In Vivo imaging reveals extracellular vesicle-mediated phenocopying of metastatic behavior

JOURNAL BIOLOGIA CELULAR E MOLECULAR

 

 In Vivo imaging reveals extracellular vesicle-mediated phenocopying of metastatic behavior. 

Apresentadores: Estela Aparecida Pereira e Flávia Costa Mendonça

Tutor: Dr. Luis Lamberti P. da Silva

Sumary

Most cancer cells release heterogeneous populations of extracellular vesicles (EVs) containing proteins, lipids, and nucleic acids. In vitro experiments showed that EV uptake can lead to transfer of functional mRNA and altered cellular behavior. However, similar in vivo experiments remain challenging because cells that take up EVs cannot be discriminated from non-EV-receiving cells. Here, we used the Cre-LoxP system to directly identify tumor cells that take up EVs in vivo. We show that EVs released by malignant tumor cells are taken up by less malignant tumor cells located within the same and within distant tumors and that these EVs carry mRNAs involved in migration and metastasis. By intravital imaging, we show that the less malignant tumor cells that take up EVs display enhanced migratory behavior and metastatic capacity. We postulate that tumor cells locally and systemically share molecules carried by EVs in vivo and that this affects cellular behavior.

QUINTA FEIRA 22.06.2015 às 16:30 hs

Anfiteatro Pedreira de Freitas – Prédio Central – FMRP

Artigo na íntegra: Aqui.