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Related Concept Videos

Immunodeficiency Diseases01:25

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.
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Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
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Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
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Chromosomal radiosensitivity in patients with common variable immunodeficiency.

Asghar Aghamohammadi1, Mostafa Moin, Ali Kouhi

  • 1Department of Allergy and Clinical Immunology of Children's Medical Center, Immunology, Asthma and Allergy Research Institute, Medical Sciences/University of Tehran, Tehran, Iran. aghamohammadi@sina.tums.ac.ir

Immunobiology
|May 13, 2008
PubMed
Summary
This summary is machine-generated.

Common variable immunodeficiency (CVID) patients exhibit increased chromosomal aberrations after in vitro irradiation. This heightened radiosensitivity suggests a need for caution with radiation exposure in CVID individuals.

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Area of Science:

  • Immunology
  • Genetics
  • Oncology

Background:

  • Common variable immunodeficiency (CVID) is a primary immunodeficiency characterized by recurrent infections, autoimmunity, and increased cancer risk.
  • The higher prevalence of malignancies in CVID patients suggests potential underlying genetic or cellular susceptibilities.
  • Increased radiosensitivity is hypothesized as a contributing factor to the elevated cancer rates observed in CVID.

Purpose of the Study:

  • To investigate the in vitro chromosomal radiosensitivity of lymphocytes from CVID patients.
  • To compare the radiosensitivity of CVID patients with healthy individuals and ataxia telangiectasia (a known radiosensitive disorder).
  • To explore the potential implications of radiosensitivity for CVID patient management and classification.

Main Methods:

  • Lymphocytes were cultured from 20 CVID patients and healthy controls.
  • Cell cultures were subjected to in vitro irradiation at doses of 50 and 100 cGy.
  • Metaphases were analyzed for chromosomal aberrations, with ataxia telangiectasia patients serving as positive controls.

Main Results:

  • No significant differences in chromosomal aberrations were observed between groups before irradiation.
  • CVID patients showed a statistically significant higher incidence of chromosomal aberrations post-irradiation, particularly at 100 cGy (P<0.05).
  • The study demonstrated increased in vitro radiosensitivity in CVID patient lymphocytes compared to healthy controls.

Conclusions:

  • CVID patients exhibit heightened susceptibility to in vitro radiation-induced chromosomal damage.
  • These findings underscore the importance of protecting CVID patients from unnecessary radiographic procedures.
  • Assessing radiosensitivity may offer a novel approach for classifying CVID patients and understanding their disease heterogeneity.