Heterogeneous stock rat: A unique animal model for mapping genes influencing bone fragility

Imranul Alam, Daniel L. Koller, Qiwei Sun, Ryan K. Roeder, Toni Cañete, Gloria Blázquez, Regina López-Aumatell, Esther Martínez-Membrives, Elia Vicens-Costa, Carme Mont, Sira Díaz, Adolf Tobeña, Alberto Fernández-Teruel, Adam Whitley, Pernilla Strid, Margarita Diez, Martina Johannesson, Jonathan Flint, Michael Econs, Charles H. TurnerTatiana Foroud

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Previously, we demonstrated that skeletal mass, structure and biomechanical properties vary considerably among 11 different inbred rat strains. Subsequently, we performed quantitative trait loci (QTL) analysis in four inbred rat strains (F344, LEW, COP and DA) for different bone phenotypes and identified several candidate genes influencing various bone traits. The standard approach to narrowing QTL intervals down to a few candidate genes typically employs the generation of congenic lines, which is time consuming and often not successful. A potential alternative approach is to use a highly genetically informative animal model resource capable of delivering very high resolution gene mapping such as Heterogeneous stock (HS) rat. HS rat was derived from eight inbred progenitors: ACI/N, BN/SsN, BUF/N, F344/N, M520/N, MR/N, WKY/N and WN/N. The genetic recombination pattern generated across 50 generations in these rats has been shown to deliver ultra-high even gene-level resolution for complex genetic studies. The purpose of this study is to investigate the usefulness of the HS rat model for fine mapping and identification of genes underlying bone fragility phenotypes. We compared bone geometry, density and strength phenotypes at multiple skeletal sites in HS rats with those obtained from five of the eight progenitor inbred strains. In addition, we estimated the heritability for different bone phenotypes in these rats and employed principal component analysis to explore relationships among bone phenotypes in the HS rats. Our study demonstrates that significant variability exists for different skeletal phenotypes in HS rats compared with their inbred progenitors. In addition, we estimated high heritability for several bone phenotypes and biologically interpretable factors explaining significant overall variability, suggesting that the HS rat model could be a unique genetic resource for rapid and efficient discovery of the genetic determinants of bone fragility.

Original languageEnglish
Pages (from-to)1169-1177
Number of pages9
JournalBone
Volume48
Issue number5
DOIs
StatePublished - May 1 2011

Fingerprint

Chromosome Mapping
Animal Models
Bone and Bones
Phenotype
Inbred Strains Rats
Quantitative Trait Loci
Genes
Principal Component Analysis
Bone Density
Genetic Recombination

Keywords

  • Bone density
  • Bone strength
  • Genetics
  • Heterogeneous stock rat
  • Osteoporosis

ASJC Scopus subject areas

  • Physiology
  • Endocrinology, Diabetes and Metabolism
  • Histology

Cite this

Heterogeneous stock rat : A unique animal model for mapping genes influencing bone fragility. / Alam, Imranul; Koller, Daniel L.; Sun, Qiwei; Roeder, Ryan K.; Cañete, Toni; Blázquez, Gloria; López-Aumatell, Regina; Martínez-Membrives, Esther; Vicens-Costa, Elia; Mont, Carme; Díaz, Sira; Tobeña, Adolf; Fernández-Teruel, Alberto; Whitley, Adam; Strid, Pernilla; Diez, Margarita; Johannesson, Martina; Flint, Jonathan; Econs, Michael; Turner, Charles H.; Foroud, Tatiana.

In: Bone, Vol. 48, No. 5, 01.05.2011, p. 1169-1177.

Research output: Contribution to journalArticle

Alam, I, Koller, DL, Sun, Q, Roeder, RK, Cañete, T, Blázquez, G, López-Aumatell, R, Martínez-Membrives, E, Vicens-Costa, E, Mont, C, Díaz, S, Tobeña, A, Fernández-Teruel, A, Whitley, A, Strid, P, Diez, M, Johannesson, M, Flint, J, Econs, M, Turner, CH & Foroud, T 2011, 'Heterogeneous stock rat: A unique animal model for mapping genes influencing bone fragility', Bone, vol. 48, no. 5, pp. 1169-1177. https://doi.org/10.1016/j.bone.2011.02.009
Alam, Imranul ; Koller, Daniel L. ; Sun, Qiwei ; Roeder, Ryan K. ; Cañete, Toni ; Blázquez, Gloria ; López-Aumatell, Regina ; Martínez-Membrives, Esther ; Vicens-Costa, Elia ; Mont, Carme ; Díaz, Sira ; Tobeña, Adolf ; Fernández-Teruel, Alberto ; Whitley, Adam ; Strid, Pernilla ; Diez, Margarita ; Johannesson, Martina ; Flint, Jonathan ; Econs, Michael ; Turner, Charles H. ; Foroud, Tatiana. / Heterogeneous stock rat : A unique animal model for mapping genes influencing bone fragility. In: Bone. 2011 ; Vol. 48, No. 5. pp. 1169-1177.
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