Abstract:
AIM:To investigate the effects of osteopontin (OPN) gene expression knockdown on colon cancer Lovo cells in vitro. METHODS:Four candidate small interfering RNA (siRNA) constructs targeting the OPN gene and a scrambled control sequence (NC-siRNA) were synthesized and inserted into a pGPU6/GFP/Neo expression vector. After confirmation by restriction enzyme digestion and DNA sequencing, the recombinant plasmids were subsequently transfected into a human colon cancer cell line (Lovo) using a liposome transfection method. Stably transfected cells were maintained with G418 selection and referred to as Lovo-OPN-1, -2, -3, -4, and Lovo-NC cells. Knockdown efficiency of each of the four siRNA constructs was determined by real-time reverse transcription polymerase chain reaction assays and western blotting, and the construct with the most effective silencing was used for subsequent experiments. Cell proliferation, adhesion, and Matrigel invasion assays were performed to analyze the effects of OPN knockdown in stably transfected Lovo cells. The levels of four angiogenic factors, namely vascular endothelial growth factor (VEGF), matrix metalloproteinase (MMP)-2, MMP-9 and urokinase plasminogen activator were detected by enzyme-linked immunosorbent assays (ELISA). RESULTS:Recombinant vectors containing OPN-specific and scrambled siRNA sequences were successfully constructed and stably transfected into Lovo cells. Compared with the control Lovo and Lovo-NC cells, the levels of OPN mRNA and protein expression in Lovo-OPN-1, -2, -3, and -4 were significantly reduced (all P < 0.05), with the most efficient reduction observed in Lovo-OPN-4 cells (P < 0.05). Relative to untransfected Lovo cells, OPN mRNA expression levels in Lovo-NC and Lovo-OPN-4 cells were 1.008 ± 0.067 and 0.160 ± 0.023, respectively. The relative OPN protein expression levels in Lovo, Lovo-NC, and Lovo-OPN-4 cells were 3.024 ± 0.211, 2.974 ± 0.630, and 0.121 ± 0.008, respectively. Moreover, transfection with the scrambled sequence had no effect on the expression of OPN. After 24, 48, 72, and 96 h of cultivation, absorption values at 450 nm to assess proliferation of Lovo-OPN-4 cells were 0.210 ± 0.017, 0.247 ± 0.024, 0.314 ± 0.037, and 0.359 ± 0.043, respectively, which were significantly lower than those of Lovo (0.244 ± 0.031, 0.313 ± 0.024, 0.513 ± 0.048 and 0.783 ± 0.051) and Lovo-NC cells (0.241 ± 0.029, 0.309 ± 0.022, 0.563 ± 0.023, and 0.735 ± 0.067) (all P < 0.05). The absorption values at 595 nm, which were measured in a cell adhesion assay, showed that adhesion of Lovo-OPN-4 cells (0.215 ± 0.036) was significantly decreased compared to Lovo (0.490 ± 0.037) and Lovo-NC cells (0.462 ± 0.043) (P < 0.05). The number of invasive Lovo-OPN-4 cells (16.1 ± 1.9) was also significantly decreased compared to Lovo (49.9 ± 5.4) and Lovo-NC cells (48.8 ± 4.5) (P < 0.05). ELISA assays showed significant reductions in Lovo-OPN-4 cells compared to Lovo and Lovo-NC cells with regard to the expression of VEGF (1687.85 ± 167.84 ng/L vs 2348.54 ± 143.80 ng/L and 2284.39 ± 138.62 ng/L, respectively), MMP-2 (2966.07 ± 177.36 μg/L vs 4084.74 ± 349.54 μg/L and 4011.41 ± 424.48 μg/L, respectively), MMP-9 (3782.89 ± 300.64 μg/L vs 5062.90 ± 303.02 μg/L and 4986.38 ± 300.75 μg/L, respectively) and uPA (1152.69 ± 120.79 μg/L vs 1380.90 ± 147.25 μg/L and 1449.80 ± 189.92 μg/L, respectively) (all P < 0.05). CONCLUSION:Knockdown of OPN gene expression suppresses colon cancer cell growth, adherence, invasion, and expression of angiogenic factors.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Wu XL,Lin KJ,Bai AP,Wang WX,Meng XK,Su XL,Hou MX,Dong PD,Zhang JJ,Wang ZY,Shi Ldoi
10.3748/wjg.v20.i30.10440subject
Has Abstractpub_date
2014-08-14 00:00:00pages
10440-8issue
30eissn
1007-9327issn
2219-2840journal_volume
20pub_type
杂志文章abstract:AIM:To investigate the ultrastructure of abnormal hepatocyte mitochondria, including their cellular and hepatic zonal distribution, in bioptates in pediatric non-alcoholic steatohepatitis (NASH). METHODS:Ultrastructural investigations were conducted on biopsy liver specimens obtained from 10 children (6 boys and 4 gir...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i15.4335
更新日期:2014-04-21 00:00:00
abstract:BACKGROUND:It is unclear whether immune escape-associated mutations in the major hydrophilic region of hepatitis B virus surface antigen (HBsAg) are associated with nucleoside/nucleotide analog resistance. AIM:To evaluate the association between immune escape-associated mutations and nucleoside/nucleotide analog resis...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v26.i35.5314
更新日期:2020-09-21 00:00:00
abstract:AIM:To evaluate a laparoscopic approach to gallbladder lesions including polyps, wall-thickening lesions, and suspected T1 and T2 gallbladder cancer (GBC). METHODS:We performed 50 cases of laparoscopic whole-layer cholecystectomy (LCWL) and 13 cases of laparoscopic gallbladder bed resection (LCGB) for those gallbladde...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v23.i14.2556
更新日期:2017-04-14 00:00:00
abstract:AIM:To investigate the effect of antiviral therapy with nucleoside analogs in hepatitis B virus (HBV)-related cirrhosis and esophageal varices. METHODS:Eligible patients with HBV-related cirrhosis and esophageal varices who consulted two tertiary hospitals in Beijing, China, the Chinese Second Artillery General Hospit...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,多中心研究
doi:10.3748/wjg.v19.i40.6849
更新日期:2013-10-28 00:00:00
abstract::Cystic dystrophy of the duodenal wall is a rare form of the disease which was described in 1970 by French authors who reported the presence of focal pancreatic disease localized in an area comprising the C-loop of the duodenum and the head of the pancreas. German authors have defined this area as a "groove". We report...
journal_title:World journal of gastroenterology
pub_type: 社论,评审
doi:10.3748/wjg.v17.i39.4349
更新日期:2011-10-21 00:00:00
abstract:AIM:To prospectively evaluate the effectiveness and safety of continuous wound infiltration (CWI) for pain management after open gastrectomy. METHODS:Seventy-five adult patients with American Society of Anesthesiologists (ASA) Physical Status Classification System (ASA) grade 1-3 undergoing open gastrectomy were rando...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,随机对照试验
doi:10.3748/wjg.v22.i5.1902
更新日期:2016-02-07 00:00:00
abstract:AIM:To assess the incidence of infantile colic and its association with variable predictors in infants born in a community maternity hospital, Tehran, Iran. METHODS:In this prospective cohort study, mothers who gave birth to live newborns between February 21 and March 20, 2003 at the hospital were invited to join to t...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.4662
更新日期:2008-08-07 00:00:00
abstract:AIM:To detect the expression of mitochondrial uncoupling protein 2 (UCP2) in colon cancer and analyze the relation between UCP2 expression and clinical pathological features of colon cancer. METHODS:Fifteen colon tissue samples and 15 its adjacent tissue samples were obtained from colon cancer patients during surgical...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v16.i45.5773
更新日期:2010-12-07 00:00:00
abstract:BACKGROUND:Conventionally, the low luminous intensity, low image resolution, and difficulty in operation have been reported with the ultrathin endoscope. However, it has markedly advanced recently. The improvement of the diagnostic ability is expected. AIM:To compare the early gastric cancer diagnostic ability of an u...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v25.i11.1378
更新日期:2019-03-21 00:00:00
abstract::Alcoholic patients have a high incidence of hepatitis C virus (HCV) infection. Alcohol consumption enhances the severity of the HCV disease course and worsens the outcome of chronic hepatitis C. The accumulation of virally infected cells in the liver is related to the HCV-induced inability of the immune system to reco...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.15.1201
更新日期:2009-03-14 00:00:00
abstract:AIM:To evaluate the best diagnostic technique and risk factors of the human Cytomegalovirus (HCMV) and Epstein-Barr virus (EBV) infection in inflammatory bowel disease (IBD). METHODS:A cohort of 40 IBD patients (17 refractory) and 40 controls underwent peripheral blood and endoscopic colonic mucosal sample harvest. Vi...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i6.1915
更新日期:2015-02-14 00:00:00
abstract::Several receptors have been identified as implicated on viral entry into the hepatocyte; and, this interaction between the virus and potential receptors could modulate infection, spontaneous viral clearance, persistence of the infection and the widespread of the virus as outbreak. Nevertheless, the playing role of eac...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i33.4481
更新日期:2012-09-07 00:00:00
abstract:AIM:To evaluate whether intratumoral injection of liposome-endostatin complexes could enhance the antitumor efficacy of radiation therapy in human liver carcinoma (BEL7402) model. METHODS:Recombinant plasmid pcDNA3.End was transfected into human liver carcinoma cell line (BEL7402) with lipofectamine to produce conditi...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i28.4439
更新日期:2005-07-28 00:00:00
abstract:AIM:To investigate the immunogenicity of candidate DNA vaccine against hepatitis C virus (HCV) delivered by two plasmids expressing HCV envelope protein 1 (E1) and envelope protein 2 (E2) antigens respectively and to study the effect of CpG adjuvant on this candidate vaccine. METHODS:Recombinant plasmids expressing HC...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v10.i17.2488
更新日期:2004-09-01 00:00:00
abstract:AIM:To investigate the expression of tumor suppressor gene p27 and spindle checkpoint gene Mad2 and to demonstrate their expression difference in colorectal cancer and normal mucosa and to evaluate its clinical significance. METHODS:Immunohistochemical staining was used for detection of expression of Mad2 and p27 in c...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v10.i21.3218
更新日期:2004-11-01 00:00:00
abstract:AIM:To evaluate the diagnostic value of gadobenate dimeglumine (Gd-BOPTA)-enhanced hepatocyte-phase magnetic resonance imaging (MRI) in evaluating hepatic fibrosis and hepatitis. METHODS:Hepatocyte-phase images of Gd-BOPTA-enhanced MRI were retrospectively evaluated in 76 patients with chronic liver disease. These pat...
journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章
doi:10.3748/wjg.v23.i17.3133
更新日期:2017-05-07 00:00:00
abstract::Fibroblast growth factor receptors (FGFRs) regulate a variety of cellular functions, from embryogenesis to adult tissue homeostasis. FGFR signaling also plays significant roles in the proliferation, invasion, and survival of several types of tumor cells. FGFR-induced alterations, including gene amplification, chromoso...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i8.2415
更新日期:2016-02-28 00:00:00
abstract:AIM:To investigate the implication of the hypoxia inducible factor HIF-1alpha mRNA in gastric carcinoma and its relation to the expression of vascular endothelial growth factor (VEGF) protein, tumor angiogenesis invasion/metastasis and the patient's survival. METHODS:In situ hybridization was used to examine expressio...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i11.1680
更新日期:2007-03-21 00:00:00
abstract:INTRODUCTION:This paper provides a review of the practice of liver transplantation with the main emphasis on UK practice and indications for transplantation. REFERRAL AND ASSESSMENT:This section reviews the process of referral and assessment of patients with liver disease with reference to UK practice. DONOR ORGANS:T...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v7.i5.602
更新日期:2001-10-01 00:00:00
abstract:AIM:To investigate their expression and activity in the rat ileum after exposure to ionizing radiation along with that of the cellular effectors and molecular mediators involved in the regulation of MMPs. METHODS:Rats were exposed to a single 10-Gy dose of X-rays delivered to the abdomen. A combination of methods, suc...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i40.6312
更新日期:2005-10-28 00:00:00
abstract::Crohn's disease (CD) is a chronic inflammatory disease of the digestive tract with systemic manifestations. Etiology is unknown, even if immunological, genetic and environmental factors are involved. The majority of CD patients require surgery during their lifetime due to progressive bowel damage, but, even when all m...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v17.i27.3213
更新日期:2011-07-21 00:00:00
abstract::Hepatocellular carcinoma (HCC) is one of the most common and highly fatal malignancies worldwide. Chronic infection with hepatitis B virus (HBV) is a major cause of HCC. High HBV replication rate and related non-resolving inflammation are the major risk factors of HCC occurrence and postoperative recurrence. Early pro...
journal_title:World journal of gastroenterology
pub_type: 社论
doi:10.3748/wjg.v22.i29.6565
更新日期:2016-08-07 00:00:00
abstract::Helicobacter pylori (H. pylori) produce an enzyme known as γ-glutamyl transpeptidase (HpGGT) that is highly conserved and common to all strains. HpGGT has been gaining increasing attention as an important virulence factor of the bacterium, having been demonstrated to be an important colonization factor in several anim...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v19.i45.8203
更新日期:2013-12-07 00:00:00
abstract:AIM:To determine whether the expression profiles of EphB receptor and ephrin-B ligand can be used as markers for dysplastic/oncogenic transformation in gastric mucosa. METHODS:The protein expression and localization of EphB and ephrin-B in normal, ulcerated regenerating, and dysplastic gastric mucosa were examined in ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i2.453
更新日期:2015-01-14 00:00:00
abstract:AIM:To assess the cleansing efficacy and safety of a new Colon capsule endoscopy (CCE) bowel preparation regimen. METHODS:This was a multicenter, prospective, randomized, controlled study comparing two CCE regimens. Subjects were asymptomatic and average risk for colorectal cancer. The second generation CCE system (Pi...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.3748/wjg.v23.i48.8615
更新日期:2017-12-28 00:00:00
abstract::As among persons with normal anatomy, occasional patients with situs inversus develop malignant tumors. Recently, several laparoscopic operations have been reported in patients with situs inversus. We describe laparoscopic hemicolectomy with radical lymphadenectomy in such a patient. Careful consideration of the mirro...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i37.5035
更新日期:2007-10-07 00:00:00
abstract:AIM:To investigate Helicobacter pylori (H. pylori) eradication rates using second-line bismuth-containing quadruple therapy and to identify predictors of eradication failure. METHODS:This study included 636 patients who failed first-line triple therapy and received 7 d of bismuth-containing quadruple therapy between J...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v23.i6.1059
更新日期:2017-02-14 00:00:00
abstract:BACKGROUND:Esophagomediastinal fistula is a very rare complication of tuberculosis in otherwise healthy adults, and mediastinal bronchial artery aneurysm is even rarer. In this case report, we describe a rare case of tuberculosis complication that presented with acute upper gastrointestinal (GI) bleeding. It also highl...
journal_title:World journal of gastroenterology
pub_type:
doi:10.3748/wjg.v25.i17.2144
更新日期:2019-05-07 00:00:00
abstract:AIM:To evaluate the clinical usefulness of (18)F-fluorodeoxyglucose positron emission and computed tomography ((18)F-FDG PET/CT) in restaging of esophageal cancer after surgical resection and radiotherapy. METHODS:Between January 2007 and Aug 2008, twenty histopathologically diagnosed esophageal cancer patients underw...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.1836
更新日期:2009-04-21 00:00:00
abstract::Neuroendocrine carcinoma (NEC) of the extrahepatic bile duct is rare, and only 22 cases have been reported. Only two of these were large-cell NEC (LCNEC); the vast majority were small-cell NEC. Here, we report a third case of LCNEC of the extrahepatic bile duct. A 76-year-old male presented to a local hospital with pa...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v19.i28.4616
更新日期:2013-07-28 00:00:00