A prospective study in the future needs to confirm these possibilities. Conclusion Alvelestat In this study, we found out that the intensity of EYA4 and hTERT mRNA expression increases with the severity of esophageal
pathological changes, which can bring forth values for monitoring the progress of premalignant esophageal lesions. Acknowledgements We would like to express our profound gratitude to Professor Wang Guo Qing of the Cancer Institute & Hospital, Chinese Academy of Medical Science, for providing guidance in the screening of esophageal diseases by using the gastroscope in Feicheng. The project was funded by National Natural Science Foundation of China with contract number No.30571601 and the 2007 innovative post-doctoral project in Shandong Province, China (No. 200702034). References 1. Lo YMD: Quantitative assays for telomerase: PF-01367338 mouse means for studying the end. Clin Chem 1998, 44: 2399–400.PubMed 2. Mo J, Xia Y, Ning Z, Wade TJ, Mumford JL: Elevated human telomerase reverse transcriptase gene expression in blood cells associated with chronic arsenic exposure in Inner Mongolia, China. Environ Health Perspect 2009, 117: 354–60.PubMed 3. Chen X, Jiang H, Yang Y, Liu N: Effect of exopolysaccharide from Bifidobacterium bifidum on cell of gastric cancer and human telomerase reverse transcriptase. Wei Sheng Wu Xue Bao 2009,
49: 117–22.PubMed 4. Tantbirojn P, Triratanachat S, Trivijitsilp P, Niruthisard S: Human telomerase reverse transcriptase (hTERT) expression in borderline ovarian tumors: an immunohistochemical study. J Med Assoc Thai 2009, 92: 308–14.PubMed 5. Kubota M, Yamana H, Sueyoshi S, Fujita H, Shirouzu K: The significance of telomerase activity in cancer lesions and the noncancerous epithelium of the esophagus. Int J Clin Oncol 2002, 7: 32–7.PubMed 6. Hardwick RH, Morgan RJ, Warren BF, Lott M, Alderson D: Brush cytology in the diagnosis of neoplasia in Barrett’s esophagus. Dis Esophagus 1997, 10: 233–7.PubMed 7. de Kok JB, Ruers
TJ, van Muijen GN, van Bokhoven A, Willems HL, Swinkels DW: Real-Time Quantification of Human Telomerase Reverse Transcriptase mRNA in Tumors and Healthy Tissues. Clin Chem. 2000, 46: 313–318.PubMed 8. Borsani G, DeGrandi A, Ballabio A, Bulfone A, Bernard L, Banfi S, Gattuso C, Mariani M, Dixon M, Donnai Cyclooxygenase (COX) D, Metcalfe K, Winter R, Robertson M, Axton R, Brown A, van Heyningen V, Hanson I: EYA4, a novel vertebrate gene related to Drosophila eyes absent. Hum Mol Genet 1999, 8: 11–23.CrossRefPubMed 9. Xu PX, Adams J, Peters H, Brown MC, Heaney S, Maas R: Eya1-deficient mice lack ears and kidneys and show abnormal apoptosis of organ primordia. Nat Genet 1999, 23: 113–17.CrossRefPubMed 10. Xu PX, Woo I, Her H, Beier DR, Maas RL: Mouse Eya homologues of the Drosophila eyes absent gene require Pax6 for expression in lens and nasal placode. Development 1997, 124: 219–31.PubMed 11.