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Related Concept Videos

Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
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Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

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Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum...
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
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Autoimmune Disorders01:29

Autoimmune Disorders

2.1K
Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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Disorders of Leukocytes01:27

Disorders of Leukocytes

2.3K
Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
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Related Experiment Video

Updated: Mar 14, 2026

Intracerebroventricular and Intravascular Injection of Viral Particles and Fluorescent Microbeads into the Neonatal Brain
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Neurologic Complications of Common Variable Immunodeficiency.

Jenna Thuc-Uyen Nguyen1, Ari Green2,3, Michael R Wilson2

  • 1Division of Allergy and Immunology, University of California, San Francisco, 400 Parnassus Ave, San Francisco, CA, 94143, USA. jenna.nguyen@ucsf.edu.

Journal of Clinical Immunology
|October 6, 2016
PubMed
Summary
This summary is machine-generated.

Common variable immunodeficiency (CVID) can cause serious neurologic issues. Infections and inflammatory conditions are the most frequent causes of these rare CVID-related neurological complications.

Keywords:
AutoimmuneCommon variable immunodeficiencyNeurologic disease

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Area of Science:

  • Immunology
  • Neurology

Background:

  • Common variable immunodeficiency (CVID) is a primary immunodeficiency characterized by hypogammaglobulinemia, impaired B-cell differentiation, and recurrent infections.
  • Neurologic complications are infrequent but recognized manifestations of CVID, encompassing a spectrum of disorders.

Observation:

  • This article presents a case of CVID with significant neurologic morbidity.
  • A review of existing literature categorizes the range of neurologic complications associated with CVID.

Findings:

  • The case underscores the complex and varied neurologic presentations in CVID patients.
  • Analysis of the current literature indicates that infections and inflammatory neurologic disorders are the predominant causes of neurologic manifestations in CVID.

Implications:

  • Understanding the spectrum of neurologic complications in CVID is crucial for timely diagnosis and management.
  • Further research into the pathogenesis of CVID-associated neurologic disorders may lead to improved therapeutic strategies.