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Research Paper|Volume 13, Issue 3|pp 3645—3660

Enrichment of branched chain amino acid transaminase 1 correlates with multiple biological processes and contributes to poor survival of IDH1 wild-type gliomas

Li Yi1,2,3, Xiaoguang Fan1,2, Jiabo Li1,2, Feng Yuan1,2, Jian Zhao3, Monica Nistér3, Xuejun Yang1,2
  • 1Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China
  • 2Tianjin Neurological Institute, Tianjin 300052, China
  • 3Department of Oncology-Pathology, Karolinska Institutet, Karolinska University Hospital Solna, Solna 17164, Sweden
* Equal contribution
Received: May 7, 2020Accepted: November 6, 2020Published: January 20, 2021
https://doi.org/10.18632/aging.202328

Copyright: © 2020 Yi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Previous studies have reported the association between branched-chain amino acid trasaminase1 (BCAT1) and IDH1 wild-type gliomas. Nonetheless, as a promising target for treatment of primary glioblastoma, comprehensive reports on BCAT1 in gliomas are still lacking. In the present study, we accessed glioma patient cohorts and tissue microarray to evaluate the expression pattern of BCAT1 for determining its prognostic value and its relationship with IDH1 mutation status. Furthermore, we explored the potential regulatory mechanism of BCAT1 in gliomas by comparing the BCAT1 mRNA expression pattern with selected tumor biological signatures. The results showed that BCAT1 is highly expressed in GBM versus lower grade gliomas and could represent the poor survival of IDH1 wild-type gliomas. Moreover, BCAT1 is an independent prognostic factor for glioma patients, high BCAT1 expression is related to unfavorable clinical parameters including older age, IDH wildtype, no 1p/19q codeletion, ATRX wildtype and MGMT unmethylated. Additionally, BCAT1 correlated with apoptosis, hypoxia and angiogenesis processes in gliomas and high expression of BCAT1 revealed higher glycolysis level and increased immunosuppressive status in tumor progression. We concluded that BCAT1 is a strong prognostic factor for glioma patients and involved in the malignant progression of IDH1 wild-type gliomas.