Tumor suppressor of lung cancer 1 (TSLC1) mediates cell-cell and cell-extracellar matrix adhesion, cellular signal transduction and immunoregulation, and additionally plays a vital role in inhibiting proliferation, migration and metastasis of tumor cells. As a novel tumor suppressor gene, TSLC1 may be regarded as a potential molecular marker for diagnosis and a pharmaceutical target. Consequently, to explore the functions and mechanism of TSLC1 in initiation and development of carcinomas has become one of the popular researches currently.

Objective To investigate the expression and clinical significance of C1orf63 in breast cancer.Methods Sixty-seven breast cancer tissues and adjacent non-cancerous tissues were collected,and the expression of C1orf63 was detected by immunohistochemistry.The relationships between C1orf63 and clinical pathological characteristics were examined withx2 test.Independent prognostic factors were performed by theCox regression model.Results Positive cytoplasmic expression of C1orf63 was observed in 21 (31.3％) of 67 primary tumors,but not in their matched adjacent non-cancerous tissues,with significant difference (x2 =24.90,P ＜ 0.01).There were no relationships between C1orf63 and age (x2 =0.06,P =0.79),T stage (x2 =0.50,P =0.47),N stage (x2 =1.41,P =0.23),TNM stage (x2 =0.29,P =0.58),estrogen receptor (x2=0.82,P =0.36),progesterone receptor (x2=0.31,P =0.57),and human epidermal growth factor receptor 2 (Her2) expression (x2 =0.00,P =0.98).Multivariate analysis demonstrated N stage (HR =4.96,95％CI:2.03-12.15,P＜0.01) and C1orf63 (HR=2.37,95％CI:1.05-5.37,P=0.04) were unfavorable prognostic factors.Conclusion The high expression of C1orf63 in breast cancer may indicate poor prognosis.

Esophageal cancer related gene 4 (ECRG4) serves as a tumor suppressor gene through interacting with NF-κB and p53 pathways.Multiple studies have demonstrated that the down-regulated expression of ECRG4 occurs in a variety of cancer types,indicating a potential application of ECRG4 as a molecular diagnostic marker as well as a therapeutic target

Amplified in breast cancer 1 ( AIB1 ) plays an important role in the process of gene expression and regulation by combining with nuclear receptor.Aberrant expression of AIB1 has been detected in different types of caners,such as breast cancer,endometrial carcinoma,prostate cancer,esophageal squamous cell carcinoma,colorectal carcinoma,etc.The study of the potential role of AIB1 in the pathogenesis and prognosis will improve our general acknowledge of carcinogenesis.AIB1 may become a new prognostic marker as well as a new therapeutic target.

Objective To evaluate the protein expression of chromosome 2 open reading frame 40 (C2orf40) in nasopharyngeal carcinoma (NPC) tissues and cells,and to explore its association with cell differentiation and clinicopatho]ogical features.Methods A total of 122 patients with NPC between January 2001 and December 2003 were enrolled in Cancer Hospital of Shantou University Medical College.The paraffinembedded tissue sections and medical records were collected.Twenty-five samples with chronic nasopharyngitis were used as controls.Tumor and control tissues from biopsies underwent immunohistochemical staining for C2orf40.C2orf40 expression was analyzed with clinicopathological variables.Besides,the protein expressions of C2orf40 were measured by Western blotting in three NPC cell lines,including CNE1,CNE2 and C666-1.Results Ninety-six percent (24/25) of control tissues showed positive expression,among which 88.0％ showed dense staining.Otherwise,only 58.3％ (71/122) of NPC samples were positive for C2orf40 protein and 82.0％ showed weak staining.There was significantly difference between the two groups (U =255.500,P ＜ 0.001).It was inversely related to lymph nodes status (r =-0.058,P ＜ 0.001) and clinical stage (r =-0.202,P =0.026) by Spearman rank correlation test.In vitro,higher level of C2orf40 protein was found in well differentiated CNE1 cells,while lower levels were found in poorly differentiated cell lines CNE2 and C666-1.Conclusion Down-regulated C2orf40 expression is correlated with tunor cell differentiation,lymph nodes metastasis and clinical stage,and may be a molecular event in the occurrence and development of NPC.C2orf40 is likely to be a potential target of anticancer therapy.

AIM: The study aimed to verify the effects of arsenic trioxide in combination with aspirin on angiogenesis of human gastric cancer xenografts in nude mice. METHODS: Experiments were performed at the Laboratory of Pathology, Xuzhou Medical College from September 2006 to July 2007. A total of 36 male BALB/C-nu/nu nude mice aged 4-6 weeks, weighting 18-22 g were selected. Human gastric cancer cell strain SGC-7901 were purchased from Shanghai Institute of Biology of Chinese Academy of Sciences. Thirty-six nude mouse models of cell strain SGC-7901 lateral armpit subcutaneously transplantation tumor were established and randomized into a control group, a aspirin group, a arsenic trioxide group and a combination group with nine in each group. Seven days after inoculation, nude mice were intraperitoneally administrated with drugs. Nude mice in the control group were treated with sterile saline (0.2 mL/d); Mice in the aspirin group were administrated with aspirin 0.3 g/(kg?d); Mice in the arsenic trioxide group received 2.5 mg/(kg?d); Mice in the combination group were administrated with 2.5 mg/(kg?d)plus aspirin 0.3 g/(kg?d), successively for 14 days. Immunohistochemical method (SP kit) was used to detect the expression of cycloxygenase-2 (COX-2) and CD34, and count microvessel density (MVD). Western-blotting was used to detect the expression of IKK?, I?B, nuclear factor (NF)-?B and vascular endothelial growth factor (VEGF). RESULTS: A total of 27 male BALB/C-nu/nu nude mice were included in the final results. Seven days after inoculation, 1 mm tumor was formed on the back of 31 nude mice. One mouse respectively died in the arsenic trioxide group and the combination group. One mouse died and one loss in the aspirin group. Compared to the aspirin group, arsenic trioxide group and control group, expressions of IKK?, NF-?B and VEGF decreased in the combination group (P

ObjectiveTo examine the expressions of amplified in breast cancer 1(AIB1) and epithelial cadherin (E-cadherin) in ovarian carcinoma (OC) tissues,and determine the correlation between the expression and clinical pathological features.MethodsThe expression of AIB 1,E-cadherin,estrogen receptor (ER),progesterone receptor (PR) and Ki-67 in tissues of 50OCs and 13 normal ovarians tissues were detected by immunohistochemistry(IHC) EnVision two step process analysis.ResultsPositive expression of AIB1 in OC tissues[68％(34/50) ] was obviously higher than that in normal ovarian tissues [8％ (1/13)] (P ＜0.01).Down-regulation of E-cadherin expression was 60％ (30/50).The positive expression of AIB1 was significantly higher in stage Ⅲ and Ⅳ than in stage Ⅰand Ⅱ according to International Federation of Gynecology and Obstetrics (FIGO) stage (P =0.036),in lymph node metastasis group than in none lymph node metastasis group ( P =0.027 ),in stage G3 than in stage G1 and G2 according to Silverberg stage (P =0.003),and in serous adenocarcinoma group than in non-serous adenocarcinoma group (P=0.049);positive rates of ER and Ki-67 were higher than negative rates of ER(P=0.000) and Ki-67 (P =0.009) respectively.Down-regulation of E-cadherin expression was higher in FIGO stage Ⅲ and Ⅳ than in stage Ⅰ and Ⅱ (P =0.044),in serous adenocarcinoma group than in non- serous adenocarcinoma group ( P =0.022) ; positive rates of ER and Ki-67 were higher than negative rates of ER ( P =0.02 1 ) and Ki-67 (P=0.035) respectively.The expression of AIB1 was negatively correlated with E-cadherin expressioh (P =0.026).ConclusionsThe expressions of AIB1 and E-cadherin in OC tissues is closely related to clinical stage.Therefore,AIB1 and E-cadherin may be important moleculars involved in the progression of OC.

Fluorescent carbon quantum dots ( CQDs) were synthesized by one-step hydrothermal treatment of apple juice. Experiments showed that Hg2+could quench the fluorescence of the CQDs with specificity. Based on this phenomenon, a selective and sensitive sensor was constructed for Hg2+ detection. In a NaH2 PO4-Na2HPO4 buffer solution (pH 7. 0), their fluorescence intensity showed good linear relationship with the concentrations of Hg2+ from 5 to 100 nmol/L and 1 to 50 μmol/L, respectively, with the detection limit of 2. 3 nmol/L (S/N=3). Its practical application was further demonstrated by the detection of Hg2+ in real water samples.

OBJECTIVE: To establish a CDDP-resistant cell line from human nasopharyngeal carcinoma and evaluate its biological characteristics. METHOD: By continuously exposing and gradually increasing dose of cisplatin (CDDP), a resistant nasopharyngeal carcinoma cell line (HNE1/CDDP) was established. Drug sensitivity of this cell line was detected by MTT assay; the alterations of its biological characteristics were determined using light microscopy, cell counting and flow cytometry (FCM); its ability of adhesion, migration and invasion were also evaluated. RESULT: HNE1/CDDP cell line was developed after 10 months with stable resistance to cisplatin with the resistance index was 5.83. HNE1/CDDP cell exhibited cross-resistance to many other chemotherapeutic agents (carboplatin, oxaliplatin and etoposide, etc). The morphology of HNE1/CDDP changed; doubling time prolonged; and the cell number of S-phase and G2/M-phase decreased while of G0/G1 phase increased compared with parental cells. The ability of adhesion, migration and invasion had no difference between the parental and the resistant cells. CONCLUSION HNE1/CDDP cell line shows the typical and stable resistant phenotype and can be used as a research model.
Antineoplastic Agents ; pharmacology ; Cell Line, Tumor ; Cisplatin ; pharmacology ; Drug Resistance, Multiple ; Drug Resistance, Neoplasm ; Humans ; Nasopharyngeal Neoplasms