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Li N, Liu C, Pan DY, Tseng YZ, Zhou J, Zeng XQ, Luo TC, Chen SY. [Effect of Kruppel-like factor 2 on the migration of human liver sinusoidal endothelial cells]. Zhonghua Yi Xue Za Zhi 2018; 98:527-532. [PMID: 29495223 DOI: 10.3760/cma.j.issn.0376-2491.2018.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect and mechanism of Kruppel-like factor 2 (KLF2) on the migration of human liver sinusoidal endothelial cells (LSEC). Methods: Cultured human LSEC were infected with different lenti-viruses to overexpress or suppress KLF2 expression (LV5-KLF2 and LV3-shKLF2, respectively), the infection efficacies were examined by real-time PCR and Western blot analysis.Transwell migration assay was used to investigate the role of KLF2 on the migration of LSEC.The mRNA and protein expression of vascular endothelial growth factor receptor-2 (VEGFR-2) were detected by real-time PCR and Western blot analysis, respectively.The expression and phosphorylation of Src, P38 MAPK, and P44/42 MAPK were detected by Western blot. Results: The up-regulation of KLF2 expression dramatically inhibited migration of treated LSEC, compared with LV5-NC and WT control cells, fewer LV5-KLF2 cells migrated to the lower side of the filter after 12 h [ (35.6±1.4), (71.3±2.4) and (69.3±1.6), P<0.001 for all comparisons]. In contrast, the down-regulation of KLF2 expression promoted the migration of LSEC, more LV3-KLF2 cells migrated to the lower side of the filter compared with the LV3-NC and WT control cells [(189.5±5.4), (83.4±2.5) and (82.2±3.4), P<0.001 for all comparisons]. Furthermore, up-regulation of KLF2 reduced the mRNA and protein expression level of VEGFR2, while down-regulation of KLF2 significantly increased its expression in LSEC.Additionally, up-regulation of KLF2 inhibited the phosphorylation of Src, P38 MAPK, and P44/42 MAPK pathway in LSEC, whereas down-regulation of KLF2 promoted the phosphorylation of those signaling pathway proteins. Conclusions: KLF2 may inhibit the migration of human LSEC through the Src/ MAPK signaling pathway.
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Affiliation(s)
- N Li
- Department of Gatroenterology, Affiliated Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Qian YY, Liu ZS, Pan DY, Li K. Tumoricidal activities of pterostilbene depend upon destabilizing the MTA1-NuRD complex and enhancing P53 acetylation in hepatocellular carcinoma. Exp Ther Med 2017; 14:3098-3104. [PMID: 29042910 PMCID: PMC5639278 DOI: 10.3892/etm.2017.4923] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/20/2017] [Indexed: 12/16/2022] Open
Abstract
The present study aimed to assess the tumoricidal effect of metastasis-associated protein 1 (MTA1) induced by pterostilbene (PTER) in hepatocellular carcinoma (HCC). The SMMC-7721 hepatoma cell line was treated with PTER. Following treatment, the mRNA transcript abundance of MTA1 was measured using quantitative polymerase chain reaction. Additionally, cell viability was determined using an MTT assay, and protein expression was measured through western blotting. Cell invasion, motility and apoptosis, as well as the cell cycle, were also investigated. Following PTER treatment, MTA1, histone deacetylase (HDAC) 1 and HDAC2 were downregulated, whereas the ratio of acetyl-p53 to total p53 was increased in HCC cells. Cell viability decreased as the PTER dose increased. MTA1 may be associated with proliferation, motility, invasion and metastasis in HCC cells. PTER appeared to repress cell proliferation, trigger apoptosis, induce cell cycle arrest, and inhibit motility and invasion via MTA1 in human liver cancer cells. The results of the present study demonstrated that PTER can downregulate the MTA1-nucleosome remodeling and deacetylase complex, and enhance p53 acetylation to inhibit the growth of tumor cells in HCC.
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Affiliation(s)
- Yu-Yuan Qian
- Department of Hepatobiliary Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zhi-Su Liu
- Department of Pancreatic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Ding-Yu Pan
- Department of Pancreatic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Kun Li
- Department of Hepatobiliary Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Abstract
AIM: To investigate the feasibility of treatment for upper gastrointestinal fistula and leakage with personal stage nutrition support.
METHODS: Forty-three patients with upper gastrointestinal fistula and leakage were randomly divided into two groups. Patients in group A were treated with personal stage nutrition support and patients in group B were treated with total parental nutrition (TPN) in combination with operation. Nutritional states of the candidates were evaluated by detecting albumin (Alb) and pre-Alb. The balance between nutrition and hepatic function was evaluated by measurement of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and total bilirubin (Tbill) before and after operation. At the same time their complications and hospitalized time were surveyed.
RESULTS: Personal stage nutrition support improved upper gastrointestinal fistula and leakage. The nutrition state and hepatic function were better in patients who received personal stage nutrition support than in those who did not receive TPN. There was no significant difference in the complication and hospitalized time in the two groups of patients.
CONCLUSION: Upper gastrointestinal fistula and leakage can be treated with personal stage nutrition support which is more beneficial for the post-operation recovery and more economic than surgical operation.
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Wang Q, Liu QY, Liu ZS, Qian Q, Sun Q, Pan DY. Lentivirus mediated shRNA interference targeting MAT2B induces growth-inhibition and apoptosis in hepatocellular carcinoma. World J Gastroenterol 2008; 14:4633-42. [PMID: 18698677 PMCID: PMC2738787 DOI: 10.3748/wjg.14.4633] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effects of lentivirus vector mediated short hairpin RNA interference targeting methionine adenosyltransferase 2β gene (LV-shMAT2B) on hepatocellular carcinoma (HCC) cells.
METHODS: We constructed four plasmids of RNA interference targeting the MAT2B gene. After LV-shMAT2B was transfected with L-02 cells and two kinds of HCC cells, cell viability and proliferation were measured with MTT and [3H]thymidine assays respectively. Flow cytometry was used to assess cell apoptosis. The level of S-adenosyl methionine (SAMe) in HepG2 cells was evaluated. The expressions of cyclin D1, cyclin D2, bcl-xL and bcl-xS were detected with western blot.
RESULTS: We constructed LV-shMAT2B successfully. LV-shMAT2B was safe for human normal liver cells. LV-shMAT2B caused dramatic reduction in proliferation compared with controls in HCC cells Bel-7402 (P = 0.054) and HepG2 (P = 0.031). Flow cytometry analysis showed that cell apoptosis caused by LV-shMAT2B was greater in HCC cells Bel-7402 and HepG2 than in control induced by scrambled siRNA (P = 0.047), but apoptosis rates in L-02 induced by LV-shMAT2B and scrambled siRNA respectively had no significant difference. Moreover, LV-shMAT2B significantly suppressed expression of MAT2B leading to growth-inhibition effect on HCC cells by down-regulating cyclin D1. Apoptosis induced by LV-shMAT2B was involved in down-regulating bcl-xL and up- regulating bcl-xS.
CONCLUSION: LV-shMAT2B can induce cell apoptosis and growth-inhibition in HCC cells. MAT2B may be a therapy target in HCC in the future.
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Wang HL, Deng CS, Lin J, Pan DY, Zou ZY, Zhou XY. Expression of angiopoietin-2 is correlated with vascularization and tumor size in human colorectal adenocarcinoma. TOHOKU J EXP MED 2007; 213:33-40. [PMID: 17785951 DOI: 10.1620/tjem.213.33] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Angiopoietins are endothelial growth factors, which play crucial roles in normal vascular development and tumor angiogenesis. We examined the expression profiles of angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), vascular endothelial growth factor (VEGF), and Tie-2, a receptor for Ang-1 and Ang-2, in both colorectal adenocarcinoma and adjacent normal tissues, as judged by histology, in order to elucidate their relationships with microvascular density (MVD) and clinicopathologic properties. Higher MVD was associated with a lower degree of differentiation of colorectal adenocarcinoma. Immunohistochemical analysis revealed that the expression of Ang-2 and VEGF was significantly increased in colorectal adenocarcinoma compared to adjacent normal tissues (p < 0.01), and the expression of Ang-2 positively correlated with that of VEGF (r = 0.997, p < 0.01). In contrast, the expression of Ang-1 was lower in adenocarcinoma tissues than in adjacent normal tissues (p < 0.01), while there was no significant difference in Tie-2 expression in both tissues. Moreover, MVD was increased in Ang-2- and VEGF-expressing adenocarcinoma tissues compared to the Ang-2- and VEGF-negative tissues, respectively (p < 0.01). Importantly, MVD was lower in Ang-1-expressing adenocarcinoma tissues relative to Ang-1-negative tissues (p < 0.01). Furthermore, expression of Ang-2 as well as VEGF was significantly up-regulated in colorectal adenocarcinoma with diameters > or = 5 cm or with lymph-node metastases (p < 0.01). In conclusion, the increased expression of Ang-2 and the decreased expression of Ang-1 may be responsible for blood vessel formation and rapid growth of the colorectal adenocarcinoma.
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Affiliation(s)
- Hong-Ling Wang
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei Province, China
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Abstract
AIM: To investigate the effect of complex amino acid imbalance on the growth of tumor in tumor-bearing (TB) rats.
METHODS: Sprague-Dawlley (SD) rats underwent jejunostomy for nutritional support. A suspension of Walker-256 carcinosarcoma cells was subcutaneously inoculated. TB rats were randomly divided into groups A, B, C and D according to the formula of amino acids in enteral nutritional solutions, respectively. TB rats received jejunal feedings supplemented with balanced amino acids (group A), methionine-depleted amino acids (group B), valine-depleted amino acids (group C) and methionine- and valine-depleted complex amino acid imbalance (group D) for 10 days. Tumor volume, inhibitory rates of tumor, cell cycle and life span of TB rats were investigated.
RESULTS: The G0/G1 ratio of tumor cells in group D (80.5 ± 9.0)% was higher than that in groups A, B and C which was 67.0% ± 5.1%, 78.9% ± 8.5%, 69.2% ± 6.2%, respectively (P < 0.05). The ratio of S/G2M and PI in group D were lower than those in groups A, B and C. The inhibitory rate of tumor in groups B, C and D was 37.2%, 33.3% and 43.9%, respectively (P < 0.05). The life span of TB rats in group D was significantly longer than that in groups B, C, and A.
CONCLUSION: Methionine/valine-depleted amino acid imbalance can inhibit tumor growth. Complex amino acids of methionine and valine depleted imbalance have stronger inhibitory effects on tumor growth.
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Affiliation(s)
- Yin-Cheng He
- Department of General Surgery, Zhongnan Hospital, Wuhan University, Wuhan 430071, Hubei Province, China.
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Abstract
AIM: To investigate the toxicities, biodistribution and anticancer effect of 5-fluorouracil controlled release implant (5-FUCI) on Walker 256 carcinosarcoma cells in Wistar rats.
METHODS: Experiment 1: Wistar rats were randomly divided into three groups (27 rats per group). Blank implant was implanted in left lobe of the liver, and rats were treated with saline solution (in group A) or 5-fluorouracil (subcutaneous injection, group B). 5-FUCI was inserted in left lobe of the liver (group C). The gastrointestinal and hematological toxicities were observed and contents of element F in group C were assayed. Experiment 2: on day 6 after Walker-256 carcinosarcoma transplantation in left lobe of the liver, 5-FUCI was implanted in right lobe of the liver (group E) or left lobe (group F), and rats in control group (group D) were inserted blank implant. Tumor inhibition rate and survival time were investigated.
RESULTS: 5-FUCI showed no obvious toxic effect, extraction of Evan’s blue from gastrointestinal tissue was normal, the peripheral white blood cells and bone marrow nucleated cells were not reduced, compared with control group (P > 0.05). Histological examination revealed that there were no visible changes in small intestinal mucosa, The concentration of 5-fluorouracil in left lobe of the liver was 9.84, 28, 34 times as much as those of right lobe of the liver, heart and kidney respectively after the implantation in group C. They kept a high level of fluorouracil in left lobe of the liver, ranging from (4.414% ± 0.482%) to (7.800% ± 0.804%), for eight weeks. Survival days were 28.0 ± 2.2, 30.0 ± 3.2 and 38.7 ± 6.7 d in group D, E and F, respectively.
CONCLUSION: 5-FUCI shows no obvious toxicities to gastrointestinal tract and myelotoxicity. After implantation, it kept a high level of 5- fluorouracil in surrounding tissues of the implant for eight weeks. Its antitumor effect on Walker-256 carcinosarcoma is demonstrated.
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Affiliation(s)
- Yin-Cheng He
- Department of General Surgery, Zhongnan Hospital, Wuhan University, Wuhan 430071, Hubei Province, China.
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Pan DY, Qiao JG, Chen JW, Huo YC, Zhou YK, Shi HA. Tamoxifen combined with octreotide or regular chemotherapeutic agents in treatment of primary liver cancer: a randomized controlled trial. Hepatobiliary Pancreat Dis Int 2003; 2:211-5. [PMID: 14599971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To evaluate the effect of tamoxifen (TAM) combined with a somatostatin analogue, octretide (OCT) on advanced liver cancer and whether tamoxifen combined with OCT is superior to regular chemotherapeutic agents 5-Fu and mitomycin C (MMC). METHODS Thirty-nine patients with inoperable liver cancer were randomly subdivided into TAM+OCT group (n=24) and regular chemotherapeutic group (n=15). They received treatment for three months respectively. Blood cell count, liver function, immunologic function, blood alpha-FP was regularly measured. Liver lump and extrahepatic metastasis were examined by CT. The patients were followed up after treatment and conducted survival analysis. RESULTS In the TAM+OCT group, complete response is 4 patients, partial response is 7 patients, no change is 9 patients and progressive disease is 4 patients; blood level of ALT and AST had no noticeable change, IgE and IgG increased (P<0.01), and alpha-FP lowered (P<0.05). In regular chemotherapeutic group, no change is 4 patients and progressive disease is 11 patients. There was conspicuous statistical difference in the two groups. The accumulative survival rates of 6 months, 1 year and 2 years were 95.7% vs 41.2% (P<0.01), 63.7% vs 21.1% (P<0.01), 25.4% vs 0 (P<0.01), respectively. Medium survival time was 12.8 months in TAM+OCT group and 5.5 months in chemotherapeutic group. CONCLUSIONS TAM+OCT excerts reliable therapeutic effect on patients with inoperable ER(+) hepatocellular cancer. It is superior to 5-Fu and MMC in increasing the survival rate, prolonging survival time, and reducing side-effects.
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Affiliation(s)
- Ding-Yu Pan
- Department of General Surgery, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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Abstract
AIM: To investigate the effects of methionine/valine-depleted enteral nutrition (EN) on RNA, DNA and protein metabolism in tumor-bearing (TB) rats.
METHODS: Sprague-Dawlley (SD) rats underwent jejunostomy for nutritional support. A suspension of Walker-256 carcinosarcoma cells was subcutaneously inoculated. 48 TB rats were randomly divided in 4 groups: A, B, C and D. The TB rats had respectively received jejunal feedings supplemented with balanced amino acids, methionine-depleted, balanced amino acids and valine-depleted for 6 d before injection of 740 KBq 3H- methionine/valine via jejunum. The 3H incorporation rate of the radioactivity into RNA, DNA and proteins in tumor tissues at 0.5, 1, 2, 4 h postinjection of tracers was assessed with liquid scintillation counter.
RESULTS: Incorporation of 3H into proteins in groups B and D was (0.500 ± 0.020)% to (3.670 ± 0.110)% and (0.708 ± 0.019)% to (3.813 ± 0.076)% respectively, lower than in groups A [(0.659 ± 0.055)% to (4.492 ± 0.108)%] and C [(0.805 ± 0.098)% to (4.180 ± 0.018)%]. Incorporation of 3H into RNA, DNA in group B was (0.237 ± 0.075)% and (0.231 ± 0.052)% respectively, lower than in group A (P < 0.01). There was no significant difference in uptake of 3H by RNA and DNA between group C and D (P > 0.05).
CONCLUSION: Protein synthesis was inhibited by methionine/valine starvation in TB rats and nucleic acid synthesis was reduced after methionine depletion, thus resulting in suppression of tumor growth.
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Affiliation(s)
- Yin-Cheng He
- Department of general surgery, Zhongnan Hospital, Wuhan University, Wuhan 430071, China.
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Tsai SC, Kao CH, Pan DY, ChangLai SP, Wang SJ. Effects of oral erythromycin on esophageal motility in patients with noninsulin-dependent diabetes mellitus. Gaoxiong Yi Xue Ke Xue Za Zhi 1995; 11:430-5. [PMID: 7674422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Fifteen patients with non-insulin dependent diabetes mellitus (NIDDM) were included in the study. Esophageal motility, including esophageal mean transit time (MTT), residual fraction (RF), and retrograde index (RI), was evaluated and calculated by the radionuclide esophageal transit test (RETT). The baseline study was performed before the oral erythromycin therapy. After a 2-week course treatment, the subjects underwent a second study. The results showed that (A) in the baseline study, 93% (14/15) of NIDDM patients had a longer MTT, 67% (10/15) had a higher RF and 80% (12/15) had a higher RI; and (B) after treatment with erythromycin, 73% (11/15) of the patients had a shorter MTT and a lower RF, and 60% (9/15) of the patients had a lower RI. We conclude that (1) most of the NIDDM patients had esophageal motility disorders and (2) a 2-week oral erythromycin therapy can improve diabetic esophagoparesis, as evaluated by non-invasive REET.
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Affiliation(s)
- S C Tsai
- Department of Nuclear Medicine, Taichung Veterans General Hospital, Taiwan, Republic of China
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Pan DY, Chen GH, Chang CS, Ho KS, Poon SK, Huang CK, Kao CH, Wang SJ. Effect of oral erythromycin on patients with diabetic gastroparesis. Zhonghua Yi Xue Za Zhi (Taipei) 1995; 55:447-451. [PMID: 7634182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
BACKGROUND Abnormal gastrointestinal motility is a well recognized complication of diabetes mellitus, and disordered gastric emptying may hamper glycemic control. The objects of this study were to investigate the effect of oral erythromycin on gastric emptying and to evaluate the effect of corrected gastric emptying on glycemic control in patients with diabetic gastroparesis. METHODS Twenty patients of Type II (non-insulin-dependent) diabetes mellitus with typical symptoms of gastroparesis and delayed solid phase gastric emptying were studied. There were 18 males and 2 females, aged 49 to 72 years. Erythromycin (erythromycin estolate) was given orally at a dose of 250 mg, 3 times daily, 30 minutes before each meal. Radionuclide-labelled solid phase gastric emptying and fasting blood sugar (FBS) were studied after one day of erythromycin therapy, and again after 2 weeks of the therapy. The half time of gastric emptying (GETt1/2) represented the time needed for 50 percent of the initial radioactivity to leave the stomach, and was used to express the gastric emptying status. RESULTS The GETt1/2 decreased from 198.0 +/- 58.9 minutes at baseline to 139.1 +/- 67.6 minutes following one day of erythromycin therapy (p < 0.01), and to 137.1 +/- 71.2 minutes after two weeks of treatment (vs. baseline p < 0.01). The FBS decreased from 159.0 +/- 40.2 mg/dl at baseline to 149.0 +/- 38.5 mg/dl following one day of therapy (p = 0.12, NS), and to 139.2 +/- 39.8 mg/dl after two weeks of treatment (vs. baseline p < 0.02). CONCLUSIONS It was concluded that erythromycin is an effective prokinetic agent for diabetic gastroparesis, and that corrected gastric emptying may improve glycemic control.
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Affiliation(s)
- D Y Pan
- Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan, R.O.C
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Kao CH, Pan DY, Wang SJ, Chen GH. The relationship between Helicobacter pylori infection and gastric emptying in patients with non-insulin-dependent diabetes mellitus. Eur J Nucl Med 1995; 22:122-5. [PMID: 7758498 DOI: 10.1007/bf00838941] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Forty-four patients with non-insulin-dependent diabetes mellitus (NIDDM) were included in this study. Radionuclide-labelled solid meals were used to calculate gastric emptying times (GETs). The carbon-14 urea breath test (14C-UBT) was used to diagnose Helicobacter pylori (HP) infection. The patients were separated into groups according to the following two criteria: (1) HP infection was diagnosed on the basis of a 14C-UBT value of > or = 1.5; (2) the GET was defined as abnormal when it was > or = 117.1 min. The results showed that 61% (27/44) of the NIDDM patients had an HP infection, and 59% (26/44) had an abnormal GET. The incidence of abnormal GET in positive 14C-UBT patients (62%) was higher than that in negative 14C-UBT patients (56%). Similarly, the incidence of positive 14C-UBT in abnormal GET cases (62%) was higher than that in normal GET cases (56%). However, according to chi-square tests the differences were not significant. In conclusion, no significant relationship between HP infection and GET was found in patients with NIDDM.
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Affiliation(s)
- C H Kao
- Department of Nuclear Medicine, Taichung Veterans General Hospital, Taiwan, Republic of China
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Abstract
Previous studies have indicated that the regression versus progression of v-src-DNA-induced sarcomas is dependent on chicken line. As a first step in analyzing the role of tumor immunity as a determinant of this line dependence, experiments were undertaken to ascertain whether an antisarcoma immune response is generated in the course of sarcoma growth in TK chickens, a regressor line. To assay for this response, test TK chickens in which v-src-induced wing web sarcomas had regressed, as well as control TK chickens that had not been exposed to v-src, were challenged in protocols known to yield v-src-dependent sarcoma formation and monitored for challenge sarcoma growth. Compared with the control chickens, the test chickens showed a significant resistance to the sarcomagenic challenge. These results raise the possibility that the antisarcoma response that is inducible in regressor lines, as demonstrated here in terms of a protective effect against a subsequent sarcomagenic challenge, may also underlie the regression of v-src-induced primary sarcomas.
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MESH Headings
- Animals
- Avian Sarcoma Viruses/genetics
- Avian Sarcoma Viruses/physiology
- Chickens
- DNA, Neoplasm/isolation & purification
- DNA, Viral/genetics
- DNA, Viral/isolation & purification
- Defective Viruses/genetics
- Defective Viruses/physiology
- Genes, src
- Neoplasm Regression, Spontaneous/genetics
- Neoplasm Regression, Spontaneous/immunology
- Neoplasm Regression, Spontaneous/pathology
- Plasmids
- Restriction Mapping
- Sarcoma, Experimental/immunology
- Sarcoma, Experimental/microbiology
- Sarcoma, Experimental/pathology
- Species Specificity
- Virus Replication/genetics
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Affiliation(s)
- T W Wisner
- Wistar Institute of Anatomy and Biology, Philadelphia, Pennsylvania 19104
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