The gene for high bone mass

Mark L. Johnson, Jason L. Picconi, Robert R. Recker

Research output: Contribution to journalReview article

25 Citations (Scopus)

Abstract

The mass, density, and architecture of the skeleton are adapted to enable it to perform its mechanical, protective, and metabolic functions. Osteoporosis is a condition of lost adaptation characterized by decreased skeletal mass and density and increased skeletal fragility. Many diseases result in increased bone density, including osteopetrosis and Paget's disease, but deformities or bony lesions with decreased skeletal integrity usually accompany these conditions. We have identified a kindred with high bone mass (HBM) yet normally shaped bones. Linkage analysis localized the gene for the HBM trait to chromosome 11 (11q12-13). Subsequent physical mapping and mutation analysis have identified the cause as a point mutation in the LDL receptor-related protein 5 (Lrp5) gene that results in a valine substitution for glycine at position 171 in the protein. This protein is important in the Wnt signaling pathway. The authors have hypothesized that the Lrp5 gene/pathway is part of the mechanism by which bone senses mechanical load. Increased bone strength, HBM, and a phenotype resembling our human kindred develop in transgenic mice carrying the human Lrp5 gene with the HBM mutation. Recent data indicate that the HBM mutation reduces the threshold for response of the skeleton to mechanical load resulting in an overadaptation to normal mechanical loads. This discovery has opened the door to understanding one of the most important paradigms in bone biology, how bones respond and adapt to mechanical loading. Understanding the mechanosensation pathway and its regulation will lead us to new treatments for osteoporosis.

Original languageEnglish
Pages (from-to)445-453
Number of pages9
JournalEndocrinologist
Volume12
Issue number5
StatePublished - Sep 2002

Fingerprint

Bone and Bones
Low Density Lipoprotein Receptor-Related Protein-1
Genes
Skeleton
Mutation
Osteoporosis
Osteopetrosis
Chromosomes, Human, Pair 11
Wnt Signaling Pathway
Valine
Point Mutation
Bone Density
Glycine
Transgenic Mice
Proteins

All Science Journal Classification (ASJC) codes

  • Endocrinology

Cite this

Johnson, M. L., Picconi, J. L., & Recker, R. R. (2002). The gene for high bone mass. Endocrinologist, 12(5), 445-453.

The gene for high bone mass. / Johnson, Mark L.; Picconi, Jason L.; Recker, Robert R.

In: Endocrinologist, Vol. 12, No. 5, 09.2002, p. 445-453.

Research output: Contribution to journalReview article

Johnson, ML, Picconi, JL & Recker, RR 2002, 'The gene for high bone mass', Endocrinologist, vol. 12, no. 5, pp. 445-453.
Johnson ML, Picconi JL, Recker RR. The gene for high bone mass. Endocrinologist. 2002 Sep;12(5):445-453.
Johnson, Mark L. ; Picconi, Jason L. ; Recker, Robert R. / The gene for high bone mass. In: Endocrinologist. 2002 ; Vol. 12, No. 5. pp. 445-453.
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