title: High expression of Jun activation domain-binding protein 1 (Jab1) is a strong prognostic marker in oral squamous cell carcinoma patients treated by UFT in combination with radiation.
abstract: Low expression of p27Kip1 is associated with disease progression and an unfavorable outcome in several malignancies, including oral squamous cell carcinoma (OSCC). In addition, the p27Kip1 protein is thought to be degraded by the Jun activation domain-binding protein 1 (Jab1). The purpose of this study was to examine whether Jab1 expression can be a useful prognostic factor in OSCC patients treated by 1 M Tegafur and 4 M uracil (UFT) in combination with radiation. Jab1 expression was investigated by immunohistochemistry in biopsy samples from 102 OSCC patients who were treated by UFT in combination with radiation. The associations of each expression with the clinicopathological characteristics and patient survival were also analyzed. A significant association was found between Jab1 expression and cervical lymph node metastasis (p=0.0004), stage of disease (p=0.0011), therapeutic effect (p=0.0133) and patient outcome (p=0.0095). The 5-year survival rates of Jab1 high- and low-expression tumors were 53.0% and 80.6%, respectively and this difference was significant (p=0.0053) by the log-rank test. Multivariate analysis revealed that reduced term survival was related to high levels of Jab1 expression (p=0.0082). These results suggest that Jab1 may be a useful prognostic factor in OSCC patients treated by UFT in combination with radiation.
authors.affiliation: Department of Therapeutic Regulation for Oral Tumor, Institute of Health Bioscience, University of Tokushima Graduate School, Tokushima 770-8504, Japan. harako@dent.tokushima-u.ac.jp
authors.forename: Koji
authors.initials: K
authors.lastname: Harada
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Kawashima
authors.forename: Hideo
authors.initials: H
authors.lastname: Yoshida
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Sato
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage / Q000627:therapeutic use*; D000075686:COP9 Signalosome Complex; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000378:metabolism* / Q000532:radiotherapy / Q000628:therapy*; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000532:radiotherapy / Q000628:therapy*; D010447:Peptide Hydrolases / Q000096:biosynthesis*; D011379:Prognosis; D005641:Tegafur / Q000008:administration & dosage; D014498:Uracil / Q000008:administration & dosage
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; D005641:Tegafur; D014498:Uracil; D010447:Peptide Hydrolases; C501488:COPS5 protein, human; D000075686:COP9 Signalosome Complex