RESUMO
Despite the great interest in RNA therapeutics, the development of a successful gene delivery process is still a major challenge. We propose an efficient nucleic acid entrapment into the mesopores of biocompatible nanoscaled metal-organic frameworks. Their rapid cellular uptake together with RNA protection and release led to a relevant in vitro gene activity.
Assuntos
Portadores de Fármacos , Técnicas de Transferência de Genes , Ferro , Estruturas Metalorgânicas , RNA , Linhagem Celular Tumoral , Portadores de Fármacos/química , Portadores de Fármacos/farmacocinética , Portadores de Fármacos/farmacologia , Humanos , Ferro/química , Ferro/farmacocinética , Ferro/farmacologia , Estruturas Metalorgânicas/química , Estruturas Metalorgânicas/farmacocinética , Estruturas Metalorgânicas/farmacologia , RNA/química , RNA/farmacocinética , RNA/farmacologiaRESUMO
Tumor growth and metastasis entangle the alteration and recruitment of non-malignant cells to the primary tumor, among them immune cells, constituting the tumor microenvironment (TME). Communication between tumor cells and their stroma has been shown as a fundamental driving force of the tumoral process. A great deal of effort has been focused on depicting their specific interactions and crosstalk. However, most research has been carried out in 2D conventional cultures that alter cell morphology and intracellular signaling processes. Considering these premises, we have developed a 3D cell co-culture model to mimic T cell infiltration into the tumor mass and explore tumor-immune cells interactions in the TME. Expression of specific cell markers and assessment of cell proliferation were carried out to characterize the proposed 3D co-culture model. Additionally, the study and profiling of the secretome revealed a subset of particular cancer-related inflammation proteins prompted upon 3D cultivation of tumor cells in presence of lymphocytes, pointing out an intercellular communication. Altogether, these results suggest that our 3D cell co-culture model can be a useful tool to identify and study critical factors mediating the crosstalk between tumor and immune cells in the TME. Finally, the potential of this model as a drug-screening platform has been explored using docetaxel as a model antitumoral compound.
Assuntos
Técnicas de Cocultura/métodos , Neoplasias/imunologia , Linfócitos T/imunologia , Comunicação Celular , Linhagem Celular Tumoral , Proliferação de Células , Humanos , Modelos Biológicos , Neoplasias/genética , Neoplasias/fisiopatologia , Proteínas/genética , Proteínas/imunologia , Microambiente TumoralRESUMO
Tumor invasion is paradigmatic of the complex interactions connecting a carcinoma with its environment, and a reflex of the cellular and molecular heterogeneity that defines the initiation of dissemination and metastasis. The hostile situation generated by a growing carcinoma and a reactive stroma is at the basis of the promotion of carcinoma invasion and metastasis, with oxidative stress emerging as a main player in the acquisition of an aggressive tumor phenotype. In this review, we present this complex scenario with a focus on the contribution of the reactive environment and the oxidative stress to the cellular and molecular events associated with carcinoma invasion and metastasis. We also discuss the potential of oxidative stress as a source of biomarkers of advance disease, and as supplier of a therapeutic armamentarium against the initial steps of metastatic dissemination.