| Title: |
MMP13 Expression and Activity Suggest Its Role in Bone Resorption in Ameloblastomas. |
| Authors: |
Valeriano, Alline Teixeira1 (AUTHOR), Camara, Lais Santos1 (AUTHOR), Bernardes, Vanessa de Fátima1 (AUTHOR), Pais, Fabiano Sviatopolk‐Mirsky2 (AUTHOR), Araújo, Flávio Marcos Gomes2 (AUTHOR), Salim, Anna Christina de Matos2 (AUTHOR), Fernandes, Gabriel da Rocha2 (AUTHOR), Stussi, Fernanda3 (AUTHOR), Gomes, Carolina Cavalieri1 (AUTHOR), de Andrade Santos, Pedro Paulo4 (NURSE), de Souza, Lélia Batista5 (NURSE), Gomez, Ricardo Santiago6 (AUTHOR), Diniz, Marina Gonçalves1 (AUTHOR) marinadiniz@gmail.com |
| Source: |
Journal of Oral Pathology & Medicine. Oct2024, Vol. 53 Issue 9, p577-583. 7p. |
| Subject Terms: |
*ODONTOGENIC tumors, *BONE resorption, *AMELOBLASTOMA, *MATRIX metalloproteinases, *BENIGN tumors |
| Abstract: |
Background: Ameloblastoma is a locally destructive benign odontogenic tumor. While the neoplastic cells of conventional ameloblastoma can infiltrate the connective tissue and bone, in unicystic ameloblastoma the epithelium is encapsulated. The mechanisms driving ameloblastoma's bone resorption remains unclear. Methods: RNA sequencing (RNA‐seq) was performed in a discovery cohort of conventional ameloblastoma, and pathway enrichment analysis was carried out. mRNA levels of MMP13, a gene associated with bone resorption, were assessed using RT‐qPCR in a larger cohort of conventional ameloblastoma and in unicystic ameloblastoma. Zymogram gels and the immunoexpression profile of collagenase 3 (encoded by MMP13 gene) were evaluated as well. Results: Enriched pathways related to bone mineralization and upregulation of MMP13 were observed in ameloblastomas. Collagenolytic activity of collagenase 3 was detected in the tumor lysates. Collagenase 3 immunopositivity was observed in ameloblastomatous epithelium infiltrating the fibrous capsule of unicystic ameloblastoma. At the tumor–bone interface, collagenase 3 expression was detected in stromal cells, osteoblasts, and osteocytes. Conclusion: The results indicate a potential involvement of MMP13 in ameloblastoma‐related bone resorption and progression. [ABSTRACT FROM AUTHOR] |
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