Abstract:
BACKGROUND:Oxidative stress (OS) plays an important role in the progression of chronic liver disease and hepatocarcinogenesis. However, the role of OS in the progression of hepatocellular carcinoma (HCC) is unclear. The aim of this study was to assess whether OS promotes angiogenesis in HCC. METHODS:The expressions of vascular endothelial growth factor (VEGF), VEGF receptor2 (VEGFR2), and phosphorylated Akt were assessed, and microvessel density (MVD) and the cancer-associated fibroblast (CAF) population were examined by immunohistological staining in 55 HCC samples. The OS level in these tissues was assessed using 8-hydroxy-2'-deoxyguanosine (8-OHdG) and 4-hydroxy-2-nonenal (4-HNE) immunostaining, and an 8-OHdG enzyme-linked immunosorbent assay (ELISA). The expression and activation of angiogenic factors and the effect of growth stimulation of human umbilical vein endothelial cells (HUVECs) were also assessed in vitro, using HLE hepatoma-derived cells and conditioned medium with or without treatment with hydrogen peroxide (H₂O₂); a phosphoinositide 3-kinase (PI3K) inhibitor, wortmannin; and an anti-oxidative agent, N-acetyl-L-cysteine (NAC). RESULTS:A higher OS grade was significantly associated with higher MVD, VEGF expression, Akt activity, and OS grade of CAFs, but not with the percentage of the CAF population in HCC tissues. Additionally, cancer cells constituted a major population of OS marker-positive cells in HCC tissues. In vitro, H₂O₂ treatment induced up-regulation of VEGF at both the mRNA and protein levels, activated Akt, and resulted in the proliferation of HUVECs; the addition of wortmannin and NAC counteracted the effects of OS. CONCLUSIONS:OS enhances the malignant potential of HCC through the stimulation of angiogenesis by activation of the Akt-VEGF pathway.
journal_name
J Gastroenteroljournal_title
Journal of gastroenterologyauthors
Jo M,Nishikawa T,Nakajima T,Okada Y,Yamaguchi K,Mitsuyoshi H,Yasui K,Minami M,Iwai M,Kagawa K,Itoh Y,Yoshikawa Tdoi
10.1007/s00535-011-0392-zsubject
Has Abstractpub_date
2011-06-01 00:00:00pages
809-21issue
6eissn
0944-1174issn
1435-5922journal_volume
46pub_type
杂志文章abstract:BACKGROUND:There have been few reports on hepatocellular carcinoma (HCC) in nonalcoholic steatohepatitis (NASH) and the natural history of NASH. Accordingly, we assessed the clinical features of HCC in NASH, the risk factors for HCC, and natural history of NASH with advanced fibrosis. PATIENTS AND METHODS:There were 3...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s00535-008-2262-x
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND:The levels of serum HER2 extracellular domain (ECD) are highly correlated with tissue HER2 status in metastatic gastric cancer (AGC). We sought to explore whether serum HER2 ECD could predict the efficacy of trastuzumab-treated HER2-positive AGC. MATERIALS AND METHODS:From 2011 to 2013, trastuzumab-treated ...
journal_title:Journal of gastroenterology
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doi:10.1007/s00535-015-1046-3
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abstract:BACKGROUND:Most studies evaluating visceral sensation measure visceromotor response (VMR) to colorectal distention (CRD). However, CRD itself induces visceral sensitization, and little is known about the detailed characteristics of this response. The present study tried to clarify this question. METHODS:VMR was determ...
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abstract:BACKGROUND:We carried out this study to evaluate recent clinical features of Wilson's disease (WD) with hepatic presentation, especially in terms of age, degree of liver injury, and association with hepatocellular carcinoma (HCC). METHODS:Sixteen patients with hepatic manifestations were diagnosed with WD in the perio...
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doi:10.1007/s00535-004-1466-y
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abstract:BACKGROUND:In the respiratory mucosa, interleukin (IL)-33, has been shown to enhance T helper 2 (TH2)-type responses through the master regulatory gene GATA-3. IL-33 is upregulated in ulcerative colitis (UC), and the aim was to assess if IL-33 holds a similar key position in the shaping of the immune response in experi...
journal_title:Journal of gastroenterology
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doi:10.1007/s00535-014-0982-7
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abstract::We reviewed articles on the epidemiology and clinical characteristics of gastroesophageal reflux disease (GERD) in Japan to clarify these features of GERD in this country. Although the definition of GERD depends on the individual study, the prevalence of GERD has been increasing since the end of the 1990s. The reasons...
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abstract::Accumulating data from animal models indicate that Inflammatory bowel disease (IBD) is mediated by a much more complicated mechanism than previously predicted. For example, the role of an individual molecule in the pathogenesis of IBD distinctly differs depending on several factors, including the fundamental mechanism...
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doi:10.1007/s00535-007-2111-3
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abstract:BACKGROUND:Only a few studies have longitudinally evaluated whether fatty pancreas increases the risk of type-2 diabetes (T2D), and their results were inconsistent. Fatty pancreas is closely linked to overweight and obesity, but previous studies did not exclude overweight or obese individuals. Therefore, in this cohort...
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pub_type: 杂志文章,meta分析,评审
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abstract::CYFRA 21-1 is a fragment of cytokeratin 19 (CK 19). Four patients with large intrahepatic (or peripheral) cholangiocarcinoma (CC) and high serum levels of CYFRA 21-1 (normal, < or = 2 ng/ml) are reported. CYFRA 21-1 levels exceeded 9 ng/ml in all 4 patients. Carcinoembryonic antigen (CEA), was high in 1 (CEA; normal r...
journal_title:Journal of gastroenterology
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doi:10.1007/s005350050112
更新日期:1998-06-01 00:00:00
abstract::The purpose of the present study was to elucidate the effect of hepatic reflow following ischemia on the remnant liver after hepatectomy with occluded hepatic blood inflow in dogs with obstructive jaundice. When 40% hepatectomy was performed with 10-min occlusion of hepatic blood inflow in dogs with obstructive jaundi...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/BF02355028
更新日期:1996-06-01 00:00:00
abstract::A retrospective long-term endoscopic follow-up study was designed to examine atrophic changes in the gastric mucosa over time in Helicobacter pylori-positive patients. Over a period of 8-17 years (mean, 13.4 years) 22 subjects (5 men, 17 women, mean age, 55 years) without localized gastroduodenal lesions underwent ser...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/BF01213291
更新日期:1997-02-01 00:00:00
abstract:BACKGROUND:The aim of this study was to examine the factors correlated with the progression of ribavirin-induced hemolytic anemia in patients with chronic hepatitis C treated by interferon and ribavirin combination therapy. METHODS:This study was conducted on 505 patients by the Osaka Liver Disease Study Group. A decl...
journal_title:Journal of gastroenterology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00535-006-1858-2
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND:Endoscopic transpapillary brush cytology and forceps biopsy are widely used for the pathological diagnosis of suspected malignant biliary strictures (MBS). However, the sensitivity of these methods remains insufficient, and it can be difficult to confirm the diagnosis. We aimed to evaluate the diagnostic abi...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s00535-011-0404-z
更新日期:2011-07-01 00:00:00
abstract::This study aimed to investigate sex differences in relation to hepatitis B e antigen (HBeAg) and serum alanine aminotransferase (ALT) levels in chronic asymptomatic hepatitis B virus (HBV) infection. HBeAg and ALT level were determined in 636 asymptomatic hepatitis B surface antigen carriers. There was no significant ...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s005350070048
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:A combination of hepatitis B immunoglobulin and nucleos(t)ide analogues is the current standard of care for controlling hepatitis B recurrence after orthotopic liver transplantation (OLT). However, frequent immunoglobulin treatment is expensive and inconvenient. This study investigated the efficacy of hepati...
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doi:10.1007/s00535-013-0763-8
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journal_title:Journal of gastroenterology
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doi:
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:At clinical scintigraphic examinations of the abdomen using single photon emission computed tomography (SPECT), we have observed a different distribution between the left and right main liver lobes of various radiopharmaceuticals. This was studied retrospectively in clinical patients. METHODS:Examinations w...
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abstract::We estimated the levels of free sialic acid and sialylated oligosaccharides excreted in the urine of normal donors (n = 10) and patients with gastric cancer (n = 6) and colorectal cancer (n = 4). The total sialic acid level in cancer patients was similar to that in normal donors. However, the ratios of glycosidically ...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/BF01211370
更新日期:1995-02-01 00:00:00
abstract:BACKGROUND:Hypersensitive esophagus (HE) is defined by endoscopy-negative heartburn with a normal acid exposure time but positive symptom association probability (SAP) and/or symptom index (SI) on impedance-pH monitoring, and proton pump inhibitor (PPI) responsiveness. Functional heartburn (FH) is distinguished by nega...
journal_title:Journal of gastroenterology
pub_type: 杂志文章,多中心研究
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更新日期:2017-04-01 00:00:00
abstract:BACKGROUND:The causal association between diabetes and pancreatic cancer remains unclear in Asian populations. This study examined whether gallstones, a cholecystectomy, chronic pancreatitis and the treatment of antidiabetic agents affect the risk of subsequent pancreatic cancer for patients with diabetes in a Taiwanes...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s00535-012-0674-0
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND:In Japan, there are few studies of long-term (more than 1 month) interferon (IFN) therapy for chronic hepatitis B (CHB). In this retrospective study, we investigated the efficacy and predictors of response to 6-month IFN therapy. METHODS:We analyzed 66 Japanese patients with CHB who were treated with IFN fo...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s00535-004-1430-x
更新日期:2004-10-01 00:00:00
abstract:BACKGROUND:Because of the wide overlap between the groups, patients with reflux esophagitis (RE) cannot be distinguished from healthy subjects by basal lower esophageal sphincter (LES) pressure. The LES has radial asymmetry, with maximum pressure on the left side. It has been noted that one directional LES pressure, de...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
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更新日期:2004-07-01 00:00:00
abstract::A rare case of benign diaphragmatic schwannoma in a 38-year-old female is reported. Precontrast computed tomography (CT) showed an encapsulated well-defined round homogeneous tumor with central calcification, measuring approximately 5 cm in diameter, arising from the left diaphragm. Contrast-enhanced CT and gadolinium...
journal_title:Journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.1007/BF02389529
更新日期:1996-04-01 00:00:00
abstract::Various types of polyunsaturated fatty acids (PUFAs) have been suggested to exert different effects on the colon in terms of promotion or inhibition of tumor development. Results of in vitro and in vivo studies are, however, inconsistent and it remains unclear whether or not the cellular effects of PUFAs change along ...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s005350050071
更新日期:1998-04-01 00:00:00
abstract:BACKGROUND:Endotoxin modulates esophageal motor function by increasing nitric oxide (NO) production. The aims of this study were to examine inducible nitric oxide synthase (iNOS) induction in the lower esophageal sphincter (LES) of endotoxemic opossums and to investigate the effects of aminoguanidine (AG), a selective ...
journal_title:Journal of gastroenterology
pub_type: 杂志文章
doi:10.1007/s005350200169
更新日期:2002-01-01 00:00:00
abstract::Pyogenic granulomas represent the aquisition of vasodilative granulation tissue in the skin or mucosa. They are extremely rare in the alimentary tract, other than in the oral cavity. Here, we report a case of pyogenic granuloma arising from the gastric mucosa. An 82-year-old man was admitted to our hospital because of...
journal_title:Journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.1007/s00535-004-1579-3
更新日期:2005-05-01 00:00:00