title: Inhibition of gastric cancer cell proliferation by antisense oligonucleotides targeting the messenger RNA encoding proliferating cell nuclear antigen.
abstract: Proliferating cell nuclear antigen (PCNA) is a nuclear protein that regulates DNA synthesis by DNA polymerase delta, and is essential for DNA replication. PCNA expression level is related to the malignancy of gastric cancer cells. Seven different gastric cancer cell lines and two kinds of control cell lines were treated with antisense oligonucleotides complementary to the messenger RNA of PCNA. Treatment of each gastric cancer cell line with antisense oligonucleotides at concentration of 10-40 microM inhibited the cell growth, colony formation and PCNA protein production in a dose-dependent manner, but only affected normal cells slightly. A random sequence oligomer showed no effect. These results show that PCNA is essential for gastric cancer cell proliferation and that the use of synthetic oligonucleotides is an effective way of producing antisense-mediated changes in the behaviour of human gastric cancers.
authors.affiliation: First Department of Surgery, Kyoto Prefectural University of Medicine, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Sakakura
authors.forename: A
authors.initials: A
authors.lastname: Hagiwara
authors.forename: H
authors.initials: H
authors.lastname: Tsujimoto
authors.forename: K
authors.initials: K
authors.lastname: Ozaki
authors.forename: T
authors.initials: T
authors.lastname: Sakakibara
authors.forename: T
authors.initials: T
authors.lastname: Oyama
authors.forename: M
authors.initials: M
authors.lastname: Ogaki
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
mesh_terms: D001483:Base Sequence; D002448:Cell Adhesion; D002455:Cell Division / Q000187:drug effects; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D066298:In Vitro Techniques; D008969:Molecular Sequence Data; D016376:Oligonucleotides, Antisense / Q000494:pharmacology*; D018809:Proliferating Cell Nuclear Antigen / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics; D013274:Stomach Neoplasms / Q000473:pathology*; D014407:Tumor Cells, Cultured
chemical_list: D016376:Oligonucleotides, Antisense; D018809:Proliferating Cell Nuclear Antigen; D012333:RNA, Messenger