Abstract:
:AIM:To study the relationship between insulin A chain regions and insulin biological activities, we designed a series of insulin analogues with changes at A21, A12-18 of C terminal helical region and A8-10 located in the region of A6-A11 intra-chain disulphide bond.METHODS:Insulin A-chain analogues were prepared by stepwise Fmoc solid phase manual synthesis and then combined with natural B-chain of porcine insulin to yield corresponding insulin analogues. Their biological activities were tested by receptor binding, mouse convulsion and immunological assay.RESULTS: A21Ala Ins retains 70.3% receptor binding capacity and 60% in vivo biological activity.DesA13-14, A21Ala Ins and DesA12-13-14-15, A21Ala Ins still have definite biological activity,7.9% and 4.0% receptor binding,and 6.2% and 3.3% in vivo biological activity respectively. A15Asn, A17Pro, A21Ala Ins maintains 10.4% receptor binding and 10% in vivo biological activity. A8His, A9Arg, A10Pro, A21Ala Ins, A8His, A9Lys, A10Pro, A21Ala Ins and A8His, A9Lys, A10Arg, A21Ala Ins have 51.9%, 44.3% and 32.1% receptor binding respectively,50%, 40% and 30% in vivo biological activity respectively, and 28.8%, 29.6% and 15.4% immunological activity respectively.CONCLUSION:A21Asn can be replaced by simple amino acid residues.The A chains with gradually damaged structural integrity in A12-18 helical region and the demolition of the A12-18 helical region by the substitution of Pro and Asn for A17Glu and A15Gln respectively can combine with the B chain and the combination products show definite biological activity, the helical structure of A12-18 is essential for biological activities of insulin. A8-10 is not much concerned with biological activities, but is much more important antigenically in binding to its antibodies, these results may help us design a new type of insulin analogue molecule.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Yang SZ,Huang YD,Jie XF,Feng YM,Niu JYdoi
10.3748/wjg.v6.i3.371keywords:
subject
Has Abstractpub_date
2000-06-01 00:00:00pages
371-373issue
3eissn
1007-9327issn
2219-2840journal_volume
6pub_type
杂志文章abstract::In a recently published letter to the editor, we debated the proposal by Coccolini et al to treat gastrointestinal stromal tumors (GISTs) of the esophagogastric junction with enucleation and, if indicated, adjuvant therapy. We highlighted that, because the prognostic impact of a T1 high-mitotic rate esophageal GIST is...
journal_title:World journal of gastroenterology
pub_type: 评论,信件
doi:10.3748/wjg.v19.i12.2009
更新日期:2013-03-28 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::Reduction of low-density lipoprotein-cholesterol through statin therapy has only modestly decreased coronary heart disease (CHD)-associated mortality in developed countries, which has prompted the search for alternative therapeutic strategies for CHD. Major efforts are now focused on therapies that augment high-densit...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v16.i47.5946
更新日期:2010-12-21 00:00:00
abstract:AIM:To clarify the molecular mechanism involved in pathogenesis of colorectal cancer as well as clinical significance of genetic analysis of histological samples. METHODS:A total of 480 blood and tissue specimens were collected in our hospital from January 2011 to October 2012. In the observation group, there were 120...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i48.18338
更新日期:2014-12-28 00:00:00
abstract::The annual incidence of adenocarcinoma arising from Barrett's esophagus (BE) is approximately 0.5%. Through a process of gradual transformation from low-grade dysplasia to high-grade dysplasia (HGD), adenocarcinoma can develop in the setting of BE. The clinical importance of appropriate identification and treatment of...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v16.i30.3780
更新日期:2010-08-14 00:00:00
abstract::Laparoscopic cholecystectomy (LC) does not require advanced techniques, and its performance has therefore rapidly spread worldwide. However, the rate of biliary injuries has not decreased. The concept of the critical view of safety (CVS) was first documented two decades ago. Unexpected injuries are principally due to ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i47.10287
更新日期:2016-12-21 00:00:00
abstract:AIM:To investigate the effects of early enteral nutrition (EEN) on the immune function and clinical outcome of patients with severe acute pancreatitis (SAP). METHODS:Patients were randomly allocated to receive EEN or delayed enteral nutrition (DEN). Enteral nutrition was started within 48 h after admission in EEN grou...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,随机对照试验
doi:10.3748/wjg.v19.i6.917
更新日期:2013-02-14 00:00:00
abstract::Nestin is a class VI intermediate filament protein that was originally described as a neuronal stem cell marker during central nervous system (CNS) development, and is currently widely used in that capacity. Nestin is also expressed in non-neuronal immature or progenitor cells in normal tissues. Under pathological con...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v17.i4.409
更新日期:2011-01-28 00:00:00
abstract:AIM:To investigate the causes of missed diagnosis of early gastric cancer (EGC) or high-grade intraepithelial neoplasia (HGIN) in Chongqing, China. METHODS:The present study summarizes 103 cases of EGC/HGIN detected by esophagogastroduodenoscopy (EGD) and pathological analysis from January 2010 to December 2011. Dimet...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i13.2092
更新日期:2013-04-07 00:00:00
abstract:AIM:To further investigate the role of human B7 homolog 1 (B7-H1) in the mechanism of persistent hepatitis B virus (HBV) infection. METHODS:Peripheral and intra-hepatic B7-H1 expression were compared by flow cytometry and immunochemical staining between two 2 distinct groups, one being chronic HBV tolerance patients (C...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i28.3681
更新日期:2012-07-28 00:00:00
abstract::Gastric cancer and liver cancer are among the most common malignancies and the leading causes of death worldwide, due to late detection and high recurrence rates. Today, these cancers have a heavy socioeconomic burden, for which a full understanding of their pathophysiological features is warranted to search for promi...
journal_title:World journal of gastroenterology
pub_type: 社论,评审
doi:10.3748/wjg.v18.i30.3923
更新日期:2012-08-14 00:00:00
abstract:AIM:To perform a meta-analysis of observational studies to further elucidate the relationship between oral bisphosphonate use and gastrointestinal cancer risk. METHODS:Systematic literature search was conducted in MEDLINE, EMBASE, and the Cochrane Library to identify studies through January 2011. Search terms were "bi...
journal_title:World journal of gastroenterology
pub_type: 杂志文章,meta分析,评审
doi:10.3748/wjg.v18.i40.5779
更新日期:2012-10-28 00:00:00
abstract:AIM:To assess intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI) for monitoring early efficacy of chemotherapy in a human gastric cancer mouse model. METHODS:IVIM-DWI was performed with 12 b-values (0-800 s/mm(2)) in 25 human gastric cancer-bearing nude mice at baseline (day 0), and then they were rand...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v22.i24.5520
更新日期:2016-06-28 00:00:00
abstract:AIM:To investigate the effects of Terminalia arjuna (T. arjuna) extract on human hepatoma cell line (HepG2) and its possible role in induction of apoptosis. METHODS:Human hepatoma cells were treated with different concentrations of ethanolic extract of T. arjuna and its cytotoxicity effect was measured by trypan blue ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i7.1018
更新日期:2006-02-21 00:00:00
abstract::Benign neoplasia of the duodenum are very rare. Moreover, duodenal tubulovillous adenomas are more uncommon lesions. The microscopic structure of tubulovillous adenoma has frond-like projection of mucosa with branching papillary structure and generally upward growth into the lumen. We describe a 72-year-old man who sh...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i23.3262
更新日期:2007-06-21 00:00:00
abstract:AIM:To investigate the association between interleukin-28B (IL28B) genotype and response to treatment and hepatic fibrosis in patients with hepatitis C virus (HCV) genotype 4. METHODS:Two hundred and one HCV-genotype 4 patients were included. All patients were treated with Peginterferon alph2a/Ribavirin for 48 wk. End...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i47.7003
更新日期:2012-12-21 00:00:00
abstract:AIM:To investigate the influence of experimental obstructive jaundice and exogenous bombesin (BBS) and neurotensin (NT) administration on the expression of the tight junction (TJ)-protein claudin-4 in intestinal epithelium of rats. METHODS:Forty male Wistar rats were randomly divided into five groups: I = controls, II...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i21.3410
更新日期:2006-06-07 00:00:00
abstract:BACKGROUND:Anti-tumor necrosis factor α (TNFα) represents the best therapeutic option to induce mucosal healing and clinical remission in patients with moderate-severe ulcerative colitis. On the other side gut microbiota plays a crucial role in pathogenesis of ulcerative colitis but few information exists on how microb...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v25.i12.1465
更新日期:2019-03-28 00:00:00
abstract:AIM:To investigate the prevalence of erectile dysfunction (ED) and its association with depression in patients with chronic viral hepatitis. METHODS:This single center cross-sectional study was conducted from August 2013 through January 2014. All outpatients with chronic viral hepatitis in our liver clinic between 18 ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i18.5641
更新日期:2015-05-14 00:00:00
abstract:AIM:To investigate the effects of herbal compound 861 (Cpd 861) on cell proliferation in human hepatic stellate cells (LX-2) and human hepatocellular liver carcinoma cells (HepG2), and expression of alpha-smooth muscle actin (alpha-SMA) in LX-2 cells. METHODS:LX-2 and HepG2 cells were incubated with various concentrat...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v10.i19.2831
更新日期:2004-10-01 00:00:00
abstract:AIM:To investigate the role of pre-core and basal core promoter (BCP) mutations before and after hepatitis B e antigen (HBeAg) seroconversion. METHODS:The proportion of pre-core (G1896A) and basal core promoter (A1762T and G1764A) mutant viruses and serum levels of hepatitis B virus (HBV) DNA, hepatitis B surface anti...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i2.541
更新日期:2015-01-14 00:00:00
abstract:AIM:To evaluate the efficacy of stents in treating patients with anastomotic site obstructions due to cancer recurrence following colorectal surgery. METHODS:The medical records of patients who underwent endoscopic self-expanding metal stents (SEMS) insertion for colorectal obstructions between February 2004 and Janua...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i38.13936
更新日期:2014-10-14 00:00:00
abstract:AIM:To investigate the level of gastric ghrelin in stomach mucosa of dyspeptic patients in relation to Helicobacter pylori (H pylori) infection, bacterial cytotoxicity, topography and gender. METHODS:The study comprised 40 premenopausal women (19 H pylori positive) and 48 men (17 H pylori positive) with functional dys...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.5409
更新日期:2009-11-21 00:00:00
abstract:AIM:To accurately and realistically elucidate human stem cell behaviors in vivo and the fundamental mechanisms controlling human stem cell fates in vivo, which is urgently required in regenerative medicine and treatments for some human diseases, a surrogate human-rat chimera model was developed. METHODS:Human-rat chim...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i19.2707
更新日期:2007-05-21 00:00:00
abstract:AIM:To investigate the rate of Helicobacter pylori (H. pylori) resistance to clarithromycin among ethnic minority patients in Guangxi, explore the underlying mechanisms, and analyze factors influencing genotype distribution of H. pylori isolates. METHODS:H. pylori strains were isolated, cultured and subjected to drug ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i16.4761
更新日期:2014-04-28 00:00:00
abstract::A 41-year-old man with a continuous-flow left ventricular assist device presented for evaluation of dysphagia and dark urine. He was found to have a significantly elevated L-lactate dehydrogenase and an elevated plasma free hemoglobin consistent with intravascular hemolysis. After the hemolysis ceased, both the black ...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v21.i18.5735
更新日期:2015-05-14 00:00:00
abstract:AIM:To prospectively investigate the detection rate of laterally spreading tumors (LSTs) of the colorectum by computed tomography (CT) colonography (CTC). METHODS:Patients with LSTs measuring ≥ 20 mm detected during colonoscopy were prospectively enrolled in the study. All patients underwent colonoscopy and subsequent...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v20.i46.17552
更新日期:2014-12-14 00:00:00
abstract:AIM:To investigate the effect of pituitary homeobox 1 (PITX1) expression in cases of human gastric cancer on cancer differentiation and progression, and carcinogenesis. METHODS:Using polyclonal PITX1 antibodies, we studied the expression of PITX1 in normal gastric mucosa, atypical hyperplasia, intestinal metaplasia, a...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.14.292
更新日期:2008-01-14 00:00:00
abstract:AIM:To investigate the genetic relationship between Hirschsprung's disease (HD) and intestinal neuronal dysplasia (IND) in Chinese population. METHODS:Peripheral blood samples were obtained from 30 HD patients, 20 IND patients, 18 HD/IND combined patients and 20 normal individuals as control. Genomic DNA was extracted...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v12.i7.1136
更新日期:2006-02-21 00:00:00
abstract:AIM:To determine the pattern and distribution of colonic diverticulosis in Thai adults. METHODS:A review of the computerized radiology database for double contrast barium enema (DCBE) in Thai adults was performed at the Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. Incomplete studies and...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i46.8709
更新日期:2013-12-14 00:00:00