Glia maturation factor

胶质细胞成熟因子
  • 文章类型: Journal Article
    弓形虫,亲神经的原生动物,感染了世界人口的三分之一。寄生虫可侵入多种有核细胞,但优选神经胶质细胞。胶质细胞成熟因子β(GMFβ),在中枢神经系统中高水平表达的17KD蛋白主要与神经退行性疾病如阿尔茨海默病有关,帕金森病,和多发性硬化症。我们旨在确定弓形虫感染的人神经母细胞瘤细胞系中GMFβ的表达水平及其与其他促炎因子(IL33,SDF1和CCL2)的关系。
    用5×106(1∶1比例)感染人神经母细胞瘤(SK_NMCC535)细胞系。细胞裂解和离心后收集上清液。使用YektaTajhizRNA提取试剂盒提取总RNA。cDNA是根据RevertAid第一链cDNA合成试剂盒制造商的方案合成的(Parstous,cDNA合成试剂盒,伊朗)。每个引物对的特异性(GMFβ,IL33、SDF1和CCL2)由NCBIBLAST提供。使用实时PCR测量基因表达水平。所有实验均在哈马丹医科大学进行,2022年伊朗西部。
    GMFβ显著增加至1.35倍(P=0.007)。神经母细胞瘤细胞中GMFβ表达的增加与促炎因子的增加一致(CCL2(0.47),IL33(0.152)和,SDF1(1.33))。
    GMFβ上调可以成为神经细胞破坏的一种新指标。
    UNASSIGNED: Toxoplasma gondii, a neurotropic protozoan, infects up one to third of the world population. The parasite can invade a wide variety of nucleated cells but preferably glial cells. Glia maturation factor β (GMFβ), a 17KD protein expressed at high levels in the central nervous system is predominantly related to neurodegenerative diseases such as Alzheimer\'s disease, Parkinson\'s disease, and Multiple sclerosis. We aimed to determine the expression level of GMFβ and its relation to other pro-inflammatory factors (IL33, SDF1, and CCL2) on T. gondii infected human neuroblastoma cell line.
    UNASSIGNED: The human neuroblastoma (SK_NMC C535) cell line was infected by 5×106 (1:1 ratio). The supernatant was collected after cell lysis and centrifugation. Total RNA was extracted using the Yekta Tajhiz RNA extraction kit. cDNA was synthesized based on RevertAid First Strand cDNA Synthesis Kit manufacturer\'s protocol (Parstous, cDNA synthesis kit, Iran). The specificity of each primer pair (GMFβ, IL33, SDF1, and CCL2) was provided by NCBI BLAST. Gene expression level was measured using Real-Time PCR. All experiments were conducted at the Hamadan University of Medical Sciences, western Iran in 2022.
    UNASSIGNED: The GMFβ increased significantly up to 1.35-fold (P=0.007). The increase in GMFβ expression in neuroblastoma cells was consistent with the increase in pro-inflammatory factors (CCL2 (0.47), IL33 (0.152) and, SDF1 (1.33)).
    UNASSIGNED: GMFβ upregulation can be a novel indicator of the destruction of nerve cells.
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  • 文章类型: Journal Article
    肉芽肿真菌病真菌(GMF)是一种罕见的真菌病(MF),其特征是与肿瘤性淋巴样人群相关的肉芽肿浸润,与常规MF相比,预后较差。T辅助轴(Th)的上调,尤其是Th17,在几种炎性/感染性肉芽肿性皮肤病的发病机制中起重要作用,但其在GMF中的作用至今仍未阐明。在这项研究中,我们评估了Th1(Tbet)的免疫组织化学表达,Th2(GATA-3),Th17(RORγT),T监管(Foxp3),GMF和MF大细胞转化(MFLCT)患者队列中的免疫检查点(IC)(PD-1和PD-L1)标志物。研究了49例患者(28例GMF和21例MFLCT)的皮肤活检。GMF患者与早期临床阶段(p=0.036)和较低水平的乳酸脱氢酶(p=0.042)有关。Tbet阳性的细胞百分比增加(p=0.017),RORγT(p=0.001),在GMF标本中也观察到PD-L1(p=0.011),而在MFLCT病例中检测到更强的PD-1强度。在这个队列中,LCT,RORγT<10%,Foxp3<10%,年龄,在单因素分析中,晚期与较差的总生存期(OS)相关。GMF显示Th1(细胞反应)和Th17(自身免疫)表型,见于早期MF和肉芽肿过程,分别,这可能与GMF的组织病理学表现和生物学行为有关。需要进行涉及更多病例和更敏感技术的进一步研究。
    Granulomatous Mycosis Fungoides (GMF) is a rare form of mycosis fungoides (MF) characterized by a granulomatous infiltrate associated with the neoplastic lymphoid population and is considered to have a worse prognosis compared with regular MF. The upregulation of the T helper (Th) axis, especially Th17, plays an important role in the pathogenesis of several inflammatory/infectious granulomatous cutaneous diseases, but its role in GMF is still not elucidated to date. In this study, we evaluated the immunohistochemical expression of Th1 (Tbet), Th2 (GATA-3), Th17 (RORγT), T regulatory (Foxp3), and immune checkpoint (IC) (PD-1 and PD-L1) markers in a cohort of patients with GMF and MF with large cell transformation (MFLCT). Skin biopsies from 49 patients (28 GMF and 21 MFLCT) were studied. Patients with GMF were associated with early clinical stage (p = 0.036) and lower levels of lactate dehydrogenase (p = 0.042). An increased percentage of cells positive for Tbet (p = 0.017), RORγT (p = 0.001), and PD-L1 (p = 0.011) was also observed among the GMF specimens, while a stronger PD-1 intensity was detected in cases of MFLCT. In this cohort, LCT, RORγT < 10%, Foxp3 < 10%, age, and advanced stage were associated with worse overall survival (OS) in univariate analysis. GMF demonstrated Th1 (cellular response) and Th17 (autoimmunity) phenotype, seen in early MF and granulomatous processes, respectively, which may be related to the histopathological appearance and biological behavior of GMF. Further studies involving larger series of cases and more sensitive techniques are warranted.
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  • 文章类型: Journal Article
    公众对转基因食品(GMF)的看法一直受到激烈的辩论和审查。通常,围绕GMF的讨论往往只围绕与消费相关的潜在健康风险。然而,必须承认公众对转基因食品的看法是多方面的,包括环境问题,伦理考虑,和经济影响。本文采用捷克人口的代表性样本(N=884,年龄18-90岁,M±SD:48.17±17.72;53.40%女性,18.04%拥有高等教育)。该研究依赖于行为改变模型和健康信念模型。我们采用分层序数回归来研究信息的影响,环境问题,感知到的健康风险,饮食习惯,购买习惯,和GMF接受的社会人口统计学。结果表明,(不)购买GMF的意愿主要是由健康风险驱动的-环境问题在很大程度上并不重要。信息提供对GMF接受的影响被证明是积极的,建议信息和教育成为创造公众接受度的主要渠道。与GMF相关的信息的内在兴趣对GMF道德的感知产生了不利影响。GMF的好处被证明与GMF的接受无关,表明信息活动的差距。这项研究为决策者提供了有价值的见解,公共卫生专业人员,和市场研究人员将GMF议程有效地传达给公众。
    The public perspective on genetically modified foods (GMFs) has been intensely debated and scrutinized. Often, discussions surrounding GMF tend to revolve solely around the potential health risks associated with their consumption. However, it is essential to acknowledge that public perceptions of genetically modified foods are multifaceted, encompassing environmental concerns, ethical considerations, and economic implications. This paper studies the factors predicting GMF acceptance employing the representative sample of the Czech population (N = 884, aged 18-90 years, M ± SD: 48.17 ± 17.72; 53.40% women, 18.04% with higher education). The research relies on the Behavioral Change Model and the Health Belief Model. We employ hierarchical ordinal regressions to study the effects of information, environmental concerns, perceived health risks, food habits, purchasing habits, and socio-demographics on GMF acceptance. The results suggest that the (un)willingness to purchase GMF is primarily driven by the health risks - the environmental concerns were largely unimportant. The impact of information provision on GMF acceptance proved positive, suggesting information and education to be the main channels of creating public acceptance. The intrinsic interest regarding information related to GMF had an adverse impact on the perception of GMF morality. The benefits of the GMF proved unrelated to the GMF acceptance, indicating the gap in the information campaign. The research provides valuable insights for policymakers, public health professionals, and market researchers to communicate the GMF agenda effectively to the general public.
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  • 文章类型: Journal Article
    帕金森病(PD)是第二常见的进行性神经退行性疾病,其特征是多巴胺能神经元丢失和运动障碍。PD痴呆(PDD)是影响许多PD患者的认知障碍。我们先前已经证明了神经胶质成熟因子(GMF)在AD的神经炎症和神经变性中的促炎作用,PD,创伤性脑损伤(TBI),以及人脑和动物模型中的实验性自身免疫性脑脊髓炎(EAE)。本研究的目的是研究GMF在人类PDD脑中的表达。我们使用免疫染色分析了PDD大脑黑质(SN)和纹状体中GMF蛋白与淀粉样蛋白斑(AP)和神经原纤维缠结(NFT)的表达模式。我们检测到大量GMF阳性胶质纤维酸性蛋白(GFAP)反应性星形胶质细胞,特别是在PDD中SN和纹状体内多巴胺能神经元退化的区域。此外,我们在APs附近的神经胶质细胞中观察到过量的GMF,PDD和非PDD患者的SN和纹状体中的NFTs。我们发现大多数GMF阳性免疫反应性神经胶质细胞与GFAP反应性星形胶质细胞共定位。我们的发现表明GMF可能参与了PDD的发病机理。
    Parkinson\'s disease (PD) is the second most common progressive neurodegenerative disease characterized by the presence of dopaminergic neuronal loss and motor disorders. PD dementia (PDD) is a cognitive disorder that affects many PD patients. We have previously demonstrated the proinflammatory role of the glia maturation factor (GMF) in neuroinflammation and neurodegeneration in AD, PD, traumatic brain injury (TBI), and experimental autoimmune encephalomyelitis (EAE) in human brains and animal models. The purpose of this study was to investigate the expression of the GMF in the human PDD brain. We analyzed the expression pattern of the GMF protein in conjunction with amyloid plaques (APs) and neurofibrillary tangles (NFTs) in the substantia nigra (SN) and striatum of PDD brains using immunostaining. We detected a large number of GMF-positive glial fibrillary acidic protein (GFAP) reactive astrocytes, especially abundant in areas with degenerating dopaminergic neurons within the SN and striatum in PDD. Additionally, we observed excess levels of GMF in glial cells in the vicinity of APs, and NFTs in the SN and striatum of PDD and non-PDD patients. We found that the majority of GMF-positive immunoreactive glial cells were co-localized with GFAP-reactive astrocytes. Our findings suggest that the GMF may be involved in the pathogenesis of PDD.
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  • 文章类型: Journal Article
    细胞如何严格控制分支肌动蛋白丝阵列的形成和周转以驱动细胞运动,内吞作用,和其他细胞过程仍然没有被很好地理解。这里,我们研究了Arp2/3复合物的两个结合伴侣之间的机制关系,胶质细胞成熟因子(GMF)和皮质肌动蛋白。个别地,GMF和cortactin对肌动蛋白丝分支的稳定性有相反的影响,但它是未知的,他们如何协同工作,以管理分支机构的营业额。使用TIRF显微镜,我们观察到GMF的分支去稳定活性被cortactin(IC50=1.3nM)有效阻断,这种抑制需要cortactin与Arp2/3复合物的直接相互作用。解释这些结果的最简单的模型是结合Arp2/3复合物的竞争。然而,我们发现cortactin和GMF在溶液中不竞争游离的Arp2/3复合物。Further,我们使用单分子分析表明,分支连接处的cortactin的结合率(3×107s-1M-1)和解离率(0.03s-1)受过量GMF的影响最小。一起,这些结果表明,皮质肌动蛋白以高亲和力与分支连接结合,它阻止了GMF的不稳定影响,可能是通过一种本质上是变构的机制。此外,我们在肌动蛋白丝分支连接处(Kd=0.9nM)和丝侧(Kd=206nM)测量的cortactin亲和力比以前报道的强约20倍.这些观察结果有助于对Arp2/3复合物如何通过多个输入的整合来调节的分子复杂性的新观点。
    How cells tightly control the formation and turnover of branched actin filament arrays to drive cell motility, endocytosis, and other cellular processes is still not well understood. Here, we investigated the mechanistic relationship between two binding partners of the Arp2/3 complex, glia maturation factor (GMF) and cortactin. Individually, GMF and cortactin have opposite effects on the stability of actin filament branches, but it is unknown how they work in concert with each other to govern branch turnover. Using TIRF microscopy, we observe that GMF\'s branch destabilizing activities are potently blocked by cortactin (IC50 = 1.3 nM) and that this inhibition requires direct interactions of cortactin with Arp2/3 complex. The simplest model that would explain these results is competition for binding Arp2/3 complex. However, we find that cortactin and GMF do not compete for free Arp2/3 complex in solution. Further, we use single molecule analysis to show that cortactin\'s on-rate (3 ×107 s-1 M-1) and off-rate (0.03 s-1) at branch junctions are minimally affected by excess GMF. Together, these results show that cortactin binds with high affinity to branch junctions, where it blocks the destabilizing effects of GMF, possibly by a mechanism that is allosteric in nature. In addition, the affinities we measure for cortactin at actin filament branch junctions (Kd = 0.9 nM) and filament sides (Kd = 206 nM) are approximately 20-fold stronger than previously reported. These observations contribute to an emerging view of molecular complexity in how Arp2/3 complex is regulated through the integration of multiple inputs.
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  • 文章类型: Journal Article
    肉芽肿性皮肤T细胞淋巴瘤包括具有明显肉芽肿性炎症(GMF)和肉芽肿性松弛皮肤(GSS)的真菌病,在WHO分类中列为真菌病(MFs)的亚型。1这些重叠的实体具有共同的临床和组织病理学特征,可以提出诊断挑战。肉芽肿浸润的优势和经常稀疏的淋巴细胞浸润,通常具有最小的细胞学异型性,这些特征分散了正确的诊断,即使由临床医生抚养。我们描述了3例肉芽肿性皮肤T细胞淋巴瘤的临床和组织病理学特征,说明GMF和GSS之间的密切临床和病理关系,并强调肉芽肿浸润可能存在的诊断困难。此外,我们展示,第一次,在相当大比例的经典(Alibert-Bazin)MF病变中,有相当大的弹性溶解,因此假定GMF和GSS之间观察到的差异是其解剖位置的程度之一,是次要的,而不是反映有意义的单独实体。
    UNASSIGNED: Granulomatous cutaneous T-cell lymphoma includes mycosis fungoides with significant granulomatous inflammation (GMF) and granulomatous slack skin (GSS), listed in the WHO classification as a subtype of mycosis fungoides (MFs). 1 These overlapping entities have shared clinical and histopathologic features which can present a diagnostic challenge. The dominance of the granulomatous infiltrate and the often sparse lymphocytic infiltrate frequently with minimal cytological atypia are features that distract from the correct diagnosis, even when raised by the clinician. We describe the clinical and histopathologic characteristics of 3 cases of granulomatous cutaneous T-cell lymphoma, illustrate the close clinical and pathologic relationship between GMF and GSS and emphasize the diagnostic difficulties that the granulomatous infiltrate can present. Furthermore, we demonstrate, for the first time, considerable elastolysis in a significant proportion of classical (Alibert-Bazin) MF lesions and therefore postulate that the differences observed between GMF and GSS are one of degree and secondary to their anatomic location rather than reflecting meaningful separate entities.
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  • 文章类型: Randomized Controlled Trial
    (1)背景:虽然山羊奶配方(GMF)是牛奶配方(CMF)的替代品,婴儿对其中一个的偏好尚未得到正式评估。具体来说,我们在这项研究中的目的是确定与传统的基于乳清的CMF相比,基于全脂牛奶的GMF的婴儿是否会遇到更少的喂养行为问题。(2)方法:这是一个多中心,双盲,在巴黎或附近的六个儿科医生办公室进行了双臂平行分配的随机对照试验,法国,2018年6月至2021年12月31日。总的来说,64名健康婴儿(≤4个月),主要是配方奶,被随机分配到基于全乳的GMF(n=33)或基于乳清的CMF(n=31)臂。父母完成了婴儿饮食行为问卷(BEBQ)和改良的QUALIN问卷,以评估婴儿喂养行为和生活质量(精神运动和社会情绪发展),分别,纳入时(牛奶分娩前1至5天)和最后一次就诊(牛奶分娩后第28±3天)。所有招募的患者均获得知情同意,伦理委员会批准了这项研究。(3)结果:从纳入到最终访问的BEBQ饮食享受和饮食缓慢量表得分的变化在两组之间没有差异。然而,食物反应性(GMF:0.15±1;CMF:-0.48±0.81;p=0.010)和一般食欲(GMF:0.26±1.2;CMF:-0.48±0.88;p=0.012)的子量表得分显着改善,和改良的QUALIN(GMF:4.6±9.4;CMF:-0.40±7.6;p=0.03)得分有利于GMF组。(4)结论:在这种双盲中,随机对照试验,GMF喂养的婴儿比CMF喂养的婴儿表现出更大的总体食欲,可能是由于这些公式组成的差异(即,蛋白质和脂质分布)。此外,GMF喂养的婴儿享有更好的生活质量。两组之间的食物享受没有差异。这些发现表明,基于全脂牛奶的GMF可能是基于乳清的CMF的有吸引力的替代品。临床试验注册:NCT03488758(clinicaltrials.gov)。
    (1) Background: While goat milk formula (GMF) is an alternative to cow milk formula (CMF), infants\' preferences for one over the other have not been formally assessed. Specifically, our aim in this study was to determine whether infants experience fewer feeding behavior problems with whole milk-based GMF than with conventional whey-based CMF. (2) Methods: This was a multicenter, double-blind, randomized controlled trial with two-arm parallel assignment conducted in six pediatricians\' offices in or near Paris, France, between June 2018 and 31 December 2021. Overall, 64 healthy infants (≤4 months old), predominantly formula-fed, were randomly assigned to either the whole milk-based GMF (n = 33) or whey-based CMF (n = 31) arm. Parents completed the Baby Eating Behavior Questionnaire (BEBQ) and the modified QUALIN questionnaire to evaluate infant feeding behavior and quality of life (psychomotor and socioemotional development), respectively, at inclusion (1 to 5 days before milk delivery) and the final visit (day 28 ± 3 after milk delivery). Informed consent was obtained for all recruited patients, and an ethical committee approved the study. (3) Results: Changes in BEBQ Enjoyment of Food and Slowness in Eating subscale scores from inclusion to final visit did not differ between arms. However, there were significant improvements in subscale scores for Food Responsiveness (GMF: 0.15 ± 1; CMF: -0.48 ± 0.81; p = 0.010) and General Appetite (GMF: 0.26 ± 1.2; CMF: -0.48 ± 0.88; p = 0.012), and modified QUALIN (GMF: 4.6 ± 9.4; CMF: -0.40 ± 7.6; p = 0.03) scores in favor of the GMF group. (4) Conclusions: In this double-blind, randomized controlled trial, GMF-fed infants exhibited a greater general appetite than CMF-fed infants, possibly due to differences in the composition of these formulas (i.e., protein and lipid profiles). In addition, GMF-fed infants enjoyed a better quality of life. There was no difference in food enjoyment between groups. These findings suggest that whole-milk-based GMF could be an attractive alternative to whey-based CMF. Clinical trial registration: NCT03488758 (clinicaltrials.gov).
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  • 文章类型: Journal Article
    背景:稳定的地磁场和不稳定的地磁活动与死亡率之间的相关性,发病率,和心血管疾病(CVD)的患病率仍然模棱两可。
    方法:为了研究全球地磁场(GMF)强度与地磁扰动(GMD)和CVD事件之间的相关性,长周期尺度,根据2019年全球疾病负担研究(GBD2019),纳入了全球和204个国家和地区。GMF强度数据,GMD频率,CVD事件,收集了1996年至2019年所包括地点的天气和卫生经济指标。进行线性回归和面板数据建模以确定GMF强度和CVD事件之间的相关性。还进行了多因素面板数据分析,以调整混杂因素的影响。
    结果:对于1996-2019年的平均数据,线性回归模型显示总GMF(tGMF)强度与总CVD死亡率之间存在一致的正相关关系[系数=0.009,(0.006,0.01195CI)],而水平GMF(hGMF)强度与心血管疾病总死亡率呈负相关[coef=-0.010(-0.013,-0.00795CI)].当考虑时间趋势时,面板数据分析仍显示tGMF与总CVD死亡率呈正相关[coef=0.009,(0.008,0.00995CI)]。同时,hGMF与总CVD死亡率呈负相关[coef=-0.008,(-0.009,-0.00795CI)]。当面板模型针对混杂因素进行调整时,tGMF之间没有发现相反的相关趋势,hGMF和CVD事件。在高收入地区,发现地磁风暴(GMS)频率与总CVD死亡率之间存在正相关[coef=14.007,(2.785,25.22995CI)],然而,随着纬度从极地到赤道的减少,这种积极趋势逐渐消失。
    结论:GMF的稳定和长期水平成分可能对心脏健康有益。称为GMD的不稳定和短期GMF可能会危害心脏健康。我们的结果表明,定期GMF在维持心脏健康状态中的重要性以及GMD对心脏健康的不利影响。
    The correlation between stable geomagnetic fields and unstable geomagnetic activities with mortality, incidence, and prevalence of cardiovascular diseases (CVDs) remains ambiguous.
    To investigate the correlations between geomagnetic field (GMF) intensity and geomagnetic disturbance (GMD) and CVDs events in global, long-period scale, global and 204 countries and territories were included on the base of 2019 Global Burden of Disease study (GBD 2019). Data of GMF intensity, GMD frequency, CVDs events, weather and health economic indicators from 1996 to 2019 of included locations were collected. Linear regression and panel data modelling were conducted to identify the correlations between GMF intensity and CVDs events, multi-factor panel data analysis was also generated to adjust the effect of confounding factors.
    For the average data during 1996-2019, linear regression model revealed consistent positive correlations between total GMF (tGMF) intensity and mortality of total CVDs [coef = 0.009, (0.006,0.011 95%CI)], whereas negative correlations were found between horizonal GMF (hGMF) intensity and total CVD mortality [coef = -0.010 (-0.013, -0.007 95%CI)]. When considering the time trend, panel data analysis still demonstrated positive correlation between tGMF and total CVDs mortality [coef = 0.009, (0.008,0.009 95%CI)]. Concurrently, the hGMF negatively correlated with total CVDs mortality [coef = -0.008, (-0.009, -0.007 95%CI)]. When the panel models were adjusted for confounding factors, no reverse of correlation tendency was found between tGMF, hGMF and CVDs events. In high-income territories, positive correlation was found between geomagnetic storm (GMS) frequency and mortality of total CVDs [coef = 14.007,(2.785, 25.229 95%CI)], however, this positive trend faded away gradually with the latitude decreasing from polar to equator.
    Stable and long-term horizontal component of GMF may be beneficial to cardiac health. Unstable and short-term GMF called GMD could be a hazard to cardiac health. Our results suggest the importance of regular GMF in maintaining cardio-health state and the adverse impacts of GMD on cardiac health.
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  • 文章类型: Journal Article
    阿尔茨海默病(AD)是一种无法治愈的疾病,进行性和毁灭性的神经退行性疾病。AD的发病机制与β淀粉样蛋白(Aβ)的聚集和积累有关,引发神经炎症和记忆障碍的主要神经毒性介质。最近,我们发现纤维素醚化合物(CEs)通过抑制蛋白的错误折叠和复制对朊病毒疾病有有益的作用,与Aβ共享其复制机制。CEs是FDA批准的食品和药品中的安全添加剂。在这里,我们首次使用体外和体内模型确定了代表性CE(TC-5RW)在AD中的治疗效果。我们的体外研究表明,TC-5RW抑制Aβ聚集,以及暴露于Aβ的人和鼠神经母细胞瘤细胞中的神经毒性和免疫反应性。在体内研究中,我们第一次观察到单次和每周一次的TC-5RW给药,分别,转基因5XFAD小鼠模型的记忆功能得到改善。我们进一步证明,TC-5RW治疗5XFAD小鼠显著抑制Aβ寡聚体和斑块负荷及其相关的神经炎症通过调节星形胶质细胞增生,小胶质细胞增生和促炎介质胶质细胞成熟因子β(GMFβ)。此外,我们确定TC-5RW在体外减少了脂多糖诱导的激活的神经胶质增生和GMFβ。总之,我们的结果表明,CEs对Aβ病理和认知障碍有治疗作用,直接,有效的抗炎活性挽救神经炎症。因此,这些FDA批准的化合物是开发治疗AD和与蛋白质错误折叠相关的相关神经退行性疾病的有效候选药物。
    Alzheimer\'s disease (AD) is an incurable, progressive and devastating neurodegenerative disease. Pathogenesis of AD is associated with the aggregation and accumulation of amyloid beta (Aβ), a major neurotoxic mediator that triggers neuroinflammation and memory impairment. Recently, we found that cellulose ether compounds (CEs) have beneficial effects against prion diseases by inhibiting protein misfolding and replication of prions, which share their replication mechanism with Aβ. CEs are FDA-approved safe additives in foods and pharmaceuticals. Herein, for the first time we determined the therapeutic effects of the representative CE (TC-5RW) in AD using in vitro and in vivo models. Our in vitro studies showed that TC-5RW inhibits Aβ aggregation, as well as neurotoxicity and immunoreactivity in Aβ-exposed human and murine neuroblastoma cells. In in vivo studies, for the first time we observed that single and weekly TC-5RW administration, respectively, improved memory functions of transgenic 5XFAD mouse model of AD. We further demonstrate that TC-5RW treatment of 5XFAD mice significantly inhibited Aβ oligomer and plaque burden and its associated neuroinflammation via regulating astrogliosis, microgliosis and proinflammatory mediator glial maturation factor beta (GMFβ). Additionally, we determined that TC-5RW reduced lipopolysaccharide-induced activated gliosis and GMFβ in vitro. In conclusion, our results demonstrate that CEs have therapeutic effects against Aβ pathologies and cognitive impairments, and direct, potent anti-inflammatory activity to rescue neuroinflammation. Therefore, these FDA-approved compounds are effective candidates for developing therapeutics for AD and related neurodegenerative diseases associated with protein misfolding.
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  • 文章类型: Meta-Analysis
    以羊奶为基础的婴儿配方奶粉(GMF)现在在几个国家有售,经当局批准。我们系统地评估了GMF与基于牛奶的配方(CMF)对婴儿生长和安全性参数的影响。MEDLINE,EMBASE,和CochraneLibrary数据库检索(2022年12月)的随机对照试验(RCTs).使用修订的Cochrane偏差风险工具(ROB-2)评估偏差风险。异质性通过I2量化。确定了四个RCT,涉及670名婴儿。所有试验都显示了对ROB-2的一些关注。此外,所有纳入的研究均由行业资助.与饲喂CMF的婴儿相比,那些饲喂GMF的人在性别和年龄调整后的体重z分数上显示出相似的增长(平均差异,MD,0.21[95%置信区间,CI,-0.16至0.58],I2=56%),长度(MD0.02,[95%CI-0.29至0.33],I2=24%),和头围(MD0.12,95%[CI-0.19至0.43],I2=2%)。各组的大便频率相似。由于粪便稠度报告的差异,不能得出确切的结论。两组的不良反应(严重或任何)相似。这些发现保证了GMF与CMF相比是安全且耐受性良好的。
    Goat-milk-based infant formulas (GMFs) are now available in several countries, having been approved by authorities. We systematically evaluated the effects of GMF compared with cow-milk-based formula (CMF) on infant growth and safety parameters. The MEDLINE, EMBASE, and Cochrane Library databases were searched (December 2022) for randomized controlled trials (RCTs). The risk of bias was assessed using the Revised Cochrane Risk-of-Bias tool (ROB-2). Heterogeneity was quantified by I2. Four RCTs involving a total of 670 infants were identified. All trials revealed some concern in ROB-2. Furthermore, all of the included studies were funded by the industry. Compared with infants fed CMF, those fed GMF showed similar growth in sex- and age-adjusted z-scores for weight (mean difference, MD, 0.21 [95% confidence interval, CI, -0.16 to 0.58], I2 = 56%), length (MD 0.02, [95% CI -0.29 to 0.33], I2 = 24%), and head circumference (MD 0.12, 95% [CI -0.19 to 0.43], I2 = 2%). Stool frequency was similar among the groups. Due to differences in the reporting of stool consistency, no firm conclusion can be drawn. Adverse effects (serious or any) were similar in both groups. These findings provide reassurance that GMFs compared with CMFs are safe and well tolerated.
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