Natacha M M da Costa1, Adriane S de Siqueira2, André L R Ribeiro3, Maria S da Silva Kataoka1, Ruy G Jaeger4, Sérgio M de Alves-Júnior1, Andrew M Smith5,6, João de Jesus Viana Pinheiro7. 1. Cell Culture Laboratory, School of Dentistry, Federal University of Pará, Rua Augusto Corrêa, 01, Guamá, Belém, PA, 66075110, Brazil. 2. School of Dentistry, Universidade Positivo, Av. Prof. Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, 80740-050, Brazil. 3. Department of Oral and Maxillofacial Surgery, University Center of Para-CESUPA, Belem, Brazil. 4. Department of Cell and Developmental Biology Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 1524, Ed. Biomédicas 1, São Paulo, SP, 05508-000, Brazil. 5. Department of Microbial Diseases, Eastman Dental Institute, University College London, London, UK. 6. The Rayne Building, Centre for Molecular Medicine, 5 University Street, London, WC1E 6JF, UK. 7. Cell Culture Laboratory, School of Dentistry, Federal University of Pará, Rua Augusto Corrêa, 01, Guamá, Belém, PA, 66075110, Brazil. radface@hotmail.com.
Abstract
OBJECTIVES: Odontogenic cysts and tumors are the most relevant lesions that affect the gnathic bones. These lesions have in common the formation of cystic areas and this common feature may suggest involvement of similar mechanisms. The hypoxia inducible factor 1 alpha (HIF-1α), a responsive protein to hypoxia and caspase-3, an irreversible apoptosis marker, may contribute to cyst formation. Thus, this study aimed to investigate the immunoexpression of these proteins in odontogenic cysts and tumors. MATERIAL AND METHODS: Twenty cases of ameloblastoma, keratocystic odontogenic tumor (KOT) (n = 20), radicular cyst (RC) (n = 18), dentigerous cyst (DC) (n = 11), calcifying cystic odontogenic tumor (n = 8), and dental follicle (DF) (n = 10) were used to investigate HIF-1α and caspase-3 expression in sequential serial cuts by immunohistochemistry. RESULTS: HIF-1α was overexpressed in RC, DC, and ameloblastoma when compared with DF. The basal and sometimes the lower suprabasal layer showed no or very low expression in DC, KOT, and ameloblastoma, the last also showing strong expression in solid epithelial areas and initial cystic formation regions. Caspase-3 was found to be overexpressed in all lesions, with the highest expression in odontogenic cysts compared to tumors. HIF-1α and caspase-3 were localized in similar areas of the same lesions, especially in the epithelium surrounding cystic formations. CONCLUSIONS: This study showed distinct immunoexpression of HIF-1α and caspase-3 in odontogenic cyst and tumors, with higher expression observed in odontogenic cysts. CLINICAL RELEVANCE: These findings suggest a possible correlation between hypoxia, apoptosis, and cystogenesis, leading to understand the mechanisms responsible to cystic formation in odontogenic lesions.
OBJECTIVES:Odontogenic cysts and tumors are the most relevant lesions that affect the gnathic bones. These lesions have in common the formation of cystic areas and this common feature may suggest involvement of similar mechanisms. The hypoxia inducible factor 1 alpha (HIF-1α), a responsive protein to hypoxia and caspase-3, an irreversible apoptosis marker, may contribute to cyst formation. Thus, this study aimed to investigate the immunoexpression of these proteins in odontogenic cysts and tumors. MATERIAL AND METHODS: Twenty cases of ameloblastoma, keratocystic odontogenic tumor (KOT) (n = 20), radicular cyst (RC) (n = 18), dentigerous cyst (DC) (n = 11), calcifying cystic odontogenic tumor (n = 8), and dental follicle (DF) (n = 10) were used to investigate HIF-1α and caspase-3 expression in sequential serial cuts by immunohistochemistry. RESULTS: HIF-1α was overexpressed in RC, DC, and ameloblastoma when compared with DF. The basal and sometimes the lower suprabasal layer showed no or very low expression in DC, KOT, and ameloblastoma, the last also showing strong expression in solid epithelial areas and initial cystic formation regions. Caspase-3 was found to be overexpressed in all lesions, with the highest expression in odontogenic cysts compared to tumors. HIF-1α and caspase-3 were localized in similar areas of the same lesions, especially in the epithelium surrounding cystic formations. CONCLUSIONS: This study showed distinct immunoexpression of HIF-1α and caspase-3 in odontogenic cyst and tumors, with higher expression observed in odontogenic cysts. CLINICAL RELEVANCE: These findings suggest a possible correlation between hypoxia, apoptosis, and cystogenesis, leading to understand the mechanisms responsible to cystic formation in odontogenic lesions.
Authors: André Luis Ribeiro Ribeiro; Natacha Malu Miranda da Costa; Adriane Sousa de Siqueira; Walessa Brasil da Silva; Maria Sueli da Silva Kataoka; Ruy Gastaldoni Jaeger; Sérgio de Melo Alves-Junior; Andrew M Smith; João de Jesus Viana Pinheiro Journal: Oral Surg Oral Med Oral Pathol Oral Radiol Date: 2016-06-22
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Authors: Katherine Julissa Palma Valladares; Karolyny Martins Balbinot; Antonia Taiane Lopes de Moraes; Maria Sueli da Silva Kataoka; Aline Maria Pereira Cruz Ramos; Rommel Thiago Jucá Ramos; Artur Luiz da Costa da Silva; Ricardo Alves Mesquita; David Normando; Sérgio de Melo Alves Júnior; João de Jesus Viana Pinheiro Journal: Int J Dent Date: 2021-12-27