title: [Biologic analysis of recombinant human adenovirus-p53 injection in patients with oral leukoplakia ].
abstract: OBJECTIVE
  Advances in tumor biology and clinical trials indicate that p53 transfer is an alternative therapy for head and neck squamous cell carcinoma. The aim of this study is to evaluate the biologic activity of multiple intraepithelial injections of Ad-p53 in patients with dysplastic oral leukoplakia, which is the most common premalignant lesion of the oral squamous cell carcinoma.
  
  
  METHODS
  From 2006 to 2007, 18 Chinese patients clinically and histopathologically diagnosed as dysplastic oral leukoplakia were recruited for this study. On a 15-day cycle, intraepithelial injections of Ad-p53 were administered once every three days at dose levels dependent upon lesion size/dose escalation sequence (1 x 10(8) vp). 24-48 h after the last injection, incisional biopsy were performed, and immunohistochemistry was used to examine the protein expression of P53 and P21(CIP/WAF).
  
  
  RESULTS
  In the postreatment patients, P53 protein and P21(CIP/WAF) protein expression were significantly enhanced (100%, 89.9%, respectively) and statistical analysis revealed the expression of P53 protein had a positive correlation with that of P21(CIP/WAF) protein (r=0.598, P<0.01).
  
  
  CONCLUSIONS
  Intraepithelial injections of gendicine is biologically active in patients with dysplastic oral leukoplakia. It may be a promising treatment for oral leukoplakia.
authors.affiliation: Dept. of Head and Neck Oncology Surgery, Henan Province Tumor Hospital, Zhengzhou 450008, China.
authors.forename: Song-tao
authors.initials: ST
authors.lastname: Zhang
authors.forename: Yuan-yuan
authors.initials: YY
authors.lastname: Zhang
authors.forename: Xiao-yu
authors.initials: XY
authors.lastname: Li
authors.forename: Long-jiang
authors.initials: LJ
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Ning
authors.initials: N
authors.lastname: Gao
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000260:Adenoviruses, Human; D001688:Biological Products; D002294:Carcinoma, Squamous Cell; D006801:Humans; D007150:Immunohistochemistry; D007972:Leukoplakia, Oral; D016159:Tumor Suppressor Protein p53
chemical_list: D001688:Biological Products; D016159:Tumor Suppressor Protein p53