Rna interference of annexin II gene in PC3 cells by using small interference RNA synthesized with in vitro transcription.
OBJECTIVE
To silence annexin II gene expression by using small interference RNA (siRNA) in prostate cancer cell line PC3.


METHODS
For in vitro transcription, four sequences of 29-nucleotide DNA template oligonucleotides were designed, and one pair of the sequences were complementary to annexin II gene. The other pair was negative control. The 8 nucleotides at the 3' end of each oligonucleotide were complementary to the T7 Promoter Primer. The sense and antisense siRNA templates were transcribed by T7 RNA polymerase and the resulting RNA transcripts were hybridized to create dsRNA. The siRNA was transfected into prostate cancer cell PC3. For assaying the efficiency of siRNA, confocal microscopy, Northern blotting, and Western blotting were employed to examine the expression of annexin II protein and its mRNA. 3H thymidine was used to measure DNA synthesis.


RESULTS
The siRNA sequence specific to annexin II gene was capable of inhibiting the expression of annexin II protein and its mRNA. And cellular DNA synthesis was significantly reduced in siRNA transfected cells.


CONCLUSIONS
The protocol for the synthesis of siRNA by T7 RNA polymerase is feasible. Annexin II might be involved in DNA synthesis.
Yuan
Ya-Wei
YW
Department of Radiotherapy, Nanfang Hospital of Nanfang Medical University, Guangzhou 510515. yuanyawei@fangliao.com
Sun
Ai-Min
AM
Lui
Ying
Y
Chen
Long-Hua
LH
Banerjee
A G
AG
D017306:Annexin A2 / Q000235:genetics*; D045744:Cell Line, Tumor; D004261:DNA Replication; D004273:DNA, Neoplasm / Q000235:genetics; D006801:Humans; D008297:Male; D011401:Promoter Regions, Genetic / Q000235:genetics; D011471:Prostatic Neoplasms / Q000235:genetics; D034622:RNA Interference; D012334:RNA, Neoplasm / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics*; D014158:Transcription, Genetic
D017306:Annexin A2; D004273:DNA, Neoplasm; D012334:RNA, Neoplasm; D034741:RNA, Small Interfering