Abstract:
AIM:We shall construct the small interfering RNA (siRNA) expression cassette (SEC) targeting activated K-ras gene sequence, identify more effective siRNA sequence against K-ras gene in human pancreatic cancer cell line MiaPaCa-2 by SEC and reveal the anti-cancer effects of RNA interference (RNAi) and its therapeutic possibilities. METHODS:Three different sites of SECs were constructed by PCR. K1/siRNA, K2/siRNA and K3/siRNA are located at sites 194, 491 and 327, respectively. They were transfected into MiaPaCa-2 cells by liposome to inhibit the expression of activated K-ras. In the interfering groups of sites 194 and 491, we detected the apoptosis in cells by FACS after they were incubated for 48 h, then we tested the alternation of K-ras gene in MiaPaCa-2 cells by RT-PCR immunofluorescence, respectively. RESULTS:Introduction of the K1/siRNA and K2/siRNA against K-ras into MiaPaCa-2 cells leads to increased apoptosis, and the number of apoptotic cells is increased compared with control cells. The tests of RT-PCR immunofluorescence show the effects of inhibiting expression of activated K-ras gene by RNA interference in the K1/siRNA and K2/siRNA groups. We also find that the introduction of K3/siRNA has no effect on MiaPaCa-2 cells. CONCLUSION:K1/siRNA and K2/siRNA can inhibit the expression of activated K-ras but K3/siRNA has no effect, demonstrating that K1/siRNA and K2/siRNA are effective sequences against K-ras gene and K3/siRNA are not. We conclude that specific siRNA against K-ras expression may be a powerful tool to be used therapeutically against human pancreatic cancer.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Wang W,Wang CY,Dong JH,Chen X,Zhang M,Zhao Gdoi
10.3748/wjg.v11.i13.2026keywords:
subject
Has Abstractpub_date
2005-04-07 00:00:00pages
2026-31issue
13eissn
1007-9327issn
2219-2840journal_volume
11pub_type
杂志文章abstract::Single-incision laparoscopic surgery (SILS) and natural orifice transluminal endoscopic surgery (NOTES) have rapidly gained pace worldwide, potentially replacing conventional laparoscopic surgery (CLS) as the preferred colorectal surgery technique. Currently available data mainly consist of retrospective series analyz...
journal_title:World journal of gastroenterology
pub_type: 历史文章,杂志文章,评审
doi:10.3748/wjg.v20.i48.18104
更新日期:2014-12-28 00:00:00
abstract:AIM:To determine the immune-modulatory and the hepatoprotective effects of oral administration of two soy extracts in immune mediated liver injury and non-alcoholic steatohepatitis (NASH). METHODS:Two soy extracts, M1 and OS, were orally administered to mice with concanavalin A (ConA) immune-mediated hepatitis, to hig...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i24.7443
更新日期:2015-06-28 00:00:00
abstract:AIM:To observe the kinetics of D (-)-lactate alteration in both portal and systemic circulation systems, and its relationship with intestinal injury in rats subjected to acute intestinal ischemia-reperfusion. METHODS:Anesthetized rats underwent a 75-min superior mesenteric artery occlusion followed by a 6-h reperfusio...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v3.i4.225
更新日期:1997-12-15 00:00:00
abstract:BACKGROUND:Although previous studies have confirmed the feasibility of magnetic compression anastomosis (MCA), there is still a risk of long-term anastomotic stenosis. For traditional MCA devices, a large device is associated with great pressure, and eventually increased leakage. AIM:To develop a novel MCA device to s...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v26.i42.6614
更新日期:2020-11-14 00:00:00
abstract:AIM:To determine the expression of toll-like receptor 9 (TLR9) in pancreatic tumor and the effects of cytosine phosphate-guanosine oligodeoxynucleotides 2216 (CPG ODN2216) on biological behavior of pancreatic carcinoma cell line PANC-1 and explore their clinical significance. METHODS:The immunohistochemistry and Weste...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v17.i8.996
更新日期:2011-02-28 00:00:00
abstract:AIM:To investigate the relationship of serum levels of polyunsaturated fatty acid (PUFA) with kinds of cytokines in colorectal cancer (CRC). METHODS:Serum samples of 100 CRC patients were collected. The concentration of total n-3 PUFA which included C18:3 n-3, C20:5 n-3, C22:5 n-3, C22:6 n-3 and the total n-6 PUFA inc...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v22.i8.2524
更新日期:2016-02-28 00:00:00
abstract:AIM:H101, an E1B 55 kD gene deleted adenovirus, has been shown to possess oncolysis activity experimentally and proved to be safe in preliminary phase I study. The current study was designed to evaluate its anti-tumor activity and toxicity in combination with chemotherapy in patients with late stage cancers. METHODS:H...
journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章
doi:10.3748/wjg.v10.i24.3634
更新日期:2004-12-15 00:00:00
abstract::Microsatellite instability (MSI) is a prognostic factor and a marker of deficient mismatch repair (MMR) in colorectal adenocarcinomas (CRC). However, a proper application of this marker requires understanding the following: (1) The MSI concept: The PCR approach must amplify the correct locus and accurately identify th...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v12.i37.5932
更新日期:2006-10-07 00:00:00
abstract:AIM:To describe a three-dimensional model (3DM) to accurately reconstruct anatomic relationships of centrally located hepatocellular carcinomas (HCCs). METHODS:From March 2013 to July 2014, reconstructions and visual simulations of centrally located HCCs were performed in 39 patients using a 3D subject-based computed ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i15.4607
更新日期:2015-04-21 00:00:00
abstract:AIM:To investigate the expression frequency of endocan in colorectal cancer and analyze the relationship between endocan expression and clinical parameters and to study the role of endocan in colorectal carcinogenesis. METHODS:Expression of endocan in 72 tumor tissue samples of colorectal cancer as well as in 27 norma...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.4562
更新日期:2008-07-28 00:00:00
abstract::It has been reported that host defense responses, such as phagocytic function of neutrophils and natural killer (NK) cell activity of lymphocytes, are impaired in cirrhotic patients. This review will concentrate on the impairment of innate immune responses in decompensated cirrhotic patients and the effect of the trea...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v20.i23.7298
更新日期:2014-06-21 00:00:00
abstract:AIM:To evaluate the inhibition effect of HCV NS5A on p53 transactivation on p21 promoter and explore its possible mechanism for influencing p53 function. METHODS:p53 function of transactivation on p21 promoter was studied with a luciferase reporter system in which the luciferase gene is driven by p21 promoter, and the...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v10.i15.2223
更新日期:2004-08-01 00:00:00
abstract:AIM:To evaluate the association of pre-treatment (13)C-urea breath test (UBT) results with H pylori density and efficacy of eradication therapy in patients with active duodenal ulcers. METHODS:One hundred and seventeen consecutive outpatients with active duodenal ulcer and H pylori infection were recruited. H pylori d...
journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章
doi:10.3748/wjg.v10.i7.991
更新日期:2004-04-01 00:00:00
abstract:AIM:To investigate the proportion of patients with moderate-severe erosive esophagitis (EE) who will have Barrett's esophagus (BE) after healing of inflammation. METHODS:Patients with EE of Los Angeles (LA) class B, C and D who underwent follow-up endoscopy documenting complete mucosal healing. RESULTS:A total of 86/...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.3518
更新日期:2008-06-14 00:00:00
abstract::We report a case of a patient presenting with clinical, radiological and endoscopic features of colitis due to a compressive left para-aortic mass. Total open surgical excision was performed, which resulted in complete resolution of colitis. Histopathology and immunohistochemistry revealed benign retroperitoneal schwa...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i41.5521
更新日期:2007-11-07 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
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::Two major types of cancer occur in the esophagus: squamous cell carcinoma, which is associated with chronic smoking and alcohol consumption, and adenocarcinoma, which typically arises in gastric reflux-associated Barrett's esophagus. Although there is increasing incidence of esophageal adenocarcinoma in Western counti...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i7.2284
更新日期:2016-02-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i31.10960
更新日期:2014-08-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v6.i5.659
更新日期:2000-10-01 00:00:00
abstract:AIM:To assess the clinical outcomes of pre-, pro- and synbiotics therapy in patients with acute pancreatitis. METHODS:The databases including Medline, Embase, the Cochrane Library, Web of Science and Chinese Biomedicine Database were searched for all relevant randomized controlled trials that studied the effects of pr...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,meta分析
doi:10.3748/wjg.v16.i31.3970
更新日期:2010-08-21 00:00:00
abstract::AIM:To construct Hsp90 antisense RNA eukaryotic expression vector, transfect it into SGC7901 and SGC7901/VCR of MDR-type human gastric cancer cell lines, HCC7402 of human hepatic cancer and Ec109 of human esophageal cancer cell lines, and to study the cell cycle distribution of the gene transected cells and their resp...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v5.i3.199
更新日期:1999-06-01 00:00:00
abstract:AIM:To establish a new, reliable vomit model of minks. METHODS:Adult male minks were randomly divided into 8 groups (n=6): cisplatin (7.5 mg/kg) intraperitoneal injection (i.p.) group, copper sulfate (40 mg/kg) intragastric injection (i.g.) group, apomorphine (1.6 mg/kg) subcutaneous injection (s.c.) group, and 18 Gy ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i8.1300
更新日期:2006-02-28 00:00:00
abstract::Two-dimensional shear wave elastography (2D-SWE) is a rapid, simple and novel noninvasive method that has been proposed for assessing hepatic fibrosis in patients with chronic liver diseases (CLDs) based on measurements of liver stiffness. 2D-SWE can be performed easily at the bedside or in an outpatient clinic and yi...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v24.i9.957
更新日期:2018-03-07 00:00:00
abstract:AIM:To investigate the relationship between exercise-provoked esophageal motility disorders and the prognosis for patients with chest pain. METHODS:The study involved 63 subjects with recurrent angina-like chest pain non-responsive to empirical therapy with proton pump inhibitor (PPI). In all, a coronary artery angiog...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v16.i35.4428
更新日期:2010-09-21 00:00:00
abstract::Non-alcoholic fatty liver disease (NAFLD) is characterized by excessive storage of fatty acids in the form of triglycerides in hepatocytes. It is most prevalent in western countries and includes a wide range of clinical and histopathological findings, namely from simple steatosis to steatohepatitis and fibrosis, which...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v26.i17.1993
更新日期:2020-05-07 00:00:00
abstract:AIM:To study the inhibitory effects of a Shuangling Fuzheng anticancer preparation (SFAP) on the human gastric cancer cell line SGC-7901 in vitro as well as its immune-modulated effects in a cyclophosphamide-treated murine model. METHODS:MTT experiments and immunocytochemistry ABC experiments were performed for detect...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i48.6575
更新日期:2007-12-28 00:00:00
abstract::Colorectal cancer (CRC) represents one of the leading causes of tumor-related deaths worldwide. Among the various tools at physicians' disposal for the diagnostic management of the disease, tomographic imaging (e.g., CT, MRI, and hybrid PET imaging) is considered essential. The qualitative and subjective evaluation of...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v25.i35.5233
更新日期:2019-09-21 00:00:00
abstract:AIM:To globally compare the gene expression profiles during the capillary morphogenesis of human microvascular endothelial cells (HMVECs) in an in vitro angiogenesis system with affymetrix oligonucleotide array. METHODS:A microcarrier-based in vitro angiogenesis system was developed, in which ECs migrated into the mat...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i15.2283
更新日期:2005-04-21 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