title: Decreased expression of KLF6 and its significance in gastric carcinoma.
abstract: To study the expression of the Krüppel-like transcription factor 6 (KLF6) in human gastric carcinoma and normal gastric mucosa tissues, and to explore the role of KLF6 in the carcinogenesis and tumor progression and its clinical significance. Expression of KLF6, P21WAF1 and PCNA was investigated by immunohistochemistry for 69 surgically resected gastric carcinoma tissues and corresponding normal gastric mucosa tissues, respectively. The correlations of KLF6 expression with clinicopathological characteristics, P21WAF1 and PCNA were examined. Positive-expression of KLF6 was 64 out of 69 cases (92.8%) in normal gastric mucosa and only 23 cases (33.3%) in gastric carcinoma. Expression of KLF6 in the gastric carcinoma was remarkably lower than normal gastric mucosa. Decreased expression of KLF6 in gastric carcinoma was significantly associated with histological differentiation (P<0.01), TNM stage (P<0.05), lymph node metastasis (P<0.01) and distant metastasis (P<0.05). There was no significant correlation between KLF6 expression and sex, age. Meanwhile, expression of KLF6 was associated with expression of P21WAF1 in both normal gastric mucosa and gastric carcinoma (P<0.05). In addition, decreased expression of KLF6 in gastric carcinoma was positively associated with PCNA level (r=0.719, P<0.01) by association analysis. Down-regulation of KLF6 might play an important role in the carcinogenesis and development of human gastric carcinoma and have significant clinical value.
authors.affiliation: Department of Internal Medicine, Clinical Medical College of Yangtze University, and Department of Gastroenterology, No. 1 Hospital Affiliated to Yangtze University, 434000, Jingzhou, Hubei Province, China. www95@126.com
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Tan
authors.forename: Yue-sha
authors.initials: YS
authors.lastname: Yuan
authors.forename: Cheng-ming
authors.initials: CM
authors.lastname: Hu
authors.forename: Chang-hua
authors.initials: CH
authors.lastname: He
authors.forename: Wei-zheng
authors.initials: WZ
authors.lastname: Wang
authors.forename: Jun-chuan
authors.initials: JC
authors.lastname: Li
authors.forename: Qiu
authors.initials: Q
authors.lastname: Zhao
authors.forename: Nan-zhi
authors.initials: NZ
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D005260:Female; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000378:metabolism* / Q000473:pathology; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007124:Immunoenzyme Techniques; D000075723:Kruppel-Like Factor 6; D051741:Kruppel-Like Transcription Factors / Q000378:metabolism*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D013274:Stomach Neoplasms / Q000378:metabolism* / Q000473:pathology; D015996:Survival Rate
chemical_list: C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; C105465:KLF6 protein, human; D000075723:Kruppel-Like Factor 6; D051741:Kruppel-Like Transcription Factors; D018809:Proliferating Cell Nuclear Antigen; D011518:Proto-Oncogene Proteins