Comparative proteomic analysis of dental cementum from deciduous and permanent teeth

Autor(es)

Giovani, Priscila A. ^[1] ; Martins, Luciane ^[2] ; Salmon, Cristiane R. ^[2] ; Mofatto, Luciana S. ^[3] ; Leme, Adriana F. P. ^[4] ; Puppin-Rontani, Regina M. ^[1] ; Kolli, Tamara N. ^[5] ; Foster, Brian L. ^[5] ; Nociti, Jr., Francisco H. ^[2] ; Kantovitz, Kamila R. ^{[6, 1]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Pediat Dent, Sao Paulo - Brazil

^[2] Univ Estadual Campinas, Piracicaba Dent Sch, Div Periodont, Dept Prosthodont & Periodont, Sao Paulo - Brazil

^[3] Univ Estadual Campinas, Inst Biol, Dept Genet Evolut Microbiol & Immunol, Campinas, SP - Brazil

^[4] CNPEM, LNBio, Brazilian Biosci Natl Lab, Campinas, SP - Brazil

^[5] Ohio State Univ, Coll Dent, Div Biosci, Columbus, OH 43210 - USA

^[6] Sao Leopoldo Mand Res Ctr, Dept Dent Mat, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PERIODONTAL RESEARCH; v. 56, n. 1 NOV 2020.
• Citações Web of Science: 0

Resumo

Background and Objectives Dental cementum (DC) is a mineralized tissue covering tooth roots that plays a critical role in dental attachment. Differences in deciduous vs. permanent tooth DC have not been explored. We hypothesized that proteomic analysis of DC matrix would identify compositional differences in deciduous (DecDC) vs. permanent (PermDC) cementum that might reflect physiological or pathological differences, such as root resorption that is physiological in deciduous teeth but can be pathological in the permanent dentition. Methods Protein extracts from deciduous (n = 25) and permanent (n = 12) teeth were pooled (five pools of DecDC, five teeth each; four pools of PermDC, three teeth each). Samples were denatured, and proteins were extracted, reduced, alkylated, digested, and analyzed by liquid chromatography-mass spectrometry (LC-MS/MS). The beta-binomial statistical test was applied to normalized spectrum counts with 5% significance level to determine differentially expressed proteins. Immunohistochemistry was used to validate selected proteins. Results A total of 510 proteins were identified: 123 (24.1%) exclusive to DecDC; 128 (25.1%) exclusive to PermDC; 259 (50.8%) commonly expressed in both DecDC and PermDC. Out of 60 differentially expressed proteins, 17 (28.3%) were detected in DecDC, including myeloperoxidase (MPO), whereas 43 (71.7%) were detected in PermDC, including decorin (DCN) and osteocalcin (BGLAP). Overall, Gene Ontology (GO) analysis indicated that all expressed proteins were related to GO biological processes that included localization and response to stress, and the GO molecular function of differentially expressed proteins was enriched in cell adhesion, molecular binding, cytoskeletal protein binding, structural molecular activity, and macromolecular complex binding. Immunohistochemistry confirmed the trends for selected differentially expressed proteins in human teeth. Conclusions Clear differences were found between the proteomes of DecDC and PermDC. These findings may lead to new insights into developmental differences between DecDC and PermDC, as well as to a better understanding of physiological/pathological events such as root resorption. (AU)

• Processo FAPESP: 16/02942-1 - Análise Global do Protema do Ligamento Periodontal.
• Beneficiário: Priscila Alves Giovani
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 16/13786-0 - Influência de Nova Nanotecnologia nas Propriedades Físico-Químicas-Biológicas do Cimento de Ionômero de Vidro Convencional
• Beneficiário: Kamila Rosamilia Kantovitz
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/13242-9 - Análise proteômica comparativa do cemento dental de dentes decíduos e permanentes
• Beneficiário: Priscila Alves Giovani
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado