title: Effects of small interfering RNA interference of connexin 37 on subcutaneous gastric tumours in mice.
abstract: The present study aimed to investigate the effects of small interfering (si)RNA interference of connexin 37 (Cx37) on subcutaneous gastric tumours in mice. Constructed lentiviruses carrying siRNA against Cx37 significantly knocked down Cx37 mRNA and protein expression in vitro. A total of 60 mice with gastric cancer were randomly divided into the Cx37 siRNA group, the mock‑siRNA group and the control group. Cx37 siRNA, mock‑siRNA and saline were separately injected (with the lentiviruses transfected into the gastric cancer cells). Following six weeks, the Cx37 mRNA expression, Cx37 protein expression and tumor apoptosis were detected using semiquantitative reverse transcription‑polymerase chain reaction, western blot analysis and terminal deoxynucleotidyl transferase‑mediated dUTP nick end labelling, respectively. Six weeks following lentiviral transfection, the Cx37 mRNA levels in the Cx37 siRNA group, mock‑siRNA group and saline group decreased to 42, 63 and 67%, respectively (P<0.05). The mock‑siRNA group demonstrated no significant change in Cx37 levels compared with the control group. Western blot analysis revealed lower Cx37 protein levels in the Cx37‑RNAi group than in the other groups (0.21±0.07 vs. 0.65±0.06 vs. 0.54±0.07), and that the apoptotic index of the Cx37‑RNAi group was higher than those of the mock‑siRNA and control groups (19.7±5.1 vs. 9.8±6.4 vs. 10.5±7.2%, 11.1±6.9; P<0.05). In conclusion, it was demonstrated that Cx37 siRNA is correlated with gastric cancer. Interference of Cx37 effectively reduces Cx37 mRNA and protein expression and promotes tumour apoptosis.
authors.affiliation: Department of Gastrointestinal Surgery, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China.
authors.forename: Yuanming
authors.initials: Y
authors.lastname: Jing
authors.affiliation: Department of Cardiology, The Affiliated People's Hospital of Nanjing Medical University in Wuxi and People's Hospital of Wuxi City, Wuxi, Jiangsu 214023, P.R. China.
authors.forename: Suxia
authors.initials: S
authors.lastname: Guo
authors.affiliation: Department of Gastrointestinal Surgery, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Gastrointestinal Surgery, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China.
authors.forename: Aijing
authors.initials: A
authors.lastname: Sun
authors.affiliation: Department of Gastrointestinal Surgery, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China.
authors.forename: Feng
authors.initials: F
authors.lastname: Tao
authors.affiliation: Department of Colorectal Surgery, Zhejiang Provincial Tumor Hospital, Hangzhou, Zhejiang 310022, P.R. China.
authors.forename: Haixing
authors.initials: H
authors.lastname: Ju
authors.affiliation: Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China.
authors.forename: Haixin
authors.initials: H
authors.lastname: Qian
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000502:physiology; D002460:Cell Line; D045744:Cell Line, Tumor; D017630:Connexins / Q000235:genetics*; D015536:Down-Regulation / Q000235:genetics; D005260:Female; D057809:HEK293 Cells; D006801:Humans; D016086:Lentivirus / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D034622:RNA Interference / Q000502:physiology; D012333:RNA, Messenger / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics*; D013274:Stomach Neoplasms / Q000235:genetics*; D014162:Transfection / Q000379:methods; D000097006:Gap Junction alpha-4 Protein
chemical_list: D017630:Connexins; D012333:RNA, Messenger; D034741:RNA, Small Interfering; D000097006:Gap Junction alpha-4 Protein