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Arya S, Bahuguna D, Bajad G, Loharkar S, Devangan P, Khatri DK, Singh SB, Madan J. Colloidal therapeutics in the management of traumatic brain injury: Portray of biomarkers and drug-targets, preclinical and clinical pieces of evidence and future prospects. Colloids Surf B Biointerfaces 2023; 230:113509. [PMID: 37595379 DOI: 10.1016/j.colsurfb.2023.113509] [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: 05/22/2023] [Revised: 07/28/2023] [Accepted: 08/05/2023] [Indexed: 08/20/2023]
Abstract
Complexity associated with the aberrant physiology of traumatic brain injury (TBI) makes its therapeutic targeting vulnerable. The underlying mechanisms of pathophysiology of TBI are yet to be completely illustrated. Primary injury in TBI is associated with contusions and axonal shearing whereas excitotoxicity, mitochondrial dysfunction, free radicals generation, and neuroinflammation are considered under secondary injury. MicroRNAs, proinflammatory cytokines, and Glial fibrillary acidic protein (GFAP) recently emerged as biomarkers in TBI. In addition, several approved therapeutic entities have been explored to target existing and newly identified drug-targets in TBI. However, drug delivery in TBI is hampered due to disruption of blood-brain barrier (BBB) in secondary TBI, as well as inadequate drug-targeting and retention effect. Colloidal therapeutics appeared helpful in providing enhanced drug availability to the brain owing to definite targeting strategies. Moreover, immense efforts have been put together to achieve increased bioavailability of therapeutics to TBI by devising effective targeting strategies. The potential of colloidal therapeutics to efficiently deliver drugs at the site of injury and down-regulate the mediators of TBI are serving as novel policies in the management of TBI. Therefore, in present manuscript, we have illuminated a myriad of molecular-targets currently identified and recognized in TBI. Moreover, particular emphasis is given to frame armamentarium of repurpose drugs which could be utilized to block molecular targets in TBI in addition to drug delivery barriers. The critical role of colloidal therapeutics such as liposomes, nanoparticles, dendrimers, and exosomes in drug delivery to TBI through invasive and non-invasive routes has also been highlighted.
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Affiliation(s)
- Shristi Arya
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Deepankar Bahuguna
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Gopal Bajad
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Soham Loharkar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Pawan Devangan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Dharmendra Kumar Khatri
- Department of Biological Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Shashi Bala Singh
- Department of Biological Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Jitender Madan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India.
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Quan W, Xu CS, Li XC, Yang C, Lan T, Wang MY, Yu DH, Tang F, Wang ZF, Li ZQ. Telmisartan inhibits microglia-induced neurotoxic A1 astrocyte conversion via PPARγ-mediated NF-κB/p65 degradation. Int Immunopharmacol 2023; 123:110761. [PMID: 37544025 DOI: 10.1016/j.intimp.2023.110761] [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: 05/25/2023] [Revised: 07/25/2023] [Accepted: 08/01/2023] [Indexed: 08/08/2023]
Abstract
Astrocytes are crucially involved in neuroinflammation. Activated astrocytes exhibit at least two phenotypes, A1 (neurotoxic) and A2 (neuroprotective). The A1 phenotype is the major reactive astrocyte phenotype involved in aging and neurodegenerative diseases. Telmisartan, which is an antihypertensive agent, is a promising neuroprotective agent. This study aimed to investigate the effects of telmisartan on the phenotype of reactive astrocytes. Astrocytes were activated by culturing with the conditioned medium derived from lipopolysaccharide-stimulated microglia. This conditioned medium induced early, transient A2 astrocyte conversion (within 24 h) and late, sustained A1 conversion (beginning at 24 h and lasting up to 7 days), with a concomitant increase in the production of pro-inflammatory cytokines (interleukin [IL]-1β, tumor necrosis factor [TNF]α, and IL-6) and phosphorylation of nuclear factor-κB (NF-κB)/p65. Telmisartan treatment promoted and inhibited A2 and A1 conversion, respectively. Telmisartan reduced total and phosphorylated p65 protein levels. Losartan, a specific angiotensin II type-1 receptor (AT1R) blocker, did not influence the reactive state of astrocytes. Additionally, AT1R activation by angiotensin II did not induce the expression of pro-inflammatory cytokines and A1/A2 markers, indicating that the AT1R signaling pathway is not involved in the astrocyte-mediated inflammatory response. A peroxisome proliferator-activated receptor γ (PPARγ) antagonist reversed the effects of telmisartan. Moreover, telmisartan-induced p65 downregulation was reversed by the proteasome inhibitor MG132. These results indicate that telmisartan suppresses activated microglia-induced neurotoxic A1 astrocyte conversion through p65 degradation. Our findings contribute towards the elucidation of the anti-inflammatory activity of telmisartan in brain disorders.
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Affiliation(s)
- Wei Quan
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Cheng-Shi Xu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Xiao-Chong Li
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Chao Yang
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Tian Lan
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Meng-Yue Wang
- Department of Physiology, Wuhan University School of Basic Medical Sciences, Wuhan, Hubei, China
| | - Dong-Hu Yu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Feng Tang
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Ze-Fen Wang
- Department of Physiology, Wuhan University School of Basic Medical Sciences, Wuhan, Hubei, China.
| | - Zhi-Qiang Li
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China; Brain Glioma Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.
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Solana‐Balaguer J, Campoy‐Campos G, Martín‐Flores N, Pérez‐Sisqués L, Sitjà‐Roqueta L, Kucukerden M, Gámez‐Valero A, Coll‐Manzano A, Martí E, Pérez‐Navarro E, Alberch J, Soriano J, Masana M, Malagelada C. Neuron-derived extracellular vesicles contain synaptic proteins, promote spine formation, activate TrkB-mediated signalling and preserve neuronal complexity. J Extracell Vesicles 2023; 12:e12355. [PMID: 37743539 PMCID: PMC10518375 DOI: 10.1002/jev2.12355] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 07/21/2023] [Indexed: 09/26/2023] Open
Abstract
Extracellular vesicles (EVs) play an important role in intercellular communication as carriers of signalling molecules such as bioactive miRNAs, proteins and lipids. EVs are key players in the functioning of the central nervous system (CNS) by influencing synaptic events and modulating recipient neurons. However, the specific role of neuron-to-neuron communication via EVs is still not well understood. Here, we provide evidence that primary neurons uptake neuron-derived EVs in the soma, dendrites, and even in the dendritic spines, and carry synaptic proteins. Neuron-derived EVs increased spine density and promoted the phosphorylation of Akt and ribosomal protein S6 (RPS6), via TrkB-signalling, without impairing the neuronal network activity. Strikingly, EVs exerted a trophic effect on challenged nutrient-deprived neurons. Altogether, our results place EVs in the spotlight for synaptic plasticity modulation as well as a possible therapeutic tool to fight neurodegeneration.
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Affiliation(s)
- Julia Solana‐Balaguer
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
| | - Genís Campoy‐Campos
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
| | - Núria Martín‐Flores
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
| | - Leticia Pérez‐Sisqués
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
| | - Laia Sitjà‐Roqueta
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Melike Kucukerden
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Ana Gámez‐Valero
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Biomedical Research Networking Center for Epidemiology and Public Health (CIBERESP)MadridSpain
| | - Albert Coll‐Manzano
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Eulàlia Martí
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Biomedical Research Networking Center for Epidemiology and Public Health (CIBERESP)MadridSpain
| | - Esther Pérez‐Navarro
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Jordi Alberch
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Jordi Soriano
- Departament de Física de la Matèria CondensadaUniversitat de BarcelonaBarcelonaSpain
- Universitat de Barcelona, Institute of Complex Systems (UBICS)Universitat de BarcelonaBarcelonaSpain
| | - Mercè Masana
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)BarcelonaSpain
| | - Cristina Malagelada
- Departament de Biomedicina, Institut de Neurociències (UBneuro)Universitat de BarcelonaBarcelonaSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED)MadridSpain
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Yazdanpanah Z, Ghasemzadeh Rahbardar M, Razavi BM, Hosseinzadeh H. Investigating the effect of telmisartan on acrylamide-induced neurotoxicity through in vitro and in vivo methods. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2023; 26:1024-1029. [PMID: 37605730 PMCID: PMC10440133 DOI: 10.22038/ijbms.2023.69636.15167] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 04/19/2023] [Indexed: 08/23/2023]
Abstract
Objectives Acrylamide (ACR) is an environmental contaminant and neurotoxin. Telmisartan is an AT1 blocker that has neuroprotective properties basically through its anti-oxidant effect. The effect of telmisartan on ACR-induced neurotoxicity was investigated in this study. Materials and Methods Male Wistar rats were randomly assigned to eight groups (n=6): 1:Control (normal saline), 2:ACR (50 mg/kg, 11 days, IP), 3:ACR+vitamin E (200 mg/kg, every other day, 11 days), 4-6:ACR+telmisartan (0.6, 1.25, and 2.5 mg/kg, 11 days, IP), 7:ACR+telmisartan (0.6 mg/kg, days 3-11), 8:Telmisartan (2.5 mg/kg, 11 days). The behavioral test and blood pressure were assessed after 11 days. Then, the levels of MDA and GSH in brain tissue were measured. The MTT assay was used to evaluate the effect of telmisartan on ACR-induced cytotoxicity. Results Exposing PC12 cells to ACR decreased cell viability versus the control group. Pretreating PC12 cells with telmisartan (0.0125, 0.025 µM) enhanced cell viability compared with the ACR group. Compared with control samples, ACR significantly caused motor impairment, elevated MDA, and reduced GSH levels. Locomotor abnormalities were significantly ameliorated by telmisartan (0.6, 1.25 mg/kg, 11 days) and vitamin E versus the ACR group. Receiving telmisartan (0.6, 1.25, and 2.5 mg/kg) and vitamin E along with ACR decreased MDA levels and enhanced GSH content compared with the ACR group. There was no significant difference in animal blood pressure between the groups. Conclusion Oxidative stress has a chief role in the neurotoxicity of ACR. Telmisartan (in doses that do not affect blood pressure) ameliorated ACR-induced toxicity by inhibiting oxidative stress.
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Affiliation(s)
- Zahra Yazdanpanah
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Bibi Marjan Razavi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Hosseinzadeh
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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5
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Zhu J, Wang L, Li X, Lan D, Song L, Li Y, Cheng Y, Zhang P. Transcriptome analysis alk-SMase knockout mice reveals the effect of alkaline sphingomyelinase on liver. Biochem Biophys Rep 2022; 30:101240. [PMID: 35360085 PMCID: PMC8961189 DOI: 10.1016/j.bbrep.2022.101240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/21/2022] [Accepted: 02/26/2022] [Indexed: 11/25/2022] Open
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Mansour RM, El Sayed NS, Ahmed MAE, El-Sahar AE. Addressing Peroxisome Proliferator-Activated Receptor-gamma in 3-Nitropropionic Acid-Induced Striatal Neurotoxicity in Rats. Mol Neurobiol 2022; 59:4368-4383. [PMID: 35553009 PMCID: PMC9167199 DOI: 10.1007/s12035-022-02856-w] [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: 01/27/2022] [Accepted: 04/27/2022] [Indexed: 11/28/2022]
Abstract
Telmisartan (TEL) is an angiotensin II type 1 receptor blocker and a partial activator of peroxisome proliferator-activated receptor-gamma (PPARγ), which regulates inflammatory and apoptotic pathways. Increasing evidence has demonstrated the PPARγ agonistic property of TEL in several brain disorders. This study aims to explore the neuroprotective impact of TEL in 3-nitropropionic acid (3-NP)-induced neurotoxicity in rats. The PPARγ effect of TEL was affirmed by using the PPARγ agonist pioglitazone (PIO), and the antagonist GW9662. 3-NP led to a significant reduction in body weight alongside motor and cognitive functioning. The striata of the 3-NP-treated rats showed energy-deficit, microglia-mediated inflammatory reactions, apoptotic damage as well as histopathological lesions. PIO and TEL improved motor and cognitive perturbations induced by 3-NP, as confirmed by striatal histopathological examination, energy restoration, and neuronal preservation. Both drugs improved mitochondrial biogenesis evidenced by elevated mRNA expression of PPARγ, PGC-1α, and TFAM, alongside increased striatal ATP and SDH. The mitochondrial effect of TEL was beyond PPARγ activation. As well, their anti-inflammatory effect was attributed to suppression of microglial activation, and protein expression of pS536 p65 NF-κB with marked attenuation of striatal inflammatory mediator's release. Anti-inflammatory cytokine IL-10 expression was concurrently increased. TEL effectively participated in neuronal survival as it promoted phosphorylation of Akt/GSK-3β, further increased Bcl-2 expression, and inhibited cleavage of caspase-3. Interestingly, co-treatment with GW9662 partially revoked the beneficial effects of TEL. These findings recommend that TEL improves motor and cognitive performance, while reducing neuronal inflammation and apoptosis in 3-NP-induced neurotoxicity via a PPARγ-dependent mechanism.
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Affiliation(s)
- Riham M Mansour
- Department of Pharmacology and Toxicology, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6Th of October City, Giza, Egypt.
| | - Nesrine S El Sayed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
| | - Maha A E Ahmed
- Department of Pharmacology and Toxicology, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6Th of October City, Giza, Egypt
| | - Ayman E El-Sahar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
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Xing CH, Wang Y, Liu JC, Pan ZN, Zhang HL, Sun SC, Zhang Y. Melatonin reverses mitochondria dysfunction and oxidative stress-induced apoptosis of Sudan I-exposed mouse oocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 225:112783. [PMID: 34544023 DOI: 10.1016/j.ecoenv.2021.112783] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/07/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Sudan I is one of the industry dyes and widely used in cosmetics, wax agent, solvent and textile. Sudan I has multiple toxicity such as carcinogenicity, mutagenicity, genotoxicity and oxidative damage. However, Sudan I has been illegally used as colorant in food products, triggering worldwide attention about food safety. Nevertheless, the toxicity of Sudan I on reproduction, particularly on oocyte maturation is still unclear. In the present study, using mouse in vivo models, we report the toxicity effects of Sudan I on mouse oocyte. The results reflect that Sudan I exposure disrupts spindle organization and chromosomes alignment as well as cortical actin distribution, thus leading to the failure of polar body extrusion. Based on the transcriptome results, it is found that the exposure of Sudan I leads to the change in expression of 764 genes. Moreover, it's further reflected that the damaging effects of Sudan I are mediated by the destruction of mitochondrial functions, which induces the accumulated ROS to stimulate oxidative stress-induced apoptosis. As an endogenous hormone, melatonin within the ovarian follicle plays function on improving oocyte quality and female reproduction by efficiently suppressing oxidative stress. Moreover, melatonin supplementation also improves oocyte quality and increases fertilization rate during in vitro culture. Consistent with these, we find that in vivo supplementation of melatonin efficaciously suppresses mitochondrial dysfunction and the accompanying apoptosis, thus reverses oocyte meiotic deteriorations. Collectively, our results prove the reproduction toxicity of Sudan I for the exposure of Sudan I reduces the oocyte quality, and demonstrate the protective effects of melatonin against Sudan I-induced meiotic deteriorations.
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Affiliation(s)
- Chun-Hua Xing
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yue Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jing-Cai Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhen-Nan Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Hao-Lin Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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8
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Sordo L, Gunn-Moore DA. Cognitive Dysfunction in Cats: Update on Neuropathological and Behavioural Changes Plus Clinical Management. Vet Rec 2021; 188:e3. [PMID: 34651755 DOI: 10.1002/vetr.3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Cognitive dysfunction syndrome (CDS) is an established condition in cats that shares many similarities with human Alzheimer's disease (AD), where cognitive decline ultimately results in dementia. Cats with CDS display behavioural abnormalities, including excessive Vocalisation, altered Interaction with owners (increased affection/attention), altered Sleep-wake cycles, House-soiling, Disorientation (spatial and/or temporal), alterations in Activity, Anxiety, and/or Learning/memory deficits (i.e., VISHDAAL). These cats develop neuropathologies, such as accumulation of β-amyloid and hyperphosphorylated tau deposits. Because of its similarities to those in the brains of people with cognitive impairment and AD, the domestic cat could be a natural model for human dementia studies. It is important to diagnose CDS promptly in cats, ruling out other causes for these behavioural changes, to provide effective management. Interventions include environmental enrichment (e.g., easy access to key resources, calming pheromones), dietary supplementations (e.g., Senilife, Aktivait for cats, SAMe), specific diets (e.g., containing antioxidants, medium-chain triglycerides) and, potentially, medication (e.g., selegiline or propentofylline). This article reviews the literature about CDS in cats, its causes, neuropathology, clinical signs, diagnosis and potential management options. By doing so, it furthers our understanding of this condition and allows improved health, welfare and quality of life of affected cats.
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Affiliation(s)
- Lorena Sordo
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush Campus, Roslin, UK
| | - Danièlle A Gunn-Moore
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush Campus, Roslin, UK
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9
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Bernardo A, Malara M, Bertuccini L, De Nuccio C, Visentin S, Minghetti L. The Antihypertensive Drug Telmisartan Protects Oligodendrocytes from Cholesterol Accumulation and Promotes Differentiation by a PPAR-γ-Mediated Mechanism. Int J Mol Sci 2021; 22:ijms22179434. [PMID: 34502342 PMCID: PMC8431237 DOI: 10.3390/ijms22179434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 12/13/2022] Open
Abstract
Our previous studies have demonstrated that specific peroxisome proliferator-activated receptor-γ (PPAR-γ) agonists play a fundamental role in oligodendrocyte progenitor (OP) differentiation, protecting them against oxidative and inflammatory damage. The antihypertensive drug Telmisartan (TLM) was shown to act as a PPAR-γ modulator. This study investigates the TLM effect on OP differentiation and validates its capability to restore damage in a pharmacological model of Niemann-Pick type C (NPC) disease through a PPAR-γ-mediated mechanism. For the first time in purified OPs, we demonstrate that TLM-induced PPAR-γ activation downregulates the type 1 angiotensin II receptor (AT1), the level of which naturally decreases during differentiation. Like other PPAR-γ agonists, we show that TLM promotes peroxisomal proliferation and promotes OP differentiation. Furthermore, TLM can offset the OP maturation arrest induced by a lysosomal cholesterol transport inhibitor (U18666A), which reproduces an NPC1-like phenotype. In the NPC1 model, TLM also reduces cholesterol accumulation within peroxisomal and lysosomal compartments and the contacts between lysosomes and peroxisomes, revealing that TLM can regulate intracellular cholesterol transport, crucial for myelin formation. Altogether, these data indicate a new potential use of TLM in hypomyelination pathologies such as NPC1, underlining the possible repositioning of the drug already used in other pathologies.
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Affiliation(s)
- Antonietta Bernardo
- National Center for Research and Preclinical and Clinical Evaluation of Drugs, Istituto Superiore di Sanità, 00169 Rome, Italy;
- Correspondence: ; Tel.: +39-06-4990-2927
| | | | - Lucia Bertuccini
- Core Facilities, Istituto Superiore di Sanità, 00169 Rome, Italy;
| | - Chiara De Nuccio
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00169 Rome, Italy; (C.D.N.); (L.M.)
| | - Sergio Visentin
- National Center for Research and Preclinical and Clinical Evaluation of Drugs, Istituto Superiore di Sanità, 00169 Rome, Italy;
| | - Luisa Minghetti
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00169 Rome, Italy; (C.D.N.); (L.M.)
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10
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Kim H, Sim H, Lee JE, Seo MK, Lim J, Bang Y, Nam D, Lee SY, Chung SK, Choi HJ, Park SW, Son I, Kim J, Seol W. Ciliogenesis is Not Directly Regulated by LRRK2 Kinase Activity in Neurons. Exp Neurobiol 2021; 30:232-243. [PMID: 34230223 PMCID: PMC8278138 DOI: 10.5607/en21003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/28/2021] [Accepted: 05/14/2021] [Indexed: 11/19/2022] Open
Abstract
Mutations in the Leucine-rich repeat kinase 2 (LRRK2) gene are the most prevalent cause of familial Parkinson’s disease (PD). The increase in LRRK2 kinase activity observed in the pathogenic G2019S mutation is important for PD development. Several studies have reported that increased LRRK2 kinase activity and treatment with LRRK2 kinase inhibitors decreased and increased ciliogenesis, respectively, in mouse embryonic fibroblasts (MEFs) and retinal pigment epithelium (RPE) cells. In contrast, treatment of SH-SY5Y dopaminergic neuronal cells with PD-causing chemicals increased ciliogenesis. Because these reports were somewhat contradictory, we tested the effect of LRRK2 kinase activity on ciliogenesis in neurons. In SH-SY5Y cells, LRRK2 inhibitor treatment slightly increased ciliogenesis, but serum starvation showed no increase. In rat primary neurons, LRRK2 inhibitor treatment repeatedly showed no significant change. Little difference was observed between primary cortical neurons prepared from wild-type (WT) and G2019S+/- mice. However, a significant increase in ciliogenesis was observed in G2019S+/- compared to WT human fibroblasts, and this pattern was maintained in neural stem cells (NSCs) differentiated from the induced pluripotent stem cells (iPSCs) prepared from the same WT/G2019S fibroblast pair. NSCs differentiated from G2019S and its gene-corrected WT counterpart iPSCs were also used to test ciliogenesis in an isogenic background. The results showed no significant difference between WT and G2019S regardless of kinase inhibitor treatment and B27-deprivation-mimicking serum starvation. These results suggest that LRRK2 kinase activity may be not a direct regulator of ciliogenesis and ciliogenesis varies depending upon the cell type or genetic background.
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Affiliation(s)
- Hyejung Kim
- InAm Neuroscience Research Center, Sanbon Medical Center, College of Medicine, Wonkwang University, Gunpo 15865, Korea
| | - Hyuna Sim
- Stem Cell Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, Korea
| | - Joo-Eun Lee
- Stem Cell Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea
| | - Mi Kyoung Seo
- Paik Institute for Clinical Research, Inje University College of Medicine, Busan 47392, Korea
| | - Juhee Lim
- College of Pharmacy, CHA University, Seongnam 13496, Korea
| | - Yeojin Bang
- College of Pharmacy, CHA University, Seongnam 13496, Korea
| | - Daleum Nam
- InAm Neuroscience Research Center, Sanbon Medical Center, College of Medicine, Wonkwang University, Gunpo 15865, Korea
| | - Seo-Young Lee
- Division of Clinical Medicine, Korea Institute of Oriental Medicine, Daejeon 34054, Korea
| | - Sun-Ku Chung
- Division of Herbal Medicine Research, Korea Institute of Oriental Medicine, Daejeon 34054, Korea
| | - Hyun Jin Choi
- College of Pharmacy, CHA University, Seongnam 13496, Korea
| | - Sung Woo Park
- Paik Institute for Clinical Research, Inje University College of Medicine, Busan 47392, Korea.,Department of Convergence Biomedical Science, Inje University College of Medicine, Busan 47392, Korea
| | - Ilhong Son
- InAm Neuroscience Research Center, Sanbon Medical Center, College of Medicine, Wonkwang University, Gunpo 15865, Korea.,Department of Neurology, Sanbon Medical Center, College of Medicine, Wonkwang University, Gunpo 15865, Korea
| | - Janghwan Kim
- Stem Cell Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, Korea
| | - Wongi Seol
- InAm Neuroscience Research Center, Sanbon Medical Center, College of Medicine, Wonkwang University, Gunpo 15865, Korea
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11
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Kwon HS, Ha J, Kim JY, Park HH, Lee EH, Choi H, Lee KY, Lee YJ, Koh SH. Telmisartan Inhibits the NLRP3 Inflammasome by Activating the PI3K Pathway in Neural Stem Cells Injured by Oxygen-Glucose Deprivation. Mol Neurobiol 2021; 58:1806-1818. [PMID: 33404978 DOI: 10.1007/s12035-020-02253-1] [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: 04/12/2020] [Accepted: 12/08/2020] [Indexed: 01/01/2023]
Abstract
Angiotensin II receptor blockers (ARBs) have been shown to exert neuroprotective effects by suppressing inflammatory and apoptotic responses. In the present study, the effects of the ARB telmisartan on the NLRP3 inflammasome induced by oxygen-glucose deprivation (OGD) in neural stem cells (NSCs) were investigated, as well as their possible association with the activation of the PI3K pathway. Cultured NSCs were treated with different concentrations of telmisartan and subjected to various durations of OGD. Cell counting, lactate dehydrogenase, bromodeoxyuridine, and colony-forming unit assays were performed to measure cell viability and proliferation. In addition, the activity of intracellular signaling pathways associated with the PI3K pathway and NLRP3 inflammasome was evaluated. Telmisartan alone did not affect NSCs up to a concentration of 10 μM under normal conditions but showed toxicity at a concentration of 100 μM. Moreover, OGD reduced the viability of NSCs in a time-dependent manner. Nevertheless, treatment with telmisartan increased the viability and proliferation of OGD-injured NSCs. Furthermore, telmisartan promoted the expression of survival-related proteins and mRNA while inhibiting the expression of death-related proteins induced by OGD. In particular, telmisartan attenuated OGD-dependent expression of the NLRP3 inflammasome and its related signaling proteins. These beneficial effects of telmisartan were blocked by a PI3K inhibitor. Together, these results indicate that telmisartan attenuated the activation of the NLRP3 inflammasome by triggering the PI3K pathway, thereby contributing to neuroprotection.
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Affiliation(s)
- Hyuk Sung Kwon
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
| | - Jungsoon Ha
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
- GemVax & Kael Co., Ltd, Seongnam-si, Republic of Korea
| | - Ji Young Kim
- Department of Nuclear Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea
| | - Hyun-Hee Park
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
| | - Eun-Hye Lee
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
- Department of Translational Medicine, Hanyang University Graduate School of Biomedical Science & Engineering, Seoul, Republic of Korea
| | - Hojin Choi
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
| | - Kyu-Yong Lee
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
| | - Young Joo Lee
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea
| | - Seong-Ho Koh
- Department of Neurology, Hanyang University Guri Hospital, 153, Gyeongchun-ro, Guri, 11923, South Korea.
- Department of Translational Medicine, Hanyang University Graduate School of Biomedical Science & Engineering, Seoul, Republic of Korea.
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12
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Abo-Youssef AM, Khallaf WA, Khattab MM, Messiha BA. The anti-Alzheimer effect of telmisartan in a hyperglycemic ovariectomized rat model; role of central angiotensin and estrogen receptors. Food Chem Toxicol 2020; 142:111441. [DOI: 10.1016/j.fct.2020.111441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 05/14/2020] [Accepted: 05/17/2020] [Indexed: 12/19/2022]
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13
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Cortada M, Wei E, Jain N, Levano S, Bodmer D. Telmisartan Protects Auditory Hair Cells from Gentamicin-Induced Toxicity in vitro. Audiol Neurootol 2020; 25:297-308. [PMID: 32369826 DOI: 10.1159/000506796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 02/13/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Telmisartan is an angiotensin II receptor blocker that has pleiotropic effects and protective properties in different cell types. Moreover, telmisartan has also shown partial agonism on the peroxisome proliferator-activated receptor γ (PPAR-γ). Auditory hair cells (HCs) express PPAR-γ, and the protective role of PPAR-γ agonists on HCs has been shown. OBJECTIVES The objective of this study was to investigate the effects of telmisartan on gentamicin-induced ototoxicity in vitro. METHODS Cochlear explants were exposed to gentamicin with or without telmisartan, and/or GW9662, an irreversible PPAR-γ antagonist. RESULTS Telmisartan protected auditory HCs against gentamicin-induced ototoxicity. GW9662 completely blocked this protective effect, suggesting that it was mediated by PPAR-γ signaling. Exposure to GW9662 or telmisartan alone was not toxic to auditory HCs. CONCLUSIONS We found that telmisartan, via PPAR-γ signaling, protects auditory HCs from gentamicin-induced ototoxicity. Therefore, telmisartan could potentially be used in the future to prevent or treat sensorineural hearing loss.
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Affiliation(s)
- Maurizio Cortada
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Eric Wei
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Neha Jain
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Soledad Levano
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Daniel Bodmer
- Clinic for Otolaryngology, Head and Neck Surgery, University of Basel Hospital, Basel, Switzerland,
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14
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Lan M, Zhang Y, Wan X, Pan MH, Xu Y, Sun SC. Melatonin ameliorates ochratoxin A-induced oxidative stress and apoptosis in porcine oocytes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 256:113374. [PMID: 31672358 DOI: 10.1016/j.envpol.2019.113374] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/08/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Melatonin is a hormone which is generated from pineal gland, and it is responsible for the regulation of wake-sleep cycle. Melatonin is a well-known antioxidant and free radical scavenger to protect against multiple type of tissue damage. While ochratoxin A (OTA) is a mycotoxin found widely in contaminated food and foodstuffs, which causes nephrotoxicity, hepatotoxicity, immunotoxicity, and reproductive damage in humans and animals. In present study we report the toxicity of OTA on porcine oocyte quality and the protective effects of melatonin on OTA-exposed oocytes. Using transcriptome analysis our results show that OTA exposure alters the expression of multiple genes in oocytes, indicating its effect on oocyte maturation. The cellular changes following OTA treatment are examined, and the results show that OTA adversely affects oocyte polar body extrusion, which is confirmed by the delay of Cdc2-mediated cell cycle progression. OTA exposure also disrupts meiotic spindle formation, which is confirmed by altered phosphorylated MAPK expression. RNA-seq screening and further fluorescence staining results show that OTA induces aberrant mitochondria distribution and oxidative phosphorylation defects, which then causes oxidative stress, followed by early apoptosis and autophagy. Treatment with melatonin significantly ameliorates oxidative stress and apoptosis, which further protects cell cycle and spindle formation in OTA-exposed oocytes. Collectively, these results show the protective effects of melatonin against defects induced by OTA during porcine meiotic oocyte maturation.
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Affiliation(s)
- Mei Lan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiang Wan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Meng-Hao Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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15
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Liu Y, Chen S, Liu J, Jin Y, Yu S, An R. Telmisartan inhibits oxalate and calcium oxalate crystal-induced epithelial-mesenchymal transformation via PPAR-γ-AKT/STAT3/p38 MAPK-Snail pathway. Life Sci 2019; 241:117108. [PMID: 31786192 DOI: 10.1016/j.lfs.2019.117108] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/10/2019] [Accepted: 11/26/2019] [Indexed: 12/26/2022]
Abstract
AIMS Telmisartan (TLM), a highly selective angiotensin II type 1 receptor blocker (ARB) and partial PPAR-γ agonist, has versatile beneficial effects against oxidative stress, apoptosis, inflammatory responses and epithelial-mesenchymal transition (EMT). However, its underlying mechanism of inhibiting oxalate and calcium oxalate (CaOx) crystal-induced EMT by activating the PPAR-γ pathway remains unclear. MAIN METHODS CCK-8 assays were used to evaluate the effects of TLM on cell viability. In addition, intracellular reactive oxygen species (ROS) levels were measured by the cell-permeable fluorogenic probe 2,7-dichlorofluorescein diacetate (DCFH-DA). Wound-healing and Transwell assays were used to evaluate the migration ability of HK2 cells exposed to oxalate. Moreover, immunofluorescence, immunohistochemistry and western blotting were used to examine the expression of E-cadherin, N-cadherin, vimentin and α-SMA and explore the underlying molecular mechanisms in HK2 cells and a stone-forming rat model. KEY FINDINGS Our results showed that TLM treatment could protect HK2 cells from oxalate-induced cytotoxicity and oxidative stress injury. Additionally, TLM prevented EMT induction by oxalate and CaOx crystals via the PPAR-γ-AKT/STAT3/p38 MAPK-Snail pathway in vitro and in vivo. However, knockdown of PPAR-γ with small interfering RNA or the PPAR-γ-specific antagonist GW9662 abrogated these protective effects of TLM. SIGNIFICANCE As a PPAR-γ agonist, TLM can ameliorate oxalate and CaOx crystal-induced EMT by exerting an antioxidant effect through the PPAR-γ-AKT/STAT3/p38 MAPK-Snail signaling pathway. Therefore, TLM can block EMT progression and could be a potential therapeutic agent for preventing and treating calcium oxalate urolithiasis formation and recurrence.
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Affiliation(s)
- Yadong Liu
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China
| | - Song Chen
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China
| | - Jiannan Liu
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China
| | - Yinshan Jin
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China
| | - Shiliang Yu
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China.
| | - Ruihua An
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, No.23 You Zheng Street, Harbin 150001, Heilongjiang, China.
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16
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王 虎, 樊 嘉, 陈 婉, 高 震, 张 桂, 吴 海, 俞 小. [Activation of PPARγ pathway enhances cellular anti-oxidant capacity to protect long-term cultured primary rat neural cells from apoptosis]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2019; 39:23-29. [PMID: 30692062 PMCID: PMC6765588 DOI: 10.12122/j.issn.1673-4254.2019.01.04] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To study the protective effect of enhanced peroxisome proliferator activated receptor γ (PPARγ) pathway against apoptosis of long-term cultured primary nerve cells. METHODS A natural aging model was established in primary rat nerve cells by long-term culture for 22 days. The cells were divided into control group, 0.1, 1.0, 5.0, and 10 μmol/L GW9662 intervention groups, and 0.1, 1.0, 5.0, and 10 μmol/L pioglitazone intervention groups. The cell viability was assessed using MTT assay and the cell morphological changes were observed after the treatments to determine the optimal concentrations of GW9662 and pioglitazone. Double immunofluorescence labeling and flow cytometry were used to observe the changes in the number of viable cells and cell apoptosis following the treatments; immunocytochemical staining was used to assess the changes in the anti-oxidation ability of the treated cells. RESULTS The optimal concentrations of GW9662 and pioglitazone determined based on the cell viability and morphological changes were both 1 μmol/L. Compared with the control group, GW9662 treatment significantly lowered while pioglitazone significantly increased the total cell number and nerve cell counts (P < 0.05), and nerve cells in the cell cultures maintained a constant ratio at about 80% in all the groups (P > 0.05). GW9662 significantly enhanced while pioglitazone significantly lowered the cell apoptosis rates compared with the control group (P < 0.05). GW9662 obviously lowered SOD activity and GSH content in G group (P < 0.05) and increased MDA content in the cells (P < 0.05), and pioglitazone resulted in reverse changes in SOD, GSH and MDA contents in the cells (P < 0.05). CONCLUSIONS Activation of PPARγ pathway protects long-term cultured primary nerve cells by enhancing cellular anti-oxidant capacity and reducing cell apoptosis, suggesting a potential strategy for anti-aging treatment of the nervous system through intervention of the PPARγ pathway.
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Affiliation(s)
- 虎清 王
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 嘉欣 樊
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 婉莹 陈
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 震 高
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 桂莲 张
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 海琴 吴
- 西安交通大学医学院第二附属医院神经内科,陕西 西安 710004Department of Neurology, Xi'an Jiaotong University Second Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
| | - 小瑞 俞
- 西安交通大学医学院医学中心生物化学和分子生物学系,陕西 西安 710004Department of Biochemistry and Molecular Biology, Xi'an Jiaotong University Health Science Center, Xi'an 710004, China
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17
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Wen J, Zeng M, Liu Z, Zhou H, Xu H, Huang M, Zhang W. The influence of telmisartan on metformin pharmacokinetics and pharmacodynamics. J Pharmacol Sci 2018; 139:37-41. [PMID: 30538075 DOI: 10.1016/j.jphs.2018.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 11/01/2018] [Accepted: 11/19/2018] [Indexed: 02/05/2023] Open
Abstract
Metformin is the most widely used drug among type 2 diabetes mellitus patients. However, drug interaction on metformin will influence its glucose-lowering effect or increase its side effect of lactic acidosis. In this study, a randomized, two-stage, crossover study was conducted to unveil the potential drug interaction between metformin and the anti-hypertension drug, telmisartan. Totally, 16 healthy Chinese male volunteers were enrolled. Blood samples from various time-points after drug adminstration were analyzed for metformin quantification. Oral glucose tolerance test (OGTT) was conducted 2 h after metformin administration. The AUC0-12 and Cmax of metformin in subjects co-administrated with telmisartan were significantly lower than with placebo. The geometric mean ratios (value of metformin plus telmisartan phase/value of metformin plus placebo phase) for Cmax and AUC0-12 is 0.7972 (90%CI: 0.7202-0.8824) and 0.8336 (90%CI: 0.7696-0.9028), respectively. Moreover, telmisartan co-administration significantly increased the plasma concentrations of both glucose and insulin at 0.5 h since OGTT (7.64 ± 1.86 mmol/l·min vs 6.77 ± 0.83 mmol/l·min, P = 0.040; 72.91 ± 31.98 μIU/ml·min vs 60.20 ± 24.20 μIU/ml·min, P = 0.037), though the AUC of glucose and insulin after OGTT showed no significant difference. These findings suggested that telmisartan had a significant influence on the Pharmacokinetics of metformin in healthy groups, though the influence on glucose-lowering effect was moderate.
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Affiliation(s)
- Jiagen Wen
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; School of Pharmacy, Anhui Medical University, Hefei, Anhui, China
| | - Meizi Zeng
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Zhaoqian Liu
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Hunan Key Laboratory of Pharmacogenetics, Changsha, Hunan, China
| | - Honghao Zhou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Hunan Key Laboratory of Pharmacogenetics, Changsha, Hunan, China
| | - Heng Xu
- Department of Laboratory Medicine, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Min Huang
- School of Pharmaceutical Science, Sun Yat-Sen University, GuangZhou, GuangDong, China
| | - Wei Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Hunan Key Laboratory of Pharmacogenetics, Changsha, Hunan, China.
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18
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Du GT, Ke X, Meng GL, Liu GJ, Wu HY, Gong JH, Qian XD, Cheng JL, Hong H. Telmisartan attenuates hydrogen peroxide-induced apoptosis in differentiated PC12 cells. Metab Brain Dis 2018; 33:1327-1334. [PMID: 29721772 DOI: 10.1007/s11011-018-0237-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 04/06/2018] [Indexed: 12/22/2022]
Abstract
The present study investigated the protective actions of telmisartan, an angiotensin II type 1 receptor blocker (ARBs), against the cell apoptosis induced by exposure to hydrogen peroxide (H2O2) in differentiated PC12 cells. Preincubation of PC12 cells with telmisartan prevented H2O2-induced cytotoxicity as indicated by increased MTT (3,(4,5-dimethylthiazole-2-yl)2,5-diphenyl-tetrazolium bromide) reduction, decreased lactate dehydrogenase (LDH) release, and improved morphological changes. Hoechst 33,258 staining showed that telmisartan markedly reduced shrunken nuclei of the cells, and Western blot analysis indicated that telmisartan significantly attenuated caspase-3 activity, as indicated by decreased ratio of cleaved Caspase-3 to its precursor and increased ratio of Bcl-2/Bax. The present findings showed that telmisartan protected against cellular oxidative damages by inhibiting apoptotic response.
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Affiliation(s)
- Guan Tao Du
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China
| | - Xuan Ke
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 210009, China
| | - Guo Liang Meng
- School of Pharmacy, Nantong University, Nantong, 226001, Jiangsu, China
| | - Guang Jun Liu
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China
| | - Hui Ying Wu
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China
| | - Jin Hong Gong
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China
| | - Xiao Dan Qian
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China
| | - Jin Luo Cheng
- Department of Pharmacy, Department of Endocrinology, Changzhou No. 2 People's Hospital Affiliated with Nanjing Medical University, Changzhou, 213003, China.
| | - Hao Hong
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 210009, China.
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Bali A, Jaggi AS. Angiotensin II-triggered kinase signaling cascade in the central nervous system. Rev Neurosci 2018; 27:301-15. [PMID: 26574890 DOI: 10.1515/revneuro-2015-0041] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 09/26/2015] [Indexed: 12/26/2022]
Abstract
Recent studies have projected the renin-angiotensin system as a central component of the physiological and pathological processes of assorted neurological disorders. Its primary effector hormone, angiotensin II (Ang II), not only mediates the physiological effects of vasoconstriction and blood pressure regulation in cardiovascular disease but is also implicated in a much wider range of neuronal activities and diseases, including Alzheimer's disease, neuronal injury, and cognitive disorders. Ang II produces different actions by acting on its two subtypes of receptors (AT1 and AT2); however, the well-known physiological actions of Ang II are mainly mediated through AT1 receptors. Moreover, recent studies also suggest the important functional role of AT2 receptor in the brain. Ang II acts on AT1 receptors and conducts its functions via MAP kinases (ERK1/2, JNK, and p38MAPK), glycogen synthase kinase, Rho/ROCK kinase, receptor tyrosine kinases (PDGF and EGFR), and nonreceptor tyrosine kinases (Src, Pyk2, and JAK/STAT). AT1R-mediated NADPH oxidase activation also leads to the generation of reactive oxygen species, widely implicated in neuroinflammation. These signaling cascades lead to glutamate excitotoxicity, apoptosis, cerebral infarction, astrocyte proliferation, nociception, neuroinflammation, and progression of other neurological disorders. The present review focuses on the Ang II-triggered signal transduction pathways in central nervous system.
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Hiremathad A, Piemontese L. Heterocyclic compounds as key structures for the interaction with old and new targets in Alzheimer's disease therapy. Neural Regen Res 2017; 12:1256-1261. [PMID: 28966636 PMCID: PMC5607816 DOI: 10.4103/1673-5374.213541] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2017] [Indexed: 12/18/2022] Open
Abstract
Nowadays, Alzheimer's disease (AD) is widely recognized as a real social problem. In fact, only five drugs are FDA approved for the therapy of this widespread neurodegenerative disease, but with low results so far. Three of them (rivastigmine, donepezil and galantamine) are acetylcholinesterase inhibitors, memantine is a N-methyl-D-aspartate receptor antagonist, whereas the fifth formulation is a combination of donepezil with memantine. The prevention and treatment of AD is the new challenge for pharmaceutical industry, as well as for public institutions, physicians, patients, and their families. The discovery of a new and safe way to cure this neurodegenerative disease is urgent and should not be delayed further. Because of the multiple origin of this pathology, a multi-target strategy is currently strongly pursued by researchers. In this review, we have discussed new structures designed to better the activity on the classical AD targets. We have also examined old and new potential drugs that could prove useful future for the therapy of the pathology by acting on innovative, not usual, and not yet fully explored targets like peroxisome proliferator-activated receptor (PPARs).
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Affiliation(s)
- Asha Hiremathad
- Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Ramanagaram, Bangalore, India
| | - Luca Piemontese
- Dipartimento di Farmacia–Scienze del Farmaco, Università degli Studi di Bari “Aldo Moro”, Bari, Italy
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Intranasal telmisartan ameliorates brain pathology in five familial Alzheimer's disease mice. Brain Behav Immun 2017; 64:80-90. [PMID: 28385651 DOI: 10.1016/j.bbi.2017.04.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/09/2017] [Accepted: 04/01/2017] [Indexed: 11/23/2022] Open
Abstract
The renin-angiotensin system (RAS) is a major circulative system engaged in homeostasis modulation. Angiotensin II (Ang II) serves as its main effector hormone upon binding to its primary receptor, Ang II receptor type 1 (AT1R). It is well established that an intrinsic independent brain RAS exists. Abnormal AT1R activation both in the periphery and in the brain probably contributes to the development of Alzheimer's disease (AD) pathology that is characterized, among others, by brain inflammation. Moreover, treatment with drugs that block AT1R (AT1R blockers, ARBs) ameliorates most of the clinical risk factors leading to AD. Previously we showed that short period of intranasal treatment with telmisartan (a brain penetrating ARB) reduced brain inflammation and ameliorated amyloid burden (a component of Alzheimer's plaques) in AD transgenic mouse model. In the present study, we aimed to examine the long-term effect of intranasally administrated telmisartan on brain inflammation features including microglial activation, astrogliosis, neuronal loss and hippocampus-dependent cognition in five-familial AD mouse model (5XFAD). Five month of intranasal treatment with telmisartan significantly reduced amyloid burden in the cortex and hippocampus of 5XFAD mice as compared with the vehicle-treated 5XFAD group. Similar effects were also observed for CD11b staining, which is a marker for microglial accumulation. Telmisartan also significantly reduced astrogliosis and neuronal loss in the cortex of 5XFAD mice compared with the vehicle-treated group. Improved spatial acquisition of the 5XFAD mice following long-term intranasal administration of telmisartan was also observed. Taken together, our data suggest a significant role for AT1R blockage in mediating neuronal loss and cognitive behavior, possibly through regulation of amyloid burden and glial inflammation.
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Song KH, Bae SJ, Chang J, Park JH, Jo I, Cho KW, Cho DH. Telmisartan mitigates hyperglycemia-induced vascular inflammation by increasing GSK3β-Ser 9 phosphorylation in endothelial cells and mouse aortas. Biochem Biophys Res Commun 2017; 491:903-911. [PMID: 28754590 DOI: 10.1016/j.bbrc.2017.07.134] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 07/24/2017] [Indexed: 01/08/2023]
Abstract
Telmisartan, an angiotensin II type 1 receptor blocker (ARB), attenuates hyperglycemia-aggravated vascular inflammation by decreasing IκB kinase β (IKKβ) expression in endothelial cells. Because glycogen synthase 3β (GSK3β) is involved in inflammatory process by regulating nuclear factor-κB (NF-κB) activity, we investigated whether GSK3β mediates telmisartan-ameliorated vascular inflammation in hyperglycemia-treated endothelial cells and high-fat diet (HFD)-fed mice. Telmisartan remarkably induced GSK3β-Ser9 phosphorylation in hyperglycemia-treated endothelial cells that accompanied a decrease in hyperglycemia-induced NF-κB p65-Ser536 phosphorylation, vascular cell adhesion molecule-1 (VCAM-1) expression, and THP-1 monocyte adhesion. Ectopic expression of GSK3β-S9A, a constitutively active mutant of GSK3β, significantly restored complete telmisartan-inhibited NF-κB p65-Ser536 phosphorylation, VCAM-1 expression, and THP-1 monocyte adhesion. In addition, it reversed telmisartan-repressed IKKβ expression. Among the ARB, including losartan and fimasartan, only telmisartan increased GSK3β-Ser9 phosphorylation, and telmisartan-induced GSK3β-Ser9 phosphorylation remained unchanged by pretreatment with GW9662, a specific and irreversible peroxisome proliferator-activated receptor γ (PPARγ) antagonist. Finally, in the aortas of HFD-fed mice, telmisartan treatment significantly attenuated HFD-induced upregulation of NF-κB p65-Ser536 phosphorylation, VCAM-1 expression, and IKKβ expression and downregulation of GSK3β-Ser9 phosphorylation. Taken together, our findings demonstrated that telmisartan ameliorates hyperglycemia-exacerbated vascular inflammation, at least in part, by inducing GSK3β-Ser9 phosphorylation, which consequently inhibits IKKβ expression, NF-κB p65-Ser536 phosphorylation, and VCAM-1 expression in a PPARγ-independent manner.
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Affiliation(s)
- Kee-Ho Song
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Konkuk University School of Medicine, 120-1, Neungdong-ro, Hwayang-dong, Gwangjin-gu, Seoul 05030, South Korea
| | - Sun-Ju Bae
- Department of Pharmacology, School of Medicine, Eulji University, 77 Gyeryong-ro, 771 Beon-gil, Jung-gu, Daejeon 34824, South Korea
| | - Jiyeon Chang
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, 25 Bongjung-ro, Cheonan, Chungcheongnam do 31151, South Korea
| | - Jung-Hyun Park
- Department of Molecular Medicine, Ewha Womans University Medical School, 1071, Anyangcheon-ro, Yangcheon-gu, Seoul 07985, South Korea
| | - Inho Jo
- Department of Molecular Medicine, Ewha Womans University Medical School, 1071, Anyangcheon-ro, Yangcheon-gu, Seoul 07985, South Korea
| | - Kae Won Cho
- Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, 25 Bongjung-ro, Cheonan, Chungcheongnam do 31151, South Korea.
| | - Du-Hyong Cho
- Department of Pharmacology, School of Medicine, Eulji University, 77 Gyeryong-ro, 771 Beon-gil, Jung-gu, Daejeon 34824, South Korea.
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The natural product 4,10-aromadendranediol induces neuritogenesis in neuronal cells in vitro through activation of the ERK pathway. Acta Pharmacol Sin 2017; 38:29-40. [PMID: 27840407 DOI: 10.1038/aps.2016.115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 09/20/2016] [Indexed: 12/15/2022] Open
Abstract
Recent studies focus on promoting neurite outgrowth to remodel the central nervous network after brain injury. Currently, however, there are few drugs treating brain diseases in the clinic by enhancing neurite outgrowth. In this study, we established an NGF-induced PC12 differentiation model to screen novel compounds that have the potential to induce neuronal differentiation, and further characterized 4,10-Aromadendranediol (ARDD) isolated from the dried twigs of the Baccharis gaudichaudiana plant, which exhibited the capability of promoting neurite outgrowth in neuronal cells in vitro. ARDD (1, 10 μmol/L) significantly enhanced neurite outgrowth in NGF-treated PC12 cells and N1E115 cells in a time-dependent manner. In cultured primary cortical neurons, ARDD (5, 10 μmol/L) not only significantly increased neurite outgrowth but also increased the number of neurites on the soma and the number of bifurcations. Further analyses showed that ARDD (10 μmol/L) significantly increased the phosphorylation of ERK1/2 and the downstream GSK-3β, subsequently induced β-catenin expression and up-regulated the gene expression of the Wnt ligands Fzd1 and Wnt3a in neuronal cells. The neurite outgrowth-promoting effect of ARDD in neuronal cells was abolished by pretreatment with the specific ERK1/2 inhibitor PD98059, but was partially reversed by XAV939, an inhibitor of the Wnt/β-catenin pathway. ARDD also increased the expression of BDNF, CREB and GAP-43 in N1E115 cells, which was reversed by pretreatment with PD98059. In N1E115 cells subjected to oxygen and glucose deprivation (OGD), pretreatment with ARDD (1-10 μmol/L) significantly enhanced the phosphorylation of ERK1/2 and induced neurite outgrowth. These results demonstrated that the natural product ARDD exhibits neurite outgrowth-inducing activity in neurons via activation of the ERK signaling pathway, which may be beneficial to the treatment of brain diseases.
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Wang D, Mitchell ES. Cognition and Synaptic-Plasticity Related Changes in Aged Rats Supplemented with 8- and 10-Carbon Medium Chain Triglycerides. PLoS One 2016; 11:e0160159. [PMID: 27517611 PMCID: PMC4982641 DOI: 10.1371/journal.pone.0160159] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 07/14/2016] [Indexed: 12/25/2022] Open
Abstract
Brain glucose hypometabolism is a common feature of Alzheimer’s disease (AD). Previous studies have shown that cognition is improved by providing AD patients with an alternate energy source: ketones derived from either ketogenic diet or supplementation with medium chain triglycerides (MCT). Recently, data on the neuroprotective capacity of MCT-derived medium chain fatty acids (MCFA) suggest 8-carbon and 10-carbon MCFA may have cognition-enhancing properties which are not related to ketone production. We investigated the effect of 8 week treatment with MCT8, MCT10 or sunflower oil supplementation (5% by weight of chow diet) in 21 month old Wistar rats. Both MCT diets increased ketones plasma similarly compared to control diet, but MCT diets did not increase ketones in the brain. Treatment with MCT10, but not MCT8, significantly improved novel object recognition memory compared to control diet, while social recognition increased in both MCT groups. MCT8 and MCT10 diets decreased weight compared to control diet, where MCFA plasma levels were higher in MCT10 groups than in MCT8 groups. Both MCT diets increased IRS-1 (612) phosphorylation and decreased S6K phosphorylation (240/244) but only MCT10 increased Akt phosphorylation (473). MCT8 supplementation increased synaptophysin, but not PSD-95, in contrast MCT10 had no effect on either synaptic marker. Expression of Ube3a, which controls synaptic stability, was increased by both MCT diets. Cortex transcription via qPCR showed that immediate early genes related to synaptic plasticity (arc, plk3, junb, egr2, nr4a1) were downregulated by both MCT diets while MCT8 additionally down-regulated fosb and egr1 but upregulated grin1 and gba2. These results demonstrate that treatment of 8- and 10-carbon length MCTs in aged rats have slight differential effects on synaptic stability, protein synthesis and behavior that may be independent of brain ketone levels.
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Affiliation(s)
- Dongmei Wang
- Nestle Institute of Health Sciences, Cognitive Health and Aging, EPFL Innovation Park, Building H, 1015, Lausanne, Switzerland
| | - Ellen S. Mitchell
- Nestle Institute of Health Sciences, Cognitive Health and Aging, EPFL Innovation Park, Building H, 1015, Lausanne, Switzerland
- * E-mail:
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Liu L, Lin Y, Liu L, Wang L, Bian Y, Gao X, Li Q. Regulation of peroxisome proliferator-activated receptor gamma on milk fat synthesis in dairy cow mammary epithelial cells. In Vitro Cell Dev Biol Anim 2016; 52:1044-1059. [DOI: 10.1007/s11626-016-0059-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 05/18/2016] [Indexed: 12/26/2022]
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26
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Pang T, Wang YJ, Gao YX, Xu Y, Li Q, Zhou YB, Xu L, Huang ZJ, Liao H, Zhang LY, Gao JR, Ye Q, Li J. A novel GSK-3β inhibitor YQ138 prevents neuronal injury induced by glutamate and brain ischemia through activation of the Nrf2 signaling pathway. Acta Pharmacol Sin 2016; 37:741-52. [PMID: 27108601 DOI: 10.1038/aps.2016.3] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 01/19/2016] [Indexed: 12/17/2022] Open
Abstract
AIM To discover neuroprotective compounds and to characterize the discovered active compound YQ138 as a novel GSK-3β inhibitor. METHODS Primary rat cerebellar granule cells (CGCs) were treated with glutamate, and cell viability was analyzed with MTT assay, which was used as in vitro model for screening neuroprotective compounds. Active compound was further tested in OGD- or serum deprivation-induced neuronal injury models. The expression levels of GSK-3β downstream proteins (Nrf2, HO-1, NQO1, Tau and β-catenin) were detected with Western blotting. For evaluating the neuroprotective effects in vivo, adult male rats were subjected to transient middle cerebral artery occlusion (tMCAO), then treated with YQ138 (10 mg/kg, iv) at 2, 4 and 6 h after ischemia onset. RESULTS From a compound library consisting of about 2000 potential kinase inhibitors, YQ138 was found to exert neuroprotective effects: pretreatment with YQ138 (0.1-40 μmol/L) dose-dependently inhibited glutamate-induced neuronal death. Furthermore, pretreatment with YQ138 (10 μmol/L) significantly inhibited OGD- or serum deprivation-induced neuronal death. Among a panel of seven kinases tested, YQ138 selectively inhibited the activity of GSK-3β (IC50=0.52 nmol/L). Furthermore, YQ138 dose-dependently increased the expression of β-catenin, and decreased the phosphorylation of Tau in CGCs. Moreover, YQ138 significantly increased the expression of GSK-3β downstream antioxidative proteins Nrf2, HO-1, NQO1, GSH and SOD in CGCs. In rats with tMCAO, administration of YQ138 significantly decreased infarct volume, improved the neurological deficit, and increased the expression of Nrf2 and HO-1 and the activities of SOD and GSH in the cerebral cortex. CONCLUSION A novel GSK-3β inhibitor YQ138 effectively suppresses brain ischemic injury in vitro and in vivo.
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27
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Evidence to Consider Angiotensin II Receptor Blockers for the Treatment of Early Alzheimer’s Disease. Cell Mol Neurobiol 2016; 36:259-79. [DOI: 10.1007/s10571-015-0327-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 12/31/2015] [Indexed: 12/12/2022]
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Song KH, Park JH, Jo I, Park JY, Seo J, Kim SA, Cho DH. Telmisartan attenuates hyperglycemia-exacerbated VCAM-1 expression and monocytes adhesion in TNFα-stimulated endothelial cells by inhibiting IKKβ expression. Vascul Pharmacol 2016; 78:43-52. [DOI: 10.1016/j.vph.2015.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/08/2015] [Accepted: 10/04/2015] [Indexed: 01/06/2023]
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Pu Z, Zhu M, Kong F. Telmisartan prevents proliferation and promotes apoptosis of human ovarian cancer cells through upregulating PPARγ and downregulating MMP‑9 expression. Mol Med Rep 2015; 13:555-9. [PMID: 26548340 DOI: 10.3892/mmr.2015.4512] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 09/25/2015] [Indexed: 11/06/2022] Open
Abstract
The mortality rate of ovarian cancer is the highest of all gynecological malignancies. Telmisartan is a commonly used clinical angiotensin receptor blocker, which has antihypertensive, anti‑inflammatory and antithrombotic effects. In the present study, it was investigated whether telmisartan could exert anticancer effects on ovarian cancer cells through upregulating peroxisome proliferator‑activated receptor γ (PPARγ) and downregulating matrix metalloproteinase‑9 (MMP‑9) expression. A 3.3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was conducted to analyze the proliferation of HEY cells. A Caspase‑3 Activity Assay kit and an Annexin V‑fluorescein isothiocyanate/propidium iodide kit were used to analyze the apoptosis of HEY cells. In addition, a gelatin zymography assay and reverse trancription‑quantitative polymerase chain reaction were included to analyze the expression of PPARγ and MMP‑9 in HEY cells. The data showed that telmisartan could significantly decrease cell viability and induce the apoptosis of HEY cells in a time‑ and dose‑dependent manner. Furthermore, telmisartan could also dose‑dependently increase the expression of PPARγ and decrease the expression of MMP‑9 in HEY cells. In addition, downregulation of the expression of PPARγ by small interfering (si)RNA could reduce the effect of telmisartan on ovarian cancer cells and increase the expression of MMP‑9. In conclusion, the results indicated that telmisartan prevents proliferation and promotes apoptosis of human ovarian cancer cells by upregulating PPARγ and downregulating MMP‑9 expression.
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Affiliation(s)
- Zhichen Pu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Min Zhu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Fandou Kong
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
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30
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Gao Y, Xu X, Chang S, Wang Y, Xu Y, Ran S, Huang Z, Li P, Li J, Zhang L, Saavedra JM, Liao H, Pang T. Totarol prevents neuronal injury in vitro and ameliorates brain ischemic stroke: Potential roles of Akt activation and HO-1 induction. Toxicol Appl Pharmacol 2015; 289:142-54. [PMID: 26440581 DOI: 10.1016/j.taap.2015.10.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/22/2015] [Accepted: 10/02/2015] [Indexed: 11/24/2022]
Abstract
The natural product totarol, a phenolic diterpenoid and a major constituent isolated from the sap of Podocarpus totara, has been reported to have a potent antimicrobial activity. In this study, we determined whether totarol possessed an additional neuroprotective activity in vitro and in vivo. We found that totarol prevented glutamate- and oxygen and glucose deprivation-induced neuronal death in primary rat cerebellar granule neuronal cells and cerebral cortical neurons. Totarol increased Akt and GSK-3β phosphorylation, Nrf2 and heme oxygenase-1 (HO-1) protein expressions and suppressed oxidative stress by increasing GSH and SOD activities. The PI3K/Akt inhibitor LY294002 prevented totarol neuroprotective effect by suppressing the totarol-induced changes in HO-1 expression and the activities of GSH and SOD. The HO-1 inhibitor ZnPPIX also prevented totarol-increased GSH and SOD activities. In a model of acute cerebral ischemic injury in Sprague-Dawley rats, produced by occlusion of the middle cerebral artery for 2h followed by 22 h or 46 h of reperfusion, totarol significantly reduced infarct volume and improved the neurological deficit. In this model, totarol increased HO-1 expression and the activities of GSH and SOD. These observations suggest that totarol may be a novel activator of the Akt/HO-1 pathway protecting against ischemic stroke through reduction of oxidative stress.
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Affiliation(s)
- Yuanxue Gao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Xiaojun Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Sai Chang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yunjie Wang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yazhou Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Siqi Ran
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Zhangjian Huang
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing 210009, PR China
| | - Ping Li
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Jia Li
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 189 Guo Shoujing Road, Shanghai 201203, PR China
| | - Luyong Zhang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Juan M Saavedra
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Hong Liao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Tao Pang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China; Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20057, USA.
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Wang YY, Gao YX, Gao W, Xu Y, Xu YZ, Wang YJ, Chang S, Yu LG, Zhang LY, Liao H, Yang LF, Pang T, Qiu WW. Design, synthesis and biological evaluation of tricyclic diterpene derivatives as novel neuroprotective agents against ischemic brain injury. Eur J Med Chem 2015; 103:396-408. [PMID: 26375352 DOI: 10.1016/j.ejmech.2015.08.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/27/2015] [Accepted: 08/28/2015] [Indexed: 01/28/2023]
Abstract
Lead compound 7 has neuroprotective effects, and it was discovered by screening a small synthetic natural product-like (NPL) library. Based on the lead, a series of tricyclic diterpene derivatives was designed and synthesized, and their neuroprotective effects were further evaluated against glutamate-, oxygen and glucose deprivation (OGD)- and nutrient deprivation-induced neuronal injury using cell-based assays. To our delight, most of these synthetic compounds exhibited increased neuroprotective effects and blood-brain barrier (BBB) permeability without cellular toxicity. The most potent compound, compound 30, showed significantly improved neuroprotection against neuronal injury in primary neurons. Furthermore, compound 30 exhibited remarkable neuroprotection in transient middle cerebral artery occlusion (tMCAO) rats by reducing their infarct sizes and neurological deficit scores. A mechanistic exploration using in vitro and in vivo experiments showed that the neuroprotection of these compounds was at least partly mediated by improving the levels of glutathione (GSH), superoxide dismutase (SOD) and heme oxygenase-1 (HO-1) protein. Therefore, these tricyclic diterpene derivatives could be used as promising leads for the development of a new type of neuroprotective agents against ischemic brain injury.
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Affiliation(s)
- Ying-Ying Wang
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yuan-Xue Gao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Wei Gao
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yuan Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Ya-Zhou Xu
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Yun-Jie Wang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Sai Chang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Li-Gang Yu
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Lu-Yong Zhang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Hong Liao
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Lian-Fang Yang
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Tao Pang
- Jiangsu Key Laboratory of Drug Screening, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China.
| | - Wen-Wei Qiu
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
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Pioglitazone Ameliorates Neuron Loss in the Cortex after Aluminum-Treatment in Rats. Neurol Res Int 2015; 2015:381934. [PMID: 26167300 PMCID: PMC4475701 DOI: 10.1155/2015/381934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 05/21/2015] [Accepted: 05/24/2015] [Indexed: 11/18/2022] Open
Abstract
The objective was evaluation of the effects of pioglitazone on medial prefrontal cortex (mPFC) of the rats exposed to aluminum (Al). Al induces structural changes in several brain regions, including mPFC. Pioglitazone is an agonist of peroxisomal proliferator activated receptor gamma. Male rats were randomly assigned to control, Al-treated (10 mg/kg/day), and Al + PIO-treated groups (Al+ 40 mg/kg/day). After 56 days, the right mPFCs were removed. Then, the volume of mPFC and its subdivisions, volume of vessels, and total number of neurons and glia were estimated using stereological methods. The results showed 13–38% decrease in the volume of the mPFC and its subdivisions, mainly in the infralimbic region (P < 0.02). Besides, the volume of the vessels reduced by 47% after Al-treatment (P < 0.02). The total number of the neurons and glial cells was also reduced (40% and 25%, resp.) in the Al-exposed rats in comparison to the control ones (P < 0.02). Treatment of the animals with Al + PIO ameliorated the neuron loss and no improvement was seen in other parameters (P < 0.02). It can be concluded that treatment of the rats with PIO could ameliorate the neuron loss in the mPFC of the Al-treated animals.
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