NDLI: Development of a DUSP9 Methylation Screening Assay

Content Provider	Springer Nature Link
Author	Jenner, Stefan Wiedorn, Klaus Herrmann Techel, Dieter
Copyright Year	2014
Abstract	A methylation screening assay for DUSP9 (dual-specificity phosphatase 9) has been developed and applied on 79 FFPE samples from patients with colorectal cancer (CRC) and 22 corresponding tumor free colon samples in this study. Quantitative pyrosequencing was used for the determination of the methylation in the promoter CpG island, including 83 CpG motifs. In this way, the methylation pattern of the 11 tumor samples with the weakest and the strongest methylation could be identified and were compared to their corresponding tumor free colon samples. Forty six percent of the weakly methylated samples showed no significant difference to their tumor free counterparts, whereas in 27 % of the cases an increased or reduced methylation was detectable. For the strongly methylated tumor samples only 18 % showed no significant difference to their tumor free counterparts, whereas 82 % were significantly stronger methylated. In CRC, the aberrant promoter methylation of tumor suppressor genes is one aspect that defines the CpG island methylator phenoptype (CIMP) and is frequently observed in a subpopulation of cases. Patients harboring a CIMP phenotype often show additional clinicopathological characteristics, the so called CIMP features. Interestingly, no CIMP features were found for the weakly methylated samples analyzed in this study but could be seen in 82 % of the strongly methylated cases, indicating a possible use for DUSP9 as CIMP marker.
Starting Page	123
Ending Page	130
Page Count	8
File Format	PDF
ISSN	12194956
Journal	Pathology & Oncology Research
Volume Number	21
Issue Number	1
e-ISSN	15322807
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-05-18
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	DUSP9 Colorectal cancer Promoter methylation CIMP Pyrosequencing Cancer Research Oncology Pathology Immunology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Cancer Research Pathology and Forensic Medicine Oncology

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