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Virchows Archiv B

, 56:59 | Cite as

Histopathological characteristics of the kidney in recombinant inbred mice established from MRL/lpr × AKR crossing

Dissociation of severity of lupus nephritis from the degree of lymphadenopathy
  • Masahiko Makino
  • Takashi Morita
  • Michio Fujiwara
Article

Summary

Recombinant inbred (RI) lines were established from (MRL/lpr × AKR) crosses in order to analyze the role of thelpr gene and the particiption of background genes in the lymphoproliferation and the development of lupus glomerulonephritis (LGN). In this study, six lines were used to compare with MRL/lpr and AKR mice. Lymphadenopathy was pressent in four lines (A-22, A-31 b, A-31 e and C-12) but absent in the other two (A-21 and C-21). The degree of lymphoproliferation varied between individuals of the RI lines showing lymphadenopathy. On gross examinations, the most marked lymph node enlargement was seen in the A-31 b line, which resembled MRL/lpr mice in this respect; lymphadenopathy was least prominent in the C-12 line and intermediate degrees occurred in the A-22 and A-31 e lines. Like MRL/lpr mice, deaths in the RI lines were due to LGN; however, in the lines with lymphadenopathy, 50% mortalities occurred a few weeks later than in MRL/lpr mice. The kidneys were examined histologically for proliferative, exudative, extracapillary and membranous changes in the glomeruli. The glomerular lesions in the A-22, A-31 b and A-31 e lines closely resembled those in MRL/lpr mice, but in the C12 line in which lymph node enlargement was least apparent, the histological abnormalities were significantly more severe. Of the lines without lymphadenopathy, histopathological examination showed obvious renal abnormalities in the A-21 line but none in the C-21 line or in AKR mice. From these findings it appears that there are autosomal genes which affect the expression of thelpr gene and thus modify the development of LGN and lymphoproliferation.

Key words

Recombinant inbred mice MRL/lpr mice lpr gene Lymphoproliferation Immune complex glomerulonephritis 

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Masahiko Makino
    • 1
  • Takashi Morita
    • 2
  • Michio Fujiwara
    • 1
  1. 1.Laboratory of ImmunologyNiigata University School of MedicineNiigataJapan
  2. 2.Department of PathologyShinrakuen HospitalNiigataJapan

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