Techniques

技术
  • 文章类型: Journal Article
    结直肠癌是男性中第三大最常见的癌症,在女性中排名第二。仅在美国,每年有15万例确诊病例。结肠镜检查仍然是最好的鉴别方法,评估,并对癌前病变患者进行干预。多种指南和技术可用于协助内窥镜医师准确诊断这些病变。其中包括巴黎,窄带成像(NBI)国际结直肠内镜(NICE),日本NBI专家团队(JNET)Kudo,广岛,和Shudo分类利用诸如色素内窥镜检查之类的技术,窄带成像,和细胞内镜检查以评估凹坑模式和表面形态。利用这些工具可以帮助内窥镜医师预测结肠病变的细胞学,并选择最合适的切除方法,同时最大程度地保留器官。
    Colorectal cancer is the third most common cancer among men and the second among women. In the United States alone, there are 150,000 cases diagnosed each year. Colonoscopy remains the best method for identifying, evaluating, and intervening on patients with precancerous lesions. Multiple guidelines and techniques are available to assist the endoscopist with accurate diagnosis of these lesions. These include the Paris, Narrow-Band Imaging (NBI) International Colorectal Endoscopic (NICE), Japan NBI Expert Team (JNET), Kudo, Hiroshima, and Shudo classifications which utilize techniques such as chromoendoscopy, narrow-band imaging, and endocytoscopy to evaluate pit pattern and surface morphology. Utilization of these tools can help the endoscopist predict the cytology of a colonic lesion and select the most appropriate method for resection while maximizing organ preservation.
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  • 文章类型: Journal Article
    各种各样的疫霉种类,包括许多重要的植物病原体,在地表水灌溉水源中被广泛发现。在过去的十年里,元编码已用于表征水性疫霉种群。代谢编码通常涉及从疫霉物种中扩增核核糖体内部转录间隔区(ITS)1或ITS2的部分,其次是索引高通量测序。然而,整个ITS区域的全长序列是许多疫霉物种的分辨率所必需的。我们使用PacBio对全长ITS扩增子进行测序,以分析加利福尼亚州圣华金河谷北部斯托克顿东水区(SEWD)水道中的疫霉种群。这种方法产生了疫霉群落许多成员的物种级分辨率。将结果与仅使用ITS1或ITS2区域获得的结果进行比较,发现它们为P.pini提供了更好的物种分辨率,P.Capsici,还有P.Gregata.在整个2021年的灌溉季节,从整个SEWD的五个水道中收集了样品。在水道中检测到38种疫霉菌,包括树木作物病原体。P.cactorum,P.Pini,P.×cambivora,P.Niederhauserii,P.mediterranea,和P.优生核桃。在整个灌溉季节的大部分时间里,在整个SEWD中都检测到了这些致病物种。结果表明,全长ITS扩增子测序可用于鉴定环境样品中的疫霉物种,并表明用SEWD水灌溉的果园可能会带来一些疾病风险。需要额外的流行病学研究来严格评估这种风险。
    Diverse Phytophthora species, including many important plant pathogens, have been widely detected among surface water irrigation sources. In the past decade, metabarcoding has been used to characterize waterborne Phytophthora populations. Metabarcoding typically involves amplification of portions of the nuclear ribosomal internal transcribed spacer (ITS)1 or ITS2 from Phytophthora species, followed by indexed high throughput sequencing. However, full-length sequences of the entire ITS region are required for resolution of many Phytophthora species. We used metabarcoding with PacBio sequencing of full-length ITS amplicons to analyze populations of Phytophthora in waterways of the Stockton East Water District (SEWD) in the northern San Joaquin Valley of California. This approach yielded species-level resolution of many members of the Phytophthora community. Results were compared to those obtained by using ITS1 or ITS2 regions alone and were found to provide superior species resolution for P. pini, P. capsici, and P. gregata. Samples were collected throughout the 2021 irrigation season from five waterways across the SEWD. Thirty-eight Phytophthora species were detected in the waterways, including tree-crop pathogens P. acerina, P. cactorum, P. pini, P. ×cambivora, P. niederhauserii, P. mediterranea, and P. taxon walnut. These pathogenic species were detected throughout the SEWD during most of the irrigation season. The results demonstrated the utility of full-length ITS amplicon sequencing for identifying Phytophthora species in environmental samples and suggested that some disease risk may be incurred by orchardists irrigating with SEWD water. Additional epidemiological studies will be required to critically evaluate this risk.
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  • 文章类型: Journal Article
    在交配/授精后不久检测妊娠和确定胎龄的新技术对于加快生殖周期和确保畜牧业的高生殖效率至关重要。超声检查可以成功地识别怀孕并确定许多家畜的胎龄。另一方面,许多成群的骆驼、水牛和成群的绵羊都知道服务的日子,使得适当管理怀孕的动物变得困难。这项研究提供了有关超声诊断骆驼妊娠的各种技术的文献综述,水牛,羊,专注于使用每种技术的最合适时间,最早诊断怀孕的机会,以及使用胎儿的各个部分创建数学方程式来确定胎龄的可能性。确定了超声检查在妊娠诊断中的一些局限性,并讨论了单峰性妊娠的重要妊娠事件,包括左角妊娠和双胎妊娠.这里提供的数据将证明对研究人员至关重要,农民,以及严重依赖这些动物提供肉类的国家,牛奶,化妆品,和其他动物产品,以提高繁殖和生产效率。
    New technologies for detecting pregnancy shortly after mating/insemination and identifying gestational age are essential for speeding up the reproductive cycle and ensuring high reproductive efficiency in livestock farming. Ultrasonography can successfully identify pregnancy and determine gestational age in many domestic animals. On the other hand, many herds of camel and buffalo and flocks of sheep are aware of the day of service, making it difficult to appropriately manage pregnant animals. This study provides a review of the literature on various techniques for ultrasonographically diagnosing pregnancy in camels, buffaloes, and sheep, focusing on the most appropriate times to use each technique, the earliest opportunity to diagnose pregnancy, and the possibility of using various parts of the fetus to create mathematical equations to determine gestational age. Some limitations of ultrasonography in pregnancy diagnosis were identified and significant pregnancy events in dromedaries were discussed, including left-horn and twin pregnancies. The data presented here will prove essential for researchers, farmers, and countries that rely heavily on these animals for providing meat, milk, cosmetics, and other animal products to enhance reproduction and production efficiency.
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  • 文章类型: Journal Article
    再生医学领域越来越需要用于组织工程的有效和生物相容性材料。人脱细胞真皮基质(hADM)衍生的胶原蛋白基质是特别有前途的候选物。它们保持结构完整性的能力,再加上卓越的生物相容性,将它们定位为组织替代的可行选择。然而,它们的临床应用主要限于用作支架。本研究旨在通过探索不同的尖端临床需求来扩大胶原蛋白片的临床应用范围。这篇综述说明了胶原蛋白片的临床应用,超越了传统的作用,如覆盖皮肤缺损或单独充当支架。特别是,Epiflex®的潜力,一种商业上可获得的和临床上立即可用的同种异体膜,将被评估。胶原蛋白片已证明在骨重建中的功效,他们可以在单阶段程序中替代诱导的Masquelet膜,证明是临床有效和安全的。这些膜的应用可以重建大量的组织缺损,不需要大量的整形手术。此外,他们被发现是适合解决骨软骨炎的病变和韧带重建的。本研究中展示的令人信服的临床实例证实,人类ADM的应用大大超出了其最初用于皮肤缺损治疗的范围。hADM已被证明是非常成功和耐受性良好的管理各种病因的骨和软组织缺损,提高患者护理效果。特别是,从货架上的应用减少了额外的手术或供体部位缺陷的需要。
    The field of regenerative medicine is increasingly in need of effective and biocompatible materials for tissue engineering. Human acellular dermal matrix (hADM)-derived collagen matrices stand out as a particularly promising candidate. Their ability to preserve structural integrity, coupled with exceptional biocompatibility, positions them as a viable choice for tissue replacement. However, their clinical application has been largely confined to serving as scaffolds. This study aims to expand the horizon of clinical uses for collagen sheets by exploring the diverse cutting-edge clinical demands. This review illustrates the clinical utilizations of collagen sheets beyond traditional roles, such as covering skin defects or acting solely as scaffolds. In particular, the potential of Epiflex®, a commercially available and immediately clinically usable allogeneic membrane, will be evaluated. Collagen sheets have demonstrated efficacy in bone reconstruction, where they can substitute the induced Masquelet membrane in a single-stage procedure, proving to be clinically effective and safe. The application of these membranes allow the reconstruction of substantial tissue defects, without requiring extensive plastic reconstructive surgery. Additionally, they are found to be apt for addressing osteochondritis dissecans lesions and for ligament reconstruction in the carpus. The compelling clinical examples showcased in this study affirm that the applications of human ADM extend significantly beyond its initial use for skin defect treatments. hADM has proven to be highly successful and well-tolerated in managing various etiologies of bone and soft tissue defects, enhancing patient care outcomes. In particular, the application from the shelf reduces the need for additional surgery or donor site defects.
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  • 文章类型: Journal Article
    \'亚洲自由念珠菌\',柑橘绿化病的推定病原体是由亚洲柑橘木虱传播的,在一个传播者中,循环,和坚持不懈的态度。不幸的是,\'Ca.在纯培养中还没有L.asiaticus\'来执行Koch的假设并确认其病因。当纯粹的文化可用时,测试其在昆虫媒介和植物宿主中的感染性的方法将是至关重要的。在这里,我们描述了一种基于使用从受感染的柑橘植物中提取的韧皮部汁液和局部饲喂柑橘若虫的传播试验。通过离心收集韧皮部汁液,用含有20%(w/v)蔗糖和0.1%抗坏血酸(w/v)作为抗氧化剂的0.1M磷酸盐缓冲液pH7.4稀释,并通过将液滴放在口器上传递给第三至第五龄若虫。若虫将探针展开,并获得含有细菌病原体的韧皮部汁液。然后将若虫置于柑橘幼苗(10个若虫/幼苗)上两周的接种期。在接种后6个月记录到高达80%的传播率。该方法可以是测试细菌病原体在各种处理后的可传播性以降低细菌的生存力或阻断其传播的有力工具。此外,如果纯培养Ca,这可能是实现科赫假设的有效检测方法。L.asiaticus\'变得可用。
    \'Candidatus Liberibacter asiaticus\', the putative causal agent of citrus greening disease is transmitted by the Asian citrus psyllid, Diaphorina citri in a propagative, circulative, and persistent manner. Unfortunately, \'Ca. L. asiaticus\' is not yet available in pure culture to carry out Koch\'s postulates and to confirm its etiology. When a pure culture is available, an assay to test its infectivity in both the insect vector and the plant host will be crucial. Herein, we described a transmission assay based on the use of phloem sap extracted from infected citrus plants and topical feeding to D. citri nymphs. Phloem sap was collected by centrifugation, diluted with 0.1 M phosphate buffer pH 7.4 containing 20% (w/v) sucrose and 0.1% ascorbic acid (w/v) as an antioxidant, and delivered to third through fifth instar nymphs by placing droplets on the mouthparts. Nymphs unfolded the stylets and acquired the phloem sap containing the bacterial pathogen. Nymphs were then placed onto Citrus macrophylla seedlings (ten nymphs/seedling) for an inoculation period of two weeks. A transmission rate of up to 80% was recorded at six months post-inoculation. The method could be a powerful tool to test the transmissibility of the bacterial pathogen after various treatments to reduce the viability of the bacteria or to block its transmission. In addition, it might be a potent assay to achieve Koch\'s postulates if a pure culture of \'Ca. L. asiaticus\' becomes available.
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  • 文章类型: Journal Article
    由蚜虫传播的黄矮病毒(YDV)是全球经济上最重要的大麦(HordeumvulgareL.)病毒载体复合物。这些病毒的检测和控制是大麦生产的关键组成部分,小麦,以及许多其他具有农业重要性的草。植物病害的基因控制通常比化学控制更可取,以减少流行病学。环境,和叶面杀虫剂的经济成本。因此,这项工作的目的是I)使用疾病症状的表型评估,筛选大麦种群对自然感染下的YDV抗性,II)实施无人机图像以进一步评估耐药性并测试其作为疾病筛查工具的效用,III)确定实验环境中流行的病毒和载体类型,和IV)进行全基因组关联研究,以鉴定与测量性状相关的基因组区域。在192个大麦自交系的群体中,发现其YDV症状严重程度存在显着遗传差异,并且症状与谷物产量中度至高度相关。航空成像测量的YDV严重程度与地面估计值高度相关(r=0.65)。鉴定出3种蚜虫物种对3种YDV物种的媒介,对其分布没有明显的基因型影响。在染色体2H上检测到影响YDV抗性的QTL,尽管使用航空成像未被发现。然而,使用无人机成功绘制了冠层覆盖和平均NDVI的QTL。这项工作为将来在谷物和草类中YDV的抗性育种工作中利用无人机图像提供了一个框架,和其他病毒载体疾病复合体。
    Yellow Dwarf Viruses (YDV) spread by aphids are some of the most economically important barley (Hordeum vulgare L.) virus-vector complexes worldwide. Detection and control of these viruses are critical components in the production of barley, wheat, and numerous other grasses of agricultural importance. Genetic control of plant diseases is often preferable to chemical control to reduce the epidemiological, environmental, and economic cost of foliar insecticides. Accordingly, the objectives of this work were to I) screen a barley population for resistance to YDV under natural infection using phenotypic assessment of disease symptoms, II) implement drone imagery to further assess resistance and test its utility as a disease screening tool, III) identify the prevailing virus and vector types in the experimental environment, and IV) perform a genome-wide association study to identify genomic regions associated with measured traits. Significant genetic differences were found in a population of 192 barley inbred lines regarding their YDV symptom severity and symptoms were moderately to highly correlated with grain yield. The severity of YDV measured with aerial imaging was highly correlated with on-the-ground estimates (r=0.65). Three aphid species vectoring three YDV species were identified with no apparent genotypic influence on their distribution. A QTL impacting YDV resistance was detected on chromosome 2H, albeit undetected using aerial imaging. However, QTL for canopy cover and mean NDVI were successfully mapped using the drone. This work provides a framework for utilizing drone imagery in future resistance breeding efforts for YDV in cereals and grasses, and in other virus-vector disease complexes.
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  • 文章类型: Journal Article
    近年来,全球多个国家已经在国家医疗保健系统内实施了行为干预措施。描述这些干预措施的内容对于改善其实施至关重要,复制,和有效性,以及推进行为科学。工具,比如行为改变技术分类,可以提高干预描述和报告的质量。由于经常在不使用此类工具的情况下制定干预措施,对现有干预措施进行回顾性编码以准确描述其内容变得越来越普遍。然而,使用这些工具进行回顾性编码带来了各种挑战,到目前为止,它的讨论一直被忽视。本评论讨论了在回顾性描述英国和爱尔兰共和国的五个国家实施的2型糖尿病计划的内容时遇到的挑战,并提出了应对这些挑战的建议。我们提出了重要的方法论,实用,以及研究人员需要反思的伦理考虑,与现有干预措施的回顾性描述相关。具体来说,我们讨论了(I)与干预利益相关者建立积极关系和合作的重要性,(ii)分析实施干预措施的内容时的实践和道德考虑因素,(三)研究团队的独立性和干预内容错误分类的可能性,和(iv)与使用行为科学工具分析干预内容相关的挑战。越来越需要更强大的方法来解决方法论,实用,以及与此类研究相关的伦理挑战。本评论描述了研究小组要考虑的关键问题,以及改善干预内容回顾性特征的具体建议。
    在本评论中,我们讨论了研究人员如何最好地描述现有行为干预的内容.我们讨论了在分析英国和爱尔兰共和国2型糖尿病预防和管理的行为干预措施时面临的挑战。具体来说,我们思考与负责制定和/或实施干预措施的人建立良好关系和合作的重要性,重要的实践和道德考虑,处理研究团队的独立性,用行为科学工具指导干预内容的分析。我们还分享了我们从这些经验中学到的东西,以及关于如何应对这些挑战的一些想法。我们的经验和教训可以为未来对现有干预措施的分析提供宝贵的见解。
    In recent years, multiple countries worldwide have implemented behavioural interventions within national healthcare systems. Describing the content of these interventions is critical to improve their implementation, replication, and effectiveness, as well as to advance behavioural science. Tools, such as the Behaviour Change Technique Taxonomy, can enhance the quality of intervention description and reporting. As interventions are frequently developed without the use of such tools, retrospective coding of existing interventions to accurately characterise their content is becoming more common. However, the use of these tools for retrospective coding poses various challenges, the discussion of which has been neglected to date. This commentary discusses the challenges encountered when retrospectively describing the content of five nationally implemented programmes for type 2 diabetes in the United Kingdom and the Republic of Ireland and suggests recommendations to tackle these challenges. We present important methodological, practical, and ethical considerations for researchers to reflect on, relevant to the retrospective description of existing interventions. Specifically, we discuss (i) the importance of positive relationships and collaboration with intervention stakeholders, (ii) the practical and ethical considerations when analysing the content of implemented interventions, (iii) the independence of research teams and the potential for misclassification of intervention content, and (iv) the challenges associated with the analysis of intervention content using behavioural science tools. There is a growing demand for more robust approaches to address the methodological, practical, and ethical challenges associated with such studies. The present commentary describes key issues to be considered by research teams, as well as concrete recommendations to improve the retrospective characterisation of intervention content.
    In this commentary, we discuss how researchers can best describe the content of existing behavioural interventions. We talk about the challenges we faced when analysing behavioural interventions for type 2 diabetes prevention and management in the United Kingdom and the Republic of Ireland. Specifically, we reflect on the importance of building good relationships and collaborating with those responsible for developing and/or delivering the interventions, important practical and ethical considerations, dealing with research team independence, and using behavioural science tools to guide the analysis of intervention content. We also share what we have learned from these experiences and some ideas on how to tackle these challenges. Our experiences and lessons can offer valuable insights for future analyses of existing interventions.
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  • 文章类型: Journal Article
    已知多种药物会增加有和没有潜在癫痫发作的患者的癫痫发生。矛盾的是,其中一些药物包括抗癫痫药物(ASM)和其他药物,比如精神药物,作用于中枢神经系统(CNS)。本文旨在讨论3例临床病例,这些病例突出了中枢神经系统药物继发的癫痫反应性,包括发作间癫痫样放电(IED)形式的癫痫发作性增加,而没有癫痫发作。与相关的非癫痫性运动障碍的脑电图(EEG)上的癫痫性增加,弗兰克,从头发作。我们还分析了有关中枢神经系统药物对癫痫发生的影响的相关文献。
    Multiple medications are known to increase epileptogenicity in patients with and without an underlying seizure disorder. Paradoxically, some of these medications include anti-seizure medications (ASMs) and other medications, such as psychotropics, that act on the central nervous system (CNS). This article aims to discuss 3 clinical cases that highlight the gamut of epileptogenic reactivity secondary to CNS drugs ranging from increased epileptogenicity in the form of interictal epileptiform discharges (IEDs) without seizures, increased epileptogenicity on electroencephalogram (EEG) with associated non-epileptic movement disorders, and frank, de novo seizures. We also analyze the relevant literature on the impact of CNS medications on epileptogenicity.
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  • 文章类型: Journal Article
    22q11.2微缺失是人类中最常见的微缺失综合征,患病率为每100,000例活产13例,它是具有可变表型表现的多系统条件。
    我们介绍了一例患有Dandy-Walker综合征的成年患者,他到我们的癫痫诊所就诊,出现2年的新发作性癫痫发作和认知能力下降以及1年的精神病症状。
    患者有未发现的自身免疫和恶性肿瘤检查。连续的头皮vEEG研究显示,爆发了1-2Hz的广义前中央优势尖峰或多尖峰和慢波放电。几次肌阵挛性抽搐被时间锁定,全身放电表明皮质肌阵挛性。除了提示Dandy-Walker综合征的发现外,MRI脑部还显示脑室周围结节性异位症。基于阵列的比较基因组杂交显示在22q11.2缺失综合征中看到的22q11.2微缺失。
    我们的案例说明了在成人中诊断遗传性疾病的挑战,特别是当初始诊断依赖于多种因素时,包括病人的年龄,表型特征的严重性,和医生的意识。
    UNASSIGNED: 22q11.2 microdeletion is the most common microdeletion syndrome in humans with a prevalence of 13 per 100 000 live births, and it is a multisystem condition with variable phenotypic presentations.
    UNASSIGNED: We present a case of an adult patient with Dandy-Walker syndrome who presented to our epilepsy clinic with 2 years of new-onset seizures and cognitive decline and 1 year of psychotic symptoms.
    UNASSIGNED: Patient had a non-revealing autoimmune and malignancy work-up. Continuous scalp vEEG study showed bursts of 1-2 Hz generalized fronto-centrally predominant spike or polyspike and slow wave discharges. Several myoclonic jerks were time-locked with the generalized discharges indicative of cortical myoclonus. MRI brain revealed periventricular nodular heterotopia in addition to findings suggestive of Dandy-Walker syndrome. Array-based comparative genomic hybridization demonstrated a 22q11.2 microdeletion seen in 22q11.2 deletion syndrome.
    UNASSIGNED: Our case illustrates the challenges of diagnosing genetic disorders in adults especially when the initial diagnosis is dependent on a number of factors, including the patient\'s age, the severity of the phenotypic features, and the awareness of the physician.
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