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Related Concept Videos

Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

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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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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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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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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.01:25

Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.

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Understanding the variety of primary symptoms and systemic complications that characterize chronic obstructive pulmonary disease (COPD) is crucial for healthcare professionals.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
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Related Experiment Video

Updated: Jun 11, 2025

Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
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Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses

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Aggravating mechanisms from COVID-19.

Jong Hoon Lee1,2, Consolato Sergi3, Richard E Kast4

  • 1Science and Research Center, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea. science@research.re.kr.

Virology Journal
|September 28, 2024
PubMed
Summary
This summary is machine-generated.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes immune-mediated diseases through inflammasome activation, cGAS-STING signaling, and SAMHD1 tetramerization. These mechanisms explain COVID-19

Keywords:
CGAS–STINGCOVID-19InflammasomeNLRP3SAMHD1SARS-CoV-2

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Area of Science:

  • Immunology and Virology
  • Molecular Mechanisms of Viral Pathogenesis

Background:

  • Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection triggers significant immune responses.
  • Understanding the molecular pathways is crucial for addressing COVID-19's multi-organ effects.

Purpose of the Study:

  • To elucidate the key molecular mechanisms driving COVID-19 pathogenesis.
  • To connect viral-host interactions with observed organ injuries in COVID-19 patients.

Main Methods:

  • Analysis of SARS-CoV-2 induced inflammasome activation pathways.
  • Investigation of the cGAS-STING signaling pathway in COVID-19.
  • Examination of SAMHD1 tetramerization and its role in interferon production and viral replication.

Main Results:

  • SARS-CoV-2 utilizes inflammasome activation, cGAS-STING signaling, and SAMHD1 tetramerization to produce Interferon-I (IFN-I).
  • Specific viral proteins (ORF3a, NSP6, NSP7, NSP8) interfere with innate immune signaling pathways like RIG-I/MDA5, TRIF, and cGAS-STING.
  • SAMHD1's tetramerization and nucleic acid binding modulate antiviral responses and are linked to disease mechanisms.

Conclusions:

  • Inflammasome activation, cGAS-STING signaling, and SAMHD1 tetramerization are central to COVID-19 pathophysiology.
  • These mechanisms explain the acute kidney, hepatic, cardiac, neurological, and gastrointestinal injuries observed in COVID-19.
  • Targeting these pathological pathways may be essential for managing diverse COVID-19 related diseases.