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Hyperdiploid-CD5-positive B cells in mouse.

E S Raveche1, J H Tjio

  • 1Department of Pathology, UMDNJ, New Jersey Medical School, Newark 07103.

International Journal of Hematology
|February 1, 1991
PubMed
Summary
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A specific type of B cell, known as hyperdiploid B cells, were found to be an inherited trait in aging autoimmune mice. These cells share characteristics with both autoimmune and malignant cells.

Area of Science:

  • Immunology
  • Genetics
  • Autoimmunity

Background:

  • Autoimmune diseases like those in NZB mice are complex and involve immune system dysregulation.
  • B cells play a crucial role in the immune response and can be implicated in autoimmune conditions.

Purpose of the Study:

  • To investigate the nature and inheritance of hyperdiploid B cells in aging autoimmune NZB mice.
  • To determine the characteristics and behavior of these hyperdiploid B cells.

Main Methods:

  • Cytogenetic analysis and immunoglobulin gene rearrangement studies were used to confirm clonality.
  • Studies of inheritance in F1 and backcross mice, along with recombinant inbred strains, were performed.
  • Analysis of transferred hyperdiploid B cells and their expansion in recipients was conducted.

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Main Results:

  • Hyperdiploid B cells in NZB mice are clonal and represent an inherited recessive trait linked to autoimmune hyperactivity.
  • These cells possess a unique chromosome abnormality and expand in lymphoid organs after transfer.
  • Hyperdiploid B cells were identified as CD5+ B cells, similar to those found in certain autoimmune states and chronic lymphocytic leukemia.

Conclusions:

  • The presence of hyperdiploid B cells is a genetically determined trait associated with autoimmunity in NZB mice.
  • These cells exhibit characteristics of both autoimmune and malignant B cells, suggesting a potential link between genetic predisposition, autoimmunity, and cellular abnormalities.