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Sun X, Wu S, Mao C, Qu Y, Xu Z, Xie Y, Jiang D, Song Y. Therapeutic Potential of Hydrogen Sulfide in Ischemia and Reperfusion Injury. Biomolecules 2024; 14:740. [PMID: 39062455 PMCID: PMC11274451 DOI: 10.3390/biom14070740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/14/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024] Open
Abstract
Ischemia-reperfusion (I/R) injury, a prevalent pathological condition in medical practice, presents significant treatment challenges. Hydrogen sulfide (H2S), acknowledged as the third gas signaling molecule, profoundly impacts various physiological and pathophysiological processes. Extensive research has demonstrated that H2S can mitigate I/R damage across multiple organs and tissues. This review investigates the protective effects of H2S in preventing I/R damage in the heart, brain, liver, kidney, intestines, lungs, stomach, spinal cord, testes, eyes, and other tissues. H2S provides protection against I/R damage by alleviating inflammation and endoplasmic reticulum stress; inhibiting apoptosis, oxidative stress, and mitochondrial autophagy and dysfunction; and regulating microRNAs. Significant advancements in understanding the mechanisms by which H2S reduces I/R damage have led to the development and synthesis of H2S-releasing agents such as diallyl trisulfide-loaded mesoporous silica nanoparticles (DATS-MSN), AP39, zofenopril, and ATB-344, offering a new therapeutic avenue for I/R injury.
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Affiliation(s)
- Xutao Sun
- Department of Typhoid, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China;
| | - Siyu Wu
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (S.W.); (C.M.); (Y.Q.); (Z.X.)
| | - Caiyun Mao
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (S.W.); (C.M.); (Y.Q.); (Z.X.)
| | - Ying Qu
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (S.W.); (C.M.); (Y.Q.); (Z.X.)
| | - Zihang Xu
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (S.W.); (C.M.); (Y.Q.); (Z.X.)
| | - Ying Xie
- Department of Synopsis of the Golden Chamber, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China;
| | - Deyou Jiang
- Department of Synopsis of the Golden Chamber, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China;
| | - Yunjia Song
- Department of Pharmacology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (S.W.); (C.M.); (Y.Q.); (Z.X.)
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Wang R, Wang J, Zhang Z, Ma B, Sun S, Gao L, Gao G. FGF21 alleviates endothelial mitochondrial damage and prevents BBB from disruption after intracranial hemorrhage through a mechanism involving SIRT6. Mol Med 2023; 29:165. [PMID: 38049769 PMCID: PMC10696847 DOI: 10.1186/s10020-023-00755-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023] Open
Abstract
BACKGROUND Disruption of the BBB is a harmful event after intracranial hemorrhage (ICH), and this disruption contributes to a series of secondary injuries. We hypothesized that FGF21 may have protective effects after intracranial hemorrhage (ICH) and investigated possible underlying molecular mechanisms. METHODS Blood samples of ICH patients were collected to determine the relationship between the serum level of FGF21 and the [Formula: see text]GCS%. Wild-type mice, SIRT6flox/flox mice, endothelial-specific SIRT6-homozygous-knockout mice (eSIRT6-/- mice) and cultured human brain microvascular endothelial cells (HCMECs) were used to determine the protective effects of FGF21 on the BBB. RESULTS We obtained original clinical evidence from patient data identifying a positive correlation between the serum level of FGF21 and [Formula: see text]GCS%. In mice, we found that FGF21 treatment is capable of alleviating BBB damage, mitigating brain edema, reducing lesion volume and improving neurofunction after ICH. In vitro, after oxyhemoglobin injury, we further explored the protective effects of FGF21 on endothelial cells (ECs), which are a significant component of the BBB. Mitochondria play crucial roles during various types of stress reactions. FGF21 significantly improved mitochondrial biology and function in ECs, as evidenced by alleviated mitochondrial morphology damage, reduced ROS accumulation, and restored ATP production. Moreover, we found that the crucial regulatory mitochondrial factor deacylase sirtuin 6 (SIRT6) played an irreplaceable role in the effects of FGF21. Using endothelial-specific SIRT6-knockout mice, we found that SIRT6 deficiency largely diminished these neuroprotective effects of FGF21. Then, we revealed that FGF21 might promote the expression of SIRT6 via the AMPK-Foxo3a pathway. CONCLUSIONS We provide the first evidence that FGF21 is capable of protecting the BBB after ICH by improving SIRT6-mediated mitochondrial homeostasis.
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Affiliation(s)
- Runfeng Wang
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Jin Wang
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Zhiguo Zhang
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Bo Ma
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Shukai Sun
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Li Gao
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China
| | - Guodong Gao
- Department of Neurosurgery, Tangdu Hospital, The Air Force Military Medical University, Xi'an, 710038, Shaanxi, China.
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Ibrahim AA, Abdel Mageed SS, Safar MM, El-Yamany MF, Oraby MA. MitoQ alleviates hippocampal damage after cerebral ischemia: The potential role of SIRT6 in regulating mitochondrial dysfunction and neuroinflammation. Life Sci 2023; 328:121895. [PMID: 37385372 DOI: 10.1016/j.lfs.2023.121895] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/01/2023]
Abstract
AIMS Mitochondrial perturbations are the major culprit of the inflammatory response during the initial phase of cerebral ischemia. The present study explored the neuroprotective effect of the mitochondrial-targeted antioxidant, Mitoquinol (MitoQ), against hippocampal neuronal loss in an experimental model of brain ischemia/reperfusion (I/R) injury. MAIN METHODS Rats were subjected to common carotid artery occlusion for 45 min, followed by reperfusion for 24 h. MitoQ (2 mg/kg; i.p daily) was administered for 7 successive days prior to the induction of brain ischemia. KEY FINDINGS I/R rats exhibited hippocampal damage evidenced by aggravated mitochondrial oxidative stress, thereby enhancing mtROS and oxidized mtDNA, together with inhibiting mtGSH. Mitochondrial biogenesis and function were also affected, as reflected by the reduction of PGC-1α, TFAM, and NRF-1 levels, as well as loss of mitochondrial membrane potential (△Ψm (. These changes were associated with neuroinflammation, apoptosis, impairment of cognitive function as well as hippocampal neurodegenerative changes in histopathological examination. Notably, SIRT6 was suppressed. Pretreatment with MitoQ markedly potentiated SIRT6, modulated mitochondrial oxidative status and restored mitochondrial biogenesis and function. In addition, MitoQ alleviated the inflammatory mediators, TNF-α, IL-18, and IL-1β and dampened GFAB immunoexpression along with downregulation of cleaved caspase-3 expression. Reversal of hippocampal function by MitoQ was accompanied by improved cognitive function and hippocampal morphological aberrations. SIGNIFICANCE This study suggests that MitoQ preserved rats' hippocampi from I/R insults via maintenance of mitochondrial redox status, biogenesis, and activity along with mitigation of neuroinflammation and apoptosis, thereby regulating SIRT6.
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Affiliation(s)
- Ayman A Ibrahim
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Sherif S Abdel Mageed
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt.
| | - Marwa M Safar
- Department of Pharmacology and Biochemistry, Faculty of Pharmacy, The British University in Egypt, Cairo, Egypt; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Mohammed F El-Yamany
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Mamdouh A Oraby
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Badr University in Cairo, 11829 Cairo, Egypt.
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Wu K, Wang Y, Liu R, Wang H, Rui T. The role of mammalian Sirtuin 6 in cardiovascular diseases and diabetes mellitus. Front Physiol 2023; 14:1207133. [PMID: 37497437 PMCID: PMC10366693 DOI: 10.3389/fphys.2023.1207133] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 07/03/2023] [Indexed: 07/28/2023] Open
Abstract
Cardiovascular diseases are severe diseases posing threat to human health because of their high morbidity and mortality worldwide. The incidence of diabetes mellitus is also increasing rapidly. Various signaling molecules are involved in the pathogenesis of cardiovascular diseases and diabetes. Sirtuin 6 (Sirt6), which is a class III histone deacetylase, has attracted numerous attentions since its discovery. Sirt6 enjoys a unique structure, important biological functions, and is involved in multiple cellular processes such as stress response, mitochondrial biogenesis, transcription, insulin resistance, inflammatory response, chromatin silencing, and apoptosis. Sirt6 also plays significant roles in regulating several cardiovascular diseases including atherosclerosis, coronary heart disease, as well as cardiac remodeling, bringing Sirt6 into the focus of clinical interests. In this review, we examine the recent advances in understanding the mechanistic working through which Sirt6 alters the course of lethal cardiovascular diseases and diabetes mellitus.
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Huang Y, Omorou M, Gao M, Mu C, Xu W, Xu H. Hydrogen sulfide and its donors for the treatment of cerebral ischaemia-reperfusion injury: A comprehensive review. Biomed Pharmacother 2023; 161:114506. [PMID: 36906977 DOI: 10.1016/j.biopha.2023.114506] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
As an endogenous gas signalling molecule, hydrogen sulfide (H2S) is frequently present in a variety of mammals and plays a significant role in the cardiovascular and nervous systems. Reactive oxygen species (ROS) are produced in large quantities as a result of cerebral ischaemia-reperfusion, which is a very serious class of cerebrovascular diseases. ROS cause oxidative stress and induce specific gene expression that results in apoptosis. H2S reduces cerebral ischaemia-reperfusion-induced secondary injury via anti-oxidative stress injury, suppression of the inflammatory response, inhibition of apoptosis, attenuation of cerebrovascular endothelial cell injury, modulation of autophagy, and antagonism of P2X7 receptors, and it plays an important biological role in other cerebral ischaemic injury events. Despite the many limitations of the hydrogen sulfide therapy delivery strategy and the difficulty in controlling the ideal concentration, relevant experimental evidence demonstrating that H2S plays an excellent neuroprotective role in cerebral ischaemia-reperfusion injury (CIRI). This paper examines the synthesis and metabolism of the gas molecule H2S in the brain as well as the molecular mechanisms of H2S donors in cerebral ischaemia-reperfusion injury and possibly other unknown biological functions. With the active development in this field, it is expected that this review will assist researchers in their search for the potential value of hydrogen sulfide and provide new ideas for preclinical trials of exogenous H2S.
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Affiliation(s)
- Yiwei Huang
- Basic Medical College, Jiamusi University, Jiamusi 154007, Heilongjiang, China; Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, Jiamusi 154007, Heilongjiang, China.
| | - Moussa Omorou
- Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, Jiamusi 154007, Heilongjiang, China; Basic Medical College, Jiamusi University, Jiamusi 154007, Heilongjiang, China.
| | - Meng Gao
- Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, Jiamusi 154007, Heilongjiang, China; Basic Medical College, Jiamusi University, Jiamusi 154007, Heilongjiang, China.
| | - Chenxi Mu
- Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, Jiamusi 154007, Heilongjiang, China; Basic Medical College, Jiamusi University, Jiamusi 154007, Heilongjiang, China.
| | - Weijing Xu
- School of Public Health, Jiamusi University, Jiamusi 154007, Heilongjiang, China.
| | - Hui Xu
- Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, Jiamusi 154007, Heilongjiang, China.
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Cheng J, Fan YQ, Zhang WF, Zhang G, Zeng K, Ye Z, Zhao D, Wu LQ, Chen ZB. Overexpressing SIRT6 can Attenuate the Injury of Intracerebral Hemorrhage by Down-Regulating NF-kB. Neuromolecular Med 2023; 25:53-63. [PMID: 35767210 DOI: 10.1007/s12017-022-08715-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 05/02/2022] [Indexed: 11/29/2022]
Abstract
Sirtuin-6 (SIRT6), a member of the sirtuins family of NAD ( +) dependent deacetylases, has been shown to have beneficial effects in ischemic stroke. However, the role of SIRT6 in intracerebral haemorrhage (ICH) has not reported. We observed that SIRT6 expression was down-regulated in human ICH patients and down-regulated in ICH-induced rat cortical neurons. We subsequently found that SIRT6 overexpression reduced brain tissue damage and increased neuronal survival in the ICH model of rats and hemin-induced cortical neurons. Our further study found that overexpression of SIRT6 can reduce inflammatory response by down-regulating the expression of NF-kB and thus promote the recovery of neurological function in ICH animals. In conclusion, SIRT6 can inhibit the expression of NF-kB and plays a neuroprotective role in ICH by inhibiting the NF-kB-mediated inflammatory response.SIRT6 could be a novel therapeutic target for ICH.
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Affiliation(s)
- Jing Cheng
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Yan-Qin Fan
- Department of Nephrology, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Wen-Fei Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Guo Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Kuo Zeng
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Zhang Ye
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Dan Zhao
- The Open Project of Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan, China
| | - Li-Quan Wu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China
| | - Zhi-Biao Chen
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Street, Wuhan, 430060, China.
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Chojdak-Łukasiewicz J, Bizoń A, Waliszewska-Prosół M, Piwowar A, Budrewicz S, Pokryszko-Dragan A. Role of Sirtuins in Physiology and Diseases of the Central Nervous System. Biomedicines 2022; 10:2434. [PMID: 36289696 PMCID: PMC9598817 DOI: 10.3390/biomedicines10102434] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/18/2022] [Accepted: 09/23/2022] [Indexed: 07/30/2023] Open
Abstract
Silent information regulators, sirtuins (SIRTs), are a family of enzymes which take part in major posttranslational modifications of proteins and contribute to multiple cellular processes, including metabolic and energetic transformations, as well as regulation of the cell cycle. Recently, SIRTs have gained increased attention as the object of research because of their multidirectional activity and possible role in the complex pathomechanisms underlying human diseases. The aim of this study was to review a current literature evidence of SIRTs' role in the physiology and pathology of the central nervous system (CNS). SIRTs have been demonstrated to be crucial players in the crosstalk between neuroinflammation, neurodegeneration, and metabolic alterations. The elucidation of SIRTs' role in the background of various CNS diseases offers a chance to define relevant markers of their progression and promising candidates for novel therapeutic targets. Possible diagnostic and therapeutic implications from SIRTs-related investigations are discussed, as well as their future directions and associated challenges.
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Affiliation(s)
| | - Anna Bizoń
- Department of Toxicology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
| | | | - Agnieszka Piwowar
- Department of Toxicology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
| | - Sławomir Budrewicz
- Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland
| | - Anna Pokryszko-Dragan
- Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland
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Olson KR. A Case for Hydrogen Sulfide Metabolism as an Oxygen Sensing Mechanism. Antioxidants (Basel) 2021; 10:antiox10111650. [PMID: 34829521 PMCID: PMC8615108 DOI: 10.3390/antiox10111650] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/08/2021] [Accepted: 10/13/2021] [Indexed: 12/30/2022] Open
Abstract
The ability to detect oxygen availability is a ubiquitous attribute of aerobic organisms. However, the mechanism(s) that transduce oxygen concentration or availability into appropriate physiological responses is less clear and often controversial. This review will make the case for oxygen-dependent metabolism of hydrogen sulfide (H2S) and polysulfides, collectively referred to as reactive sulfur species (RSS) as a physiologically relevant O2 sensing mechanism. This hypothesis is based on observations that H2S and RSS metabolism is inversely correlated with O2 tension, exogenous H2S elicits physiological responses identical to those produced by hypoxia, factors that affect H2S production or catabolism also affect tissue responses to hypoxia, and that RSS efficiently regulate downstream effectors of the hypoxic response in a manner consistent with a decrease in O2. H2S-mediated O2 sensing is then compared to the more generally accepted reactive oxygen species (ROS) mediated O2 sensing mechanism and a number of reasons are offered to resolve some of the confusion between the two.
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Affiliation(s)
- Kenneth R Olson
- Department of Physiology, Indiana University School of Medicine-South Bend, South Bend, IN 46617, USA
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9
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Hydrogen Sulfide and the Immune System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1315:99-128. [PMID: 34302690 DOI: 10.1007/978-981-16-0991-6_5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Hydrogen sulfide (H2S) is the "third gasotransmitter" recognized alongside nitric oxide (NO) and carbon monoxide (CO). H2S exhibits an array of biological effects in mammalian cells as revealed by studies showing important roles in the cardiovascular system, in cell signalling processes, post-translational modifications and in the immune system. Regarding the latter, using pharmacological and genetic approaches scientists have shown this molecule to have both pro- and anti-inflammatory effects in mammalian systems. The anti-inflammatory effects of H2S appeared to be due to its inhibitory action on the nuclear factor kappa beta signalling pathway; NF-kB representing a transcription factor involved in the regulation pro-inflammatory mediators like nitric oxide, prostaglandins, and cytokines. In contrast, results from several animal model describe a more complicated picture and report on pro-inflammatory effects linked to exposure to this molecule; linked to dosage used and point of administration of this molecule. Overall, roles for H2S in several inflammatory diseases spanning arthritis, atherosclerosis, sepsis, and asthma have been described by researchers. In light this work fascinating research, this chapter will cover H2S biology and its many roles in the immune system.
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Zhang Y, Li K, Wang X, Ding Y, Ren Z, Fang J, Sun T, Guo Y, Chen Z, Wen J. CSE-Derived H 2S Inhibits Reactive Astrocytes Proliferation and Promotes Neural Functional Recovery after Cerebral Ischemia/Reperfusion Injury in Mice Via Inhibition of RhoA/ROCK 2 Pathway. ACS Chem Neurosci 2021; 12:2580-2590. [PMID: 34252278 DOI: 10.1021/acschemneuro.0c00674] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The effect of cystathionine-γ-lyase (CSE)-derived hydrogen sulfide (H2S) on the reactive proliferation of astrocytes and neural functional recovery over 30 d after acute cerebral ischemia and reperfusion (I/R) was determined by applying wild-type (WT) and CSE knockout (KO) mice. The changes of glial fibrillary acidic protein (GFAP) expression in hippocampal tissues was tested. Besides, we assessed the changes of mice spatial learning memory ability, neuronal damage, RhoA, Rho kinase 2 (ROCK2), and myelin basic protein (MBP) expressions in hippocampal tissues. The results revealed that cerebral I/R resulted in obvious increase of GFAP expression in hippocampal tissues. Besides, we found the neuronal damage, learning, and memory deficits of mice induced by cerebral I/R as well as revealed the upregulation of RhoA and ROCK2 expressions and reduced MBP expression in hipppcampal tissues of mice following cerebral I/R. Not surprisingly, the GFAP expression and cerebral injury as well as the upregulation of the RhoA/ROCK2 pathway were more remarkable in CSE KO mice, compared with those in WT mice over 30 d following acute cerebral I/R, which could be blocked by NaHS treatment, a donor of exogenous H2S. In addition, the ROCK inhibitor Fasudil also inhibited the reactive proliferation of astrocytes and ameliorated the recovery of neuronal function over 30 d after cerebral I/R. For the purpose of further confirmation of the role of H2S on the astrocytes proliferation following cerebral I/R, the immunofluorescence double staining: bromodeoxyuridine (BrdU) and GFAP was evaluated. There was a marked upregulation of BrdU-labeled cells coexpressed with GFAP in hippocampal tissues at 30 d after acute cerebral I/R; however, the increment of astrocytes proliferation could be ameliorated by both NaHS and Fasudil. These findings indicated that CSE-derived H2S could inhibit the reactive proliferation of astrocytes and promote the recovery of mice neural functional deficits induced by a cerebral I/R injury via inhibition of the RhoA/ROCK2 signal pathway.
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Affiliation(s)
- Yang Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Kexin Li
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Xiangyi Wang
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Yanyu Ding
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Zhiruo Ren
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Jinglong Fang
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Tao Sun
- Department of Cardiovascular Surgery, First Affiliated Hospital of Anhui Medical University, Hefei 230032, China
| | - Yan Guo
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Zhiwu Chen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Jiyue Wen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
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Liu X, Jiang D, Huang W, Teng P, Zhang H, Wei C, Cai X, Liang Y. Sirtuin 6 attenuates angiotensin II-induced vascular adventitial aging in rat aortae by suppressing the NF-κB pathway. Hypertens Res 2021; 44:770-780. [PMID: 33654247 DOI: 10.1038/s41440-021-00631-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 11/24/2020] [Accepted: 12/30/2020] [Indexed: 01/31/2023]
Abstract
Adventitia-induced vascular remodeling plays an important role in vascular aging. However, the mechanism remains unclear. In this study, we found that sirtuin 6 (SIRT6) expression was downregulated in the aortae of aged rats compared with those of young rats. Adventitial fibroblasts (AFs) were isolated and cultured from rat aortae to clarify the relationship between SIRT6 expression and vascular aging. Lentivirus-mediated SIRT6 knockdown promoted the aging phenotype in AFs, affecting proliferation, collagen secretion, migration, and α-smooth muscle actin expression. Moreover, angiotensin II (Ang II) decreased SIRT6 expression, activated the NF-κB pathway, and led to vascular aging. The NF-κB pathway inhibitor BAY 11-7082 reduced Ang II-induced nuclear translocation of the NF-κB p65 subunit and other effects of Ang II, such as AF proliferation, collagen secretion, and migration. Mechanistically, SIRT6 suppression increased acetyl-NF-κB p65 (Lys310) expression and NF-κB transcriptional activity in SIRT6-knockdown AFs. SIRT6 could directly bind to the p65 subunit and attenuate Ang II-induced NF-κB activation and vascular aging. In summary, this study was the first to correlate SIRT6 expression and adventitia-induced vascular senescence. SIRT6 maybe a biomarker of vascular aging, and activating SIRT6 maybe a therapeutic strategy for delaying vascular aging.
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Affiliation(s)
- Xiaoqian Liu
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Dongyang Jiang
- Department of Geriatric Cardiology, Weifang Medical University, Weifang, 261053, Shandong, PR China
| | - Wen Huang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Peixiu Teng
- Department of Cardiology, Jinan Third People's Hospital, Jinan, 250100, Shandong, PR China
| | - Hui Zhang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Chuanqiao Wei
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Xiaowen Cai
- Department of General Practice, Shandong First Medical University, Taian, 271016, Shandong, PR China
| | - Ying Liang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China.
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12
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Hydrogen Sulfide and Pathophysiology of the CNS. NEUROPHYSIOLOGY+ 2021. [DOI: 10.1007/s11062-021-09887-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Liu G, Chen H, Liu H, Zhang W, Zhou J. Emerging roles of SIRT6 in human diseases and its modulators. Med Res Rev 2021; 41:1089-1137. [PMID: 33325563 PMCID: PMC7906922 DOI: 10.1002/med.21753] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/27/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
Abstract
The biological functions of sirtuin 6 (SIRT6; e.g., deacetylation, defatty-acylation, and mono-ADP-ribosylation) play a pivotal role in regulating lifespan and several fundamental processes controlling aging such as DNA repair, gene expression, and telomeric maintenance. Over the past decades, the aberration of SIRT6 has been extensively observed in diverse life-threatening human diseases. In this comprehensive review, we summarize the critical roles of SIRT6 in the onset and progression of human diseases including cancer, inflammation, diabetes, steatohepatitis, arthritis, cardiovascular diseases, neurodegenerative diseases, viral infections, renal and corneal injuries, as well as the elucidation of the related signaling pathways. Moreover, we discuss the advances in the development of small molecule SIRT6 modulators including activators and inhibitors as well as their pharmacological profiles toward potential therapeutics for SIRT6-mediated diseases.
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Affiliation(s)
- Gang Liu
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, USA
| | - Haiying Chen
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, USA
| | - Hua Liu
- Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Wenbo Zhang
- Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Jia Zhou
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, USA
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Buyang Huanwu Decoction Promotes Angiogenesis after Cerebral Ischemia by Inhibiting the Nox4/ROS Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:5264205. [PMID: 32802129 PMCID: PMC7415092 DOI: 10.1155/2020/5264205] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 06/30/2020] [Indexed: 12/14/2022]
Abstract
Background Buyang Huanwu decoction (BYHWD), an important traditional Chinese medicine (TCM), has been used clinically for centuries for the treatment of various diseases. The study aims to explore the BYHWD effects on angiogenesis and neuroprotection after cerebral ischemia/reperfusion (CI/R) injury in rats and to explore the underlying angiogenic roles and mechanisms of BYHWD in hydrogen peroxide (H2O2) induced oxidative stress in human umbilical vein endothelial cells (HUVECs) model. Methods The effects of BYHWD on neurological function were screened by measuring neurological deficits, spatial memory function, and angiogenesis (by microvascular density (MVD) and cerebral blood flow (CBF)) after CI/R injury in middle cerebral artery occlusion (MCAO) in vivo in rats. In vitro, we examined the angiogenic roles and mechanisms of action of BYHWD in an H2O2-induced oxidative stress HUVECs model by measuring cell viability, apoptosis, vascular tube formation, intracellular ROS generation, NADPH oxidase (Nox) activity, and Nox4 protein expression. Results BYHWD significantly improved neurological function, including neurological deficits and spatial learning and memory, and significantly increased MVD and CBF in the ischemic penumbra after CI/R injury in rats. BYHWD significantly increased cell viability, inhibited apoptosis, induced vascular tube formation, decreased intracellular ROS generation, and reduced Nox activity and Nox4 protein expression in H2O2-treated HUVECs in a dose-dependent manner. Conclusions Our study demonstrates that BYHWD promotes neurological function recovery and increases angiogenesis. BYHWD exerts angiogenic effects against cerebral ischemic injury through the downregulation of Nox4, which results in the reduction of ROS generation.
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Nin DS, Idres SB, Song ZJ, Moore PK, Deng LW. Biological Effects of Morpholin-4-Ium 4 Methoxyphenyl (Morpholino) Phosphinodithioate and Other Phosphorothioate-Based Hydrogen Sulfide Donors. Antioxid Redox Signal 2020; 32:145-158. [PMID: 31642346 DOI: 10.1089/ars.2019.7896] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Significance: Hydrogen sulfide (H2S) is regarded as the third gasotransmitter along with nitric oxide and carbon monoxide. Extensive studies have demonstrated a variety of biological roles for H2S in neurophysiology, cardiovascular disease, endocrine regulation, and other physiological and pathological processes. Recent Advances: Novel H2S donors have proved useful in understanding the biological functions of H2S, with morpholin-4-ium 4 methoxyphenyl (morpholino) phosphinodithioate (GYY4137) being one of the most common pharmacological tools used. One advantage of GYY4137 over sulfide salts is its ability to release H2S in a slow and sustained manner akin to endogenous H2S production, rather than the delivery of H2S as a single concentrated burst. Critical Issues: Here, we summarize recent progress made in the characterization of the biological activities and pharmacological effects of GYY4137 in a range of in vitro and in vivo systems. Recent developments in the structural modification of GYY4137 to generate new compounds and their biological effects are also discussed. Future Directions: Slow-releasing H2S donor, GYY4137, and other phosphorothioate-based H2S donors are potent tools to study the biological functions of H2S. Despite recent progress, more work needs to be performed on these new compounds to unravel the mechanisms behind H2S release and pace of its discharge, as well as to define the effects of by-products of donors after H2S liberation. This will not only lead to better in-depth understanding of the biological effects of H2S but will also shed light on the future development of a new class of therapeutic agents with potential to treat a wide range of human diseases.
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Affiliation(s)
- Dawn Sijin Nin
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Shabana Binte Idres
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Zhi Jian Song
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Philip K Moore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lih-Wen Deng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,National University Cancer Institute, National University Health System, Singapore, Singapore
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Evaluation of long-term rt-PA effects on bEnd.3 endothelial cells under ischemic conditions; changes in ZO-1 expression and glycosylation of the bradykinin B2 receptor. Thromb Res 2020; 187:1-8. [PMID: 31935582 DOI: 10.1016/j.thromres.2019.12.021] [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: 03/20/2019] [Revised: 12/20/2019] [Accepted: 12/27/2019] [Indexed: 02/07/2023]
Abstract
Recombinant tissue plasminogen activator (rt-PA) has proven effective in the treatment of acute ischemic stroke, despite the increased risk of hemorrhagic transformation (HT), its major associated complication. Although it is known that HT is related to blood brain barrier (BBB) disruption, the underlying mechanisms are not well established. We assessed time-dependent effects of rt-PA on the bEnd.3 murine brain endothelial cell line subjected either to normoxia or to 2.5 h of oxygen and glucose deprivation (OGD), evaluating a longer period than has previously been done, beyond 6 h post-reoxygenation. Parameters of cell viability, metabolic activity, ionic and transcellular permeability, as well as levels of claudin-5, zonula occludens-1 (ZO-1) and bradykinin B2 receptor (B2R) protein expression were analyzed at 24, 48 and 72 h post-reoxygenation with or without the administration of rt-PA. rt-PA treatment increased both the ionic and transcellular permeability until 72 h and did not modify cell viability or metabolic activity or the expression of claudin-5, ZO-1 and B2R under normoxia at any analyzed time. Under OGD conditions, rt-PA exacerbated OGD effects on metabolic activity from 48 to 72 h, increased transcellular permeability from 24 to 72 h, significantly decreased ZO-1 protein levels at the plasma membrane and increased B2R glycosylation at 72 h post-reoxygenation. Our findings suggest that a long-term analysis is necessary to elucidate time-dependent molecular mechanisms associated to BBB breakdown due to rt-PA administration under ischemia. Thus, protective BBB therapies after ischemic stroke and rt-PA treatment should be explored at least until 72 h after OGD and rt-PA administration.
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Pushchina EV, Varaksin AA, Obukhov DK, Prudnikov IM. GFAP expression in the optic nerve and increased H 2S generation in the integration centers of the rainbow trout ( Oncorhynchus mykiss) brain after unilateral eye injury. Neural Regen Res 2020; 15:1867-1886. [PMID: 32246635 PMCID: PMC7513979 DOI: 10.4103/1673-5374.280320] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Hydrogen sulfide (H2S) is considered as a protective factor against cardiovascular disorders. However, there are few reports on the effects of H2S in the central nervous system during stress or injury. Previous studies on goldfish have shown that astrocytic response occurs in the damaged and contralateral optic nerves. Glial fibrillary acidic protein (GFAP) concentration in the optic nerves of rainbow trout has not been measured previously. This study further characterized the astrocytic response in the optic nerve and the brain of a rainbow trout (Oncorhynchus mykiss) after unilateral eye injury and estimated the amount of H2S-producing enzyme cystathionine β-synthase (CBS) in the brain of the rainbow trout. Within 1 week after unilateral eye injury, a protein band corresponding to a molecular weight of 50 kDa was identified in the ipsi- and contralateral optic nerves of the rainbow trout. The concentration of GFAP in the injured optic nerve increased compared to the protein concentration on the contralateral side. The results of a quantitative analysis of GFAP+ cell distribution in the contralateral optic nerve showed the largest number of GFAP+ cells and fibers in the optic nerve head. In the damaged optic nerve, patterns of GFAP+ cell migration and large GFAP+ bipolar activated astrocytes were detected at 1 week after unilateral eye injury. The study of H2S-producing system after unilateral eye injury in the rainbow trout was conducted using enzyme-linked immunosorbent assay, western blot analysis, and immunohistochemistry of polyclonal antibodies against CBS in the integrative centers of the brain: telencephalon, optic tectum, and cerebellum. Enzyme-linked immunosorbent assay results showed a 1.7-fold increase in CBS expression in the rainbow trout brain at 1 week after unilateral eye injury compared with that in intact animals. In the ventricular and subventricular regions of the rainbow trout telencephalon, CBS+ radial glia and neuroepithelial cells were identified. After unilateral eye injury, the number of CBS+ neuroepithelial cells in the pallial and subpallial periventricular regions of the telencephalon increased. In the optic tectum, unilateral eye injury led to an increase in CBS expression in radial glial cells; simultaneously, the number of CBS+ neuroepithelial cells decreased in intact animals. In the cerebellum of the rainbow trout, neuroglial interrelationships were revealed, where H2S was released, apparently, from astrocyte-like cells. The organization of H2S-producing cell complexes suggests that, the amount of glutamate produced in the rainbow trout cerebellum and its reuptake was controlled by astrocyte-like cells, reducing its excitotoxicity. In the dorsal matrix zone and granular eminences of the rainbow trout cerebellum, CBS was expressed in neuroepithelial cells. After unilateral eye injury, the level of CBS activity increased in all parts of the cerebellum. An increase in the number of H2S-producing cells was a response to oxidative stress after unilateral eye injury, and the overproduction of H2S in the cerebellum occurred to neutralize reactive oxygen species, providing the cells of the rainbow trout cerebellum with a protective effect. A structural reorganization in the dorsal matrix zone, associated with the appearance of an additional CBS+ apical zone, and a decrease in the enzyme activity in the dorsal matrix zone, was revealed in the zones of constitutive neurogenesis. All experiments were approved by the Commission on Biomedical Ethics, A.V. Zhirmunsky National Scientific Center of Marine Biology (NSCMB), Far Eastern Branch, Russian Academy of Science (FEB RAS) (approval No. 1) on July 31, 2019.
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Affiliation(s)
- Evgeniya V Pushchina
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia; A.A. Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Anatoly A Varaksin
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
| | | | - Igor M Prudnikov
- A.A. Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
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Morales-Loredo H, Barrera A, Garcia JM, Pace CE, Naik JS, Gonzalez Bosc LV, Kanagy NL. Hydrogen sulfide regulation of renal and mesenteric blood flow. Am J Physiol Heart Circ Physiol 2019; 317:H1157-H1165. [PMID: 31625777 DOI: 10.1152/ajpheart.00303.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hydrogen sulfide (H2S) dilates isolated arteries, and knockout of the H2S-synthesizing enzyme cystathionine γ-lyase (CSE) increases blood pressure. However, the contributions of endogenously produced H2S to blood flow regulation in specific vascular beds are unknown. Published studies in isolated arteries show that CSE production of H2S influences vascular tone more in small mesenteric arteries than in renal arteries or the aorta. Therefore, the goal of this study was to evaluate H2S regulation of blood pressure, vascular resistance, and regional blood flows using chronically instrumented rats. We hypothesized that during whole animal CSE inhibition, vascular resistance would increase more in the mesenteric than the renal circulation. Under anesthesia, CSE inhibition [β-cyanoalanine (BCA), 30 mg/kg bolus + 5 mg·kg-1·min-1 for 20 min iv) rapidly increased mean arterial pressure (MAP) more than saline administration (%Δ: saline -1.4 ± 0.75 vs. BCA 7.1 ± 1.69, P < 0.05) but did not change resistance (MAP/flow) in either the mesenteric or renal circulation. In conscious rats, BCA infusion similarly increased MAP (%Δ: saline -0.8 ± 1.18 vs. BCA 8.2 ± 2.6, P < 0.05, n = 7) and significantly increased mesenteric resistance (saline 0.9 ± 3.1 vs. BCA 15.6 ± 6.5, P < 0.05, n = 12). The H2S donor Na2S (50 mg/kg) decreased blood pressure and mesenteric resistance ,but the fall in resistance was not significant. Inhibiting CSE for multiple days with dl-proparglycine (PAG, 50 mg·kg-1·min-1 iv bolus for 5 days) significantly increased vascular resistance in both mesenteric (ratio of day 1: saline 0.86 ± 0.033 vs. PAG 1.79 ± 0.38) and renal circulations (ratio of day 1: saline 1.26 ± 0.22 vs. 1.98 ± 0.14 PAG). These results support our hypothesis that CSE-derived H2S is an important regulator of blood pressure and vascular resistance in both mesenteric and renal circulations. Furthermore, inhalation anesthesia diminishes the effect of CSE inhibition on vascular tone.NEW & NOTEWORTHY These results suggest that CSE-derived H2S has a prominent role in regulating blood pressure and blood flow under physiological conditions, which may have been underestimated in prior studies in anesthetized subjects. Therefore, enhancing substrate availability or enzyme activity or dosing with H2S donors could be a novel therapeutic approach to treat cardiovascular diseases.
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Affiliation(s)
- Humberto Morales-Loredo
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Adelaeda Barrera
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Joshua M Garcia
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Carolyn E Pace
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Jay S Naik
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Laura V Gonzalez Bosc
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Nancy L Kanagy
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico
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Sirtuins and SIRT6 in Carcinogenesis and in Diet. Int J Mol Sci 2019; 20:ijms20194945. [PMID: 31591350 PMCID: PMC6801518 DOI: 10.3390/ijms20194945] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 10/03/2019] [Indexed: 02/06/2023] Open
Abstract
Sirtuins are a highly conserved family of nicotinamide adenine dinucleotide (NAD)-dependent protein lysine modifying enzymes. They are key regulators for a wide variety of cellular and physiological processes such as cell proliferation, differentiation, DNA damage and stress response, genome stability, cell survival, metabolism, energy homeostasis, organ development and aging. Aging is one of the major risk factors of cancer, as many of the physiological mechanisms and pathologies associated with the aging process also contribute to tumor initiation, growth and/or metastasis. This review focuses on one the mammalian sirtuins, SIRT6, which has emerged as an important regulator of longevity and appears to have multiple biochemical functions that interfere with tumor development and may be useful in cancer prevention and for site-specific treatment. The recent evidence of the role of SIRT6 in carcinogenesis is also discussed, focusing on the potential use of SIRT6 modulators in cancer nanomedicine.
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20
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Zille M, Ikhsan M, Jiang Y, Lampe J, Wenzel J, Schwaninger M. The impact of endothelial cell death in the brain and its role after stroke: A systematic review. Cell Stress 2019; 3:330-347. [PMID: 31799500 PMCID: PMC6859425 DOI: 10.15698/cst2019.11.203] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The supply of oxygen and nutrients to the brain is vital for its function and requires a complex vascular network that, when disturbed, results in profound neurological dysfunction. As part of the pathology in stroke, endothelial cells die. As endothelial cell death affects the surrounding cellular environment and is a potential target for the treatment and prevention of neurological disorders, we have systematically reviewed important aspects of endothelial cell death with a particular focus on stroke. After screening 2876 publications published between January 1, 2010 and August 7, 2019, we identified 154 records to be included. We found that endothelial cell death occurs rapidly as well as later after the onset of stroke conditions. Among the different cell death mechanisms, apoptosis was the most widely investigated (92 records), followed by autophagy (20 records), while other, more recently defined mechanisms received less attention, such as lysosome-dependent cell death (2 records) and necroptosis (2 records). We also discuss the differential vulnerability of brain cells to injury after stroke and the role of endothelial cell death in the no-reflow phenomenon with a special focus on the microvasculature. Further investigation of the different cell death mechanisms using novel tools and biomarkers will greatly enhance our understanding of endothelial cell death. For this task, at least two markers/criteria are desirable to determine cell death subroutines according to the recommendations of the Nomenclature Committee on Cell Death.
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Affiliation(s)
- Marietta Zille
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Maulana Ikhsan
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Yun Jiang
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Josephine Lampe
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Jan Wenzel
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Markus Schwaninger
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, Lübeck, Germany
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21
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Yang Y, Tian T, Wang Y, Li Z, Xing K, Tian G. SIRT6 protects vascular endothelial cells from angiotensin II-induced apoptosis and oxidative stress by promoting the activation of Nrf2/ARE signaling. Eur J Pharmacol 2019; 859:172516. [DOI: 10.1016/j.ejphar.2019.172516] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/23/2019] [Accepted: 06/28/2019] [Indexed: 10/26/2022]
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Helmy MM, Helmy MW, El-Mas MM. Upregulation of cystathionine-γ-lyase/hydrogen sulfide pathway underlies the celecoxib counteraction of cyclosporine-induced hypertension and renal insult in rats. Prostaglandins Other Lipid Mediat 2019; 141:1-10. [DOI: 10.1016/j.prostaglandins.2019.01.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 01/07/2019] [Accepted: 01/14/2019] [Indexed: 12/16/2022]
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Mun J, Kang HM, Jung J, Park C. Role of hydrogen sulfide in cerebrovascular alteration during aging. Arch Pharm Res 2019; 42:446-454. [DOI: 10.1007/s12272-019-01135-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/19/2019] [Indexed: 01/06/2023]
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Gopalakrishnan P, Shrestha B, Kaskas AM, Green J, Alexander JS, Pattillo CB. Hydrogen sulfide: Therapeutic or injurious in ischemic stroke? PATHOPHYSIOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY FOR PATHOPHYSIOLOGY 2019; 26:1-10. [PMID: 30528175 DOI: 10.1016/j.pathophys.2018.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 07/10/2018] [Accepted: 10/22/2018] [Indexed: 01/09/2023]
Abstract
Hydrogen sulfide (H2S) has been identified as a vasodilatory, neuromodulatory, and anti-inflammatory gasotransmitter with antioxidant properties. Studies focused in cardiac tissue suggest H2S functions as a protective agent; however in the central nervous system (CNS) the effects of H2S during states of stress or injury, such as stroke, remain controversial. Currently, the application of H2S donors and modulators in stroke depends on the type of H2S donor and the timing of the therapy.
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Affiliation(s)
- Priya Gopalakrishnan
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA
| | - B Shrestha
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA
| | - A M Kaskas
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA
| | - J Green
- Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA
| | - J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA
| | - C B Pattillo
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130-3932, USA.
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Zuo Y, Huang L, Enkhjargal B, Xu W, Umut O, Travis ZD, Zhang G, Tang J, Liu F, Zhang JH. Activation of retinoid X receptor by bexarotene attenuates neuroinflammation via PPARγ/SIRT6/FoxO3a pathway after subarachnoid hemorrhage in rats. J Neuroinflammation 2019; 16:47. [PMID: 30791908 PMCID: PMC6385420 DOI: 10.1186/s12974-019-1432-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/04/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Subarachnoid hemorrhage (SAH) is a life-threatening subtype of stroke with high mortality and disabilities. Retinoid X receptor (RXR) has been shown to be neuroprotective against ischemia/reperfusion injury. This study aimed to investigate the effects of the selective RXR agonist bexarotene on neuroinflammation in a rat model of SAH. METHODS Two hundred male Sprague-Dawley rats were used. The endovascular perforation induced SAH. Bexarotene was administered intraperitoneally at 1 h after SAH induction. To investigate the underlying mechanism, the selective RXR antagonist UVI3003 and RXR siRNA or SIRT6 inhibitor OSS128167 was administered via intracerebroventricular 1 h before SAH induction. Post-SAH assessments including SAH grade, neurological score, brain water content, Western blot, and immunofluorescence were performed. RESULTS The endogenous RXR and sirtuin 6 (SIRT6) protein levels were increased after SAH. Bexarotene treatment significantly reduced brain edema and improved the short-/long-term neurological deficit after SAH. Mechanistically, bexarotene increased the levels of PPARγ and SIRT6; decreased the expression of phosphorylated FoxO3a (p-FoxO3a), IL-6, IL-1β, and TNF-a; and inhibited the microglia activation and neutrophils infiltration at 24 h after SAH. Either UVI3003, OSS128167, or RXR siRNA abolished the neuroprotective effects of bexarotene and its regulation on protein levels of PPARγ/SIRT6/p-FoxO3a after SAH. CONCLUSIONS The activation of RXR by bexarotene attenuated neuroinflammation and improved neurological deficits after SAH. The anti-neuroinflammatory effect was at least partially through regulating PPARγ/SIRT6/FoxO3a pathway. Bexarotene may be a promising therapeutic strategy in the management of SAH patients.
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Affiliation(s)
- Yuchun Zuo
- Department of Neurosurgery, Third XiangYa Hospital, Central South University, No.138 Tongzipo Road, Changsha, 410013, China.,Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA
| | - Lei Huang
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA.,Department of Neurosurgery, School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA
| | - Budbazar Enkhjargal
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA
| | - Weilin Xu
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA
| | - Ocak Umut
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA
| | - Zachary D Travis
- Department of Earth and Biological Sciences, School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA
| | - Guangyu Zhang
- Mass Spectrometry Core Facility, Loma Linda University, Loma Linda, CA, 92354, USA
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA
| | - Fei Liu
- Department of Neurosurgery, Third XiangYa Hospital, Central South University, No.138 Tongzipo Road, Changsha, 410013, China.
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University, 11041 Campus St. Risley Hall, Loma Linda, CA, 92354, USA. .,Department of Neurosurgery, School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA. .,Department of Anesthesiology, School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA.
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Role of Nitric Oxide and Hydrogen Sulfide in Ischemic Stroke and the Emergent Epigenetic Underpinnings. Mol Neurobiol 2018; 56:1749-1769. [PMID: 29926377 DOI: 10.1007/s12035-018-1141-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 05/22/2018] [Indexed: 02/06/2023]
Abstract
Nitric oxide (NO) and hydrogen sulfide (H2S) are the key gasotransmitters with an imperious role in the maintenance of cerebrovascular homeostasis. A decline in their levels contributes to endothelial dysfunction that portends ischemic stroke (IS) or cerebral ischemia/reperfusion (CI/R). Nevertheless, their exorbitant production during CI/R is associated with exacerbation of cerebrovascular injury in the post-stroke epoch. NO-producing nitric oxide synthases are implicated in IS pathology and their activity is regulated, inter alia, by various post-translational modifications and chromatin-based mechanisms. These account for heterogeneous alterations in NO production in a disease setting like IS. Interestingly, NO per se has been posited as an endogenous epigenetic modulator. Further, there is compelling evidence for an ingenious crosstalk between NO and H2S in effecting the canonical (direct) and non-canonical (off-target collateral) functions. In this regard, NO-mediated S-nitrosylation and H2S-mediated S-sulfhydration of specific reactive thiols in an expanding array of target proteins are the principal modalities mediating the all-pervasive influence of NO and H2S on cell fate in an ischemic brain. An integrated stress response subsuming unfolded protein response and autophagy to cellular stressors like endoplasmic reticulum stress, in part, is entrenched in such signaling modalities that substantiate the role of NO and H2S in priming the cells for stress response. The precis presented here provides a comprehension on the multifarious actions of NO and H2S and their epigenetic underpinnings, their crosstalk in maintenance of cerebrovascular homeostasis, and their "Janus bifrons" effect in IS milieu together with plausible therapeutic implications.
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27
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Khoury N, Koronowski KB, Young JI, Perez-Pinzon MA. The NAD +-Dependent Family of Sirtuins in Cerebral Ischemia and Preconditioning. Antioxid Redox Signal 2018; 28:691-710. [PMID: 28683567 PMCID: PMC5824497 DOI: 10.1089/ars.2017.7258] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 07/04/2017] [Indexed: 12/11/2022]
Abstract
SIGNIFICANCE Sirtuins are an evolutionarily conserved family of NAD+-dependent lysine deacylases and ADP ribosylases. Their requirement for NAD+ as a cosubstrate allows them to act as metabolic sensors that couple changes in the energy status of the cell to changes in cellular physiological processes. NAD+ levels are affected by several NAD+-producing and NAD+-consuming pathways as well as by cellular respiration. Thus their intracellular levels are highly dynamic and are misregulated in a spectrum of metabolic disorders including cerebral ischemia. This, in turn, compromises several NAD+-dependent processes that may ultimately lead to cell death. Recent Advances: A number of efforts have been made to replenish NAD+ in cerebral ischemic injuries as well as to understand the functions of one its important mediators, the sirtuin family of proteins through the use of pharmacological modulators or genetic manipulation approaches either before or after the insult. Critical Issues and Future Directions: The results of these studies have regarded the sirtuins as promising therapeutic targets for cerebral ischemia. Yet, additional efforts are needed to understand the role of some of the less characterized members and to address the sex-specific effects observed with some members. Sirtuins also exhibit cell-type-specific expression in the brain as well as distinct subcellular and regional localizations. As such, they are involved in diverse and sometimes opposing cellular processes that can either promote neuroprotection or further contribute to the injury; which also stresses the need for the development and use of sirtuin-specific pharmacological modulators. Antioxid. Redox Signal. 28, 691-710.
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Affiliation(s)
- Nathalie Khoury
- Department of Neurology; Cerebral Vascular Research Laboratories; and Neuroscience Program, Miller School of Medicine, University of Miami, Miami, Florida
| | - Kevin B. Koronowski
- Department of Neurology; Cerebral Vascular Research Laboratories; and Neuroscience Program, Miller School of Medicine, University of Miami, Miami, Florida
| | - Juan I. Young
- Dr. John T. Macdonald Foundation Department of Human Genetics; Hussman Institute for Human Genomics, and Neuroscience Program, Miller School of Medicine, University of Miami, Miami, Florida
| | - Miguel A. Perez-Pinzon
- Department of Neurology; Cerebral Vascular Research Laboratories; and Neuroscience Program, Miller School of Medicine, University of Miami, Miami, Florida
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28
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Zhang S, Jiang S, Wang H, Di W, Deng C, Jin Z, Yi W, Xiao X, Nie Y, Yang Y. SIRT6 protects against hepatic ischemia/reperfusion injury by inhibiting apoptosis and autophagy related cell death. Free Radic Biol Med 2018; 115:18-30. [PMID: 29129519 DOI: 10.1016/j.freeradbiomed.2017.11.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 11/05/2017] [Accepted: 11/07/2017] [Indexed: 12/22/2022]
Abstract
Silent information regulator 6 (SIRT6), a class III histone deacetylase, has been revealed to participate in multiple metabolic processes in the liver, and it plays important roles in protecting against ischemia/reperfusion (I/R) injury in multiple organs. In this study, we explored whether SIRT6 is protective against hepatic I/R injury and elucidated the underlying mechanisms. The expression of SIRT6 was significantly decreased during reperfusion compared with the control group. SIRT6-LKO mice exhibited significantly aggravated oxidative stress, mitochondrial dysfunction, inflammatory responses, mitogen-activated protein kinase (MAPK) signaling activation, and apoptosis and autophagy related hepatocyte death compared with control mice. In vitro studies in SIRT6-KO hepatocytes exhibited similar results. In contrast, SIRT6 upregulation alleviated liver damage during hepatic I/R injury. Our study demonstrated for the first time that SIRT6 upregulation effectively protects against hepatic I/R injury. The underlying mechanisms involve the maintenance of oxidative homeostasis and mitochondrial function, which subsequently inhibit the inflammatory responses and MAPK signaling, and finally attenuate apoptosis and autophagy related hepatocyte death. These results suggest that the activation of SIRT6 exerts multifaceted protective effects during hepatic I/R injury, which can provide a novel therapeutic target for hepatic I/R injury.
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Affiliation(s)
- Song Zhang
- State Key Laboratory of Cancer Biology, Department of Gastroenterology, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China
| | - Shuai Jiang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences, Northwest University, 229 Taibai North Road, Xi'an 710069, China; Department of Aerospace Medicine, The Fourth Military Medical University, Xi'an 710032, China
| | - Haiping Wang
- Key Laboratory of Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University, 199 Changan South Road, Xi'an 710062, China
| | - Wencheng Di
- Department of Cardiology, Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu 210008, China
| | - Chao Deng
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China
| | - Zhenxiao Jin
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China
| | - Wei Yi
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China
| | - Xiao Xiao
- State Key Laboratory of Cancer Biology, Department of Gastroenterology, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology, Department of Gastroenterology, Xijing Hospital, The Fourth Military Medical University, 127 Changle West Road, Xi'an 710032, China.
| | - Yang Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. Faculty of Life Sciences, Northwest University, 229 Taibai North Road, Xi'an 710069, China; Department of Biomedical Engineering, The Fourth Military Medical University, 169 Changle West Road, Xi'an 710032, China.
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29
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Ng LT, Gruber J, Moore PK. Is there a role of H 2S in mediating health span benefits of caloric restriction? Biochem Pharmacol 2018; 149:91-100. [PMID: 29360438 DOI: 10.1016/j.bcp.2018.01.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 01/17/2018] [Indexed: 02/07/2023]
Abstract
Caloric restriction (CR) is a dietary regimen that aims to reduce the intake of total calories while maintaining adequate supply of key nutrients so as to avoid malnutrition. CR is one of only a small number of interventions that show promising outcomes on health span and lifespan across different species. There is growing interest in the development of compounds that might replicate CR-related benefits without actually restricting food intake. Hydrogen sulfide (H2S) is produced inside the bodies of many animals, including humans, by evolutionarily conserved H2S synthesizing enzymes. Endogenous H2S is increasingly recognized as an important gaseous signalling molecule involved in diverse cellular and molecular processes. However, the specific role of H2S in diverse biological processes remains to be elucidated and not all its biological effects are beneficial. Nonetheless, recent evidence suggests that the biological functions of H2S intersect with the network of evolutionarily conserved nutrient sensing and stress response pathways that govern organismal responses to CR. Induction of H2S synthesizing enzymes appears to be a conserved and essential feature of the CR response in evolutionarily distant organisms, including nematodes and mice. Here we review the evidence for a role of H2S in CR and lifespan modulation. H2S releasing drugs, capable of controlled delivery of exogenous H2S, are currently in clinical development. These findings suggest such H2S releasing drugs as a promising novel avenue for the development of CR mimetic compounds.
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Affiliation(s)
- Li Theng Ng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore; Yale-NUS College, Science Division, Singapore
| | - Jan Gruber
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Yale-NUS College, Science Division, Singapore.
| | - Philip Keith Moore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore
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30
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Iwasawa E, Ishibashi S, Suzuki M, Li F, Ichijo M, Miki K, Yokota T. Sphingosine-1-Phosphate Receptor 1 Activation Enhances Leptomeningeal Collateral Development and Improves Outcome after Stroke in Mice. J Stroke Cerebrovasc Dis 2018; 27:1237-1251. [PMID: 29337049 DOI: 10.1016/j.jstrokecerebrovasdis.2017.11.040] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/19/2017] [Accepted: 11/28/2017] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Development of collateral circulation after acute ischemic stroke is triggered by shear stress that occurs in pre-existing arterioles. Recently, sphingosine-1-phosphate receptor 1 (S1P1) on endothelial cells was reported to sense shear stress and transduce its signaling pathways. METHODS BALB/c mice (n = 118) were subjected to permanent middle cerebral artery occlusion (pMCAO) or sham operation. We investigated the effect of an S1P1-selective agonist SEW2871 on leptomeningeal collateral arteries and neurological outcome after pMCAO. RESULTS Immunohistochemistry showed that without treatment, the expression of S1P1 on endothelial cells of leptomeningeal arteries and capillaries increased early after pMCAO, peaking at 6 hours, whereas a significant increase in the expression of S1P1 in neurons was seen from 24 hours later. After intraperitoneal administration of SEW2871 for 7 days after pMCAO, the number of leptomeningeal collateral arteries was significantly increased, cerebral blood flow improved, infarct volume was decreased, and neurological outcome improved compared with the controls. Significantly increased phosphorylation of endothelial nitric oxide synthase (eNOS) as early as 6 hours after pMCAO and higher expression of tight junction proteins at postoperative day 3 were observed with SEW2871 treatment as assessed by Western blot. Daily administration of SEW2871 also increased capillary density in peri-infarct regions and promoted monocyte/macrophage mobilization to the surface of ischemic cortex at 7 days after pMCAO. CONCLUSIONS An S1P1-selective agonist enhanced leptomeningeal collateral circulation via eNOS phosphorylation and promoted postischemic angiogenesis with reinforced blood-brain barrier integrity in a mouse model of acute ischemic stroke, leading to smaller infarct volume and better neurological outcome.
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Affiliation(s)
- Eri Iwasawa
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Satoru Ishibashi
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Motohiro Suzuki
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - FuYing Li
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masahiko Ichijo
- Department of Neurology, Musashino Red Cross Hospital, Tokyo, Japan
| | - Kazunori Miki
- Department of Endovascular Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takanori Yokota
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
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31
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Perridon BW, Leuvenink HGD, Hillebrands JL, van Goor H, Bos EM. The role of hydrogen sulfide in aging and age-related pathologies. Aging (Albany NY) 2017; 8:2264-2289. [PMID: 27683311 PMCID: PMC5115888 DOI: 10.18632/aging.101026] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 09/13/2016] [Indexed: 12/14/2022]
Abstract
When humans grow older, they experience inevitable and progressive loss of physiological function, ultimately leading to death. Research on aging largely focuses on the identification of mechanisms involved in the aging process. Several proposed aging theories were recently combined as the 'hallmarks of aging'. These hallmarks describe (patho-)physiological processes that together, when disrupted, determine the aging phenotype. Sustaining evidence shows a potential role for hydrogen sulfide (H2S) in the regulation of aging. Nowadays, H2S is acknowledged as an endogenously produced signaling molecule with various (patho-) physiological effects. H2S is involved in several diseases including pathologies related to aging. In this review, the known, assumed and hypothetical effects of hydrogen sulfide on the aging process will be discussed by reviewing its actions on the hallmarks of aging and on several age-related pathologies.
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Affiliation(s)
- Bernard W Perridon
- Department of Pathology and Medical Biology, University Medical Center Groningen, the Netherlands
| | | | - Jan-Luuk Hillebrands
- Department of Pathology and Medical Biology, University Medical Center Groningen, the Netherlands
| | - Harry van Goor
- Department of Pathology and Medical Biology, University Medical Center Groningen, the Netherlands
| | - Eelke M Bos
- Department of Pathology and Medical Biology, University Medical Center Groningen, the Netherlands.,Department of Neurosurgery, Erasmus Medical Center Rotterdam, the Netherlands
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32
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Zhu H, Chen Z, Ma Z, Tan H, Xiao C, Tang X, Zhang B, Wang Y, Gao Y. Tanshinone IIA Protects Endothelial Cells from H₂O₂-Induced Injuries via PXR Activation. Biomol Ther (Seoul) 2017; 25:599-608. [PMID: 28173640 PMCID: PMC5685429 DOI: 10.4062/biomolther.2016.179] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/08/2016] [Accepted: 11/03/2016] [Indexed: 01/11/2023] Open
Abstract
Tanshinone IIA (Tan IIA) is a pharmacologically active substance extracted from the rhizome of Salvia miltiorrhiza Bunge (also known as the Chinese herb Danshen), and is widely used to treat atherosclerosis. The pregnane X receptor (PXR) is a nuclear receptor that is a key regulator of xenobiotic and endobiotic detoxification. Tan IIA is an efficacious PXR agonist that has a potential protective effect on endothelial injuries induced by xenobiotics and endobiotics via PXR activation. Previously numerous studies have demonstrated the possible effects of Tan IIA on human umbilical vein endothelial cells, but the further mechanism for its exerts the protective effect is not well established. To study the protective effects of Tan IIA against hydrogen peroxide (H2O2) in human umbilical vein endothelial cells (HUVECs), we pretreated cells with or without different concentrations of Tan IIA for 24 h, then exposed the cells to 400 μM H2O2 for another 3 h. Therefore, our data strongly suggests that Tan IIA may lead to increased regeneration of glutathione (GSH) from the glutathione disulfide (GSSG) produced during the GSH peroxidase-catalyzed decomposition of H2O2 in HUVECs, and the PXR plays a significant role in this process. Tan IIA may also exert protective effects against H2O2-induced apoptosis through the mitochondrial apoptosis pathway associated with the participation of PXR. Tan IIA protected HUVECs from inflammatory mediators triggered by H2O2 via PXR activation. In conclusion, Tan IIA protected HUVECs against H2O2-induced cell injury through PXR-dependent mechanisms.
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Affiliation(s)
- Haiyan Zhu
- Department of Pharmacology, Anhui Medical University, Hefei 230032, China.,Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Zhiwu Chen
- Department of Pharmacology, Anhui Medical University, Hefei 230032, China
| | - Zengchun Ma
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Hongling Tan
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Chengrong Xiao
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Xianglin Tang
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Boli Zhang
- Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Yuguang Wang
- Department of Pharmacology, Anhui Medical University, Hefei 230032, China.,Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Yue Gao
- Department of Pharmacology, Anhui Medical University, Hefei 230032, China.,Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
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33
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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: 278] [Impact Index Per Article: 39.7] [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.
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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.)
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34
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Sirtuin 6 protects the brain from cerebral ischemia/reperfusion injury through NRF2 activation. Neuroscience 2017; 366:95-104. [PMID: 28951325 DOI: 10.1016/j.neuroscience.2017.09.035] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 09/13/2017] [Accepted: 09/18/2017] [Indexed: 01/01/2023]
Abstract
Sirtuin 6 (SIRT6), a member of the sirtuin family of NAD(+)-dependent deacetylases, has been shown to produce beneficial effects in myocardial ischemia/reperfusion (I/R). However, the role of SIRT6 in cerebral I/R is largely unclear. In this study, we investigated the effects of SIRT6 overexpression in regulating I/R injury in a mouse cerebral I/R model in vivo and in oxygen-glucose-deprivation/reoxygenation (OGD/R)-stimulated neuro-2a neuroblastoma cells in vitro. We found that cerebral I/R (1 h/24 h) resulted in decreased SIRT6 expression in the cerebral cortex (P < 0.01). SIRT6 overexpression in the brain by in vivo gene transfer enhanced the antioxidant NRF2 signaling (P < 0.05), reduced oxidative stress (P < 0.05), and attenuated cerebral I/R-induced brain tissue damage and neurological deficits (P < 0.05). These neuroprotective effects of SIRT6 overexpression were abolished in NRF2 knockout mice. In neuro-2A neuroblastoma cells, SIRT6 overexpression increased total and nuclear NRF2 levels (P < 0.05), reduced oxidative stress (P < 0.05), and attenuated OGD/R-induced cell death (P < 0.05); these protective effects were blocked by NRF2 knockdown (P < 0.05). Moreover, in OGD/R-stimulated neuro-2A cells, SIRT6 overexpression produced similar protective effects to those induced by the antioxidant NAC, but no added benefits were detected when SIRT6 overexpression was used in combination with NAC (P > 0.05). These findings provide evidence that SIRT6 can protect the brain from cerebral I/R injury by suppressing oxidative stress via NRF2 activation. Thus, SIRT6 may serve as a potential therapeutic target for ischemic stroke.
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35
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Ku JM, Taher M, Chin KY, Grace M, McIntyre P, Miller AA. Characterisation of a mouse cerebral microvascular endothelial cell line (bEnd.3) after oxygen glucose deprivation and reoxygenation. Clin Exp Pharmacol Physiol 2017; 43:777-86. [PMID: 27128638 DOI: 10.1111/1440-1681.12587] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 04/17/2016] [Accepted: 04/26/2016] [Indexed: 11/29/2022]
Abstract
Studies have utilised immortalised mouse cerebral endothelial cells (bEnd.3) exposed to oxygen glucose deprivation (OGD) to study blood-brain barrier (BBB) disruption after ischaemia. However, there is a paucity of literature describing the duration of OGD (and reoxygenation [RO]) required to best simulate BBB disruption in vivo. In this study we assessed BBB disruption in bEnd.3 cells after exposure to a range of OGD periods, and also after OGD + RO. Exposure of bEnd.3 monolayers to 4, 6, 16, or 24 hours of OGD resulted in a significant increase in permeability. The hyperpermeability after 16 or 24 hours was associated with decreased expression of tight junction proteins (occludin and claudin-5). Furthermore, there was a decrease in cell viability and increased expression of the pro-apoptotic protein, cleaved caspase-3. Exposure of bEnd.3 monolayers to 1 hour OGD+ 23 hours RO exacerbated hyperpermeability relative to 1 hour OGD, which was associated with decreased expression levels of occludin and ZO-1, but no change in cell viability or caspase-3. 4 hours OGD + 23 hours RO exacerbated hyperpermeability, decreased expression levels of tight junction proteins, decreased cell viability, and increased caspase-3 expression. Thus, bEnd.3 cells exhibit hyperpermeability, a loss of tight junction proteins, and undergo cell death, after exposure to prolonged periods of OGD. Moreover, they exhibit exacerbated hyperpermeability, a loss of tight junction proteins, and increased expression of caspase-3 after OGD + RO. These findings will facilitate the use of this cell line in studies of BBB disruption and for the testing of therapeutics.
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Affiliation(s)
- Jacqueline M Ku
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
| | - Mohammadali Taher
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
| | - Kai Yee Chin
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
| | - Megan Grace
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
| | - Peter McIntyre
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
| | - Alyson A Miller
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, Victoria, Australia
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36
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She DT, Jo DG, Arumugam TV. Emerging Roles of Sirtuins in Ischemic Stroke. Transl Stroke Res 2017; 8:10.1007/s12975-017-0544-4. [PMID: 28656393 DOI: 10.1007/s12975-017-0544-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 12/13/2022]
Abstract
Ischemic stroke is one of the leading causes of death worldwide. It is characterized by a sudden disruption of blood flow to the brain causing cell death and damage, which will lead to neurological impairments. In the current state, only one drug is approved to be used in clinical setting and new therapies that confer ischemic neuroprotection are desperately needed. Several targets and pathways have been indicated to be neuroprotective in ischemic stroke, among which the sirtuin family of nicotinamide adenine dinucleotide (NAD+)-dependent deacetylases has emerged as important modulators of several processes in the normal physiology and pathological conditions such as stroke. Recent studies have identified some members of the sirtuin family are able to ameliorate the devastating consequences of ischemic stroke by conferring neuroprotection by means of reducing neuronal cell death, oxidative stress, and neuroinflammation whereas some sirtuins are found to be detrimental in the pathophysiology of ischemic stroke. This review summarizes implications of sirtuins in ischemic stroke and the experimental evidences that demonstrate the potential of sirtuin modulators as neuroprotective therapy for ischemic stroke.
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Affiliation(s)
- David T She
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, Singapore, 117456, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.
- Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, Singapore, 117456, Singapore.
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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37
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Affiliation(s)
- Bor L Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University Health SystemSingapore, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of SingaporeSingapore, Singapore
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Functional and Molecular Insights of Hydrogen Sulfide Signaling and Protein Sulfhydration. J Mol Biol 2016; 429:543-561. [PMID: 28013031 DOI: 10.1016/j.jmb.2016.12.015] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/08/2016] [Accepted: 12/12/2016] [Indexed: 12/23/2022]
Abstract
Hydrogen sulfide (H2S), a novel gasotransmitter, is endogenously synthesized by multiple enzymes that are differentially expressed in the peripheral tissues and central nervous systems. H2S regulates a wide range of physiological processes, namely cardiovascular, neuronal, immune, respiratory, gastrointestinal, liver, and endocrine systems, by influencing cellular signaling pathways and sulfhydration of target proteins. This review focuses on the recent progress made in H2S signaling that affects mechanistic and functional aspects of several biological processes such as autophagy, inflammation, proliferation and differentiation of stem cell, cell survival/death, and cellular metabolism under both physiological and pathological conditions. Moreover, we highlighted the cross-talk between nitric oxide and H2S in several bilogical contexts.
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Wang M, Hu Y, Fan Y, Guo Y, Chen F, Chen S, Li Q, Chen Z. Involvement of Hydrogen Sulfide in Endothelium-Derived Relaxing Factor-Mediated Responses in Rat Cerebral Arteries. J Vasc Res 2016; 53:172-185. [DOI: 10.1159/000448712] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 07/26/2016] [Indexed: 11/19/2022] Open
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Mitochondrial function in hypoxic ischemic injury and influence of aging. Prog Neurobiol 2016; 157:92-116. [PMID: 27321753 DOI: 10.1016/j.pneurobio.2016.06.006] [Citation(s) in RCA: 242] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 03/30/2016] [Accepted: 06/12/2016] [Indexed: 12/11/2022]
Abstract
Mitochondria are a major target in hypoxic/ischemic injury. Mitochondrial impairment increases with age leading to dysregulation of molecular pathways linked to mitochondria. The perturbation of mitochondrial homeostasis and cellular energetics worsens outcome following hypoxic-ischemic insults in elderly individuals. In response to acute injury conditions, cellular machinery relies on rapid adaptations by modulating posttranslational modifications. Therefore, post-translational regulation of molecular mediators such as hypoxia-inducible factor 1α (HIF-1α), peroxisome proliferator-activated receptor γ coactivator α (PGC-1α), c-MYC, SIRT1 and AMPK play a critical role in the control of the glycolytic-mitochondrial energy axis in response to hypoxic-ischemic conditions. The deficiency of oxygen and nutrients leads to decreased energetic reliance on mitochondria, promoting glycolysis. The combination of pseudohypoxia, declining autophagy, and dysregulation of stress responses with aging adds to impaired host response to hypoxic-ischemic injury. Furthermore, intermitochondrial signal propagation and tissue wide oscillations in mitochondrial metabolism in response to oxidative stress are emerging as vital to cellular energetics. Recently reported intercellular transport of mitochondria through tunneling nanotubes also play a role in the response to and treatments for ischemic injury. In this review we attempt to provide an overview of some of the molecular mechanisms and potential therapies involved in the alteration of cellular energetics with aging and injury with a neurobiological perspective.
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Shen J, Zhu Y, Huang K, Jiang H, Shi C, Xiong X, Zhan R, Pan J. Buyang Huanwu Decoction attenuates H2O2-induced apoptosis by inhibiting reactive oxygen species-mediated mitochondrial dysfunction pathway in human umbilical vein endothelial cells. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 16:154. [PMID: 27245599 PMCID: PMC4886416 DOI: 10.1186/s12906-016-1152-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 05/27/2016] [Indexed: 12/23/2022]
Abstract
Background Apoptosis of endothelial cells caused by reactive oxygen species plays an important role in ischemia/reperfusion injury after cerebral infarction. Buyang Huanwu Decoction (BYHWD) has been used to treat stroke and stroke-induced disability, however, the mechanism for this treatment remains unknown. In this study, we investigated whether BYHWD can protect human umbilical vein endothelial cells (HUVECs) from H2O2-induced apoptosis and explored the underlying mechanisms. Methods To investigate the effect of BYHWD on the apoptosis of HUVECs, we established a H2O2-induced oxidative stress model and detected apoptosis by Hoechst 33342 and propidium iodide staining. JC-1 and DCFH-DA assays,western blotting and electron microscopy were used to examine the mechanism of BYHWD on apoptosis. Results Pretreatment with BYHWD significantly inhibited H2O2-induced apoptosis and protein caspase-3 expression in a concentration-dependent manner. In addition, BYHWD reduced reactive oxygen species production and promoted endogenous antioxidant defenses. Furthermore, loss of mitochondrial membrane potential and structural disruption of mitochondria were both rescued by BYHWD. Conclusions BYHWD protects HUVECs from H2O2-induced apoptosis by inhibiting oxidative stress damage and mitochondrial dysfunction. These findings indicate that BYHWD is a promising treatment for cerebral ischemia diseases.
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Xie L, Feng H, Li S, Meng G, Liu S, Tang X, Ma Y, Han Y, Xiao Y, Gu Y, Shao Y, Park CM, Xian M, Huang Y, Ferro A, Wang R, Moore PK, Wang H, Ji Y. SIRT3 Mediates the Antioxidant Effect of Hydrogen Sulfide in Endothelial Cells. Antioxid Redox Signal 2016; 24:329-43. [PMID: 26422756 PMCID: PMC4761821 DOI: 10.1089/ars.2015.6331] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AIM Oxidative stress is a key contributor to endothelial dysfunction and associated cardiovascular pathogenesis. Hydrogen sulfide (H2S) is an antioxidant gasotransmitter that protects endothelial cells against oxidative stress. Sirtuin3 (SIRT3), which belongs to the silent information regulator 2 (SIR2) family, is an important deacetylase under oxidative stress. H2S is able to regulate the activity of several sirtuins. The present study aims to investigate the role of SIRT3 in the antioxidant effect of H2S in endothelial cells. RESULTS Cultured EA.hy926 endothelial cells were exposed to hydrogen peroxide (H2O2) as a model of oxidative stress-induced cell injury. GYY4137, a slow-releasing H2S donor, improved cell viability, reduced oxidative stress and apoptosis, and improved mitochondrial function following H2O2 treatment. H2S reversed the stimulation of MAPK phosphorylation, downregulation of SIRT3 mRNA and reduction of the superoxide dismutase 2 and isocitrate dehydrogenase 2 expression which were induced by H2O2. H2S also increased activator protein 1 (AP-1) binding activity with SIRT3 promoter and this effect was absent in the presence of the specific AP-1 inhibitor, SR11302 or curcumin. Paraquat administration to mice induced a defected endothelium-dependent aortic vasodilatation and increased oxidative stress in both mouse aorta and small mesenteric artery, which were alleviated by GYY4137 treatment. This vasoprotective effect of H2S was absent in SIRT3 knockout mice. INNOVATION The present results highlight a novel role for SIRT3 in the protective effect of H2S against oxidant damage in the endothelium both in vitro and in vivo. CONCLUSION H2S enhances AP-1 binding activity with the SIRT3 promoter, thereby upregulating SIRT3 expression and ultimately reducing oxidant-provoked vascular endothelial dysfunction. Antioxid. Redox Signal. 24, 329-343.
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Affiliation(s)
- Liping Xie
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Haihua Feng
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Sha Li
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Guoliang Meng
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China .,2 Department of Pharmacology, School of Pharmacy, Nantong University , Nantong, China
| | - Shangmin Liu
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Xin Tang
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Yan Ma
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Yi Han
- 3 Department of Geriatrics, the First Affiliated Hospital of Nanjing Medical University , Nanjing, China
| | - Yujiao Xiao
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Yue Gu
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
| | - Yongfeng Shao
- 4 Department of Cardiothoracic Surgery, the First Affiliated Hospital of Nanjing Medical University , Nanjing, China
| | - Chung-Min Park
- 5 Department of Chemistry, Washington State University , Pullman, Washington
| | - Ming Xian
- 5 Department of Chemistry, Washington State University , Pullman, Washington
| | - Yu Huang
- 6 Institute of Vascular Biology, Chinese University of Hong Kong , Hong Kong, China
| | - Albert Ferro
- 7 Cardiovascular Division, Department of Clinical Pharmacology, School of Medicine, King's College London , London, United Kingdom
| | - Rui Wang
- 8 Department of Biology, Cardivascular and Molecular Research Unit, Lakehead University , Thunder Bay, Ontario, Canada
| | - Philip K Moore
- 9 Department of Pharmacology, National University of Singapore , Singapore
| | - Hong Wang
- 10 Department of Pharmacology, Center for Metabolic Disease Research, Temple University School of Medicine , Philadelphia, Pennsylvania
| | - Yong Ji
- 1 Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University , Nanjing, China
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The H2S Donor NaHS Changes the Expression Pattern of H2S-Producing Enzymes after Myocardial Infarction. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6492469. [PMID: 27057284 PMCID: PMC4736414 DOI: 10.1155/2016/6492469] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/09/2015] [Accepted: 11/30/2015] [Indexed: 12/26/2022]
Abstract
Aims. To examine the expression patterns of hydrogen sulphide- (H2S-) producing enzymes in ischaemic heart tissue and plasma levels of H2S after 2 weeks of NaHS treatment after myocardial infarction (MI) and to clarify the role of endogenous H2S in the MI process. Results. After MI surgery, 2 weeks of treatment with the H2S donor NaHS alleviated ischaemic injury. Meanwhile, in ischemia myocardium, three H2S-producing enzymes, cystathionine γ-lyase (CSE), cystathionine-β-synthase (CBS), and 3-mercaptopyruvate sulfurtransferase (3-MST) significantly increased. Plasma H2S levels were also elevated. In vitro, NaHS treatment protected cardiomyocytes from hypoxic injury and raised CBS levels in a concentration-dependent manner. Different from in vivo results, however, CSE or 3-MST expression did not change. NaHS treatment increased the activity of CSE/CBS but not of 3-MST. When CSE was either knocked down (in vitro) or knocked out (in vivo), H2S levels significantly decreased, which subsequently exacerbated the ischaemic injury. Meanwhile, the expressions of CBS and 3-MST increased due to compensation. Conclusions. Exogenous H2S treatment changed the expressions of three H2S-producing enzymes and H2S levels after MI, suggesting a new and indirect regulatory mechanism for H2S production and its contribution to cardiac protection. Endogenous H2S plays an important role in protecting ischaemic tissue after MI.
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Wang P, Miao CY. NAMPT as a Therapeutic Target against Stroke. Trends Pharmacol Sci 2015; 36:891-905. [DOI: 10.1016/j.tips.2015.08.012] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 08/20/2015] [Accepted: 08/20/2015] [Indexed: 12/20/2022]
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Multifactorial processes to slowing the biological clock: Insights from a comparative approach. Exp Gerontol 2015; 71:27-37. [DOI: 10.1016/j.exger.2015.08.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 08/20/2015] [Accepted: 08/29/2015] [Indexed: 02/07/2023]
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