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Wang Z, Zhou W, Zhang Z, Zhang L, Li M. Metformin alleviates spinal cord injury by inhibiting nerve cell ferroptosis through upregulation of heme oxygenase-1 expression. Neural Regen Res 2024; 19:2041-2049. [PMID: 38227534 DOI: 10.4103/1673-5374.390960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 10/18/2023] [Indexed: 01/17/2024] Open
Abstract
JOURNAL/nrgr/04.03/01300535-202409000-00037/figure1/v/2024-01-16T170235Z/r/image-tiff Previous studies have reported upregulation of heme oxygenase-1 in different central nervous system injury models. Heme oxygenase-1 plays a critical anti-inflammatory role and is essential for regulating cellular redox homeostasis. Metformin is a classic drug used to treat type 2 diabetes that can inhibit ferroptosis. Previous studies have shown that, when used to treat cardiovascular and digestive system diseases, metformin can also upregulate heme oxygenase-1 expression. Therefore, we hypothesized that heme oxygenase-1 plays a significant role in mediating the beneficial effects of metformin on neuronal ferroptosis after spinal cord injury. To test this, we first performed a bioinformatics analysis based on the GEO database and found that heme oxygenase-1 was upregulated in the lesion of rats with spinal cord injury. Next, we confirmed this finding in a rat model of T9 spinal cord compression injury that exhibited spinal cord nerve cell ferroptosis. Continuous intraperitoneal injection of metformin for 14 days was found to both upregulate heme oxygenase-1 expression and reduce neuronal ferroptosis in rats with spinal cord injury. Subsequently, we used a lentivirus vector to knock down heme oxygenase-1 expression in the spinal cord, and found that this significantly reduced the effect of metformin on ferroptosis after spinal cord injury. Taken together, these findings suggest that metformin inhibits neuronal ferroptosis after spinal cord injury, and that this effect is partially dependent on upregulation of heme oxygenase-1.
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Affiliation(s)
- Zhihua Wang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
- Postdoctoral Innovation Practice Base, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Wu Zhou
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Zhixiong Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Lulu Zhang
- Department of Nephrology, Nanchang People's Hospital Affiliated to Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Meihua Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
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Xi ZC, Ren HG, Ai L, Wang Y, Liu MF, Qiu YF, Feng JL, Fu W, Bi QQ, Wang F, Xu HX. Ginsenoside Rg1 mitigates cerebral ischaemia/reperfusion injury in mice by inhibiting autophagy through activation of mTOR signalling. Acta Pharmacol Sin 2024:10.1038/s41401-024-01334-4. [PMID: 38937576 DOI: 10.1038/s41401-024-01334-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 06/03/2024] [Indexed: 06/29/2024] Open
Abstract
Reperfusion injury, which is distinct from ischaemic injury, occurs when blood flow is restored in previously ischaemic brain tissue, further compromising neurons and other cells and worsening the injury. There is currently a lack of pharmaceutical agents and therapeutic interventions that specifically mitigate cerebral ischaemia/reperfusion (I/R) injury. Ginsenoside Rg1 (Rg1), a protopanaxatriol-type saponin isolated from Panax ginseng C. A. Meyer, has been found to protect against cerebral I/R injury, but its intricate protective mechanisms remain to be elucidated. Numerous studies have shown that autophagy plays a crucial role in protecting brain tissue during the I/R process and is emerging as a promising therapeutic strategy for effective treatment. In this study, we investigated whether Rg1 protected against I/R damage in vitro and in vivo by regulating autophagy. Both MCAO and OGD/R models were established. SK-N-AS and SH-SY5Y cells were subjected to OGD followed by reperfusion with Rg1 (4-32 μM). MCAO mice were injected with Rg1 (30 mg·kg-1·d-1. i.p.) for 3 days before and on the day of surgery. Rg1 treatment significantly mitigated ischaemia/reperfusion injury both in vitro and in vivo. Furthermore, we demonstrated that the induction of autophagy contributed to I/R injury, which was effectively inhibited by Rg1 in both in vitro and in vivo models of cerebral I/R injury. Rg1 inhibited autophagy through multiple steps, including impeding autophagy initiation, inducing lysosomal dysfunction and inhibiting cathepsin enzyme activities. We revealed that mTOR activation was pivotal in mediating the inhibitory effect of Rg1 on autophagy. Treatment with Torin-1, an autophagy inducer and mTOR-specific inhibitor, significantly reversed the impact of Rg1 on autophagy, decreasing its protective efficacy against I/R injury both in vitro and in vivo. In conclusion, our results suggest that Rg1 may serve as a promising drug candidate against cerebral I/R injury by inhibiting autophagy through activation of mTOR signalling.
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Affiliation(s)
- Zhi-Chao Xi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, China
| | - Han-Gui Ren
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, China
| | - Lin Ai
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China
| | - Yuan Wang
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China
| | - Meng-Fan Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, China
| | - Yu-Fei Qiu
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China
| | - Ji-Ling Feng
- Precision Research Center for Refractory Diseases, Institute for Clinical Research, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201620, China
| | - Wang Fu
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China
| | - Qian-Qian Bi
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China
| | - Feng Wang
- Department of Neurology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China.
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, China.
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He R, Xu Y, Liu J, Liu J, Chen J, Wang X, Qiu L, Huang J. Compound Shenma Jingfu granule alleviates cerebral ischemia via HIF-1α-mediated promotion of angiogenesis. Chin Med 2024; 19:62. [PMID: 38600597 PMCID: PMC11005288 DOI: 10.1186/s13020-024-00926-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/26/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND Shenma Jingfu Granule, a traditional Chinese medicine formula, has been used clinically for the treatment of cerebral circulation insufficiency. However, the mechanism involved in alleviating cerebral ischemia has not yet been fully elucidated. METHODS An integrated approach involving network pharmacology and transcriptomics was utilized to clarify the potential mechanisms of SMJF Granule. Molecular docking and surface plasmon resonance (SPR) were employed to identify potential targets and ingredients of SMJF Granule. The anti-CI effect of SMJF Granule was determined on the middle cerebral artery occlusion (MCAO) model by using hematoxylin-eosin (H&E) and Nissl's staining, as well as triphenyl tetrazolium chloride (TTC) staining, and the potential targets involved in the mechanisms were validated by RT-qPCR and western blotting. RESULTS Integrated analysis revealed the mechanism of SMJF Granule intervening in CI injury might be related to the HIF-1 signaling pathway and angiogenesis. Molecular docking and SPR assays demonstrated robust binding interactions between key compounds like salvianolic acid A and naringenin with the core target HIF-1α protein. The experiment confirmed that SMJF Granule lowered neurological scores, diminished infarct volume, and alleviated histopathological changes in vivo. The possible mechanism of SMJF Granule was due to regulating HIF-1 pathway, which contributed to up-regulating expression of VEGF and vWF in the penumbral region, showing a significant promotion of angiogenesis. CONCLUSION SMJF Granule promoted angiogenesis through HIF-1α pathway, thereby alleviating cerebral ischemia injury. In addition, our findings provide some evidence that SMJF Granule is a candidate compound for further investigation in treating CI in the clinical.
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Affiliation(s)
- Ruihua He
- Department of Pharmacy, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200083, China
| | - Yi Xu
- Department of Pharmacy, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200083, China
| | - Jingxue Liu
- Department of Pharmacy, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Jing Liu
- Department of Pharmacy, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200083, China
| | - Jing Chen
- Department of Pharmacy, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200083, China
| | - Xufang Wang
- College of Pharmacy, Navy Medical University, Shanghai, 200433, China
| | - Lei Qiu
- College of Pharmacy, Navy Medical University, Shanghai, 200433, China.
| | - Jin Huang
- Department of Pharmacy, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200083, China.
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4
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Yu H, Wang J, Liu M, Hu C, Sun J, Xu B, Lu S, Huang D, Pang Q, Hu C. Metformin alleviates lung ischemia-reperfusion injury in a rat lung transplantation model. Exp Lung Res 2024; 50:15-24. [PMID: 38317565 DOI: 10.1080/01902148.2023.2301615] [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: 02/24/2023] [Accepted: 12/28/2023] [Indexed: 02/07/2024]
Abstract
Background: Lung ischemia-reperfusion injury (LIRI) is among the complications observed after lung transplantation and is associated with morbidity and mortality. Preconditioning of the donor lung before organ retrieval may improve organ quality after transplantation. We investigated whether preconditioning with metformin (Met) ameliorates LIRI after lung transplantation. Methods: Twenty Lewis rats were randomly divided into the sham, LIRI, and Met groups. The rats in the LIRI and Met groups received saline and Met, respectively, via oral gavage. Subsequently, a donor lung was harvested and kept in cold storage for 8 h. The LIRI and Met groups then underwent left lung transplantation. After 2 h of reperfusion, serum and transplanted lung tissues were examined. Results: The partial pressure of oxygen (PaO2) was greater in the Met group than in the LIRI group. In the Met group, wet-to-dry (W/D) weight ratios, inflammatory factor levels, oxidative stress levels and apoptosis levels were notably decreased. Conclusions: Met protects against ischemia-reperfusion injury after lung transplantation in rats, and its therapeutic effect is associated with its anti-inflammatory, antioxidative, and antiapoptotic properties.
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Affiliation(s)
- Huizhi Yu
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
- Department of Anesthesiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Jing Wang
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Mingzhao Liu
- Department of Lung Transplant Center, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Chunlan Hu
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Jiaojiao Sun
- Department of Physiopathology, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
| | - Bo Xu
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Shunmei Lu
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Dongxiao Huang
- Department of Anesthesiology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu, China
| | - Qingfeng Pang
- Department of Physiopathology, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
| | - Chunxiao Hu
- Department of Transplant Anesthesiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, Jiangsu, China
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Huang S, Hou D, Zhang L, Pei C, Liang J, Li J, Yang G, Yu D. LncRNA MALAT1 Promoted Neuronal Necroptosis in Cerebral Ischemia-reperfusion Mice by Stabilizing HSP90. Neurochem Res 2023; 48:3457-3471. [PMID: 37470906 DOI: 10.1007/s11064-023-03991-z] [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: 12/09/2022] [Revised: 07/03/2023] [Accepted: 07/09/2023] [Indexed: 07/21/2023]
Abstract
The objective of this research was to investigate the role of lncRNA MALAT1 and HSP90 in the regulation of neuronal necroptosis in mice with cerebral ischemia-reperfusion (CIR). We used male C57BL/6J mice to establish a middle cerebral artery occlusion (MCAO) model and conducted in vitro experiments using the HT-22 mouse hippocampal neuron cell line. The cellular localization of NeuN and MLKL, as well as the expression levels of neuronal necroptosis factors, MALAT1, and HSP90 were analyzed. Cell viability and necroptosis were assessed, and we also investigated the relationship between MALAT1 and HSP90. The results showed that MALAT1 expression increased after MCAO and oxygen-glucose deprivation/re-oxygenation (OGD/R) treatment in both cerebral tissues and cells compared with the control group. The levels of neuronal necroptosis factors and the co-localization of NeuN and MLKL were also increased in MCAO mice compared with the Sham group. MALAT1 was found to interact with HSP90, and inhibition of HSP90 expression led to decreased phosphorylation levels of neuronal necroptosis factors. Inhibition of MALAT1 expression resulted in decreased co-localization levels of NeuN and MLKL, decreased phosphorylation levels of neuronal necroptosis factors, and reduced necroptosis rate in cerebral tissues. Furthermore, inhibiting MALAT1 expression also led to a shorter half-life of HSP90, increased ubiquitination level, and decreased phosphorylation levels of neuronal necroptosis factors in cells. In conclusion, this study demonstrated that lncRNA MALAT1 promotes neuronal necroptosis in CIR mice by stabilizing HSP90.
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Affiliation(s)
- Shan Huang
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China
| | - Dan Hou
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China
| | - Lei Zhang
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China
| | - Chaoying Pei
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China
| | - Ji Liang
- Department of Neurology, The First People's Hospital of Changde, Changde, 415000, Hunan, China
| | - Junqi Li
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China
| | - Guoshuai Yang
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China.
| | - Dan Yu
- Department of Neurology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, No. 43 Renmin Avenue, Haikou, 570208, Hainan, China.
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6
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Li Y, Liu C, Han G. Research progress of odontogenic extracellular vesicles in regeneration of dental pulp. Oral Dis 2023; 29:2565-2577. [PMID: 36415913 DOI: 10.1111/odi.14451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/26/2022] [Accepted: 11/15/2022] [Indexed: 11/24/2022]
Abstract
It is well understood that maintaining viable pulp is critical for tooth retention. This review focused on cell-free therapy based on extracellular vesicles (EVs), a novel minimally invasive treatment strategy for endodontic restoration. This study was conducted by searching mainstream electronic databases such as Web of Science and PubMed for relevant studies on the therapeutic role of odontogenic EVs in pulp healing published in the last five years. We selected 89 relevant articles and discovered that dental stem cells (DSCs) derived EVs (DSC-EVs) have become a research hotspot in oral regenerative medicine, with significant advantages over cell transplantation in terms of low immunogenicity, ease of isolation, preservation, and management. Here, we introduce in detail the therapeutic effects of DSC-EVs for pulp restoration from three perspectives: excellent odontogenic properties, clinical applications, and possible molecular mechanisms. This article contributes a new viewpoint to the field of regenerative endodontics.
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Affiliation(s)
- Yanan Li
- Department of Oral Geriatrics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Chaoran Liu
- Department of Oral Geriatrics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Guanghong Han
- Department of Oral Geriatrics, Hospital of Stomatology, Jilin University, Changchun, China
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7
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Guo Y, Jiang H, Wang M, Ma Y, Zhang J, Jing L. Metformin alleviates cerebral ischemia/reperfusion injury aggravated by hyperglycemia via regulating AMPK/ULK1/PINK1/Parkin pathway-mediated mitophagy and apoptosis. Chem Biol Interact 2023; 384:110723. [PMID: 37741536 DOI: 10.1016/j.cbi.2023.110723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 09/25/2023]
Abstract
Stroke remains the main leading cause of death and disabilities worldwide, with diabetes mellitus being a significant independent risk factor for it. Metformin, as an efficient hypoglycemic drug in treating type 2 diabetes, has been reported to alleviate the risk of diabetes-related stroke. However, its underlying mechanisms remain unclear. This study aimed to investigate the role of mitophagy and its regulatory pathway in the neuroprotective mechanism of metformin against cerebral ischemia/reperfusion (I/R) injury aggravated by hyperglycemia. A hyperglycemic cerebral I/R animal model and a high glucose cultured oxygen-glucose deprivation/reperfusion (OGD/R) cell model were used in the experiment. The indexes of brain injury, cell activity, mitochondrial morphology and function, mitophagy, mitochondrial pathway apoptosis and the AMPK pathway were observed. In diabetic rats, metformin treatment decreased cerebral infarction volume and neuronal apoptosis, and improved neurological symptoms following I/R injury. Additionally, metformin induced activation of the AMPK/ULK1/PINK1/Parkin mitophagy pathway to have neuroprotective effects. In vitro, high glucose culture and OGD/R treatment impaired mitochondrial morphology and function, mitochondrial membrane potential, and induced apoptosis. However, metformin activated AMPK/ULK1/PINK1/Parkin mitophagy pathway, normalized mitochondrial injury. This protection was reversed by autophagy inhibitor 3-methyladenine (3MA) and AMPK inhibitor compound C. In conclusion, our present study validates the potential mechanism of metformin in alleviating hyperglycemia aggravated cerebral I/R injury by the activation of AMPK/ULK1/PINK1/Parkin mitophagy pathway.
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Affiliation(s)
- Yaqi Guo
- Department of Pathology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, Ningxia, China; Clinical Laboratory Center, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Haifeng Jiang
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Meng Wang
- Department of Pathology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Yanmei Ma
- Department of Pathology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Jianzhong Zhang
- Department of Pathology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Li Jing
- Department of Pathology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, Ningxia, China.
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8
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Zheng T, Jiang T, Huang Z, Ma H, Wang M. Role of traditional Chinese medicine monomers in cerebral ischemia/reperfusion injury:a review of the mechanism. Front Pharmacol 2023; 14:1220862. [PMID: 37654609 PMCID: PMC10467294 DOI: 10.3389/fphar.2023.1220862] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 08/04/2023] [Indexed: 09/02/2023] Open
Abstract
Ischemia/reperfusion (I/R) injury is a pathological process wherein reperfusion of an ischemic organ or tissue exacerbates the injury, posing a significant health threat and economic burden to patients and their families. I/R triggers a multitude of physiological and pathological events, such as inflammatory responses, oxidative stress, neuronal cell death, and disruption of the blood-brain barrier (BBB). Hence, the development of effective therapeutic strategies targeting the pathological processes resulting from I/R is crucial for the rehabilitation and long-term enhancement of the quality of life in patients with cerebral ischemia/reperfusion injury (CIRI). Traditional Chinese medicine (TCM) monomers refer to bioactive compounds extracted from Chinese herbal medicine, possessing anti-inflammatory and antioxidative effects, and the ability to modulate programmed cell death (PCD). TCM monomers have emerged as promising candidates for the treatment of CIRI and its subsequent complications. Preclinical studies have demonstrated that TCM monomers can enhance the recovery of neurological function following CIRI by mitigating oxidative stress, suppressing inflammatory responses, reducing neuronal cell death and functional impairment, as well as minimizing cerebral infarction volume. The neuroprotective effects of TCM monomers on CIRI have been extensively investigated, and a comprehensive understanding of their mechanisms can pave the way for novel approaches to I/R treatment. This review aims to update and summarize evidence of the protective effects of TCMs in CIRI, with a focus on their role in modulating oxidative stress, inflammation, PCD, glutamate excitotoxicity, Ca2+ overload, as well as promoting blood-brain barrier repairment and angiogenesis. The main objective is to underscore the significant contribution of TCM monomers in alleviating CIRI.
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Affiliation(s)
| | | | | | | | - Manxia Wang
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
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9
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Moya-Gómez A, Font LP, Burlacu A, Alpizar YA, Cardonne MM, Brône B, Bronckaers A. Extremely Low-Frequency Electromagnetic Stimulation (ELF-EMS) Improves Neurological Outcome and Reduces Microglial Reactivity in a Rodent Model of Global Transient Stroke. Int J Mol Sci 2023; 24:11117. [PMID: 37446295 DOI: 10.3390/ijms241311117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/15/2023] Open
Abstract
Extremely low-frequency electromagnetic stimulation (ELF-EMS) was demonstrated to be significantly beneficial in rodent models of permanent stroke. The mechanism involved enhanced cerebrovascular perfusion and endothelial cell nitric oxide production. However, the possible effect on the neuroinflammatory response and its efficacy in reperfusion stroke models remains unclear. To evaluate ELF-EMS effectiveness and possible immunomodulatory response, we studied neurological outcome, behavior, neuronal survival, and glial reactivity in a rodent model of global transient stroke treated with 13.5 mT/60 Hz. Next, we studied microglial cells migration and, in organotypic hippocampal brain slices, we assessed neuronal survival and microglia reactivity. ELF-EMS improved the neurological score and behavior in the ischemia-reperfusion model. It also improved neuronal survival and decreased glia reactivity in the hippocampus, with microglia showing the first signs of treatment effect. In vitro ELF-EMS decreased (Lipopolysaccharide) LPS and ATP-induced microglia migration in both scratch and transwell assay. Additionally, in hippocampal brain slices, reduced microglial reactivity, improved neuronal survival, and modulation of inflammation-related markers was observed. Our study is the first to show that an EMF treatment has a direct impact on microglial migration. Furthermore, ELF-EMS has beneficial effects in an ischemia/reperfusion model, which indicates that this treatment has clinical potential as a new treatment against ischemic stroke.
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Affiliation(s)
- Amanda Moya-Gómez
- BIOMED, UHasselt, Agoralaan, 3590 Diepenbeek, Belgium
- Biomedical Engineering Department, Facultad de Ingeniería Informática, Telecomunicaciones y Biomédica, Universidad de Oriente, Santiago de Cuba 90 400, Cuba
| | - Lena Pérez Font
- Centro Nacional de Electromagnetismo Aplicado, Universidad de Oriente, Santiago de Cuba 90 400, Cuba
| | | | | | - Miriam Marañón Cardonne
- Biomedical Engineering Department, Facultad de Ingeniería Informática, Telecomunicaciones y Biomédica, Universidad de Oriente, Santiago de Cuba 90 400, Cuba
| | - Bert Brône
- BIOMED, UHasselt, Agoralaan, 3590 Diepenbeek, Belgium
| | - Annelies Bronckaers
- Biomedical Engineering Department, Facultad de Ingeniería Informática, Telecomunicaciones y Biomédica, Universidad de Oriente, Santiago de Cuba 90 400, Cuba
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10
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Zhao JY, Sheng XL, Li CJ, Qin T, He RD, Dai GY, Cao Y, Lu HB, Duan CY, Hu JZ. Metformin promotes angiogenesis and functional recovery in aged mice after spinal cord injury by adenosine monophosphate-activated protein kinase/endothelial nitric oxide synthase pathway. Neural Regen Res 2023; 18:1553-1562. [PMID: 36571362 PMCID: PMC10075126 DOI: 10.4103/1673-5374.360245] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Treatment with metformin can lead to the recovery of pleiotropic biological activities after spinal cord injury. However, its effect on spinal cord injury in aged mice remains unclear. Considering the essential role of angiogenesis during the regeneration process, we hypothesized that metformin activates the adenosine monophosphate-activated protein kinase/endothelial nitric oxide synthase pathway in endothelial cells, thereby promoting microvascular regeneration in aged mice after spinal cord injury. In this study, we established young and aged mouse models of contusive spinal cord injury using a modified Allen method. We found that aging hindered the recovery of neurological function and the formation of blood vessels in the spinal cord. Treatment with metformin promoted spinal cord microvascular endothelial cell migration and blood vessel formation in vitro. Furthermore, intraperitoneal injection of metformin in an in vivo model promoted endothelial cell proliferation and increased the density of new blood vessels in the spinal cord, thereby improving neurological function. The role of metformin was reversed by compound C, an adenosine monophosphate-activated protein kinase inhibitor, both in vivo and in vitro, suggesting that the adenosine monophosphate-activated protein kinase/endothelial nitric oxide synthase pathway likely regulates metformin-mediated angiogenesis after spinal cord injury. These findings suggest that metformin promotes vascular regeneration in the injured spinal cord by activating the adenosine monophosphate-activated protein kinase/endothelial nitric oxide synthase pathway, thereby improving the neurological function of aged mice after spinal cord injury.
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Affiliation(s)
- Jin-Yun Zhao
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Xiao-Long Sheng
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Cheng-Jun Li
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Tian Qin
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Run-Dong He
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Guo-Yu Dai
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Yong Cao
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Hong-Bin Lu
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health; Department of Sports Medicine, Research Centre of Sports Medicine, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Chun-Yue Duan
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
| | - Jian-Zhong Hu
- Department of Spine Surgery and Orthopedics, Xiangya Hospital, Central South University; Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University; Hunan Engineering Research Center of Sports and Health, Changsha, Hunan Province, China
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11
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Li B, Zhang B, Li Z, Li S, Li J, Wang A, Hou J, Xu J, Zhang R. Ginkgolide C attenuates cerebral ischemia/reperfusion-induced inflammatory impairments by suppressing CD40/NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2023; 312:116537. [PMID: 37094696 DOI: 10.1016/j.jep.2023.116537] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/06/2023] [Accepted: 04/19/2023] [Indexed: 05/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ginkgo biloba L. (Ginkgoaceae), a traditional Chinese medicine, has been applied for thousands of years for the treatment of cardio-cerebral vascular diseases in China. It is written in Compendium of Materia Medica that Ginkgo has the property of "dispersing poison", which is now referred to as anti-inflammatory and antioxidant. Ginkgolides are important active ingredients in Ginkgo biloba leaves and ginkgolide injection has been frequently applied in clinical practice for the treatment of ischemic stroke. However, few studies have explored the effect and mechanism of ginkgolide C (GC) with anti-inflammatory activity in cerebral ischemia/reperfusion injury (CI/RI). AIM OF THE STUDY The present study aimed to demonstrate whether GC was capable of attenuating CI/RI. Furthermore, the anti-inflammatory effect of GC in CI/RI was explored around the CD40/NF-κB pathway. MATERIALS AND METHODS In vivo, middle cerebral artery occlusion/reperfusion (MCAO/R) model was established in rats. The neuroprotective effect of GC was assessed by neurological scores, cerebral infarct rate, microvessel ultrastructure, blood-brain barrier (BBB) integrity, brain edema, neutrophil infiltration, and levels of TNF-α, IL-1β, IL-6, ICAM-1, VCAM-1, and iNOS. In vitro, rat brain microvessel endothelial cells (rBMECs) were preincubated in GC before hypoxia/reoxygenation (H/R) culture. The cell viability, levels of CD40, ICAM-1, MMP-9, TNF-α, IL-1β, and IL-6, and activation of NF-κB pathway were examined. In addition, the anti-inflammatory effect of GC was also investigated by silencing CD40 gene in rBMECs. RESULTS GC attenuated CI/RI as demonstrated by decreasing neurological scores, reducing cerebral infarct rate, improving microvessel ultrastructural features, ameliorating BBB disruption, attenuating brain edema, inhibiting MPO activity, and downregulating levels of TNF-α, IL-1β, IL-6, ICAM-1, VCAM-1, and iNOS. Coherently, in rBMECs exposed to H/R GC enhanced cell viability and downregulated levels of ICAM-1, MMP-9, TNF-α, IL-1β, and IL-6. Furthermore, GC suppressed CD40 overexpression and hindered translocation of NF-κB p65 from the cytosol to the nucleus, phosphorylation of IκB-α, and activation of IKK-β in H/R rBMECs. However, GC failed to protect rBMECs from H/R-induced inflammatory impairments and suppress activation of NF-κB pathway when CD40 gene was silenced. CONCLUSIONS GC attenuates cerebral ischemia/reperfusion-induced inflammatory impairments by suppressing CD40/NF-κB pathway, which may provide an available therapeutic drug for CI/RI.
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Affiliation(s)
- Bin Li
- Graduate Department, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, Shandong, China; Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Baoke Zhang
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Zhenyu Li
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Shasha Li
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Jun Li
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Aiwu Wang
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Jinling Hou
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Jiping Xu
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Rui Zhang
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
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12
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Deng Y, Duan R, Ding W, Gu Q, Liu M, Zhou J, Sun J, Zhu J. Astrocyte-derived exosomal nicotinamide phosphoribosyltransferase (Nampt) ameliorates ischemic stroke injury by targeting AMPK/mTOR signaling to induce autophagy. Cell Death Dis 2022; 13:1057. [PMID: 36539418 PMCID: PMC9767935 DOI: 10.1038/s41419-022-05454-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/11/2022] [Accepted: 11/18/2022] [Indexed: 12/24/2022]
Abstract
Acute ischemic stroke (AIS) is a global cerebrovascular disease with high disability and mortality, which has no effective therapy. Studies have demonstrated that astrocyte-derived exosomes (ADEXs) provided neuroprotection in experimental stroke models. Nevertheless, the role of exosomes derived from oxygen-glucose-deprivation/reoxygenation-stimulated astrocytes (OGD/R-stimulated astrocytes; OGD/R-ADEXs) in AIS remains largely unknown. Here, we found that OGD/R-ADEXs significantly reduced OGD/R-induced neuronal death and promoted neuronal autophagy. These effects were reversed when astrocytes were pretreated with GW4869, an exosome secretion inhibitor, or when hepatocyte growth factor-regulated tyrosine kinase substrate (Hrs) was knocked down. Neuroprotection was also observed during treatment with OGD/R-ADEXs in vivo. Further studies showed that Nampt, played a vital effect in the regulation of autophagy, was significantly increased in OGD/R-ADEXs. Knockdown of Nampt in astrocytes abolished the above-mentioned effects of OGD/R-ADEXs. Mechanistically, Nampt increased autophagy and decreased cell death by modulating AMPK/mTOR signaling, which recognized as a key signaling pathway of autophagy after AIS. Collectively, these results showed that Nampt released by OGD/R-ADEXs ameliorated acute ischemic stroke during neuronal injury by targeting AMPK/mTOR signaling to induce autophagy. Our study revealed a new key factor in the secretion of exosomes by OGD/R astrocytes, which regulated autophagy and induced neuroprotection in a mouse stroke model.
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Affiliation(s)
- Yang Deng
- grid.89957.3a0000 0000 9255 8984Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China ,grid.254147.10000 0000 9776 7793School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, 211198 Nanjing, China
| | - Rui Duan
- grid.89957.3a0000 0000 9255 8984Department of Neurology, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Wangli Ding
- grid.89957.3a0000 0000 9255 8984Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China ,grid.254147.10000 0000 9776 7793School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, 211198 Nanjing, China
| | - Qiuchen Gu
- grid.89957.3a0000 0000 9255 8984Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China ,grid.254147.10000 0000 9776 7793School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, 211198 Nanjing, China
| | - Manman Liu
- grid.89957.3a0000 0000 9255 8984Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China ,grid.254147.10000 0000 9776 7793School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, 211198 Nanjing, China
| | - Junshan Zhou
- grid.89957.3a0000 0000 9255 8984Department of Neurology, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Jianguo Sun
- grid.254147.10000 0000 9776 7793Key Lab of Drug Metabolism and Pharmacokinetics, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009 Nanjing, China
| | - Junrong Zhu
- grid.89957.3a0000 0000 9255 8984Department of Pharmacy, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China ,grid.254147.10000 0000 9776 7793School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, 211198 Nanjing, China
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13
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Landman TRJ, Uthman L, Hofmans IAH, Schoon Y, de Leeuw FE, Thijssen DHJ. Attenuated inflammatory profile following single and repeated handgrip exercise and remote ischemic preconditioning in patients with cerebral small vessel disease. Front Physiol 2022; 13:1026711. [PMID: 36479354 PMCID: PMC9719941 DOI: 10.3389/fphys.2022.1026711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/10/2022] [Indexed: 01/26/2024] Open
Abstract
Background: Similar to remote ischemic preconditioning bouts of exercise may possess immediate protective effects against ischemia-reperfusion injury. However, underlying mechanisms are largely unknown. This study compared the impact of single and repeated handgrip exercise versus remote ischemic preconditioning on inflammatory biomarkers in patients with cerebral small vessel disease (cSVD). Methods: In this crossover study, 14 patients with cSVD were included. All participants performed 4-day of handgrip exercise (4x5-minutes at 30% of maximal handgrip strength) and remote ischemic preconditioning (rIPC; 4x5-minutes cuff occlusion around the upper arm) twice daily. Patients were randomized to start with either handgrip exercise or rIPC and the two interventions were separated by > 9 days. Venous blood was drawn before and after one intervention, and after 4-day of repeated exposure. We performed a targeted proteomics on inflammation markers in all blood samples. Results: Targeted proteomics revealed significant changes in 9 out of 92 inflammatory proteins, with four proteins demonstrating comparable time-dependent effects between handgrip and rIPC. After adjustment for multiple testing we found significant decreases in FMS-related tyrosine kinase-3 ligand (Flt3L; 16.2% reduction; adjusted p-value: 0.029) and fibroblast growth factor-21 (FGF-21; 32.8% reduction adjusted p-value: 0.029) after single exposure. This effect did not differ between handgrip and rIPC. The decline in Flt3L after repeated handgrip and rIPC remained significant (adjusted p-value = 0.029), with no difference between rIPC and handgrip (adjusted p-value = 0.98). Conclusion: Single handgrip exercise and rIPC immediately attenuated plasma Flt3L and FGF-21, with the reduction of Flt3L remaining present after 4-day of repeated intervention, in people with cSVD. This suggests that single and repeated handgrip exercise and rIPC decrease comparable inflammatory biomarkers, which suggests activation of shared (anti-)inflammatory pathways following both stimuli. Additional studies will be needed to exclude the possibility that this activation is merely a time effect.
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Affiliation(s)
- Thijs R. J. Landman
- Departmenet of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Centre, Gelderland, Netherlands
| | - Laween Uthman
- Departmenet of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Centre, Gelderland, Netherlands
| | - Inge A. H. Hofmans
- Departmenet of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Centre, Gelderland, Netherlands
| | - Yvonne Schoon
- Departmenet of Geriatric Medicine, Radboud Institute for Health Sciences, Radboud University Medical Centre, Gelderland, Netherlands
| | - Frank-Erik de Leeuw
- Center for Cognitive Neuroscience, Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Gelderland, Netherlands
| | - Dick H. J. Thijssen
- Departmenet of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Centre, Gelderland, Netherlands
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Lin H, Zhang Y, Dong S, Cai X, Jiang H, Fan Y, Ying K, Du B, Yu P, Yang W. Targeted Therapy of Ischemic Stroke via Crossing the Blood-Brain Barrier Using Edaravone-Loaded Multiresponsive Microgels. ACS APPLIED BIO MATERIALS 2022; 5:4165-4178. [PMID: 36083038 DOI: 10.1021/acsabm.2c00325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ischemic stroke, as a prevalent neurological disorder, often results in rapid increases in the production of reactive oxygen species (ROS) and inflammatory factors in the focal ischemic area. Though edaravone is an approved treatment, its effect is limited due to its weak ability to cross the blood-brain barrier (BBB) and short half-life. Other effective pharmacological treatment options are clearly lacking. In this study, PNIVDBrF-3-Eda (also named MG-3-Eda) was prepared using a thermo- and pH dual-responsive PNIVDBrF microgel. These were designed with a positively charged network, as synthesized by simultaneous quaternization cross-linking and surfactant-free emulsion copolymerization, to be loaded with the negatively charged edaravone. We then investigated whether such a targeted delivery of edaravone could provide enhanced neuroprotection. Cytotoxicity assays confirmed that the microgel (<1 mg/mL) exhibited promising cytocompatibility with no remarkable effect on cell viability, cell cycle regulation, or apoptosis levels. In vitro and in vivo experiments demonstrated that the microgels could successfully penetrate the blood-brain barrier where efficient BBB crossing was observed after disruption of the BBB due to ischemic injury. This enabled MG-3-Eda to target the cerebral ischemic area and achieve local release of edaravone. Treatment with MG-3-Eda significantly reduced the cerebral infarct area in transient middle cerebral artery occlusion (tMCAO) mice and significantly improved behavioral scores. MG-3-Eda treatment also prevented the reduction in NF200 expression, a neuronal marker protein, and attenuated microglia activation (as detected by Iba1) in the local ischemic area via local antioxidant and anti-inflammatory effects. A superior neuroprotective effect was noted for MG-3-Eda compared to that for free edaravone. Our results indicate that MG-3-Eda administration represents a clear potential treatment for cerebral ischemia via its targeted delivery of edaravone to ischemic areas where it provides significant local antioxidant and anti-inflammatory effects.
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Affiliation(s)
- Hongwei Lin
- Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Yi Zhang
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Shunni Dong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310012, China
| | - Xiaobo Cai
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Hui Jiang
- Department of Toxicology and Department of Medical Oncology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Yang Fan
- Department of Toxicology and Department of Medical Oncology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Kaiyue Ying
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Binyang Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310012, China
| | - Peilin Yu
- Department of Toxicology and Department of Medical Oncology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Wei Yang
- Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
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15
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Xu L, Wang W, Song W. A combination of metformin and insulin improve cardiovascular and cerebrovascular risk factors in individuals with type 1 diabetes mellitus. Diabetes Res Clin Pract 2022; 191:110073. [PMID: 36075464 DOI: 10.1016/j.diabres.2022.110073] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/14/2022] [Accepted: 08/31/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND This study aims to further clarify whether the addition of metformin to insulin treatment improve cardiovascular and cerebrovascular risk factors in individuals with T1DM. METHODS Electronic databases were searched for randomized controlled trials in which the efficacy and safety of metformin were compared with those of a placebo for risk factors of cardiovascular and cerebrovascular disease among individuals with T1DM, and a meta-analysis was conducted. RESULTS Thirteen cardiovascular studies were identified. In the metformin group, mean carotid intimal media thickness was significantly reduced by 0.03 mm, ascending aortic pulse wave velocity by 6.3 m/s, descending aortic wall shear stress by 1.77 dyn/cm2 (P = 0.02), insulin daily dose by 0.05 U/kg/d, body weight by 2.27 kg, fat-free mass by 1.32 kg, body mass index by 0.58 kg/m2, hip circumference by 0.29 m, and low-density lipoprotein by 0.16 mmol/L, all above are P < 0.05. In the metformin group, flow-mediated dilation was increased by 1.29 %, glucose infusion rate/insulin by 18.22 mg/(kg⋅min)/μIU/μL, and waist-to-hip ratio by 0.02, all above are P < 0.00001. The metformin group showed no differences in blood pressure, reactive hyperemia index, waist circumference, triglyceride, total cholesterol, high-density lipoprotein cholesterol, or body mass index Z score. For cerebrovascular studies were identified. But none of them had a risk factor assessment. CONCLUSIONS Metformin can ameliorate cardiovascular and cerebrovascular risk factors through non-hypoglycemic multiple pathways in individuals with T1DM.
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Affiliation(s)
- Linlin Xu
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wei Wang
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wei Song
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.
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16
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The effect of chronic exposure to metformin in a new type-2 diabetic NONcNZO10/LtJ mouse model of stroke. Pharmacol Rep 2022; 74:696-708. [PMID: 35792967 DOI: 10.1007/s43440-022-00382-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/18/2022] [Accepted: 06/10/2022] [Indexed: 10/17/2022]
Abstract
BACKGROUND Diabetes is an independent risk factor of stroke and previous studies have confirmed that diabetic patients and animals experience poorer clinical outcomes following stroke. In this study, we aim to determine the effect of chronic exposure of the first-line antidiabetic agent, metformin, to restore euglycemia and to impact brain cell death following stroke in a new type-2 diabetes, NONcNZO10/LtJ (RCS-10) mouse model of stroke. METHODS Male RCS-10 mice received a moderate (11%) fat diet post-weaning, at 4 weeks of age, and became diabetic by 12-14 weeks, thus resembling human maturity-onset diabetes. The mice received either metformin or vehicle for 4 weeks before undergoing a hypoxic/ischemic (HI) insult. Blood samples were collected pre-, post-treatment, and post HI for glucose and lipid measurements, and brains were analyzed for infarct size, glial activation, neuronal cell death, and metformin-mediated adenosine monophosphate-activated protein kinase (AMPK) signaling at 48 h post HI. RESULTS Pretreatment with metformin maintained euglycemia for 4 weeks but did not change body weight or lipid profile. Metformin treatment significantly enhanced the microglial Bfl-1 mRNA expression and showed a non-significant increase in GFAP mRNA, however, GFAP protein levels were reduced. Metformin treatment slightly increased neuronal NeuN and MAP-2 protein levels and significantly reduced overall mortality post HI but did not elicit any significant change in infarct size. CONCLUSION The study suggests that the prolonged effect of metformin-induced euglycemia promoted the microglial activation, reduced neuronal cell death, and improved the overall survival following stroke, without any change in infarct size.
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17
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Zhu X, Li H, You W, Yu Z, Wang Z, Shen H, Li X, Yu H, Wang Z, Chen G. Role of Rph3A in brain injury induced by experimental cerebral ischemia-reperfusion model in rats. CNS Neurosci Ther 2022; 28:1124-1138. [PMID: 35467084 PMCID: PMC9160444 DOI: 10.1111/cns.13850] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 04/09/2022] [Accepted: 04/13/2022] [Indexed: 01/01/2023] Open
Abstract
Aim The aim was to study the role of Rph3A in neuronal injury induced by cerebral ischemia‐reperfusion. Methods The protein and mRNA levels of Rph3A in penumbra were detected by Western blot. The localization of Rph3A in different cell types in penumbra was detected by immunofluorescence. Apoptosis in the brain was detected by TUNEL staining. We tested neurobehavioral evaluation using rotarod test, adhesive‐removal test, and Morris Water maze test. We examined the expression and localization of Rph3A in cultured neurons and astrocytes in vitro by Western blot and ELISA, respectively. Results The mRNA and protein levels of Rph3A had significantly increased in brain penumbra of the rat MCAO/R model. Rph3A was mainly distributed in neurons and astrocytes and was significantly increased by MCAO/R. We downregulated Rph3A and found that it further worsened the cerebral infarct, neuronal death and behavioral, cognitive, and memory impairments in rats after MCAO/R. We also found that ischemia‐reperfusion upregulated the in vitro protein level and secretion of Rph3A in astrocytes but led to a decrease in the protein level of Rph3A in neurons. Conclusion The increase in Rph3A in the brain penumbra may be an endogenous protective mechanism against ischemia‐reperfusion injury, which is mainly dominated by astrocytes.
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Affiliation(s)
- Xianlong Zhu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China.,Department of Neurosurgery, The Second People's Hospital of Lianyungang City, Lianyungang, Jiangsu, China
| | - Haiying Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Wanchun You
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Zhengquan Yu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Zongqi Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Haitao Shen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Xiang Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Hao Yu
- Department of Neurosurgery, The First People's Hospital of Nantong city, Nantong, Jiangsu, China
| | - Zhong Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
| | - Gang Chen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Institute of Stroke Research, Soochow University, Suzhou, Jiangsu, China
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Zhang G, Chen S, Jia J, Liu C, Wang W, Zhang H, Zhen X. Development and Evaluation of Novel Metformin Derivative Metformin Threonate for Brain Ischemia Treatment. Front Pharmacol 2022; 13:879690. [PMID: 35800435 PMCID: PMC9253272 DOI: 10.3389/fphar.2022.879690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/11/2022] [Indexed: 11/25/2022] Open
Abstract
Epidemiologic data reveal that diabetes patients taking metformin exhibit lower incidence of stroke and better functional outcomes during post-stroke neurologic recovery. We previously demonstrated that chronic post-ischemic administration of metformin improved functional recovery in experimental cerebral ischemia. However, few beneficial effects of metformin on the acute phase of cerebral ischemia were reported either in experimental animals or in stroke patients, which limits the application of metformin in stroke. We hypothesized that slow cellular uptake of metformin hydrochloride may contribute to the lack of efficacy in acute stroke. We recently developed and patented a novel metformin derivative, metformin threonate (SHY-01). Pharmacokinetic profile in vivo and in cultured cells revealed that metformin is more rapidly uptaken and accumulated from SHY-01 than metformin hydrochloride. Accordingly, SHY-01 treatment exhibited more potent and rapid activation of AMP-activated protein kinase (AMPK). Furthermore, SHY-01 elicited a stronger inhibition of microglia activation and more potent neuroprotection when compared to metformin hydrochloride. SHY-01 administration also had superior beneficial effects on neurologic functional recovery in experimental stroke and offered strong protection against acute cerebral ischemia with reduced infarct volume and mortality, as well as the improved sensorimotor and cognitive functions in rats. Collectively, these results indicated that SHY-01 had an improved pharmacokinetic and pharmacological profile and produced more potent protective effects on acute stroke and long-term neurological damage. We propose that SHY-01 is a very promising therapeutic candidate for cerebral ischemic stroke.
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Affiliation(s)
- Gufang Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- *Correspondence: Xuechu Zhen, ; Gufang Zhang,
| | - Shuangshuang Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jia Jia
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Chun Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Weipeng Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- Department of Pharmaceutical Analysis, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Hongjian Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- Department of Pharmaceutical Analysis, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Xuechu Zhen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
- *Correspondence: Xuechu Zhen, ; Gufang Zhang,
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Liu C, Zhang D, Lu Z, Man J, Zhang Z, Fu X, Cui K, Wang J. Metformin protects against pericyte apoptosis and promotes neurogenesis through suppressing JNK p38 MAPK signalling activation in ischemia/reperfusion injury. Neurosci Lett 2022; 783:136708. [PMID: 35660649 DOI: 10.1016/j.neulet.2022.136708] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/12/2022] [Accepted: 05/31/2022] [Indexed: 10/18/2022]
Abstract
Metformin (MET) has been the subject of many classic studies in possessing antiapoptotic, anti-inflammatory, antioxidation activities and antiviral. Recently investigators have examined the anti-apoptosis effects of MET in acute myocardial infarction and Intracerebral hemorrhage, but very little is currently known about how it regulates ischemic stroke-induced pericytes apoptosis and neural stem cells (NSCs) proliferation. The present research explored the potential neuroprotective mechanisms of MET using transient middle cerebral artery occlusion(tMCAO) mice. The experimental work presented that tMCAO mice treated by metformin had better neurologic outcomes on days 1, 3, and 7 after operation, and alleviated blood-brain barrier (BBB) destruction, brain water content and infarct volume on 72 h after surgery. The data showed that MET alleviated BBB disruption by reducing PDGFRβ/ matrix metalloproteinase-9 (MMP9) positive cells, relieving zonula occludens-1 (ZO-1) drop away and increasing pericyte coverage through remarkably reducing the percentage of PDGFRβ/caspase-3 positive cells. In addition, MET induced antiapoptotic activity followed by downregulating cleaved caspase-3 and Bax expression. Moreover, JNK signaling pathway has been proved to be pivotal in mediating apoptosis in cerebral ischemia/reperfusion (I/R) injury. The results of this research illustrated that MET treatment downregulated the levels of phosphorylated JNK and P38 in vivo, however the use of JNK activator anisomycin (ANI) could reverse the neuroprotection effect of MET, demonstrating that the JNK pathway is associated with the anti-apoptosis mechanisms of MET. Finally, metformin remarkably increased the percentage of BrdU/DCX-positive cells in subventricular zone (SVZ) and up-regulated BDNF、VEGF and NGF expression after ischemia/reperfusion(I/R) injury on day 7. Our data illustrated that metformin provides an effective therapy for I/R injury.
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Affiliation(s)
- Chang Liu
- Department of Neurology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Di Zhang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Zhengfang Lu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Jiang Man
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Zhen Zhang
- Department of Neurology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Xiaojuan Fu
- Department of Neurology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Kefei Cui
- Department of Ultrasound, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China
| | - Jianping Wang
- Department of Neurology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052 Henan Province, China.
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Akhtar N, Singh R, Kamran S, Babu B, Sivasankaran S, Joseph S, Morgan D, Shuaib A. Diabetes: Chronic Metformin Treatment and Outcome Following Acute Stroke. Front Neurol 2022; 13:849607. [PMID: 35557626 PMCID: PMC9087832 DOI: 10.3389/fneur.2022.849607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Aim To evaluate if in patients with known diabetes, pretreatment metformin will lead to less severe stroke, better outcome, and lower mortality following acute stroke. Methods The Qatar stroke database was interrogated for stroke severity and outcome in patients with ischemic stroke. Outcome was compared in nondiabetic vs. diabetic patients and in diabetic patients on metformin vs. other hypoglycemic agents. The National Institute of Health Stroke Scale was used to measure stroke severity and 90-day modified Rankin scale (mRS) score to determine outcome following acute stroke. Results In total, 4,897 acute stroke patients [nondiabetic: 2,740 (56%) and diabetic: 2,157 (44%)] were evaluated. There were no significant differences in age, risk factors, stroke severity and type, or thrombolysis between the two groups. At 90 days, mRS (shift analysis) showed significantly poor outcome in diabetic patients (p < 0.001) but no differences in mortality. In the diabetic group, 1,132 patients were on metformin and 1,025 on other hypoglycemic agents. mRS shift analysis showed a significantly better outcome in metformin-treated patients (p < 0.001) and lower mortality (8.1 vs. 4.6% p < 0.001). Multivariate negative binomial analyses showed that the presence of diabetes negatively affected the outcome (90-day mRS) by factor 0.17 (incidence risk ratio, IRR, 1.17; CI [1.08-1.26]; p < 0.001) when all independent variables were held constant. In diabetic patients, pre-stroke treatment with metformin improved the outcome (90-day mRS) by factor 0.14 (IRR 0.86 [CI 0.75-0.97] p = 0.006). Conclusion Similar to previous reports, our study shows that diabetes adversely affects stroke outcome. The use of prior metformin is associated with better outcome in patients with ischemic stroke and results in lower mortality. The positive effects of metformin require further research to better understand its mechanism.
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Affiliation(s)
- Naveed Akhtar
- The Neuroscience Institute, Hamad Medical Corporation, Doha, Qatar
| | - Rajvir Singh
- Cardiology Research Center, Hamad Medical Corporation, Doha, Qatar
| | - Saadat Kamran
- The Neuroscience Institute, Hamad Medical Corporation, Doha, Qatar
| | - Blessy Babu
- The Neuroscience Institute, Hamad Medical Corporation, Doha, Qatar
| | | | - Sujatha Joseph
- The Neuroscience Institute, Hamad Medical Corporation, Doha, Qatar
| | - Deborah Morgan
- The Neuroscience Institute, Hamad Medical Corporation, Doha, Qatar
| | - Ashfaq Shuaib
- Neurology Division, Department of Medicine, University of Alberta, Edmonton, AB, Canada
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21
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Molecular Evidence on the Inhibitory Potential of Metformin against Chlorpyrifos-Induced Neurotoxicity. TOXICS 2022; 10:toxics10040197. [PMID: 35448458 PMCID: PMC9029213 DOI: 10.3390/toxics10040197] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/07/2022] [Accepted: 04/17/2022] [Indexed: 02/06/2023]
Abstract
Chlorpyrifos (CPF) is an organophosphorus (OP) pesticide, resulting in various health complications as the result of ingestion, inhalation, or skin absorption, and leads to DNA damage and increased oxidative stress. Metformin, derived from Galega officinalis, is reported to have anti-inflammatory and anti-apoptotic properties; thus, this study aimed to investigate the beneficial role of metformin in neurotoxicity induced by sub-acute exposure to CPF in Wistar rats. In this study, animals were divided into nine groups and were treated with different combinations of metformin and CPF. Following the 28 days of CPF and metformin administration, brain tissues were separated. The levels of inflammatory biomarkers such as tumor necrosis factor alpha (TNFα) and interleukin 1β (IL-1β), as well as the expression of 5HT1 and 5HT2 genes, were analyzed. Moreover, the levels of malondialdehyde (MDA), reactive oxygen species (ROS), and the ADP/ATP ratio, in addition to the activity of acetylcholinesterase (AChE) and superoxide dismutase (SOD), were tested through in vitro experiments. This study demonstrated the potential role of metformin in alleviating the mentioned biomarkers, which can be altered negatively as a result of CPF toxicity. Moreover, metformin showed protective potential in modulating inflammation, as well as oxidative stress, the expression of genes, and histological analysis, in a concentration-dependent manner.
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22
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Huang Y, Tang J, Li X, Long X, Huang Y, Zhang X. miR-92b-3p Exerts Neuroprotective Effects on Ischemia/Reperfusion-Induced Cerebral Injury via Targeting NOX4 in a Rat Model. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3494262. [PMID: 35401931 PMCID: PMC8986437 DOI: 10.1155/2022/3494262] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 03/09/2022] [Indexed: 12/21/2022]
Abstract
The necessity to increase the efficiency of organ preservation has pushed researchers to consider the mechanisms to minimize cerebral ischemia/reperfusion (I/R) injury. Hence, we evaluated the role of the miR-92b-3p/NOX4 pathway in cerebral I/R injury. A cerebral I/R injury model was established by blocking the left middle cerebral artery for 2 h and reperfusion for 24 h, and a hypoxia/reoxygenation (H/R) model was established. Thereafter, cerebral I/R increased obvious neurobiological function and brain injury (such as cerebral infarction, apoptosis, and cell morphology changes). In addition, we noted a significant decrease in the expression of miR-92b-3p, as well as increases in apoptosis and oxidative stress and an increase in NOX4. Furthermore, overexpression of miR-92b-3p blocked the inhibitory effect of miR-92b-3p on the expression of NOX4 and the accumulation of oxygen-free radicals. Bioinformatics analysis found that NOX4 may be the target gene regulated by miR-92b-3p. In conclusion, the involvement of the miR-92b-3p/NOX4 pathway ameliorated cerebral I/R injury through the prevention of apoptosis and oxidative stress. The miR-92b-3p/NOX4 pathway could be considered a potential therapeutic target to alleviate cerebral I/R injury.
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Affiliation(s)
- Yongpan Huang
- School of Medicine, Changsha Social Work College, Changsha, Hunan, China
| | - Jiayu Tang
- Department of Neurology, Brain Hospital of Hunan Province, Changsha, Hunan, China
| | - Xiaojuan Li
- Department of Neurology, Brain Hospital of Hunan Province, Changsha, Hunan, China
| | - Xian Long
- School of Medicine, Changsha Social Work College, Changsha, Hunan, China
| | - Yansong Huang
- School of Medicine, Changsha Social Work College, Changsha, Hunan, China
| | - Xi Zhang
- Hunan Brain Hospital, Clinical Medical School of Hunan University of Chinese Medicine, Changsha, Hunan, China
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Das J, Mahammad FS, Krishnamurthy RG. An integrated chemo-informatics and in vitro experimental approach repurposes acarbose as a post-ischemic neuro-protectant. 3 Biotech 2022; 12:71. [PMID: 35223357 PMCID: PMC8847516 DOI: 10.1007/s13205-022-03130-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 01/23/2022] [Indexed: 11/26/2022] Open
Abstract
The increasing prevalence of ischemic stroke combined with limited therapeutic options highlights the compelling need for continued research into the development of future neuro-therapeutics. Death-Associated Protein Kinase 1 (DAPK1) and p53 protein-protein interaction serve as a signaling point for the convergence of apoptosis and necrosis in cerebral ischemia. In this study, we used an integrated chemo-informatics and in vitro experimental drug repurposing strategy to screen potential small-molecule inhibitors of DAPK1-p53 interaction from the United States of America Food and Drug Administration (FDA) approved drug database exhibiting post-ischemic neuroprotective and neuro-regenerative efficacy and mechanisms. The computational docking and molecular dynamics simulation of FDA-approved drugs followed by an in vitro experimental validation identified acarbose, an anti-diabetic medication and caloric restriction mimetic as a potential inhibitor of DAPK1-p53 interaction. The evaluation of post-ischemic neuroprotective and regenerative efficacy and mechanisms of action for acarbose was carried out using a set of experimental methods, including cell viability, proliferation and differentiation assays, fluorescence staining, and gene expression analysis. Post-ischemic administration of acarbose conferred significant neuroprotection against ischemia-reperfusion injury in vitro. The reduced fluorescence emission in cells stained with pS20 supported the potential of acarbose in inhibiting the DAPK1-p53 interaction. Acarbose prevented mitochondrial and lysosomal dysfunction, and favorably modulated gene expression related to cell survival, inflammation, and regeneration. BrdU staining and neurite outgrowth assay showed a significant increase in cell proliferation and differentiation in acarbose-treated group. This is the first study known to provide mechanistic insight into the post-ischemic neuroprotective and neuro-regenerative potential of acarbose. Our results provide a strong basis for preclinical studies to evaluate the safety and neuroprotective efficacy of acarbose against ischemic stroke. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-022-03130-5.
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Affiliation(s)
- Jyotirekha Das
- School of Biotechnology, National Institute of Technology Calicut, Calicut, Kerala 673601 India
| | - Fayaz Shaik Mahammad
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
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24
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Yu Q, Jiang X, Liu X, Shen W, Mei X, Tian H, Wu C. Glutathione-modified macrophage-derived cell membranes encapsulated metformin nanogels for the treatment of spinal cord injury. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2022; 133:112668. [DOI: 10.1016/j.msec.2022.112668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/20/2021] [Accepted: 01/14/2022] [Indexed: 12/15/2022]
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Su G, Qu Y, Li G, Deng M. Sevoflurane protects against cerebral ischemia/reperfusion injury via microrna-30c-5p modulating homeodomain-interacting protein kinase 1. Bioengineered 2021; 12:11858-11871. [PMID: 34709114 PMCID: PMC8810137 DOI: 10.1080/21655979.2021.1999551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/22/2021] [Accepted: 10/23/2021] [Indexed: 12/21/2022] Open
Abstract
Sevoflurane (SEV) has been reported to be an effective neuroprotective agent for cerebral ischemia/reperfusion injury (CIRI). However, the precise molecular mechanisms of Sev preconditioning in CIRI remain largely unknown. Therefore, CIRI model was established via middle cerebral artery occlusion method. SEV was applied before modeling. after successful modeling, lentivirus was injected into the lateral ventricle of the brain. Neurological impairment score was performed in each group, and histopathologic condition, infarct volume, apoptosis, inflammation, oxidative stress, microRNA (miR)-30 c-5p and homeodomain-interacting protein kinase 1 (HIPK1) were detected. Mouse hippocampal neuronal cell line HT22 cells were pretreated with SEV, and the in vitro model was stimulated via oxygen-glucose deprivation and reoxygenation. The corresponding plasmids were transfected, and the cell growth was detected, including inflammation and oxidative stress, etc. The targeting of miR-30 c-5p with HIPK1 was examined. The results clarified that reduced miR-30 c-5p and elevated HIPK1 were manifested in CIRI. SEV could improve CIRI and modulate the miR-30 c-5p-HIPK1 axis in vitro and in vivo, and miR-30 c-5p could target HIPK1. Depressed miR-30 c-5p could eliminate the protection of SEV in vitro and in vivo. Repression of HIPK1 reversed the effect of reduced miR-30 c-5p on CIRI. Therefore, it is concluded that SEV is available to depress CIRI via targeting HIPK1 through upregulated miR-30 c-5p.
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Affiliation(s)
- Guoning Su
- Department of Anesthesia, Affiliated Hospital of Yunnan University, KunMing City, China
| | - Yan Qu
- Department of Anesthesia, Affiliated Hospital of Yunnan University, KunMing City, China
| | - Gang Li
- Department of Anesthesia, Affiliated Hospital of Yunnan University, KunMing City, China
| | - Min Deng
- Department of Anesthesia, Affiliated Hospital of Yunnan University, KunMing City, China
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Zhao J, Dong L, Huo T, Cheng J, Li X, Huangfu X, Sun S, Wang H, Li L. O-GlcNAc Transferase (OGT) Protects Cerebral Neurons from Death During Ischemia/Reperfusion (I/R) Injury by Modulating Drp1 in Mice. Neuromolecular Med 2021; 24:299-310. [PMID: 34705256 DOI: 10.1007/s12017-021-08688-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 09/13/2021] [Indexed: 01/01/2023]
Abstract
Previous studies have demonstrated that increased O-linked N-acetylglucosamine (O-GlcNAc) level could promote cell survival following environmental stresses. This study aimed to explore the role of O-GlcNAc transferase (OGT) during cerebral ischemia/reperfusion (I/R) injury. The mouse model with cerebral I/R injury was induced by middle cerebral artery occlusion/reperfusion (MCAO/R). The expression of ogt in brain tissues was detected by qRT-PCR, Western blot, and immunohistochemistry (IHC) staining assay. Neurological deficit was evaluated using a modified scoring system. The infarct volume was assessed by TTC staining assay. Neuronal apoptosis in brain tissues was evaluated by TUNEL staining assay. The level of cleaved caspase-3 in brain tissues was detected by Western blot and IHC staining assay. The expression of critical proteins involved in mitochondrial fission, including OPA1, Mfn1, and Mfn2, as well as Mff and Drp1 was detected by Western blot and IHC, respectively. The expression of ogt during cerebral I/R injury was significantly upregulated. Ogt knockdown significantly increased neurological score and infarct volume in I/R-induced mice. Meanwhile, ogt knockdown significantly enhanced neuronal apoptosis and cleaved caspase-3 level in brain tissues of I/R-induced mice. In addition, ogt knockdown markedly decreased serine 637 phosphorylation level of mitochondrial fission protein dynamin-related protein 1 (Drp1) and promoted Drp1 translocation from the cytosol to the mitochondria. Moreover, the specific Drp1 inhibitor mdivi-1 effectively attenuated ogt knockdown-induced brain injury of I/R-stimulated mice in vivo. Our study revealed that OGT protects against cerebral I/R injury by inhibiting the function of Drp1 in mice, suggesting that ogt may be a potential therapeutic target for cerebral I/R injury.
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Affiliation(s)
- Jingru Zhao
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Lipeng Dong
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Tiantian Huo
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Jinming Cheng
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Xiaojuan Li
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Xiaojuan Huangfu
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Sujuan Sun
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Hebo Wang
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China
| | - Litao Li
- Department of Neurology, Hebei General Hospital, No.348 Heping West Road, Shijiazhuang, 050051, Hebei, P. R. China.
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Prestroke Metformin Use on the 1-Year Prognosis of Intracerebral Hemorrhage Patients with Type 2 Diabetes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:2027359. [PMID: 34567407 PMCID: PMC8457962 DOI: 10.1155/2021/2027359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/29/2021] [Accepted: 08/16/2021] [Indexed: 12/16/2022]
Abstract
Background Although recent studies have focused on the use of metformin in treating ischemic stroke, there is little literature to support whether it can treat intracerebral hemorrhage (ICH). Therefore, this study is aimed at evaluating the possible effects of prestroke metformin (MET) on ICH patients with type 2 diabetes. Methods From January 2010 to December 2019, all first-ever ICH patients with type 2 diabetes from our hospitals were included. All discharged patients would receive a one-time follow-up at 1 year after admission. Death, disability, and recurrence events were recorded. Results We included 730 patients for analysis (the median age: 65 [IQR, 56-72] years and 57.7% was men). Of those patients, 281 (38.5%) had received MET before ICH (MET+), whereas 449 (61.5%) had not (MET−). MET (+) patients had a lower median baseline hematoma volume than did MET (-) patients (9.6 ml [IQR, 5.3-22.4 ml] vs. 14.7 ml [IQR, 7.9-28.6 ml]; P < 0.001). The inhospital mortality events were not significantly reduced in the MET (+) group compared with the MET (-) group (6.4% vs 8.9%, respectively; absolute difference, −2.5% [95% CI, −3.9% to −0.7%]; OR, 0.70 [95% CI, 0.39 to 1.27]; P = 0.22). The 1-year mortality events were not significantly reduced in the MET (+) group compared with the MET (-) group (14.1% vs 17.4%, respectively; absolute difference, −3.3% [95% CI, −5.1% to −1.8%]; OR, 0.73 [95% CI, 0.47 to 1.14]; P = 0.16). The 1-year disability events were not significantly reduced in the MET (+) group compared with the MET (-) group (28.4% vs 34.1%, respectively; absolute difference, −5.7% [95% CI, −8.2% to −3.3%]; OR, 0.77 [95% CI, 0.52 to 1.13]; P = 0.18). Finally, the recurrence rates in those two groups were not significantly different (MET [+] vs. MET [-]: 6.4% vs. 5.9%; absolute difference, 0.5% [95% CI, 0.2% to 1.3%]; OR, 1.08 [95% CI, 0.51 to 2.28]; P = 0.84). Conclusions Pre-ICH metformin use was not associated with inhospital mortality and 1-year prognosis in diabetic ICH patients.
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Effects of Metformin on Spontaneous Ca 2+ Signals in Cultured Microglia Cells under Normoxic and Hypoxic Conditions. Int J Mol Sci 2021; 22:ijms22179493. [PMID: 34502402 PMCID: PMC8430509 DOI: 10.3390/ijms22179493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/20/2021] [Accepted: 08/28/2021] [Indexed: 12/12/2022] Open
Abstract
Microglial functioning depends on Ca2+ signaling. By using Ca2+ sensitive fluorescence dye, we studied how inhibition of mitochondrial respiration changed spontaneous Ca2+ signals in soma of microglial cells from 5-7-day-old rats grown under normoxic and mild-hypoxic conditions. In microglia under normoxic conditions, metformin or rotenone elevated the rate and the amplitude of Ca2+ signals 10-15 min after drug application. Addition of cyclosporin A, a blocker of mitochondrial permeability transition pore (mPTP), antioxidant trolox, or inositol 1,4,5-trisphosphate receptor (IP3R) blocker caffeine in the presence of rotenone reduced the elevated rate and the amplitude of the signals implying sensitivity to reactive oxygen species (ROS), and involvement of mitochondrial mPTP together with IP3R. Microglial cells exposed to mild hypoxic conditions for 24 h showed elevated rate and increased amplitude of Ca2+ signals. Application of metformin or rotenone but not phenformin before mild hypoxia reduced this elevated rate. Thus, metformin and rotenone had the opposing fast action in normoxia after 10-15 min and the slow action during 24 h mild-hypoxia implying activation of different signaling pathways. The slow action of metformin through inhibition of complex I could stabilize Ca2+ homeostasis after mild hypoxia and could be important for reduction of ischemia-induced microglial activation.
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29
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Yang K, Zeng L, Ge A, Chen Y, Wang S, Zhu X, Ge J. Exploring the Regulatory Mechanism of Hedysarum Multijugum Maxim.- Chuanxiong Rhizoma Compound on HIF-VEGF Pathway and Cerebral Ischemia-Reperfusion Injury's Biological Network Based on Systematic Pharmacology. Front Pharmacol 2021; 12:601846. [PMID: 34248611 PMCID: PMC8267578 DOI: 10.3389/fphar.2021.601846] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 05/17/2021] [Indexed: 01/02/2023] Open
Abstract
Background: Clinical research found that Hedysarum Multijugum Maxim.-Chuanxiong Rhizoma Compound (HCC) has definite curative effect on cerebral ischemic diseases, such as ischemic stroke and cerebral ischemia-reperfusion injury (CIR). However, its mechanism for treating cerebral ischemia is still not fully explained. Methods: The traditional Chinese medicine related database were utilized to obtain the components of HCC. The Pharmmapper were used to predict HCC’s potential targets. The CIR genes were obtained from Genecards and OMIM and the protein-protein interaction (PPI) data of HCC’s targets and IS genes were obtained from String database. After that, the DAVID platform was applied for Gene Ontology (GO) enrichment analysis and pathway enrichment analysis. Finally, a series of animal experiments were carried out to further explore the mechanism of HCC intervention in CIR. Results: The prediction results of systematic pharmacology showed that HCC can regulate CIR-related targets (such as AKT1, MAPK1, CASP3, EGFR), biological processes (such as angiogenesis, neuronal axonal injury, blood coagulation, calcium homeostasis) and signaling pathways (such as HIF-1, VEGF, Ras, FoxO signaling). The experiments showed that HCC can improve the neurological deficit score, decrease the volume of cerebral infarction and up-regulate the expression of HIF-1α/VEGF and VEGFR protein and mRNA (p < 0.05). Conclusion: HCC may play a therapeutic role by regulating CIR-related targets, biological processes and signaling pathways found on this study.
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Affiliation(s)
- Kailin Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Liuting Zeng
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Anqi Ge
- Galactophore Department, The First Hospital of Hunan University of Chinese Medicine, Changsha, China
| | - Yi Chen
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Shanshan Wang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Xiaofei Zhu
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China.,School of Graduate, Central South University, Changsha, China
| | - Jinwen Ge
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China.,Shaoyang University, Shaoyang, China
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Cao X, Wang Y, Gao L. CHRFAM7A Overexpression Attenuates Cerebral Ischemia-Reperfusion Injury via Inhibiting Microglia Pyroptosis Mediated by the NLRP3/Caspase-1 pathway. Inflammation 2021; 44:1023-1034. [PMID: 33405023 DOI: 10.1007/s10753-020-01398-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/01/2020] [Accepted: 12/07/2020] [Indexed: 12/11/2022]
Abstract
Cerebral ischemia-reperfusion (I/R) injury is an inflammation-related disease. CHRFAM7A can regulate inflammatory responses. Therefore, the present study investigated the mechanism of CHRFAM7A in cerebral I/R injury. CHRFAM7A expression and inflammatory cytokine levels in patients with cerebral I/R injury and oxygen-glucose deprivation/reperfusion (OGD/R)-treated microglia were detected. The proliferation, inflammatory cytokine expressions, nod-like receptor protein 3 (NLRP3) level, cell pyroptosis, and viability and lactate dehydrogenase (LDH) activity in OGD/R-treated microglia were detected after CHRFAM7A overexpression. The NLRP3/Caspase-1 pathway was activated to assess the effect of CHRFAM7A on microglia. Expressions of microglial M1 phenotype marker iNOS and M2 marker Arg1 were detected. Downregulated CHRFAM7A and elevated inflammatory cytokine levels were observed in patients with cerebral I/R injury and OGD/R-treated microglia. In OGD/R-treated microglia, CHRFAM7A overexpression promoted cell proliferation and viability, reduced inflammation and LDH activity, and inhibited NLRP3 inflammasome activation and cell pyroptosis. Mechanically, CHRFAM7A inhibited microglia pyroptosis via inhibiting the NLRP3/Caspase-1 pathway and reduced cell inflammatory injury via promoting microglia polarization from M1 to M2. Overall, CHRFAM7A overexpression attenuated cerebral I/R injury by inhibiting microglia pyroptosis in a NLRP3/Caspase-1 pathway-dependent manner and promoting microglia polarization to M2 phenotype.
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Affiliation(s)
- Xiangyuan Cao
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Clinical Medical College of Nanjing Medical University, No. 301 Yanchangzhong Road, Shanghai, 200072, China
| | - Yida Wang
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Liang Gao
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Clinical Medical College of Nanjing Medical University, No. 301 Yanchangzhong Road, Shanghai, 200072, China.
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Gu S. Oleanolic Acid Improved Inflammatory Response and Apoptosis of PC12 Cells Induced by OGD/R Through Downregulating miR-142-5P. Nat Prod Commun 2021. [DOI: 10.1177/1934578x211018019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background Oleanolic acid (OA) has notable anti-inflammatory and anti-tumor effects, but the role of OA in cerebral ischemia-reperfusion injury (CIRI) has not been reported so far. Methods Oxygen and glucose deprivation/reoxygenation (OGD/R) model was induced in PC12 cells. MTT assay was used to detect the cell viability of PC12 cells, while ELISA assay detected the expression of TNF-α, IL-1β and IL-6. The expression of superoxide dismutase (SOD), malondialdehyde (MDA) and reactive oxygen species (ROS) was detected by the appropriate kits, and cell apoptosis by Tunel technique. Western blot assay detected the expression of apoptosis-related proteins. The cell transfection technique overexpressed miR-142‐5p. After overexpressing miR-142‐5p by cell transfection technique, the expression of miR-142‐5p was detected by RT-qPCR. Results Besides the ability to promote cell acitivity, OA ameliorated OGD/R-induced inflammatory response and apoptosis in PC12 cells. Moreover, the capability of OA to alleviate OGD/R-induced inflammation and apoptosis in PC12 cells was observed to be related to the down-regulation of miR-142‐5p. Conclusion OA improved inflammatory response and apoptosis of PC12 cells induced by OGD/R through downregulating miR-142‐5P
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Affiliation(s)
- Song Gu
- Department of Rehabilitation Medicine, Nanjing Luhe People’s Hospital, Jiangsu, China
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Diaz A, Muñoz-Arenas G, Venegas B, Vázquez-Roque R, Flores G, Guevara J, Gonzalez-Vergara E, Treviño S. Metforminium Decavanadate (MetfDeca) Treatment Ameliorates Hippocampal Neurodegeneration and Recognition Memory in a Metabolic Syndrome Model. Neurochem Res 2021; 46:1151-1165. [PMID: 33559829 DOI: 10.1007/s11064-021-03250-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 01/02/2021] [Accepted: 01/19/2021] [Indexed: 02/07/2023]
Abstract
The consumption of foods rich in carbohydrates, saturated fat, and sodium, accompanied by a sedentary routine, are factors that contribute to the progress of metabolic syndrome (MS). In this way, they cause the accumulation of body fat, hypertension, dyslipidemia, and hyperglycemia. Additionally, MS has been shown to cause oxidative stress, inflammation, and death of neurons in the hippocampus. Consequently, spatial and recognition memory is affected. It has recently been proposed that metformin decavanadate (MetfDeca) exerts insulin mimetic effects that enhance metabolism in MS animals; however, what effects it can cause on the hippocampal neurons of rats with MS are unknown. The objective of the work was to evaluate the effect of MetfDeca on hippocampal neurodegeneration and recognition memory in rats with MS. Administration of MetfDeca for 60 days in MS rats improved object recognition memory (NORt). In addition, MetfDeca reduced markers of oxidative stress and hippocampal neuroinflammation. Accompanied by an increase in the density and length of the dendritic spines of the hippocampus of rats with MS. We conclude that MetfDeca represents an important therapeutic agent to treat MS and induce neuronal and cognitive restoration mechanisms.
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Affiliation(s)
- Alfonso Diaz
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Guadalupe Muñoz-Arenas
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Berenice Venegas
- Faculty of Biological Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Rubén Vázquez-Roque
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Gonzalo Flores
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Jorge Guevara
- Department of Biochemistry, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
| | | | - Samuel Treviño
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico.
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Yu G, Sun W, Wang W, Le C, Liang D, Shuai L. Overexpression of microRNA-202-3p in bone marrow mesenchymal stem cells improves cerebral ischemia-reperfusion injury by promoting angiogenesis and inhibiting inflammation. Aging (Albany NY) 2021; 13:11877-11888. [PMID: 33893248 PMCID: PMC8109138 DOI: 10.18632/aging.202889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 02/27/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Cerebral ischemia-reperfusion injury (CIRI) can cause brain tissue inflammation, neuronal degeneration, and apoptosis. There is increasing evidence that microRNAs (miRNA) exert neuroprotective effects by regulating the inflammatory process during cerebral ischemia-reperfusion injury. Additionally, it is increasingly acknowledged that neuroinflammation is regulated by Toll-like receptor 4 (TLR4). However, it is unclear whether miRNA can exert its neuroprotective effects by regulating TLR4-mediated inflammation. METHODS The effects of BMSCs over-expressing miR-202-3p on CIRI, angiogenesis in midbrain tissue, and the release of inflammatory factors (IFs) in the serum were measured using in vivo rat models. We also used SH-SY5Y cells to establish an ischemia-reperfusion in vitro cell model. The interaction between miR-202-3p and TLR4 was analyzed by overexpressing miR-202-3p and knocking down TLR4. Knockdown of TLR4 was performed using siRNA. RESULTS Overexpression of miR-202-3p in BMSCs could significantly improve brain function and reduce brain damage. Simultaneously, miR-202-3p could significantly promote angiogenesis, increase the expression of vWF and VEGF, and reduce the expression of IFs. When the expression of TLR4 was significantly reduced in SH-SY5Y cells, the expression of IFs increased. Therefore, miRNA-202-3p may interact with TLR4 to modulate inflammation. CONCLUSION Our data indicated that miR-202-3p potentially exerts its neuroprotective effects and protects against CIRI by regulating TLR4-mediated inflammation.
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Affiliation(s)
- Guohua Yu
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Weiming Sun
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Wansong Wang
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Changhao Le
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Dehuan Liang
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Lang Shuai
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Zemgulyte G, Tanaka S, Hide I, Sakai N, Pampuscenko K, Borutaite V, Rastenyte D. Evaluation of the Effectiveness of Post-Stroke Metformin Treatment Using Permanent Middle Cerebral Artery Occlusion in Rats. Pharmaceuticals (Basel) 2021; 14:ph14040312. [PMID: 33915857 PMCID: PMC8066143 DOI: 10.3390/ph14040312] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
Stroke is the second leading cause of death worldwide. Treatment options for ischemic stroke are limited, and the development of new therapeutic agents or combined therapies is imperative. Growing evidence suggests that metformin treatment, due to its anti-inflammatory action, exerts a neuroprotective effect against ischemia/reperfusion-induced brain damage. Experimental assessment has typically been performed in models of cerebral transient ischemia followed by long-term reperfusion. The aim of this study was to evaluate the neuroprotective effect of metformin treatment after permanent middle cerebral artery occlusion (pMCAO) without reperfusion in rats. Neurological deficits were assessed using the Longa scale, which offers a graded scale on body movement following pMCAO. Both infarct size and brain oedema area were measured by staining with 2,3,5-triphenyltetrazolium chloride. The number of neurons and total and activated microglia, as well as interleukin 10 (IL-10) production, in brain sections were evaluated by immunohistochemical staining. Our results show that metformin treatment improves the neurological state and reduces infarct size after 120 h of pMCAO. Metformin also prevents neuronal loss in the ischemic cortex but not in the striatum after 48 h of pMCAO. Moreover, post-stroke treatment with metformin significantly decreases the number of total and activated microglia at 48 h. The anti-inflammatory effect of metformin is associated with increased IL-10 production at 48 h after pMCAO. The results of the present study suggest that post-stroke treatment with metformin exerts anti-inflammatory and neuroprotective effects in a pMCAO model.
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Affiliation(s)
- Gintare Zemgulyte
- Medical Academy, Department of Neurology, Lithuanian University of Health Sciences, A. Mickeviciaus Str. 9, LT-44307 Kaunas, Lithuania;
- Correspondence:
| | - Shigeru Tanaka
- Department Molecular and Pharmacological Neuroscience, Hiroshima University, 1 Chrome-2-3 Kasumi, Minami Ward, Hiroshima 734-8551, Japan; (S.T.); (I.H.); (N.S.)
| | - Izumi Hide
- Department Molecular and Pharmacological Neuroscience, Hiroshima University, 1 Chrome-2-3 Kasumi, Minami Ward, Hiroshima 734-8551, Japan; (S.T.); (I.H.); (N.S.)
| | - Norio Sakai
- Department Molecular and Pharmacological Neuroscience, Hiroshima University, 1 Chrome-2-3 Kasumi, Minami Ward, Hiroshima 734-8551, Japan; (S.T.); (I.H.); (N.S.)
| | - Katryna Pampuscenko
- Medical Academy, Neuroscience Institute, Lithuanian University of Health Sciences, Sukileliu 13, LT-50162 Kaunas, Lithuania; (K.P.); (V.B.)
| | - Vilmante Borutaite
- Medical Academy, Neuroscience Institute, Lithuanian University of Health Sciences, Sukileliu 13, LT-50162 Kaunas, Lithuania; (K.P.); (V.B.)
| | - Daiva Rastenyte
- Medical Academy, Department of Neurology, Lithuanian University of Health Sciences, A. Mickeviciaus Str. 9, LT-44307 Kaunas, Lithuania;
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Sharma S, Nozohouri S, Vaidya B, Abbruscato T. Repurposing metformin to treat age-related neurodegenerative disorders and ischemic stroke. Life Sci 2021; 274:119343. [PMID: 33716063 DOI: 10.1016/j.lfs.2021.119343] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/22/2021] [Accepted: 03/03/2021] [Indexed: 12/13/2022]
Abstract
Aging is a risk factor for major central nervous system (CNS) disorders. More specifically, aging can be inked to neurodegenerative diseases (NDs) because of its deteriorating impact on neurovascular unit (NVU). Metformin, a first line FDA-approved anti-diabetic drug, has gained increasing interest among researchers for its role in improving aging-related neurodegenerative disorders. Additionally, numerous studies have illustrated metformin's role in ischemic stroke, a cerebrovascular disorder in which the NVU becomes dysfunctional which can lead to permanent life-threatening disabilities. Considering metformin's beneficial preclinical actions on various disorders, and the drug's role in alleviating severity of these conditions through involvement in commonly characterized cellular pathways, we discuss the potential of metformin as a suitable drug candidate for repurposing in CNS disorders.
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Affiliation(s)
- Sejal Sharma
- Department of Pharmaceutical Sciences, Jerry H. Hodge School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), Amarillo, TX, USA
| | - Saeideh Nozohouri
- Department of Pharmaceutical Sciences, Jerry H. Hodge School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), Amarillo, TX, USA
| | - Bhuvaneshwar Vaidya
- Department of Pharmaceutical Sciences, Jerry H. Hodge School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), Amarillo, TX, USA
| | - Thomas Abbruscato
- Department of Pharmaceutical Sciences, Jerry H. Hodge School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), Amarillo, TX, USA.
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Khan H, Singh A, Thapa K, Garg N, Grewal AK, Singh TG. Therapeutic modulation of the phosphatidylinositol 3-kinases (PI3K) pathway in cerebral ischemic injury. Brain Res 2021; 1761:147399. [PMID: 33662337 DOI: 10.1016/j.brainres.2021.147399] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 02/09/2021] [Accepted: 02/23/2021] [Indexed: 12/16/2022]
Abstract
The cerebral ischemic reperfusion injury may leads to morbidity and mortality in patients. phosphatidylinositol 3-kinase (PI3K) signaling pathway has been believed to work in association with its downstream targets, other receptors, and pathways that may offer antioxidant, anti-inflammatory, anti-apoptotic effects, neuroprotective role in neuronal excitotoxicity. This review elaborates the mechanistic interventions of the PI3K pathway in cerebral ischemic injury in context to nuclear factor erythroid 2-related factor 2 (Nrf2) regulation, Hypoxia-inducible factor 1 signaling (HIF-1), growth factors, Endothelial NOS (eNOS) proinflammatory cytokines, Erythropoietin (EPO), Phosphatase and tensin homologous protein of chromosome 10 gene (PTEN) signaling, NF-κB/Notch signaling, c-Jun N-terminal kinase (JNK) and Glycogen synthase kinase-3β (GSK-3β) signaling pathway. Evidences showing the activation of PI3K inhibits apoptotic pathway, which results in its neuroprotective effect in ischemic injury. Despite discussing the therapeutic role of the PI3K pathway in treating cerebral ischemic injury, the review also enlighten the selective modulation of PI3K pathway with activators and inhibitors which may provide promising results in clinical and preclinical settings.
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Affiliation(s)
- Heena Khan
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Anjali Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Komal Thapa
- Chitkara College of Pharmacy, Chitkara University, Punjab, India; School of Pharmacy, Chitkara University, Himachal Pradesh, India
| | - Nikhil Garg
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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Thinnes A, Westenberger M, Piechotta C, Lehto A, Wirth F, Lau H, Klein J. Cholinergic and metabolic effects of metformin in mouse brain. Brain Res Bull 2021; 170:211-217. [PMID: 33617923 DOI: 10.1016/j.brainresbull.2021.02.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/05/2021] [Accepted: 02/16/2021] [Indexed: 01/11/2023]
Abstract
Metformin is widely used as a first-line treatment for type 2 diabetes, but central effects of metformin have received little attention. When metformin (200 mg/kg i.p.) was administered to C57Bl6 mice, metformin concentration in cerebrospinal fluid peaked at 29 μM after 30 min but dropped quickly and was low at 90 min. In mouse hypothalamus sampled by microdialysis, systemically administered metformin caused minor and transient increases of acetylcholine, glucose and lactate while choline levels decreased. When metformin (0.2-10 mM) was locally infused via retrodialysis, there was a short-lasting increase of acetylcholine in the hypothalamus. Extracellular lactate levels in hypothalamus showed a massive increase upon metformin infusion while glucose levels decreased. In isolated mitochondria of mouse brain, metformin inhibited oxygen consumption and the activity of complex I. Inhibition of mitochondrial respiration likely explains lactate formation in the brain during metformin infusion which may cause lactic acidosis during metformin intoxication. The changes of cholinergic activity in the hypothalamus may be associated with appetite suppression observed during metformin treatment.
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Affiliation(s)
- Anna Thinnes
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany
| | - Mara Westenberger
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany
| | - Christian Piechotta
- Bundesanstalt für Materialforschung und -prüfung (BAM), 12200, Berlin, Germany
| | - Alina Lehto
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany
| | - Franziska Wirth
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany
| | - Helene Lau
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany
| | - Jochen Klein
- Department of Pharmacology and Clinical Pharmacy, College of Pharmacy, Goethe University of Frankfurt, 60438, Frankfurt, Germany.
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38
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Sun G, Qin W, Wang Q, Sun X, Chen H, Li J, Sun L, Shi F, Zhang G, Wang M. Selective-cerebral-hypothermia-induced neuroprotection against-focal cerebral ischemia/reperfusion injury is associated with an increase in SUMO2/3 conjugation. Brain Res 2021; 1756:147311. [PMID: 33539797 DOI: 10.1016/j.brainres.2021.147311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 10/22/2022]
Abstract
Selective cerebral hypothermia is considered an effective treatment for neuronal injury after stroke and avoids the complications of general hypothermia. Several recent studies hanve suggested that SUMO2/3 conjugation occurs following cerebral ischemia/reperfusion (I/R) injury. However, the relationship between the cerebral protective effect of selective cerebral hypothermia and SUMO2/3 conjugation remains unclear. In this study, we investigated the effect of selective cerebral hypothermia on SUMO2/3 conjugation during focal cerebral I/R injury. A total of 140 Sprague-Dawley rats were divided into four groups. In the sham group, only the carotid artery was exposed. The endoluminal filament technique was used to induce middle cerebral artery occlusion in the other three groups. After 2 h of occlusion, the filaments were slowly removed to allow blood reperfusion in the I/R group. In the hypothermia (HT) group and normothermia (NT) group, normal saline at 4 °C and 37 °C, respectively , was perfused through the carotid artery, followed by the restoration of blood flow. The results of the modified neurological severity score (mNSS), 2,3,5-triphenyltetrazolium chloride (TTC) staining, hematoxylin-eosin (HE) staining, and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining demonstrated that selective cerebral hypothermia significantly decreased I/R-induced neuronal injury (mNSS, n = 8, 24 h, HT (5.88 ± 2.36) vs. I/R (8.63 ± 3.38), P < 0.05. 48 h, HT (5.75 ± 2.25) vs. I/R (8.5 ± 2.88), P < 0.05. Cerebral infarct volume percentages, n = 5, HT (18.71 ± 2.13) vs. I/R (41.52 ± 2.90), P < 0.01. Cell apoptosis rate, n = 5, 24 h, HT (21.28 ± 2.61) vs. I/R (43.72 ± 4.30), P < 0.05. 48 h, HT (20.50 ± 2.53) vs. I/R (38.94 ± 2.93), P < 0.05). The expression of Ubc9 and conjugated SUMO2/3 proteins was increased at 24 and 48 h after reperfusion in the 3 non-sham groups, and hypothermia further upregulated the expression of Ubc9 and conjugated SUMO2/3 proteins in the HT group. The expression of SENP3 was increased in the NT group and I/R group, while it was decreased in the HT group at 24 and 48 h after reperfusion (Relative quantities, n = 5, Ubc9, 24 h, HT (2.44 ± 0.22) vs. I/R (1.55 ± 0.39), P < 0.05. 48 h, HT (2.69 ± 0.16) vs. I/R (2.25 ± 0.33), P < 0.05. SENP3, 24 h, HT (0.47 ± 0.15) vs. I/R (2.18 ± 0.43), P < 0.05. 48 h, HT (0.72 ± 0.06) vs. I/R (1.51 ± 0.19), P < 0.05. conjugated SUMO2/3 proteins, 24 h, HT (2.84 ± 0.24) vs. I/R (2.51 ± 0.20), P < 0.05. 48 h, HT (2.73 ± 0.13) vs. I/R (2.44 ± 0.13), P < 0.05). Further analysis showed that the variation in SENP3 expression was more obvious than that in Ubc9 under hypothermia intervention in the HT group. These findings suggest that selective cerebral hypothermia could increase SUMO2/3 modification mainly via down-regulating the expression of SENP3, and then exert neuroprotective effects in rats with cerebral I/R injury.
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Affiliation(s)
- Guiliang Sun
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Weiwei Qin
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Qiang Wang
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Xiaopeng Sun
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Huailong Chen
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Jingzhu Li
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Lixin Sun
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Fei Shi
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China
| | - Gaofeng Zhang
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China.
| | - Mingshan Wang
- Department of Anesthesiology, Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao 266071, China.
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MicroRNA-338-5p alleviates cerebral ischemia/reperfusion injury by targeting connective tissue growth factor through the adenosine 5'-monophosphate-activated protein kinase/mammalian target of rapamycin signaling pathway. Neuroreport 2021; 31:256-264. [PMID: 32032283 DOI: 10.1097/wnr.0000000000001404] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cerebral ischemia/reperfusion (CIR) injury could lead to the function of brain cell disorder and cerebral infarction. MicroRNAs (miRNAs) have been reported to participate in the progression and protection of CIR injury. Thus, our study aimed to investigate the functional effects of microRNA-338-5p (miR-338-5p) on proliferation, apoptosis, and inflammatory response of CIR injury. According to the results, miR-338-5p was downregulated in the brain of the mice caused by CIR injury, and overexpression of miR-338-5p reduced the neurological deficit and infarct volume of the brain in the mice caused by CIR injury. Meanwhile, miR-338-5p overexpression promoted the proliferation, while suppressed the apoptosis and the inflammatory response of Neuro-2a cells exposed to hypoxia/reoxygenation (H/R). Interestingly, miR-338-5p directly targeted connective tissue growth factor (CTGF) and overexpression of CTGF reversed the functional effects of miR-338-5p on proliferation, apoptosis, and inflammatory response in Neuro-2a cells caused by H/R. More importantly, miR-338-5p affected the adenosine 5¢-monophosphate (AMP)-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) signaling pathway by regulating CTGF expression in Neuro-2a cells exposed to H/R. Taken together, we concluded that MiR-338-5p promoted the proliferation, while suppressed the apoptosis and the inflammatory response of cells exposed to H/R by targeting CTGF through the AMPK/mTOR signaling pathway.
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Chuan L, Huang X, Fan C, Wen S, Yang X, Wang J, Ren J, Ru J, Ding L. Metformin ameliorates brain damage caused by cardiopulmonary resuscitation via targeting endoplasmic reticulum stress-related proteins GRP78 and XBP1. Eur J Pharmacol 2021; 891:173716. [PMID: 33197442 DOI: 10.1016/j.ejphar.2020.173716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 12/13/2022]
Abstract
Cerebral damage after cardiac arrest (CA) and cardiopulmonary resuscitation (CPR) is a primary cause of death. Endoplasmic reticulum stress (ERS) is very important during these situations. This study aimed to explore the role of metformin in protecting brain endoplasmic reticulum post CA/CPR. Male SD rats (n = 132) were treated with 6-min CA-posted asphyxia and sham surgery. Before CA/CPR, metformin (200 mg/kg/day) or a vehicle (0.9% saline) were administered randomly for two weeks. The neurological deficit scores were assessed 24 h, 48 h, 72 h, and 7 days after CA/CPR, and the rat brains were analyzed by Western blotting and qRT-PCR. Apoptosis was detected by the TUNEL assay according to the mitochondrial membrane potential (MMP). Oxidative stress and ERS-related protein expression were also investigated. The Western blotting and qRT-PCR results revealed that the resuscitated animals had time-dependent elevated GRP78 and XBP1 levels compared with the sham operative rats. Moreover, our results showed that the rats treated with metformin had increased neurological deficit scores (NDS), an improved seven-day survival rate, decreased cell apoptosis within the hippocampus CA1 area, and less oxidative stress compared with the CA/CPR group. Furthermore, metformin inhibited the mRNA and protein expressions of glucose-regulated protein 78 (GRP78) and X-box binding protein 1 (XBP1) in the CA/CPR rat model. We confirmed that CA/CPR can induce ERS-related apoptosis and oxidative stress in the brain; moreover, inhibiting ERS-related proteins GRP78 and XBP1 with metformin might attenuate cerebral injury post CA/CPR.
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Affiliation(s)
- Libo Chuan
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Kunming, 650500, China; ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Xin Huang
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Chuming Fan
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Shiyuan Wen
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Xiaohua Yang
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Jingrong Wang
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Jingyu Ren
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Jin Ru
- ICU, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
| | - Li Ding
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Kunming, 650500, China; Department of Neurology, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650500, China.
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Demaré S, Kothari A, Calcutt NA, Fernyhough P. Metformin as a potential therapeutic for neurological disease: mobilizing AMPK to repair the nervous system. Expert Rev Neurother 2020; 21:45-63. [PMID: 33161784 PMCID: PMC9482886 DOI: 10.1080/14737175.2021.1847645] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Introduction: Metformin is currently first line therapy for type 2 diabetes (T2D). The mechanism of action of metformin involves activation of AMP-activated protein kinase (AMPK) to enhance mitochondrial function (for example, biogenesis, refurbishment and dynamics) and autophagy. Many neurodegenerative diseases of the central and peripheral nervous systems arise from metabolic failure and toxic protein aggregation where activated AMPK could prove protective. Areas covered: The authors review literature on metformin treatment in Parkinson’s disease, Huntington’s disease and other neurological diseases of the CNS along with neuroprotective effects of AMPK activation and suppression of the mammalian target of rapamycin (mTOR) pathway on peripheral neuropathy and neuropathic pain. The authors compare the efficacy of metformin with the actions of resveratrol. Expert opinion: Metformin, through activation of AMPK and autophagy, can enhance neuronal bioenergetics, promote nerve repair and reduce toxic protein aggregates in neurological diseases. A long history of safe use in humans should encourage development of metformin and other AMPK activators in preclinical and clinical research. Future studies in animal models of neurological disease should strive to further dissect in a mechanistic manner the pathways downstream from metformin-dependent AMPK activation, and to further investigate mTOR dependent and independent signaling pathways driving neuroprotection.
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Affiliation(s)
- Sarah Demaré
- Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada.,Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada
| | - Asha Kothari
- Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada.,Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada
| | - Nigel A Calcutt
- Department of Pathology, University of California San Diego , La Jolla, CA, USA
| | - Paul Fernyhough
- Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada.,Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada
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Metformin protects against myocardial ischemia-reperfusion injury and cell pyroptosis via AMPK/NLRP3 inflammasome pathway. Aging (Albany NY) 2020; 12:24270-24287. [PMID: 33232283 PMCID: PMC7762510 DOI: 10.18632/aging.202143] [Citation(s) in RCA: 147] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 09/29/2020] [Indexed: 01/15/2023]
Abstract
Ischemia/reperfusion (I/R) injury is a life-threatening vascular emergency following myocardial infarction. Our previous study showed cardioprotective effects of metformin against myocardial I/R injury. In this study, we further examined the involvement of AMPK mediated activation of NLRP3 inflammasome in this cardioprotective effect of metformin. Myocardial I/R injury was simulated in a rat heart Langendorff model and neonatal rat ventricle myocytes (NRVMs) were subjected to hypoxi/reoxygenation (H/R) to establish an in vitro model. Outcome measures included myocardial infarct size, hemodynamic monitoring, myocardial tissue injury, myocardial apoptotic index and the inflammatory response. myocardial infarct size and cardiac enzyme activities. First, we found that metformin postconditioning can not only significantly alleviated myocardial infarct size, attenuated cell apoptosis, and inhibited myocardial fibrosis. Furthermore, metformin activated phosphorylated AMPK, decreased pro-inflammatory cytokines, TNF-α, IL-6 and IL-1β, and decreased NLRP3 inflammasome activation. In isolated NRVMs metformin increased cellular viability, decreased LDH activity and inhibited cellular apoptosis and inflammation. Importantly, inhibition of AMPK phosphorylation by Compound C (CC) resulted in decreased survival of cardiomyocytes mainly by inducing the release of inflammatory cytokines and increasing NLRP3 inflammasome activation. Finally, in vitro studies revealed that the NLRP3 activator nigericin abolished the anti-inflammatory effects of metformin in NRVMs, but it had little effect on AMPK phosphorylation. Collectively, our study confirmed that metformin exerts cardioprotective effects by regulating myocardial I/R injury-induced inflammatory response, which was largely dependent on the enhancement of the AMPK pathway, thereby suppressing NLRP3 inflammasome activation.
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Liu J, Sun X, Jin H, Yan XL, Huang S, Guo ZN, Yang Y. Remote ischemic conditioning: A potential therapeutic strategy of type 2 diabetes. Med Hypotheses 2020; 146:110409. [PMID: 33277103 DOI: 10.1016/j.mehy.2020.110409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/12/2020] [Accepted: 11/17/2020] [Indexed: 02/06/2023]
Abstract
Type 2 diabetes (T2D) is one of the major public diseases which is characterized by peripheral insulin resistance (IR) and progressive pancreatic β-cell failure. While in the past few years, some new factors, such as inflammation, oxidative stress, immune responses and other potential pathways, have been identified to play critical roles in T2D, and thereby provide novel promising targets for the treatment of T2D. Remote ischemic conditioning (RIC) is a non-invasive and convenient operation performed by transient, repeated ischemia in distant place. Nowadays, RIC has been established as a potentially powerful therapeutic tool for many diseases, especially in I/R injuries. Through activating a series of neural, humoral and immune pathways, it can release multiple protective signals, which then regulating inflammation, oxidative stress, immune response and so on. Interestingly, several recent studies have discovered that the beneficial effects of RIC on I/R injuries might be abolished by T2D, wherein the higher basal levels of inflammation and oxidative stress, dysregulation of immune system and some potential pathways secondary to hyperglycemia may play critical roles. In contrast, a higher intensity of conditioning could restore the protective effects. Based on the overlapped mechanisms RIC and T2D performs, we provide a hypothesis that RIC may also play a protective role in T2D via targeting these signaling pathways.
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Affiliation(s)
- Jie Liu
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, No. 1 Xinmin Street, Changchun 130021, China
| | - Xin Sun
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China
| | - Hang Jin
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China
| | - Xiu-Li Yan
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China
| | - Shuo Huang
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, No. 1 Xinmin Street, Changchun 130021, China
| | - Zhen-Ni Guo
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, No. 1 Xinmin Street, Changchun 130021, China.
| | - Yi Yang
- Stroke Center & Clinical Trial and Research Center for Stroke, Department of Neurology, the First Hospital of Jilin University, No. 1 Xinmin Street, Changchun 130021, China; China National Comprehensive Stroke Center, No. 1 Xinmin Street, Changchun 130021, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, No. 1 Xinmin Street, Changchun 130021, China.
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Huang Y, Pan L, Wu T. Improvement of cerebral ischemia-reperfusion injury by L-3-n-butylphthalide through promoting angiogenesis. Exp Brain Res 2020; 239:341-350. [PMID: 33180154 DOI: 10.1007/s00221-020-05978-6] [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: 07/13/2020] [Accepted: 11/02/2020] [Indexed: 12/11/2022]
Abstract
Cerebral ischemia/reperfusion (I/R) injury may lead to a poor prognosis for ischemic stroke patients after reperfusion therapy, and currently, lacks effective therapeutic intervention. This study aimed to investigate the effects of L-3-n-butylphthalide (L-NBP) on cerebral I/R injury in rats. Rat models of cerebral I/R injury were established using the middle cerebral artery occlusion/refusion (MACO/R) surgery and were administrated intragastrically with L-NBP or vehicle. We found that L-NBP attenuated the histological damages and reduced the brain hematoma in MACO/R rats. L-NBP also significantly improved the neurological function, alleviated the brain edema, and reduced the permeability of blood-brain barrier of MACO/R rats. Moreover, we detected that L-NBP considerably facilitated microvessel formation in the lesion area of brain in MACO/R rats. Finally, we found that L-NBP significantly increased the protein and mRNA expression levels of Nrf2, HIF-1α, and VEGF in the brain of MACO/R rats. In conclusion, our results demonstrated that L-NBP exerted significant beneficial effects on cerebral I/R injury in rats through promoting angiogenesis, which may be associated with the activation of Nrf2/HIF-1α/VEGF signaling pathway. Our results suggested that L-NBP could be a potential therapeutic drug for cerebral I/R injury.
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Affiliation(s)
- Ying Huang
- Department of Pharmacy, The People's Hospital of Yichun City, Yichun, 336000, People's Republic of China
| | - Lishou Pan
- Department of Neurology, The People's Hospital of Yichun City, Yichun, 336000, People's Republic of China
| | - Ting Wu
- Department of Pharmacy, The People's Hospital of Yichun City, Yichun, 336000, People's Republic of China.
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Pratchayasakul W, Jinawong K, Pongkan W, Jaiwongkam T, Arunsak B, Chunchai T, Tokuda M, Chattipakorn N, Chattipakorn SC. Not only metformin, but also D-allulose, alleviates metabolic disturbance and cognitive decline in prediabetic rats. Nutr Neurosci 2020; 25:1115-1127. [PMID: 33151133 DOI: 10.1080/1028415x.2020.1840050] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Prediabetes can be characterized as obesity with metabolic disturbance, leading to cognitive decline and brain pathologies. D-allulose administration in obese animals decreased metabolic disturbance. However, the comparative effects of D-allulose and metformin on cognition and brain functions in the diet-induced prediabetic condition are unclear. We assume that both D-allulose and metformin equally restore cognition and brain functions in prediabetic rats to an equal extent. MATERIALS AND METHODS Fifty-six rats were randomly divided into two groups: a control and diet-induced prediabetic group which had received a normal diet (ND) and a high-fat diet (HFD) for 24 weeks, respectively. After dietary protocol had been followed for 12 weeks, ND rats were given solely drinking water daily for 12 weeks. HFD-prediabetic rats randomly received drinking water with either D-allulose (1.9 g/kg/day of D-allulose) or metformin (300 mg/kg/day of metformin) for 12 weeks. Following this, cognition and brain parameters were determined. RESULTS Brain oxidative stress, mitochondrial dysfunction, microglial hyper-activation, apoptosis, brain insulin insensitivity, hippocampal synaptic dysfunction, and cognitive decline were observed in prediabetic rats. D-allulose and metformin equally attenuated brain oxidative stress, brain mitochondrial ROS production, hippocampal apoptosis, brain insulin insensitivity, hippocampal synaptic dysfunction, resulting in improved learning process in prediabetic rats. Metformin conferred greater advantage on the amelioration of brain mitochondrial dysfunction and brain microglial hyper-activation than D-allulose, resulting in improvement in both learning and memory processes in prediabetic rats. CONCLUSIONS Not only metformin, but also D-allulose, has beneficial effects on the enhancement of brain function and cognition in prediabetic condition.
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Affiliation(s)
- Wasana Pratchayasakul
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.,Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Kewarin Jinawong
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.,Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Wanpitak Pongkan
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.,Department of Veterinary Biosciences and Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Thidarat Jaiwongkam
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Busarin Arunsak
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Titikorn Chunchai
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Masaaki Tokuda
- International Institute of Rare Sugar Research and Education, Kagawa University, Takamatsu, Japan
| | - Nipon Chattipakorn
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.,Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Siriporn C Chattipakorn
- Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
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Seizure-Induced Oxidative Stress in Status Epilepticus: Is Antioxidant Beneficial? Antioxidants (Basel) 2020; 9:antiox9111029. [PMID: 33105652 PMCID: PMC7690410 DOI: 10.3390/antiox9111029] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/14/2020] [Accepted: 10/19/2020] [Indexed: 02/06/2023] Open
Abstract
Epilepsy is a common neurological disorder which affects patients physically and mentally and causes a real burden for the patient, family and society both medically and economically. Currently, more than one-third of epilepsy patients are still under unsatisfied control, even with new anticonvulsants. Other measures may be added to those with drug-resistant epilepsy. Excessive neuronal synchronization is the hallmark of epileptic activity and prolonged epileptic discharges such as in status epilepticus can lead to various cellular events and result in neuronal damage or death. Unbalanced oxidative status is one of the early cellular events and a critical factor to determine the fate of neurons in epilepsy. To counteract excessive oxidative damage through exogenous antioxidant supplements or induction of endogenous antioxidative capability may be a reasonable approach for current anticonvulsant therapy. In this article, we will introduce the critical roles of oxidative stress and further discuss the potential use of antioxidants in this devastating disease.
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47
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Zhang T, Wang F, Li K, Lv C, Gao K, Lv C. Therapeutic effect of metformin on inflammation and apoptosis after spinal cord injury in rats through the Wnt/β-catenin signaling pathway. Neurosci Lett 2020; 739:135440. [PMID: 33132177 DOI: 10.1016/j.neulet.2020.135440] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 08/25/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To verify the effect of metformin on spinal cord injury (SCI) through Wnt/β-catenin signaling pathway. BACKGROUND SCI is a serious traumatic disease of the central nervous system. Wnt/β-catenin signaling pathway plays important roles in SCI. Metformin has been reported to exert neuroprotective effects in the central nervous system. Whether metformin could improve SCI through Wnt/β-catenin signaling pathway remains unclear. METHODS Rats were divided into sham group, SCI group, SCI + metformin group, metformin + XAV939 group (XAV939 is an effective inhibitor of the Wnt/β-catenin signaling pathway), and methylprednisolone group. BBB scores were used to detect motor function recovery at different time points (0, 1, 3, 7, 14, 21, and 28 days) in SCI rats. Western blot analysis, immunofluorescence, TUNEL, HE and Nissl staining were used to observe the morphological characteristics of spinal cord tissue and the expression of inflammation and apoptosis in spinal cord neurons. RESULTS Metformin(50 mg/kg) promoted motor functional recovery in rats after SCI, increased the expressions of β-catenin and brain derived neurotrophic factor (BDNF), inhibited neuron apoptosis and inflammatory response, and improved the recovery of pathological morphology at the injury site by activating the Wnt/β-catenin signaling pathway. CONCLUSION We found a possible mechanism that metformin could reduce inflammation and apoptosis, and promote functional recovery of SCI rats through activating Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Tao Zhang
- School of Clinical Medicine, Jining Medical University, Jining, China; Department of Orthopedics, Jining No. 1 People's Hospital, Jining, China
| | - Fang Wang
- Department of Science and Education, Jining No. 1 People's Hospital, Jining, China
| | - Kang Li
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, China
| | - Chengwei Lv
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, China
| | - Kai Gao
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, China.
| | - Chaoliang Lv
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, China.
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A Study of Associations Between Plasma Metformin Concentration, Lactic Acidosis, and Mortality in an Emergency Hospitalization Context. Crit Care Med 2020; 48:e1194-e1202. [DOI: 10.1097/ccm.0000000000004589] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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49
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Compound K inhibits autophagy-mediated apoptosis induced by oxygen and glucose deprivation/reperfusion via regulating AMPK-mTOR pathway in neurons. Life Sci 2020; 254:117793. [DOI: 10.1016/j.lfs.2020.117793] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/26/2020] [Accepted: 05/12/2020] [Indexed: 12/27/2022]
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50
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Fatemi I, Saeed-Askari P, Hakimizadeh E, Kaeidi A, Esmaeil-Moghaddam S, Pak-Hashemi M, Allahtavakoli M. Long-term metformin therapy improves neurobehavioral functions and antioxidative activity after cerebral ischemia/reperfusion injury in rats. Brain Res Bull 2020; 163:65-71. [PMID: 32693150 DOI: 10.1016/j.brainresbull.2020.07.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 06/09/2020] [Accepted: 07/15/2020] [Indexed: 12/19/2022]
Abstract
Metformin (MET),an antidiabetic drug, has shown antioxidative and neuroprotective effects. In the present investigation, we aimed to study the probable effects of MET on cerebral ischemia/reperfusion in rats. Rats underwent cerebral ischemia/reperfusion and MET was administered orally at doses of 100 and 200 mg/kg for 56 days. Anxiety- and depressive-like behaviors were evaluated by elevated plus-maze or forced swimming tests, respectively. was assessed by. Cognitive functions were assessed by Y-maze continuous alternation task and morris water maze. The activity of SOD and the level of BDNF were measured in brains samples. Our results showed that administration of 200 mg/kg MET reduced the percent of brain edema (84.00 ± 2.13) in comparison with the ischemic animals (91.25 ± 2.25) (p < 0.05). Administration of 200 mg/kg MET in ischemic animals improved anxiety-like behavior by increasing the percentage of the open arms entries (46.51 ± 3.13) and the percentage of the open arms time (32.70 ± 2.49) in comparison with the cerebral ischemia group (26.35 ± 7.02 and 15.32 ± 5.78, respectively) (all p < 0.001). MET treatment (200 mg/kg) increased the cognition index of correct alternations (90.20 ± 4.95) in comparison with the cerebral ischemia group (59.50 ± 8.01) (p < 0.05). MET at the both doses reduced escape latency compared to the cerebral ischemia animals (all p < 0.05). In addition, 200 mg/kg MET increased the time spent in the target quadrant (16.06 ± 0.58) in comparison with the ischemic animals (9.84 ± 0.92) (p < 0.001) and the both doses of the drug increased the number of crossing (5.42 ± 0.36 and 6.5 ± 0.42, respectively) compared to the cerebral ischemia group (3.75 ± 0.31) (p < 0.05 and p < 0.001, respectively). Moreover, 200 mg/kg MET reduced the immobility time (47.50 ± 9.00) in comparison with the cerebral ischemia group (93.43 ± 8.28) (p < 0.001). Furthermore, the both doses of MET increased the BDNF levels (4590 ± 197.6 and 4767 ± 44.10, respectively) in comparison with the ischemic animals (3807 ± 42.56) (p < 0.01 and p < 0.001, respectively). Also, the both doses of the drug increased the SOD activity of brain (52.67 ± 0.33 and 55.00 ± 0.57, respectively) compared to the ischemic animals (49.33 ± 0.33) (p < 0.01 and p < 0.001, respectively). Based on our data, long-term MET therapy may improve behavioral disorders following cerebral ischemia/reperfusion and can be considered as a novel therapeutic approach for the treatment of brain ischemic conditions.
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Affiliation(s)
- Iman Fatemi
- Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | - Pooya Saeed-Askari
- Student Research Committee, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Elham Hakimizadeh
- Physiology-Pharmacology Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Ayat Kaeidi
- Physiology-Pharmacology Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran; Department of Physiology and Pharmacology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | | | - Mohammad Pak-Hashemi
- Student Research Committee, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Mohammad Allahtavakoli
- Physiology-Pharmacology Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran; Department of Physiology and Pharmacology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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