胃癌相关基因GCRG213正反义真核表达载体的构建及鉴定

Effect of sense or anti-sense GCRG213 fragment and GCRG213 RNA interference on transplanted gastric carcinoma in vivo

AIM: To investigate the influence of sense or anti-sense GCRG213 fragment and GCRG213 RNA interference (RNAi) on transplanted gastric cancer in vivo.

METHODS: Gastric carcinoma cell line MKN45 at logarithmic growth phase was subcutaneously inoculated in 20 athymic mice. After tumor formation, the adeno-associated virus (AAV) containing sense or anti-sense GCRG213 fragment and GCRG213 RNA interference fragment was injected into tubercles. Meanwhile, empty and normal saline control groups were designed. All the mice were killed 2 weeks after injection. Tumors were weighted and the expression of GCRG213 mRNA was detected by semi-quantitative reverse transcription-polymerase chain reaction.

RESULTS: Three weeks after inoculation of MKN45 cells, small tumor tubercles came into formation. The weights of tumor tissues were 5.12 ± 1.02, 1.22 ± 0.46, 0.81 ± 0.37, 3.13 ± 0.69 and 3.45 ± 0.87 g in sense, anti-sense, RNAi, empty and normal saline group, and the mRNA expression of GCRG213 were 0.406 ± 0.013, 0.211 ± 0.021, 0.087 ± 0.015, 0.312 ± 0.050 and 0.283 ± 0.061 in the above groups, respectively.

CONCLUSION: Target genes including sense or anti-sense GCRG213 and RNAi fragment can be effectively expressed in vivo through AAV vector. Increased or decreased GCRG213 expression can promote or inhibit growth of gastric cancer.