TNF- α

TNF - α
  • 文章类型: Journal Article
    众所周知,普遍存在的爱泼斯坦-巴尔病毒(EBV)的重新激活与许多疾病有关,包括神经系统疾病.我们小组最近的一项体外研究揭示了EBV及其12个氨基酸的肽糖蛋白M146-157(gM146-157)与神经退行性疾病的关联,viz.,阿尔茨海默病(AD)和多发性硬化症。在这项研究中,我们在体内水平进一步验证了这种关联.通过行为测定,EBV/gM146-157暴露于小鼠会导致认知能力下降,并伴随着焦虑样症状的增加。海马神经元的紊乱,细胞收缩,固缩症,在感染小鼠的大脑中观察到凋亡附件。发现炎症细胞因子,如肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)在感染的小鼠脑组织样品中升高,而TNF-α在这些小鼠的血清中表现出下降。Further,核因子-κB(NF-kB)和神经降压素受体2水平的改变证实了受感染小鼠脑样本中的神经炎症。同样,AD的危险因素,载脂蛋白E4(ApoE4),还发现在EBV/gM146-157攻击的小鼠中蛋白质水平升高。此外,我们还观察到大脑皮层中髓磷脂碱性蛋白的水平升高。总之,我们的结果表明,EBV及其gM146-157肽与神经病理存在整体联系。
    The reactivation of ubiquitously present Epstein-Barr virus (EBV) is known to be involved with numerous diseases, including neurological ailments. A recent in vitro study from our group unveiled the association of EBV and its 12-amino acid peptide glycoprotein M146-157 (gM146-157) with neurodegenerative diseases, viz., Alzheimer\'s disease (AD) and multiple sclerosis. In this study, we have further validated this association at the in vivo level. The exposure of EBV/gM146-157 to mice causes a decline in the cognitive ability with a concomitant increase in anxiety-like symptoms through behavioral assays. Disorganization of hippocampal neurons, cell shrinkage, pyknosis, and apoptotic appendages were observed in the brains of infected mice. Inflammatory cytokines such as tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were found to be elevated in infected mouse brain tissue samples, whereas TNF-α exhibited a decline in the serum of these mice. Further, the altered levels of nuclear factor-kappa B (NF-kB) and neurotensin receptor 2 affirmed neuroinflammation in infected mouse brain samples. Similarly, the risk factor of AD, apolipoprotein E4 (ApoE4), was also found to be elevated at the protein level in EBV/gM146-157 challenged mice. Furthermore, we also observed an increased level of myelin basic protein in the brain cortex. Altogether, our results suggested an integral connection of EBV and its gM146-157 peptide to the neuropathologies.
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  • 文章类型: Journal Article
    背景肿瘤坏死因子-α(TNF-α)在癌症和糖尿病(DM)的发病机制和预后中起关键作用。据报道,许多口腔鳞状细胞癌(OSCC)患者患有相关的合并症,例如2型糖尿病(T2DM)。此外,由于缺乏胰岛素作用,T2DM会加剧炎症。因此,具有T2DM的OSCC患者可能更快速地进展到晚期阶段,导致即使在血糖控制之后也降低存活率,这对肿瘤学家管理这些患者造成挑战。不幸的是,仅根据临床和放射学参数很难预测这些患者的病程。考虑到TNFα在两种疾病进展中的影响,这是一个有趣的生物标记探索。Further,唾液是一种非侵入性的生物液体,可以帮助测量TNF-α水平,从而预测OSCC的预后。不幸的是,关于OSCCDM患者唾液TNF-αnf水平的信息有限。目的本研究的目的是比较有和无DM的OSCC患者的唾液TNF-α。方法取健康个体唾液样本,OSCCDM患者,和无DM的OSCC患者。使用EliKine™人TNF-αELISA试剂盒进行TNF-α水平的定量,酶联免疫吸附试验。数据报告为平均值和标准偏差。为了评估这些群体中唾液TNF-α水平的变化,使用了Kruskal-Wallis测试。结果本研究共纳入30名参与者,每组10名。男性18例,女性12例,平均年龄37.2±4.7岁。对照组之间的TNF-α水平(5142±1.4pg/ml),无DM的OSCC患者(67.43±1.7pg/ml),并记录了患有DM(268±8.5pg/ml)的OSCC患者。与对照组和无DM的OSCC相比,有DM的OSCC的平均唾液TNF-α水平在统计学上较高。结论本研究比较了患有和不患有DM的OSCC患者的唾液TNF-α,并且发现了所检查队列中TNF-α浓度的实质性差异。提供对TNF-α在OSCC背景下的潜在参与的见解,尤其是DM患者。然而,更多的研究是必要的,以建立TNF-α水平之间的关联,OSCC的预后,以及DM的影响。
    Background Tumor necrosis factor-alpha (TNF-α) has a pivotal role in the pathogenesis and prognosis of cancer as well as diabetes mellitus (DM). Many oral squamous cell carcinoma (OSCC) patients are reported to have associated comorbidities such as type 2 diabetes mellitus (T2DM). Furthermore, T2DM exaggerates inflammation due to a lack of insulin action. Therefore, OSCC patients with T2DM may progress to the advanced stage more rapidly resulting in reduced survival even after glycemic control creating a challenge to oncologists in managing these patients. Unfortunately, it is difficult to predict the course of disease in these patients just based on clinical and radiological parameters. Considering the impact of TNF alpha in both disease progression, it is an interesting biological marker to explore. Further, saliva being a noninvasive biological fluid can help measure the TNF-α levels, thereby predicating the prognosis of OSCC. Unfortunately, there is limited information about the salivary TNF-αnf levels in OSCC patients with DM. Aim The aim of this study was to compare the salivary TNF-α in OSCC patients with and without DM. Methods Saliva samples were obtained from healthy individuals, OSCC patients with DM, and OSCC patients without DM. The quantification of TNF-α levels was performed using the EliKine™ Human TNF-α ELISA Kit, an enzyme-linked immunosorbent assay. The data were reported as means and standard deviations. To assess variations in salivary TNF-α levels among these groups, the Kruskal- Wallis test was employed. Results The study included a total of 30 participants with 10 in each group. There were 18 males and 12 females with a mean age of 37.2± 4.7 years. The TNF-α levels between the control group (51+42±1.4 pg/ml), OSCC patients without DM (67.43 ±1.7 pg/ml), and OSCC patients with DM (268±8.5 pg/ml) were noted. The mean salivary TNF-α level was statistically higher in OSCC with DM compared to the control and OSCC without DM group.  Conclusion The investigation compared the salivary TNF-α in OSCC patients with and without DM and has uncovered substantial differences in TNF-α concentrations within the examined cohorts, providing insights into the potential involvement of TNF-α in the context of OSCC, especially in patients with DM. Nevertheless, additional research is imperative to establish associations between TNF-α levels, the prognosis of OSCC, and the impact of DM.
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  • 文章类型: Journal Article
    目的:自闭症谱系障碍(ASD)是全球关注的问题,影响了大约7500万人。各种因素导致ASD,包括一些疫苗中发现的含汞防腐剂,如硫柳汞(Thim)。这项研究探讨了胞磷胆碱是否可以作为ASD小鼠模型中Thim诱导的神经元损伤的治疗选择。此外,本研究调查了胞磷胆碱对α7nAChRs/Akt/Nrf2/caspase-3途径的影响,可能参与ASD的发展。
    方法:本研究将新生小鼠分为四组。对照组接受生理盐水注射,而Thim组在出生后第7、9、11和15天肌肉注射3000μgHg/kgThim。给予两个胞磷胆碱组Thim,随后腹膜内注射250mg/kg或500mg/kg胞磷胆碱三周。之后,评估了各种参数,包括增长,行为,脑组织病理学,氧化应激,凋亡,和炎症标志物。
    结果:未经治疗的Thim暴露小鼠表现出明显的脑损伤,胞磷胆碱治疗大大缓解。这种有益作用与大脑α7nAChRs和Akt的表达和浓度增加有关。Nrf2的脑含量增加,乙酰胆碱的海马含量增加。胞二磷胆碱治疗降低了大脑氧化应激标志物(MDA和NO)的水平,凋亡标志物caspase-3和促炎标志物(NF-κB,TNF-α,和IL-1β)。该药物还增加了大脑GPx的活性。
    结论:根据本研究的结果,α7nAChRs途径似乎对胞磷胆碱治疗Thim诱导的小鼠ASD的治疗效果至关重要。
    OBJECTIVE: Autism spectrum disorder (ASD) is a global concern,affecting around 75 million individuals.Various factors contribute to ASD,including mercury-containing preservatives like thimerosal (Thim) found in some vaccines.This study explored whether citicoline could be a therapeutic option for Thim-induced neuronal damage in a mouse model of ASD.Additionally,the study investigated the effects of citicoline on the α7nAChRs/Akt/Nrf2/caspase-3 pathway,which may be involved in the development of ASD.
    METHODS: The study separated newborn mice into four groups.The control group received saline injections,while the Thim group received intramuscular injections of 3000 μg Hg/kg Thim on days 7,9,11,and 15 after birth.The two citicoline groups were administered Thim followed by intraperitoneal injections of 250 mg/kg or 500 mg/kg citicoline for three weeks.Afterward,various parameters were assessed, including growth,behavior,brain histopathology,oxidative stress,apoptotic,and inflammatory markers.
    RESULTS: Untreated Thim-exposed mice exhibited significant brain damage,which was substantially alleviated by citicoline treatment.This beneficial effect was associated with increased expressions and concentrations of brain α7nAChRs and Akt, increased brain content of Nrf2, and the hippocampus contents of acetylcholine. Citicoline treatment decreased the brain levels of oxidative stress markers (MDA and NO),the apoptotic marker caspase-3,and pro-inflammatory markers (NF-κB,TNF-α,and IL-1β). The drug also increased the brain GPx activity.
    CONCLUSIONS: Based on the results of this study,the α7nAChRs pathway appears to be essential for the therapeutic effectiveness of citicoline in treating Thim-induced ASD in mice.
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  • 文章类型: Journal Article
    作为从自然资源中发现新药物的一部分,本研究旨在探索查尔酮Indl-2与不同抗生素组联合使用的抗菌潜力。通过两种查耳酮,抗生素对大肠杆菌的不同培养物的MIC降低高达8倍。在两种使用的化合物中,即1-(3\',4,\'5\'-三甲氧基苯基)-3-(3-吲哚基)-丙-2-烯酮(6,Indl-2),没食子酸的查尔酮衍生物(Indl-2)最好与四环素(TET)协同作用,并发现抑制外排转运蛋白,如通过ATPase测定和对接研究证实的溴化乙锭外排明显。在组合中,Indl-2杀死MDREC-KG4细胞,TET的抗生素后效应(PAE)延长,TET的突变预防浓度(MPC)也降低。体内研究表明,Indl-2降低了TNF-α的浓度。在急性口服毒性研究中,Indl-2是无毒的并且在2000mg/kg的剂量下耐受良好。也许,该研究将报道没食子酸衍生的查尔酮作为通过抑制初级外排泵起作用的增效剂。
    As a part of novel discovery of drugs from natural resources, present study was undertaken to explore the antibacterial potential of chalcone Indl-2 in combination with different group of antibiotics. MIC of antibiotics was reduced up to eight folds against the different cultures of E. coli by both chalcones. Among the two compounds, the i. e. 1-(3\', 4,\'5\'-trimethoxyphenyl)-3-(3-Indyl)-prop-2-enone (6, Indl-2), a chalcone derivative of gallic acid (Indl-2) was better along with tetracycline (TET) worked synergistically and was found to inhibit efflux transporters as obvious by ethidium bromide efflux confirmed by ATPase assays and docking studies. In combination, Indl-2 kills the MDREC-KG4 cells, post-antibiotic effect (PAE) of TET was prolonged and mutant prevention concentration (MPC) of TET was also decreased. In-vivo studies revealed that Indl-2 reduces the concentration of TNF-α. In acute oral toxicity study, Indl-2 was non-toxic and well tolerated up-to dose of 2000 mg/kg. Perhaps, the study is going to report gallic acid derived chalcone as synergistic agent acting via inhibiting the primary efflux pumps.
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  • 文章类型: Journal Article
    大多数草药在治疗各种疾病中起重要作用。因为多巴胺在抗炎过程中起作用,并且这种物质在马齿莲本地植物中的存在,研究这种植物在治疗神经系统疾病中的抗炎特性是很有趣的。
    这项研究的目的是评估受P.oleraceaL.提取影响的脂多糖(LPS)处理的小胶质细胞中NO的产生和炎症基因的表达水平。
    P.分离出甘草毛状根提取物,从胶质细胞中分离出大鼠的原代小胶质细胞,并通过免疫细胞化学分析证实。用不同浓度的甘蓝提取物预处理小胶质细胞,然后用1μg处理。mL-1LPS。对照组不接受任何治疗。通过Griess方法测量培养上清液中的NO水平。使用Real-TimePCR评估了LPS处理的小胶质细胞中iNOS(诱导型一氧化氮合酶)和TNF-α(肿瘤坏死因子-α)的mRNA表达水平。
    本研究确定0.1mg。mL-1的甘蓝提取物降低了大鼠小胶质细胞中NO的产生。不同浓度的甘蓝提取物对LPS处理的细胞活力没有显著影响。实时荧光定量PCR结果表明,甘蓝提取物抑制了LPS处理细胞中iNOS和TNF-α的mRNA表达水平。MTT法检测表明,甘蓝提取物无细胞毒性,观察到的抗炎P.oleraceaL.提取物的作用不是由于细胞死亡。
    P.甘草提取物作为抗炎剂可能有助于治疗炎症性疾病。
    UNASSIGNED: Most herbs play significant roles in the treatment of various diseases. Because dopamine functions in the anti-inflammatory process and the presence of this substance in Portulaca Oleracea L. native plant, investigating this plant\'s anti-inflammatory properties in treating neurological diseases is interesting.
    UNASSIGNED: The objective of this study was to estimate the NO production and the expression level of inflammatory genes in lipopolysaccharide (LPS)-treated microglial cells affected by P. oleracea L. extraction.
    UNASSIGNED: P. oleracea L. hairy root extract was isolated, and the primary microglial cell of the rat was isolated from glial cells and confirmed by immunocytochemistry analysis. Microglial cells were pretreated with different concentrations of P. oleracea L. extract and then treated with 1 μg.mL-1 LPS. The control group did not receive any treatment. The NO level in culture supernatants was measured by the Griess method. The mRNA expression levels of iNOS (inducible Nitric oxide synthase) and TNF-α (tumor necrosis factor-alpha) in LPS-treated microglial cells were evaluated using Real-Time PCR.
    UNASSIGNED: The present study determined that 0.1 mg. mL-1 of the P. oleracea L. extract decreased the NO production in rat microglial cells. Different concentrations of the P. oleracea L. extract had no prominent effects on LPS-treated cell viability. The results of real-time PCR indicated that P. oleracea L extracts suppressed the mRNA expression levels of iNOS and TNF-α in LPS-treated cells. MTT assay determined that P. oleracea L. extract was not cytotoxic, and the anti-inflammatory P. oleracea L. extract effects observed were not because of cell death.
    UNASSIGNED: P. oleracea L. extract might be helpful as an anti-inflammatory agent in treating inflammatory diseases.
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  • 文章类型: Journal Article
    背景:由于其高死亡率和功能性后遗症,中枢神经系统(CNS)结核病(TB)是最严重的结核病形式。结核病有几种鉴别诊断;它也会导致次要情况,如血管炎。
    方法:155个活检,在2008-2013年的5,386例登记活检中,155例患者符合不明病因血管炎和脑血管疾病证据的标准.对这些进行分析以评估中枢神经系统TB的存在。使用SuzaanMarais(SM)临床结核病标准评估选定的病例。之后,进行Ziehl-Neelsen(ZN)染色和聚合酶链反应(PCR)以扩增结核分枝杆菌的插入序列IS6110的片段。通过ZN染色和PCR,21例患者符合确定的结核病标准,2符合可能的结核病标准。肿瘤坏死因子(TNF)-α,TNF-R1和TNF-R2通过免疫组织化学在23名选定患者的福尔马林固定石蜡包埋(FF-PE)组织的组织学切片中测定。
    结果:几乎一半的病例存在肉芽肿性结核。TNF-R1和TNF-R2主要在血管中表达,组织细胞,和巨噬细胞。TNF-R2表达高于其他标志物,这表明对结核分枝杆菌的抗炎反应。
    结论:TB的组织病理学表现并不总是局限于肉芽肿,脓肿,或脑膜炎;也有临床表现,仅表现为神经和血管组织的慢性炎症。
    Central nervous system (CNS) tuberculosis (TB) is the most severe form of TB due to its high mortality and functional sequelae. There are several differential diagnoses for TB; and, it can also cause secondary conditions, such as vasculitis.
    155 biopsies, corresponding to 155 different patients out of 5,386 registered biopsies from 2008-2013, met the criteria of unknown etiology vasculitis and evidence of cerebral vascular disease. These were analyzed to assess the presence of central nervous system TB. The selected cases were assessed with Suzaan Marais (SM) criteria for clinical tuberculosis. After that, Ziehl-Neelsen (ZN) staining and polymerase chain reaction (PCR) were performed to amplify a fragment of the insertion sequence IS6110 of M. tuberculosis. 21 patients met the criteria for definitive tuberculosis by ZN staining and PCR, and 2 met the criteria for possible tuberculosis. Tumor necrosis factor (TNF)-α, TNF-R1, and TNF-R2 were determined by immunohistochemistry in histological sections from formalin-fixed paraffin-embedded (FF-PE) tissues in the 23 selected patients.
    Granulomatous TB was present in almost half of the cases. TNF-R1 and TNF-R2 were expressed mainly in blood vessels, histiocytes, and macrophages. TNF-R2 expression was higher than the other markers, which suggests an anti-inflammatory response against M. tuberculosis.
    The histopathological presentation of TB is not always limited to granulomas, abscesses, or meningitis; there are also clinical presentations characterized only with chronic inflammation of nervous and vascular tissue.
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  • 文章类型: Journal Article
    这项研究的目的是比较促炎和趋化细胞因子作为肿瘤坏死因子-α(TNF-α)的表达水平的变化。白细胞介素(IL)-17A和IL-8,下调细胞因子IL-10,除了血管细胞粘附分子-1(VCAM-1)基因在不同组的肝硬化患者中由于各种病因。这项病例对照研究包括84名患有病毒性和非病毒性病因肝硬化的患者以及20名性别和年龄匹配的健康对照。所有患者都接受了详细的病史记录,临床检查,和肝功能评估。TNF-α的表达水平,IL-17A,通过实时PCR评估外周血单核细胞中的IL-8,IL-10和VCAM-1。相对于对照组,肝硬化患者的测试基因表达水平发生了明显变化。除IL-10外,所有基因的表达水平均高于非病毒组。大多数肝功能参数的显着相关性与TNF-α在病毒和非病毒组观察到,其次是IL-17A。TNF-α和IL-17A升高是儿童C级肝硬化进展的潜在危险因素。
    The study aim was to compare the alterations in the expression levels of proinflammatory and chemotactic cytokines as tumor necrosis factor-alpha (TNF-α), interleukin (IL)-17A and IL-8, the down regulatory cytokine IL-10, in addition to the vascular cell adhesion molecule-1 (VCAM-1) gene in different groups of patients with cirrhosis due to various etiologies. This case-control study included 84 patients suffering from cirrhosis of viral and non-viral etiologies and 20 sex and age-matched healthy controls. All patients were subjected to detailed history taking, clinical examination, and liver function assessment. The expression levels of TNF-α, IL-17A, IL-8, IL-10, and VCAM-1 were assessed in peripheral blood mononuclear cells by real-time PCR. Patients with cirrhosis showed marked changes in the tested gene expression levels relative to the control group. Higher expression levels of all genes except IL-10 were seen in patients of the viral than in the non-viral groups. Most of the significant correlations of liver function parameters were observed with TNF-α in both the viral and non-viral groups, followed by IL-17A. Increased TNF-α and IL-17A presented potential risk factors for disease progression to cirrhosis of Child class C.
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  • 文章类型: Journal Article
    目的:研究苏金单抗治疗银屑病对患者血清不同功能细胞因子和炎症介质的影响。方法:采用酶联免疫吸附法检测与固有免疫相关的白细胞介素(IL)-1β和IL-1RA;与中性粒细胞相关的IL-6,IL-18和生长调节癌基因α(GROα);IL-12,坏死因子(TNF)-α,和干扰素(IFN)-γ相关的Th1;IL-23,IL-17A,和IL-22与Th17相关;胸腺激活调节趋化因子(TARC),IL-13和防御素β2(DEFB2)与Th2相关;血管内皮生长因子(VEGF)-A和IL-10与血管生成相关;IFN-γ与12例接受苏金单抗治疗的普通银屑病患者和15例健康对照的外周血中败血症相关。IL-23,IL-17A,IL-22与Th17;TARC,IL-13,DEFB2与Th2相关;VEGF-A,与血管生成相关的IL-10和与脓毒症相关的降钙素原(PCT)。上述细胞因子在治疗前后的表达差异及其与银屑病病情严重程度的相关性[银屑病面积严重程度指数(PASI)评分],年龄,并对病程进行分析。
    结果:纳入的中重度银屑病患者治疗前平均PASI评分为21.6±11.0,治疗后降低至1以下。血清IL-6;IL-18,GROα,IFN-γ,TNF-α,VEGF-A,IL-17A明显高于正常水平。IL-17A和IFN-γ与病程、年龄呈正相关,IL-18与PASI评分呈正相关。IL-6,GROα的表达水平,VEGF-A,IFN-γ,TNF-α,与治疗前相比,苏金单抗治疗后IL-17A和IL-23显著降低,但IFN-γ的表达水平,VEGF-A,TARC,结论:苏金单抗通过拮抗IL-17A,同时降低IL-6、GROα、VEGF-A,IFN-γ,TNF-α,IL-17A,IL-23
    OBJECTIVE: To investigate the effects of secukinumab treatment for psoriasis on different functional cytokines and inflammatory mediators in patients\' serum METHODS: Enzyme-linked immunosorbent assay was used to detect interleukin (IL)-1β and IL-1RA associated with intrinsic immunity; IL-6, IL-18, and growth regulated oncogene alpha (GROα) associated with neutrophils; IL-12, tumour necrosis factor (TNF)-α, and interferon (IFN)-γ associated with Th1; IL-23, IL-17A, and IL-22 associated with Th17; Thymus activation regulated chemokine (TARC), IL-13, and defensin beta 2 (DEFB2) associated with Th2; Vascular endothelial growth factor (VEGF)-A and IL-10 associated with angiogenesis; and IFN-γ associated with sepsis in the peripheral blood of 12 patients with common psoriasis treated with secukinumab and 15 healthy controls. IL-23, IL-17A, IL-22 associated with Th17; TARC, IL-13, DEFB2 associated with Th2; VEGF-A, IL-10 associated with angiogenesis and procalcitonin (PCT) associated with sepsis. The differences in expression of the above cytokines before and after treatment and the correlation with psoriasis disease severity[Psoriasis Area Severity Index(PASI) score], age, and disease duration were analyzed.
    RESULTS: The mean PASI score of the enrolled patients with moderate to severe psoriasis was 21.6 ± 11.0 before treatment and decreased to below 1 after treatment. Serum IL-6; IL-18, GROα, IFN-γ, TNF-α, VEGF-A, and IL-17A were significantly higher than normal. And IL-17A and IFN-γ were positively correlated with disease duration and age, and IL-18 was positively correlated with PASI score. The expression levels of IL-6, GROα, VEGF-A, IFN-γ, TNF-α, IL-17A and IL-23 were significantly lower after secukinumab treatment compared with those before treatment, but the expression levels of IFN-γ, VEGF-A, TARC, IL-13, and DEFB2 were still significantly higher than those of normal subjects after treatment CONCLUSIONS: secukinumab clears skin lesions by antagonizing IL-17A and simultaneously decreasing the expression levels of IL-6, GRO α, VEGF-A, IFN-γ, TNF-α, IL-17A, and IL-23.
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  • 文章类型: Journal Article
    创伤性脑损伤(TBI)仍然是影响全球数百万人的流行疾病之一。TBI有一系列次要属性,包括兴奋性毒性,轴突变性,神经炎症,氧化应激,和凋亡。神经炎症是由于小胶质细胞和促炎细胞因子的激活而引起的。小胶质细胞的活化触发TNF-α,其顺序地导致NF-kB的触发和上调。本研究的目的是在成年白化病雄性小鼠模型中研究维生素B1作为TBI诱导的神经炎症抑制记忆障碍以及突触前和突触后功能障碍的神经保护剂的潜力。使用减重方法诱导TBI,该方法引起小胶质细胞激活,导致神经炎症以及突触功能障碍,从而导致成年小鼠的记忆障碍。通过腹膜内途径给予维生素B17天。为了分析维生素B1的记忆障碍和功效,进行了Morris水迷宫和Y迷宫测试。用维生素B1处理的实验小鼠的逃避潜伏期和短期记忆与参考小鼠有显著差异。Westernblot结果显示,维生素B1通过下调促炎细胞因子(NFκ-B,TNF-α)。维生素B1还通过上调突触素和突触后密度蛋白95(PSD-95),通过减少记忆功能障碍并恢复突触前和突触后的活性,证明了其作为令人信服的神经保护剂的价值。
    Traumatic Brain Injury (TBI) remains one of the prevailing disorders that affect millions of people around the globe. There is a cascade of secondary attributes attached to TBI including excitotoxicity, axonal degeneration, neuroinflammation, oxidative stress, and apoptosis. Neuroinflammation is caused due to the activation of microglia along with pro-inflammatory cytokines. The activation of microglia triggers TNF-α which sequentially results in the triggering and upregulation of NF-kB. The aim of the current research was to investigate vitamin B1\'s potential as neuroprotective agent against TBI-induced neuroinflammation arbitrated memory impairment together with pre- and post-synaptic dysfunction in an adult albino male mice model. TBI was induced using the weight-drop method which caused the microglial activation resulting in neuroinflammation along with synaptic dysfunction leading to the memory impairment of the adult mice. Vitamin B1 was administered for seven days via the intraperitoneal pathway. To analyze the memory impairment and efficacy of vitamin B1, Morris water maze and Y-maze tests were performed. The escape latency time and short-term memories of the experimental mice treated with vitamin B1 were significantly different from the reference mice. The western blot results showed that vitamin B1 has reduced neuroinflammation by downregulating proinflammatory cytokines (NFκ-B, TNF- α). Vitamin B1 also proved its worthiness as a convincing neuroprotective agent by reducing memory dysfunction and recovering the activities of pre- and post-synapse via upregulation of synaptophysin and Postsynaptic density protein 95 (PSD-95).
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  • 文章类型: Journal Article
    Tumor necrosis factor-alpha (TNF-α) is a potent pro-inflammatory factor that plays an important role in establishing a complicated connection between inflammation and cancer. TNF-α promotes tumor proliferation, migration, invasion, and angiogenesis according to numerous studies. Studies have shown the significant role of STAT3, a downstream transcription factor of another important inflammatory cytokine, IL-6 in the development and progression of different tumors especially colorectal cancer. In the present study, we investigated whether TNF-α has a role in proliferation and apoptosis of colorectal cancer cells through STAT3 activation. HCT116 cell line as human colorectal cancer cells was used in this study. Major assays were MTT assay, reverse transcription-PCR (RT-PCR), flow cytometric analysis, and ELISA. Results showed that TNF-α significantly increased the phosphorylation of STAT3 and expression of all the STAT3 target genes related to cell proliferation, survival, and metastasis compared with control. Moreover, our data showed that the STAT3 phosphorylation and expression of its target genes significantly were reduced in the presence of TNF-α + STA-21 compared with TNF-α-treated group demonstrating that the increase in genes expression partially was due to the TNF-α-induced STAT3 activation. On the other hand, STAT3 phosphorylation and mRNA levels of its target genes were partially decreased in the presence of TNF-α + IL-6R supporting the indirect pathway of STAT3 activation by TNF-α through inducing IL-6 production in cancer cells. Given the growing evidence for STAT3 as a key mediator of inflammation-induced colon cancer, our findings support further investigation of STAT3 inhibitors as potential cancer therapies.
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