| Autor: |
Dubois LG; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Campanati L; Laboratório de Morfogênese Celular, Instituto de Ciências Biomédicas da, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil., Righy C; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., D'Andrea-Meira I; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Spohr TC; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Porto-Carreiro I; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Pereira CM; Programa de Pós-Graduação em Odontologia, Escola de Ciências da Saúde (ECS), Universidade do Grande Rio (UNIGRANRIO) Duque de Caxias, Brazil., Balça-Silva J; Centro de Neurociência e Biologia Celular, Faculdade de Medicina, Universidade de Coimbra Coimbra, Portugal., Kahn SA; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., DosSantos MF; Laboratório de Morfogênese Celular, Instituto de Ciências Biomédicas da, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil., Oliveira Mde A; Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Alagoas, Maceió Alagoas, Brazil., Ximenes-da-Silva A; Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Alagoas, Maceió Alagoas, Brazil., Lopes MC; Centro de Neurociência e Biologia Celular, Faculdade de Medicina, Universidade de Coimbra Coimbra, Portugal., Faveret E; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Gasparetto EL; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil., Moura-Neto V; Instituto Estadual do Cérebro Paulo Niemeyer, Rua do Rezende Rio de Janeiro, Brazil ; Laboratório de Morfogênese Celular, Instituto de Ciências Biomédicas da, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil. |
| Abstrakt: |
Astrocytes, members of the glial family, interact through the exchange of soluble factors or by directly contacting neurons and other brain cells, such as microglia and endothelial cells. Astrocytic projections interact with vessels and act as additional elements of the Blood Brain Barrier (BBB). By mechanisms not fully understood, astrocytes can undergo oncogenic transformation and give rise to gliomas. The tumors take advantage of the BBB to ensure survival and continuous growth. A glioma can develop into a very aggressive tumor, the glioblastoma (GBM), characterized by a highly heterogeneous cell population (including tumor stem cells), extensive proliferation and migration. Nevertheless, gliomas can also give rise to slow growing tumors and in both cases, the afflux of blood, via BBB is crucial. Glioma cells migrate to different regions of the brain guided by the extension of blood vessels, colonizing the healthy adjacent tissue. In the clinical context, GBM can lead to tumor-derived seizures, which represent a challenge to patients and clinicians, since drugs used for its treatment must be able to cross the BBB. Uncontrolled and fast growth also leads to the disruption of the chimeric and fragile vessels in the tumor mass resulting in peritumoral edema. Although hormonal therapy is currently used to control the edema, it is not always efficient. In this review we comment the points cited above, considering the importance of the BBB and the concerns that arise when this barrier is affected. |
