Aminophylline increases parasternal muscle action in awake canines

Publication date: Available online 21 February 2019Source: Pulmonary Pharmacology &TherapeuticsAuthor(s): Jenny V. Suneby Jagers, Michael Ji, Bruce Rothwell, Paul A. EastonAbstractThe traditional theophylline bronchodilator, aminophylline, is still widely used, especially in the treatment of COPD. The effects of aminophylline on ventilation and action of the costal diaphragm have been previously defined, but other respiratory muscles – notably the chest wall, are not well determined. Therefore, we investigated the effects of aminophylline on the Parasternal intercostal, a key obligatory inspiratory muscle, examining muscle length, shortening and EMG. We studied 11 awake canines, chronically implanted with sonomicrometer crystals and fine-wire EMG electrodes in the parasternal muscle. Ventilatory parameters, muscle length (shortening), and moving average muscle EMG activity, were measured at baseline and with aminophylline, during resting and hypercapnic stimulated breathing. Experiments were carried out prior to administration of aminophylline (baseline), and 1.5 h after loading and ongoing infusion. Minute ventilation, tidal volume and respiratory frequency all increased significantly with aminophylline, both during resting breathing and at equivalent levels of hypercapnic stimulated breathing. Parasternal baseline muscle length was entirely unchanged with aminophylline. Parasternal shortening increased significantly with aminophylline while corresponding paraste...
Source: Pulmonary Pharmacology and Therapeutics - Category: Respiratory Medicine Source Type: research

Related Links:

Publication date: Available online 20 January 2020Source: Chemico-Biological InteractionsAuthor(s): Xin Nee Tew, Natalie Jia Xin Lau, Dinesh Kumar Chellappan, Thiagarajan Madheswaran, Farrukh Zeeshan, Murtaza M. Tambuwala, Alaa AA. Aljabali, Sri Renukadevi Balusamy, Haribalan Perumalsamy, Gaurav Gupta, Brian G. Oliver, Alan Hsu, Peter Wark, Karosham Reddy, Ridhima Wadhwa, Philip Michael Hansbro, Kamal DuaAbstractInflammatory responses play a remarkable role in the mechanisms of acute and chronic respiratory diseases such as chronic obstructive pulmonary disease (COPD), asthma, pulmonary fibrosis and lung cancer. Currently,...
Source: Chemico Biological Interactions - Category: Biochemistry Source Type: research
ConclusionThe high Metrnl level in COPD exacerbations and active smoking may be important in balancing the inflammatory response. However, plasma Metrnl levels were found to be lower in COPD patients with comorbidities.
Source: Lung - Category: Respiratory Medicine Source Type: research
Authors: Cheng W, Li X, Duan J, Zhou Z, Zhou A, Zhao Y, Zeng Y, Chen Y, Cai S, Chen P Abstract The purposes of this study were to: (1) study the prevalence of pain in patients with mild-to-very severe chronic obstructive pulmonary disease (COPD) in China; (2) compare the differences in pain characteristics between stable COPD and acute exacerbation of COPD (AECOPD); (3) explore the clinical associations with pain in those with COPD. This cross-sectional study was conducted in China from October 24, 2017, to January 11, 2019. A face-to-face interview was conducted to collect data. The Chinese version of the brief pa...
Source: COPD: Journal of Chronic Obstructive Pulmonary Disease - Category: Respiratory Medicine Tags: COPD Source Type: research
Authors: Bade BC, DeRycke EC, Skanderson M, Crothers K, Haskell S, Bean-Mayberry B, Cain HC, Brandt C, Bastian LA, Akgün KM Abstract Pulmonary function testing (PFT) is required to diagnose chronic obstructive pulmonary disease (COPD) but is completed for only 30-50% of patients with the disease. We determined patient factors associated with decreased likelihood for PFT acquisition (i.e. underutilization) in the United States Veterans Affairs (VA) health care system.We performed a retrospective analysis of Veterans who survived a VA-based COPD hospitalization between 2012 and 2015. COPD was identified using In...
Source: COPD: Journal of Chronic Obstructive Pulmonary Disease - Category: Respiratory Medicine Tags: COPD Source Type: research
Authors: Tangirala NC, O'Conor R, Wolf MS, Wisnivesky JP, Federman AD Abstract Regular use of inhaled corticosteroids (ICS) is the standard of care for patients with persistent asthma and chronic obstructive pulmonary disease (COPD). Adherence to ICS is measured using the 10-item Medication Adherence Report Scale (MARS), a self-reported medication adherence assessment. However, data on the validity of this measure are limited. Data were obtained from two cohort studies that examined the association of health literacy with self-management behaviors among adults ages 65 and older with asthma and adults ages 40 and ol...
Source: COPD: Journal of Chronic Obstructive Pulmonary Disease - Category: Respiratory Medicine Tags: COPD Source Type: research
Conclusions: Patients with comorbidities such as chronic obstructive pulmonary disease, obesity, diabetes, and alcoholism are a high-risk group for VAP. Particular attention should be paid to patients admitted to the ICU with multi-organ trauma, fractures, and hemorrhage/hemorrhagic shock as patients predisposed to VAP. There is a need for further research into risk factors for non-modifiable VAP such as comorbidities and reasons for ICU admission in order to allow closer monitoring of these patients for VAP.
Source: International Journal of Environmental Research and Public Health - Category: Environmental Health Authors: Tags: Article Source Type: research
This study describes the long-term comorbidity profile and treatment burden among people with HIV-1 infection.Methods: This retrospective study included Medicaid claims data from patients with ≥1 antiretroviral (ARV) claim between 2016 and 2017 (most recent claim defined the index date), ≥1 HIV diagnosis within 1 year before index, age ≥18 years at first HIV diagnosis and
Source: Current Medical Research and Opinion - Category: Research Tags: Curr Med Res Opin Source Type: research
Photo credit Chrstian Newman Dear Carol: My mom is 85 and has lived with COPD, diabetes and heart disease for the last 10 years, but she’s been a fighter. She’s always said that she didn’t want extreme measures to keep her alive when her time to go was obvious, and I agreed, but now that the end seems close, I think that she should fight longer. She qualifies for hospice, but hospice means that she has to stop the medications that are keeping her alive. Mom says that she’s fought long enough and she’s done with that. She just wants comfort for as long as she has left. It’s true that...
Source: Minding Our Elders - Category: Geriatrics Authors: Source Type: blogs
Condition:   Asthma Copd Intervention:   Drug: Formoterol 12mcg + budesonide 400mcg / Formoterol 6mcg + budesonide 200mcg Sponsor:   Eurofarma Laboratorios S.A. Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Condition:   Chronic Obstructive Respiratory Diseases Intervention:   Other: Therapeutic strategy Sponsor:   Olivier Michel Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
More News: Chronic Obstructive Pulmonary | Drugs & Pharmacology | Respiratory Medicine