Preclinical

临床前
  • 文章类型: Journal Article
    目的:克罗恩病(CD)是一种导致累积肠损伤的进行性疾病。Lémann指数是一种经过验证的工具,可以帮助监测疾病的进展并评估不同疗法的有效性。我们的目的是描述偶然诊断的CD的主要放射学发现,并与晚期诊断的患者相比,评估该亚组的肠损伤。
    方法:将在结直肠癌筛查计划中偶然诊断为CD的患者与对照组进行比较,对照组在有症状发作后诊断为CD,疾病程度为1:1。所有横断面检查均集中阅读,对莱曼指数的主要发现和计算进行描述性分析。
    结果:包括38例患者:19例患有临床前CD(中位年龄55岁(IQR,54-62),53%男性,74%不吸烟者;74%B1和26%B2)和19个有症状CD的匹配对照。在那些有临床前CD的人中,MRE上最常见的透壁发现是对比增强(79%),壁厚(79%),其次是淋巴结肿大(68%),水肿(42%),血管分布增加(42%)。在那些有狭窄的人中,对照组显示出较高的孕前扩张率(100%vs.0%,p=0.01)。肠损伤评估显示,临床前CD和对照组之间的Lémann指数没有统计学上的显着差异(p=0.95)。在结肠/直肠评分中观察到统计学上显著较高的评分(p=0.014)。
    结论:临床前CD患者表现出与新发症状CD相似的放射学表现和肠损伤程度。
    OBJECTIVE: Crohn\'s disease (CD) is a progressive disorder leading to cumulative bowel damage. The Lémann index is a validated tool that can help in monitoring the progression of the disease and evaluating the effectiveness of different therapies. Our aim was to describe the main radiological findings in incidentally diagnosed CD and to evaluate bowel damage in this subgroup compared to patients diagnosed at later stages.
    METHODS: Patients with an incidental diagnosis of CD during the colorectal cancer screening program were compared to controls with a CD cohort diagnosed after symptomatic onset and matched 1:1 by disease extent. All cross-sectional examinations were centrally read, performing a descriptive analysis of the main findings and calculation of Lémann index.
    RESULTS: Thirty-eight patients were included: 19 with preclinical CD (median age 55 years (IQR, 54-62), 53% male, 74% non-smokers; 74% B1 and 26% B2) and 19 matched-controls with symptomatic CD. In those with preclinical CD, the most frequent transmural findings on MRE were contrast enhancement (79%), wall thickening (79%), followed by lymphadenopathy (68%), edema (42%), and increased vascularity (42%). Among those with strictures, controls showed a higher rate of preestenotic dilation (100% vs. 0%, p = 0.01). Bowel damage assessment revealed no statistically significant differences in the Lémann index between preclinical CD and controls (p = 0.95). A statistically significant higher score in the colonic/rectum score was observed (p = 0.014).
    CONCLUSIONS: Patients with preclinical CD demonstrate similar radiological findings and degree of bowel damage as new-onset symptomatic CD.
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  • 文章类型: Journal Article
    目的:医生经常觉得他们没有能力为女同性恋服务,同性恋,双性恋,和酷儿(LGBTQ)社区,但是,将将LGBTQ内容和观点纳入已经浓缩的医学院课程的教育是具有挑战性的。我们开发了LGBTQ护理中辅助生殖技术(ART)的临床前主动学习模块,将临床和基础科学内容与患者观点相结合。
    方法:我们创建了一个模块,将基于病例的小组讨论与患者小组相结合。我们与通过ART构思的女性顺式同性伴侣合作开发了一个案例进行讨论。同对夫妇的患者小组进行了讨论。所有一年级医学生都参加了该模块的两个部分。在参与之前,学生通过讲座学习生殖内分泌学和遗传学概念。在模块之后,学生自愿完成了一项匿名调查,以评估对LGBTQ患者的熟悉度和信心以及对模块的满意度的自我感知变化。
    结果:在参加的126名学生中,72(57%)完成了调查。其中,69(95.8%)认为该模块为他们提供了更好的LGBTQ患者体验视角,66至69(92-96%)同意小小组讨论实现了其关于LGBTQ健康障碍和ART应用的学习目标。学生重视患者小组(84.7%),并认为更好地理解LGBTQ患者的生殖障碍是其最有价值的观点。
    结论:在现实生活中的LGBTQ患者体验的背景下,将基于病例的小组讨论和ART患者小组相结合,为学生提供了整合基础科学和临床科学知识的机会,以反映该患者人群的医疗保健需求。与同性伴侣合作创建案例,并让他们展示自己的经验,为学生提供了关于生殖保健问题的真实观点,以及它们如何影响LGBTQ社区成员。
    OBJECTIVE: Physicians often feel they are not equipped to serve the lesbian, gay, bisexual, and queer (LGBTQ) community, but integrating education that incorporates LGBTQ content and perspective into an already-condensed medical school curriculum is challenging. We developed a preclinical active learning module on assisted reproductive technologies (ART) in LGBTQ care, integrating clinical and basic science content with patient perspective.
    METHODS: We created a module that combined a case-based small group discussion with a patient panel. We developed a case for discussion in collaboration with a female cis-gender same-sex couple who conceived through ART. A patient panel with the same couple followed the discussion. All first-year medical students attended both parts of the module. Prior to participation, students learned reproductive endocrinology and genetics concepts through lectures. After the module, students voluntarily completed an anonymous survey to evaluate self-perceived changes in familiarity and confidence with LGBTQ patients and satisfaction with the module.
    RESULTS: Of the 126 students who attended, 72 (57%) completed the survey. Of these, 69 (95.8%) felt the module gave them better perspectives on LGBTQ patient experiences, and 66 to 69 (92-96%) agreed the small group discussion achieved its learning objectives on LGBTQ health barriers and the application of ART. Students valued the patient panel (84.7%) and cited a better understanding of reproductive barriers for LGBTQ patients as its most valuable point.
    CONCLUSIONS: A preclerkship module combining a case-based small group discussion and patient panel on ART delivered in the context of a real-life LGBTQ patient experience provided an opportunity for the students to integrate basic science and clinical science knowledge to reflect on the healthcare needs of this patient population. Creating the case in collaboration with the same-sex couple and having them present their own experience provided an authentic perspective to students on reproductive healthcare issues and how they impact members of the LGBTQ community.
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  • 文章类型: Journal Article
    国际抗癫痫联盟/美国癫痫学会(ILAE/AES)联合转化工作组发起了TASK3工作组,为临床前癫痫研究的各个方面创建通用数据元素(CDE)。这可以帮助提高实验设计的标准化。本文讨论了啮齿动物癫痫模型中与癫痫发作和癫痫相关的神经病理变化。我们讨论CDE用于神经变性的组织病理学参数,星形胶质细胞形态和功能的变化,炎症的机制,以及大鼠和小鼠反复发作导致的血脑屏障和髓磷脂/少突胶质细胞的变化。我们提供详细的CDE表和病例报告表(CRF),有了这份伴随的手稿,我们讨论了个别神经病理学检查的基本原理和方法学方面。CDEs,CRFs,所有研究人员都可以获得配套论文,它们的使用将有利于转化性临床前癫痫研究的协调性和可比性。最终的希望是促进治疗癫痫的理性治疗概念的发展,癫痫发作,和合并症以及评估疾病病理状态的生物标志物的发展。
    The International League Against Epilepsy/American Epilepsy Society (ILAE/AES) Joint Translational Task Force initiated the TASK3 working group to create common data elements (CDEs) for various aspects of preclinical epilepsy research studies, which could help improve the standardization of experimental designs. This article addresses neuropathological changes associated with seizures and epilepsy in rodent models of epilepsy. We discuss CDEs for histopathological parameters for neurodegeneration, changes in astrocyte morphology and function, mechanisms of inflammation, and changes in the blood-brain barrier and myelin/oligodendrocytes resulting from recurrent seizures in rats and mice. We provide detailed CDE tables and case report forms (CRFs), and with this companion manuscript, we discuss the rationale and methodological aspects of individual neuropathological examinations. The CDEs, CRFs, and companion paper are available to all researchers, and their use will benefit the harmonization and comparability of translational preclinical epilepsy research. The ultimate hope is to facilitate the development of rational therapy concepts for treating epilepsies, seizures, and comorbidities and the development of biomarkers assessing the pathological state of the disease.
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  • 文章类型: Journal Article
    背景:淀粉样蛋白β(Aβ)病理是阿尔茨海默病的早期标志。在这里,我们评估了认知能力下降的纵向自我和信息报告的价值,以预测认知未受损的中年人的Aβ正电子发射断层扫描(PET)结果。
    方法:来自ALFA+研究的261名参与者同时接受了[18F]氟美他莫PET和主观认知下降问卷(SCD-Q),扫描前3年。我们使用逻辑回归来评估SCD-Q评分(自我和线人)预测AβPET视觉读数的能力,和重复的方差分析,以评估SCD-Q评分的变化是否与Aβ状态有关。
    结果:记忆力下降的自我感知(优势比[OR]=1.2),和线人对高管衰退的感知(OR=1.6),增加了阳性扫描的概率。信息报告在扫描前3年预测AβPET结果。自我报告的高管下降的纵向增加是女性Aβ的预测因素(P=0.003)。
    结论:认知能力下降的主观报告有助于预测Aβ,并可能改善招募策略。
    BACKGROUND: Amyloid beta (Aβ) pathology is an Alzheimer\'s disease early hallmark. Here we assess the value of longitudinal self- and informant reports of cognitive decline to predict Aβ positron emission tomography (PET) outcome in cognitively unimpaired middle-aged individuals.
    METHODS: A total of 261 participants from the ALFA+ study underwent [18F]flutemetamol PET and Subjective Cognitive Decline Questionnaire (SCD-Q) concurrently, and 3 years before scan. We used logistic regressions to evaluate the ability of SCD-Q scores (self and informant) to predict Aβ PET visual read, and repeated analysis of variance to assess whether changes in SCD-Q scores relate to Aβ status.
    RESULTS: Self-perception of decline in memory (odds ratio [OR] = 1.2), and informant perception of executive decline (OR = 1.6), increased the probability of a positive scan. Informant reports 3 years before scanning predicted Aβ PET outcome. Longitudinal increase of self-reported executive decline was predictive of Aβ in women (P = .003).
    CONCLUSIONS: Subjective reports of cognitive decline are useful to predict Aβ and may improve recruitment strategies.
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  • 文章类型: Case Reports
    Here, we report a 74-year-old woman with a long history of schizophrenia but no clinical manifestation of dementia. Cause of death after autopsy was atherosclerotic heart disease. Although neuropathological investigation showed no significant brain atrophy, superficial microvacuolation with neuronal loss was restrictedly detected in the right anterior cingulate gyrus by microscopic examination. Pick bodies (PBs) positive for Bodian and Bielshowsky staining and 3-repeat-tau were detected in frontal and temporal lobes and limbic regions. Prevalence of PBs was most frequent in the right anterior cingulate gyrus and lateral base, followed by other neocortical regions of the frontal lobe, amygdala, and granular layer of the hippocampus. Although the number of glial inclusions was low, ramified astrocytes and various forms of astrocytes with AT8-positive inclusions were also found. Thus, the case may reflect preclinical or very early clinical Pick disease. Distribution of PBs does not necessarily have to be consistent with previously reported preclinical/early clinical Pick disease. These results show that tau pathology in the earlier stage of Pick disease may be heterogeneous, and the anterior cingulate gyrus may be initially affected in Pick disease. Neuropathological examination, including immunohistochemistry without case selection, is useful in identifying clinical and pathological manifestations of Pick disease.
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  • 文章类型: Journal Article
    UNASSIGNED: The session was designed as part of a yearlong elective within the Association of American Medical Colleges\' Education in Pediatrics Across the Continuum (EPAC) pilot at the University of California, San Francisco. The EPAC pilot aims for longitudinal pediatric education across the medical school and pediatric residency years, with specific emphasis on competency-based advancement. The goal of the elective is to cultivate students\' early interest in pediatrics.
    UNASSIGNED: This is an interactive case-based session for medical students on the clinical presentation and initial evaluation of adolescent depression. We developed this session based on an informal needs assessment at our local institution as well as prior research documenting the minimal time allocated to child and adolescent psychiatry in medical school curricula. The 80-minute interactive case-based format integrates knowledge and clinical experiences while requiring minimal equipment and preparation.
    UNASSIGNED: The session was administered at the University of California, San Francisco, in 2015 to 22 students. Fourteen participants completed evaluation questions (64% response rate). Of responders, 92%-100% thought the session was very or extremely effective at meeting the stated objectives, was interactive, had appropriate time allocated, and was very or extremely helpful at reinforcing objectives from the medical school curriculum. Thirteen participants completed postsession knowledge acquisition questions and performed better than controls (90% vs. 75%), but the difference was not statistically significant.
    UNASSIGNED: Other medical schools could easily administer this session as presented or adapt it to a different target audience or for different time constraints. It is an effective, interactive, well-paced, and helpful means of introducing to medical students a topic that is relevant for anyone going into pediatrics. Likewise, it helps to rectify the lack of child and adolescent psychiatry content in most medical school programs, and it aligns with the movement in undergraduate medical education towards more clinically integrated, inquiry-based curricula with attention to professional development.
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  • 文章类型: Journal Article
    Although there are many examples of autoantibodies in disease-free individuals, they can be a preclinical phenomenon heralding future autoimmune rheumatic disease. They may be a marker for autoreactive B-cell activation and other inflammatory autoimmune processes. The increased prevalence of cardiovascular disease (CVD) in autoimmune rheumatic diseases such as rheumatoid arthritis and systemic lupus erythematosus, and the increased risk of CVD in patients with rheumatic disease with autoantibodies, suggest that CVD may have autoimmune features. Autoantibodies might be risk markers for subclinical and clinical CVD development not only in patients with rheumatic diseases but in the general population as well.
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