combination

组合
  • 文章类型: Journal Article
    背景:已经进行了广泛的研究来预测抗精神病药的治疗反应(TR)。大多数研究针对抗精神病药的TR一般和单一疗法,然而,目前尚不清楚患者是否会对抗精神病药物的组合产生良好的反应。
    目的:本研究旨在确定氨磺必利或奥氮平单药治疗与抗精神病药物联合治疗的TR差异预测因子。
    方法:对从COMBINE研究中收集的数据进行了事后分析,双盲,随机化,对照试验。在基线处收集人口统计学和疾病相关测量值以预测8周后的TR,所述TR由阳性和阴性综合征量表定义。通过随机替换程序来解释缺失的值。分析损耗效应和多重共线性,并计算不同治疗组的逻辑回归模型集。
    结果:在321名随机患者中,直到第8周的201个完成的程序和197个被包括在分析中。对于所有治疗组,2周后的早期TR和基线时抗精神病药组的高主观幸福感是TR的可靠预测因子.早期副作用的倾向也表明后期无反应的风险较高。治疗组之间的具体参数估计值相当相似。
    结论:早期TR,与药物相关的主观幸福感,早期副作用倾向演变为后期TR的预测因子,无论是单一疗法还是联合疗法。因此,由于缺乏不同的预测因子,早期和密切监测有针对性的和不必要的影响,以指导各自的治疗决策.
    BACKGROUND: Extensive research has been undertaken to predict treatment response (TR) to antipsychotics. Most studies address TR to antipsychotics in general and as monotherapy, however, it is unknown whether patients might respond favourably to a combination of antipsychotics.
    OBJECTIVE: This study aimed to identify differential predictors for TR to monotherapy with amisulpride or olanzapine compared to a combination of antipsychotics.
    METHODS: Post-hoc analysis was conducted of data collected from the COMBINE-study, a double-blind, randomized, controlled trial. Demographic and disease-related measures were gathered at baseline to predict TR after eight weeks defined by the Positive and Negative Syndrome Scale. Missing values were accounted for by a random replacement procedure. Attrition effects and multicollinearity were analysed and sets of logistic regression models were calculated for different treatment groups.
    RESULTS: Of the 321 randomized patients, 201 completed procedures until week eight and 197 were included in the analyses. For all treatment groups, early TR after two weeks and high subjective well-being under antipsychotics at baseline were robust predictors for TR. The propensity for early side effects also indicated a higher risk of later non-response. Specific parameter estimates were rather similar between treatment groups.
    CONCLUSIONS: Early TR, drug-related subjective well-being, and early side effect propensity evolved as predictors for later TR whether to monotherapy or combination strategy. Accordingly, due to a lack of differential predictors, early and close monitoring of targeted and unwanted effects is indicated to guide respective treatment decisions.
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  • 文章类型: Journal Article
    背景:迄今为止,疾病缓解抗风湿药(DMARDs)被广泛用作类风湿性关节炎(RA)患者的主要一线治疗选择,甲氨蝶呤(MTX)和来氟米特(LEF;MTX+LEF)疗效优于单药MTX治疗,但MTX+LEF的协同机制尚不清楚。
    方法:首先,我们通过网络药理学和分子对接探讨了MTX+LEF在RA中的作用机制。维恩图分析揭示了MTX+LEF-RA和STRING的97个重叠基因靶标,随着Cytoscape插件MOCDE和cytoHubba;和GO富集分析显示,97个协同靶标的功能与123个分子功能(MF)有关,63个单元组件(CC),和1068个生物过程(BP)。Cytoscape插件ClueGO表明,这些靶标在52个术语的KEGG途径中富集,而9个关键基因主要参与雌激素的信号通路,拉斯,Rap1,PI3K-Akt,relaxin,TNF,AMPK,福克斯,催乳素,IL-17和粘附体连接。最后,CETSA和DARTS验证了MTX或LEF与所选靶蛋白EGFR的直接结合,PPARG,RAW264.7细胞中的MMP9和SRC。
    结果:我们从7个数据库中确定了292个MTX目标和247个LEF目标。此外,通过合并来自7个数据库的1,925个靶标和从5个GEO数据库中提取的正常对照和RA患者之间的999个差异表达基因(DEGs),确定了2,814个潜在的RA靶标。九个关键基因,ESR1,ALB,CASP3,EGFR,HSP90AA1,SRC,MMP9、PPARG、和IGF1进行了鉴定。分子对接证实MTX和LEF都与除ESR1和IGF1以外的9种关键蛋白中的大多数强烈结合。
    结论:这些结果有助于我们了解MTX联合LEF的增强机制,为临床治疗RA提供有针对性的依据。
    BACKGROUND: To date, disease-modifying antirheumatic drugs (DMARDs) are widely used as the primary first-line treatment option for patients with rheumatoid arthritis (RA), and the curative effect of methotrexate (MTX) and leflunomide (LEF; MTX + LEF) is greater than that of single-agent MTX therapy, but the synergistic mechanism of MTX + LEF is unclear.
    METHODS: First, we explored the mechanism of action of MTX + LEF in RA through network pharmacology and molecular docking. Venn diagram analysis revealed 97 overlapping gene targets of MTX + LEF-RA and STRING, along with Cytoscape plug-in MOCDE and cytoHubba; and GO enrichment analysis revealed that the functions of 97 synergistic targets were related to 123 molecular functions (MF), 63 cell components (CC), and 1,068 biological processes (BP). The Cytoscape plug-in ClueGO demonstrated that these targets were enriched in KEGG pathways of 52 terms, whereas 9 pivotal genes were mainly involved in the signaling pathways of estrogen, Ras, Rap1, PI3K-Akt, relaxin, TNF, AMPK, FoxO, prolactin, IL-17, and adherens junction. Finally, CETSA and DARTS validated the direct binding of MTX or LEF to the selected target proteins EGFR, PPARG, MMP9, and SRC in RAW264.7 cells.
    RESULTS: We identified 292 MTX targets and 247 LEF targets from 7 databases. Furthermore, 2,814 potential targets of RA were identified by merging 1,925 targets from 7 databases and 999 differentially expressed genes (DEGs) between normal controls and patients with RA extracted from 5 GEO databases. Nine pivotal genes, ESR1, ALB, CASP3, EGFR, HSP90AA1, SRC, MMP9, PPARG, and IGF1, were identified. Molecular docking verified that both MTX and LEF strongly bind to most of the 9 pivotal proteins except ESR1 and IGF1.
    CONCLUSIONS: These results contribute to our understanding of the enhancement mechanism of MTX combined with LEF and provide a targeted basis for the clinical treatment of RA.
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  • 文章类型: Journal Article
    全球,大多数国家正在积极制定战略,以应对与不受管制和无法控制的发展有关的挑战,环境质量的下降和宝贵的农业用地的枯竭。这导致人们越来越重视了解土地利用和土地覆盖。为了确定更好的土地利用政策,立法者和规划者需要了解农业和城市土地的当前分布,以及它们比例变化的信息。我们的方法结合了以四个主要主题为中心的数据——地质学,坡度,水文网络和土地利用-为了在Tamlouka盆地的目标农业研究区域中利用分类器的互补性,阿尔及利亚。Landsat8OLI-TIR多光谱图像和航天飞机雷达地形任务(SRTM-1arcv3)被实验用于分类和数字高程模型(DEM)分析。通过将决策树分类的结果与验证样本进行比较来确认分类的准确性。来自不同方法的几种分类图的组合结果表明,Tamlouka冲积平原,面积为19,300公顷,平均坡度小于2°,通过水文网络排出围绕它的高架浮雕。平原占流域总面积的37%,超过60%用于作物种植,不管当时农业轮作的休耕土地面积。坡度已被确定为决定研究区域土地利用方式的关键因素。该结果可用于预期流域管理。
    Worldwide, the majority of countries are actively devising strategies to address the challenges associated with unregulated and unmanageable development, the decline in environmental quality and the depletion of valuable agricultural land. This has led to a growing emphasis on understanding land use and land cover. In order to determine a better land use policy, legislators and planners need to know the current distribution of agricultural and urban lands, as well as information about changes in their proportions. Our approach combines data centred on main four themes-geology, slope gradient, hydrographic network and land use-in order to exploit classifier complementarities in our targeted agricultural study area of Tamlouka Basin, Algeria. Landsat 8 OLI-TIRs multispectral imagery and Shuttle Radar Topography Mission (SRTM-1arc v3) were used experimentally for classification and Digital Elevation Model (DEM) analysis. The classification\'s accuracy is confirmed by comparing the results of the decision tree classification with the validation samples. Results of the combination of several maps of classifications from the different methods show that the Tamlouka alluvial plain, having an area of 19,300 ha and an average slope gradient of less than 2°, drains the elevated reliefs that surround it via hydrographic network. The plain occupies 37% of the total basin area, with over of 60% being used for crop cultivation, regardless of fallow land areas in agricultural rotation at that time. The slope has been identified as a crucial factor determining land use patterns in the study area. This result can be used in prospective watershed management.
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  • 文章类型: Journal Article
    目的:在溃疡性结肠炎(UC)中,对维多珠单抗与继续噻嘌呤治疗的影响尚不清楚。我们的目的是确定噻嘌呤戒断对缓解期UC患者维多珠单抗的影响。
    方法:这项多中心随机对照试验招募了UC患者,每8周静脉注射维多珠单抗300mg和硫嘌呤。无类固醇临床缓解≥6个月且内镜下缓解/改善(Mayo内镜下评分[MES]≤1)的患者以2:1的比例随机分配退出或继续接受硫嘌呤。主要结果是比较第48周的维多珠单抗谷浓度。次要结果为临床复发(部分Mayo评分≥3,粪便钙卫蛋白>150μg/g或MES较基线增加≥1),粪便钙卫蛋白缓解(<150μg/g),C反应蛋白缓解(<5mg/L),中央阅读内镜缓解(MES=0),组织学缓解(南希指数=0),组织内镜缓解和不良事件。
    结果:总计,62例患者被随机分为继续(n=20)或撤回(n=42)硫嘌呤。在第48周,维多珠单抗谷浓度在继续组和停药组之间没有显着差异(分别为14.7μg/mL[IQR:12.3-18.5μg/mL]与15.9μg/mL[IQR:10.1-22.7μg/mL],P=0.36)。继续组的粪便钙卫蛋白缓解率明显高于对照组(95.0%[19/20]和71.4%[30/42],P=0.03),组织学缓解(80.0%[16/20]对48.6%[18/37],P=0.02)和组织内镜缓解(75.0%[15/20]对32.4%[12/37],P=0.002)比戒断组。组织学活性(HR:15.5[95CI:1.6-146.5],P=0.02)和先前的抗TNF暴露(HR:6.5[95CI:1.3-33.8],P=0.03)预测噻嘌呤戒断后的临床复发。
    结论:停用硫嘌呤并不影响维多珠单抗谷浓度。然而,它可能会增加粪便钙卫蛋白,组织学和组织内镜活动。组织学活性和先前的抗TNF暴露可能预测使用维多珠单抗治疗UC的患者停用硫嘌呤后的疾病复发;澳大利亚和新西兰试验注册,编号ACTRN12618000812291。
    OBJECTIVE: The impact of thiopurine de-escalation while on vedolizumab versus continuing thiopurine therapy in ulcerative colitis (UC) is unclear. We aimed to determine the effect of thiopurine withdrawal for patients with UC in remission on vedolizumab.
    METHODS: This multicenter randomized controlled trial recruited UC patients on vedolizumab 300 mg intravenously every 8 weeks and a thiopurine. Patients in steroid-free clinical remission for ≥6 months and endoscopic remission/improvement (Mayo endoscopic subscore ≤1) were randomized 2:1 to withdraw or continue thiopurine. Primary outcome was comparing week 48 vedolizumab trough concentrations. Secondary outcomes were clinical relapse (partial Mayo score ≥3 and fecal calprotectin >150 μg/g or increase in Mayo endoscopic subscore ≥1 from baseline), fecal calprotectin remission (<150 μg/g), C-reactive protein remission (<5 mg/L), centrally read endoscopic remission (Mayo endoscopic subscore = 0), histologic remission (Nancy index = 0), histo-endoscopic remission, and adverse events.
    RESULTS: In total, 62 patients were randomized to continue (n = 20) or withdraw (n = 42) thiopurine. At week 48, vedolizumab trough concentrations were not significantly different between continue and withdrawal groups (14.7 μg/mL, interquartile rate [IQR], 12.3-18.5 μg/mL versus 15.9 μg/mL, IQR, 10.1-22.7 μg/mL, respectively, P = 0.36). The continue group had significantly higher fecal calprotectin remission (95.0%, 19/20 versus 71.4%, 30/42; P = .03), histologic remission (80.0%, 16/20 versus 48.6%, 18/37; P = .02), and histo-endoscopic remission (75.0%, 15/20 versus 32.4%, 12/37; P = .002) than the withdrawal group. Histologic activity (hazard ratio [HR], 15.5; 95% confidence interval [CI], 1.6-146.5; P = .02) and prior anti-tumor necrosis factor exposure (HR, 6.5; 95% CI, 1.3-33.8; P = .03) predicted clinical relapse after thiopurine withdrawal.
    CONCLUSIONS: Thiopurine withdrawal did not affect vedolizumab trough concentrations. However, it may increase fecal calprotectin, histologic, and histo-endoscopic activity. Histologic activity and prior anti-tumor necrosis factor exposure may predict disease relapse on thiopurine withdrawal for patients using vedolizumab for UC. Australian and New Zealand Trial Registry, number ACTRN12618000812291.
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  • 文章类型: Journal Article
    背景:血浆淀粉样β(Aβ),磷酸化tau-181(p-tau181),神经丝光(NfL)和神经胶质纤维酸性蛋白(GFAP)可能有助于神经退行性痴呆的诊断。我们的目标是在不同的生物标志物及其组合之间进行综合比较,这是缺乏的,在由阿尔茨海默病(AD)组成的多中心中国痴呆队列中,额颞叶痴呆(FTD),和进行性核上性麻痹(PSP)。
    方法:我们招募了92名痴呆患者[64名AD,16FTD,和12PSP与痴呆]和20健康对照(HC)。他们的血浆Αβ,p-tau181,NFL,和GFAP通过高度敏感的单分子免疫测定法检测。通过脑脊液或/和淀粉样蛋白正电子发射断层扫描测量患者的Αβ病理。
    结果:与HC相比,痴呆患者的所有血浆生物标志物均发生了显着改变,特别是Aβ42/Aβ40和NfL在区分AD和HC方面表现出显著的性能。血浆Aβ42/Aβ40,p-tau181,NfL,GFAP可以很好地将FTD或PSP与HC区分开,并且能够区分AD和非AD(FTD/PSP)。
    结论:我们的结果证实了单个血浆生物标志物Aβ42/Aβ40,p-tau181,NfL,和中国痴呆患者的GFAP,并指出这些生物标志物的组合可能更准确地识别FTD/PSP患者和区分AD和非AD痴呆。
    BACKGROUND: Plasma amyloid-β (Aβ), phosphorylated tau-181 (p-tau181), neurofilament light (NfL) and glial fibrillary acidic protein (GFAP) potentially aid in the diagnosis of neurodegenerative dementias. We aim to conduct a comprehensive comparison between different biomarkers and their combination, which is lacking, in a multicenter Chinese dementia cohort consisting of Alzheimer\'s disease (AD), frontotemporal dementia (FTD), and progressive supranuclear palsy (PSP).
    METHODS: We enrolled 92 demented patients [64 AD, 16 FTD, and 12 PSP with dementia] and 20 healthy controls (HC). Their plasma Αβ, p-tau181, NfL, and GFAP were detected by highly sensitive-single molecule immunoassays. Αβ pathology in patients was measured by cerebrospinal fluid or/and amyloid positron emission tomography.
    RESULTS: All plasma biomarkers tested were significantly altered in dementia patients compared with HC, especially Aβ42/Aβ40 and NfL showed significant performance in distinguishing AD from HC. A combination of plasma Aβ42/Aβ40, p-tau181, NfL, and GFAP could discriminate FTD or PSP well from HC and was able to distinguish AD and non-AD (FTD/PSP).
    CONCLUSIONS: Our results confirmed the diagnostic performance of individual plasma biomarkers Aβ42/Aβ40, p-tau181, NfL, and GFAP in Chinese dementia patients and noted that a combination of these biomarkers may be more accurate in identifying FTD/PSP patients and distinguishing AD from non-AD dementia.
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  • 文章类型: Journal Article
    介绍联合抗真菌治疗方案经常用于治疗免疫功能低下患者的侵袭性真菌感染。特别是癌症和移植患者。特比萘芬是联合治疗方案的潜在药物。方法我们回顾了六年期间的数据,从死亡率和病原体分布方面检查了患者的预后。我们研究的患者总数为64。评估了在联合治疗中使用特比萘芬与不使用特比萘芬的情况。在分析的64名患者中,只有14人接受了特比萘芬。计算两组的死亡率,和人口统计学进行描述性统计分析。结果两组患者的死亡率无统计学差异。特比萘芬的加入具有良好的耐受性,并且似乎没有导致任何不适当的毒性问题。讨论我们希望在我们的医疗设备中引起更多的关注,以用于侵袭性真菌感染。据我们所知,我们研究中的患者总数,虽然小,代表迄今为止文献中报告的最大队列。获得真菌病原体的敏感性至关重要,因为这可能会破坏特比萘芬在我们研究中的效用,其多药耐药镰刀菌的数量超过预期。病人数量有限,多中心试验将有利于进一步检查特比萘芬的联合用药方案.
    Introduction Combination antifungal regimens are frequently employed in the treatment of invasive fungal infections in patients who are immunocompromised, particularly for cancer and transplant patients. Terbinafine is a potential agent of interest for combination regimens. Methods We reviewed data over a six-year period examining patient outcomes in terms of both mortality and distribution of pathogens. The total number of patients in our study was 64. The use of terbinafine versus no terbinafine in combination therapy was assessed. Of the 64 patients analyzed, only 14 received terbinafine. Mortality was calculated for both groups, and demographics were analyzed by descriptive statistics. Results There was no statistical difference in mortality outcomes in either group. The addition of terbinafine was well tolerated and did not appear to result in any undue toxicity concerns. Discussion We wish to draw greater attention to this potential agent within our armamentarium for invasive fungal infections. To our knowledge, the total number of patients in our study, while small, represents the largest reported cohort in the literature to date. Sensitivities are crucial to be obtained for fungal pathogens as this likely undermined the utility of terbinafine in our study with larger than expected numbers of multidrug-resistant Fusarium. With limited patient numbers, a multicenter trial would be beneficial to further examine terbinafine in combination regimens.
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  • 文章类型: Journal Article
    冠状病毒病(COVID-19)大流行继续威胁全球公共卫生。Remdesivir和单克隆抗体已显示出有望治疗免疫功能低下的患者的COVID-19,包括那些癌症患者,移植接受者,和那些患有自身免疫性疾病的人。然而,这种联合治疗对免疫抑制患者的有效性和安全性尚不清楚.我们比较了联合治疗和瑞德西韦单药治疗轻中度COVID-19免疫抑制患者的疗效和安全性。分析了2021年7月至2023年3月接受治疗的86名患者。与单一治疗组(MTG)相比,联合治疗组(CTG)显示病毒载量的统计学显著降低(p<0.01)。CTG中的患者也比MTG中的患者经历了更早的发烧消退(p=0.02),尽管这种差异在多变量分析中并不显著(p=0.21)。此外,CTG在第7、14和28天的放电率明显高于MTG(分别为p<0.01,p<0.01和p=0.04)。联合治疗未观察到严重不良事件。这些结果表明,联合治疗可以通过降低病毒载量和加快康复来改善免疫抑制COVID-19患者的临床结局。需要进一步的研究才能充分了解这种联合治疗对免疫受损的COVID-19患者的益处。
    The coronavirus disease (COVID-19) pandemic continues to threaten global public health. Remdesivir and monoclonal antibodies have shown promise for COVID-19 treatment of patients who are immunocompromised, including those with cancer, transplant recipients, and those with autoimmune disorder. However, the effectiveness and safety of this combination therapy for patients who are immunosuppressed remain unclear. We compared the efficacy and safety of combination therapy and remdesivir monotherapy for patients with mild-to-moderate COVID-19 who were immunosuppressed. Eighty-six patients treated in July 2021-March 2023 were analyzed. The combination therapy group (CTG) showed a statistically significant reduction in viral load compared with the monotherapy group (MTG) (p < 0.01). Patients in the CTG also experienced earlier resolution of fever than those in the MTG (p = 0.02), although this difference was not significant in the multivariate analysis (p = 0.21). Additionally, the CTG had significantly higher discharge rates on days 7, 14, and 28 than the MTG (p < 0.01, p < 0.01, and p = 0.04, respectively). No serious adverse events were observed with combination therapy. These findings suggest that combination therapy may improve the clinical outcomes of immunosuppressed COVID-19 patients by reducing the viral load and hastening recovery. Further studies are required to fully understand the benefits of this combination therapy for immunocompromised COVID-19 patients.
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  • 文章类型: Journal Article
    缺乏研究低强度他汀类药物与依泽替米贝的组合是否可以降低需要他汀类药物治疗的患者患糖尿病的风险的研究。因此,我们旨在评估联合治疗对预防非糖尿病患者糖化血红蛋白(HbA1c)升高的效果.68例患者以1:1的比例随机分配,接受低强度瑞舒伐他汀(5mg/天)和依泽替米贝(10mg/天)或高强度瑞舒伐他汀(20mg/天)的联合治疗。主要终点是12周时HbA1c水平的绝对差异。与基线相比,HbA1c水平在12周时显示出0.11%的总体升高(平均值±标准偏差:5.78±0.3%,95%置信区间[CI]:5.86-6.07,p=0.044)。在12周时,两组之间的HbA1c水平没有差异(最小均方差异:0.001,95%CI:0.164-0.16,p=0.999)。我们的研究发现,在没有糖尿病的患者中,低强度瑞舒伐他汀和依泽替米贝的组合与单独使用高强度瑞舒伐他汀相比,HbA1c水平没有显著差异。这表明低强度瑞舒伐他汀和依泽替米贝的组合可能不是预防需要他汀类药物的无糖尿病患者HbA1c升高的有效策略。
    There is a dearth of studies investigating whether the combination of low-intensity statins with ezetimibe can reduce the risk of diabetes in patients requiring statin therapy. Therefore, we aimed to evaluate the effects of combination therapy on the prevention of glycated hemoglobin (HbA1c) elevation in patients without diabetes. Sixty-eight patients were randomly assigned in a 1:1 ratio to receive a combination of low-intensity rosuvastatin (5 mg/day) and ezetimibe (10 mg/day) or high-intensity rosuvastatin (20 mg/day). The primary endpoint was the absolute difference in the HbA1c levels at 12 weeks. The HbA1c level showed an overall elevation of 0.11% at 12 weeks compared to that at baseline (mean ± standard deviation: 5.78 ± 0.3%, 95% confidence interval [CI]: 5.86-6.07, p = 0.044). The HbA1c levels did not differ between the groups at 12 weeks (least square mean difference: 0.001, 95% CI: 0.164-0.16, p = 0.999). Our study found that the combination of low-intensity rosuvastatin and ezetimibe did not yield significant differences in HbA1c levels compared to high-intensity rosuvastatin alone after 12 weeks in patients without diabetes. This suggests that the combination of low-intensity rosuvastatin and ezetimibe may not be an effective strategy for preventing HbA1c elevation in patients without diabetes requiring statins.
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  • 文章类型: Journal Article
    肝纤维化是肝损伤后细胞外基质过度沉积引起的慢性肝损害,导致肝组织纤维性瘢痕。肝纤维化的进展部分受到肠道微生物群的影响。基于“肠-肝轴”理论,壳聚糖可以通过调节肠道菌群在肝纤维化中发挥治疗作用。丹酚酸B可以通过抑制肝星状细胞的活化和减少细胞外基质的产生来抑制肝纤维化的发展。在这项研究中,在小鼠肝纤维化模型中研究壳聚糖联合丹酚酸B对肝纤维化的治疗作用。结果表明,壳聚糖与丹酚酸B联用效果优于单用药物,提高AST/ALT水平,降低α-SAM的表达,COLI,IL-6等相关基因。它改善了肠道微生物群的结构,增加了有益细菌如乳酸菌的丰度。以上结果可为肝纤维化的临床治疗提供新思路。
    Liver fibrosis is a chronic liver lesion caused by excessive deposition of the extracellular matrix after liver damage, resulting in fibrous scarring of liver tissue. The progression of liver fibrosis is partially influenced by the gut microbiota. Chitosan can play a therapeutic role in liver fibrosis by regulating the gut microbiota based on the \'gut-liver axis\' theory. Salvianolic acid B can inhibit the development of liver fibrosis by inhibiting the activation of hepatic stellate cells and reducing the production of extracellular matrix. In this study, the therapeutic effect of chitosan in combination with salvianolic acid B on liver fibrosis was investigated in a mouse liver fibrosis model. The results showed that the combination of chitosan and salvianolic acid B was better than the drug alone, improving AST/ALT levels and reducing the expression of α-SAM, COL I, IL-6 and other related genes. It improved the structure of gut microbiota and increased the abundance of beneficial bacteria such as Lactobacillus. The above results could provide new ideas for the clinical treatment of liver fibrosis.
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  • 文章类型: Journal Article
    由于其多样化和独特的物理性质,miktoarm星形共聚物(μ-SCP)引起了极大的关注。在我们的研究中,我们使用α-单溴异丁酰基封端的聚二甲基硅氧烷(PDMS-Br)在0°C下在4-乙烯基苄醇(VBA)的存在下进行苯乙烯辅助的原子转移自由基偶联(SAATRC)。通过实现高耦合效率(χc=0.95),我们用苄醇获得了中链官能化的PDMS-VBAm-PDMS聚合物。有趣的是,基质辅助激光解吸/电离飞行时间质谱(MALDI-TOFMS)分析显示仅插入了两种VBA偶联剂(m=2)。随后,PDMS-VBA2-PDMS产品使用ε-己内酯(ε-CL)通过开环聚合(ROP)在40°C下用有效的有机催化剂进行中链延伸,导致合成新型(PDMS)2-μ-(PCL)2μ-SCP。最终,获得了新型(PDMS)2-μ-(PCL)2μ-SCP。通过小角度X射线散射(SAXS)实验,进一步对获得的PDMS-μ-PCLμ-SCP进行固态自组装检查。值得注意的是,各种纳米结构,包括薄片和六角形包装的圆柱体,观察到具有约15nm的周期性尺寸。因此,我们成功开发了一种简单有效的反应组合()策略(即,SAATRC--ROP)用于合成定义明确的PDMS-μ-PCLμ-SCP。这种方法可以为从硅氧烷基材料制造纳米结构开辟新的可能性。
    Due to their diverse and unique physical properties, miktoarm star copolymers (μ-SCPs) have garnered significant attention. In our study, we employed α-monobomoisobutyryl-terminated polydimethylsiloxane (PDMS-Br) to carry out styrenics-assisted atom transfer radical coupling (SA ATRC) in the presence of 4-vinylbenzyl alcohol (VBA) at 0 °C. By achieving high coupling efficiency (χc = 0.95), we obtained mid-chain functionalized PDMS-VBAm-PDMS polymers with benzylic alcohols. Interestingly, matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) analysis revealed the insertion of only two VBA coupling agents (m = 2). Subsequently, the PDMS-VBA2-PDMS products underwent mid-chain extensions using ε-caprolactone (ε-CL) through ring-opening polymerization (ROP) with an efficient organo-catalyst at 40 °C, resulting in the synthesis of novel (PDMS)2-μ-(PCL)2 μ-SCPs. Eventually, novel (PDMS)2-μ-(PCL)2 μ-SCPs were obtained. The obtained PDMS-μ-PCL μ-SCPs were further subjected to examination of their solid-state self-assembly through small-angle X-ray scattering (SAXS) experiments. Notably, various nanostructures, including lamellae and hexagonally packed cylinders, were observed with a periodic size of approximately 15 nm. As a result, we successfully developed a simple and effective reaction combination (Є) strategy (i.e., SA ATRC-Є-ROP) for the synthesis of well-defined PDMS-μ-PCL μ-SCPs. This approach may open up new possibilities for fabricating nanostructures from siloxane-based materials.
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