Affiliation:
1. Universidade de Sao Paulo
2. Universitair Medisch Centrum Groningen
Abstract
Abstract
Vesicle-associated membrane protein-associated protein B/C (VAPB) has been widely studied in neurodegenerative diseases such as ALS, but little is known about its role in cancer. Medulloblastoma is a common brain malignancy in children and arises from undifferentiated cells during neuronal development. Therefore, medulloblastoma is an interesting model to investigate the possible relationship between VAPB and tumorigenesis. Here we demonstrate that high VAPB expression in medulloblastoma correlates with decreased overall patient survival. Consistent with this clinical correlation, we find that VAPB is required for normal proliferation rates of medulloblastoma cells in vitro and in vivo. Knockout of VAPB impaired cell cycle progression and arrested cells in G0/G1 partially due to a functional interaction with the Ephrin Receptor A4 (EPHA4). Furthermore, transcript levels of WNT-related proteins were decreased in the VAPBKO. We conclude that VAPB is required for proliferation of medulloblastoma cells, thus revealing VAPB as a potential therapeutic target for medulloblastoma treatment.
Publisher
Research Square Platform LLC