Dihydropyrimidine dehydrogenase, multidrug resistance-associated protein, and thymidylate synthase gene expression levels can predict 5-fluorouracil resistance in human gastrointestinal cancer cells.

Author(s):  
Y Kirihara ◽  
W Yamamoto ◽  
T Toge ◽  
M Nishiyama
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pp. 720-727 ◽  
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Yvonne Wettergren ◽  
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Göran Carlsson ◽  
Bengt Gustavsson

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Vol 23 (3) ◽  
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Stephan Hardivillé ◽  
Christophe Mariller ◽  
E. Elass ◽  
Jean-Paul Perraudin ◽  
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2016 ◽  
Vol 4 (4) ◽  
pp. 440-447 ◽  
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Sara Fattah ◽  
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SeyedAtaollah Sadat Shandiz ◽  
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pp. 158-160 ◽  
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Ş. Çetinkalp ◽  
M. Karadeniz ◽  
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Z. Eroğlu ◽  
A. Zengi ◽  
...  

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 854
Author(s):  
Yishu Wang ◽  
Lingyun Xu ◽  
Dongmei Ai

DNA methylation is an important regulator of gene expression that can influence tumor heterogeneity and shows weak and varying expression levels among different genes. Gastric cancer (GC) is a highly heterogeneous cancer of the digestive system with a high mortality rate worldwide. The heterogeneous subtypes of GC lead to different prognoses. In this study, we explored the relationships between DNA methylation and gene expression levels by introducing a sparse low-rank regression model based on a GC dataset with 375 tumor samples and 32 normal samples from The Cancer Genome Atlas database. Differences in the DNA methylation levels and sites were found to be associated with differences in the expressed genes related to GC development. Overall, 29 methylation-driven genes were found to be related to the GC subtypes, and in the prognostic model, we explored five prognoses related to the methylation sites. Finally, based on a low-rank matrix, seven subgroups were identified with different methylation statuses. These specific classifications based on DNA methylation levels may help to account for heterogeneity and aid in personalized treatments.


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