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Published in: Langenbeck's Archives of Surgery 4/2009

01-07-2009 | Original Article

Lack of death receptor 4 (DR4) expression through gene promoter methylation in gastric carcinoma

Authors: Kyung Hwa Lee, Sang Woo Lim, Ho Gun Kim, Dong Yi Kim, Seong Yeob Ryu, Jae Kyun Joo, Jung Chul Kim, Jae Hyuk Lee

Published in: Langenbeck's Archives of Surgery | Issue 4/2009

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Abstract

Background and aims

To determine the underlying mechanism for the differential expression, the extent of promoter methylation in tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-related genes acting downstream of TRAIL was examined in early and advanced gastric carcinomas.

Methods

The extent of promoter methylation in the DR4, DR5, DcR1, DcR2, and CASP8 genes was quantified using bisulfite modification and methylation-specific polymerase chain reaction.

Results

The promoters for DcR1, DcR2, and CASP8 were largely unmethylated in early gastric carcinoma, advanced gastric carcinoma, and controls, with no significant difference among them. Protein levels of DR4, DcR1, and DcR2 as revealed by immunohistochemistry correlated with the extent of the respective promoter methylation (P < 0.05 in all cases). Hypomethylation, rather than hypermethylation, of the DR4 promoter was noted in invasive gastric malignancies, with statistical significance (P = 0.003).

Conclusion

The promoter methylation status of TRAIL receptors in gastric carcinoma may have clinical implications for improving therapeutic strategies in patients with gastric carcinoma.
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Metadata
Title
Lack of death receptor 4 (DR4) expression through gene promoter methylation in gastric carcinoma
Authors
Kyung Hwa Lee
Sang Woo Lim
Ho Gun Kim
Dong Yi Kim
Seong Yeob Ryu
Jae Kyun Joo
Jung Chul Kim
Jae Hyuk Lee
Publication date
01-07-2009
Publisher
Springer-Verlag
Published in
Langenbeck's Archives of Surgery / Issue 4/2009
Print ISSN: 1435-2443
Electronic ISSN: 1435-2451
DOI
https://doi.org/10.1007/s00423-009-0484-x

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