Fine mapping of bone structure and strength QTLs in heterogeneous stock rat

Imranul Alam, Daniel L. Koller, Toni Cañete, Gloria Blázquez, Carme Mont-Cardona, Regina López-Aumatell, Esther Martínez-Membrives, Sira Díaz-Morán, Adolf Tobeña, Alberto Fernández-Teruel, Pernilla Stridh, Margarita Diez, Tomas Olsson, Martina Johannesson, Amelie Baud, Michael Econs, Tatiana Foroud

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We previously demonstrated that skeletal structure and strength phenotypes vary considerably in heterogeneous stock (HS) rats. These phenotypes were found to be strongly heritable, suggesting that the HS rat model represents a unique genetic resource for dissecting the complex genetic etiology underlying bone fragility. The purpose of this study was to identify and localize genes associated with bone structure and strength phenotypes using 1524 adult male and female HS rats between 17 to 20weeks of age. Structure measures included femur length, neck width, head width; femur and lumbar spine (L3-5) areas obtained by DXA; and cross-sectional areas (CSA) at the midshaft, distal femur and femoral neck, and the 5th lumbar vertebra measured by CT. In addition, measures of strength of the whole femur and femoral neck were obtained. Approximately 70,000 polymorphic SNPs distributed throughout the rat genome were selected for genotyping, with a mean linkage disequilibrium coefficient between neighboring SNPs of 0.95. Haplotypes were estimated across the entire genome for each rat using a multipoint haplotype reconstruction method, which calculates the probability of descent at each locus from each of the 8 HS founder strains. The haplotypes were then tested for association with each structure and strength phenotype via a mixed model with covariate adjustment. We identified quantitative trait loci (QTLs) for structure phenotypes on chromosomes 3, 8, 10, 12, 17 and 20, and QTLs for strength phenotypes on chromosomes 5, 10 and 11 that met a conservative genome-wide empiric significance threshold (FDR=5%; P<3×10<sup>-6</sup>). Importantly, most QTLs were localized to very narrow genomic regions (as small as 0.3Mb and up to 3Mb), each harboring a small set of candidate genes, both novel and previously shown to have roles in skeletal development and homeostasis.

Original languageEnglish
Article number10840
Pages (from-to)417-426
Number of pages10
JournalBone
Volume81
DOIs
StatePublished - Dec 1 2015

Fingerprint

Quantitative Trait Loci
Femur Neck
Phenotype
Bone and Bones
Haplotypes
Genome
Single Nucleotide Polymorphism
Chromosomes, Human, Pair 8
Chromosomes, Human, Pair 10
Lumbar Vertebrae
Chromosomes, Human, Pair 5
Chromosomes, Human, Pair 11
Chromosomes, Human, Pair 3
Linkage Disequilibrium
Femur
Genes
Spine
Homeostasis
Head

Keywords

  • Bone strength
  • Bone structure
  • Genes
  • Heterogeneous stock rat
  • Osteoporosis

ASJC Scopus subject areas

  • Physiology
  • Endocrinology, Diabetes and Metabolism
  • Histology

Cite this

Alam, I., Koller, D. L., Cañete, T., Blázquez, G., Mont-Cardona, C., López-Aumatell, R., ... Foroud, T. (2015). Fine mapping of bone structure and strength QTLs in heterogeneous stock rat. Bone, 81, 417-426. [10840]. https://doi.org/10.1016/j.bone.2015.08.013

Fine mapping of bone structure and strength QTLs in heterogeneous stock rat. / Alam, Imranul; Koller, Daniel L.; Cañete, Toni; Blázquez, Gloria; Mont-Cardona, Carme; López-Aumatell, Regina; Martínez-Membrives, Esther; Díaz-Morán, Sira; Tobeña, Adolf; Fernández-Teruel, Alberto; Stridh, Pernilla; Diez, Margarita; Olsson, Tomas; Johannesson, Martina; Baud, Amelie; Econs, Michael; Foroud, Tatiana.

In: Bone, Vol. 81, 10840, 01.12.2015, p. 417-426.

Research output: Contribution to journalArticle

Alam, I, Koller, DL, Cañete, T, Blázquez, G, Mont-Cardona, C, López-Aumatell, R, Martínez-Membrives, E, Díaz-Morán, S, Tobeña, A, Fernández-Teruel, A, Stridh, P, Diez, M, Olsson, T, Johannesson, M, Baud, A, Econs, M & Foroud, T 2015, 'Fine mapping of bone structure and strength QTLs in heterogeneous stock rat', Bone, vol. 81, 10840, pp. 417-426. https://doi.org/10.1016/j.bone.2015.08.013
Alam I, Koller DL, Cañete T, Blázquez G, Mont-Cardona C, López-Aumatell R et al. Fine mapping of bone structure and strength QTLs in heterogeneous stock rat. Bone. 2015 Dec 1;81:417-426. 10840. https://doi.org/10.1016/j.bone.2015.08.013
Alam, Imranul ; Koller, Daniel L. ; Cañete, Toni ; Blázquez, Gloria ; Mont-Cardona, Carme ; López-Aumatell, Regina ; Martínez-Membrives, Esther ; Díaz-Morán, Sira ; Tobeña, Adolf ; Fernández-Teruel, Alberto ; Stridh, Pernilla ; Diez, Margarita ; Olsson, Tomas ; Johannesson, Martina ; Baud, Amelie ; Econs, Michael ; Foroud, Tatiana. / Fine mapping of bone structure and strength QTLs in heterogeneous stock rat. In: Bone. 2015 ; Vol. 81. pp. 417-426.
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AU - López-Aumatell, Regina

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