title: Overexpression of Septin1: possible contribution to the development of oral cancer.
abstract: Our previous study using proteomic profiling demonstrated significant up-regulation of Septin1, a conserved family of GTPase proteins, in oral squamous-cell carcinoma (OSCC)-derived cell lines. In the current study, to determine the potential involvement of Septin1 in oral carcinogenesis, we evaluated the state of septin1 protein/mRNA expression in OSCC-derived cell lines, oral premalignant lesions (OPLs), and primary OSCCs. A significant (P<0.05) increase in Septin1 expression was evident in all OSCC-derived cell lines examined compared to human normal oral keratinocytes (HNOKs) and OPLs. In immunohistochemistry, while the vast majority of the OSCCs (89%) were positive for Septin1, no immunoreaction was observed in corresponding normal tissues and OPLs. In addition, real-time quantitative reverse transcriptase-polymerase chain reaction (QRT-PCR) data were consistent with the protein expression status. These results suggest that Septin1 expression could contribute to cancer progression, proliferation, or both, and that Septin1 may be a potential diagnostic marker of highly active cancer and a therapeutic target for OSCCs.
authors.affiliation: Department of Clinical Molecular Biology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
authors.forename: Yoshikuni
authors.initials: Y
authors.lastname: Kato
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Uzawa
authors.forename: Nobuharu
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Yukinao
authors.initials: Y
authors.lastname: Kouzu
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Koike
authors.forename: Masashi
authors.initials: M
authors.lastname: Shiiba
authors.forename: Hiroki
authors.initials: H
authors.lastname: Bukawa
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Yokoe
authors.forename: Takahiko
authors.initials: T
authors.lastname: Shibahara
authors.forename: Hideki
authors.initials: H
authors.lastname: Tanzawa
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000209:etiology* / Q000378:metabolism / Q000401:mortality; D045744:Cell Line, Tumor; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000209:etiology* / Q000378:metabolism / Q000401:mortality; D010744:Phosphoric Monoester Hydrolases / Q000032:analysis / Q000235:genetics / Q000502:physiology*
chemical_list: D010744:Phosphoric Monoester Hydrolases