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1.
Cardiol Cardiovasc Med ; 7(1): 32-38, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36969491

RESUMO

Ischemic stroke (IS) is a common neurological disease in the elderly, but the relationship between neutrophil/albumin ratio (NAR) and leukocyte count/albumin ratio (LAR) and the severity of neurological function injury and early neurological deterioration (END) occurrence remain elusive in acute IS. A total of 299 patients with acute IS and 56 healthy controls were enrolled. According to the NIHSS score at admission, the disease group was divided into three groups (mild, moderate and severe IS), and the differences in five indexes NAR, LAR, neutrophil count, leukocyte count and albumin among the four groups were analyzed. Furthermore, explore the correlation between the above indicators and the severity of IS and END occurrence. The results showed that higher NAR, LAR, neutrophil count, leukocyte count levels and lower albumin levels were associated with acute IS, and the levels of NAR and LAR increased gradually in three groups of IS. NAR and LAR were positively and albumin was negatively correlated with the severity of IS. Meanwhile, NAR and LAR showed a good predictive value in identifying patients with END after acute IS. NAR and LAR may be predictors of the severity of IS and END occurrence after acute IS.

2.
Neuroscience ; 466: 47-57, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33974963

RESUMO

The degradation of damaged proteins takes place via two major proteolytic pathways: the ubiquitin-proteasome system (UPS) and autophagy. However, since it is unclear how these two proteolytic pathways contribute to the pathogenesis of amyotrophic lateral sclerosis (ALS), we investigated the switching mechanism from UPS to autophagy by pharmacologically modifying these pathways by treating the spinal cords of female ALS mouse model bearing G93A human SOD1 (G93A mice) with MG132 or 3-methyladenine (3MA). G93A mice exhibited a progressive increase in the amount of ubiquitin and p62 aggregates, BAG3 expression, and LC3-II/LC3-I ratio in both astroglia and motor neurons. Treatment with MG132 or 3MA significantly increased the clinical hanging wire score and exacerbated α-motor neuron loss at 18 weeks in G93A mice, and increased the amount of ubiquitin, p62 aggregates, and BAG3 expression. This study's results demonstrate that the molecular switch from UPS to autophagy occurred not only in motor neurons but also in astroglia at the end stage (18 weeks) when the autophagic flux was impaired in G93A mice. This finding suggests that the defense system was disrupted against aggregate-prone protein production in ALS.


Assuntos
Esclerose Lateral Amiotrófica , Proteínas Adaptadoras de Transdução de Sinal , Animais , Proteínas Reguladoras de Apoptose , Autofagia , Modelos Animais de Doenças , Feminino , Humanos , Camundongos , Camundongos Transgênicos , Complexo de Endopeptidases do Proteassoma , Medula Espinal/metabolismo , Superóxido Dismutase/metabolismo , Superóxido Dismutase-1 , Ubiquitina/metabolismo
3.
Open Med (Wars) ; 15(1): 954-961, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33336053

RESUMO

BACKGROUND: Bone marrow stromal cells (BMSCs) have an important application prospect in the field of cell therapy for various neurodegenerative diseases, and inducing factors that regulate BMSC differentiation are proposed as a promising therapeutic strategy. In this study, we explored the effect of glial cell-derived neurotrophic factor (GDNF) on the course of BMSC differentiation. METHODS: BMSCs were isolated from rat bone marrow and induced by GDNF. The effects of GDNF on BMSC viability and proliferation were verified by cell counting kit-8, MTT, bromodeoxyuridine, and flow cytometry assays. Neuronal differentiation from BMSCs was detected by quantitative real-time polymerase chain reaction and immunofluorescence via measuring the expression of several neural specific markers. RESULTS: Compared to untreated BMSCs, GDNF induced the differentiation of BMSCs into neuron-like cells and enhanced the expression levels of neuronal markers including nestin and NCAM. Moreover, the expression of SCF was suppressed by GDNF stimulation. CONCLUSION: GDNF could elevate the differentiation of BMSCs into neuron-like cells and could be considered as an effective candidate cell for future neuroscience research.

4.
J Stroke Cerebrovasc Dis ; 29(8): 104818, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32439352

RESUMO

BACKGROUND: During an acute stroke, reactive oxygen species are overproduced and the endogenous antioxidative defense systems are disrupted. Therefore, antioxidative therapy can be a promising scheme to reduce the severity of stroke. Neumentix is a novel antioxidative supplement produced from a patented mint line and contains a high content of rosmarinic acid (RA). Although Neumentix has proven diverse efficacy and safety in clinical trials, its effect on strokes is unclear. METHODS: Mice that were treated with Neumentix or vehicle for 14 days underwent transient middle cerebral artery occlusion (tMCAO) for 60 min. Mice were sacrificed 5 days after tMCAO. RESULTS: Neumentix preserved body weight after tMCAO, showed a high antioxidative effect in serum, and reduced infarction volume compared to the vehicle. The expression of 4-hydroxy-2-nonenal, Nε-(carboxymethyl) lysine, and 8-hydroxy-2'-deoxyguanosine was reduced in Neumentix-treated mice. CONCLUSION: The antioxidative effect of Neumentix was confirmed. This is the first report to demonstrate the antioxidative effect of Neumentix on strokes.


Assuntos
Antioxidantes/farmacologia , Encéfalo/efeitos dos fármacos , Cinamatos/farmacologia , Depsídeos/farmacologia , Suplementos Nutricionais , Infarto da Artéria Cerebral Média/tratamento farmacológico , Fármacos Neuroprotetores/farmacologia , Estresse Oxidativo/efeitos dos fármacos , Espécies Reativas de Oxigênio/metabolismo , 8-Hidroxi-2'-Desoxiguanosina/metabolismo , Aldeídos/metabolismo , Animais , Encéfalo/metabolismo , Encéfalo/patologia , Modelos Animais de Doenças , Infarto da Artéria Cerebral Média/metabolismo , Infarto da Artéria Cerebral Média/patologia , Lisina/análogos & derivados , Lisina/metabolismo , Masculino , Camundongos Endogâmicos C57BL , Ácido Rosmarínico
5.
Curr Neurovasc Res ; 17(3): 286-293, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32416676

RESUMO

BACKGROUND: Cerebral ischemia causes a strong inflammatory response. Neumentix is a dietary supplement containing 14.9% rosmarinic acid and 29.9% total phenolic content, which has been proved to be beneficial against inflammatory response. Therefore, Neumentix's effect on anti-inflammatory and blood brain barrier (BBB) disruption in transient middle cerebral artery occlusion (tMCAO) model mice is investigated in this study. METHODS: After the pretreatment of vehicle or Neumentix 134 mg/kg/d, intraperitoneal injection (i.p.) (containing rosmarinic acid 20 mg/kg/d) for 14 days, mice were subjected to tMCAO for 60 min and kept receiving vehicle or Neumentix daily 5 days afterward. RESULTS: Neumentix treatment ameliorated neurobehavioral impairment in the corner test (5d after tMCAO, **P<0.01), reduced infarct volume (#P<0.05), suppressed expression of ionized calciumbinding adapter molecule-1 (Iba-1), tumor necrosis factor alpha (TNF-α) and monocyte chemoattractant protein-1 (MCP-1) (###P<0.001), and improved the integrity of BBB (§P<0.05) at 5 days after tMCAO. CONCLUSION: The present study provided an evidence of Neumentix's anti-inflammatory and neuroprotection effect against BBB disruption on experimental tMCAO model mice, suggesting that Neumentix could be a potential therapeutic agent for stroke.


Assuntos
Anti-Inflamatórios/administração & dosagem , Barreira Hematoencefálica/efeitos dos fármacos , Barreira Hematoencefálica/metabolismo , Cinamatos/administração & dosagem , Depsídeos/administração & dosagem , Fármacos Neuroprotetores/administração & dosagem , Polifenóis/administração & dosagem , Animais , Barreira Hematoencefálica/patologia , Suplementos Nutricionais , Infarto da Artéria Cerebral Média/tratamento farmacológico , Infarto da Artéria Cerebral Média/metabolismo , Infarto da Artéria Cerebral Média/patologia , Mediadores da Inflamação/antagonistas & inibidores , Mediadores da Inflamação/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Ácido Rosmarínico
6.
Brain Res ; 1739: 146831, 2020 07 15.
Artigo em Inglês | MEDLINE | ID: mdl-32278723

RESUMO

There is thought to be a strong relationship between sphingosine-1-phosphate (S1P) signaling and pathophysiolosy of cerebral ischemia. We examined the change of expression and distribution of S1P receptors (S1PRs) and sphingosine kinases (SphKs) after cerebral ischemia in male C57BL6/J mice using immunohistochemical analysis at 1, 5, 14, and 28 days after 30 min of transient middle cerebral artery occlusion (tMCAO). S1PR1, 3, and 5 were transiently induced in the cells, which were morphologically similar to neurons in the peri-infarct lesion with a peak seen at 1 day after tMCAO (p < 0.01 vs. sham control). S1PR2 appeared in the inner layer of vessels in the ischemic core (p < 0.01 vs. sham control) and the peri-infarct lesion (p < 0.01 vs. sham control) at the acute phase after tMCAO. However, SphK1 was strongly induced at 1 and 5 days after tMCAO (p < 0.01 vs. sham control) in the peri-infarct lesion, whereas SphK2 expression did not change. Western blot analysis at 1 and 5 days after 30 min of tMCAO revealed that the expression of S1PRs were transiently enhanced at the acute phase, which was consistent with the immunohistochemical results. Double immunofluorescent analysis revealed S1PR2/NG2- and S1PR2/CD31-, S1PR3/CD31-, and S1PR5/CD31-double positive cells in the peri-infarct lesion 1 day after tMCAO. The present results suggest that S1PRs and SphK1 may be important therapeutic targets for rescuing the peri-infarct lesion.


Assuntos
Infarto da Artéria Cerebral Média/metabolismo , Fosfotransferases (Aceptor do Grupo Álcool)/metabolismo , Receptores de Esfingosina-1-Fosfato/metabolismo , Animais , Isquemia Encefálica/metabolismo , Isquemia Encefálica/fisiopatologia , Modelos Animais de Doenças , Infarto da Artéria Cerebral Média/fisiopatologia , Lisofosfolipídeos/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Neurônios/metabolismo , Fosfotransferases (Aceptor do Grupo Álcool)/fisiologia , Receptores de Lisoesfingolipídeo/metabolismo , Transdução de Sinais , Esfingosina/análogos & derivados , Esfingosina/metabolismo , Receptores de Esfingosina-1-Fosfato/fisiologia , Ativação Transcricional
7.
J Stroke Cerebrovasc Dis ; 29(5): 104743, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32127256

RESUMO

BACKGROUND: Bone marrow stromal cell (BMSC) transplantation is a promising therapeutic approach for cerebral ischemia, as it elicits multiple neuroprotective effects. However, it remains unclear how BMSC transplantation modulates the ubiquitin-proteasome system (UPS) and autophagy under cerebral ischemia. METHODS: In the present study, an intermediate level of cerebral ischemia (30 minutes) was chosen to examine the effect of BMSC transplantation on the molecular switch regulating UPS and autophagy. BMSC or vehicle was stereotactically injected into the penumbra 15 minutes after sham operation or transient middle cerebral artery occlusion (tMCAO). RESULTS: Thirty minutes of tMCAO artery occlusion significantly increased TUNEL-, ubiquitin-, and p62-positive cells (which peaked at 72 hours, 2 hours, and 2 hours after reperfusion, respectively) and ratios of both BAG3/BAG1 and LC3-II/LC3-I at 24 hours after reperfusion. However, intracerebral injection of BMSCs significantly reduced infarct volume and numbers of TUNEL- and p62-positive cells, and improved BAG3/BAG1 and LC3-II/LC3-I ratios. In addition, observed increases in ubiquitin-positive cells 2 hours after reperfusion were slightly suppressed by BMSC transplantation. CONCLUSIONS: These data suggest a protective role of BMSC transplantation, which drove the molecular switch from autophagy to UPS in a murine model of ischemic stroke.


Assuntos
Autofagia , Encéfalo/enzimologia , Infarto da Artéria Cerebral Média/cirurgia , Transplante de Células-Tronco Mesenquimais , Complexo de Endopeptidases do Proteassoma/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Animais , Apoptose , Proteínas Reguladoras de Apoptose/metabolismo , Encéfalo/patologia , Células Cultivadas , Proteínas de Ligação a DNA/metabolismo , Modelos Animais de Doenças , Infarto da Artéria Cerebral Média/enzimologia , Infarto da Artéria Cerebral Média/patologia , Masculino , Camundongos Endogâmicos C57BL , Proteínas Associadas aos Microtúbulos/metabolismo , Proteína Sequestossoma-1/metabolismo , Transdução de Sinais , Fatores de Tempo , Fatores de Transcrição/metabolismo , Ubiquitinação
8.
J Cereb Blood Flow Metab ; 40(1): 214-224, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-30375939

RESUMO

The ubiquitin-proteasome system (UPS) and autophagy are two major pathways to degrade misfolded proteins that accumulate under pathological conditions. When UPS is overloaded, the degeneration pathway may switch to autophagy to remove excessive misfolded proteins. However, it is still unclear whether and how this switch occurs during cerebral ischemia. In the present study, transient middle cerebral artery occlusion (tMCAO) resulted in accelerated ubiquitin-positive protein aggregation from 0.5 h of reperfusion in mice brain after 10, 30 or 60 min of tMCAO. In contrast, significant reduction of p62 and induction of LC3-II were observed, peaking at 24 h of reperfusion after 30 and 60 min tMCAO. Western blot analyses showed an increase of BAG3 and HDAC6 at 1 or 24 h of reperfusion that was dependent on the ischemic period. In contract, BAG1 decreased at 24 h of reperfusion after 10, 30 or 60 min of tMCAO after double immunofluorescent colocalization of ubiquitin, HSP70, p62 and BAG3. These data suggest that a switch from UPS to autophagy occurred between 10 and 30 min of cerebral ischemia depending on the BAG1/BAG3 ratio and level of HDAC6.


Assuntos
Autofagia , Redes e Vias Metabólicas , Complexo de Endopeptidases do Proteassoma/metabolismo , Acidente Vascular Cerebral/metabolismo , Ubiquitina/metabolismo , Animais , Proteínas de Ligação a DNA/análise , Modelos Animais de Doenças , Desacetilase 6 de Histona/análise , Infarto da Artéria Cerebral Média , Camundongos , Chaperonas Moleculares/análise , Proteínas Nucleares/análise , Reperfusão , Fatores de Tempo , Fatores de Transcrição/análise
9.
Health Care Manag Sci ; 23(3): 427-442, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31338637

RESUMO

With the rapid development of modern information technology, the health care industry is entering a critical stage of intelligence. Faced with the growing health care big data, information security issues are becoming more and more prominent in the management of smart health care, especially the problem of patient privacy leakage is the most serious. Therefore, strengthening the information management of intelligent health care in the era of big data is an important part of the long-term sustainable development of hospitals. This paper first identified the key indicators affecting the privacy disclosure of big data in health management, and then established the risk access control model based on the fuzzy theory, which was used for the management of big data in intelligent medical treatment, and solves the problem of inaccurate experimental results due to the lack of real data when dealing with actual problems. Finally, the model is compared with the results calculated by the fuzzy tool set in Matlab. The results verify that the model is effective in assessing the current safety risks and predicting the range of different risk factors, and the prediction accuracy can reach more than 90%.


Assuntos
Big Data , Confidencialidade , Gerenciamento de Dados/métodos , Segurança Computacional , Anonimização de Dados , Gerenciamento de Dados/normas , Lógica Fuzzy , Setor de Assistência à Saúde , Humanos , Privacidade
10.
J Alzheimers Dis ; 73(1): 209-215, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31771056

RESUMO

The world is rapidly aging and facing an increase in the number of dementia patients, so it is important to detect the preclinical stage of dementia in such countries. We examined both cognitive and affective functions among cognitively normal control (n = 218), mild cognitive impairment (MCI, n = 146), and Alzheimer's disease (AD, n = 305) subjects using two evaluation tools for behavioral and psychological symptoms of dementia (BPSD) [Abe's BPSD score (ABS) and mild behavioral impairment (MBI)]. BPSD were present in 12.4% (ABS) and 9.6% (MBI) of cognitively normal people, 34.9% and 32.2% in MCI subjects, and 66.2% and 51.1% in AD patients. Both ABS (§p<0.05) and MBI (§§p < 0.01) score showed worse score with cognitive decline of the Mini-Mental State Examination in the AD group in BPSD-positive participants. Similar correlations were found in all participants in AD group (||||p < 0.01 versus ABS and MBI). Among the subscales in BPSD-positive participants, an apathy/indifference score of ABS and a decreased motivation of MBI showed significant differences in AD patients compared to the control and MCI subjects (**p<0.01). In addition, subscale analyses further showed a downward trend from the control to MCI and AD subjects in four ABS subscales and three MBI subscales. The present study showed the preclinical presence of BPSD in cognitively normal people, more so in MCI subjects, and ABS detected BPSD more sensitively than MBI in all three groups.


Assuntos
Cognição , Disfunção Cognitiva/psicologia , Transtornos Mentais/psicologia , Idoso , Idoso de 80 Anos ou mais , Envelhecimento , Doença de Alzheimer/psicologia , Apatia , Demência/psicologia , Feminino , Humanos , Masculino , Testes de Estado Mental e Demência , Motivação , Valores de Referência
11.
J Alzheimers Dis ; 73(1): 217-227, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31771070

RESUMO

BACKGROUND: Because dementia is an emerging problem in the world, biochemical markers of cerebrospinal fluid (CSF) and radio-isotopic analyses are helpful for diagnosing Alzheimer's disease (AD). Although blood sample is more feasible and plausible than CSF or radiological biomarkers for screening potential AD, measurements of serum amyloid- ß (Aß), plasma tau, and serum antibodies for Aß1 - 42 are not yet well established. OBJECTIVE: We aimed to identify a new serum biomarker to detect mild cognitive impairment (MCI) and AD in comparison to cognitively healthy control by a new peptidome technology. METHODS: With only 1.5µl of serum, we examined a new target plate "BLOTCHIP®" plus a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS) to discriminate control (n = 100), MCI (n = 60), and AD (n = 99). In some subjects, cognitive Mini-Mental State Examination (MMSE) were compared to positron emission tomography (PET) with Pittsburgh compound B (PiB) and the serum probability of dementia (SPD). The mother proteins of candidate serum peptides were examined in autopsied AD brains. RESULTS: Apart from Aß or tau, the present study discovered a new diagnostic 4-peptides-set biomarker for discriminating control, MCI, and AD with 87% of sensitivity and 65% of specificity between control and AD (***p < 0.001). MMSE score was well correlated to brain Aß deposition and to SPD of AD. The mother proteins of the four peptides were upregulated for coagulation, complement, and plasticity (three proteins), and was downregulated for anti-inflammation (one protein) in AD brains. CONCLUSION: The present serum biomarker set provides a new, rapid, non-invasive, highly quantitative and low-cost clinical application for dementia screening, and also suggests an alternative pathomechanism of AD for neuroinflammation and neurovascular unit damage.


Assuntos
Doença de Alzheimer/sangue , Biomarcadores/sangue , Disfunção Cognitiva/sangue , Peptídeos/sangue , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/psicologia , Peptídeos beta-Amiloides/sangue , Compostos de Anilina , Disfunção Cognitiva/psicologia , Feminino , Humanos , Masculino , Testes de Estado Mental e Demência , Pessoa de Meia-Idade , Tomografia por Emissão de Pósitrons , Valor Preditivo dos Testes , Valores de Referência , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Tiazóis , Proteínas tau/sangue
13.
J Alzheimers Dis ; 71(1): 327-339, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31403949

RESUMO

Alzheimer's disease (AD) and chronic cerebral hypoperfusion (CCH) often coexist in dementia patients in aging societies. The hallmarks of AD including amyloid-ß (Aß)/phosphorylated tau (pTau) and pathology-related events such as neural oxidative stress and neuroinflammation play critical roles in pathogenesis of AD with CCH. A large number of lessons from failures of drugs targeting a single target or pathway on this so complicated disease indicate that disease-modifying therapies targeting multiple key pathways hold potent potential in therapy of the disease. In the present study, we used a novel mouse model of AD with CCH to investigate a potential therapeutic effect of a free radical scavenger, Edaravone (EDA) on AD with CCH via examining motor and cognitive capacity, AD hallmarks, neural oxidative stress, and neuroinflammation. Compared with AD with CCH mice at 12 months of age, EDA significantly improved motor and cognitive deficits, attenuated neuronal loss, reduced Aß/pTau accumulation, and alleviated neural oxidative stress and neuroinflammation. These findings suggest that EDA possesses clinical and pathological benefits for AD with CCH in the present mouse model and has a potential as a therapeutic agent for AD with CCH via targeting multiple key pathways of the disease pathogenesis.


Assuntos
Doença de Alzheimer/complicações , Doença de Alzheimer/tratamento farmacológico , Isquemia Encefálica/complicações , Edaravone/uso terapêutico , Fármacos Neuroprotetores/uso terapêutico , Animais , Modelos Animais de Doenças , Masculino , Camundongos , Camundongos Transgênicos , Teste de Desempenho do Rota-Rod
14.
Neuroscience ; 416: 126-136, 2019 09 15.
Artigo em Inglês | MEDLINE | ID: mdl-31394196

RESUMO

Alzheimer's disease (AD) in the elderly is frequently accompanied by chronic cerebral hypoperfusion (CCH), which impairs the clearance of amyloid beta (Aß) due to the dysfunction of the blood-brain barrier (BBB) and accelerates the AD pathology. Since the coagulation and complement cascades are associated with BBB dysfunction and AD pathology, we investigated the expression changes of coagulation (fibrinogen alpha chain-FGA, coagulation factor XIII A chain-Factor XIIIα) and complement (plasma protease C1 inhibitor-C1-INH, Complement component 3-C3) factors in the brain of novel AD model (APP23) mice with CCH at 12 months of age. Immunohistochemical and immunofluorescent analysis showed that the expressions of FGA, Factor XIIIα, C1-INH and C3 were significantly increased in cerebral neocortex, hippocampus, and thalamus of APP23 + CCH group (n = 12) as compared with wild type (WT, n = 10) and APP23 (n = 10) groups (⁎P < .05 and ⁎⁎P < .01 vs WT; #P < .05 and ##P < .01 vs APP23), especially near and inside of neurovascular unit. The present study suggests that CCH activated both the coagulation and complement cascades in a novel AD model mice brain accompanied by the acceleration of AD pathology.


Assuntos
Doença de Alzheimer/patologia , Precursor de Proteína beta-Amiloide/metabolismo , Isquemia Encefálica/patologia , Neurônios/metabolismo , Doença de Alzheimer/fisiopatologia , Peptídeos beta-Amiloides/metabolismo , Animais , Barreira Hematoencefálica/metabolismo , Encéfalo/metabolismo , Encéfalo/patologia , Isquemia Encefálica/fisiopatologia , Modelos Animais de Doenças , Feminino , Masculino , Camundongos Endogâmicos C57BL , Camundongos Transgênicos
15.
Brain Res ; 1723: 146379, 2019 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-31415766

RESUMO

Abnormal accumulation of amyloid-ß (Aß) peptide defines progression of Alzheimer's disease (AD) pathology in brain. Here, we investigated expressive changes of two main Aß transport receptors low-density lipoprotein receptor related protein-1 (LRP1) and receptor for advanced glycation end products (RAGE) in a novel AD mice (APP23) with chronic cerebral hypoperfusion (CCH) model, moreover, examined a protective effect of a free radical scavenger edaravone (Eda). In contrast to wild type (WT) and APP23 mice, CCH strongly accelerated abnormal Aß40 depositions and cerebral amyloid angiopathy (CAA) pathology, increased both LRP1 and RAGE expressions in brain parenchyma, while a decrease of LRP1 and an increase of RAGE were observed in vascular endothelial cells at age 12 months (M) of AD mice. Furthermore, CCH strongly increased expressions of two hypoxia-related proteins hypoxia inducible factor-1α (HIF-1α) and heme oxygenase-1 (HO-1), two oxidative-related proteins 4-hydroxy-2-nonenal (4-HNE) and 8-hydroxy-2'-deoxyguanosine (8-OHdG), and decreased both two vital nutrient transporter proteins major facilitator super family domain containing 2a (Mfsd2a) and glucose transporter 1 (Glut1) expressions. Such the above abnormal pathological changes were significantly ameliorated by edaravone treatment. The present study demonstrated that CCH strongly enhanced primary AD pathology causing double imbalances of Aß efflux and influx transport related proteins in the cortical blood vessels in AD mice, and that such a neuropathologic abnormality was greatly ameliorated by Eda.


Assuntos
Doença de Alzheimer/metabolismo , Proteína-1 Relacionada a Receptor de Lipoproteína de Baixa Densidade/metabolismo , Receptor para Produtos Finais de Glicação Avançada/metabolismo , Peptídeos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/metabolismo , Animais , Barreira Hematoencefálica/metabolismo , Encéfalo/metabolismo , Isquemia Encefálica/patologia , Circulação Cerebrovascular/efeitos dos fármacos , Circulação Cerebrovascular/fisiologia , Modelos Animais de Doenças , Edaravone/farmacologia , Células Endoteliais/metabolismo , Humanos , Proteína-1 Relacionada a Receptor de Lipoproteína de Baixa Densidade/fisiologia , Masculino , Proteínas de Membrana Transportadoras/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Fármacos Neuroprotetores/uso terapêutico , Receptor para Produtos Finais de Glicação Avançada/fisiologia , Receptores de LDL/metabolismo
16.
J Stroke Cerebrovasc Dis ; 28(10): 104310, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31383622

RESUMO

BACKGROUND: The pathological impact of chronic cerebral hypoperfusion (CCH) on Alzheimer's disease (AD) is still poorly understood. In the present study, we investigated the role of CCH on an AD mouse model in phosphorylated tau and α-synuclein pathology, neurovascular unit, cerebrovascular remodeling, and neurovascular trophic coupling. Moreover, examined protective effect of a new antioxidant Twendee X (TwX). METHODS: APP23 mice were implanted to bilateral common carotid arteries stenosis with ameroid constrictors to gradually decrease the cerebral blood flow. The effects of the administration of TwX were evaluated by immunohistochemical analysis and Immunofluorescent histochemistry. RESULTS: The present study revealed that the expressions of phospho-tau and phospho-α-synuclein were significantly increased in the APP23 + CCH mice group as compared with wild type and APP23 mice groups (*P < .05 and ⁎⁎P < .01 versus WT; #P < .05 and ##P < .01 versus APP23). In addition, CCH significantly exacerbated MMP-9 activation relating to blood-brain barrier destruction (⁎⁎P < .01 versus WT; #P < .05, and ##P < .01 versus APP23), enhanced neurovascular remodeling, and impaired a neurovascular trophic coupling in the vascular endothelial BDNF expression of the APP23 + CCH group. TwX treatment (20 mg/kg/day, from 4.5 to 12 months) significantly reduced tau and α-synuclein pathologies, ameliorated neurovascular dysfunction compared with APP23 + CCH group. CONCLUSIONS: Our findings indicate that administration of a new antioxidative mixture TwX substantially reduced the above neuropathologic abnormalities, suggesting a potential therapeutic benefit of TwX for AD with CCH.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Antioxidantes/farmacologia , Ácido Ascórbico/farmacologia , Encéfalo/efeitos dos fármacos , Transtornos Cerebrovasculares/tratamento farmacológico , Cistina/farmacologia , Glutamina/farmacologia , Acoplamento Neurovascular/efeitos dos fármacos , alfa-Sinucleína/metabolismo , Proteínas tau/metabolismo , Doença de Alzheimer/genética , Doença de Alzheimer/metabolismo , Doença de Alzheimer/fisiopatologia , Precursor de Proteína beta-Amiloide/genética , Animais , Encéfalo/metabolismo , Encéfalo/fisiopatologia , Transtornos Cerebrovasculares/genética , Transtornos Cerebrovasculares/metabolismo , Transtornos Cerebrovasculares/fisiopatologia , Suplementos Nutricionais , Modelos Animais de Doenças , Feminino , Predisposição Genética para Doença , Masculino , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Mutação , Fenótipo , Fosforilação
17.
Neuroscience ; 415: 31-43, 2019 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-31344397

RESUMO

Hypoxia inducible factor-1α (HIF-1α) is a key transcription factor that maintains oxygen homeostasis. Hypoxic stress is related to the pathogenesis of amyotrophic lateral sclerosis (ALS), and impaired HIF-1α induces motor neuron degeneration in ALS. Dimethyloxalylglycine (DMOG) upregulates the stability of HIF-1α expression and shows neuroprotective effects, but has not been used in ALS as an anti-hypoxic stress treatment. In the present study, we investigated hypoxic stress in ALS model mice bearing G93A-human Cu/Zn superoxide dismutase by in vivo HIF-1α imaging, and treated the ALS mice with DMOG. In vivo HIF-1α imaging analysis showed enhanced hypoxic stress in both the spinal cord and muscles of lower limbs of ALS mice, even at the pre-symptomatic stage. HIF-1α expression decreased as the disease progressed until 126 days of age. DMOG treatment significantly ameliorated the decrease in HIF-1α expression, the degeneration of both spinal motor neurons and myofibers in lower limbs, gliosis and apoptosis in the spinal cord. This was accompanied by prolonged survival. The present study suggests that in vivo bioluminescence resonance energy transfer (BRET) HIF-1α imaging is useful for evaluating hypoxic stress in ALS, and that the enhancement of HIF-1α is a therapeutic target for ALS patients.


Assuntos
Aminoácidos Dicarboxílicos/farmacologia , Esclerose Lateral Amiotrófica/tratamento farmacológico , Esclerose Lateral Amiotrófica/genética , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Hipóxia/metabolismo , Esclerose Lateral Amiotrófica/patologia , Animais , Apoptose , Feminino , Regulação da Expressão Gênica , Gliose , Fator 1 Induzível por Hipóxia , Estimativa de Kaplan-Meier , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Neurônios Motores/metabolismo , Neurônios Motores/patologia , Músculo Esquelético/metabolismo , Músculo Quadríceps/patologia , Medula Espinal/metabolismo , Medula Espinal/patologia , Superóxido Dismutase-1
18.
Intern Med ; 58(21): 3163-3165, 2019 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31292381

RESUMO

A complicated form of spastic paraplegia is a neurodegenerative disorder presenting as progressive spasticity in the bilateral lower limbs accompanied by some clinical features. The present case showed spastic paralysis and hyperreflexia in all extremities as well as lead pipe rigidity in the neck and bilateral upper extremities (R < L), decreased scores on frontal cognitive tests, a decreased accumulation of the right dorsal putamen on a DAT scan, and hypoperfusion of the bilateral frontal lobes on 99mTc-ECD single photon emission computed tomography (SPECT). The present case provides a new spectrum of spastic paraplegia based on the evidence of clinical scores and the findings of brain functional imaging.


Assuntos
Encéfalo/diagnóstico por imagem , Disfunção Cognitiva/complicações , Paraplegia/complicações , Tomografia Computadorizada de Emissão de Fóton Único , Idoso , Encéfalo/fisiopatologia , Disfunção Cognitiva/diagnóstico , Tratos Extrapiramidais/diagnóstico por imagem , Tratos Extrapiramidais/fisiopatologia , Lobo Frontal/fisiopatologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Testes Neuropsicológicos , Paraplegia/diagnóstico por imagem , Tomografia Computadorizada de Emissão de Fóton Único/métodos
19.
Sci Rep ; 9(1): 10956, 2019 07 29.
Artigo em Inglês | MEDLINE | ID: mdl-31358888

RESUMO

The therapeutic effect of in vivo direct reprogramming on ischemic stroke has not been evaluated. In the present study, a retroviral solution (1.5-2.0 × 107 /ul) of mock pMX-GFP (n = 13) or pMX-Ascl1/Sox2/NeuroD1 (ASN) (n = 14) was directly injected into the ipsilateral striatum and cortex 3 days after 30 min of transient cerebral ischemia. The reprogrammed cells first expressed neuronal progenitor marker Dcx 7 and 21 days after viral injection, then expressed mature neuronal marker NeuN. This was accompanied by morphological changes, including long processes and synapse-like structures, 49 days after viral injection. Meanwhile, therapeutic improvement was not detected both in clinical scores or infarct volume. The present study provides a future novel self-repair strategy for ischemic stroke with beneficial modifications of the inducer-suppressor balance.


Assuntos
Reprogramação Celular , Infarto Cerebral/terapia , Ataque Isquêmico Transitório/terapia , Neurogênese , Neurônios/citologia , Acidente Vascular Cerebral/terapia , Animais , Biomarcadores/metabolismo , Técnicas de Reprogramação Celular , Corpo Estriado/metabolismo , Corpo Estriado/patologia , Proteínas de Ligação a DNA/metabolismo , Proteína Duplacortina , Masculino , Camundongos Endogâmicos ICR , Proteínas do Tecido Nervoso/metabolismo
20.
J Stroke Cerebrovasc Dis ; 28(7): 1993-2002, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31029568

RESUMO

BACKGROUND: Multiple pathogeneses are involved in Alzheimer's disease (AD), such as amyloid-ß accumulation, neuroinflammation, and oxidative stress. The pathological impact of chronic cerebral hypoperfusion on Alzheimer's disease is still poorly understood. METHODS: APP23 mice were implanted to bilateral common carotid arteries stenosis with ameroid constrictors for slowly progressive chronic cerebral hypoperfusion (CCH). The effects of the administration of Twendee X (TwX) were evaluated by behavioral analysis, immunohistochemical analysis, and immunofluorescent histochemistry. RESULTS: In the present study, chronic cerebral hypoperfusion, which is commonly found in aged Alzheimer's disease, significantly exacerbated motor dysfunction of APP23 mice from 5 months and cognitive deficit from 8 months of age, as well as neuronal loss, extracellular amyloid-ß plaque and intracellular oligomer formations, and amyloid angiopathy at 12 months. Severe upregulations of oxidative markers and inflammatory markers were found in the cerebral cortex, hippocampus, and thalamus at 12 months. Twendee X treatment (20 mg/kg/d, from 4.5 to 12 months) substantially rescued the cognitive deficit and reduced the above amyloid-ß pathology and neuronal loss, alleviated neuroinflammation and oxidative stress. CONCLUSIONS: The present findings suggested a potential therapeutic benefit of Twendee X for Alzheimer's disease with chronic cerebral hypoperfusion.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Anti-Inflamatórios/farmacologia , Antioxidantes/farmacologia , Ácido Ascórbico/administração & dosagem , Encéfalo/efeitos dos fármacos , Transtornos Cerebrovasculares/tratamento farmacológico , Cistina/administração & dosagem , Glutamina/administração & dosagem , Fármacos Neuroprotetores/farmacologia , Doença de Alzheimer/genética , Doença de Alzheimer/patologia , Doença de Alzheimer/fisiopatologia , Peptídeos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/genética , Animais , Ácido Ascórbico/farmacologia , Comportamento Animal/efeitos dos fármacos , Encéfalo/patologia , Encéfalo/fisiopatologia , Circulação Cerebrovascular/efeitos dos fármacos , Transtornos Cerebrovasculares/patologia , Transtornos Cerebrovasculares/fisiopatologia , Doença Crônica , Cognição/efeitos dos fármacos , Cistina/farmacologia , Suplementos Nutricionais , Modelos Animais de Doenças , Feminino , Glutamina/farmacologia , Mediadores da Inflamação/metabolismo , Masculino , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Atividade Motora/efeitos dos fármacos , Mutação , Estresse Oxidativo/efeitos dos fármacos , Placa Amiloide
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