Track topics on Twitter Track topics that are important to you
The purpose of this study is to determine whether the lungs of individuals with chronic obstructive pulmonary disease (COPD) contain resident memory T lymphocytes that can produce a combination of cytokines that induce the symptoms of an acute exacerbation of COPD (AE-COPD). Specifically, the study will determine cell-surface receptors of lung T cells in comparison with blood T cells from the same subject, and will examine anti-CD3-activated blood or lung T cells for interleukin (IL)-6 and interferon-gamma production in response to IL-18, and for IL-17A production in response to recombinant IL-23.
COPD is one of the most pressing healthcare problems facing our nation. AE-COPD is responsible for the bulk of healthcare costs, and much of the morbidity and decline in health status among individuals with this common disease. The lack of accepted animal models of AE-COPD necessitates novel approaches using human samples. Advances in the understanding of the pathogenesis have been slowed, in part, due to controversy as to how exacerbations should be defined. The prevailing paradigm has defined AE-COPD as event-based. Such definitions clearly identify groups of patients with accelerated loss of pulmonary function and increased mortality. However, limited data show that symptom-based definitions of AE-COPD also capture episodes inducing significant morbidity and functional decline, and hence of concern to patients. Fundamental mechanisms are lacking to explain AE-COPD defined by either means.
Controversy also surrounds triggers of AE-COPD. Bacteria and viruses are involved in some episodes, but the relative importance of each is intertwined with disputes over the definition of AE-COPD. Progress at linking specific pathogens to molecular pathogenesis has been slow, both due to their diversity, and to the high rates of bacterial colonization of patients with COPD, even in the stable state. Moreover, in many AE-COPD cases, no pathogen can be identified. Without negating the value of analyzing infections with specific species of pathogens, it appears that progress in molecular pathogenesis could be accelerated by focusing on unifying features of the pulmonary immune response during AE-COPD.
The research protocol involves isolating lung lymphocytes from surgical specimens of patients already undergoing clinically indicated lung resections. Surgical lung resections may be performed either by open thoracotomy or by video-assisted thoracoscopic surgery (VATS), and could include pneumonectomies, lobectomies, or wedge-excisions, as dictated by clinical care of the patient. This protocol will exclusively use tissue that is of excess after a clinical diagnosis is established. The setting is the operating rooms at the Ann Arbor VA Hospital or the University of Michigan Hospital System. Subjects will be recruited from the outpatient clinics, but will be inpatients at the time of surgery.
Subjects will not undergo any additional procedures beyond routine clinical care as a result of participating in this protocol. However, it is anticipated that the study will have access to the medical record to extract results of demographic data, including occupational exposures and smoking history, pulmonary function testing, and results of imaging and other staging studies.
Observational Model: Case-Only, Time Perspective: Prospective
Pulmonary Disease, Chronic Obstructive
University of Michigan at Ann Arbor
National Heart, Lung, and Blood Institute (NHLBI)
Published on BioPortfolio: 2014-08-27T03:46:32-0400
Chronic obstructive pulmonary disease (COPD) is a chronic condition involving an impairment in functionality and in the execution of activities of daily life. The hypothesis of this study ...
Chronic obstructive pulmonary disease is characterized by obstruction to pulmonary airflow and dyspnea. These characteristics are a consequence of exposure to harmful gases and particles t...
GSK233705 is a high-affinity specific muscarinic receptor (mAChR) antagonist which is being developed for once daily treatment of chronic obstructive pulmonary disease (COPD). The long du...
Chronic obstructive pulmonary disease is a leading cause of mortality worldwide. It is a systemic disease which includes pulmonary, cardiac, muscular, digestive and cognitive impairments....
The goal of the study is to look at how genes and certain chemicals in the body are related to depression and chronic obstructive pulmonary disease.
The combined impact of chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) on cardiovascular outcomes remains controversial.
In exacerbations of chronic obstructive pulmonary disease, administration of high concentrations of oxygen may cause hypercapnia and increase mortality compared with oxygen titrated, if required, to a...
Despite real needs, very few chronic obstructive pulmonary disease (COPD) patients with life-limiting disease receive a well-organized support for palliative care (PC).
Chronic obstructive pulmonary disease is a common respiratory condition that presents in varying degrees of severity and can be complicated by further co-morbidities. Up to a third can also have pulmo...
The chronic obstructive pulmonary disease is a preventable entity, when it develops the patient suffers severe complications, with a high economic impact for the patient and for health services.
A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.
Hypertrophy and dilation of the RIGHT VENTRICLE of the heart that is caused by PULMONARY HYPERTENSION. This condition is often associated with pulmonary parenchymal or vascular diseases, such as CHRONIC OBSTRUCTIVE PULMONARY DISEASE and PULMONARY EMBOLISM.
A subcategory of CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The disease is characterized by hypersecretion of mucus accompanied by a chronic (more than 3 months in 2 consecutive years) productive cough. Infectious agents are a major cause of chronic bronchitis.
A scopolamine derivative and CHOLINERGIC ANTAGONIST that functions as a BRONCHODILATOR AGENT. It is used in the treatment of CHRONIC OBSTRUCTIVE PULMONARY DISEASE.
An ADRENERGIC BETA-2 RECEPTOR AGONIST with a prolonged duration of action. It is used to manage ASTHMA and in the treatment of CHRONIC OBSTRUCTIVE PULMONARY DISEASE.
Pulmonary relating to or associated with the lungs eg Asthma, chronic bronchitis, emphysema, COPD, Cystic Fibrosis, Influenza, Lung Cancer, Pneumonia, Pulmonary Arterial Hypertension, Sleep Disorders etc Follow and track Lung Cancer News ...
COPD (chronic obstructive pulmonary disease)
COPD (chronic obstructive pulmonary disease) is used for a number of conditions including chronic bronchitis and emphysema, which all lead to the airways in the lungs becoming damaged and thus narrower, making inhalation and exhalation harder...
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells. In vertebrates, it is composed of blo...