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L'essentiel de la littérature réçente en Pneumologie

Dans cette rubrique on vous propose une revue de la littérature à travers une sélection d'abstracts d'articles originaux.
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Immunomodulatory Effects of Ambroxol on Airway Hyperresponsiveness and Inflammation. Imprimer Envoyer
Lundi, 27 Juin 2016 06:12

Ambroxol is used in COPD and asthma to increase mucociliary clearance and regulate surfactant levels, perhaps through anti-oxidant and anti-inflammatory activities. To determine the role and effect of ambroxol in an experimental model of asthma, BALB/c mice were sensitized to ovalbumin (OVA) followed by 3 days of challenge.

Airway hyperresponsiveness (AHR), lung cell composition and histology, and cytokine and protein carbonyl levels in bronchoalveolar lavage (BAL) fluid were determined. Ambroxol was administered either before the first OVA challenge or was begun after the last allergen challenge. Cytokine production levels from lung mononuclear cells (Lung MNCs) or alveolar macrophages (AM) were also determined. Administration of ambroxol prior to challenge suppressed AHR, airway eosinophilia, goblet cell metaplasia, and reduced inflammation in subepithelial regions. When given after challenge, AHR was suppressed but without effects on eosinophil numbers. Levels of IL-5 and IL-13 in BAL fluid were decreased when the drug was given prior to challenge; when given after challenge, increased levels of IL-10 and IL-12 were detected. Decreased levels of protein carbonyls were detected in BAL fluid following ambroxol treatment after challenge. In vitro, ambroxol increased levels of IL-10, IFN-γ, and IL-12 from Lung MNCs and AM, whereas IL-4, IL-5, and IL-13 production was not altered.

Taken together, ambroxol was effective in preventing AHR and airway inflammation through upregulation of Th1 cytokines and protection from oxidative stress in the airways.

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What is asthma-COPD overlap syndrome? Towards a consensus definition from a round table discussion. Imprimer Envoyer
Lundi, 27 Juin 2016 06:12
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Patients with asthma-chronic obstructive pulmonary disease overlap syndrome (ACOS) have been largely excluded from pivotal therapeutic trials and, as a result, its treatment remains poorly defined and lacking firm evidence. To date, there is no universally accepted definition of ACOS, which has made it difficult to understand its epidemiology or pathophysiology.

Despite many uncertainties, there is emerging agreement that some of the key features of ACOS include persistent airflow limitation in symptomatic individuals 40 years of age and older, a well-documented history of asthma in childhood or early adulthood and a significant exposure history to cigarette or biomass smoke.

In this perspective, we propose a case definition of ACOS that incorporates these key features in a parsimonious algorithm that may enable clinicians to better diagnose patients with ACOS and most importantly enable researchers to design therapeutic and clinical studies to elucidate its epidemiology and pathophysiology and to ascertain its optimal management strategies.

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The Level of Cholesterol in COPD Patients with Severe and Very Severe Stage of the Disease. Imprimer Envoyer
Lundi, 27 Juin 2016 06:12
Related Articles


BACKGROUND: High blood cholesterol is part of metabolic syndrome and can be caused by medical conditions or bad dietary habits.
AIM: The aim of the study was to investigate the prevalence of hypercholesterolemia in privies diagnosed patients with the severe and very severe stage of COPD, which were stable.

MATERIAL AND METHODS: We investigated 100 subjects, all of them smokers, with smoking status >10 years, stratified into two groups: with severe and very severe stage of the disease. It was clinical, randomized, cross-sectional study. Besides demographic parameters and functional parameters, body mass index, cholesterol, LDL, and HDL were investigated.

RESULTS: In the group of patients with very severe COPD were recorded significantly higher average values of cholesterol (6.16 ± 1.5 vs. 5.61 ± 1.1, p = 0.039). As independent significant factors influencing cholesterol in the group with a very severe COPD were confirmed the age of the patients (p = 0.005), LDL (p = 0.004) and HDL (p = 0.002). In the group with severe COPD, only LDL was confirmed as an independent significant factor that has an impact on cholesterol (p < 0.0001).

CONCLUSION: The results of our survey demonstrated a high level of blood cholesterol and LDL, and low level of blood HDL in both investigated group's patients with COPD.

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