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- W2024602110 abstract "<i>Background:</i> Loss of heterozygosity (LOH) at 13q22 is a common event in nasopharyngeal carcinoma (NPC). <i>EDNRB</i> gene located at 13q22 has been demonstrated to be hypermethylated in some kinds of tumors. In the current study, we focused on the epigenetic and genetic alterations of <i>EDNRB</i> in NPC. <i>Methods:</i> The mRNA expression of <i>EDNRB</i> was detected by semiquantitative RT-PCR and real-time quantitative PCR in 49 NPC and 12 chronic nasopharyngitis biopsies. The methylation and LOH status of <i>EDNRB</i> were examined by methylation-specific polymerase chain reaction, microsatellite PCR and sequencing. We also examined the mRNA expression of <i>EDNRB</i> in four NPC cell lines after 5-aza-2′-deoxycytidine treatment. <i>Results:</i><i>EDNRB</i> was downregulated in primary NPC tissues and NPC cell lines, and a relatively higher methylation level of <i>EDNRB</i> was found in NPC biopsies (84%) compared to that in chronic nasopharyngitis biopsies (42%). Treatment of NPC cell lines with 5-aza-2′-deoxycytidine activated <i>EDNRB</i> expression. LOH of <i>EDNRB </i>gene was also found at two microsatellite sites with ratios of 6.25 and 16.67% in NPC. <i>Conclusion: </i>Our results suggested that <i>EDNRB</i> expression may be affected by aberrant promoter methylation and gene deletion and may play a role in the development of NPC." @default.
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- W2024602110 date "2007-01-01" @default.
- W2024602110 modified "2023-09-27" @default.
- W2024602110 title "Epigenetic and Genetic Alterations of the <i>EDNRB</i> Gene in Nasopharyngeal Carcinoma" @default.
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- W2024602110 doi "https://doi.org/10.1159/000113146" @default.
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