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Background and Objectives: Squamous cell carcinomas (SCC) of the uterine cervix arise from the carcinoma in situ developed in a field of atypical squamous cell proliferation. So, clinical significance of the cervical intraepithelial neoplasm (CIN) are widely accepted. The purpose of this study is to investigate the oncoprotein changes in the sequence of low-grade squamous intraepithelial lesion (LSIL), high-grade squamous intraepithelial lesion (HSIL), keratinizing type of squamous cell carcinoma (K-SCC) and nonkeratinizing type of squamous cell carcinoma (NK-SCC). Materials and Methods: Immunohistochemical stains for anti-bcl-2 oncoprotein to 120 conized cervical tiussues or resected uterus specimens diagnosed as squamous cell lseions including 30 cases of LSIL, 30 cases of HSIL, 30 cases of K-SCC, and 30 cases of NK-SCC were done. The evaluation of the bcl-2 immunostaining was based on the percentages of the positive neoplastic cells. And statistical analysis of data for the relation between each lesion was performed using the Student t-test. Results: The average positive cell rate was 2.0%, 4.44%, 6.25% and 13.57% in LSIL, HSIL, K-SCC, and NK-SCC, respectively. Statistically, immunoreactive positive cell rate of NK-SCC was significantly higher than those of LSIL (p=0.007) and HSIL (p=0.031). But, there was no significant difference of immunoreactive cell rate between K-SCC and HSIL. Conclusion: These results suggested that bcl-2 may play a role in a cervical tumorigenesis and prognostic relationship with NK-SCC.
Background and Objectives: Correlation of cyclin E, bcl-2, p27, VEGF, p53 and E-cadherin expression was analyzed in cervical intraepithelial neoplasia (CIN), carcinoma in situ (CIS), and microinvasive and invasive squamous cell carcinoma (SCC) according to human papilloma virus (HPV) inffection. Materials and Methods : (23 CIN 1, 28 CIN 2, 23 CIN 3), 18 CIS, and 24 SCC. Results: Expression of cyclin E was significantly higher in CIN 2, CIN 3, CIS and SCC than CIN 1 with or without HPV infection. Expression of bcl-2 was significantly higher in CIN 3 than SCC. There was no association between expression of p27 and VEGF and progression of CIN 1 to SCC. Expression of p53 was significantly high in CIN 3, CIS and SCC with or without HPV infection. Expression of the E-cadherin was significantly high in CIN 2, CIN 3, CIS and SCC with or without HPV infection. Conclusion: There was correlation between expression of cyclin E, b치-2, ㅔ53, E-cadherin and progression of CIN to SCC. It is suggested that cyclin E may play an important role in the neoplastic transformation of cervical squamous cell.
Background : Mucins possess the unique function of protecting and lubricating the epithelial surface and other important functions such as call growth, direct implication in the fetal development, the epithelial renewal and differentiation, the epithelial integrity, carcinogenesis, immune regulation, cellular adhesion and metastasis. Purpose : This study was done to provide the significance of alteration of MUC1 and MUC2 expression in colorectal adenocarcinoma, A series of 131 colorectal adenocarcinomas including 11 mucinous carcinomas were screened immunohistochemically for their expression of MUCI and MUC2, Materials and mehtods : Of 131 carcinomas, 76 (58,5%) were MUCI positive and 91 (68, 9%) were MUC2 positive, In normal colonic goblet cells, MUCl was not expressed but MUC2 was expressed in cytoplasm, Conclusion There were up-regulation of MUCI and down-regulation of MUC2 in colorectal carcinomas, The frequency of MUC2 positivity according to differentiation was statistically reliable. (p=0.0001)