ObjectiveTo study the relationship between mutation of the p53 gene, p21 gene and bacteria Lform in gallbladder carcinoma. MethodsForty cases of gallbladder carcinoma and 40 cases of chronic cholecystitis were studied by using Gram staining and immunohistochemistry (SP method) to detect the positive rate of Lforms antigen, p21 and p53 protein overpression. And the relationship between the expression of p21 and p53 in Lform infection positive group and that in Lform infection negative group was discussed. ResultsThere was no statistical difference between the Lform positive rate in patients with gallbladder carcinoma with Gram staining and immunohistochemistry (Pgt;0.05). The positive expression rate of p21 and p53 in gallbladder carcinoma was 62.5%(25/40) and 65.0%(26/40) respectively. The expression values of p21 and p53 in chronic cholecystitis was 2.5%(1/40) and 5.0%(2/40) respectively, which was significantly different from that of gallbladder carcinoma (P＜0.05). The expression of p21 and p53 was significantly higher in Lform infection positive group than in that with Lform infection negative group (P＜0.05). ConclusionBacteria Lform may be one of the direct factor leading to mutation of p53 and p21 during gallbladder oncogenesis.
目的 評價凋亡相關基因bcl-2、p53的表達與乳腺癌新輔助化學療法（化療）療效的關系。 方法 計算機檢索Cochrane、Pubmed、Embase、中國知網、萬方、維普等數據庫，2003年4月－2013年4月bcl-2、p53蛋白與乳腺癌新輔助化療的病例對照研究，應用RevMan 4.2統計軟件進行定量分析。 結果 共納入15篇病例對照研究，bcl-2與乳腺癌新輔助化療6篇，治療有效279例，其中bcl-2表達陽性159例；治療無效115例，其中bcl-2表達陽性57例。p53與乳腺癌新輔助化療13篇，治療有效679例，其中p53表達陽性249例；治療無效341例，其中p53表達陽性195例。Meta分析結果顯示，bcl-2表達的陽性率與乳腺癌新輔助化療療效無統計學意義[OR=1.40，95%CI（0.89，2.18），P=0.14]，而p53表達的陽性率與乳腺癌新輔助化療療效有統計學意義[OR=0.46，95%CI（0.26，0.80），P=0.007]。 結論 p53可以作為乳腺癌新輔助化療療效敏感性的一個指標，對乳腺癌新輔助化療有提示作用。