Abstract
To investigate the effect of inhibition of telomerase with human telomerase reverse transcriptase (hTERT) antisense on tumor necrosis factor-alpha (TNF-alpha)-induced apoptosis in prostate cancer cells (PC3). Antisense phosphorothioate oligodeoxynucleotide (AS PS-ODN) was synthesized and purified. Telomerase activity was measured using the telomeric repeat amplification protocol (TRAP) and polymerase chain reaction enzyme-linked immunoassay (PCR-ELISA). hTERT mRNA was measured by reverse transcription PCR (RT-PCR) assay and gel-image system. hTERT protein was detected by immunochemistry and flow cytometry. Cell viability was detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium (MTT) assay. Cell apoptosis was observed by morphological method and determined by flow cytometry. The telomerase activity decreased with time after hTERT AS PS-ODN treatment. The levels of hTERT mRNA decreased with time after hTERT AS PS-ODN treatment, which appeared before the decline of the telomerase activity. The percentage of positive cells of hTERT protein declined with time after hTERT AS PS-ODN treatment, which appeared after the decline of hTERT mRNA. There was no difference in telomerase activity, hTERT mRNA and protein levels between hTERT sense phosphorothioate oligodeoxynucleotide (S PS-ODN) and the control group. The cell viability decreased with time after hTERT AS PS-ODN combined with TNF-alphatreatment. The percentage of apoptosis increased with time after hTERT AS PS-ODN combined with TNF-alpha treatment. There was no difference in cell viability and the percentage of apoptosis between hTERT S PS-ODN and the control group. hTERT AS PS-ODN can significantly inhibit telomerase activity by downregulating the hTERT mRNA and protein expression, and inhibition of telomerase with hTERT antisense can enhance TNF-alpha-induced apoptosis of PC3 cells.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
