mobile applications

移动应用程序
  • 文章类型: Journal Article
    本文在现实的驾驶模拟器环境中评估了DARSTrafficPlus移动应用程序,以评估其对驾驶安全和用户体验的影响,特别关注合作智能运输系统(C-ITS)。这项研究是在更广泛的背景下进行的,即在车辆环境中集成移动技术,以通过实时告知驾驶员潜在危险来增强道路安全性。采用了多种实验方法,包括标准化的用户体验问卷(meCUE2.0),在驾驶模拟器中测量定量驾驶参数和眼睛跟踪数据,和实验后的采访。结果表明,移动应用程序显着改善了驾驶员的安全感知,特别是当收到关于危险地点的通知时。在移动屏幕顶部显示的带有听觉提示的通知被认为是最有效的。该研究得出的结论是,像DARSTrafficPlus这样的移动应用程序可以通过有效地向驾驶员传达危险,在增强道路安全方面发挥关键作用,从而潜在地减少道路交通事故并提高整体交通安全。屏幕观看保持在安全阈值以下,确认该应用程序在不分心地提供关键信息方面的功效。这些发现支持将C-ITS功能集成到移动应用程序中,以增强较旧的车辆技术并将安全优势扩展到更广泛的用户群。
    The paper evaluates the DARS Traffic Plus mobile application within a realistic driving simulator environment to assess its impact on driving safety and user experience, particularly focusing on the Cooperative Intelligent Transport Systems (C-ITS). The study is positioned within the broader context of integrating mobile technology in vehicular environments to enhance road safety by informing drivers about potential hazards in real time. A combination of experimental methods was employed, including a standardised user experience questionnaire (meCUE 2.0), measuring quantitative driving parameters and eye-tracking data within a driving simulator, and post-experiment interviews. The results indicate that the mobile application significantly improved drivers\' safety perception, particularly when notifications about hazardous locations were received. Notifications displayed at the top of the mobile screen with auditory cues were deemed most effective. The study concludes that mobile applications like DARS Traffic Plus can play a crucial role in enhancing road safety by effectively communicating hazards to drivers, thereby potentially reducing road accidents and improving overall traffic safety. Screen viewing was kept below the safety threshold, affirming the app\'s efficacy in delivering crucial information without distraction. These findings support the integration of C-ITS functionalities into mobile applications as a means to augment older vehicle technologies and extend the safety benefits to a broader user base.
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  • 文章类型: Journal Article
    背景:患者驱动的医疗保健创新是一种新兴现象,对慢性病患者有益,例如囊性纤维化(CF)。然而,以前的研究还没有从提供者的角度研究什么可能促进或阻碍这些创新的实施。
    目的:本研究的目的是解释CF诊所采用患者驱动创新的差异。
    方法:对采用患者控制的应用程序进行了多案例比较研究,以支持与医疗保健专业人员(HCP)的自我管理和合作。数据收集和分析以不采用为指导,放弃,传播,扩大规模,以及可持续性和复杂性评估工具(NASSS-CAT)框架。数据包括患者的用户活动水平和对9家诊所工作人员的定性访谈(n=8,88.9%,在瑞典;n=1,11.1%,在美国)。我们计算了每个诊所活跃用户的最大和平均百分比,并进行了统计过程控制(SPC)分析,以探索用户活动水平如何随时间变化。对定性数据进行内容分析和复杂性分析,并用于生成流程图。然后在交叉案例分析中对所有数据进行三角测量。
    结果:我们没有发现未采用或明确放弃该应用程序的证据。根据每个诊所的最大最终用户活动,可以识别不同的创新采用模式。我们标记为低(16%-23%),中等(25%-47%),或高采用率(58%-95%)。SPC图表表明,引入新的应用程序功能和与研究相关的活动对用户活动水平产生了积极影响。采用率的变化与提供者对护理过程复杂性的看法有关。价值主张的更高感知复杂性,采用者系统,和组织与较低的采用率有关。在早期采用创新的诊所或依赖冠军的诊所,用户活动趋于平稳或下降,表明对可持续性的负面影响。
    结论:为了在医疗保健中采用和维持患者驱动的创新,了解患者与提供者的相互依赖关系和提供者对产生价值的观点是至关重要的。
    BACKGROUND: Patient-driven innovation in health care is an emerging phenomenon with benefits for patients with chronic conditions, such as cystic fibrosis (CF). However, previous research has not examined what may facilitate or hinder the implementation of such innovations from the provider perspective.
    OBJECTIVE: The aim of this study was to explain variations in the adoption of a patient-driven innovation among CF clinics.
    METHODS: A comparative multiple-case study was conducted on the adoption of a patient-controlled app to support self-management and collaboration with health care professionals (HCPs). Data collection and analysis were guided by the nonadoption, abandonment, spread, scale-up, and sustainability and complexity assessment tool (NASSS-CAT) framework. Data included user activity levels of patients and qualitative interviews with staff at 9 clinics (n=8, 88.9%, in Sweden; n=1, 11.1%, in the United States). We calculated the maximum and mean percentage of active users at each clinic and performed statistical process control (SPC) analysis to explore how the user activity level changed over time. Qualitative data were subjected to content analysis and complexity analysis and used to generate process maps. All data were then triangulated in a cross-case analysis.
    RESULTS: We found no evidence of nonadoption or clear abandonment of the app. Distinct patterns of innovation adoption were discernable based on the maximum end-user activity for each clinic, which we labeled as low (16%-23%), middle (25%-47%), or high (58%-95%) adoption. SPC charts illustrated that the introduction of new app features and research-related activity had a positive influence on user activity levels. Variation in adoption was associated with providers\' perceptions of care process complexity. A higher perceived complexity of the value proposition, adopter system, and organization was associated with lower adoption. In clinics that adopted the innovation early or those that relied on champions, user activity tended to plateau or decline, suggesting a negative impact on sustainability.
    CONCLUSIONS: For patient-driven innovations to be adopted and sustained in health care, understanding patient-provider interdependency and providers\' perspectives on what generates value is essential.
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  • 文章类型: Journal Article
    在过去的几十年里,信息和通信技术(ICT)彻底改变了护理和患者医疗保健管理领域。此范围审查和随附的案例研究揭示了ICT在这些关键医疗保健领域的广泛范围和影响。范围审查探讨了护理和患者医疗保健管理中使用的各种ICT工具。这些工具包括电子健康记录系统,移动应用程序,远程医疗解决方案,远程监控系统,还有更多.本文强调了这些技术如何提高效率,准确度,和临床信息的可及性,有助于改善患者护理。ICT革命振兴了护理和患者管理,提高护理质量和患者满意度。这篇评论和随附的案例研究强调了ICT在医疗保健领域的持续潜力,并呼吁进一步研究以最大限度地提高其收益。
    Over the past few decades, Information and Communication Technologies (ICT) have revolutionized the fields of nursing and patient healthcare management. This scoping review and the accompanying case studies shed light on the extensive scope and impact of ICT in these critical healthcare domains. The scoping review explores the wide array of ICT tools employed in nursing care and patient healthcare management. These tools encompass electronic health records systems, mobile applications, telemedicine solutions, remote monitoring systems, and more. This article underscores how these technologies have enhanced the efficiency, accuracy, and accessibility of clinical information, contributing to improved patient care. ICT revolution has revitalized nursing care and patient management, improving the quality of care and patient satisfaction. This review and the accompanying case studies emphasize the ongoing potential of ICT in the healthcare sector and call for further research to maximize its benefits.
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  • 文章类型: Journal Article
    背景:了解坚持家庭锻炼计划对中风幸存者的作用对于确保患者进行规定的锻炼并最大程度地提高康复效果至关重要。
    方法:招募运动功能受损的偏瘫性中风幸存者参加一项为期7天的研究,旨在测试低成本可穿戴系统和渐进式挑战提示锻炼计划的实用性和可用性,以鼓励在家中进行分级挑战锻炼。可穿戴系统包括两个手腕佩戴的MetaMotionR+活动监视器和一个定制的智能手机应用程序。渐进式挑战提示锻炼计划包括每天1.5h的高强度活动(每30s重复一次),嵌入每天8小时的被动活动监测。使用系统正常运行时间和提示响应率的度量来评估效用。使用经过充分验证的系统可用性和用户体验定量调查来评估可用性和用户体验。每天结束时,以0至100的视觉模拟量表评估自我效能。
    结果:系统和锻炼计划具有客观实用性:系统正常运行时间为预期小时数的92±6.9%,提示传递成功率为99±2.7%。该系统和程序在激励提示运动方面也有效:在提示98±3.1%的时间内的5秒内检测到活动。如通过两个案例研究所示,加速度测量数据可以准确地反映分级挑战运动指令,并揭示不同运动阶段的可区分活动水平。用户体验调查表明,在家庭环境中总体可用性是积极的,使用该系统的强烈个人动机,以及对设备的高度满意度,并提供培训。自我效能评估表明参与者对熟练程度的强烈感知(95±5.0)。
    结论:这项研究表明,低成本的可穿戴系统提供频繁的触觉提示以鼓励中风后的分级挑战锻炼可以具有实用性,并且可以在家庭环境中提供整体积极的用户体验。该研究还展示了如何将分级锻炼计划与全天活动监测相结合,可以深入了解可穿戴系统在个性化基础上评估家庭锻炼计划的依从性和有效性的潜力。
    BACKGROUND: Understanding the role of adherence to home exercise programs for survivors of stroke is critical to ensure patients perform prescribed exercises and maximize effectiveness of recovery.
    METHODS: Survivors of hemiparetic stroke with impaired motor function were recruited into a 7-day study designed to test the utility and usability of a low-cost wearable system and progressive-challenge cued exercise program for encouraging graded-challenge exercise at-home. The wearable system comprised two wrist-worn MetaMotionR+ activity monitors and a custom smartphone app. The progressive-challenge cued exercise program included high-intensity activities (one repetition every 30 s) dosed at 1.5 h per day, embedded within 8 h of passive activity monitoring per day. Utility was assessed using measures of system uptime and cue response rate. Usability and user experience were assessed using well-validated quantitative surveys of system usability and user experience. Self-efficacy was assessed at the end of each day on a visual analog scale that ranged from 0 to 100.
    RESULTS: The system and exercise program had objective utility: system uptime was 92 ± 6.9% of intended hours and the rate of successful cue delivery was 99 ± 2.7%. The system and program also were effective in motivating cued exercise: activity was detected within 5-s of the cue 98 ± 3.1% of the time. As shown via two case studies, accelerometry data can accurately reflect graded-challenge exercise instructions and reveal differentiable activity levels across exercise stages. User experience surveys indicated positive overall usability in the home settings, strong levels of personal motivation to use the system, and high degrees of satisfaction with the devices and provided training. Self-efficacy assessments indicated a strong perception of proficiency across participants (95 ± 5.0).
    CONCLUSIONS: This study demonstrates that a low-cost wearable system providing frequent haptic cues to encourage graded-challenge exercise after stroke can have utility and can provide an overall positive user experience in home settings. The study also demonstrates how combining a graded exercise program with all-day activity monitoring can provide insight into the potential for wearable systems to assess adherence to-and effectiveness of-home-based exercise programs on an individualized basis.
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  • 文章类型: Journal Article
    共享经济应用,比如Uber,Airbnb,还有TaskRabbit,在过去十年中产生了巨大的消费者兴趣。这些应用程序实现的独特形式的点对点业务交换与显著的经济增长水平有关,帮助资源有限社区的人们建立社会资本,提升经济阶梯。然而,由于其运营环境的多维性质,缺乏有效的方法来捕捉和描述他们的最终用户的担忧,共享经济应用程序通常难以生存。为了应对这些挑战,在本文中,我们研究了共享经济应用程序生态系统中的人群反馈。具体来说,我们提出了一个针对食品配送应用程序生态系统的案例研究。采用定性分析方法,我们综合了Twitter提要和这些应用程序的应用程序商店评论中存在的重要用户关注问题。我们进一步提出并内在地评估了用于生成这些关注点的简洁模型的自动化程序。我们的工作为全面了解共享经济应用程序生态系统中的用户需求迈出了第一步。我们的目标是为共享经济应用程序开发人员提供系统的指导方针,以帮助他们最大限度地提高市场适应性,减轻最终用户的担忧并优化他们的体验。
    Sharing Economy apps, such as Uber, Airbnb, and TaskRabbit, have generated a substantial consumer interest over the past decade. The unique form of peer-to-peer business exchange these apps have enabled has been linked to significant levels of economic growth, helping people in resource-constrained communities to build social capital and move up the economic ladder. However, due to the multidimensional nature of their operational environments, and the lack of effective methods for capturing and describing their end-users\' concerns, Sharing Economy apps often struggle to survive. To address these challenges, in this paper, we examine crowd feedback in ecosystems of Sharing Economy apps. Specifically, we present a case study targeting the ecosystem of food delivery apps. Using qualitative analysis methods, we synthesize important user concerns present in the Twitter feeds and app store reviews of these apps. We further propose and intrinsically evaluate an automated procedure for generating a succinct model of these concerns. Our work provides a first step toward building a full understanding of user needs in ecosystems of Sharing Economy apps. Our objective is to provide Sharing Economy app developers with systematic guidelines to help them maximize their market fitness and mitigate their end-users\' concerns and optimize their experience.
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  • 文章类型: Journal Article
    本研究通过实证评估了18个产后护理移动应用程序(应用程序)的功能覆盖范围,其中包括最近在摩洛哥开发的应用程序“Mamma&Baby”。此评估基于对这些应用程序的COSMIC_ISO19,761功能大小与先前通过质量评估问卷基于功能提取的评估中获得的分数的比较。此比较允许讨论18个应用程序的功能大小之间的关系,他们在Play商店中的用户\'评级以及下载次数。虽然对于大多数评估的应用程序,两次评估的排名之间只有很小的变化,对于某些应用程序,由于添加的功能数量以及先前获得的分数未涵盖的数量,因此这种转变是巨大的。这项研究说明了使用COSMIC作为纠正或进化更新的有效方法,因为它考虑了产后应用程序的所有功能和特征。对于“妈妈和宝宝”应用程序,需要努力提高下载数量,优化其可见性,吸引最多的用户。
    This study empirically evaluates the functionality coverage of 18 mobile applications (apps) for Postnatal care including a recently developed app in Morocco \"Mamma&Baby\". This evaluation is based on a comparison of the COSMIC _ISO 19,761 functional size of these apps with the score obtained in a previous evaluation based on functions extraction through a quality assessment questionnaire. This comparison allows to discuss the relationship between the functional size of the 18 apps, their users\' ratings in the Play Store as well as the number of downloads. While for most of the assessed apps, there is only a small shift between the rankings of the two evaluations, for some apps, the shift is huge due to the number of features added and not covered by the score previously obtained. This study illustrates the use of COSMIC as an effective method for corrective or evolutionary updates since it takes into account all the functions and features of postnatal apps. For the \"Mamma&Baby\" app, efforts are required to boost the number of downloads, optimize its visibility, and attract the highest number of users.
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  • 文章类型: Journal Article
    背景:为脑瘫(CP)儿童规定了家庭锻炼计划(HEP),以增加运动练习的频率,然而,坚持HEP可能很低。本文概述了采用交替治疗的单例实验设计(SCED)的方案,使用新的家庭治疗锻炼应用程序,BootleBootCamp(BBCamp),提供有和没有运动跟踪反馈。这项研究将探讨反馈对参与度的影响,运动质量,下肢功能和家庭经验,以帮助了解技术支持的HEP应如何转化和附加值,如果有的话,运动跟踪技术。
    方法:在使用SCED的解释性序贯混合方法研究中,16名CP儿童(6-12岁,粗大运动功能分类系统I-II级)将设置下肢目标,并由其物理治疗师指定个性化HEP,以在配备有三维摄像机计算机系统的家庭电视上使用BBCamp完成。儿童将在6周内完成每周四次的锻炼。儿童将被随机分配到16个交替治疗方案中的1个,BBCamp将在前4周内提供或保留反馈。导致最大治疗益处的BBCamp版本将持续2周。将重新评估目标,并采访家人。主要结果是依从性(重复尝试的规定锻炼的比例)作为行为参与的量度。次要结果是情感和认知参与(笑脸评分),运动保真度,下肢功能,目标成就和参与者体验。SCED数据将使用视觉和统计方法进行分析。定量和定性数据将使用联合显示进行整合。
    背景:获得了Bloorview研究所和多伦多大学研究伦理委员会的伦理批准。结果将通过同行评审的期刊和科学会议分发。
    背景:NCT05998239;预结果。
    BACKGROUND: Children with cerebral palsy (CP) are prescribed home exercise programmes (HEPs) to increase the frequency of movement practice, yet adherence to HEPs can be low. This paper outlines the protocol for a single-case experimental design (SCED) with alternating treatments, using a new home therapy exercise application, Bootle Boot Camp (BBCamp), offered with and without movement tracking feedback. This study will explore the impact of feedback on engagement, movement quality, lower limb function and family experiences to help understand how technology-supported HEPs should be translated and the added value, if any, of movement tracking technology.
    METHODS: In this explanatory sequential mixed-methods study using a SCED, 16 children with CP (aged 6-12 years, Gross Motor Function Classification System levels I-II) will set lower limb goals and be prescribed an individualised HEP by their physiotherapist to complete using BBCamp on their home television equipped with a three-dimensional camera-computer system. Children will complete four weekly exercise sessions over 6 weeks. Children will be randomised to 1 of 16 alternating treatment schedules where BBCamp will provide or withhold feedback during the first 4 weeks. The version of BBCamp that results in the most therapeutic benefit will be continued for 2 final weeks. Goals will be re-evaluated and families interviewed. The primary outcome is adherence (proportion of prescribed exercise repetitions attempted) as a measure of behavioural engagement. Secondary outcomes are affective and cognitive engagement (smiley face ratings), exercise fidelity, lower limb function, goal achievement and participant experiences. SCED data will be analysed using visual and statistical methods. Quantitative and qualitative data will be integrated using joint displays.
    BACKGROUND: Ethical approval was obtained from the Research Ethics Boards at Bloorview Research Institute and the University of Toronto. Results will be distributed through peer-reviewed journals and scientific conferences.
    BACKGROUND: NCT05998239; pre-results.
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  • 文章类型: Journal Article
    背景:健康方面的进步突出了将技术作为诊断的基本部分的必要性,治疗,以及有健康变化风险或有健康变化的患者的康复。为此,数字平台已经证明了它们在识别护理需求方面的适用性。护理是心血管疾病患者护理的基本组成部分,在诊断人类对这些健康状况的反应中起着至关重要的作用。因此,通过正在进行的研究过程对护理诊断进行验证已成为必要,这可能会对患者和医疗保健专业人员产生重大影响.
    目的:我们旨在描述开发移动应用程序的过程,以验证急性心肌梗死患者的护理诊断“对身体活动不耐受”。
    方法:我们描述了移动系统的开发和试点测试,以支持数据收集,以验证活动不耐受的护理诊断。这是一项描述性研究,对11名成年人(年龄≥18岁)进行了描述性研究,他们在2019年8月至9月期间在Floridablanca因高度复杂的需求而被怀疑诊断为冠状动脉综合征,哥伦比亚。在急性冠状动脉综合征患者中开发了一种用于临床验证活动不耐受的应用程序(北美护理诊断协会[NANDA]代码00092),分为两个步骤:(1)护理诊断的可操作性和(2)应用程序开发过程,其中包括对初始要求的评估,形式的发展和数字化,和试点测试。用κ指数评价2名评估护士之间的一致水平。
    结果:我们开发了一种包含社会人口统计数据的表格,入院数据,病史,目前的药物治疗,心肌梗死溶栓风险评分(TIMI-RS)和GRACE(全球急性冠脉事件注册)评分。要识别定义特征,我们包括官方指导方针,生理测量,以及Piper疲劳量表和Borg量表等量表。试点测试的参与者(n=11)的平均年龄为63.2(SD4.0)岁,男性占82%(9/11);18%(2/11)的小学教育不完整。对于大多数定义特征,评估人员之间的一致性约为80%。最普遍的特征是运动不适(10/11,91%),弱点(7/11,64%),呼吸困难(3/11,27%),运动时心率异常(2/10,20%),心电图异常(1/10,9%),和对活动反应的异常血压(1/10,10%)。
    结论:我们开发了一个移动应用程序来验证“活动不耐受”的诊断。它的使用不仅保证了最佳的数据收集,最小化错误以执行验证,但也将允许识别个人护理需求。
    BACKGROUND: Advances in health have highlighted the need to implement technologies as a fundamental part of the diagnosis, treatment, and recovery of patients at risk of or with health alterations. For this purpose, digital platforms have demonstrated their applicability in the identification of care needs. Nursing is a fundamental component in the care of patients with cardiovascular disorders and plays a crucial role in diagnosing human responses to these health conditions. Consequently, the validation of nursing diagnoses through ongoing research processes has become a necessity that can significantly impact both patients and health care professionals.
    OBJECTIVE: We aimed to describe the process of developing a mobile app to validate the nursing diagnosis \"intolerance to physical activity\" in patients with acute myocardial infarction.
    METHODS: We describe the development and pilot-testing of a mobile system to support data collection for validating the nursing diagnosis of activity intolerance. This was a descriptive study conducted with 11 adults (aged ≥18 years) who attended a health institution for highly complex needs with a suspected diagnosis of coronary syndrome between August and September 2019 in Floridablanca, Colombia. An app for the clinical validation of activity intolerance (North American Nursing Diagnosis Association [NANDA] code 00092) in patients with acute coronary syndrome was developed in two steps: (1) operationalization of the nursing diagnosis and (2) the app development process, which included an evaluation of the initial requirements, development and digitization of the forms, and a pilot test. The agreement level between the 2 evaluating nurses was evaluated with the κ index.
    RESULTS: We developed a form that included sociodemographic data, hospital admission data, medical history, current pharmacological treatment, and thrombolysis in myocardial infarction risk score (TIMI-RS) and GRACE (Global Registry of Acute Coronary Events) scores. To identify the defining characteristics, we included official guidelines, physiological measurements, and scales such as the Piper fatigue scale and Borg scale. Participants in the pilot test (n=11) had an average age of 63.2 (SD 4.0) years and were 82% (9/11) men; 18% (2/11) had incomplete primary schooling. The agreement between the evaluators was approximately 80% for most of the defining characteristics. The most prevalent characteristics were exercise discomfort (10/11, 91%), weakness (7/11, 64%), dyspnea (3/11, 27%), abnormal heart rate in response to exercise (2/10, 20%), electrocardiogram abnormalities (1/10, 9%), and abnormal blood pressure in response to activity (1/10, 10%).
    CONCLUSIONS: We developed a mobile app for validating the diagnosis of \"activity intolerance.\" Its use will guarantee not only optimal data collection, minimizing errors to perform validation, but will also allow the identification of individual care needs.
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    文章类型: Journal Article
    超级应用程序(即集成了多个应用程序功能以获得更方便的用户体验的应用程序)已在Internet用户中无处不在。本案例研究考察了最近一个这样的应用程序的中断:KakaoTalk-韩国使用最广泛的消息传递应用程序。具体来说,该案例研究调查了SKC&C数据中心的一起火灾事件,这导致韩国领先的科技公司之一-KakaoCorp.对这一事件的审查揭示了无效的灾难准备是如何导致火灾反应不足的,导致整个数据中心的严重连锁反应。在停电期间,网络安全威胁上升。由于这些中断,Kakao用户转向竞争对手的应用程序,导致不断变化的市场动态。本案例研究强调了这种中断造成的不可预见的成本和社会经济影响,强调整体风险管理战略的重要性。
    Superapps (ie apps that integrate the features of multiple applications for a more convenient user experience) have become pervasive among Internet users. This case study examines a recent disruption to one such application: KakaoTalk - the most widely used messaging application in South Korea. Specifically, the case study examines a fire incident at the SK C&C data centre, which caused an extended outage for one of South Korea\'s leading tech companies - Kakao Corp. The review of this event reveals how ineffective disaster readiness resulted in inadequate fire response, leading to serious ripple effects across the data centre. During the outage, cyber-security threats rose. As a result of these disruptions, Kakao users turned to competitor apps, resulting in changing market dynamics. This case study highlights the unforeseen costs and socio-economic influences caused by such interruptions, highlighting the importance of holistic risk management strategies.
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  • 文章类型: Journal Article
    天然核苷是非荧光的并且不具有可以容易地用于分析核酸结构和识别的内在标记。在这方面,研究人员通常使用所谓的“一个标签,一种技术“研究核酸的方法”。然而,我们设想了一种响应式双应用核苷系统,它利用了两种互补的生物物理技术的力量,即,荧光和19FNMR,将允许比以前更全面地研究核酸构象。我们最近通过在2'-脱氧尿苷的C5位置标记三氟甲基-苯并呋喃来引入核苷类似物,它是一种出色的荧光和19FNMR探针,用于研究G-四链体和i-基序结构。向前看,在这里,我们报道了双app探针核糖核苷酸版本的开发,用于监测抗生素诱导的RNA构象变化.核糖核苷酸类似物通过在尿苷的C5位置缀合三氟甲基-苯并呋喃(TFBF-UTP)而衍生。通过T7RNA聚合酶有效地掺入类似物以产生官能化的RNA转录物。掺入RNA寡核苷酸中的核苷和核苷酸的详细光物理和19FNMR表明,该类似物在结构上具有最小的侵入性,可用于通过荧光和19FNMR技术探测RNA构象。使用探头,我们监测并估计了与细菌核糖体解码位点RNA结合的氨基糖苷类抗生素(A位点,一个非常重要的RNA靶标)。而2-氨基嘌呤,著名的荧光核酸探针,未能检测到与A位点结合的结构相似的氨基糖苷类抗生素,我们的探针报告了不同氨基糖苷与A位点的结合。一起来看,我们的结果表明,TFBF-UTP是核酸分析工具箱中非常有用的补充,可用于设计发现平台,以鉴定具有治疗潜力的新RNA结合剂.
    Natural nucleosides are nonfluorescent and do not have intrinsic labels that can be readily utilized for analyzing nucleic acid structure and recognition. In this regard, researchers typically use the so-called \"one-label, one-technique\" approach to study nucleic acids. However, we envisioned that a responsive dual-app nucleoside system that harnesses the power of two complementing biophysical techniques namely, fluorescence and 19F NMR, will allow the investigation of nucleic acid conformations more comprehensively than before. We recently introduced a nucleoside analogue by tagging trifluoromethyl-benzofuran at the C5 position of 2\'-deoxyuridine, which serves as an excellent fluorescent and 19F NMR probe to study G-quadruplex and i-motif structures. Taking forward, here, we report the development of a ribonucleotide version of the dual-app probe to monitor antibiotics-induced conformational changes in RNA. The ribonucleotide analog is derived by conjugating trifluoromethyl-benzofuran at the C5 position of uridine (TFBF-UTP). The analog is efficiently incorporated by T7 RNA polymerase to produce functionalized RNA transcripts. Detailed photophysical and 19F NMR of the nucleoside and nucleotide incorporated into RNA oligonucleotides revealed that the analog is structurally minimally invasive and can be used for probing RNA conformations by fluorescence and 19F NMR techniques. Using the probe, we monitored and estimated aminoglycoside antibiotics binding to the bacterial ribosomal decoding site RNA (A-site, a very important RNA target). While 2-aminopurine, a famous fluorescent nucleic acid probe, fails to detect structurally similar aminoglycoside antibiotics binding to the A-site, our probe reports the binding of different aminoglycosides to the A-site. Taken together, our results demonstrate that TFBF-UTP is a very useful addition to the nucleic acid analysis toolbox and could be used to devise discovery platforms to identify new RNA binders of therapeutic potential.
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