Biological factors

生物因素
  • 文章类型: Journal Article
    湿地土壤中的微生物群落对维持湿地生态系统的稳定至关重要。然而,湿地土壤微生物群落对环境胁迫敏感。这导致微生物群落结构可能受到环境因素的影响。为深入了解不同环境因子对湿地土壤微生物群落结构的响应,这篇综述全面探讨了自然条件的因素(例如,不同类型的湿地,土壤理化性质,气候条件),生物因素(例如,植物,土壤动物),和人类活动(例如,土地利用,土壤污染,放牧)。这些因素可以通过不同的方式影响湿地土壤中的微生物群落结构和活动,例如(i)影响土壤微生物存活的湿地土壤环境,(ii)影响可用营养素(例如,碳,氮)微生物活性所需,和(iii)对土壤微生物的直接影响(抗性物种的毒性或促进)。本综述可为湿地土壤微生物多样性的保护提供参考。维持湿地生态系统的平衡,和湿地生态恢复。
    Microbial community in wetland soils is crucial for maintaining the stability of the wetland ecosystem. Nevertheless, the soil microbial community is sensitive to the environmental stress in wetlands. This leads to the possibility that the microbial community structure may be influenced by environmental factors. To gain an in-depth understanding in the response of microbial community structure in wetland soils under different environmental factors, this review comprehensively explores the factors of natural conditions (e.g., different types of wetland, soil physical and chemical properties, climate conditions), biological factors (e.g., plants, soil animals), and human activities (e.g., land use, soil pollution, grazing). Those factors can affect microbial community structure and activities in wetland soils through different ways such as (i) affecting the wetland soil environment in which soil microorganisms survived in, (ii) influencing the available nutrients (e.g., carbon, nitrogen) required for microbial activity, and (iii) the direct effects on soil microorganisms (toxicity or promotion of resistant species). This review can provide references for the conservation of microbial diversity in wetland soils, the maintenance of wetland ecosystem balance, and the wetland ecological restoration.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    皮肤免疫相关不良事件包括一系列皮肤病学表现,包括苔藓样反应,牛皮癣状喷发,湿疹性皮炎,免疫性疾病,肉芽肿反应,瘙痒,白癜风,和严重的皮肤不良反应,如史蒂文斯-约翰逊综合征。治疗高级别或难治性皮肤免疫相关不良事件的常规方法涉及高剂量全身性皮质类固醇。然而,由于抗肿瘤反应的潜在破坏和相关并发症,它们的使用受到限制。为了解决这个问题,已经探索了保留皮质类固醇的靶向免疫调节剂作为治疗替代方案.生物制剂,通常用于非皮肤免疫相关的不良事件,如结肠炎,人们越来越认识到它们在治疗各种模式的皮肤免疫相关不良事件中的功效,包括psoriasiform,免疫球,和Stevens-Johnson综合征样反应.这篇评论巩固了英语文学的发现,强调生物制剂在管理各种皮肤免疫相关不良事件模式中的应用,还包括斑丘疹,湿疹,和苔藓样喷发,瘙痒,和短暂性棘皮松解性皮肤病(Grover病)。尽管这些药物的疗效已经确立,需要进一步的研究来探索它们对抗肿瘤反应的长期影响。
    Cutaneous immune-related adverse events encompass a spectrum of dermatological manifestations, including lichenoid reactions, psoriasiform eruptions, eczematous dermatitis, immunobullous disorders, granulomatous reactions, pruritus, vitiligo, and severe cutaneous adverse reactions such as Stevens-Johnson syndrome. The conventional approach to treating high-grade or refractory cutaneous immune-related adverse events has involved high-dose systemic corticosteroids. However, their use is limited owing to the potential disruption of antitumor responses and associated complications. To address this, corticosteroid-sparing targeted immunomodulators have been explored as therapeutic alternatives. Biologic agents, commonly employed for non-cutaneous immune-related adverse events such as colitis, are increasingly recognized for their efficacy in treating various patterns of cutaneous immune-related adverse events, including psoriasiform, immunobullous, and Stevens-Johnson syndrome-like reactions. This review consolidates findings from the English-language literature, highlighting the use of biologic agents in managing diverse cutaneous immune-related adverse event patterns, also encompassing maculopapular, eczematous, and lichenoid eruptions, pruritus, and transient acantholytic dermatosis (Grover disease). Despite the established efficacy of these agents, further research is necessary to explore their long-term effects on antitumor responses.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Case Reports
    背景:自体牙齿移植是指涉及在同一个体内重新定位牙齿的外科手术。在此过程中掺入富血小板纤维蛋白(PRF)具有改善愈合的潜力,加速复苏,优化治疗结果。
    方法:在本文中,作者通过两种情况说明了基于PRF的自体牙移植方法。这些病例概述了牙齿移植的手术步骤,并证明了PRF在促进软组织愈合中的潜在作用。此外,这篇文章提供了超过7年的长期随访的见解。
    结果:年轻人的牙齿移植是有希望的,但取决于诸如牙根发育阶段和供体牙齿大小匹配等因素。包括PRF可以改善愈合,至少在短期内,由于其丰富的生长因子和细胞因子的浓度,促进有效的组织再生。
    结论:自体牙移植已被证明是替代缺失牙列的可行治疗选择。将PRF添加到自体牙齿移植手术中可以加速并提高治疗效果。虽然这些案例的有利结果可能部分归因于PRF的使用,PRF对牙齿移植愈合过程的贡献仍然是推测性的,需要通过更多的研究进行验证.
    年轻患者无需根管治疗即可进行牙齿自体移植,同时也可能受益于富血小板纤维蛋白(PRF)的掺入。
    BACKGROUND: Autogenous tooth transplantation refers to a surgical procedure involving the relocation of a tooth within the same individual. Incorporating platelet-rich fibrin (PRF) in this procedure holds the potential to improve healing, accelerate recovery, and optimize treatment outcomes.
    METHODS: In this article, the authors illustrate a PRF-based approach for autogenous tooth transplantation through two case scenarios. These cases outline the surgical steps of tooth transplantation and demonstrate the potential role of PRF in enhancing soft tissue healing. Furthermore, the article provides insights from a long-term follow-up spanning over 7 years.
    RESULTS: Tooth transplantation in young adults is promising but depends on factors such as root development stage and donor tooth size matching. Including PRF may improve healing, at least in the short term, due to its rich concentration of growth factors and cytokines, promoting effective tissue regeneration.
    CONCLUSIONS: Autogenous tooth transplantation has shown to be a viable treatment option for replacing the missing dentition. Adding PRF to the autogenous tooth transplantation procedure may speed up and enhance the treatment outcome. While the favorable results of these cases might be partially attributed to the use of PRF, the contribution of PRF to the healing process of tooth transplant remains conjectural and requires validation through additional research.
    UNASSIGNED: Tooth autotransplantation can be performed in younger patients without requiring root canal treatment, while also potentially benefiting from the incorporation of platelet-rich fibrin (PRF).
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    铂(Pt)是耳蜗植入物等植入式神经假体中电极的首选金属,深层大脑刺激装置,和脑机接口技术。然而,众所周知,自20世纪70年代以来,Pt溶解伴随着电刺激而发生。最近的临床和体内研究已经显示外植电极阵列中的腐蚀迹象和组织样品中的含Pt颗粒的存在。金属离子和颗粒的降解和释放过程会显著影响器件性能。此外,铂溶解产物对组织健康和功能的影响仍在很大程度上未知。这是由于溶解过程背后的高度复杂的化学以及对生物响应的电和化学效应解耦的困难。了解铂溶解的机制和效果证明具有挑战性,因为溶解过程可能会受到电,化学,物理,和生物因素,所有这些都在实验设置之间高度可变。通过评估燃料电池领域报道的Pt溶解机制的综合发现,这篇综述对体外和体内神经刺激中驱动Pt溶解的可能机制进行了严格的分析。刺激参数,例如聚集电荷,电荷密度,和电化学电势都可以影响溶解的Pt的水平。然而,化学因素,如电解质类型,溶解气体,和pH都会影响溶解,将体外研究的结果与多个变量混淆。生物因素,如蛋白质,已被证明对溶解过程具有缓解作用。其他生物因素,如细胞和纤维增殖反应,如纤维化和胶质增生,对电极性能的影响,并怀疑对Pt溶解的影响。然而,刺激电极的电特性与Pt溶解之间的关系仍然存在争议。宿主对Pt降解产物的反应也是有争议的,这是由于所形成的Pt化合物的化学未知以及缺乏对临床情景中Pt分布的了解。通过电刺激产生的Pt的细胞毒性与基于Pt的化合物相似,包括六氯铂和化疗药物如顺铂。虽然在临床和急性刺激方案下产生的Pt水平通常比体外观察到的毒性浓度低一个数量级,需要进一步的研究来准确评估长期刺激过程中产生的Pt的质量平衡和类型及其对组织反应的影响。最后,综述了减轻溶解过程的方法。各种各样的方法,包括刺激策略,涂层电极材料,和表面改性技术,以避免刺激过程中的过量电荷和最小化组织反应,可能最终支持神经刺激装置的长期和安全运行。
    Platinum (Pt) is the metal of choice for electrodes in implantable neural prostheses like the cochlear implants, deep brain stimulating devices, and brain-computer interfacing technologies. However, it is well known since the 1970s that Pt dissolution occurs with electrical stimulation. More recent clinical and in vivo studies have shown signs of corrosion in explanted electrode arrays and the presence of Pt-containing particulates in tissue samples. The process of degradation and release of metallic ions and particles can significantly impact on device performance. Moreover, the effects of Pt dissolution products on tissue health and function are still largely unknown. This is due to the highly complex chemistry underlying the dissolution process and the difficulty in decoupling electrical and chemical effects on biological responses. Understanding the mechanisms and effects of Pt dissolution proves challenging as the dissolution process can be influenced by electrical, chemical, physical, and biological factors, all of them highly variable between experimental settings. By evaluating comprehensive findings on Pt dissolution mechanisms reported in the fuel cell field, this review presents a critical analysis of the possible mechanisms that drive Pt dissolution in neural stimulation in vitro and in vivo. Stimulation parameters, such as aggregate charge, charge density, and electrochemical potential can all impact the levels of dissolved Pt. However, chemical factors such as electrolyte types, dissolved gases, and pH can all influence dissolution, confounding the findings of in vitro studies with multiple variables. Biological factors, such as proteins, have been documented to exhibit a mitigating effect on the dissolution process. Other biological factors like cells and fibro-proliferative responses, such as fibrosis and gliosis, impact on electrode properties and are suspected to impact on Pt dissolution. However, the relationship between electrical properties of stimulating electrodes and Pt dissolution remains contentious. Host responses to Pt degradation products are also controversial due to the unknown chemistry of Pt compounds formed and the lack of understanding of Pt distribution in clinical scenarios. The cytotoxicity of Pt produced via electrical stimulation appears similar to Pt-based compounds, including hexachloroplatinates and chemotherapeutic agents like cisplatin. While the levels of Pt produced under clinical and acute stimulation regimes were typically an order of magnitude lower than toxic concentrations observed in vitro, further research is needed to accurately assess the mass balance and type of Pt produced during long-term stimulation and its impact on tissue response. Finally, approaches to mitigating the dissolution process are reviewed. A wide variety of approaches, including stimulation strategies, coating electrode materials, and surface modification techniques to avoid excess charge during stimulation and minimise tissue response, may ultimately support long-term and safe operation of neural stimulating devices.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    冠状病毒病(COVID-19)对个人生活方式有极其有害的影响,目前,人们必须经常在深刻的变化下做出财务或生存决策。尽管有报道称COVID-19改变了决策模式,潜在机制尚不清楚.这项小型审查的重点是COVID-19大流行对跨期选择的影响,和潜在的心理,生物,以及调解这种关系的社会因素。对WebofScience电子数据库的搜索产生了23项研究。结果显示,在COVID-19大流行下,人们倾向于选择即时和较小的奖励,变得不那么耐心了。特别是,有负面情绪的人,在身体健康状况更差的情况下,或者不遵守政府限制规则的人在行为上往往会变得更加“短视”。未来的研究应该检查更多的纵向和跨文化研究,以广泛了解COVID-19大流行下的决策变化。
    The coronavirus disease (COVID-19) has extremely harmful effects on individual lifestyles, and at present, people must make financial or survival decisions under the profound changes frequently. Although it has been reported that COVID-19 changed decision-making patterns, the underlying mechanisms remained unclear. This mini-review focuses on the impact of the COVID-19 pandemic on intertemporal choice, and potential psychological, biological, and social factors that mediate this relationship. A search of the Web of Science electronic database yielded 23 studies. The results showed that under the COVID-19 pandemic, people tended to choose immediate and smaller rewards, and became less patient. In particular, people with negative emotions, in a worse condition of physical health, or who did not comply with their government restriction rules tended to become more \"short-sighted\" in behavioral terms. Future studies should examine more longitudinal and cross-cultural research to give a broad view about the decision-making change under the COVID-19 pandemic.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Editorial
    暂无摘要。
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: English Abstract
    淀粉样原纤维的形成是蛋白质和肽的一般性质。它是一种类似于结晶的物理化学现象,其中超过溶解度的淀粉样蛋白前体蛋白通过过饱和的分解而沉淀。使用超声强制淀粉样蛋白原纤维诱导剂HANABI,我们发现血清白蛋白在透析相关淀粉样变性中具有抑制剂的作用.使用HANABI探索诱导或抑制淀粉样蛋白原纤维形成的因素可以导致淀粉样变性的早期诊断和预防方法的发展。
    Amyloid fibril formation is a general property of proteins and peptides. It is a physicochemical phenomenon similar to crystallization, in which amyloid precursor proteins exceeding solubility precipitate through the breakdown of supersaturation. Using the ultrasonication-forced amyloid fibril inducer HANABI, we have discovered that serum albumin acts as an inhibitor in dialysis-related amyloidosis. Exploring the factors that induce or inhibit amyloid fibril formation using HANABI can lead to the development of early diagnosis and prevention methods for amyloidosis.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:肠道菌群,对宿主健康至关重要,影响新陈代谢,免疫功能,和发展。了解肠道内细菌积累的动态过程至关重要,因为它与免疫反应密切相关,抗生素耐药性,还有结直肠癌.我们调查了大肠杆菌在斑马鱼幼虫肠道中的行为和分布,关注肠道微环境。
    结果:我们发现大肠杆菌在肠道褶皱中的传播受到了很大的抑制,导致褶皱中强烈的物理积累。此外,观察到背侧的大肠杆菌浓度高于腹侧。我们的体外微流控实验和理论分析表明,大肠杆菌在肠道中的总体分布是通过物理因素和细菌出租车的组合来确定的。
    结论:我们的研究结果为肠道微环境如何影响细菌运动和积累提供了有价值的见解,增强我们对肠道微生物群的行为和生态动力学的理解。
    BACKGROUND: The gut microbiota, vital for host health, influences metabolism, immune function, and development. Understanding the dynamic processes of bacterial accumulation within the gut is crucial, as it is closely related to immune responses, antibiotic resistance, and colorectal cancer. We investigated Escherichia coli behavior and distribution in zebrafish larval intestines, focusing on the gut microenvironment.
    RESULTS: We discovered that E. coli spread was considerably suppressed within the intestinal folds, leading to a strong physical accumulation in the folds. Moreover, a higher concentration of E. coli on the dorsal side than on the ventral side was observed. Our in vitro microfluidic experiments and theoretical analysis revealed that the overall distribution of E. coli in the intestines was established by a combination of physical factor and bacterial taxis.
    CONCLUSIONS: Our findings provide valuable insight into how the intestinal microenvironment affects bacterial motility and accumulation, enhancing our understanding of the behavioral and ecological dynamics of the intestinal microbiota.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    目的:研究疾病活动性和抗风湿药(DMARDs)治疗对类风湿性关节炎和间质性肺病(RA-ILD)患者全因死亡率的影响。
    方法:RA-ILD患者选自生物制剂注册类风湿性关节炎:生物治疗观察(RABBIT)。使用时变Cox回归,研究了临床指标与死亡率之间的关系.通过(1)考虑累积暴露的Cox回归分析了DMARDs的影响(即,治疗月除以总月)和(2)时变Cox回归作为主要方法(每月水平的治疗暴露)。
    结果:在15566名参与者中,381例被确定为RA-ILD病例,观察人数为1258人-年,中位随访时间为2.6年。97例患者(25.5%)死亡,其中34例(35.1%)在死亡时未接受DMARD治疗。较高的炎症生物标志物,但不肿胀和压痛关节计数与死亡率显着相关。与肿瘤坏死因子抑制剂(TNFi)相比,非TNFi生物DMARDs(bDMARDs)在死亡率低于1时显示校正HR(aHRs),无统计学意义.这一发现在各种灵敏度分析中是稳定的。非TNFi生物制剂和JAKI与TNFi的联合aHR为0.56(95%CI0.33至0.97)。与接受任何DMARD治疗相比,未接受DMARD治疗的死亡风险高两倍。AHR2.03(95%CI1.23至3.35)。
    结论:炎症生物标志物和缺乏DMARD治疗与RA-ILD患者死亡风险增加相关。非TNFibDMARDs可在RA-ILD患者中赋予增强的治疗益处。
    OBJECTIVE: To investigate the impact of disease activity and treatment with disease-modifying antirheumatic drugs (DMARDs) on all-cause mortality in patients with rheumatoid arthritis and prevalent interstitial lung disease (RA-ILD).
    METHODS: Patients with RA-ILD were selected from the biologics register Rheumatoid Arthritis: Observation of Biologic Therapy (RABBIT). Using time-varying Cox regression, the association between clinical measures and mortality was investigated. The impact of DMARDs was analysed by (1) Cox regression considering cumulative exposure (ie, treatment months divided by total months) and (2) time-varying Cox regression as main approach (treatment exposures at monthly level).
    RESULTS: Out of 15 566 participants, 381 were identified as RA-ILD cases with 1258 person-years of observation and 2.6 years median length of follow-up. Ninety-seven patients (25.5%) died and 34 (35.1%) of these were not receiving DMARD therapy at the time of death. Higher inflammatory biomarkers but not swollen and tender joint count were significantly associated with mortality. Compared with tumour necrosis factor inhibitors (TNFi), non-TNFi biologic DMARDs (bDMARDs) exhibited adjusted HRs (aHRs) for mortality below 1, lacking statistical significance. This finding was stable in various sensitivity analyses. Joint aHR for non-TNFi biologics and JAKi versus TNFi was 0.56 (95% CI 0.33 to 0.97). Receiving no DMARD treatment was associated with a twofold higher mortality risk compared with receiving any DMARD treatment, aHR 2.03 (95% CI 1.23 to 3.35).
    CONCLUSIONS: Inflammatory biomarkers and absence of DMARD treatment were associated with increased risk of mortality in patients with RA-ILD. Non-TNFi bDMARDs may confer enhanced therapeutic benefits in patients with RA-ILD.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:法国指南建议根据相关产品特征摘要(SmPC),在受孕前3-24周停止银屑病的生物治疗。这项研究的目的是评估皮肤科医生在治疗先前用生物制剂治疗的牛皮癣孕妇中的现实生活实践。我们希望评估从业者对相关SmPC的依从性水平。
    方法:我们与GRPso和Resopso合作进行了一项研究。从业人员完成了计算机化的问卷。我们进行了描述性统计,并研究了从业者的概况,他们对怀孕期间继续使用生物制剂的信心水平,以及他们报告的在怀孕期间使用生物制剂的做法。使用XLSTAT进行统计分析。小于0.05的P值被认为是显著的。
    结果:共有63名皮肤科医生(女性:71%;平均年龄43.8岁)参加了这项研究,其中大多数是医院(87%)。36.5%的从业人员遵循了建议,而44%的人报告说在诊断妊娠时停止使用生物制剂,20.5%的人报告在怀孕期间使用这些药物。在有十多年经验的皮肤科医生中,19%的人报告在SmPC之后。在患者基础>200的皮肤科医生中(接受牛皮癣生物制剂治疗的患者),19%的人在SmPC之后报告,而54%的从业者少于50名患者。SmPC之后的皮肤科医生的平均年龄是41岁,而不是对于那些不遵循SmPC的人来说,这是47年。
    结论:大多数医生在患者计划妊娠前不遵循停用生物制剂的建议。
    BACKGROUND: French guidelines recommend stopping biologic treatment of psoriasis between 3 and 24 weeks before conception in accordance with the relevant Summary of Product Characteristics (SmPC). The aim of this study was to evaluate the real-life practice of dermatologists in the management of pregnant women with psoriasis previously treated with biologic agents. We wished to assess the level of practitioner adherence to the relevant SmPCs.
    METHODS: We conducted a study in collaboration with GRPso and Resopso. A computerized questionnaire was completed by the practitioners. We performed descriptive statistics and studied the profile of the practitioners, their level of confidence with continuation of biological agents during pregnancy, and their reported practices on the use of biological agents in pregnancy. Statistical analyses were performed using XLSTAT. A p-value of less than 0.05 was considered significant.
    RESULTS: A total of 63 dermatologists (women: 71%; mean age 43.8 years) participated in this study, the majority of whom were hospital-based (87%). Recommendations were followed by 36.5% of practitioners, while 44% reported discontinuing biologic agents on diagnosis of pregnancy, and 20.5% reported using these agents during pregnancy. Among dermatologists with more than ten years of experience, 19% reported following the SmPC. Among dermatologists with a patient base >200 (patients treated with biologic agents for psoriasis), 19% reported following the SmPC compared to 54% of practitioners with less than 50 patients. The mean age of dermatologists following the SmPC was 41 years vs. 47 years for those not following the SmPC.
    CONCLUSIONS: The majority of practitioners do not follow recommendations on discontinuation of biologic agents before the planning of pregnancy by patients.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

公众号