title: Transforming growth factor-beta1 negatively regulates crystallin expression in teeth.
abstract: Previously, we have reported that targeted overexpression of transforming growth factor (TGF) beta1 in the teeth of the transgenic mice (dTGF-beta1) results in a novel tooth phenotype phenomimicking the most prevalent tooth disorders in human. This phenotype was associated with discoloration and attrition of teeth due to defective mineralization. Here, we report a novel expression of crystallin family members in developing mouse teeth and its regulation by TGF-beta1 in these transgenic mice. AlphaB- and beta-crystallins were found to be elevated in dTGF-beta1 mouse teeth, whereas gamma-crystallin (gammaB, gammaC, and gammaF), a marker of cell differentiation, was significantly reduced. Because crystallins are believed to be stress-related proteins, their expression in teeth implicates them in a similar role because teeth are constantly subjected to physical friction and temperature fluctuations.
authors.affiliation: Functional Genomics Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: Tamizchelvi
authors.initials: T
authors.lastname: Thyagarajan
authors.forename: Ashok B
authors.initials: AB
authors.lastname: Kulkarni
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003459:Crystallins / Q000235:genetics* / Q000502:physiology; D003805:Dentin Dysplasia / Q000209:etiology / Q000235:genetics; D003811:Dentinogenesis Imperfecta / Q000209:etiology / Q000235:genetics; D015870:Gene Expression; D006801:Humans; D051379:Mice; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D009805:Odontogenesis / Q000235:genetics / Q000502:physiology; D010641:Phenotype; D020543:Proteome; D012313:RNA / Q000235:genetics / Q000378:metabolism; D014070:Tooth / Q000502:physiology*; D016212:Transforming Growth Factor beta / Q000235:genetics / Q000502:physiology*; D053773:Transforming Growth Factor beta1
chemical_list: D003459:Crystallins; D020543:Proteome; C508960:TGFB1 protein, human; C508961:Tgfb1 protein, mouse; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D012313:RNA