Objective To discuss the correlation of the p53 overexpression and human papilloma virus (HPV) infection with the occurrence, development of the vulvar squamous cell carcinoma in elderly women. Methods Samples from 68 patients with vulvar squamous cell carcinoma and samples of formalin-fixed paraffin-embedded blocks from 38 patients with vulvar dystrophy were determined by immunohistochemistry. HPV infection was examined with monoclonal or polyclonal antibodies. Fifteen normal vulvar skin samples were used as controls. Results Positive expression rate of p53 and HPV in vulvar squamous cell carcinoma samples were 54.4% and 45.6% respectively, in the dystrophy samples were 18.4% and 55.3% respectively. All showed significant difference between the two groups. None was positive in the controls. Conclusions There are high expression of p53 and HPV in the elderly women with vulvar squamous cell carcinoma. p53 mutation and high risk HPV infection play an important role in the development of vulvar squamous cell carcinoma.

[ Objective] To compare the protective mechanism of Zuojin Pill (Rhizoma Coptidis: Fructus Evodiae = 6:1) and Fan Zuojin Pill (Rhizoma Coptidis: Fructus Evodiae = 1: 6) on gastric secretion and gastric mucosal barrier. [Methods] Pylorus - ligated rat model was applied. Rats were divided into normal saline group, Zuojin Pill groups (1.4 g/kg and 2.8 g/kg) and Fan Zuojin Pill groups (1.4g/kg and 2.8g/kg) and then the drugs were given by duodenal feeding. Gastric secretion and gastric mucus synthesis were examined. [Results] Zuojin Pill and Fan Zuojin Pill (1.4 g/kg and 2.8 g/kg) both inhibited gastric secretion and decreased total acid output and pepsin activity in a dose- effect manner. Zuojin Pill and Fan Zuojin Pill also increased the content of gastric adherent mucus (GAM) and tended to elevate the mucus level in gastric juice. [Conclusion] The preventive mechanism of Zuojin Pill and Fan Zuojin Pill on gastric mucosa may be related to the regulation of gastric secretion and gastric mucus synthesis.