Modulation of B-cell abnormalities in lupus-prone (NZB x NZW)F1 mice by normal bone marrow-derived B-lineage cells

D. Z. Shao, S. Yamada, F. Hirayama, H. Hirano, S. Ono, T. Hamaoka

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

(NZB x NZW)F1(NZB/WF1) mice spontaneously develop an autoimmune disease characterized by abnormality of haemopoietic stem cells. The present study examined a possible regulatory cell interaction between NZB/WF1 and normal bone marrow cells using radiation-induced chimeras. We demonstrated that the ability of NZB/WF1 bone marrow cells to transfer the typical disease with hypergammaglobulinemia including autoantibodies into lethally irradiated normal recipients was prevented by cotransfer of bone marrow from normal CBA/J mice but not from xid CBA/N mice carrying a selective defect in B-cell function. Flow cytometric analysis revealed that the generation of NZB/WF1 cells was reduced in the mixed chimeras given CBA/J but not CBA/N bone marrow cells. Interestingly, radiation chimeras reconstituted with a mixture of NZB/WF1 bone marrow and CBA/J splenic B cells did not show elevation of serum immunoglobulin levels, although most of the spleen cells were dominated by NZB/WF1 cells. On the other hand, NZB/ WF1 B cells maturated in vivo in the presence of CBA/J bone marrow or splenic B cells lost the hyper-responsiveness to lipopolysaccharide (LPS) in the autoantibody production in vitro. These results suggest that radiosensitive normal B-lineage cells have the regulatory activity to ameliorate the hypergammaglobulinemia of NZB/WF1 mice by. reducing the generation of NZB/WF1 B cells and/or by correcting their hyper-responsiveness, and that NZB/WF1 mice may have a defect(s) in the regulatory cell function. In addition, CBA/J splenic B cells were shown to, modulate the B-cell abnormality even when injected. into-non-irradiated NZB/WF1 mice manifesting autoimmunity.

Original languageEnglish
Pages (from-to)16-25
Number of pages10
JournalImmunology
Volume85
Issue number1
Publication statusPublished - 1995 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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