ABSTRACT
Objective To investigate the relationship between the expressions of maspin gene in colorectal membrane,and their roles in the occurrence,progression,metastasis and prognosis of colorectal adenocarcinoma.Methods Immunohistochemistry technique was used to detect the expression of maspin in tissues of normal controls,adenoma,colorectal adenocarcinoma primary tumor,liver metastasis,lymph-node metastasis respectively.Results The expressions of maspin in normal controls,adenoma and colorectal adenocarcinoma primary tumor are down-regulated successively; the expression of maspin in colorectal adenocarcinoma with metastasis is lower than that in colorectal adenocarcinoma without metastasis(P＜0.05) ; the down-regulation of maspin expression is significantly correlated with the depth of invasion,differentiation,liver metastasis and lymph node metastasis of colorectal adenocarcinoma(P＜0.01,P＜0.05,P＜0.01,P＜0.05).Conclusion The down-regulation of expression of maspin probably plays an important role in the occurrence,progression and metastasis of colorectal adenocarcinoma.maspin is probable a predictive index for reflecting the metastasis of colorectal adenocarcinoma and provide a clue for early diagnosis of metastasis of colorectal adenocarcinoma.
ABSTRACT
Objective To compare the accuracy of BIS and skin conductance (SC) for assessment of the depth of sedation induced by target-controlled infusion (TCI) of propofol. Methods Thirty ASA Ⅰ orⅡpatients aged 21-56 yr weighing 52-85 kg undergoing orthopedic operation on the lower limb under epidural anesthesia were enrolled in this study.After the onset of epidural anesthesia, TCI of propofol was started at an initial target plasma concentration (Cp) of 0.8 μg/ml. Th Cp was increased by 0.5-0.8 μg/ml every 3 min until OAA/S score=1. OAA/S score, BIS and SC values were recorded, SC change value (△SC) was calculated. Spearman rank-order correlation, receiver operating characteristic curve (area under curve AUC was calculated) and logistic regression were used to analyze the relationship of OAA/S score to BIS and △SC.Results BIS and △SC were significantly correlated with OAA/S scores (r were 0.920 and-0.859 respectively). The AUC of △SC (0.919, 0.946) was significantly better correlated with OAA/S score (5→4, 4→3) than that of BIS (0.761, 0.507), while BIS was better correlated (0.781, 0.959) with OAA/S score (3→2, 2→1) than ASC (0.577, 0.630). Logistic regression correctly predicted loss of consciousness. The accuracy of prediction was 93% for BIS and 82% for △SC. Conclusion The accuracy of SC for assessment of the depth of sedation induced by propofol TCI ishigher than that of BIS before loss of consciousness,while lower than that of BIS after loss of consciousness. BIS is more accurate in monitoring the loss of consciousness.