Abstract:
AIM:To clone and express the antigen of monoclonal antibody (MAb) PD4 for further investigation of its function. METHODS:MGC803 cDNA expression library was constructed and screened with PD4 as probes to clone the antigen. After failed in the library screening, immunoprecipitation and SDS-polyacrylamide gel electrophoresis were applied to purify the antigen for sequence analysis. The antigen coming from Mycoplasma hyorhinis (M. hyorhinis) was further confirmed with Western blot analysis by infecting M. hyorhinis -free HeLa cells and eliminating the M. hyorhinis from MGC803 cells. The full p37 gene was cloned by PCR and expressed successfully in Escherichia coli after site-directed mutations. Immunofluorescence assay was used to demonstrate if p37 protein could directly bind to gastric tumor cell AGS. RESULTS:The cDNA library constructed with MGC803 cells was screened by MAb PD4 as probes. Unfortunately, the positive clones identified with MAb PD4 were also reacted with unrelated antibodies. Then, immunoprecipitation was performed and the purified antigen was identified to be a membrane protein of Mycoplasma hyorhinis (M. hyorhinis) by sequencing of N-terminal amino acid residues. The membrane protein was intensively verified with Western blot by eliminating M. hyorhinis from MGC803 cells and by infecting M. hyorhinis-free HeLa cells. The full p37 gene was cloned and expressed successfully in Escherichia coli after site-directed mutations. Immunofluorescence demonstrated that p37 protein could directly bind to gastric tumor cell AGS. CONCLUSION:The antigen recognized by MAb PD4 is from M. hyorhinis, which suggests the actions involved in MAb PD4 is possibly mediated by p37 protein or M. hyorhinis. As p37 protein can bind directly to tumor cells, the pathogenic role of p37 involved in tumorigenesis justifies further investigation.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Ning JY,Sun GX,Huang S,Ma H,An P,Meng L,Song SM,Wu J,Shou CCdoi
10.3748/wjg.v9.i10.2164keywords:
subject
Has Abstractpub_date
2003-10-01 00:00:00pages
2164-8issue
10eissn
1007-9327issn
2219-2840journal_volume
9pub_type
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i2.331
更新日期:2006-01-14 00:00:00
abstract::A liver tumor 35 mm in diameter was found incidentally in a 40-year-old woman who had no history of liver diseases or the use of oral contraceptives. Radiological diagnostics showed the typical findings of liver cell adenoma (LCA). Dynamic computed tomography revealed that the tumor showed a homogenous enhancement in ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.1267
更新日期:2009-03-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v16.i16.1939
更新日期:2010-04-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i26.4224
更新日期:2006-07-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.5717
更新日期:2008-10-07 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.871
更新日期:2009-02-21 00:00:00
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journal_title:World journal of gastroenterology
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更新日期:2012-06-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章
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更新日期:2005-10-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v11.i35.5480
更新日期:2005-09-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i32.11340
更新日期:2014-08-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v21.i23.7313
更新日期:2015-06-21 00:00:00
abstract::Alterations of normal function of interstitial cells of Cajal (ICC) are reported in many intestinal disorders. Diagnosis of their involvement is rare (infrequent), but necessary to propose a specific treatment. This article reviews the place of ICC in the pathogenesis of achalasia, gastroesophageal reflux disease, inf...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
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更新日期:2008-11-07 00:00:00
abstract:AIM:To identify the predictive clinicopathological factors for lymph node metastasis (LNM) in poorly differentiated early gastric cancer (EGC) and to further expand the possibility of using endoscopic mucosal resection (EMR) for the treatment of poorly differentiated EGC. METHODS:Data were collected from 85 poorly-dif...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.4222
更新日期:2008-07-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,meta分析,评审
doi:10.3748/wjg.v20.i40.14986
更新日期:2014-10-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v20.i24.7819
更新日期:2014-06-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i15.1765
更新日期:2012-04-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.5960
更新日期:2009-12-21 00:00:00
abstract:AIM:To investigate the prevalence of hepatitis G virus (HGV) infection and to analyse the homology of different HGV strains in Southern China. METHODS:A total of 1993 sera from different groups in Guangdong, Hong Kong, and Yunnan were detected by reverse transcription polymerase chain reaction (RT-PCR). The nucleotide...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v8.i6.1081
更新日期:2002-12-01 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i22.7067
更新日期:2014-06-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v4.i2.109
更新日期:1998-04-01 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 信件
doi:10.3748/wjg.v18.i26.3477
更新日期:2012-07-14 00:00:00
abstract:BACKGROUND:Acute liver failure (ALF) is a significant and complex hepatic insult that may rapidly progress to life-threatening conditions. Recently, menstrual blood stem cells (MenSCs) have been identified as a group of easily accessible mesenchymal stem cells with the advantages of non-invasive acquisition, low immuno...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v25.i41.6190
更新日期:2019-11-07 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i43.12430
更新日期:2015-11-21 00:00:00
abstract::Autoimmune pancreatitis has emerged over the last 40 years from a proposed concept to a well established and recognized entity. As an efficient mimicker of pancreatic carcinoma, its early and appropriate recognition are crucial. With mounting understanding of its pathogenesis and natural history, significant advances ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v13.i47.6327
更新日期:2007-12-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 社论,meta分析
doi:10.3748/wjg.14.1313
更新日期:2008-03-07 00:00:00
abstract::The liver is the commonest site of distant metastasis of colorectal cancer and nearly half of the patients with colorectal cancer ultimately develop liver involved during the course of their diseases. Surgery is the only therapy that offers the possibility of cure for patients with hepatic metastatic diseases. Five-ye...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v9.i2.193
更新日期:2003-02-01 00:00:00
abstract:AIM:To evaluate of scoring system in predicting choledocholithiasis in selective intraoperative cholangiography (IOC) during laparoscopic cholecystectomy (LC). METHODS:The scoring system of predicting choledocholithiasis was developed during the retrospective study in 264 cases, and was tested in 184 to evaluate its p...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v9.i4.865
更新日期:2003-04-01 00:00:00
abstract:AIM:To evaluate the association between HLA-DRB1 alleles and Han and Uyghur ulcerative colitis (UC) patients residing in the Xinjiang Uyghur Autonomous Region of China. METHODS:In this study, 102 UC patients (53 Han including 22 men and 31 women, and 49 Uyghur patients including 25 men and 24 women; aged 48.07 ± 15.83...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i17.2709
更新日期:2013-05-07 00:00:00
abstract::Multiple pathogenic mechanisms have been implicated in autoimmune hepatitis, but they have not fully explained susceptibility, triggering events, and maintenance or escalation of the disease. Furthermore, they have not identified a critical defect that can be targeted. The goals of this review are to examine the diver...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v25.i45.6579
更新日期:2019-12-07 00:00:00
abstract:AIM:To investigate long-term outcome in obscure gastrointestinal bleeding (OGIB) after negative capsule endoscopy (CE) and identify risk factors for rebleeding. METHODS:A total of 113 consecutive patients underwent CE for OGIB from May 2003 to June 2010 at Seoul National University Hospital. Ninety-five patients (84.1...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i10.1632
更新日期:2013-03-14 00:00:00