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Modification of the proteoglycans of rat incisor dentin – predentin during in vivo fluorosis
Author(s) -
Hall Rachel C.,
Embery Graham,
Waddington Rachel J.
Publication year - 1996
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1996.tb00079.x
Subject(s) - chemistry , glycosaminoglycan , dermatan sulfate , chondroitin sulfate , demineralization , dentin , biochemistry , sepharose , ion chromatography , chromatography , enzyme , dentistry , enamel paint , medicine
Proteoglycans (PGs) were isolated from the dentin–predentin of fluorotic and control rat incisor teeth using demineralization in EDTA, followed by extraction with 4 M guanidinium chloride in the presence of protease inhibitors. Differences in the behaviour of fluorotic and control PG were evident during purification by anion exchange chromatography on Q‐Sepharose and MONO‐Q interfaced with fast protein liquid chromatography. The PG from fluorotic teeth exhibited a more anionic profile, due to changes in glycosaminoglycan characteristics, since no apparent differences were evident between the respective core proteins, both of which were 45 kDa. The constituent glycosaminoglycan chains of fluorotic dentin were of lower molecular size and showed the additional presence of dermatan sulfate and heparan sulfate by comparison to non‐fluorotic controls, where only chondroitin‐4‐sulfate was detected.