Distribution of small integrin-binding ligand, N-linked glycoproteins (SIBLING) in the condylar cartilage of rat mandible.

International Journal of Oral and Maxillofacial Surgery
Yao SunC Qin

Abstract

The Small Integrin-Binding LIgand, N-linked Glycoprotein (SIBLING) family is one category of non-collagenous proteins closely related to osteogenesis. In this study, the authors systematically evaluated the presence and distribution of four SIBLING family members, dentin sialophosphoprotein (DSPP), dentin matrix protein 1 (DMP1), bone sialoprotein (BSP) and osteopontin (OPN), in rat mandibular condylar cartilage using protein chemistry and immunohistochemistry. For protein chemistry, SIBLING proteins in the dissected condylar cartilage were extracted with 4M guanidium-HCl, separated by ion-exchange chromatography, and analyzed by Western immunoblotting. Immunohistochemistry was employed to assess the distribution of these four SIBLING proteins in the condylar cartilage of 2-, 5- and 8-week-old rats. Results from both approaches showed that all four members are expressed in the condylar cartilage. DSPP, unlike that observed in dentin and bone, exists as a full-length form (uncleaved) in the condylar cartilage. The NH(2)-terminal fragment of DMP1 is mainly detected in the matrix of the cartilage while the COOH-terminal fragment is primarily localized in the nuclei of cells in the chondroblastic and hypertrophic layers. The data o...Continue Reading

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Citations

Jul 17, 2012·The Journal of Biological Chemistry·Qinglin ZhuChunlin Qin
May 11, 2011·Cells, Tissues, Organs·Yao SunChunlin Qin
Aug 4, 2010·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Yao SunChunlin Qin
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Nov 27, 2020·Frontiers in Physiology·Ce ShiQilin Liu

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