title: Kinetics of gene expression of alkaline phosphatase during healing of alveolar bone in rats.
abstract: Immunohistochemical studies and molecular biology have enabled us to identify numerous proteins that are involved in the metabolism of bone, and their encoding genes. Among these is alkaline phosphatase (ALP), an enzyme that is responsible for the initiation of mineralisation of the extracellular matrix during alveolar bone repair. To evaluate the gene expression of ALP during this process, we studied nine healthy adult male rats, which had their maxillary central incisors extracted from the right side and were randomly divided into three groups. During three experimental periods, 7 days, 14 days, and 28 days, the alveoli were curetted, the rats killed, and samples analysed by real-time reverse transcription polymerase chain reaction (qRT-PCR). The RNAm that encodes the gene for the synthesis of ALP was expressed during the three periods analysed, but its concentration was significantly increased at 14 and 28 days compared with at 7 days. There was no significant difference between 14 and 28 days (p=0.0005). We conclude that genes related to ALP are expressed throughout the healing process and more intensively during the later periods (14 and 28 days), which coincides with the increased formation of mineralised bone.
authors.affiliation: Surgery & Integrated Clinic Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil. Electronic address: ortowill@yahoo.com.br.
authors.forename: Willian Caetano
authors.initials: WC
authors.lastname: Rodrigues
authors.affiliation: Surgery & Integrated Clinic Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil.
authors.forename: André Luís da Silva
authors.initials: AL
authors.lastname: Fabris
authors.affiliation: Basic Sciences Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil.
authors.forename: Jaqueline Suemi
authors.initials: JS
authors.lastname: Hassumi
authors.affiliation: Basic Sciences Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil.
authors.forename: Alaíde
authors.initials: A
authors.lastname: Gonçalves
authors.affiliation: Surgery & Integrated Clinic Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil.
authors.forename: Celso Koogi
authors.initials: CK
authors.lastname: Sonoda
authors.affiliation: Basic Sciences Department, Araçatuba Dental School, São Paulo State University "Júlio de Mesquita Filho" (UNESP), Araçatuba, São Paulo, Brazil.
authors.forename: Roberta
authors.initials: R
authors.lastname: Okamoto
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism*; D000539:Alveolar Process / Q000378:metabolism*; D000818:Animals; D001842:Bone and Bones; D002113:Calcification, Physiologic; D007700:Kinetics; D008297:Male; D051381:Rats; D014945:Wound Healing
chemical_list: D000469:Alkaline Phosphatase
keywords: alkaline phosphatase; alveolar bone repair; bone biology; gene expression; mineralization; tooth socket