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Immunodeficiency Diseases

Immunodeficiency Diseases

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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Related Experiment Video

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Isolation of Double Negative αβ T Cells from the Kidney

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Immune status of Fanconi anemia patients: decrease in T CD8 and CD56dim CD16+ NK lymphocytes.

Graça A Justo¹, Marco A Bitencourt, Ricardo Pasquini

¹Departamento de Bioquímica, IBRAG, UERJ, Rio de Janeiro, Brazil, magrajusto@hotmail.com.

Annals of Hematology

|November 19, 2013

Summary

Fanconi anemia (FA) patients show reduced T CD8(+) and specific natural killer (NK) cell subsets, indicating potential immune system defects. This may impair immune surveillance and cytotoxic responses in individuals with FA.

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Last Updated: May 5, 2026

Isolation of Double Negative αβ T Cells from the Kidney

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Published on: May 16, 2014

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Area of Science:

Immunology
Hematology
Genetics

Background:

Fanconi anemia (FA) is a rare genetic disorder characterized by bone marrow failure, developmental abnormalities, and increased cancer risk.
Subtle immune cell irregularities are suspected in FA, potentially impacting immune surveillance.
Natural killer (NK) cell subsets, specifically CD56(dim) and CD56(bright), represent sequential differentiation stages.

Purpose of the Study:

To investigate alterations in NK cell subsets and T lymphocyte populations in Fanconi anemia patients.
To correlate these immune cell changes with the clinical hematological status of FA patients.

Main Methods:

Comparative analysis of immune cell populations (NK cells and T lymphocytes) in a cohort of 42 FA patients and healthy controls.
Correlation of immune cell subset proportions with clinical hematological data.

Main Results:

FA patients exhibited a decreased proportion of T CD8(+) lymphocytes compared to healthy controls.
A reduction in NK CD56(dim)CD16(+) cells and an imbalance in NK cell subsets were observed in FA patients.
These findings suggest potential defects in cytotoxic response and NK cell differentiation pathways.

Conclusions:

Fanconi anemia is associated with a diminished number of cytotoxic cells, specifically T CD8(+) and certain NK cell subsets.
Impaired differentiation of NK cell subsets in FA patients may contribute to compromised immune surveillance.
The observed immune cell irregularities likely play a role in the pathogenesis and clinical manifestations of Fanconi anemia.