Accelerated hypertrophic chondrocyte kinetics in GDF-7 deficient murine tibial growth plates

Mikic, Borjana; Ferreira, Maria P; Battaglia, Todd C; Hunziker, Ernst B (2008). Accelerated hypertrophic chondrocyte kinetics in GDF-7 deficient murine tibial growth plates. Journal of orthopaedic research, 26(7), pp. 986-90. Hoboken, N.J.: Wiley 10.1002/jor.20574

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The Growth/Differentiation Factors (GDFs) are a subgroup of the Bone Morphogenetic Proteins (BMPs) well known for their role in joint formation and chondrogenesis. Mice deficient in one of these signaling molecules, GDF-5, have recently been shown to exhibit a decreased rate of endochondral bone growth in the proximal tibia due to a significantly longer hypertrophic phase duration. GDF-7 is a related family member, which exhibits a high degree of sequence identity with GDF-5. The purpose of the present study was to determine whether GDF-7 deficiency also alters the endochondral bone growth rate in mice and, if so, how this is achieved. Stereologic and cell kinetic parameters in proximal tibial growth plates from 5-week-old female GDF-7 -/- mice and wild type control littermates were examined. GDF-7 deficiency resulted in a statistically significant increase in growth rate (+26%; p = 0.0084) and rate of cell loss at the chondrosseous junction (+25%; p = 0.0217). Cells from GDF-7 deficient mice also exhibited a significantly shorter hypertrophic phase duration compared to wild type controls (-27%; p = 0.0326). These data demonstrate that, in the absence of GDF-7, the rate of endochondral bone growth is affected through the modulation of hypertrophic phase duration in growth plate chondrocytes. These findings further support a growing body of evidence implicating the GDFs in the formation, maturation, and maintenance of healthy cartilage.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Center of Regenerative Medicine for Skeletal Tissues [discontinued]
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Center of Regenerative Medicine for Skeletal Tissues [discontinued]

UniBE Contributor:

Hunziker, Ernst Bruno

ISSN:

0736-0266

ISBN:

18302280

Publisher:

Wiley

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:06

Last Modified:

04 May 2014 23:20

Publisher DOI:

10.1002/jor.20574

PubMed ID:

18302280

Web of Science ID:

000256744600014

URI:

https://boris.unibe.ch/id/eprint/28537 (FactScience: 121232)

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