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Fucoidan/chitosan nanoparticles functionalized with anti-ErbB-2 target breast c...
Oliveira, Catarina; Gonçalves, Céline S.; Martins, Eduarda P.; Neves, N. M.; Reis, R. L.; Costa, Bruno M.; Silva, Tiago H.; Martins, AlbinoThe work herein presented reports the development of fucoidan/chitosan nanoparticles (NPs) loaded with gemcitabine and functionalized with ErbB-2 antibody at their surface (NPs + Gem + Ab). The maximum immobilization of ErbB-2 on NPs' surface was set at 10 mu g mL(-1) and resulted in NPs with a size around 160 nm, a polydispersity index of 0.18, and a zeta potential of 21 mV. ErbB-2 is overexpressed in some sub...
MCT1 is a new prognostic biomarker and its therapeutic inhibition boosts respon...
Gonçalves, Vera Miranda; Gonçalves, Céline S.; Granja, Sara; Castro, Joana Vieira de; Reis, Rui M.; Costa, Bruno M.; Baltazar, Fátima; Granja, SaraGlioblastoma, the brain tumour with highest prevalence and lethality, exhibits a characteristic glycolytic phenotype with increased lactate production. Recently, we reported a MCT1 overexpression in GBMs tumours, being associated to tumour growth and aggressiveness. Thus, we aimed to disclose the role of MCT1 in GBM prognosis and in vivo therapy response. Importantly, MCT1 overexpression is associated with poor...
A novel molecular link between HOXA9 and WNT6 in glioblastoma identifies a subg...
Gonçalves, Céline S.; Xavier‐Magalhães, Ana; Martins, Eduarda P.; Pinto, Afonso A.; Pires, Manuel; Pinheiro, Célia; Reis, Rui M.; Sousa, NunoDespite much effort to improve treatments, patients with malignant glioma still present a very poor prognosis that has not changed significantly in the last decades. In this context, it is crucial to better understand glioma pathogenesis to identify new molecular prognostic subgroups and therapeutic targets. WNT6 was recently identified as a new oncogenic molecule in glioblastoma (GBM), with prognostic value in...
Overexpression of circulating MiR-30b-5p identifies advanced breast cancer
Estevão-Pereira, Helena; Lobo, João; Salta, Sofia; Amorim, Maria; Lopes, Paula; Cantante, Mariana; Reis, Berta; Antunes, Luís; Castro, FernandoBreast cancer (BrC) remains the leading cause of cancer-related death in women, mainly due to recurrent and/or metastatic events, entailing the need for biomarkers predictive of progression to advanced disease. MicroRNAs hold promise as noninvasive cancer biomarkers due to their inherent stability and resilience in tissues and bodily fluids. There is increasing evidence that specific microRNAs play a functional...
WNT6 is a novel oncogenic prognostic biomarker in human glioblastoma
Gonçalves, Céline S.; Castro, Joana Isabel Martins Cosme Vieira; Pojo, Marta; Martins, Eduarda P.; Queirós, Sandro Filipe Monteiro; Chautard, EmmanuelGlioblastoma (GBM) is a universally fatal brain cancer, for which novel therapies targeting specific underlying oncogenic events are urgently needed. While the WNT pathway has been shown to be frequently activated in GBM, constituting a potential therapeutic target, the relevance of WNT6, an activator of this pathway, remains unknown. Methods: WNT6 protein and mRNA levels were evaluated in GBM. WNT6 levels were...
Effects of the functional HOTAIR rs920778 and rs12826786 genetic variants in gl...
Xavier-Magalhães, Ana; Oliveira, Ana Isabel Ferreira; de Castro, Joana Vieira; Pojo, Marta; Gonçalves, Céline S.; Lourenço, TatianaAbnormal expression of the long non-coding RNA HOX transcript antisense intergenic RNA (HOTAIR) is oncogenic in several human cancers, including gliomas. The HOTAIR single nucleotide polymorphisms (SNPs) rs920778 (C > T) and rs12826786 (C > T) present in the intronic enhancer and promoter regions of HOTAIR, respectively, are associated with expression, cancer susceptibility, and patient prognosis in some tumor ...
Histone methyltransferase PRMT6 plays an oncogenic role of in prostate cancer
Almeida-Rios, Diogo; Pinho dos Santos Graça, Maria Inês; Quintela Vieira, Ana Filipa; Ramalho-Carvalho, João; Pereira-Silva, Eva; Martins, Ana TeresaProstate cancer (PCa) is a major cause of morbidity and mortality. Until now the specific role of histone methyltransferases (HMTs) deregulated expression/activity in PCa is poorly understood. Herein we aimed to uncover the potential oncogenic role of PRMT6 in prostate carcinogenesis. PRMT6 overexpression was confirmed in PCa, at transcript and protein level. Stable PRMT6 knockdown in PC-3 cells attenuated mali...
A transcriptomic signature mediated by HOXA9 promotes human glioblastoma initia...
Pojo, Marta; Gonçalves, Céline S.; Magalhães, Ana Xavier; Oliveira, Ana Isabel; Gonçalves, Tiago; Correia, Sara; Rodrigues, Ana JoãoGlioblastoma is the most malignant brain tumor, exhibiting remarkable resistance to treatment. Here we investigated the oncogenic potential of HOXA9 in gliomagenesis, the molecular and cellular mechanisms by which HOXA9 renders glioblastoma more aggressive, and how HOXA9 affects response to chemotherapy and survival. The prognostic value of HOXA9 in glioblastoma patients was validated in two large datasets from...
Transcriptional profiling of HOXA9-regulated genes in human glioblastoma cell m...
Gonçalves, Céline S.; Magalhães, Ana Xavier; Pojo, Marta; Oliveira, Ana Isabel; Reis, R. M.; Sousa, Nuno; Rocha, Miguel; Costa, Bruno MarquesThe data here described pertain to the article by Pojo et al. (2015) titled A transcriptomic signature mediated by HOXA9 promotes human glioblastoma initiation, aggressiveness and resistance to temozolomide (Pojo, Goncalves et al. 2015). HOX genes are part of the homeobox genes family, which encodes transcription factors crucial during embryonic development [6] and [9] and also in postdevelopmental regulation [...
MicroRNA-375 plays a dual role in prostate carcinogenesis
Costa-Pinheiro, Pedro; Ramalho-Carvalho, João; Vieira, Filipa Quintela; Torres-Ferreira, Jorge; Oliveira, Jorge; Gonçalves, Céline S.Background: Prostate cancer (PCa), a highly incident and heterogeneous malignancy, mostly affects men from developed countries. Increased knowledge of the biological mechanisms underlying PCa onset and progression are critical for improved clinical management. MicroRNAs (miRNAs) deregulation is common in human cancers, and understanding how it impacts in PCa is of major importance. MiRNAs are mostly downregulat...