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Related Concept Videos

Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
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Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

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Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
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Asthma-I: Introduction01:29

Asthma-I: Introduction

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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
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Related Experiment Video

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Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Microbiota associations with inflammatory pathways in asthma.

Juan Wang1, Jianmin Chai2, Linlin Zhang1

  • 1Department of Respiratory and Critical Care Medicine, Peking University Third Hospital, Beijing, China.

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|December 28, 2021
PubMed
Summary
This summary is machine-generated.

The airway microbiota in asthma patients differs significantly from healthy individuals, forming distinct community types (pulmotypes) linked to inflammatory phenotypes and clinical characteristics.

Keywords:
asthmalung microbiotasubtypes

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Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
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Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
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Area of Science:

  • Microbiology
  • Pulmonology
  • Immunology

Background:

  • The airway microbiota is crucial in asthma pathophysiology.
  • The link between airway microbiota and asthma phenotypes remains unclear.

Purpose of the Study:

  • Characterize airway microbiota in asthma patients.
  • Correlate microbiota with inflammatory phenotypes and clinical traits.

Main Methods:

  • 16S rDNA gene sequencing of induced sputum from asthma patients.
  • Delineation of microbiota community types (pulmotypes) using DMM models.

Main Results:

  • Asthma patients showed altered bacterial abundance (increased Bacteroidetes, Fusobacteria, Proteobacteria; decreased Firmicutes, Actinobacteria) vs. controls.
  • Three distinct asthma pulmotypes (P1, P2, P3) were identified.
  • Pulmotype 1 (P1) associated with older age and lower TGF levels; Pulmotype 3 (P3) with lower eosinophils and higher neutrophils.

Conclusions:

  • Distinct asthma-associated airway microbiota pulmotypes exist.
  • These pulmotypes are associated with and may influence asthma, especially inflammatory phenotypes.