ABSTRACT
Objective To investigate PLCE1 protein expression in esophageal squamous cell carcinoma (ESCC)tissues,and understand the effect of PLCE1 protein expression on the prognosis of patients with ESCC.Methods The PLCE1 protein were detected in 85 patients with surgically resected ESCC paraffin-embedded tissue using immunohistochemical staining,the patients' information were selected from March 1997 to December 2011 in the database of the Henan Key Laboratory for Esophageal Cancer Research,and the survival analysis were operated with Kaplan Meier single factor and Cox multivariate regression.Results In the 85 cases,the lost to follow-up were 5 cases,the follow-up rate was 94.1％ (80/85).In the 80 cases with ESCC,the positive expression rate of PLCE1 was 77.5％ (62/80).PLCE1 positive expression was not significantly associated with differentiation,infiltration depth,lymph node metastasis and family history with ESCC (P ＞ 0.05).The univariate survival analysis by Kaplan-Meier showed that protein expression of PLCE1 had no significant association with overall survival (P ＞ 0.05).Cox regression survival analysis showed that the lymph node metastasis was associated with the survival time of ESCC patients [the relative risk were 1.763,95％ CI(1.008,3.084),P =0.047].Conclusion The expression of PLCE1 protein was involved in mechanism of ESCC,and might not predicted the prognosis of the patients with ESCC.
ABSTRACT
<p><b>OBJECTIVE</b>To identify the relationship between amino acid mutations in Neisseria gonorrhoeae isolates and their antibiotic resistance.</p><p><b>METHODS</b>PI gene fragments of Neisseria gonorrhoeae from 17 clinical isolates were obtained with PCR amplification. They were cloned into the PCR cloning vector pBS-T to form pBS-T-PI and sequenced. The sequences of PI genes were analyzed. At the same time, minimum inhibitory concentration (MIC) of penicillin and tetracycline to these 17 isolates were measured and contrasted with the corresponding PI sequence.</p><p><b>RESULTS</b>The recombinants of PI gene from 17 clinical isolates of Neisseria gonorrhoeae were successfully constructed and sequenced. They were divided into PIA and PIB subtypes according to the results from blastn software by comparing the sequences with the GenBank. Mutations were found at the sites of 120 and 121. There were only some of the sequences having an aspartic acid (D) mutation on 120 and 121 sites, which was not the same as reported. On the other hand,there were two PI sequences,5-9 and 6-1, whose mutations on No. 120 were lysine, similar to those documented.</p><p><b>CONCLUSION</b>Some relationship between PI amino acids mutations at sites 120 and 121 in Neisseria gonorrhoeae isolates from Chengdu, China and their resistance to penicillin and tetracycline were found. However,further studies need to be done in the future to confirm this hypothesis.</p>