Extracellular vesicles-associated miRNAs in triple-negative breast cancer: from tumor biology to clinical relevance.

Breast cancer (BC), a heterogeneous group of diseases, is the most frequent type and the leading cause of cancer-related death among women worldwide. Tumor heterogeneity directly impacts cancer progression and treatment, as evidenced by the patients´ diverse prognosis and treatment responses across the distinct molecular subtypes. Triple-negative breast cancer (TNBC), which accounts for 10-20% of all diagnosed BC cases, is an aggressive BC subtype with a challenging prognosis. Current treatment options include systemic chemotherapy and/or target therapies based on PARP and PD-L1 inhibitors for eligible patients. MicroRNAs (miRNAs) are important regulatory non-coding RNAs (ncRNAs) in TNBC tumorigenesis. These molecules are present both intracellularly and released into biofluids, packaged into extracellular vesicles (EVs). Emerging evidence indicates that EVs-associated miRNAs (EVs-miRNAs), transferred from parental to recipient cells, are key mediators of cell-to-cell communication. Considering their stability and abundance in several biofluids, these molecules may reflect the epigenomic composition of their tumors of origin and contribute to mediate tumorigenesis, similar to their intracellular counterparts. This review provides the current knowledge on EVs-miRNAs in the TNBC subtype, focusing on their role in regulating mRNA targets involved in tumor phenotypes and their clinical relevance as promising biomarkers in liquid biopsies.

Epigenomic integrative analysis pinpoint master regulator transcription factors associated with tumorigenesis in squamous cell carcinoma of oral tongue.

Head and Neck Cancer (HNC) is a heterogeneous group of cancers, which includes cancers arising in the oral cavity, nasopharynx, oropharynx, hypopharynx, and larynx. Epidemiological studies have revealed that several factors such as tobacco and alcohol use, exposure to environmental pollutants, viral infection, and genetic factors are risk factors for developing HNC. The squamous cell carcinoma of oral tongue (SCCOT), which is significantly more aggressive than the other forms of oral squamous cell carcinoma, presents a propensity for rapid local invasion and spread, and a high recurrence rate. Dysregulation in the epigenetic machinery of cancer cells might help uncover the mechanisms of SCOOT tumorigenesis. Here, we used DNA methylation changes to identify cancer-specific enhancers that were enriched for specific transcription factor binding sites (TFBS), and potential master regulator transcription factors (MRTF) associated with SCCOT. We identified the activation of MRTFs associated with increased invasiveness, metastasis, epithelial-to-mesenchymal transition, poor prognosis, and stemness. On the other hand, we found the downregulation of MRTFs associated with tumor suppression. The identified MRTFs should be further investigated to clarify their role in oral cancer tumorigenesis and for their potential use as biological markers.

Development, validation and international certification of a health portal for people with disabilities.

OBJECTIVES: to develop, validate with specialists and internationally certify a virtual health portal, the D+Informação. METHODS: a quantitative methodological study. Twenty-two expert judges validated the Portal in the health and computer science areas using the Content Validity Index and the Gwet test. International certification followed HONcode principles® to ensure the trust of information. RESULTS: judges of health and computer science validated the portal obtaining a minimum Content Validity Index in more than 75% of the topics, in addition to the evaluation of general agreement, 0.253; content evaluation, 0.193, and interface evaluation, 0.230. All presented the value of Gwet with p ≤ 0,001. CONCLUSIONS: the portal D+Informação was developed, validated, internationally certified and is hosted on this website: https://demaisinformacao.com.br.

Development, validation and international certification of a health portal for people with disabilities / Desarrollo, validación y certificación internacional de un portal de salud para personas con discapacidad / Desenvolvimento, validação e certificação internacional de um portal de saúde para pessoas com deficiência

ABSTRACT Objectives: to develop, validate with specialists and internationally certify a virtual health portal, the D+Informação. Methods: a quantitative methodological study. Twenty-two expert judges validated the Portal in the health and computer science areas using the Content Validity Index and the Gwet test. International certification followed HONcode principles® to ensure the trust of information. Results: judges of health and computer science validated the portal obtaining a minimum Content Validity Index in more than 75% of the topics, in addition to the evaluation of general agreement, 0.253; content evaluation, 0.193, and interface evaluation, 0.230. All presented the value of Gwet with p ≤ 0,001. Conclusions: the portal D+Informação was developed, validated, internationally certified and is hosted on this website: https://demaisinformacao.com.br

RESUMEN Objetivos: desarrollar, validar con especialistas y certificar internacionalmente un portal virtual de salud, el D+Informação. Métodos: estudio metodológico cuantitativo. La validación del Portal fue hecha por 22 jueces especialistas en las áreas de salud y de la informática utilizando el Índice de Validez de Contenido y el test de Gwet. La certificación internacional siguió los principios del HONcode® para garantizar la confianza de las informaciones. Resultados: el Portal fue validado por los jueces de salud y de la informática obteniendo Índice de Validez de Contenido mínimo en más de 75% de los tópicos, además la evaluación de concordancia general, 0,253; evaluación de contenido, 0,193; y evaluación de la interface, 0,230. Todos presentaron el valor de Gwet con p ≤ 0,001. Conclusiones: el Portal D+Informação fue desarrollado, validado, certificado internacionalmente y está hospedado en la siguiente dirección electrónica: https://demaisinformacao.con.br

RESUMO Objetivos: desenvolver, validar com especialistas e certificar internacionalmente um portal virtual de saúde, o D+Informação. Métodos: estudo metodológico quantitativo. A validação do Portal foi feita por 22 juízes especialistas nas áreas da saúde e da informática utilizando o Índice de Validade de Conteúdo e o teste de Gwet. A certificação internacional seguiu os princípios do HONcode® para garantir a confiança das informações. Resultados: o Portal foi validado pelos juízes da saúde e da informática obtendo Índice de Validade de Conteúdo mínimo em mais de 75% dos tópicos, além da avaliação de concordância geral, 0,253; avaliação de conteúdo, 0,193; e avaliação da interface, 0,230. Todos apresentaram o valor de Gwet com p ≤ 0,001. Conclusões: o Portal D+Informação foi desenvolvido, validado, certificado internacionalmente e encontra-se hospedado neste endereço eletrônico: https://demaisinformacao.com.br