ACP

AcP
  • 文章类型: Journal Article
    环嘌呤核苷酸是跨越生命所有域的重要信号转导分子。3\',5'-环二磷酸腺苷(c-di-AMP)在原核生物和真核生物中均有作用,而调节细胞内c-di-AMP的信号和能够实现网络范围内稳态反应的分子机制仍然很大程度上未知。这里,我们提出的证据表明,乙酰磷酸(AcP)控制的网络负责c-di-AMP稳态通过两个不同的底物,二腺苷酸环化酶DNA完整性扫描蛋白(DisA)及其新发现的转录阻遏物,DasR.相应地,我们发现AcP诱导的乙酰化通过破坏蛋白质多聚化发挥这些调节作用,因此通过DisA的K66乙酰化损害c-di-AMP的合成。相反,在K78的DasR乙酰化过程中,disA的转录抑制得到缓解。这些发现确立了AcP作为平衡c-di-AMP稳态的介质的关键生理作用。进一步的研究表明,乙酰化的DisA和DasR经历构象变化,在分化中起关键作用。考虑到AcP诱导的乙酰化反应对环境胁迫的广泛分布,以及对已确定的关键地点的高度保护,我们认为,这种对c-di-AMP稳态的独特调节可能构成放线菌中央回路的基本特性,从而构成细胞生理学的整体控制。重要性由于c-di-AMP的鉴定是细菌生长和细胞生理学所必需的,一个主要挑战是进入c-di-AMP浓度决策过程的细胞信号和刺激,以及这些信息如何整合到调节途径中。以酵母菌为模型,我们确定二腺苷酸环化酶DisA的AcP依赖性乙酰化及其新鉴定的转录阻遏物DasR参与协调环境和细胞内信号,这对c-di-AMP稳态至关重要。具体来说,在K66乙酰化的DisA直接失活其二腺苷酸环化酶活性,因此,c-di-AMP的生产,而K78处的DasR乙酰化导致disA表达和c-di-AMP水平增加。因此,AcP代表c-di-AMP维持中必不可少的分子开关,应对环境变化,并可能阻碍有效发展。因此,AcP介导的翻译后过程构成了一个网络,超出了控制c-di-AMP稳态的通常且表征良好的合成酶/水解酶。
    Cyclic purine nucleotides are important signal transduction molecules across all domains of life. 3\',5\'-cyclic di-adenosine monophosphate (c-di-AMP) has roles in both prokaryotes and eukaryotes, while the signals that adjust intracellular c-di-AMP and the molecular machinery enabling a network-wide homeostatic response remain largely unknown. Here, we present evidence for an acetyl phosphate (AcP)-governed network responsible for c-di-AMP homeostasis through two distinct substrates, the diadenylate cyclase DNA integrity scanning protein (DisA) and its newly identified transcriptional repressor, DasR. Correspondingly, we found that AcP-induced acetylation exerts these regulatory actions by disrupting protein multimerization, thus impairing c-di-AMP synthesis via K66 acetylation of DisA. Conversely, the transcriptional inhibition of disA was relieved during DasR acetylation at K78. These findings establish a pivotal physiological role for AcP as a mediator to balance c-di-AMP homeostasis. Further studies revealed that acetylated DisA and DasR undergo conformational changes that play crucial roles in differentiation. Considering the broad distribution of AcP-induced acetylation in response to environmental stress, as well as the high conservation of the identified key sites, we propose that this unique regulation of c-di-AMP homeostasis may constitute a fundamental property of central circuits in Actinobacteria and thus the global control of cellular physiology.IMPORTANCESince the identification of c-di-AMP is required for bacterial growth and cellular physiology, a major challenge is the cell signals and stimuli that feed into the decision-making process of c-di-AMP concentration and how that information is integrated into the regulatory pathways. Using the bacterium Saccharopolyspora erythraea as a model, we established that AcP-dependent acetylation of the diadenylate cyclase DisA and its newly identified transcriptional repressor DasR is involved in coordinating environmental and intracellular signals, which are crucial for c-di-AMP homeostasis. Specifically, DisA acetylated at K66 directly inactivates its diadenylate cyclase activity, hence the production of c-di-AMP, whereas DasR acetylation at K78 leads to increased disA expression and c-di-AMP levels. Thus, AcP represents an essential molecular switch in c-di-AMP maintenance, responding to environmental changes and possibly hampering efficient development. Therefore, AcP-mediated posttranslational processes constitute a network beyond the usual and well-characterized synthetase/hydrolase governing c-di-AMP homeostasis.
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  • 文章类型: English Abstract
    福尔马林是病理学实验室的国际黄金标准固定剂。然而,考虑到其对个人和环境的有害影响,这并不是理想的选择。在不久的将来似乎不可能完全去除福尔马林或甚至取代福尔马林。在此更新中,我们提出了各种工具,允许将福尔马林的使用整合到生态养护方法中。其中,根据波尔多大学医院开发的方案,福尔马林回收易于实施,并提供快速和显着的结果,允许病理学专业人员实现法国2030年议程中包括的可持续发展目标。
    Formalin is the international gold-standard fixative in pathology laboratories. However it is not the ideal one considering its deleterious effects on individuals and the environment. Complete formalin removal or even substitution does not seem possible in the near future. In this update, we present various tools allowing to integrate the use of formalin into an ecocare approach. Among them, formalin recycling according to the protocol developed by the University Hospital of Bordeaux is simple to implement and delivers rapid and significant results, allowing pathology professionals to meet the sustainable development objectives included in the France 2030 agenda.
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  • 文章类型: Journal Article
    高级护理计划(ACP)是一个涉及患者表达其个人目标的过程,值,和未来的医疗保健偏好。数字应用可能有助于促进这一过程,尽管它们在老年人中的使用尚未得到充分研究。
    这项试点研究旨在评估覆盖范围,收养,以及KodaHealth的可用性,基于Web的面向患者的ACP平台,在老年人中。
    在北卡罗来纳州的学术医疗保健系统中拥有活跃的EpicMyChart帐户的老年人(50岁及以上)被招募参加。通过MyChart帐户发送了总共2850份电子邀请,并带有嵌入式超链接到Koda平台。同意参加的参与者被要求在通过KodaHealth平台导航之前和之后完成测试前和测试后的调查。主要结果是达到的,收养,和系统可用性量表(SUS)得分。探索性结果包括ACP知识和准备情况。
    共有161名参与者参加了研究并在平台上创建了一个帐户(年龄:平均63岁,SD9.3岁),这些参与者中有80%(129/161)继续完成干预的所有步骤,从而产生预先指令。参与者报告说,使用Koda平台的难度很小,整体SUS得分为76.2。此外,ACP知识(例如,在5分表上平均从3.2增加到4.2;P<.001)和准备(例如,在准备与卫生保健提供者讨论ACP时,平均从2.6增加到3.2;P<.001)从干预前后显着增加。
    这项研究表明,KodaHealth平台是可行的,具有高于平均水平的可用性,并改进了ACP对老年人偏好的记录。我们的研究结果表明,像Koda这样的基于网络的健康工具可以帮助老年人了解ACP并对其感到更舒适,同时有可能促进更多地参与护理计划。
    UNASSIGNED: Advance care planning (ACP) is a process that involves patients expressing their personal goals, values, and future medical care preferences. Digital applications may help facilitate this process, though their use in older adults has not been adequately studied.
    UNASSIGNED: This pilot study aimed to evaluate the reach, adoption, and usability of Koda Health, a web-based patient-facing ACP platform, among older adults.
    UNASSIGNED: Older adults (aged 50 years and older) who had an active Epic MyChart account at an academic health care system in North Carolina were recruited to participate. A total of 2850 electronic invitations were sent through MyChart accounts with an embedded hyperlink to the Koda platform. Participants who agreed to participate were asked to complete pre- and posttest surveys before and after navigating through the Koda Health platform. Primary outcomes were reach, adoption, and System Usability Scale (SUS) scores. Exploratory outcomes included ACP knowledge and readiness.
    UNASSIGNED: A total of 161 participants enrolled in the study and created an account on the platform (age: mean 63, SD 9.3 years), with 80% (129/161) of these participants going on to complete all steps of the intervention, thereby generating an advance directive. Participants reported minimal difficulty in using the Koda platform, with an overall SUS score of 76.2. Additionally, knowledge of ACP (eg, mean increase from 3.2 to 4.2 on 5-point scale; P<.001) and readiness (eg, mean increase from 2.6 to 3.2 on readiness to discuss ACP with health care provider; P<.001) significantly increased from before to after the intervention.
    UNASSIGNED: This study demonstrated that the Koda Health platform is feasible, had above-average usability, and improved ACP documentation of preferences in older adults. Our findings indicate that web-based health tools like Koda may help older individuals learn about and feel more comfortable with ACP while potentially facilitating greater engagement in care planning.
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  • 文章类型: Journal Article
    急性犬多发性神经根炎(ACP)是犬常见的周围神经病变,通常是自限性和良性的。电诊断(EDX)测试通常在7-10天后进行。延迟明确诊断可能会妨碍其他急性虚弱原因的治疗,这可能需要特定的治疗方法,并且可能具有不同的预后。这项回顾性多中心研究旨在评估在临床体征发作的前6天内进行的EDX是否可以检测到指示ACP的改变。并旨在表征最普遍的改变。对71只疑似ACP的犬进行回顾性分析,并根据EDX时机将其分为两组:早期组(EG,症状发作后1-6天)和晚期组(LG,症状发作后7-15天)。在我们的研究中,在运动神经传导研究(MNCSs)和F波分析中,两组之间没有发现显着差异。表明EDX即使在发病后的前6天也能表现出异常。尽管与EG相比,LG显示出明显更大程度的肌电图(EMG)改变,EG组仍观察到频繁的肌肉改变.这些发现支持在临床发病后的前6天内在疑似ACP患者中使用EDX。可以有效地对可疑ACP患者进行及时的神经生理检查,并有助于早期诊断并促进适当的治疗。
    Acute canine polyradiculoneuritis (ACP) is a common peripheral neuropathy in dogs, and is generally self-limiting and benign. Electrodiagnostic (EDX) tests are typically performed after 7-10 days. Delaying the definitive diagnosis may hamper the treatment of other causes of acute weakness, which may require specific treatments and may carry different prognoses. This retrospective multicenter study aims to assess whether EDX performed within the first 6 days of clinical signs onset can detect alterations indicative of ACP, and aims to characterize the most prevalent alterations. A total of 71 dogs with suspected ACP were retrospectively analyzed and classified into two groups based on EDX timing: early group (EG, 1-6 days after symptom onset) and late group (LG, 7-15 days after symptom onset). In our study, no significant differences were found between the two groups in motor nerve conduction studies (MNCSs) and F-wave analysis, indicating that EDX is able to demonstrate abnormalities even in the first 6 days from onset. Although the LG showed significantly greater degrees of electromyographic (EMG) alterations compared to the EG, frequent muscle alterations were still observed in the EG group. These findings support the use of EDX in patients with suspected ACP within the first 6 days from the clinical onset. Prompt neurophysiological examinations for suspected ACP patients can be performed effectively and can help allow for early diagnosis and facilitate appropriate treatment.
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  • 文章类型: Journal Article
    背景:研究证据表明,缺乏对姑息治疗和预先护理计划的参与可能归因于缺乏知识,公众中存在误解和污名。然而,死亡的重要性,死亡和丧亲被认为是实现姑息治疗的公共卫生方法的一个重要方面。因此,需要进行研究,以探讨公众对促进姑息治疗和预先护理计划的策略的看法。
    方法:探索性,定性设计,利用参与较大混合方法研究的参与者数据库中的有目的随机抽样。进行了在线半结构化访谈(n=28),并使用反身主题分析进行了分析。将主题发现映射到社会生态模型框架中,以全面了解与姑息治疗和提前护理计划参与有关的公共行为。
    结果:从数据中产生了三个主题:“可见性和相关性”;“将参与机会嵌入日常生活”;“公开讨论的社会和文化障碍”。跨主题确定了所有五个社会生态模型级别的相互作用的证据,建议采用多层次的公共卫生方法,包括个人,社会,有效的公众参与需要结构和文化方面。
    结论:公众对有效参与姑息治疗和预先护理计划服务的潜在策略的看法是多方面的。与会者建议提高公共领域的知名度是一个重要的考虑领域。此外,增加公众在日常生活中参与姑息治疗和预先护理计划的机会,比如学校内的教育,建议提高死亡素养并减少污名。为了有效的沟通,在制定与社会所有成员接触的战略时,需要探索社会文化方面。
    BACKGROUND: Research evidence suggests that a lack of engagement with palliative care and advance care planning could be attributed to a lack of knowledge, presence of misconceptions and stigma within the general public. However, the importance of how death, dying and bereavement are viewed and experienced has been highlighted as an important aspect in enabling public health approaches to palliative care. Therefore, research which explores the public views on strategies to facilitate engagement with palliative care and advance care planning is required.
    METHODS: Exploratory, qualitative design, utilising purposive random sampling from a database of participants involved in a larger mixed methods study. Online semi-structured interviews were conducted (n = 28) and analysed using reflexive thematic analysis. Thematic findings were mapped to the social-ecological model framework to provide a holistic understanding of public behaviours in relation to palliative care and advance care planning engagement.
    RESULTS: Three themes were generated from the data: \"Visibility and relatability\"; \"Embedding opportunities for engagement into everyday life\"; \"Societal and cultural barriers to open discussion\". Evidence of interaction across all five social ecological model levels was identified across the themes, suggesting a multi-level public health approach incorporating individual, social, structural and cultural aspects is required for effective public engagement.
    CONCLUSIONS: Public views around potential strategies for effective engagement in palliative care and advance care planning services were found to be multifaceted. Participants suggested an increase in visibility within the public domain to be a significant area of consideration. Additionally, enhancing opportunities for the public to engage in palliative care and advance care planning within everyday life, such as education within schools, is suggested to improve death literacy and reduce stigma. For effective communication, socio-cultural aspects need to be explored when developing strategies for engagement with all members of society.
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  • 文章类型: Journal Article
    这项研究的主要目的是根据已发表的文献记录自体条件血浆(ACP)治疗膝骨关节炎(OA)的临床结果。多个数据库(PubMed,Embase,WebofScience和Scopus)使用“膝盖OA”和干预“ACP”的术语搜索了至2024年1月4日以英文发表的文章。包括使用ACP治疗膝关节OA的所有临床研究。不是单独利用ACP的研究,即用作其他方式的辅助或不专注于膝关节OA的管理,被排除在外。五项研究,在临床实践中进行的3项随机对照试验(RCT)和2项现实世界上市后研究符合纳入/排除标准,被纳入本研究.所有研究均表明,各种患者报告的结局指标(PROMs)均有统计学上的显着改善,然而,在临床实践中进行的研究报告未实现最小临床重要差异(MCID).结果证明了ACP治疗膝关节OA的潜力,然而,在现实世界的临床环境中没有达到MCID.因此,有必要进行更充分的RCT和更长时间的随访以及现实世界的上市后研究,以建立长期疗效并证明常规临床使用合理,分别,膝关节OA患者的ACP。
    The primary objective of this study is to record the clinical outcomes of autologous conditioned plasma (ACP) for the treatment of knee osteoarthritis (OA) based on published literature. Multiple databases (PubMed, Embase, Web of Science and Scopus) were searched using terms for \"knee OA\" and the intervention \"ACP\" for articles published in English to January 4, 2024. All clinical studies using ACP for knee OA were included. Studies not utilizing ACP alone, i.e. used as an adjunct with other modalities or not focusing on the management of knee OA, were excluded. Five studies, three randomized controlled trials (RCTs) and two real-world post-market studies conducted in a clinical practice met the inclusion/exclusion criteria and were included in this study. All studies demonstrated statistically significant improvements in various patient-reported outcome measures (PROMs), however the studies performed in the clinical practice reported non-accomplishment of minimally clinically important difference (MCID). The results demonstrated the potential of ACP for management of knee OA, however the MCID was not achieved in real-world clinical settings. Thus, more adequately powered RCTs with longer follow-up as well as real-world post-market studies are warranted to establish long-term efficacy and justify routine clinical use, respectively, of ACP in patients suffering with knee OA.
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  • 文章类型: Journal Article
    黄龙病(HLB)是一种致命的柑橘病,目前正威胁着全世界的柑橘品种。一个推定的病原体,亚洲自由念珠菌(CLas),由Diaphorinacitri矢量,被称为亚洲柑橘木虱(ACP)。了解HLB病中CLas感染的细节受到其念珠菌性质以及在无症状阶段无法在患病树木中自信地检测到它的阻碍。为了确定柑橘代谢的早期变化,以响应使用其天然木虱载体接种CLas,Vinnous甜橙女士的叶子(柑橘(L.)Osbeck)将树木暴露于CLas阳性ACP或CLas阴性ACP,并使用转录组学(RNA测序)进行纵向分析,蛋白质组学(液相色谱-串联质谱;Dryad中提供的数据:10.25338/B83H1Z),和代谢组学(质子核磁共振)。在暴露于木虱(wpe)后4周,最初的HLB植物反应主要是对ACP的反应,在较小程度上,是否存在CLas。此外,对4、8、12和16wpe的分析确定了17种基因和一种蛋白质在暴露于CLas阳性ACP和CLas阴性ACP的叶片之间一致差异表达。这项研究为识别早期检测分子靶标提供了信息,并有助于更广泛地了解媒介传播的植物病原体相互作用。
    Huanglongbing (HLB) is a fatal citrus disease that is currently threatening citrus varieties worldwide. One putative causative agent, Candidatus Liberibacter asiaticus (CLas), is vectored by Diaphorina citri, known as the Asian citrus psyllid (ACP). Understanding the details of CLas infection in HLB disease has been hindered by its Candidatus nature and the inability to confidently detect it in diseased trees during the asymptomatic stage. To identify early changes in citrus metabolism in response to inoculation of CLas using its natural psyllid vector, leaves from Madam Vinous sweet orange (Citrus sinensis (L.) Osbeck) trees were exposed to CLas-positive ACP or CLas-negative ACP and longitudinally analyzed using transcriptomics (RNA sequencing), proteomics (liquid chromatography-tandem mass spectrometry; data available in Dryad: 10.25338/B83H1Z), and metabolomics (proton nuclear magnetic resonance). At 4 weeks postexposure (wpe) to psyllids, the initial HLB plant response was primarily to the ACP and, to a lesser extent, the presence or absence of CLas. Additionally, analysis of 4, 8, 12, and 16 wpe identified 17 genes and one protein as consistently differentially expressed between leaves exposed to CLas-positive ACP versus CLas-negative ACP. This study informs identification of early detection molecular targets and contributes to a broader understanding of vector-transmitted plant pathogen interactions.
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  • 文章类型: Journal Article
    医疗保健提供系统的变化改变了内科(IM)的实践方式,包括亚专科高级护理从业人员(ACP)作为医疗保健团队的重要成员。
    ACP在学术中心内提供临床设置和教育资源,以便能够识别和管理常见和复杂的传染病(ID)。IDACP将被赋予逐步责任,并期望在发展成为称职的从业者时实现里程碑。我们力求保证质量,成本效益高,以及在住院和门诊环境中以ID服务为中心的全面护理,符合国家标准和实践范围的建议和法规。
    认识到ACP的作用不断扩大,我们制定了ID亚专业的课程和指南.
    我们的提议极大地增加了ACP的可用文献,以提供完整的ID实践。
    UNASSIGNED: Changes in the health care delivery system have altered the way internal medicine (IM) is practiced, with inclusion of subspecialty advanced care practitioners (ACPs) as vital members of the health care team.
    UNASSIGNED: ACPs are provided the clinical settings and educational resources within an academic center to become competent in recognizing and managing common and complicated infectious diseases (ID). The ID ACP will be given progressive responsibility with expectations for achievement of milestones as they develop into competent practitioners. We seek to ensure quality, cost-effective, and comprehensive patient-centered care on the ID service in the inpatient and ambulatory settings in compliance with national standards and scope of practice recommendations and regulations.
    UNASSIGNED: In recognition of the expanding role of ACPs, we developed a curriculum and guidelines in the subspecialty of ID.
    UNASSIGNED: Our proposal greatly adds to the available literature for ACPs to provide the full spectrum of ID practice.
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  • 文章类型: Journal Article
    背景:预先护理计划(ACP)在医疗保健中变得越来越重要。一些人建议采用标准化的方法来启动所有老年人的ACP。然而,以患者为中心的医疗理念提出了更多针对老年人个体需求的细致入微的方法。这项研究调查了医疗保健专业人员如何以充分和最有益的方式对待对ACP有不同看法和需求的老年人。
    方法:我们使用问卷,采访,焦点小组和与老年人的非正式对话,住在自己的家里,自愿参加我们的研究.这项研究是参与性的,因为我们与实践合作伙伴密切合作,我们立即并不断地使用获得的发现来告知我们整个研究过程的后续步骤。
    结果:我们确定了对ACP相关活动有不同需求的老年人的三个亚组:第一组避免谈论他们对临终护理的需求和愿望。这些老年人从活动中受益,旨在激励他们关注ACP相关主题。第二组由老年人组成,他们原则上开放进行ACP对话,但自己不发起对话。这个小组要么信任他们的近亲或他们的医疗保健专业人员按照他们的意愿行事,要么不提出这个话题,以避免与相关的其他人面对可能不愉快的话题。这群人受益于有关ACP的信息以及启动ACP流程的医疗保健专业人员。第三组老年人自己发起ACP进程,收集信息,并为ACP采取必要的步骤。对于该小组,仍然有必要仔细检查他们是否确实采取了所有相关步骤,并与所有相关的护理机构和亲属共享信息。
    结论:我们提出了一个模型来简化ACP对个人需求的调整。我们建议的方法可能有助于增加老年人参与ACP对话的动机,如果这些对话与他们自己的需求更密切相关。Further,这也可能有助于简化医疗保健专业人员ACP流程的个人塑造,因为我们建议的模型为以不同方式接触不同类型的老年人提供了明确的指导.建议的方法将来可能会用于培训医疗保健专业人员进行ACP对话。
    BACKGROUND: Advance care planning (ACP) is becoming increasingly important in medical care. Some suggest standardized approaches to initiate ACP with all older adults. However, the idea of patient-centered care suggests more nuanced approaches tailored to individual older adults\' needs. This study investigated how older adults with different views and needs about ACP can be approached in an adequate and most beneficial way by health care professionals.
    METHODS: We used questionnaires, interviews, focus groups and informal conversations with older adults, living in their own homes, who volunteered to take part in our research. The research was participatory as we collaborated closely with practice partners and we used the obtained findings immediately and continuously to inform the next steps of our research throughout the process.
    RESULTS: We identified three subgroups of older adults with differential needs regarding ACP-related activities: The first group avoids talking about their needs and wishes for care towards the end of life. These older people benefit from activities, which aim at motivating them to concern themselves with ACP-related topics. The second group consists of older adults who are in principle open for ACP-conversations but do not initiate these themselves. This group either trusts their next-of-kin or their healthcare professional to act in accordance with their wishes or does not bring up the topic in order to avoid confronting relevant others with possibly unpleasant topics. This group of people benefits from information about ACP and from healthcare professionals initiating the ACP process. The third group of older people initiates the ACP process themselves, gathers information, and takes the necessary steps for ACP. With this group it remains relevant to check carefully whether they have indeed taken all relevant steps and shared the information with all relevant involved care institutions and relatives.
    CONCLUSIONS: We propose a model to simplify adjustments of ACP to individuals\' needs. Our suggested approach might contribute to increasing the motivation of older people to engage in ACP conversations if these are more closely related to their own needs. Further, it might also contribute to simplifying the individual shaping of the ACP process for healthcare professionals as our suggested model offers clear guidance for approaching different types of older people in different ways. The suggested approach may in future be used for training health care professionals in the conduct of ACP conversations.
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  • 文章类型: Journal Article
    受益于强大的协调属性,镧系金属离子已被用作竞争试剂来调节系统的荧光变化。然而,镧系金属离子作为纳米系统中聚集诱导发射增强的诱导剂是罕见的。在这里,我们报告了一种基于钐离子(Sm3)的竞争配位的“开关”荧光开关,用于级联检测酸性磷酸酶(ACP)和三磷酸腺苷(ATP)。已证实具有由谷胱甘肽(GSH)和甘氨酰甘氨酸(Gly-Gly)稳定的长波长发射(614nm)的新型铜纳米簇(CuNC)具有AIE性质。随着Sm3+诱导下GSH/Gly-GlyCuNCs的连续聚集,系统的荧光增加以实现“打开”过程。讨论了Sm3与GSH/Gly-GlyCuNC之间的协调行为。由于ATP具有很强的金属配位能力,与GSH/Gly-GlyCuNC协调的Sm3+竞争,导致系统的荧光“关闭”过程。作为ACP酶水解的底物,随着ACP对ATP的持续水解,Sm3+再次与GSH/Gly-GlyCuNC协调,这导致了AIE效应并实现了系统的荧光“开启”过程。该策略的结果是ATP线性范围为0.508~120.0μM,检出限为0.508μM(S/N=3),ACP线性范围为0.011~30.0U·L-1,检出限为0.011U·L-1(S/N=3)。对生物样品的应用是成功的。
    Benefit from the strong coordination property, lanthanide metal ions have been used as competitive reagents to modulate the fluorescence changes of the system. However, lanthanide metal ions as inducers for aggregation-induced emission enhancement in nanosystems is rare. Herein, we report a \"turn on-off-on\" fluorescent switch for cascade detection of acid phosphatase (ACP) and adenosine triphosphate (ATP) based on the competitive coordination of samarium ions (Sm3+). Novel copper nanoclusters (CuNCs) with long wavelength emission (614 nm) stabilized by glutathione (GSH) and glycylglycine (Gly-Gly) have been confirmed to have AIE property. With the continuous aggregation of GSH/Gly-Gly CuNCs under the induction of Sm3+, the fluorescence of the system increased to achieve the \"turn-on\" process. The coordinated behaviour between Sm3+ and GSH/Gly-Gly CuNCs is discussed. Due to the strong metal coordination ability of ATP, the Sm3+ coordinated with the GSH/Gly-Gly CuNCs is competed out, resulting in the fluorescence \"turn-off\" process of the system. As the substrate of enzymatic hydrolysis of ACP, with the continuous hydrolysis of ATP by ACP, Sm3+ coordinates with GSH/Gly-Gly CuNCs again, which leads to the AIE effect and realize the fluorescence \"turn-on\" process of the system. This strategy results in ATP linear range of 0.508 ~ 120.0 μM with a detection limit of 0.508 μM (S/N = 3) and ACP linear range of 0.011 ~ 30.0 U·L-1 with a detection limit of 0.011 U·L-1 (S/N = 3). Application to biologic samples was successful.
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