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Åke Lernmark

Principal investigator

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Aberrancies in the differentiation and maturation of dendritic cells from bone-marrow precursors are linked to various genes on chromosome 4 and other chromosomes of the BB-DP rat.

Author

  • Vinod Sommandas
  • Elizabeth A. Rutledge
  • Brian Van Yserloo
  • Jessica Fuller
  • Åke Lernmark
  • Hemmo A. Drexhage

Summary, in English

BB-Diabetes Prone (BB-DP) rats, a model for endocrine autoimmune diseases, are severely lymphopenic, especially lacking ART2+ regulatory T cells. BB-Diabetes Resistant (DR) rats are not lymphopenic and do not develop autoimmunity. BB-DP and BB-DR rats only differ at the lymphopenia (lyp) gene (iddm2) on chromosome 4. Since BB-DP rats also show aberrancies in the differentiation of dendritic cells (DC) from bone-marrow precursors, we tested the hypothesis that F344 rats congenic for a BB-DP chromosome 4 region (42.5-93.6Mb; including the lyp gene, but also iddm4) display an in vitro DC differentiation different from normal F344 rats. Here we show that the 42.5-93.6Mb BB-DP chromosome 4 region is linked to an increased DC precursor apoptosis, a low MHC class II expression, a reduced IL-10 production and a reduced T cell stimulatory capacity of DC. From our previous report on DC differentiation defects in BB rats (only differing in iddm2) and the present report, we deduce that the abnorma

Publishing year

2004

Language

English

Pages

1-12

Publication/Series

Journal of Autoimmunity

Volume

25

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Rheumatology and Autoimmunity

Keywords

  • BB rat
  • Diabetes
  • Dendritic cells
  • lyp gene

Status

Published

ISBN/ISSN/Other

  • ISSN: 0896-8411