Blockage of [Ca.sup.2+]-permeable AMPA receptors suppresses migration and induces apoptosis in human glioblastoma cells

• Published in: Nature medicine Vol. 8; no. 9; pp. 971 - 978
• Main Authors: Ishiuchi, Shogo, Tsuzuki, Keisuke, Yoshida, Yukari, Yamada, Nobuaki, Hagimura, Norikazu, Okado, Haruo, Miwa, Akiko, Kurihara, Hideyuki, Nakazato, Yoichi, Tamura, Masaru, Sasaki, Tomio, Ozawa, Seiji
• Format: Journal Article
• Language: English
• Published: Nature Publishing Group 01.09.2002
• Subjects: Apoptosis; Glioblastoma multiforme; Glutamate
• ISSN: 1078-8956; 1546-170X
• DOI: 10.1038/nm746

Glioblastoma multiforme is the most undifferentiated type of brain tumor, and its prognosis is extremely poor. Glioblastoma cells exhibit highly migratory and invasive behavior, which makes surgical intervention unsuccessful. Here, we showed that glioblastoma cells express [Ca.sup.2+]-permeable α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA)-type glutamate receptors assembled from the GluR1 and/or GluR4 subunits, and that their conversion to [Ca.sup.2+]-impermeable receptors by adenovirus-mediated transfer of the GluR2 cDNA inhibited cell locomotion and induced apoptosis. In contrast, overexpression of [Ca.sup.2+]-permeable AMPA receptors facilitated migration and proliferation of the tumor cells. These findings indicate that [Ca.sup.2+]-permeable AMPA receptors have crucial roles in growth of glioblastoma. Blockage of these [Ca.sup.2+]-permeable receptors may be a useful therapeutic strategy for the prevention of glioblastoma invasion.