title: Effect of p53β on human gastric cancer cells treated with recombinant mutated human TNF and cisplatin.
abstract: The present study aimed to investigate the role of tumour protein 53 isoform b (p53β) on human gastric cancer (GC) cell lines treated with recombinant mutated human tumour necrosis factor (rmhTNF) and cisplatin. The Cell Counting Kit‑8 assay was used to assess growth in the GC cell lines MKN45 and SGC7901, following treatment with rmhTNF in the presence or absence of cisplatin. Levels of p53β and bcl‑2 apoptosis regulator (bcl‑2) mRNA were assessed using reverse transcription‑polymerase chain reaction. The results demonstrated that growth was significantly inhibited by either cisplatin or rmhTNF treatments alone in MKN45 cells, and combination treatment with cisplatin and rmhTNF had a synergistic effect on growth inhibition of MKN45 cells. Notably, these observations were not evident in SGC7901 cells, where a mutant form of p53 is present. Treatment of MKN45 cells with rmhTNF did not affect bcl‑2 or p53β mRNA expression levels. However, treatment of MKN45 cells with cisplatin induced upregulation of p53β and downregulation of bcl-2 mRNA expression levels, and these effects were enhanced by combination treatment with rmhTNF. Pearson correlation analysis revealed a negative correlation between the expression of p53β and bcl‑2 mRNA, and a negative correlation between bcl-2 mRNA expression and the inhibition of cell growth. In conclusion, the inhibitory effect of cisplatin on the growth of MKN45 GC cells was enhanced by rmhTNF via unknown mechanisms that involved p53β, indicating that p53β may be an appropriate therapeutic target for the treatment of GC.
authors.affiliation: Department of Gastroenterology, The Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Wansheng
authors.initials: W
authors.lastname: Ji
authors.affiliation: Department of Gastroenterology, Graduate School of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Mingliang
authors.initials: M
authors.lastname: Yuan
authors.affiliation: Department of Gastroenterology, The Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, The Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, The Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Jianxin
authors.initials: J
authors.lastname: Jiao
authors.affiliation: Department of Gastroenterology, The Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China.
authors.forename: Zhixing
authors.initials: Z
authors.lastname: Gao
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002945:Cisplatin / Q000494:pharmacology*; D015870:Gene Expression; D006801:Humans; D050505:Mutant Proteins; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics; D011994:Recombinant Proteins / Q000235:genetics / Q000494:pharmacology*; D013274:Stomach Neoplasms / Q000235:genetics / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000494:pharmacology*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000378:metabolism
chemical_list: D000970:Antineoplastic Agents; C000595707:BCL2 protein, human; D050505:Mutant Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D012333:RNA, Messenger; D011994:Recombinant Proteins; C439524:TNF protein, human; D014409:Tumor Necrosis Factor-alpha; D016159:Tumor Suppressor Protein p53; D002945:Cisplatin