<![CDATA[Tuberous sclerosis complex (TSC) is a hamartomatous disease with defects in tuberin (TSC2) that can be autosomaldominant inheritance or spontaneous mutation. Mutation of the TSC-2 gene encoding tuberin on chromosome 16p13.3increases to the clinical disorder of tuberous sclerosis characterized by the development of hamartomas. In the presentstudy, the antitumor activity of pcDNA3.1-TSC2 sense in an oral tongue cancer Supri’s clone-1 (SP-C1) wasinvestigated. An expression vector containing sense-oriented rat TSC-2 pcDNA with pcDNA3.1 and transfected to cell(SP-C1) to regulate the expression of TSC-2 gene in each transfectant was constructed. MTT assay was performed toexamine the SP-C1 cell growth suppression transfected by pcDNA3.1-TSC2. Caspase-3 and -9 were conducted toobserve the induction of cell apoptosis. Western blotting analysis was carried out to determine the protein level of TSC-2,p27Kip1 and ï¡-tubulin. The results showed that, overexpression of TSC-2 exerted the growth inhibitory effect of SP-C1cell and markedly increased apoptosis via caspase-3 and -9 pathways (P=0.001). Sense-oriented SP-C1-cDNA3.1-TSC-2cancer cells have a high expression of p27Kip1. In conclusion, pcDNA3.1-TSC-2 sense increased the antitumor activity oforal tongue cancer SP-C1 cell through p27Kip1 induction.]]>
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