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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Death+Dis 2017 ; 8 (2): e2634- Nephropedia Template TP
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NGS-based transcriptome profiling reveals biomarkers for companion diagnostics of the TGF-? receptor blocker galunisertib in HCC #MMPMID28230858
Cao Y; Agarwal R; Dituri F; Lupo L; Trerotoli P; Mancarella S; Winter P; Giannelli G
Cell Death Dis 2017[Feb]; 8 (2): e2634- PMID28230858show ga
Transforming growth factor-beta (TGF-?) signaling has gained extensive interest in hepatocellular carcinoma (HCC). The small molecule kinase inhibitor galunisertib, targeting the TGF-? receptor I (TGF-?RI), blocks HCC progression in preclinical models and shows promising effects in ongoing clinical trials. As the drug is not similarly effective in all patients, this study was aimed at identifying new companion diagnostics biomarkers for patient stratification. Next-generation sequencing-based massive analysis of cDNA ends was used to investigate the transcriptome of an invasive HCC cell line responses to TGF-?1 and galunisertib. These identified mRNA were validated in 78 frozen HCC samples and in 26 ex-vivo HCC tissues treated in culture with galunisertib. Respective protein levels in patients blood were measured by enzyme-linked immunosorbent assay. SKIL, PMEPA1 ANGPTL4, SNAI1, Il11 and c4orf26 were strongly upregulated by TGF-?1 and downregulated by galunisertib in different HCC cell lines. In the 78 HCC samples, only SKIL and PMEPA1 (P<0.001) were correlated with endogenous TGF-?1. In ex-vivo samples, SKIL and PMEPA1 were strongly downregulated (P<0.001), and correlated (P<0.001) with endogenous TGF-?1. SKIL and PMEPA1 mRNA expression in tumor tissues was significantly increased compared with controls and not correlated with protein levels in the blood of paired HCC patients. SKIL and PMEPA1 mRNA levels were positively correlated with TGF-?1 mRNA concentrations in HCC tissues and strongly downregulated by galunisertib. The target genes identified here may serve as biomarkers for the stratification of HCC patients undergoing treatment with galunisertib.