MAPK, Mitogen-Activated Protein Kinase

MAPK,丝裂原活化蛋白激酶
  • 文章类型: Journal Article
    肺腺癌(LUAD)是最常见的肺癌,也是导致死亡的主要原因之一。先前的研究发现LUAD与醛脱氢酶2(ALDH2)之间存在联系,醛脱氢酶基因(ALDH)超家族成员。在这项研究中,我们通过分析表达水平确定了其他有用的早期LUAD识别和靶向LUAD治疗的预后标志物,表观遗传机制,以及LUAD患者ALDH2的信号活性。所获得的结果表明ALDH2基因和蛋白质表达在LUAD患者样品中显著下调。此外,美国癌症联合委员会(AJCC)报告说,在LUAD的不同阶段,ALDH2表达减少与总体生存率(OS)下降密切相关。相当大,ALDH2在LUAD癌症中显示异常的DNA甲基化状态。发现ALDH2在几种细胞生物学信号通路的蛋白质表达谱中下调,特别是干细胞相关途径。最后,报道了ALDH2活性与干细胞相关因子和免疫系统的关系。总之,ALDH2的下调,DNA异常甲基化,而随之而来的干性信号通路缺陷是LUAD的相关预后和治疗标志物。
    Lung adenocarcinoma (LUAD) is the most prevalent lung cancer and one of the leading causes of death. Previous research found a link between LUAD and Aldehyde Dehydrogenase 2 (ALDH2), a member of aldehyde dehydrogenase gene (ALDH) superfamily. In this study, we identified additional useful prognostic markers for early LUAD identification and targeting LUAD therapy by analyzing the expression level, epigenetic mechanism, and signaling activities of ALDH2 in LUAD patients. The obtained results demonstrated that ALDH2 gene and protein expression significantly downregulated in LUAD patient samples. Furthermore, The American Joint Committee on Cancer (AJCC) reported that diminished ALDH2 expression was closely linked to worse overall survival (OS) in different stages of LUAD. Considerably, ALDH2 showed aberrant DNA methylation status in LUAD cancer. ALDH2 was found to be downregulated in the proteomic expression profile of several cell biology signaling pathways, particularly stem cell-related pathways. Finally, the relationship of ALDH2 activity with stem cell-related factors and immune system were reported. In conclusion, the downregulation of ALDH2, abnormal DNA methylation, and the consequent deficit of stemness signaling pathways are relevant prognostic and therapeutic markers in LUAD.
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  • 文章类型: Journal Article
    未经证实:据报道,普伐他汀钠在脑动脉粥样硬化和神经元损伤中具有多种有益作用;然而,对脑静脉缺血的预防作用尚不清楚。在这里,我们旨在研究普伐他汀钠经口预先给药对大脑皮质静脉缺血并抑制细胞凋亡的神经保护作用。
    UNASSIGNED:将30只8周龄雄性Wistar大鼠平均分为两个研究组(n=15vs.n=15);普伐他汀组以其常规饮食喂养1%普伐他汀钠2周,而对照组只接受常规饮食。本研究采用两静脉闭塞(2VO)模型,每只动物的两个相邻的皮质静脉被玫瑰孟加拉染料光化学永久封闭。在光血栓形成期间,记录静脉缺血区域的脑血流量(CBF)的区域变化。2VO后48小时,使用灌注固定对动物实施安乐死,我们从组织学上测量了梗死面积与对侧半球的比率,并计数半影中的Bax和Bcl-2阳性细胞以研究其对细胞凋亡的意义。
    UNASSIGNED:普伐他汀组梗死面积比对照组明显降低(P<0.01)。普伐他汀组Bax阳性细胞数也显著减少(P<0.01)。相比之下,在两组的所有区域中,Bcl-2的免疫标记基本上为阴性。2VO后两组的区域CBF变化也没有显着差异(P=0.13)。
    UNASSIGNED:预先给予食物中混合的普伐他汀钠对大脑皮质静脉缺血具有神经保护作用,抑制与抑制Bax表达相关的细胞凋亡,但对局部CBF影响很小。
    UNASSIGNED: Pravastatin sodium is reported to have multiple beneficial effects in cerebral atherosclerosis and neuronal injury; however, the preventive effects on cerebral venous ischemia are still unknown. Herein, we aimed to examine the neuroprotective effects of transoral prior administration of pravastatin sodium against cerebral cortical venous ischemia with suppression of apoptosis.
    UNASSIGNED: Thirty 8-week-old male Wistar rats were divided equally into two study groups (n = 15 vs. n = 15); the pravastatin group was fed 1% pravastatin sodium with their usual diet for 2 weeks, while the control group only received the usual diet. Two-vein occlusion (2VO) model was applied for this study, and two adjacent cortical veins in each animal were permanently occluded photochemically with rose bengal dye. During photo-thrombosis, regional changes of the cerebral blood flow (CBF) in area of the venous ischemia were recorded. At 48-h after 2VO, animals were euthanized using perfusion fixation, and we histologically measured ratios of infarcted area to contralateral hemisphere, and counted Bax- and Bcl-2-positive cells in the penumbra to investigate the implications for apoptosis.
    UNASSIGNED: The ratio of infarcted area was significantly decreased in the pravastatin group compared to the control group (P < 0.01). The number of Bax-positive cells also decreased significantly in the pravastatin group (P < 0.01). In contrast, immunolabeling for Bcl-2 was essentially negative in all areas in both groups. There were also no significant differences in regional CBF changes after 2VO between the two groups (P = 0.13).
    UNASSIGNED: Pre-emptive administration of pravastatin sodium mixed in the food has neuroprotective effects against cerebral cortical venous ischemia with suppression of apoptosis associated with inhibition of Bax expression but has little influence on regional CBF.
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  • 文章类型: Journal Article
    头颈部鳞状细胞癌(HNSCC)的转录组分析对于理解HNSCC肿瘤的复杂生物学至关重要。MAPKAPK2或MK2是参与HNSCC进展的关键基因的mRNA转换的关键调节剂。然而,肿瘤的以MK2为中心的转录组概况尚不清楚。这项研究探讨了HNSCC与MK2在连接处的进展,以描绘肿瘤环境中MK2的生物学相关性和复杂的串扰。我们对HNSCC细胞和异种移植肿瘤进行了基于下一代测序的转录组分析,以确定MK2野生型和MK2敲低条件下的mRNA表达谱。使用基因表达测定验证了这些发现,免疫组织化学,和成绩单营业额研究。这里,我们通过注释和差异基因表达分析鉴定了一组关键的MK2调控候选基因.调节网络和途径富集揭示了它们在HNSCC发病机理中的重要性和参与。此外,基于3'-UTR的过滤识别了重要的MK2调节的下游靶基因,并通过nCounter基因表达测定对其进行了验证。最后,免疫组织化学和转录稳定性研究揭示了MK2在调节HNSCC中IGFBP2,MUC4和PRKAR2B的转录转换中的推定作用。最后,在这项研究中鉴定了MK2调节的候选基因,阐明了它们在HNSCC发病机制中的可能参与。这些基因具有作为HNSCC的诊断和治疗干预的目标的研究价值。
    Transcriptome analysis of head and neck squamous cell carcinoma (HNSCC) has been pivotal to comprehending the convoluted biology of HNSCC tumors. MAPKAPK2 or MK2 is a critical modulator of the mRNA turnover of crucial genes involved in HNSCC progression. However, MK2-centric transcriptome profiles of tumors are not well known. This study delves into HNSCC progression with MK2 at the nexus to delineate the biological relevance and intricate crosstalk of MK2 in the tumor milieu. We performed next-generation sequencing-based transcriptome profiling of HNSCC cells and xenograft tumors to ascertain mRNA expression profiles in MK2-wild type and MK2-knockdown conditions. The findings were validated using gene expression assays, immunohistochemistry, and transcript turnover studies. Here, we identified a pool of crucial MK2-regulated candidate genes by annotation and differential gene expression analyses. Regulatory network and pathway enrichment revealed their significance and involvement in the HNSCC pathogenesis. Additionally, 3\'-UTR-based filtering recognized important MK2-regulated downstream target genes and validated them by nCounter gene expression assays. Finally, immunohistochemistry and transcript stability studies revealed the putative role of MK2 in regulating the transcript turnover of IGFBP2, MUC4, and PRKAR2B in HNSCC. Conclusively, MK2-regulated candidate genes were identified in this study, and their plausible involvement in HNSCC pathogenesis was elucidated. These genes possess investigative values as targets for diagnosis and therapeutic interventions for HNSCC.
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  • 文章类型: Journal Article
    未经证实:牙周炎和骨质疏松症等疾病预计到2050年将大幅上升。骨形成和重塑是复杂的过程,在各种激素影响的各种疾病中受到干扰。
    UNASSIGNED:本研究旨在回顾和介绍调节颅面复合体骨重建的各种激素的作用。
    UNASSIGNED:在PubMed和GoogleScholar上进行了文献检索,以进行与激素和颌骨有关的研究。搜索策略包括以下术语的组合(“激素名称”+“牙科术语”):“激素”,“催产素”,“雌激素”,“脂联素”,“甲状旁腺激素”,“睾丸激素”,“胰岛素”,“血管紧张素”,\"皮质醇\",和“促红细胞生成素”,结合牙科术语“颌骨”,“牙槽骨”,“种植牙”,“下巴+骨骼再生,愈合或修复\,\"牙科\",“牙周炎”,“干插座”,“骨质疏松症”或“肺泡炎”。从2000年1月1日至2021年3月31日,根据纳入标准以英文筛选论文。出版物包括评论,书籍章节,和原创性研究论文;体外研究,体内动物,或者人类研究,包括临床研究,和荟萃分析。
    UNASSIGNED:骨形成和重塑是一个复杂的连续过程,涉及许多激素。拔牙和骨骼疾病后的骨量减少,如牙周炎和骨质疏松症,导致严重的问题,需要对过程有很好的理解。
    未经授权:激素一直与我们同在,塑造我们的发展并调节稳态。新发现的激素影响骨愈合的作用打开了使用激素作为治疗来对抗骨相关疾病的可能性。
    UNASSIGNED: Diseases such as periodontitis and osteoporosis are expected to rise tremendously by 2050. Bone formation and remodeling are complex processes that are disturbed in a variety of diseases influenced by various hormones.
    UNASSIGNED: This study aimed to review and present the roles of various hormones that regulate bone remodeling of the craniofacial complex.
    UNASSIGNED: A literature search was conducted on PubMed and Google Scholar for studies related to hormones and jawbone. Search strategies included the combinations (\"name of hormone\" + \"dental term\") of the following terms: \"hormones\", \"oxytocin\", \"estrogen\", \"adiponectin\", \"parathyroid hormone\", \"testosterone\", \"insulin\", \"angiotensin\", \"cortisol\", and \"erythropoietin\", combined with a dental term \"jaw bone\", \"alveolar bone\", \"dental implant\", \"jaw + bone regeneration, healing or repair\", \"dentistry\", \"periodontitis\", \"dry socket\", \"osteoporosis\" or \"alveolitis\". The papers were screened according to the inclusion criteria from January 1, 2000 to March 31, 2021 in English. Publications included reviews, book chapters, and original research papers; in vitro studies, in vivo animal, or human studies, including clinical studies, and meta-analyses.
    UNASSIGNED: Bone formation and remodeling is a complex continuous process involving many hormones. Bone volume reduction following tooth extractions and bone diseases, such as periodontitis and osteoporosis, cause serious problems and require a great understanding of the process.
    UNASSIGNED: Hormones are with us all the time, shape our development and regulate homeostasis. Newly discovered effects of hormones influencing bone healing open the possibilities of using hormones as therapeutics to combat bone-related diseases.
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  • 文章类型: Journal Article
    糖脂代谢紊乱是威胁人类健康和生命的主要因素。遗传,环境,心理,细胞,和分子因素有助于其发病机制。一些研究表明,神经内分泌轴功能障碍,胰岛素抵抗,氧化应激,慢性炎症反应,肠道菌群失调是与其相关的核心病理联系。然而,糖脂代谢紊乱的潜在分子机制和治疗靶点仍有待阐明。高通量技术的进展有助于阐明糖脂代谢紊乱的病理生理学。在本次审查中,我们探索了基因组学的方法和方法,转录组学,蛋白质组学,代谢组学,和肠道微生物可以帮助识别新的候选生物标志物,用于糖脂代谢紊乱的临床管理。我们还讨论了这些疾病的多组学研究的局限性和建议的未来研究方向。
    Glycolipid metabolism disorder are major threats to human health and life. Genetic, environmental, psychological, cellular, and molecular factors contribute to their pathogenesis. Several studies demonstrated that neuroendocrine axis dysfunction, insulin resistance, oxidative stress, chronic inflammatory response, and gut microbiota dysbiosis are core pathological links associated with it. However, the underlying molecular mechanisms and therapeutic targets of glycolipid metabolism disorder remain to be elucidated. Progress in high-throughput technologies has helped clarify the pathophysiology of glycolipid metabolism disorder. In the present review, we explored the ways and means by which genomics, transcriptomics, proteomics, metabolomics, and gut microbiomics could help identify novel candidate biomarkers for the clinical management of glycolipid metabolism disorder. We also discuss the limitations and recommended future research directions of multi-omics studies on these diseases.
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  • 文章类型: Journal Article
    有机磷酸酯(OPEs)广泛存在于各种环境介质中,并能破坏甲状腺内分泌信号通路。OPEs破坏甲状腺激素(TH)信号转导的机制尚不完全清楚。这里,我们提供了体内-体外-计算机证据,将OPEs作为环境THs竞争性地进入大脑,通过多种信号通路抑制斑马鱼的生长。OPEs可以结合转甲状腺素蛋白(TTR)和甲状腺素结合球蛋白,从而影响血液中TH的运输,并通过血脑屏障通过TTR到达大脑。当GH3细胞暴露于OPEs时,鉴于OPEs是TH的竞争性抑制剂,细胞增殖被显著抑制.甲酚二苯基磷酸酯被证明是TH的有效拮抗剂。慢性暴露于OPEs通过干扰甲状腺过氧化物酶和甲状腺球蛋白抑制TH合成,显著抑制斑马鱼的生长。基于基因表达调控与基因本体论和京都百科全书的基因和基因组数据库的比较,与甲状腺内分泌功能相关的信号通路,如受体-配体结合和调节激素水平,被确定为受到暴露于OPEs的影响。影响还与脂质的生物合成和代谢有关,和神经活性配体-受体相互作用。这些发现为OPEs破坏斑马鱼甲状腺通路的机制提供了全面的理解。
    Organophosphate esters (OPEs) are widespread in various environmental media, and can disrupt thyroid endocrine signaling pathways. Mechanisms by which OPEs disrupt thyroid hormone (TH) signal transduction are not fully understood. Here, we present in vivo-in vitro-in silico evidence establishing OPEs as environmental THs competitively entering the brain to inhibit growth of zebrafish via multiple signaling pathways. OPEs can bind to transthyretin (TTR) and thyroxine-binding globulin, thereby affecting the transport of TH in the blood, and to the brain by TTR through the blood-brain barrier. When GH3 cells were exposed to OPEs, cell proliferation was significantly inhibited given that OPEs are competitive inhibitors of TH. Cresyl diphenyl phosphate was shown to be an effective antagonist of TH. Chronic exposure to OPEs significantly inhibited the growth of zebrafish by interfering with thyroperoxidase and thyroglobulin to inhibit TH synthesis. Based on comparisons of modulations of gene expression with the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases, signaling pathways related to thyroid endocrine functions, such as receptor-ligand binding and regulation of hormone levels, were identified as being affected by exposure to OPEs. Effects were also associated with the biosynthesis and metabolism of lipids, and neuroactive ligand-receptor interactions. These findings provide a comprehensive understanding of the mechanisms by which OPEs disrupt thyroid pathways in zebrafish.
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  • 文章类型: Journal Article
    化学抗性以及由此产生的治疗失败在临床癌症治疗中是相当具有挑战性的。对化学抗性获得中的遗传变异的理解鼓励了使用基因调节方法来恢复抗癌药物的功效。许多智能纳米粒子被设计和优化以介导核酸和抗癌药物之间的组合治疗。这篇综述旨在定义这种共负载纳米载体的合理设计,目的是在各种细胞水平上逆转化学抗性,以改善抗癌治疗的治疗效果。通过治疗加载的原则,物理化学特性调整,和不同的纳米载体修饰,还研究了联合药物对化学敏感性恢复的有效性。到目前为止,这些新兴的纳米载体处于发展状态,但有望带来出色的成果。
    Chemoresistance and hence the consequent treatment failure is considerably challenging in clinical cancer therapeutics. The understanding of the genetic variations in chemoresistance acquisition encouraged the use of gene modulatory approaches to restore anti-cancer drug efficacy. Many smart nanoparticles are designed and optimized to mediate combinational therapy between nucleic acid and anti-cancer drugs. This review aims to define a rational design of such co-loaded nanocarriers with the aim of chemoresistance reversal at various cellular levels to improve the therapeutic outcome of anticancer treatment. Going through the principles of therapeutics loading, physicochemical characteristics tuning, and different nanocarrier modifications, also looking at combination effectiveness on chemosensitivity restoration. Up to now, these emerging nanocarriers are in development status but are expected to introduce outstanding outcomes.
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  • 文章类型: Journal Article
    未经证实:同步放化疗(CCRT)引起的口腔黏膜炎(OM)引起口腔疼痛,营养不良,头颈癌(HNC)患者的生活质量受损。植物化学物质在消除癌症治疗毒性中起着潜在的作用。
    UNASSIGNED:评估富含植物化学物质的蔬菜汁(VFJ)在预防局部晚期HNC患者中CCRT诱导的OM中的作用。
    UNASSIGNED:纳入49例接受CCRT的HNC患者。所有患者在CCRT前接受营养咨询,每周随访。VFJ组(25例)接受600mL/天的VFJ,在CCRT之前和CCRT期间,每周5天,持续两周,对照组(24例)没有。测定了VFJ中总多酚和类胡萝卜素的含量。人体测量学的变化,饮食,和实验室概况进行了比较。OM的评估基于世界卫生组织(WHO)评分系统。
    未经证实:总多酚含量为每100mLVFJ64.6mg没食子酸当量,类胡萝卜素主要为β-胡萝卜素和番茄红素。VFJ组的VFJ的平均每日消耗量为538mL。体重的变化,白蛋白,两组之间的能量摄入没有显着差异。在CCRT的第6周,VFJ(64.0%)的溃疡性OM发生率显着低于对照组(95.8%)。多重Logistic回归显示,VFJ消耗与溃疡性OM的风险降低显着相关。
    UNASSIGNED:食用富含植物化学物质(包括总多酚和类胡萝卜素)的VFJ可有效缓解局部晚期HNC患者中CCRT诱导的OM的严重程度。
    未经批准:预防医学;膳食治疗/营养补充剂。
    未经评估:(按EVISE分类)预防医学,饮食疗法,营养补充剂。
    UNASSIGNED: Concurrent chemoradiotherapy (CCRT)-induced oral mucositis (OM) causes oral pain, malnutrition, and impaired quality of life in patients with head and neck cancer (HNC). Phytochemicals play a potential role in eliminating cancer therapy toxicity.
    UNASSIGNED: To evaluate the effect of phytochemical-rich vegetable and fruit juice (VFJ) consumption in preventing CCRT-induced OM among patients with locally advanced HNC.
    UNASSIGNED: Forty-nine patients with HNC undergoing CCRT were enrolled. All patients received nutritional counseling before CCRT and weekly follow-up. The VFJ group (25 patients) received 600 mL/day VFJ, 5 days/week for two weeks preceding CCRT and during CCRT, and the control group (24 patients) did not. The contents of total polyphenols and carotenoids in the VFJ were determined. Changes in anthropometric, dietary, and laboratory profiles were compared. Assessment of OM was based on the World Health Organization (WHO) scoring system.
    UNASSIGNED: Total polyphenols content was 64.6 mg gallic acid equivalents per 100 mL of the VFJ, and the main carotenoids were β-carotene and lycopene. The mean daily consumption of the VFJ was 538 mL for VFJ group. Changes in body weight, albumin, and energy intake were not significantly different between the two groups. The incidence of ulcerative OM was significantly lower in VFJ (64.0%) than in control (95.8%) subjects at week 6 of CCRT. Multiple logistic regressions revealed that VFJ consumption correlated significantly with lower risks of ulcerative OM.
    UNASSIGNED: Consumption of VFJ rich in phytochemicals including total polyphenols and carotenoids effectively alleviates the severity of CCRT-induced OM among patients with locally advanced HNC.
    UNASSIGNED: Preventive Medicine; Dietary Therapy/Nutrition Supplements.
    UNASSIGNED: (classification by EVISE)Preventive medicine, dietary therapy, nutrition supplements.
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  • 文章类型: Journal Article
    瞬时受体电位(TRP)通道是钙(Ca2+)通透性通道的主要类型,这些相关的跨膜和细胞内TRP通道以前被认为主要与心血管和神经元系统的调节有关。如今,然而,越来越多的证据表明,这些TRP通道也负责肿瘤发生和发展,诱导肿瘤侵袭和转移。然而,TRP通道在恶性肿瘤中的总体潜在机制和可能的信号转导途径可能仍然难以捉摸.因此,在这次审查中,我们专注于TRP通道与肿瘤的显着特征之间的联系,例如多药耐药(MDR),转移,凋亡,扩散,逃避免疫监视,以及相关肿瘤微环境的改变。此外,我们还讨论了相关TRP通道在各种形式癌症中的表达和相关抑制剂的疗效。还介绍了各种作用机制的抗癌药物的化学敏感性和潜在的临床应用。此外,对于这种类型的钙通道的干预,提供可能的新的治疗方法来对抗恶性肿瘤将是有启发性的。
    Transient receptor potential (TRP) channels are one primary type of calcium (Ca2+) permeable channels, and those relevant transmembrane and intracellular TRP channels were previously thought to be mainly associated with the regulation of cardiovascular and neuronal systems. Nowadays, however, accumulating evidence shows that those TRP channels are also responsible for tumorigenesis and progression, inducing tumor invasion and metastasis. However, the overall underlying mechanisms and possible signaling transduction pathways that TRP channels in malignant tumors might still remain elusive. Therefore, in this review, we focus on the linkage between TRP channels and the significant characteristics of tumors such as multi-drug resistance (MDR), metastasis, apoptosis, proliferation, immune surveillance evasion, and the alterations of relevant tumor micro-environment. Moreover, we also have discussed the expression of relevant TRP channels in various forms of cancer and the relevant inhibitors\' efficacy. The chemo-sensitivity of the anti-cancer drugs of various acting mechanisms and the potential clinical applications are also presented. Furthermore, it would be enlightening to provide possible novel therapeutic approaches to counteract malignant tumors regarding the intervention of calcium channels of this type.
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  • 文章类型: Journal Article
    在老化的皮肤中,活性氧(ROS)诱导细胞外基质(ECM)的降解,导致明显的衰老迹象。ECM中的胶原被基质金属蛋白酶(MMP)裂解。丁香草醇(SYR),从人参浆果中分离,有各种生理活动,包括抗炎作用。然而,SYR通过抗氧化和自噬调节的抗衰老作用尚未阐明。
    在H2O2存在下在人HaCaT角质形成细胞中研究了SYR对皮肤老化的预防作用,并用SYR(0-200μg/mL)处理角质形成细胞。通过实时PCR和蛋白质印迹法测定MMP-2和-9的mRNA和蛋白水平,分别。通过2,2二苯基-1-吡啶酰肼(DPPH)和2,2'-氮杂-双-3-乙基苯并噻唑啉-6-磺酸(ABTS)测定法研究了自由基清除活性。通过Western印迹和共聚焦显微镜评估LC3B水平。
    SYR显著降低H2O2处理和未处理的HaCaT细胞中MMP-9和-2的基因表达和蛋白质水平。SYR未显示对HaCaT细胞的细胞毒性。SYR表现出DPPH和ABTS自由基清除活性,EC50值为10.77和10.35μg/mL,分别。SYR提高了H2O2刺激的HaCaT细胞中内源性和外源性LC3B的总水平。3-甲基腺嘌呤(3-MA),自噬抑制剂,SYR对MMP-2表达的抑制作用。
    SYR在H2O2刺激的HaCaT细胞中显示出抗氧化活性和上调的自噬活性,降低MMP-2和MMP-9的表达与皮肤老化有关。我们的结果表明,SYR具有作为预防皮肤老化的化妆品添加剂的潜在价值。
    UNASSIGNED: In aged skin, reactive oxygen species (ROS) induces degradation of the extracellular matrix (ECM), leading to visible aging signs. Collagens in the ECM are cleaved by matrix metalloproteinases (MMPs). Syringaresinol (SYR), isolated from Panax ginseng berry, has various physiological activities, including anti-inflammatory action. However, the anti-aging effects of SYR via antioxidant and autophagy regulation have not been elucidated.
    UNASSIGNED: The preventive effect of SYR on skin aging was investigated in human HaCaT keratinocytes in the presence of H2O2, and the keratinocyte cells were treated with SYR (0-200 μg/mL). mRNA and protein levels of MMP-2 and -9 were determined by real-time PCR and Western blotting, respectively. Radical scavenging activity was researched by 2,2 diphenyl-1-picrylhydrazyl (DPPH) and 2,2\'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assays. LC3B level was assessed by Western blotting and confocal microscopy.
    UNASSIGNED: SYR significantly reduced gene expression and protein levels of MMP-9 and -2 in both H2O2-treated and untreated HaCaT cells. SYR did not show cytotoxicity to HaCaT cells. SYR exhibited DPPH and ABTS radical scavenging activities with an EC50 value of 10.77 and 10.35 μg/mL, respectively. SYR elevated total levels of endogenous and exogenous LC3B in H2O2-stimulated HaCaT cells. 3-Methyladenine (3-MA), an autophagy inhibitor, counteracted the inhibitory effect of SYR on MMP-2 expression.
    UNASSIGNED: SYR showed antioxidant activity and up-regulated autophagy activity in H2O2-stimulated HaCaT cells, lowering the expression of MMP-2 and MMP-9 associated with skin aging. Our results suggest that SYR has potential value as a cosmetic additive for prevention of skin aging.
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