Objective To evaluate the effects of turmeric volatile oil (TVO) combined with cisplatin on the proliferation and apoptosis of a human cutaneous squamous cell carcinoma cell line A431,and to explore their mechanisms.Methods Some cultured A431 cells at exponential growth phase were divided into several groups to be treated with 5,10,20,40 and 80 mg/L TVO,as well as high-glucose Dulbecco's modified Eagle's medium (DMEM) containing 1％ dimethyl sulfoxide (DMSO,control group),respectively.After 24-hour treatment,cell counting kit 8 (CCK8) assay was performed to estimate the proliferative activity of A431 cells in the above groups.Some other A431 cells were divided into 4 groups:control group treated with high-glucose DMEM containing 1％ DMSO,TVO group treated with 40 mg/LTVO,cisplatin group treated with 10 mg/L cisplatin,and TVO + cisplatin group treated with 40 mg/L TVO and 10 mg/L cisplatin.After 24-hour treatment,CCK8 assay was performed to estimate the cellular proliferative activity,inverted microscopy to observe changes in cell morphology,fluorescence microscopy to detect cell apoptosis after acridine orange (AO)/ethidium bromide (EB) double-staining,colorimetry to evaluate the activity of Caspase-3 and Caspase-9,and Western blot analysis to determine the protein expression of Caspase-3 and p-glycoprotein.Results After 24-hour treatment with 5,10,20,40 and 80 mg/L TVO,the cell proliferation rates were inhibited by (12.83 ± 6.4)％,(16.27 ± 11.4)％,(21.61 ± 9.1)％,(33.11 ± 2.0)％ and (46.00 ± 3.3)％ respectively,and the inhibition rates were all significantly higher in these groups than in the control group (4.03％ ± 1.4％,all P ＜ 0.05).The 50％ inhibitory concentration (IC50) of TVO at 24 hours was (61.66 ± 1.03) mg/L.Compared with the control group,the proliferation inhibition rates significantly increased in the TVO group,cisplatin group and TVO + cisplatin group (all P ＜ 0.05),suggesting that the combination of TVO and cisplatin showed synergistic inhibitory effects with a combination index of 1.366.Moreover,A431 cells turned round to different extents and became apoptotic in the TVO group and cisplatin group,and the TVO + cisplatin group showed obviously decreased number of cells and a large number of cell debris.The TVO + cisplatin group also showed significantly increased activity of Caspase-3 (1.520 ± 0.115) and Caspase-9 (2.760 ± 0.297) as well as protein expression of Caspase-3 (1.482 ± 0.016) compared with the TVO group (Caspase-3 activity:1.117 ± 0.095;Caspase-9 activity:1.259 ± 0.059;Caspase-3 protein expression:1.156 ± 0.006,all P ＜ 0.01) and cisplatin group (Caspase-3 activity:1.381 ± 0.089;Caspase-9 activity:1.829 ± 0.171;Caspase-3 protein expression:1.296 ± 0.021,all P ＜ 0.01),but significantly decreased p-glycoprotein expression (0.528 ± 0.014) compared with the TVO group (1.311 ± 0.011,P ＜ 0.01) and cisplatin group (1.169 ± 0.012,P ＜ 0.01).Conclusion TVO combined with cisplatin can synergistically inhibit the proliferation of A431 cells and induce cell apoptosis,which may be associated with activation of the caspase system and decreased expression of pglycoprotein.

Objective To establish a neural network model based on enhanced CT for distinguishing ISUP grade of clear cell renal cell carcinoma (ccRCC). Methods We collected 131 cases of ccRCC, with 92 cases of low ISUP grade and 39 cases of high ISUP grade. Patients were divided into training set and validation set according to 5:5 stratified sampling. The enhanced CT images of each ccRCC patient were evaluated by the radiologist. Recursive feature elimination (RFE) was used to reduce the dimension of patients' general features and enhanced CT features, which was used for neural network modeling and validation. Results Patients' general features and enhanced CT features were verified by RFE method and then reduced to 14 features. The top 5 features were growth pattern, necrosis, enlargement of lymph nodes, tumor size and capsule. The AUC of the neural network model based on these 5 features in training set was 0.8844 (95%CI: 0.8062-0.9626), sensitivity was 89.47% and specificity was 82.61%; and those in validation set were 0.7924 (95%CI: 0.6567-0.9280), 75.00% and 86.96%, respectively. Conclusion The neural network model of ccRCC ISUP grade based on enhanced CT has relatively high diagnostic efficiency.

OBJECTIVETo examine the expression of cytokine-induced apoptosis inhibitor1 (CIAPIN1) in gastric cancer and normal mucosa tissues, and to investigate its effects on migration and invasion of gastric cancer cells.

METHODSImmunohistochemistry was used to detect CIAPIN1 expression in 15 samples of normal gastric mucosa tissues, 148 samples of gastric cancer tissues (42 of non-metastasis gastric cancer tissues without other organs or lymph node metastasis, 106 of metastasis gastric cancer tissues with lymph node metastasis), and 37 samples of gastric cancer lymph node metastasis tissues. Association of CIAPIN1 expression with clinicopathological characteristics of gastric cancer was analyzed by Chi-square test. SGC-7901 cell lines of high CIAPIN1 expression and low CIAPIN1 expression were established. Transwell assay was applied to detect the invasion and migration of CIAPIN1-regulated gastric cancer cells.

RESULTSPositive rate of CIAPIN1 expression in gastric cancer tissues was lower than that in normal gastric mucosa tissues (41.2% vs. 86.7%, P=0.0008), and in metastasis gastric cancer tissues was also lower than that in non-metastasis gastric cancer tissues (34.9% vs. 71.4%, P=0.0000). Furthermore, the positive rate of CIAPIN1 expression was closely related to the TNM staging of gastric cancer (TNM stage I(, II( and III( were 55.0%, 53.5% and 24.4%, respectively, P=0.0037). But there was no significant difference of positive expressive rate between metastatic gastric cancer tissues and metastatic lymph node tissues(34.9% vs. 21.6%, P=0.3700). Transwell assay showed that up-regulated CIAPIN1 expression would significantly reduce, while down-regulated CIAPIN1 expression would significantly promote the invasion and migration of SGC-7901 cells (all P<0.05).

CONCLUSIONPositive rate of CIAPIN1 expression is low in gastric cancer tissues and shows inhibition of invasion and migration of gastric cancer cells.

Cell Line, Tumor ; Down-Regulation ; Humans ; Immunohistochemistry ; Intracellular Signaling Peptides and Proteins ; metabolism ; Lymphatic Metastasis ; Neoplasm Staging ; Stomach Neoplasms ; metabolism ; Up-Regulation