Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Am J Hum Genet. 2010 Mar 12;86(3):434-9. doi: 10.1016/j.ajhg.2010.01.023. Epub 2010 Feb 18.

Deletion and point mutations of PTHLH cause brachydactyly type E.

Author information

  • 1Institut für Medizinische Genetik, Charité Universitätsmedizin Berlin, 13353 Berlin, Germany.

Abstract

Autosomal-dominant brachydactyly type E (BDE) is a congenital limb malformation characterized by small hands and feet predominantly as a result of shortened metacarpals and metatarsals. In a large pedigree with BDE, short stature, and learning disabilities, we detected a microdeletion of approximately 900 kb encompassing PTHLH, the gene coding for parathyroid hormone related protein (PTHRP). PTHRP is known to regulate the balance between chondrocyte proliferation and the onset of hypertrophic differentiation during endochondral bone development. Inactivation of Pthrp in mice results in short-limbed dwarfism because of premature differentiation of chondrocyte. On the basis of our initial finding, we tested further individuals with BDE and short stature for mutations in PTHLH. We identified two missense (L44P and L60P), a nonstop (X178WextX( *)54), and a nonsense (K120X) mutation. The missense mutation L60P was tested in chicken micromass culture with the replication-competent avian sarcoma leukosis virus retroviral expression system and was shown to result in a loss of function. Thus, loss-of-function mutations in PTHLH cause BDE with short stature.

Copyright 2010 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.

PMID:
20170896
[PubMed - indexed for MEDLINE]
PMCID:
PMC2833367
Free PMC Article

Images from this publication.See all images (4)Free text

Figure 1
Figure 2
Figure 3
Figure 4
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk