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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Carcinoma, Hepatocellular, Gene Expression, Genes, Tumor Suppressor, Humans, Liver Neoplasms, Proteins, Recombinant Fusion Proteins, Telomerase, Transfection, Tumor Cells, Cultured, Tumor Suppressor Proteins.
user
Does over-expression of LPTS-L in hepatocellular carcinoma cell line SMMC-7721 induce crisis? Context: To evaluate the function of the longer transcripts LPTS-L in hepatocellular carcinoma cell line SMMC-7721. SMMC-7721 cells were transfected with LPTS-L expression construct and stably transfected cells were selected by G418. Multiple single clones formed and were checked for their phenotype. In the study of the effect on telomerase activity of LPTS-L in vitro, GST-LPTS-L fusion protein was expressed in E.coli and purified by glutathione-agarose column. Telomeric repeat amplification protocol (TRAP) assays were performed to study the influence of telomerase activity in SMMC-7721 cells. Over-expression of LPTS-L induced SMMC-7721 cells into crisis. LPTS-L could inhibit the telomerase activity in SMMC-7721 cells in vitro.
assistant
LPTS-L is a potent telomerase inhibitor. Over-expression of LPTS-L can induce hepatoma cells into crisis due to the reduction of telomerase activity. Final Decision: yes