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Related Concept Videos

Complement System01:27

Complement System

2.4K
The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
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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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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.
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Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
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Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

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The pathophysiology of pneumonia involves the following steps:
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Acute Respiratory Failure-V01:29

Acute Respiratory Failure-V

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The treatment for acute respiratory failure varies based on factors like the underlying cause, overall health, and severity. A collaborative healthcare team is essential for early detection, often through arterial blood gas analysis. Identifying the cause is the primary goal, with treatment strategies adjusted for ventilation/perfusion (V/Q) mismatch, shunting, or diffusion impairment.
Ensure that patients are monitored continuously for their response to therapy, including changes in...
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Related Experiment Video

Updated: Jul 6, 2025

Visualizing Lung Cellular Adaptations during Combined Ozone and LPS Induced Murine Acute Lung Injury
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Visualizing Lung Cellular Adaptations during Combined Ozone and LPS Induced Murine Acute Lung Injury

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The complement cascade in lung injury and disease.

M G Detsika1, K Palamaris2, I Dimopoulou3

  • 11st Department of Critical Care Medicine & Pulmonary Services, GP Livanos and M Simou Laboratories, Evangelismos Hospital, National and Kapodistrian University of Athens, 3, Ploutarchou St., 10675, Athens, Greece. mdetsika@med.uoa.gr.

Respiratory Research
|January 4, 2024
PubMed
Summary

The complement system, a key immune defense, plays a significant role in lung diseases. Understanding its mechanisms offers new therapeutic targets for conditions like asthma and COPD.

Keywords:
ComplementComplement-related therapeuticsLung disease

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Area of Science:

  • Immunology
  • Pulmonology

Background:

  • The complement system is a crucial component of innate and adaptive immunity.
  • Emerging evidence highlights its role in various lung pathologies beyond pathogen defense.

Purpose of the Study:

  • To review the involvement of complement factors in lung diseases.
  • To elucidate the mechanisms by which complement contributes to lung pathologies.

Main Methods:

  • Review of literature implicating complement factors (e.g., C3a, C5a) and their receptors in lung diseases.
  • Examination of complement inhibitory proteins (e.g., CD55, CD46, CD59).

Main Results:

  • Specific complement factors and receptors are implicated in acute respiratory distress syndrome, pneumonia, COPD, asthma, interstitial lung diseases, and lung cancer.
  • The precise mechanisms driving complement-induced lung pathology remain under investigation.

Conclusions:

  • The complement system significantly contributes to the progression of both acute and chronic lung diseases.
  • Further research into complement pathways will inform novel therapeutic strategies targeting lung diseases.