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Bergamo AZN, Madalena IR, Omori MA, Ramazzotto LA, Nelson-Filho P, Baratto-Filho F, Proff P, Kirschneck C, Küchler EC. Estrogen deficiency during puberty affects the expression of microRNA30a and microRNA503 in the mandibular condyle. Ann Anat 2021; 240:151865. [PMID: 34813926 DOI: 10.1016/j.aanat.2021.151865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/18/2021] [Accepted: 11/11/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND The aim of this study was investigated if estrogen deficiency during puberty affects the expression of miRNA30a and miRNA503 in maxillary and mandibular growth centers, and also evaluated if ERα and ERβ are correlated with miRNA30a and miRNA503 expressions. METHODS Samples from 12 female Wistar rats randomized into experimental group (OVX) and control group (SHAM). At an age of 45 days animals were euthanized for miRNA expression analyses. RT-qPCR was performed to determine miRNA30a and miRNA503 expression in growth sites: midpalatal suture, condyle, mandibular angle, symphysis/parasymphysis and coronoid process. The data was carried out using the parametric tests at 5% of significance level. RESULTS miRNA 30a and miRNA503 presented higher levels in the condylar site in SHAM group when compared with OVX (p = 0.002 and p = 0.020, respectively). In the growth centers, a statistical significant difference was observed only for miRNA30a (p = 0.004), when compared mandibular angle with condyle the in OVX group (p = 0.001). A strong positive correlation between miRNA503 and ERα in the condyle of OVX group was observed (r = 0.90; p = 0.039 and it also between miRNA503 and ERβ in the coronoid process of the OVX group (r = 0.88; p = 0.05). CONCLUSION The results suggested that estrogen regulates specific miRNAs in maxillary and mandibular growth centers, which may participate in posttranscriptional regulation of estrogen-regulated genes.
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Affiliation(s)
- Ana Zilda Nazar Bergamo
- Department of Pediatric Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Isabela Ribeiro Madalena
- Department of Pediatric Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Dentistry, University of the Region of Joinville, Joinville, SC, Brazil; Department of Restorative Dentistry, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Marjorie Ayumi Omori
- Department of Pediatric Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Lucas Alexandre Ramazzotto
- Department of Pediatric Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; Biotechnology Graduation, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Paulo Nelson-Filho
- Department of Pediatric Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Flares Baratto-Filho
- Department of Dentistry, University of the Region of Joinville, Joinville, SC, Brazil
| | - Peter Proff
- Department of Orthodontics, University Medical Centre of Regensburg, Germany
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