. China
| | - Chun-Sik Bae
- College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Korea
| | - Kyung Mok Park
- Department of Korean Medicine, Dongshin University, Naju, 58245, Korea.
| | - Dae-Hun Park
- Department of Korean Medicine, Dongshin University, Naju, 58245, Korea.
| |
Collapse
|
15
|
Li W, Shen X, Wang Y, Zhang J. The effect of Shengpuhuang-tang on retinal inflammation in streptozotocin-induced diabetic rats by NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2020; 247:112275. [PMID: 31589966 DOI: 10.1016/j.jep.2019.112275] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 09/28/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Diabetic retinopathy (DR) is a terrible microvascular disorder causing blindness. Retinal inflammation is the early stage in DR, which is believed to play a crucial role in the development of it. Shengpuhuang-tang (ST), a traditional herbal formula, which has effective treatment of fundus bleeding disorder. ST exerts protective effects against DR in rats, but its underlying mechanism of this efficacy remains unknown. Thus, the objective of this study is to examine the mechanism and the efficacy of ST on retinal inflammation in streptozotocin-induced diabetic rats. MATERIALS AND METHODS The administration of ST was initiated at 4 weeks after diabetes induction and continued for 12 weeks. Retinal vessel permeability was evaluated by using FITC-dextran and Evans blue. Retinal leukostasis was evaluated with FITC-coupled concanavalin A lectin (ConA). Moreover, western blotting was performed to detect TNF-α, ICAM-1 and the relative expression levels of IκBα, IKKβ, and p65 in vivo. RESULTS The results showed that the retinal inflammation in streptozotocin-induced diabetic rats was significantly decreased by ST. ST could decreased the expression levels of TNF-α, ICAM-1 and inhibited the expression of p-IKKβ, p-p65 and IκBα. It could also inhibited the nuclear transfer of p65. CONCLUSIONS In conclusion, these data suggested that ST may have potential treatment strategies against early stage of diabetic retinopathy through NF-κB pathway.
Collapse
Affiliation(s)
- Wencan Li
- Pharmacy Department of Xiangtan Central Hospital, Xiangtan, Hunan 411100, China
| | - Xiaohui Shen
- Pharmacy Department of Xiangtan Central Hospital, Xiangtan, Hunan 411100, China
| | - Yanping Wang
- Pharmacy Department of Xiangtan Central Hospital, Xiangtan, Hunan 411100, China
| | - Jiani Zhang
- Pharmacy Department of Xiangtan Central Hospital, Xiangtan, Hunan 411100, China.
| |
Collapse
|
16
|
Yong Y, Guo J, Zheng D, Li Y, Chen W, Wang J, Chen W, Wang K, Wang Y. Electroacupuncture pretreatment attenuates brain injury in a mouse model of cardiac arrest and cardiopulmonary resuscitation via the AKT/eNOS pathway. Life Sci 2019; 235:116821. [PMID: 31476306 DOI: 10.1016/j.lfs.2019.116821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/16/2019] [Accepted: 08/29/2019] [Indexed: 02/07/2023]
Abstract
AIMS This study aims to examine the effects of electroacupuncture (EA) pretreatment on brain injury after cardiac arrest and cardiopulmonary resuscitation (CA/CPR) and its underlying mechanisms. MATERIALS AND METHODS Adult male C57BL/6 mice were subjected to 6 min of cardiac arrest induced with a potassium chloride infusion and resuscitated by chest compressions and an epinephrine infusion. During the 3 days prior to CA/CRP, mice received EA pretreatment (1 mA, 2 Hz; daily session of 30 min) at the Baihui acupoint (GV20) once daily. Stimulation at a nonacupoint served as a control. In mechanistic studies, mice received the AKT inhibitor LY294002 or endothelial nitric oxide synthase (eNOS) inhibitor L-NIO 30 min before EA pretreatment. A neurological assessment was conducted 24 h after CA/CRP, followed by animal sacrifice and evaluation of physiological brain damage. KEY FINDINGS CA/CPR resulted in severe brain injury as evidenced by neurological deficits and increased neuronal apoptosis, oxidative stress and the proinflammatory cytokines TNF-α and IL-6. EA pretreatment at the GV20 acupoint but not at a nonacupoint attenuated the neurological deficits and the pathological changes induced by CA/CPR. LY294002 or L-NIO eliminated the neuroprotective effects of the EA pretreatment. SIGNIFICANCE This study showed that EA pretreatment at the GV20 acupoint can protect the brain from damage associated with globalized ischemia followed by reperfusion and that these protective effects occur via the AKT/eNOS signaling pathway.
Collapse
Affiliation(s)
- Yue Yong
- Department of Anesthesiology & Research Institute for Acupuncture Anesthesia, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jun Guo
- Department of Anesthesiology & Research Institute for Acupuncture Anesthesia, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Dongyu Zheng
- Department of Anesthesiology, Changzheng Hospital Second Military Medical University, Shanghai, China
| | - Yonghua Li
- Department of Anesthesiology, Changzheng Hospital Second Military Medical University, Shanghai, China
| | - Wei Chen
- Department of Anesthesiology, Changzheng Hospital Second Military Medical University, Shanghai, China
| | - Jian Wang
- Department of Anesthesiology & Research Institute for Acupuncture Anesthesia, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wenting Chen
- Department of Anesthesiology & Research Institute for Acupuncture Anesthesia, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ke Wang
- Institute of Clinical Immunology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Yongqiang Wang
- Department of Anesthesiology & Research Institute for Acupuncture Anesthesia, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| |
Collapse
|
17
|
Cheng XJ, Gu JX, Pang YP, Liu J, Xu T, Li XR, Hua YZ, Newell KA, Huang XF, Yu Y, Liu Y. Tacrine-Hydrogen Sulfide Donor Hybrid Ameliorates Cognitive Impairment in the Aluminum Chloride Mouse Model of Alzheimer's Disease. ACS Chem Neurosci 2019; 10:3500-3509. [PMID: 31244052 DOI: 10.1021/acschemneuro.9b00120] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder, characterized by progressive loss of memory and cognitive function, and is associated with the deficiency of synaptic acetylcholine, as well as chronic neuroinflmmation. Tacrine, a potent acetylcholinesterase (AChE) inhibitor, was previously a prescribed clinical therapeutic agent for AD, but it was recently withdrawn because it caused widespread hepatotoxicity. Hydrogen sulfide (H2S) has neuroprotective, hepatoprotective, and anti-inflammatory effects. In this study, we synthesized a new compound, a tacrine-H2S donor hybrid (THS) by introducing H2S-releasing moieties (ACS81) to tacrine. Subsequently, pharmacological and biological evaluations of THS were conducted in the aluminum trichloride (AlCl3)-induced AD mice model. We found that THS (15 mmol/kg) improved cognitive and locomotor activity in AD mice in the step-through test and open field test, respectively. THS showed strong AChE inhibitory activity in the serum and hippocampus of AD mice and induced increased hippocampal H2S levels. Furthermore, THS reduced mRNA expression of the proinflammatory cytokines, TNF-α, IL-6, and IL-1β and increased synapse-associated proteins (synaptophysin and postsynaptic density protein 95) in the hippocampus of AD mice. Importantly, THS, unlike tacrine, did not increase liver transaminases (alanine transaminase and aspartate transaminase) or proinflammatory cytokines, indicating THS is much safer than tacrine. Therefore, the multifunctional effects of this new hybrid compound of tacrine and H2S indicate it is a promising compound for further research into the treatment of AD.
Collapse
Affiliation(s)
- Xiao-jing Cheng
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Jing-xue Gu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Yi-peng Pang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Jiao Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Ting Xu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Xin-rui Li
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Yu-zhou Hua
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Kelly A. Newell
- Illawarra Health and Medical Research Institute and Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Xu-Feng Huang
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
- Illawarra Health and Medical Research Institute and Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Yinghua Yu
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
- Illawarra Health and Medical Research Institute and Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Yi Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| |
Collapse
|
18
|
Wu D, Zhong P, Wang J, Wang H. Exogenous hydrogen sulfide mitigates LPS + ATP-induced inflammation by inhibiting NLRP3 inflammasome activation and promoting autophagy in L02 cells. Mol Cell Biochem 2019; 457:145-156. [PMID: 30877511 DOI: 10.1007/s11010-019-03519-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 03/09/2019] [Indexed: 12/19/2022]
Abstract
The aim of this study is to investigate whether exogenous hydrogen sulfide (H2S) could mitigate lipopolysaccharide (LPS) + Adenosine Triphosphate (ATP)-induced inflammation by inhibiting nucleotide-binding oligomerization domain-like receptor 3 (NLRP3) inflammasome activation and promoting autophagy in L02 cells. We stimulated L02 cells with different concentrations of LPS, then the cell viability, cell apoptosis, and the protein level of NLRP3 inflammasome were detected by MTT and western blot to determine the appropriate LPS concentration used in this study. The cells were divided into 4 group: the cells in control group were cultured with RPMI-1640 for 23.5 h; the cells in LPS + ATP group were cultured with RPMI-1640 for 0.5 h, then were stimulated with 100 ng/ml LPS for 18 h followed by stimulation with 5 mM ATP for 5 h; the cells in Sodium hydrosulfide (NaHS) + LPS + ATP group were pretreated with NaHS for 0.5 h before exposure to LPS for 18 h and ATP for 5 h; the cells in NaHS group were treated with NaHS for 0.5 h, then were cultured with RPMI-1640 for 23 h. Subsequently, the cells in each group were collected, the protein levels of NLRP3, pro-caspase-1, cleaved caspase-1, P62, toll-like receptor 4 (TLR4), nuclear factor-kappa B (NF-κB), LC3, Beclin-1, and interleukin (IL)-1 beta (β) were detected by western blot and enzyme-linked immunosorbent assay. Our results showed that exogenous H2S reduced the protein levels of NLRP3, cleaved caspase-1, TLR4, NF-κB, P62, and IL-1β induced by LPS + ATP and increased the ratio of LC3-II/I and the protein levels of Beclin 1 suppressed by LPS + ATP. This study demonstrated that H2S might suppress LPS + ATP-induced inflammation by inhibiting NLRP3 inflammasome and promoting autophagy. In conclusion, H2S might have potential applications in the treatment of aseptic hepatitis.
Collapse
Affiliation(s)
- Dongdong Wu
- School of Basic Medical Science, Henan University, Kaifeng, 475004, Henan, China
| | - Peiyu Zhong
- School of Basic Medical Science, Henan University, Kaifeng, 475004, Henan, China
| | - Jun Wang
- School of Basic Medical Science, Henan University, Kaifeng, 475004, Henan, China
| | - Honggang Wang
- School of Basic Medical Science, Henan University, Kaifeng, 475004, Henan, China.
| |
Collapse
|
19
|
Jou C, Shah R, Figueroa A, Patel JK. The Role of Inflammatory Cytokines in Cardiac Arrest. J Intensive Care Med 2018; 35:219-224. [DOI: 10.1177/0885066618817518] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Introduction: Post-cardiac arrest syndrome (PCAS) is characterized by systemic ischemia/reperfusion injury, anoxic brain injury, and post-arrest myocardial dysfunction superimposed on a precipitating pathology. The role of inflammatory cytokines in cardiac arrest remains unclear. Aims: We aimed to describe, with an emphasis on clinical applications, what is known about the role of inflammatory cytokines in cardiac arrest. Data Sources: A PubMed literature review was performed for relevant articles. Only articles in English that studied cytokines in patients with cardiac arrest were included. Results: Cytokines play a crucial role in the pathogenesis of PCAS. Following cardiac arrest, the large release of circulating cytokines mediates the ischemia/reperfusion injury, brain dysfunction, and myocardial dysfunction seen. Interleukins, tumor necrosis factor, and matrix metalloproteinases all play a unique prognostic role in PCAS. High levels of inflammatory cytokines have been associated with mortality and/or poor neurologic outcomes. Interventions to modify the systemic inflammation seen in PCAS continue to be heavily studied. Currently, the only approved medical intervention for comatose patients following cardiac arrest is targeted temperature management. Medical agents, including minocycline and sodium sulfide, have demonstrated promise in animal models. Conclusions: The role of inflammatory cytokines for both short- and long-term outcomes is an important area for future investigation.
Collapse
Affiliation(s)
- Christopher Jou
- Resuscitation Research Group, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Rian Shah
- Resuscitation Research Group, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Andrew Figueroa
- Resuscitation Research Group, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Jignesh K. Patel
- Resuscitation Research Group, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Stony Brook University Medical Center, Stony Brook, NY, USA
| |
Collapse
|
20
|
Abstract
Hydrogen sulfide (H2S) is a novel signaling molecule most recently found to be of fundamental importance in cellular function as a regulator of apoptosis, inflammation, and perfusion. Mechanisms of endogenous H2S signaling are poorly understood; however, signal transmission is thought to occur via persulfidation at reactive cysteine residues on proteins. Although much has been discovered about how H2S is synthesized in the body, less is known about how it is metabolized. Recent studies have discovered a multitude of different targets for H2S therapy, including those related to protein modification, intracellular signaling, and ion channel depolarization. The most difficult part of studying hydrogen sulfide has been finding a way to accurately and reproducibly measure it. The purpose of this review is to: elaborate on the biosynthesis and catabolism of H2S in the human body, review current knowledge of the mechanisms of action of this gas in relation to ischemic injury, define strategies for physiological measurement of H2S in biological systems, and review potential novel therapies that use H2S for treatment.
Collapse
|
21
|
Liu R, Liao X, Li X, Wei H, Liang Q, Zhang Z, Yin M, Zeng X, Liang Z, Hu C. Expression profiles of long noncoding RNAs and mRNAs in post-cardiac arrest rat brains. Mol Med Rep 2018; 17:6413-6424. [PMID: 29512756 PMCID: PMC5928618 DOI: 10.3892/mmr.2018.8703] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 03/01/2018] [Indexed: 01/17/2023] Open
Abstract
To investigate long noncoding (lnc)-RNA and mRNA expression profiles in post-cardiac arrest (CA) brains, an external transthoracic electrical current was applied for 8 min to induce CA (the CA group). A total of 4 rats received sham-operations and served as the blank control (BC) group. Upon return of spontaneous circulation (ROSC), lncRNA and mRNA expression in the rat cerebral cortex was assayed with high-throughput Agilent lncRNA and mRNA microarrays. In total, 37 lncRNAs were upregulated and 21 lncRNAs were downregulated in the CA group, and 258 mRNA transcripts were differentially expressed with 177 mRNAs upregulated and 81 mRNAs downregulated in the CA group. The differentially expressed lncRNAs in the CA group were co-expressed with thousands of mRNAs. The differentially expressed lncRNAs could be clustered into >100 signaling pathways and processes according to Gene Ontology, and Kyoto Encyclopedia of Genes and Genomes analyses. The most common predicted functions involved metabolic pathways, protein synthesis, transport and degradation during CA-ROSC. CA-ROSC led to significant alterations in cerebral lncRNA and mRNA expression profiles. Thus, lncRNA-mRNA network interactions have the potential to regulate vital metabolic pathways and processes involved in CA-ROSC.
Collapse
Affiliation(s)
- Rong Liu
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Xiaoxing Liao
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xin Li
- Department of Emergency, Guangdong Provincial People's Hospital, Guangzhou, Guangdong 510080, P.R. China
| | - Hongyan Wei
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Qing Liang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Zuopeng Zhang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Meixian Yin
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiaoyun Zeng
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Zijing Liang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Chunlin Hu
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| |
Collapse
|
22
|
Szabo C, Papapetropoulos A. International Union of Basic and Clinical Pharmacology. CII: Pharmacological Modulation of H 2S Levels: H 2S Donors and H 2S Biosynthesis Inhibitors. Pharmacol Rev 2017; 69:497-564. [PMID: 28978633 PMCID: PMC5629631 DOI: 10.1124/pr.117.014050] [Citation(s) in RCA: 267] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Over the last decade, hydrogen sulfide (H2S) has emerged as an important endogenous gasotransmitter in mammalian cells and tissues. Similar to the previously characterized gasotransmitters nitric oxide and carbon monoxide, H2S is produced by various enzymatic reactions and regulates a host of physiologic and pathophysiological processes in various cells and tissues. H2S levels are decreased in a number of conditions (e.g., diabetes mellitus, ischemia, and aging) and are increased in other states (e.g., inflammation, critical illness, and cancer). Over the last decades, multiple approaches have been identified for the therapeutic exploitation of H2S, either based on H2S donation or inhibition of H2S biosynthesis. H2S donation can be achieved through the inhalation of H2S gas and/or the parenteral or enteral administration of so-called fast-releasing H2S donors (salts of H2S such as NaHS and Na2S) or slow-releasing H2S donors (GYY4137 being the prototypical compound used in hundreds of studies in vitro and in vivo). Recent work also identifies various donors with regulated H2S release profiles, including oxidant-triggered donors, pH-dependent donors, esterase-activated donors, and organelle-targeted (e.g., mitochondrial) compounds. There are also approaches where existing, clinically approved drugs of various classes (e.g., nonsteroidal anti-inflammatories) are coupled with H2S-donating groups (the most advanced compound in clinical trials is ATB-346, an H2S-donating derivative of the non-steroidal anti-inflammatory compound naproxen). For pharmacological inhibition of H2S synthesis, there are now several small molecule compounds targeting each of the three H2S-producing enzymes cystathionine-β-synthase (CBS), cystathionine-γ-lyase, and 3-mercaptopyruvate sulfurtransferase. Although many of these compounds have their limitations (potency, selectivity), these molecules, especially in combination with genetic approaches, can be instrumental for the delineation of the biologic processes involving endogenous H2S production. Moreover, some of these compounds (e.g., cell-permeable prodrugs of the CBS inhibitor aminooxyacetate, or benserazide, a potentially repurposable CBS inhibitor) may serve as starting points for future clinical translation. The present article overviews the currently known H2S donors and H2S biosynthesis inhibitors, delineates their mode of action, and offers examples for their biologic effects and potential therapeutic utility.
Collapse
Affiliation(s)
- Csaba Szabo
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, Texas (C.S.); Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Zografou, Greece (A.P.); and Clinical, Experimental Surgery and Translational Research Center, Biomedical Research Foundation of the Academy of Athens, Athens, Greece (A.P.)
| | - Andreas Papapetropoulos
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, Texas (C.S.); Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Zografou, Greece (A.P.); and Clinical, Experimental Surgery and Translational Research Center, Biomedical Research Foundation of the Academy of Athens, Athens, Greece (A.P.)
| |
Collapse
|
23
|
Song Y, Zhang F, Ying C, Kumar KA, Zhou X. Inhibition of NF-κB activity by aminoguanidine alleviates neuroinflammation induced by hyperglycemia. Metab Brain Dis 2017. [PMID: 28634786 DOI: 10.1007/s11011-017-0013-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Neuroinflammation is a key feature of cerebral complication which is associated with diabetes mellitus (DM). Inducible nitric oxide synthase (iNOS) is implicated in the pathogenesis of neuroinflammation. However, how iNOS facilitates the development of inflammation in brain is still unidentified. The aim of the present study was to investigate the association of iNOS and neuroinflammation in diabetic mice, and elucidate the potential mechanisms underlying aminoguanidine (AG), the selective inhibitor of iNOS, protected neurons against inflammation in diabetic mice. In present experiment, diabetic mice model were established by a single intraperitoneal injection of streptozotocin (STZ). AG was administered to diabetic mice for ten weeks after this disease induction. Then we measured iNOS activity in the serum and brain, detected the glial fibrillary acidic protein (GFAP) and ionised calcium binding adaptor molecule-1 (Iba-1) expressions in the brain. Moreover, nuclear factor-kappa B (NF-κB) in cytoplasm and nucleus were tested by IP and WB. Results revealed that high expression of iNOS in serum and brain could be reversed by AG treatment. Furthermore, AG could also inhibit GFAP and Iba-1 expressions, and NF-κB nuclear translocation by inhibiting it from binding to iNOS in cytoplasm. Our findings indicated that iNOS can combine with NF-κB in cytoplasm and promote its nuclear transfer in diabetic mice. Furthermore, AG decreased neuroinflammation through inhibiting iNOS activity and reducing NF-κB nuclear translocation by promoting its dissociation with iNOS in cytoplasm.
Collapse
Affiliation(s)
- Yuanjian Song
- Department of Genetics, Research Facility Center for Morphology, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, People's Republic of China
| | - Fang Zhang
- Department of Genetics, Research Facility Center for Morphology, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, People's Republic of China
| | - Changjiang Ying
- Department of Endocrinology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, 221002, People's Republic of China
| | - Kiran Ashok Kumar
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, People's Republic of China
| | - Xiaoyan Zhou
- Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, People's Republic of China.
- Laboratory of Morphology, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, Jiangsu, 221004, People's Republic of China.
| |
Collapse
|
24
|
Hydrogen sulfide in paraventricular nucleus attenuates blood pressure by regulating oxidative stress and inflammatory cytokines in high salt-induced hypertension. Toxicol Lett 2017; 270:62-71. [DOI: 10.1016/j.toxlet.2017.02.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/22/2017] [Accepted: 02/05/2017] [Indexed: 11/21/2022]
|
25
|
Ding T, Chen W, Li J, Ding J, Mei X, Hu H. High Glucose Induces Mouse Mesangial Cell Overproliferation via Inhibition of Hydrogen Sulfide Synthesis in a TLR-4-Dependent Manner. Cell Physiol Biochem 2017; 41:1035-1043. [DOI: 10.1159/000461483] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 12/19/2016] [Indexed: 11/19/2022] Open
Abstract
Background/Aims: Overproliferation of mesangial cells was believed to play an important role in the progress of diabetic nephropathy, one of the primary complications of diabetes. Hydrogen sulfide (H2S), a well-known and pungent gas with the distinctive smell of rotten eggs, was discovered to play a protective role in diabetic nephropathy. Methods: MTT assay was used to examine the viability of mesangial cells. Small interfering RNA was used to knock down the expression of TLR4 while specific inhibitor LY294002 to suppress the function of PI3K. H2S generation rate was determined by a H2S micro-respiration sensor. Results: Glucose of 25mM induced significant mesangial cells proliferation, which was accomplished by significantly inhibited endogenous H2S synthesis. And exogenous H2S treatment by NaHS markedly mitigated the overproliferation of mouse mesangial cells. Furthermore, it was found that H2S deficiency could result in TLR4 activation. And H2S supplementation remarkably inhibited TLR4 expression and curbed the mesangial cell overproliferation. Besides, PI3K/Akt pathway inhibition also significantly ameliorated the cell overproliferation. Conclusion: High glucose (HG) induces mouse mesangial cell overproliferation via inhibition of hydrogen sulfide synthesis in a TLR-4-dependent manner. And PI3K/Akt pathway might also play a vital part in the HG-induced mesangial cell overproliferation.
Collapse
|