View clinical trials related to Respiratory System.
Filter by:This is a randomized controlled human exposure crossover study. Investigators aims to assess the acute effects of low temperature exposure and the underlying mechanisms.
This is a randomized controlled human exposure crossover study. Investigators aims to assess the acute effects of high temperature exposure and the underlying mechanisms.
Randomized controlled field trial of a probiotics to assess its roles in the prevention or improvement of constipation and diarrhea, acute respiratory infection, nutrition improving in Vietnam children. In the present proposal, the investigators plan to examine if daily intake of a probiotic beverage, which includes 6.5 billion probiotic Lactobacilli, has a beneficial role in protecting children from infectious diarrhea and constipation in Vietnam with 3 objectives: 1. To assess the impact of probiotics in the prevention or improvement of diarrhea and constipation in children 2. To assess the impact of probiotics in the prevention of disease of respiratory system (ARI) 3. To assess the impact of probiotics on nutrition and growth of the children
The increasing incidence of chronic respiratory diseases is a public health problem affecting hundreds of thousands of people around the world, including children. Directly exposed to atmospheric aerocontaminants (pollution, allergens), the respiratory tracts represent a complex ecosystem that involves different cells that develop complex interactions with the surrounding connective tissue but also with their rich immune environment and with the microbiota. Although a pathophysiological continuum is postulated between the nasal and bronchial airways in certain diseases, such as allergic diseases, we have identified broad gradients in gene expression between nasal and bronchial samples. This is why cellular variability throughout the respiratory tree needs to be studied in detail. The sequencing of RNAs specifically present in a particular cell, and its comparison with neighboring cells, allows us to document precise cellular contributions and intercellular relationships. Our project will establish protocols to stabilize airway swabs by brushing and/or biopsy, under conditions that will then allow the analysis of gene expression profiles at the single cell level (single cell RNA sequencing). The development of the "single cell" stabilisation and analysis protocol will first be carried out on primary respiratory epithelium cultures and then extended to respiratory specimens taken from healthy volunteers. Through sampling at several levels of the respiratory tree, variations in expression along the tracheobronchial axis will be fully documented. Finally, the interaction between the epithelial compartment and the immunological compartment will be studied by analyzing gene expression on a single cell in different physiopathological contexts.
This study aims to assess the effects of acute exposure to traffic-related air pollution and the underlying mechanisms.
This study aims to evaluate whether dietary supplementation with fish oil can protect against the cardiopulmonary effects induced by ozone exposure.
The increasing incidence of chronic respiratory diseases is a public health problem affecting hundreds of thousands of people around the world, including children. Directly exposed to atmospheric aerocontaminants (pollution, allergens), the respiratory tracts represent a complex ecosystem that involves different cells that develop complex interactions with the surrounding connective tissue but also with their rich immune environment and with the microbiota. Although a pathophysiological continuum is postulated between the nasal and bronchial airways in certain diseases, such as allergic diseases, we have identified broad gradients in gene expression between nasal and bronchial samples. This is why cellular variability throughout the respiratory tree needs to be studied in detail. The sequencing of RNAs specifically present in a particular cell, and its comparison with neighboring cells, allows us to document precise cellular contributions and intercellular relationships. Our project will establish protocols to stabilize airway swabs by brushing and/or biopsy, under conditions that will then allow the analysis of gene expression profiles at the single cell level (single cell RNA sequencing). The development of the "single cell" stabilisation and analysis protocol will first be carried out on primary respiratory epithelium cultures and then extended to respiratory specimens taken from healthy volunteers. Through sampling at several levels of the respiratory tree, variations in expression along the tracheobronchial axis will be fully documented. Finally, the interaction between the epithelial compartment and the immunological compartment will be studied by analyzing gene expression on a single cell in different physiopathological contexts.
The methodology is a feasibility study to determine the feasibility of assessing people in the community with a neurological condition before proceeding towards a full powered community trial evaluating the influence of intrathecal baclofen.
The purpose of this study is to characterize variability and extent of the deposition of ciprofloxacin in the respiratory tract of healthy subjects in comparison to patients with chronic lung diseases after inhalation of a single 50 mg dry powder dose containing 32 mg active substance. In addition the safety and pharmacokinetics of ciprofloxacin will be evaluated. In this study the radiolabeled substance will be administered and scintigraphy imaging techniques will be used to demonstrate the lung deposition visually. In the healthy subjects an additional pharmacokinetic method is used to calculate lung deposition indirectly based on pharmacokinetic data derived from plasma. For this purpose they will inhale at a separate occasion another dose of ciprofloxacin after having ingested activated charcoal. The latter serves to bind ciprofloxacin which is swallowed down during the inhalation maneuver in the gastrointestinal (GI) tract, thus preventing its uptake into the blood (charcoal block). Safety investigations will focus on local tolerability in the lung. Pharmacokinetics is to see how the body absorbs, distributes, breaks down and gets rid of the study drug. Results from this study will be used to show how the drug is distributed in the human lung.