Volume 49, Issue 11 pp. 974-982

Genetic dissection of the complex pathological manifestations of collagen disease in MRL/lpr mice

Syuichi Nakatsuru

Syuichi Nakatsuru

KAN Research Institute, Kyoto,

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Miho Terada

Miho Terada

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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Miyuki Nishihara

Miyuki Nishihara

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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Junji Kamogawa

Junji Kamogawa

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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Tatsuhiko Miyazaki

Tatsuhiko Miyazaki

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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Wei-Min Qu

Wei-Min Qu

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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Koji Morimoto

Koji Morimoto

KAN Research Institute, Kyoto,

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Chie Yazawa

Chie Yazawa

KAN Research Institute, Kyoto,

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Hideaki Ogasawara

Hideaki Ogasawara

KAN Research Institute, Kyoto,

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Yoriko Abe

Yoriko Abe

KAN Research Institute, Kyoto,

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Keiko Fukui

Keiko Fukui

KAN Research Institute, Kyoto,

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Go Ichien

Go Ichien

KAN Research Institute, Kyoto,

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Mitsuko R. Ito

Mitsuko R. Ito

Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai,

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Shiro Mori

Shiro Mori

Second Department of Oral and Maxillofacial Surgery, Tohoku University School of Dentistry, Sendai and

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Yusuke Nakamura

Yusuke Nakamura

Human Genome Center, University of Tokyo, Tokyo, Japan

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Masato Nose

Masato Nose

Second Department of Pathology, Ehime University School of Medicine, Ehime,

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First published: 04 January 2002
Citations: 19
Correspondence: MasatoNoseMD Second Department of Pathology, Ehime University School of Medicine, Shigenobu-cho, Onsen-gun, Ehime 791-0295, Japan. Email: [email protected]

Abstract

An MRL strain of mice bearing a Fas-deletion mutant gene, lpr, MRL/MpJ-lpr/lpr (MRL/lpr) develops collagen disease involving vasculitis, glomerulonephritis, arthritis and sialoadenitis, each of which has been studied as a model for polyarteritis, lupus nephritis, rheumatoid arthritis and Sjögren’s syndrome, respectively. Development of such lesions seems dependent on host genetic background since the congenic C3H/HeJ-lpr/lpr (C3H/lpr) mice rarely develop them. To identify the gene loci affecting each lesion, a genetic dissection of these complex pathological manifestations was carried out. First, histopathological features in MRL/lpr, C3H/lpr, (MRL/lpr × C3H/lpr) F1 intercross, and MRL/lpr × (MRL/lpr × C3H/lpr) F1 backcross mice were analyzed. Genomic DNA of the backcross mice were subjected to association studies by Chi-squared analysis for determining which polymorphic microsatellite locus occurs at higher frequency among affected compared to unaffected individuals for each lesion. As a result, gene loci recessively associated with each lesion were mapped on different chromosomal positions. We concluded that each of these lesions in MRL/lpr mice is under the control of a different set of genes, suggesting that the complex pathological manifestations of collagen disease result from polygenic inheritance.

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