Kevin, Li-Chun Hsieh1, Fei-Ting Hsu1, Chia-Feng Lu1, and Cheng-Yu Chen1
1Translational Imaging Research Center, Taipei Medical University, Taipei, Taiwan
Synopsis
In this TCGA study, we identified several qualitative and quantitative radiomics imaging surrogates in glioblastoma, which can be used to differentiate whether this tumor have dysregulated angiogenesis at the molecular level. These features can also be used to predict disease survival.Purpose
Angiogenesis is
one of the critical molecular events in pathogenesis of Glioblastoma. Radiogenomics,
an emerging field links genotypes with MRI phenotypes. To find the imaging
surrogate of angiogenesis, comprehensive radiogenomic analysis using multiparametric
quantitative MRI phenotypes and large-scale gene-expression profiling in GBM
was presented.
Materials and
Methods
Based on The
Cancer Genome Atlas (TCGA), GBMs with EGFR overexpression were enrolled. Tumors
with and without altered expression of target angiogenesis genes were further categorized.
Qualitative and quantitative radiomics MRI phenotype data in these cases were created for
analysis. Kaplan Meier survival statistics, MRI-angiogenesis module correlation
analyses, and survival prediction with target MRI traits were performed to gain
further insight into the radiogenomic signatures.
Results
Totally 52
patients were included in this study. Significant worse survival (p=0.03), higher
degree of contrast enhancement (p=0.04), higher contrast-necrosis ratio (p=0.04),
larger tumor volume and surface area (p=0.04) were noted in augmented angiogenic group.
Significant correlation of disease survival with different imaging phenotypes
(contrast enhancement, necrosis, multicentricity, tumor margin, subventricular
zone invasion) is also proved. Prediction of disease survival longer than 12 months
from imaging score was also achieved with 76.0 %
accuracy.
Conclusion
Construction of an MR imaging and mRNA radiogenomic
association map has led to identification of MR traits that are associated with
dysregulated angiogenesis in GBM. These imaging biomarkers can also serve as
prognosis factors in our cohort. Our findings also have potential therapeutic
significance since successful molecular inhibition of angiogenesis may improve
therapy and patient survival in GBM.
Acknowledgements
No acknowledgement found.References
No reference found.