Hyperthermia enhanced the killing effect of 5-fluorocytosine on human colon cancer cell line transfected with cytosine deaminase gene / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate whether hyperthermia can enhance the killing effect of 5- fluorocytosine (5- FC) on human colorectal carcinoma cell lines SW480 transfected with carcinoembryonic antigen (CEA) tissue- specific cytosine deaminase (CD) gene in vitro,and study its mechanism.</p><p><b>METHODS</b>Human colorectal carcinoma cell lines SW480 transfected with G1CEACDNa were cultured. The proliferated colonies were treated with the combined therapy of 5-FC and hyperthermia at a temperature of 43 degrees C for 30 min. After eight days, MTT was used to calculate the cellular survival rate,to analyze the killing effect of 5-FC combined with hyperthermia on SW480 cells transfected with CD gene. Flow cytometry was performed to analyze the cellular cycle and transmission electron microscope was used to observe the morphologic changes of SW480 cells after thermochemotherapy.</p><p><b>RESULTS</b>Hyperthermia combined with 5-FC had an enhanced killing effect on SW480-CEACD cells than 5-FC alone (P< 0.05, t =2.403, n=9). Flow cytometry revealed that the proportion of S stage cell increased in the group treated with hyperthermia and 5- FC (P< 0.001, t =7.158, n=6). Transmission electron microscope showed apoptosis after thermo- chemotherapy.</p><p><b>CONCLUSIONS</b>Hyperthermia can improve the anti- tumor effect of 5- FC on human colorectal carcinoma cell lines SW480 transfected with CD gene, and the cells were blocked at S stage of cellular cycle and apoptosis was induced following thermochemotherapy.</p>

Effect of compound branch chain amino acids injection (Aminic) on protein metabolism in patients with radical resection of cardiac carcinoma / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To evaluate the effect of compound branch chain amino acids injection (Aminic) on protein metabolism in patients with radical resection of cardiac carcinoma.</p><p><b>METHODS</b>Eighty patients with radical resection of cardiac carcinoma were randomly divided into two groups:study group (40 cases) with compound branch chain amino acids injection (Aminic), and control group(40 cases) with amino acids(MPR- F). The patients received total parenteral nutrition with equal calorie and nitrogen from 1st-7th days after operation by central or peripheral vein with infusing time over 12 hours per day. The change of body weight was observed. The serum levels of total protein, albumin,pre-albumin,transferring, and fibronectin were measured.</p><p><b>RESULTS</b>The body weight was decreased in the two groups after operation, while compared with the study group,the body weight was significantly decreased in the control group (P=0.0250). The positive nitrogen balance recovered two days earlier in study group than that in the control group. Decrease of total protein,albumin were more severe in the control group than those in study group (P=0.0446,P=0.0314 respectively). Compared with the control group,the level of Valine was increased (P=0.0073),and the level of Arginine was decreased more obviously in the study group (P= 0.0212).</p><p><b>CONCLUSION</b>The compound branch chain amino acids injection (Aminic) is more beneficial for patients with radical resection of cardiac carcinoma to correct negative nitrogen balance,it can also inhibit decomposition of muscles protein,and improve nutritional conditions.</p>

Expression of matrix metalloproteinase 2 in oral verruvous carcinoma and squamous cell carcinoma / 中南大学学报(医学版)

OBJECTIVE@#To determine the expression of MMP2 mRNA in oral verruvous carcinoma and squamous cell carcinoma.@*METHODS@#Thirty cases were divided into 3 groups: verruvous carcinoma (n = 10), well-differentiated squamous cell carcinoma (n = 15) and moderately or poorly differentiated squamous cell carcinoma (n = 5). Reverse transcription polymerase chain reaction (RT-PCR) was used to test the expression of MMP2 mRNA in the carcinoma tissues and matched normal tissues from 3 groups above.@*RESULTS@#The expression of MMP2 mRNA in the carcinoma tissues was significantly higher than that in their matched normal tissues (P 0.05).@*CONCLUSION@#The expression of MMP2 mRNA in oral verruvous carcinoma and squamous cell carcinoma tissues was significantly higher than that in their matched normal tissues. The expression of MMP2 mRNA in verruvous carcinoma was significantly higher than that in squamous cell carcinoma.