Expression of TSLC-1 in human papillary thyroid carcinoma and its clinical significance / 实用医学杂志

Objective To explore the relationship between TSLC-1 protein expression and the progression and carcinogenesis of human papillary thyroid carcinogenesis. Methods Expressions of TSLC-1 protein in 20 pieces of benign thyroid lesions and 40 pieces of papillary thyroid carcinoma tissues were examined by immunohistochemistry. Results The expression of TSLC-1 in papillary thyroid carcinoma (9/40) was lower than that in benign thyroid lesions (22.50% versus 90.00%, P < 0.05). Expression of TSLC-1 was significantly associated with lymph node metastasis and TNM in papillary thyroid carcinoma (P < 0.05). Conclusions Expression of TSLC-1 is closely related with carcinogenesis , lymph node metastasis , and clinical stage in papillary thyroid carcinoma.

Cloning and identification of the core promoter of human TSLC1 gene / 基础医学与临床

Objective To clone and to identify the core promoter of human TSLCI used for exploring of transcrip-tion regulatory mechanism.Methods A series of different fragments located in the upstream of translation start site of TSLC1 were amplified from human genomic DNA by PCR,and then constructed into pGL3-Basic luciferase re-porter vector.The activity of different fragments in A549 and NCI-H446 cells was examined by a dual-luciferase as-say after transient transfection,and then the core promoter of TSLC1 was identified.Results Among the different constructs,the fragment of -68 ～ -329 bp located in the upstream of ATG showed the strong activity both in A549 cells and NCI-H446 cells,which played an important role in the transcription of TSLC1.Conclusion The fragment of -68 ～ -329 bp located in the upstream of translation start site of TSLC1 might be the core promoter region.

Effect of TSLC1 Gene on Proliferation, Invasion and Apoptosis of Human Hepatocellular Carcinoma Cell Line HepG2 / 华中科技大学学报（医学）（英德文版）

The recombinant plasmid pCI-TSLC1 carrying TSLC1 gene was stably transfected into human hepatocellular carcinoma cell line HepG2. Cell proliferation was analyzed by MTT assay. The ability of migration was determined by transwell and FACSort flow cytometry was used to detect the cell cycle distribution and apoptosis. Western blotting revealed that H4 expressed higher amounts of TSLC1 protein than H15 and H0 did. The growth of TSLC1-transfected cells was significantly sup- pressed in vitro, and the ability of migration was reduced as well. The re-expression of TSLC1 could induce cell apoptosis. It was concluded that TSLC1 strongly inhibited the growth and ability of mi- gration of HepG2 cell line in vitro and also induced apoptosis, suggesting that TSLC1 could reduce the tumorigenicity of human hepatocellular carcinoma cell line HepG2 in vitro, which provided a ba-sis for further exploring the roles of TSLC1 in hepatocellular cellular carcinoma.