Could be FOXO3a, miR-96-5p and miR-182-5p useful for Brazilian women with luminal A and triple negative breast cancers prognosis and target therapy?

Autor(es)

Daniele Carvalho Calvano Mendes ^[1] ; Carlos Marino Cabral Calvano Filho ; Natália Garcia ^[3] ; Marcos Desidério Ricci ^[4] ; José Maria Soares Júnior ^[5] ; Katia Candido Carvalho ^[6] ; Edmund Chada Baracat ^[7]

Afiliação do(s) autor(es)

^[1] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

^[3] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

^[4] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

^[5] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

^[6] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

^[7] Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, HCFMUSP. Departamento de Obstetrícia e Ginecologia. Disciplina de Ginecologia - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Clinics; v. 78, 2023-02-27.

Resumo

Abstract FOXO3a dysregulation is frequently implicated in tumorigenesis, and its inhibition can occur by several molecular mechanisms. Among these, post-transcriptional suppression by miRNAs has been associated with various cancers initiation. Here, we assessed the expression profiles of the most relevant miRNAs for breast tumorigenesis, using Luminal A (LA) and Triple-Negative (TN) breast cancer from Brazilian patients, by the quantitative real time-PCR method. Their potential prognostic role for the patients was also evaluated. We identified the miRNAs miR-96-5p and miR-182-5p, de-scribed as negative regulators of FOXO3A, with differential expression both in LA and TN tumors when compared to normal tissue. The miR-96-5p and miR-182-5p miRNAs were upregulated in LA (7.82 times, p < 0.005; 6.12 times, p < 0.005, respectively) and TN breast cancer samples (9.42 times, p < 0.0001; 8.51 times, p < 0.0001) compared to normal tissues. The samples with higher miR-96-5p and miR-182-5p expression (FR ≥ 4) were submitted for FOXO3a immunostaining. Reduced protein detection was observed in all of the tumors compared to normal tissues. The most prominent miRNA expression and FOXO3a protein suppression were observed in TN samples (p < 0.001), indicating the relevant role of these molecules in this tumor biology and clinical behavior. Our results corroborate the literature regarding to the relevance of FOXO3a in the breast cancer, and they open new perspectives for alternative target therapy options for Brazilian patients expressing both FOXO3a and its regulatory miRNAs. (AU)

• Processo FAPESP: 10/16824-4 - Caracterização da população celular de câncer de mama a partir da expressão de microRNA em tumores com receptores de estrogênio e progesterona positivos e Her 2 negativo e em tumores com receptores de estrogênio e progesterona e Her 2 negativos
• Beneficiário: Edmund Chada Baracat
• Modalidade de apoio: Auxílio à Pesquisa - Regular