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Related Concept Videos

Complement System01:27

Complement System

12.7K
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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Antimicrobial Proteins01:23

Antimicrobial Proteins

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
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Antibody Actions01:26

Antibody Actions

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Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
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Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

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Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
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Related Experiment Video

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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
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Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

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Activated Complement Factors as Disease Markers for Sepsis.

Jean Charchaflieh1, Julie Rushbrook2, Samrat Worah2

  • 1Department of Anesthesiology, Yale University School of Medicine, New Haven, CT 06510, USA.

Disease Markers
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Summary

Complement factors show promise as early biomarkers for sepsis, a major cause of death. Further research could lead to a sepsis biomarker panel for faster diagnosis and better patient outcomes.

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Area of Science:

  • Immunology
  • Biochemistry
  • Critical Care Medicine

Background:

  • Sepsis is a significant global health threat, demanding early detection for improved patient outcomes.
  • Current diagnostic methods for sepsis lack sufficient early predictive biomarkers.
  • Complement factors are implicated in sepsis pathogenesis and may serve as valuable early indicators.

Purpose of the Study:

  • To review the role of complement factors in sepsis development based on recent animal and clinical studies.
  • To evaluate the potential of complement factors as biomarkers for sepsis severity and outcome.
  • To present new findings on mannose-binding lectin's involvement in septic shock patients.

Main Methods:

  • Systematic review of animal and clinical studies on complement factors in sepsis.
  • Analysis of existing literature on complement factor roles in sepsis.
  • Presentation of original laboratory data concerning mannose-binding lectin in septic shock.

Main Results:

  • Complement factors play a critical role in the complex mechanisms underlying sepsis.
  • Evidence suggests complement factors can serve as early indicators of sepsis and predict outcomes.
  • Novel data highlights the involvement of mannose-binding lectin in septic shock.

Conclusions:

  • Complement factors represent a promising area for developing novel sepsis biomarkers.
  • Further clinical studies are essential to fully characterize complement factor profiles in sepsis.
  • A multipanel biomarker approach incorporating complement factors could enhance early sepsis diagnosis and treatment.