[Effect of diubiquitin gene silencing by small interfering RNA on proliferation and invasion of tongue carcinoma Tca8113 cells].
OBJECTIVE
To study the effect of diubiquitin (FAT10) down-regulation by small interfering RNA-mediated RNA interference (RNAi) on the biological features of tongue carcinoma cell line Tca8113.


METHODS
Tca8113 cells were transfected with synthetic small interfering RNA (siRNA) targeting FAT10. Expression of FAT10 mRNA and protein were respectively measured by reverse transcription polymerase chain reaction (RT-PCR) and Western blotting, transfection efficiencies were monitored. The distribution of cell cycle phases was determined using flow cytometry. The proliferative and invasive ability of Tca8113 cells in vitro was evaluated by the colony-forming unit assay and Transwell migration assay respectively.


RESULTS
Both FAT10 mRNA and protein expression were significantly decreased in the experimental group (pU-FAT10-siRNA: mRAN 0.36 ± 0.03, Protein 0.39 ± 0.04) compared with controls (


METHODS
mRNA 0.95 ± 0.05, Protein 0.69 ± 0.05; pU-siRNA: mRNA 0.92 ± 0.07, Protein 0.64 ± 0.05) (P < 0.05). The cell cycle was arrested in the G(1) phase [pU-FAT10-siRNA: (72.45 ± 5.81)%,


METHODS
(45.95 ± 3.80)%, pU-siRNA: (45.95 ± 3.80)%]. The proliferation and invasiveness of treated Tca8113 cells were inhibited in vitro (pU-FAT10-siRNA: 41.83 ± 8.19, CONTROL: 317.21 ± 69.48, pU-siRNA: 339.36 ± 73.84).


CONCLUSIONS
Delivery of siRNA targeting FAT10 seems efficient in down-regulating FAT10 expression and diminishing the growth, proliferation and invasiveness of Tca8113 cells, suggesting that siRNA-based strategy targeting FAT10 may lay a foundation for the clinical management of tongue carcinoma.
Department of Stomatology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, China. huangjian1995@yahoo.cn
Jian
J
Huang
De-huai
DH
Li
D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D059447:Cell Cycle Checkpoints; D045744:Cell Line, Tumor; D002465:Cell Movement; D049109:Cell Proliferation; D015536:Down-Regulation; D006801:Humans; D034622:RNA Interference; D012333:RNA, Messenger / Q000378:metabolism; D034741:RNA, Small Interfering / Q000235:genetics; D014062:Tongue Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D014162:Transfection; D014452:Ubiquitins / Q000235:genetics / Q000378:metabolism*
D012333:RNA, Messenger; D034741:RNA, Small Interfering; C109184:UBD protein, human; D014452:Ubiquitins