Matrix and gene expression in the rat cranial base growth plate.

Matrix and gene expression in the rat cranial base growth plate. Research Abstract Details 

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Matrix and gene expression in the rat cranial base growth plate. Abstract Text:

Minghui Tang,Jeremy J Mao,

Recent data have shown that the proliferation and differentiation of the cranial base growth plate (CBGP) chondrocytes are modulated by mechanical stresses. However, little is known about the expression of genes and matrix molecules in the CBGP during development or under mechanical stresses. The objective of the present study was to determine whether several cartilage- and bone-related molecules are expressed in the CBGP and whether their expression is modulated by cyclic loading. The CBGP of normal 8-day-old rats (n=8) were isolated immediately after death, followed by extraction of total RNA and reverse transcription/polymerase chain reaction (RT-PCR) analysis. All studied genes, including type II and X collagens, biglycan, versican, osteocalcin, osteopontin, and fetal liver kinase 1, were expressed in the CBGP with a reproducible absence of decorin mRNA. In age- and sex-matched rats (n=10), exogenous cyclic forces were applied to the maxilla at 500 mN and 4 Hz for 20 min/day over 2 days, followed by RNA isolation and RT-PCR analysis. This exogenous cyclic loading consistently induced the expression of the decorin gene, which was non-detectable, by the current RT-PCR approach, in control neonatal CBGPs without loading. Immunolocalization of several of the above-studied gene products demonstrated their remarkable site-specific expression. Decorin proteoglycan was primarily expressed in the perichondrium instead of various cartilage growth zones, especially upon mechanical loading. These findings serve as baseline data for the expression of several genes and gene products in the neonatal CBGP. Mechanical modulation of decorin expression is consistent with recent reports of its susceptibility to mechanical loading in several connective tissues.

Matrix and gene expression in the rat cranial base growth plate. Publishing Authors By Initials

M Tang,JJ Mao,

For similar carbohydrates: polysaccharides: proteoglycans: proteochondroitin sulfates: versicans research abstracts see: carbohydrates: polysaccharides: proteoglycans: proteochondroitin sulfates: versicans research

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Matrix and gene expression in the rat cranial base growth plate. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Cell and tissue research

VOLUME: 324

Page Numbers: 467-74

Journal Abbreviation: Cell Tissue Res.

ISSN: 0302-766X

DAY: 7

MONTH: 03

YEAR: 2006

Matrix and gene expression in the rat cranial base growth plate. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 417625

Matrix and gene expression in the rat cranial base growth plate. Keywords Mesh Terms:

KEYWORDS: Versicans

MESH TERMS: metabolism

Chemical & Substance for Abstract: Matrix and gene expression in the rat cranial base growth plate. Information

Substance Name: Vascular Endothelial Growth Factor Recep

Registry Number: EC 2.7.1.112

Grant and Affiliation Information for Matrix and gene expression in the rat cranial base growth plate.

AFFILIATION: Tissue Engineering Laboratory, Rm 237, University of Illinois at Chicago MC 841, 801 South Paulina Street, Chicago, IL 60612-7211, USA.

Country: Germany

AGENCY: United States NIBIB

GRANT: EB02332

ACRONYM: EB

MEDLINETA: Cell Tissue Res

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