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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...

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Related Experiment Video

Updated: Jul 15, 2026

Processing of Bronchoalveolar Lavage Fluid and Matched Blood for Alveolar Macrophage and CD4+ T-cell Immunophenotyping and HIV Reservoir Assessment
07:21

Processing of Bronchoalveolar Lavage Fluid and Matched Blood for Alveolar Macrophage and CD4+ T-cell Immunophenotyping and HIV Reservoir Assessment

Published on: June 23, 2019

[Deep lung--cellular reaction to HIV].

Maria Alcide Tavares Marques1, Vera Alves, Victor Duque

  • 1Departamento de Ciências Pneumológicas e Alergológicas dos Hospitais da Universidade de Coimbra.

Revista Portuguesa De Pneumologia
|May 12, 2007
PubMed
Summary

HIV infection causes significant lung defense abnormalities. Pulmonary immune responses vary individually, with alveolar macrophages playing a crucial role in defense, highlighting the need for personalized patient management strategies.

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In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function
09:26

In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function

Published on: October 15, 2013

Related Experiment Videos

Last Updated: Jul 15, 2026

Processing of Bronchoalveolar Lavage Fluid and Matched Blood for Alveolar Macrophage and CD4+ T-cell Immunophenotyping and HIV Reservoir Assessment
07:21

Processing of Bronchoalveolar Lavage Fluid and Matched Blood for Alveolar Macrophage and CD4+ T-cell Immunophenotyping and HIV Reservoir Assessment

Published on: June 23, 2019

In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function
09:26

In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function

Published on: October 15, 2013

Area of Science:

  • Immunology
  • Virology
  • Pulmonology

Context:

  • HIV infection leads to progressive immune dysfunction, significantly impacting pulmonary health.
  • The lungs are a primary target for opportunistic infections and non-infectious complications in AIDS patients.
  • Understanding HIV's dynamic effects on pulmonary cells and host defenses is crucial for managing lung complications.

Purpose:

  • To evaluate pulmonary cellular dynamics in AIDS patients, analyzing viral load in bronchoalveolar lavage fluid (BALF).
  • To assess cellularity and tropism in the lungs by examining CCR5 and CXCR4 receptor expression.
  • To investigate the compartmentalized immune response within the pulmonary system during HIV infection.

Summary:

  • HIV patients exhibit distinct pulmonary cellular profiles and receptor expression (CCR5, CXCR4) in BALF compared to blood.
  • Alveolar macrophages show high CXCR4 expression, suggesting a key role in pulmonary defense, especially in later disease stages.
  • Significant individual variability in viral loads and immune cell subsets underscores the complexity of HIV's pulmonary impact.

Impact:

  • Findings reveal a compartmentalized pulmonary immune response to HIV, crucial for understanding disease progression and therapeutic strategies.
  • The distinct expression patterns of CCR5 and CXCR4 in pulmonary versus systemic compartments offer insights into viral tropism and host defense.
  • Highlights the critical role of alveolar macrophages as a persistent defense mechanism in the lungs during advanced HIV infection.