A congenic mouse and candidate gene at the Chromosome 13 locus regulating bone density

Previously, we identified two significant quantitative trait loci (QTLs) specifying the peak relative bone mass (bone mass corrected for bone size) on chromosomes (Chrs) 11 and 13 by interval mapping in two mouse strains, SAMP2 and SAMP6. The latter strain is an established murine model of senile os...

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Veröffentlicht in:Mammalian genome 2002-07, Vol.13 (7), p.335-340
Hauptverfasser: Shimizu, Motoyuki, Higuchi, Keiichi, Kasai, Soichiro, Tsuboyama, Tadao, Matsushita, Mutsumi, Matsumura, Takuro, Okudaira, Shuzo, Mori, Masayuki, Koizumi, Akio, Nakamura, Takashi, Hosokawa, Masanori
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container_end_page 340
container_issue 7
container_start_page 335
container_title Mammalian genome
container_volume 13
creator Shimizu, Motoyuki
Higuchi, Keiichi
Kasai, Soichiro
Tsuboyama, Tadao
Matsushita, Mutsumi
Matsumura, Takuro
Okudaira, Shuzo
Mori, Masayuki
Koizumi, Akio
Nakamura, Takashi
Hosokawa, Masanori
description Previously, we identified two significant quantitative trait loci (QTLs) specifying the peak relative bone mass (bone mass corrected for bone size) on chromosomes (Chrs) 11 and 13 by interval mapping in two mouse strains, SAMP2 and SAMP6. The latter strain is an established murine model of senile osteoporosis and exhibits a significantly lower peak relative bone mass than SAMP2 mice. We recently designated the Chr 13 locus as Pbd2 (Peak bone density 2) and constructed a congenic strain, P6.P2-Pbd2(b), which carried a single genomic interval from the Chr 13 of SAMP2 on a SAMP6-derived osteoporotic background. In this study, we have constructed a congenic strain, P2.P6-Pbd2(a), carrying a SAMP6-derived susceptible interval on a SAMP2-derived resistance background. This congenic strain had a lower bone density than the background strain, SAMP2, based on three measurement methods, each utilizing a different principle for evaluating bone density: MD, DXA, and pQCT. Next, a candidate gene approach was used to find polymorphisms of Bmp6 (bone morphogenetic protein 6). The CAG trinucleotide repeat numbers in exon 1 of this gene differ among SAM strains. We found an association of CAG repeat length with relative peak bone mass in mice.
doi_str_mv 10.1007/s00335-001-2129-4
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subjects Animals
Base Sequence
Bone Density - genetics
Chromosome Mapping
Chromosomes, Mammalian - genetics
Femur - anatomy & histology
Mice
Mice, Congenic
Mice, Inbred Strains
Molecular Sequence Data
Organ Size
Phenotype
Polymorphism, Genetic - genetics
Quantitative Trait Loci - genetics
Trinucleotide Repeats - genetics
title A congenic mouse and candidate gene at the Chromosome 13 locus regulating bone density
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