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  • American Association for Cancer Research (AACR)  (2)
  • Li, Ruei-Nian  (2)
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  • American Association for Cancer Research (AACR)  (2)
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  • 1
    Online Resource
    Online Resource
    American Association for Cancer Research (AACR) ; 2013
    In:  Cancer Research Vol. 73, No. 3_Supplement ( 2013-02-01), p. C5-C5
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 73, No. 3_Supplement ( 2013-02-01), p. C5-C5
    Abstract: Esophageal squamous cell carcinoma (ESCC) is the sixth leading cause of cancer death among men in Taiwan, and the five-year survival rate is below 10%. The retinoic acid receptor beta2 (RAR-beta2) is frequently deleted or silenced at early stages in tumor progression. Most of RAR-beta2 repressions was associated with promoter hypermethylation in several epithelial carcinomas. The aim of this study is to investigate RAR-beta2 promoter methylation status in different stages of ESCC patients. Through methylation-specific PCR analysis, methylation rate of RAR-beta2 was 21.1% (15/71) in tumor cases, but unmethylated in all normal counterparts. In RAR-beta2 promoter hypermethylation cases, the methylation frequency of lymph nodes invasion and tumor metastasis was twofold increased. Moreover, RAR-beta2 promoter methylation frequency was increased with 14.7% and showed significant decrease survival rate in advanced stage. Esophageal cancer cell lines 81T, 81T 1-1 and 81T 1-4 were treated with 5-aza-dC (DNA methylation inhibitor), the level of RAR-beta2 methylation was decreased in all ESCC cell lines. Moreover, migration ability was inhibited in 81T cell line. The migration ability of 81T 1-1 and 81T 1-4 cell lines were decreased about 50%. Our findings indicate that RAR-beta2 hypermethylation in ESCC could be useful for prognosis marker. RAR-beta2 methylation may become one of the clinical therapy targets and invasion-migration markers. Citation Format: Ruei-Siang Wu, Chun-Chieh Yu, Yue-Yuah Li, Ming-Tsang Wu, Ruei-Nian Li. Study of the relationship between RAR-beta2 hypermethylation and invasive esophageal squamous cell carcinoma. [abstract]. In: Proceedings of the AACR Special Conference on Tumor Invasion and Metastasis; Jan 20-23, 2013; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2013;73(3 Suppl):Abstract nr C5.
    Type of Medium: Online Resource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2013
    detail.hit.zdb_id: 2036785-5
    detail.hit.zdb_id: 1432-1
    detail.hit.zdb_id: 410466-3
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  • 2
    Online Resource
    Online Resource
    American Association for Cancer Research (AACR) ; 2005
    In:  Cancer Epidemiology, Biomarkers & Prevention Vol. 14, No. 11 ( 2005-11-01), p. 2544-2549
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 14, No. 11 ( 2005-11-01), p. 2544-2549
    Abstract: Human papillomavirus (HPV) infection is a high-risk factor for cervical intraepithelial neoplasm (CIN) but the association between the quantitative HPV DNA load and the severity of CIN remains controversial. We conducted a community study to investigate the correlation between the two. Potential study subjects were selected through Pap smear screening in Kaohsiung County, Taiwan. Ninety-one subjects with either their first case of inflammation or ≥CIN1 by biopsy confirmation were assigned to a case group; 175 normal subjects with negative findings by Pap smears or biopsies were assigned to a control group. Cervical HPV load was detected with Hybrid Capture II assay for high-risk HPV infection, with nested PCR for high- and low-risk HPV infection, and with type-specific PCR for HPV type 16 (HPV-16). Individuals with positive high-risk HPV infection had an increased risk of developing CIN. Compared with HPV-negative subjects, the odds ratios were 32.2 [95% confidence interval (95% CI), 10.4-99.5] for subjects with CIN1, 37.2 (95% CI, 7.4-187.6) for subjects with CIN2, and 68.3 (95% CI, 14.1-328.5) for subjects with ≥CIN3 after adjusting for other confounding factors. The similar trend was also found among the HPV-16–negative individuals. In addition, high-risk HPV DNA load levels were highly correlated with the different grades of CINs in the overall population (Spearman's correlation coefficient r = 0.67, P & lt; 0.0001, n = 266) and the HPV-16–negative population (Spearman's correlation coefficient r = 0.58, P & lt; 0.0001, n = 234). We concluded that high-risk HPV infection, irrespective of HPV-16 infection, was highly and positively associated with the development of CIN.
    Type of Medium: Online Resource
    ISSN: 1055-9965 , 1538-7755
    Language: English
    Publisher: American Association for Cancer Research (AACR)
    Publication Date: 2005
    detail.hit.zdb_id: 2036781-8
    detail.hit.zdb_id: 1153420-5
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