PREDICTORS OF RESPONSE TO BRONCHIAL THERMOPLASTY IN SEVERE ASTHMA

严重哮喘支气管热成形术反应的预测因素

• 批准号: 9034407
• 负责人: Ajay Sheshadri
• 金额: $ 15.36万
• 依托单位: UNIVERSITY OF TX MD ANDERSON CAN CTR
• 依托单位国家: 美国
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-03-01 至 2021-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9034407
• 关键词: Accounting; Address; Adrenal Cortex Hormones; Adverse effects; Affect; Air; Alternative Therapies; Asthma; Breathing; Bronchial Provocation Tests; Bronchoconstriction; Bronchodilator Agents; Bronchoscopy; Characteristics; Chest; Clinical; Clinical Investigator; Clinical Medicine; Clinical Research; Clinical/Radiologic; Critical Care; Defect; Densitometry; Devices; Dose; Emergency department visit; Enrollment; Environmental air flow; Exhalation; Fibrosis; Gases; Goals; Health Expenditures; Helium; Hyperplasia; Hypertrophy; Image; Image Analysis; Imaging Techniques; Inflammation; Internal Medicine; Investigation; Literature; Lung; Magnetic Resonance Imaging; Measurement; Measures; Medicine; Methods; Morbidity - disease rate; Nitric Oxide; Obstructive Lung Diseases; Oral; Patient-Focused Outcomes; Patients; Peak Expiratory Flow; Phase; Phenotype; Population; Protocols documentation; Public Health; Pulmonary function tests; Quality of life; Randomized; Research; Research Personnel; Research Training; Resources; Respiratory physiology; Risk; Safety; Severities; Sputum; Steroids; Testing; Therapeutic; Thick; Training; United States; Work; X-Ray Computed Tomography; adverse outcome; airway inflammation; airway remodeling; asthmatic; asthmatic patient; base; career; clinical predictors; cohort; control trial; conventional therapy; cost; experience; health care service utilization; high risk; imaging modality; improved; insight; methacholine; morphometry; muscle form; novel; novel therapeutics; predicting response; prospective; public health relevance; pulmonary function; quantitative imaging; radiofrequency; respiratory smooth muscle; responders and non-responders; response; small airways disease; tool

 DESCRIPTION (provided by applicant): This proposal describes a five-year research and training plan that will facilitate the transition of Dr. Ajay Sheshadri, MD to an independent academic researcher. Ajay has a strong background in clinical research and medicine and has completed post-graduate training in Internal Medicine and Pulmonary/Critical Care Medicine. The primary goal of this proposal is to provide the framework and support necessary for Dr. Sheshadri to fulfill his career goals as a clinical investigator through transition to independent scientific investigation in the use of advanced imaging in obstructive airway diseases. The proposed research plan will focus on a patient-based approach to identifying clinical and imaging predictors of response to bronchial thermoplasty in severe asthma. Bronchial thermoplasty is a novel device-based therapy that decreases airway smooth muscle through the use of radiofrequency energy in severe asthma, decreasing exacerbation rates and improving quality of life. The proposed study will enroll patients with severe asthma over three years and characterize them in detail using multiple clinical and novel imaging modalities. These variables will then be used to determine predictors of response to bronchial thermoplasty as defined by a reduction in corticosteroid dose or improvement in asthma- specific quality of life. Aim 1 focuses on identifying clinical predictors of response to bronchial thermoplasty by measuring the following before and 12 months after bronchial thermoplasty: pulmonary function tests, methacholine bronchoprovocation, sputum inflammation, exhaled nitric oxide, asthma-specific quality of life, asthma control, oral and inhaled steroid dose, and healthcare utilization. This clinical characterization of subjects will help us test the hypothesis that patients with lower baseline quality of life are more likely to have a reduction in oral or inhaled steroid dose after bronchial thermoplasty. Aim 2 focuses on the use of novel quantitative measures of airway wall thickness and lung densitometry to determine predictors of improvement in quality of life after bronchial thermoplasty. This imaging characterization of subjects will help us test the hypothesis that patients with more small airway disease, as measured by increased air trapping on CT, are less likely to have an adequate response to bronchial thermoplasty. Our extensive experience in standardizing imaging acquisition and analysis for use in quantitative studies of severe asthma allow for high-fidelity analyses of imaging predictors of response to bronchial thermoplasty that have not been described in the literature. Together, these aims will allow for an extensive characterization of patients with severe asthma with the goal of revealing responder and non-responder phenotypes to predict response to a specific therapy. The proposed application will allow Dr. Sheshadri to develop a high-level research career focused on developing novel quantitative imaging techniques to augment phenotypic characterization of obstructive airway diseases.

 描述（由申请人提供）：该提案描述了一项为期五年的研究和培训计划，该计划将促进医学博士 Ajay Sheshadri 转变为独立学术研究员，Ajay 在临床研究和医学方面拥有深厚的背景，并已完成职位。 - 内科和肺/重症监护医学研究生培训 该提案的主要目标是为 Sheshadri 博士提供必要的框架和支持，以实现其作为临床研究者的职业目标，过渡到独立科学研究的使用。高级成像拟议的研究计划将重点关注基于患者的方法，以确定严重哮喘中支气管热成形术反应的临床和影像学预测因子。支气管热成形术是一种基于设备的新型疗法，通过使用射频来减少气道平滑肌。拟议的研究将招募三年以上的严重哮喘患者，并使用多种临床和新颖的成像方式详细描述他们的特征。确定支气管热成形术反应的预测因子（定义为皮质类固醇剂量的减少或哮喘特定生活质量的改善） 目标 1 的重点是通过在支气管热成形术之前和之后 12 个月测量以下指标来确定支气管热成形术反应的临床预测因子：肺功能检查、乙酰甲胆碱支气管激发、痰炎症、呼出一氧化氮、哮喘特异性生活质量、哮喘控制、口腔和吸入类固醇剂量和医疗保健利用。受试者的这种临床特征将帮助我们检验以下假设：基线生活质量较低的患者在支气管热成形术后更有可能减少口服或吸入类固醇剂量。气道壁厚度和肺密度测定的新颖定量测量，以确定支气管热成形术后生活质量改善的预测因素，受试者的这种成像特征将帮助我们检验以下假设：患者气道较小。通过 CT 上空气滞留的增加来衡量，疾病不太可能对支气管热成形术产生足够的反应。我们在标准化成像采集和分析以用于严重哮喘的定量研究方面拥有丰富的经验，可以对疾病的成像预测因子进行高保真度分析。文献中尚未描述的对支气管热成形术的反应，这些目标将允许对严重哮喘患者进行广泛的表征，目的是揭示反应者和非反应者表型，以预测对特定治疗的反应。该应用将使 Sheshadri 博士能够发展高水平的研究生涯，专注于开发新颖的定量成像技术，以增强阻塞性气道疾病的表型特征。