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BGI reports study results on frequent mutation of genes encoding UMPP components in kidney cancer
Date:12/4/2011

nalyzed ten primary tumors with matched morphologically normal renal tissues utilizing the whole exome sequencing approach on BGI's sequencing platform. The mutation prevalence was estimated by screen of ~1,100 genes with somatic mutations or that have been causally implicated in cancers in 88 additional ccRCCs for prevalence screen.

There were 23 significantly mutated genes identified in the 98 ccRCCs, including the five well-known renal cancer genes such as VHL and TP53, and genes involved in chromatin modification such as PBRM1, JARID1C and SETD2. "We have identified 12 genes which were previously unknown to be involved in ccRCC, including two tumor suppressor genes, BAP1 and TSC1. Integration of previous studies and our findings suggest that some of the genes may play important roles in ccRCC genesis," said Guo.

In addition to the attempt to identify all mutated genes associated with ccRCC, researchers also focused on specific genes, pathways and mechanisms that potentially play a key role in ccRCC tumorgenesis and warrant exploration as potential targets for treatments. One of the targets was mutations in VHL gene that were commonly suggested to be involved in ccRCC genesis in many previous genetic studies with reported prevalence ranging between 50% and 80%. Interestingly, researchers have found a much lower prevalence of 27% in this study. VHL promoter hypermethylation was only found in 6% of the tumors relative to their matched normal samples, also suggesting a lower prevalence of epigenetic VHL alternation, according to the researchers.

Although the alteration of VHL gene is widely known for its association with kidney cancer, researchers also revealed the frequent mutation of UMPP linked to ccRCC in this study and have sequenced all 135 genes in UMPP in the prevalence screen. A significantly high mutation frequency of UMPP was found in the 98 carcinoma samples. The pathway analysis suggested that alternation of UMPP could potent
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Contact: Jia Liu
liujia@genomics.cn
BGI Shenzhen
Source:Eurekalert

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