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Chen XX, Yang CW, Huang LB, Niu QS, Jiang SZ, Chi F. Zearalenone Altered the Serum Hormones, Morphologic and Apoptotic Measurements of Genital Organs in Post-weaning Gilts. Asian-Australas J Anim Sci 2015; 28:171-9. [PMID: 25557812 PMCID: PMC4283161 DOI: 10.5713/ajas.14.0329] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/28/2014] [Accepted: 09/05/2014] [Indexed: 11/30/2022]
Abstract
The present study was aimed at investigating the adverse effects of dietary zearalenone (ZEA) (1.1 to 3.2 mg/kg diet) on serum hormones, morphologic and apoptotic measurements of genital organs in post-weaning gilts. A total of twenty gilts (Landrace×Yorkshire×Duroc) weaned at 21 d with an average body weight of 10.36±1.21 kg were used in the study. Gilts were fed a basal diet with an addition of 0, 1.1, 2.0, or 3.2 mg/kg purified ZEA for 18 d ad libitum. Results showed that 3.2 mg/kg ZEA challenged gilts decreased (p<0.05) the serum levels of luteinizing hormone, however, serum levels of prolactin in gilts fed the diet containing 2.0 mg/kg ZEA or more were increased (p<0.05) compared to those in the control. Linear effects on all tested serum hormones except progesterone were observed as dietary ZEA levels increased (p<0.05). Gilts fed ZEA-contaminated diet showed increase (p<0.05) in genital organs size, hyperplasia of submucosal smooth muscles in the corpus uteri in a dose-dependent manner. However, the decreased numbers of follicles in the cortex and apoptotic cells in the ovarian were observed in gilts treated with ZEA in a dose-dependent manner. Degeneration and structural abnormalities of genital organs tissues were also observed in the gilts fed diet containing 1.1 mg/kg ZEA or more. Results suggested that dietary ZEA at 1.1 to 3.2 mg/kg can induce endocrine disturbance and damage genital organs in post-weaning gilts.
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Affiliation(s)
- X X Chen
- College of Life science, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - C W Yang
- College of Life science, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - L B Huang
- College of Life science, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Q S Niu
- College of Life science, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - S Z Jiang
- College of Life science, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - F Chi
- Amlan International, Chicago, IL 60604, USA
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Lei DM, Piao SG, Jin YS, Jin H, Cui ZH, Jin HF, Jin JZ, Zheng HL, Li JJ, Jiang YJ, Yang CW, Li C. Expression of erythropoietin and its receptor in kidneys from normal and cyclosporine-treated rats. Transplant Proc 2014; 46:521-8. [PMID: 24656003 DOI: 10.1016/j.transproceed.2013.12.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 12/07/2013] [Accepted: 12/16/2013] [Indexed: 01/08/2023]
Abstract
Long-term treatment with cyclosporine A (CsA) is associated with various types of complications; however, CsA-induced anemia has not been reported. The present study examined the impact of CsA on hematopoietic parameters and intrarenal expression of erythropoietin (EPO) and the EPO receptor (EPOR) in a rat model of chronic CsA nephrotoxicity. Sprague-Dawley rats were fed a low-salt diet (0.05% sodium) and were treated daily for 4 weeks with vehicle (olive oil 1 mL/kg subcutaneously) or CsA (15 mg/kg subcutaneously). The expression of EPO and EPOR was evaluated by immunohistochemistry and immunoblotting, and hematopoietic parameters were assessed by measuring blood hemoglobin and hematocrit levels, and these variables were compared between treatment groups. Renal function, oxidative stress, histopathology (tubulointerstitial fibrosis), apoptotic cell death, and expression of transforming growth factor β-inducible gene-h3 (βig-h3) were also compared between treatment groups. In kidneys from vehicle-treated rats, endogenous EPO and EPOR protein were expressed constitutively in the outer stripe of the outer medulla and the cortex. EPO protein expression decreased significantly in kidneys from CsA-treated rats. By contrast, EPOR expression was higher in kidneys from CsA-treated rats than in vehicle-treated rats. These changes were accompanied by decreases in serum hemoglobin and hematocrit levels and correlated with the number of cells positive for terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (r = -0.769, P = .003) and βig-h3 protein expression (r = -0.910, P < .001). Long-term treatment with CsA suppresses renal endogenous EPO expression, resulting in anemia. Increases in apoptotic cell death and βig-h3 expression are closely associated with inhibition of EPO expression in chronic CsA nephrotoxicity.
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Affiliation(s)
- D M Lei
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - S G Piao
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China; Transplant Research Center, Convergent Research Consortium for Immunologic Disease, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea
| | - Y S Jin
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - H Jin
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - Z H Cui
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - H F Jin
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - J Z Jin
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - H L Zheng
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - J J Li
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - Y J Jiang
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China
| | - C W Yang
- Transplant Research Center, Convergent Research Consortium for Immunologic Disease, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea
| | - C Li
- Nephrology and Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, Jilin, China.
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Yang KS, Kim JI, Moon IS, Choi BS, Park CW, Yang CW, Kim YS, Chung BH. The clinical outcome of end-stage renal disease patients who return to peritoneal dialysis after renal allograft failure. Transplant Proc 2014; 45:2949-52. [PMID: 24157010 DOI: 10.1016/j.transproceed.2013.08.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND With the increased numbers of kidney transplantations, more patients return to dialysis after graft loss (DAGL). The aim of this study was to investigate the safety and efficacy of peritoneal dialysis (PD) after graft loss compared with transplant-naive PD patients (TN-PD). METHOD This study was conducted on 715 patients who started PD between 1988 and 2009, including 47 who started PD after allograft loss (DAGL-PD) and 668 in the (TN-PD) group. RESULT The mean ages were 40.8 ± 10.7 in DAGL-PD group and 51.03 ± 14.20 in TN-PD group (P < .01). The most common cause of end-stage renal disease in DAGL was primary glomerulonephritis (76.6%), but it was diabetes mellitus (38.9%) in the TN-PD group (P < .05). Patient survival rates at 1, 5, and 10 years were not different: 100%, 86%, and 57% versus 91%, 70%, and 62%, respectively. PD survival rate at 1, 5, and 10 years did not show significant differences: 98%, 95%, and 88% versus 95%, 80%, and 66%, respectively. The most common causes of death in both groups were infection (DAGL, 26.7%; TN-PD, 24.5%) followed by cardiovascular disease (DAGL, 20.0%; TN-PD, 19.6%); the distribution of causes did not differ significantly (P > .05). CONCLUSION The clinical outcomes of PD in DAGL group were comparable with those of TN-PD patients. Therefore, PD could be considered as a dialysis modality for patients who experience allograft failure.
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Affiliation(s)
- K S Yang
- Division of Nephrology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Hwang JK, Chun HJ, Kim JM, Kwon KH, Kim YK, Kim SD, Park SC, Choi BS, Kim JI, Yang CW, Kim YS, Moon IS. Contrast-enhanced magnetic resonance angiography in the early period after kidney transplantation. Transplant Proc 2014; 45:2925-30. [PMID: 24157005 DOI: 10.1016/j.transproceed.2013.08.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Our objective was to evaluate the usefulness of three-dimensional (3-D) contrast-enhanced (CE) magnetic resonance angiography (MRA) to assess renal parenchyma, arterial inflow stenosis, and peritransplant fluid collections in the early period after kidney transplantation (KT). Between January 2010 and April 2011, we examined a consecutive series of 144 renal transplants using 3-D CE MRA at 14 days after KT. MRA showed parenchyma infarctions (n = 17, 11.8%), arterial inflow stenoses (n = 23, 16%), lymphoceles (n = 14, 9.7%), and hematomas (n = 6, 4.2%). The degree of renal transplant artery inflow stenosis was graded qualitatively based on diameter criterion; <50% = mild, 50% to 70% = moderate, and >70% = severe in 10 (6.9%), 5 (3.5%), and 8 (5.6%) subjects, respectively. The study recipients were divided into 3 groups according to the degree of renal artery inflow stenosis (group I: normal; group II: mild and moderate, <70%; group III: severe, >70%). Among group III patients who underwent digital subtraction angiography, 5 had percutaneous transluminal angioplasty or stenting performed after 1 month. Their mean resume creatinine levels at 1, 6, and 12 months after transplantation were not significantly different from those in the other groups (P = .391, .447, .110). The prevalence of graft loss (n = 2) was high in group III (P = .012), although the frequency of acute rejection episodes was not different among the groups (P = .890). The incidences of renal parenchyma infarction, peritransplant fluid collection and arterial inflow stenosis were unexpectedly high in the early period after KT. Thus, 3-D CE MRA provided a rapid global assessment of the renal parenchyma, transplant arterial system, and peritransplant fluid collection that can be helpful to detect or exclude many causes of renal transplant dysfunction.
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Affiliation(s)
- J K Hwang
- Division of Transplantation Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Xiang Y, Piao SG, Zou HB, Jin J, Fang MR, Lei DM, Gao BH, Yang CW, Li C. L-carnitine protects against cyclosporine-induced pancreatic and renal injury in rats. Transplant Proc 2014; 45:3127-34. [PMID: 24157049 DOI: 10.1016/j.transproceed.2013.08.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND L-carnitine has protective effects against various types of injury. This study was designed to evaluate the beneficial effects of L-carnitine on pancreatic and renal injuries caused by cyclosporine (CsA). METHODS Rats maintained on a low sodium diet were given vehicle (olive oil, 1 mL/kg/d), CsA (15 mg/kg/d), L-carnitine (50 or 200 mg/kg/d), or a combination of CsA and L-carnitine for 4 weeks. The impact of L-carnitine on pancreatic injury was assessed by blood glucose levels, plasma insulin concentrations, and hemoglobulin A1c (HbA1c). In addition, the protective effects of L-carnitine against CsA-induced kidney injury were evaluated in terms of renal function, histopathology (inflammatory cell influx and tubulointerstitial fibrosis), oxidative stress (8-hydroxy 2'-deoxyguanosine, 8-OHdG), transforming growth factor-betal (TGF-β1), apoptosis (caspase-3), and autophagy (LC3-II). RESULTS CsA treatment caused diabetes, renal dysfunction, tubulointerstitial inflammation (ED-1-positive cells), and fibrosis, which were accompanied by an increase in 8-OHdG production and upregulation of TGF-β1, caspase-3, and LC3-II. Concomitant administration of L-carnitine increased plasma insulin concentrations, decreasing plasma glucose and HbA1c levels. In the kidney, L-carnitine induced dose-dependent improvement of renal function, inflammation, and fibrosis in parallel with suppression of the expression of TGF-β1 and 8-OHdG. Furthermore, the administration of L-carnitine at a high dose inhibited the expression of caspase-3 and LC3-II. CONCLUSION These findings suggest that L-carnitine has a protective effect against CsA-induced pancreatic and renal injuries.
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Affiliation(s)
- Y Xiang
- Nephrology & Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, YanJi, JiLin, PR China
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Hong YA, Choi DE, Lim SW, Yang CW, Chang YK. Decreased parathyroid Klotho expression is associated with persistent hyperparathyroidism after kidney transplantation. Transplant Proc 2014; 45:2957-62. [PMID: 24157012 DOI: 10.1016/j.transproceed.2013.08.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Although successful kidney transplantation usually corrects hyperparathyroidism, the condition persists in some patients. The present study was designed to determine whether Klotho or fibroblast growth factor 23, the key regulator of parathyroid hormone, is involved in persistent hyperparathyroidism in kidney transplant recipients (KTRs). Nineteen hyperplastic parathyroid glands were obtained from end-stage renal disease (ESRD) patients and KTRs; 6 normal parathyroid glands were used as controls. We compared the expression of Klotho, fibroblast growth factor receptor 1 (FGFR1) and calcium-sensing receptor (CaSR) in the KTRs and ESRD patients. Expressions of Klotho, FGFR1, CaSR and vitamin D receptor, as evaluated by immunohistochemistry, were quantified as the number of positive cells per unit area. The Klotho, FGFR1 and CaSR expressions in parathyroid glands of the post-kidney transplantation (PSKT) and the ESRD groups were significantly decreased compared with normal controls. In the ESRD group, Klotho expression and number of proliferating cell nuclear antigen-positive cells in the parathyroid gland were significantly decreased in parathyroid adenomas as compared with parathyroid hyperplasia. The expression of FGFR1 and CaSR in the parathyroid glands was significantly increased in the PSKT compared with the ESRD group. There was no significant difference in Klotho expression between the PSKT and ESRD groups. Incomplete recovery of Klotho levels in the parathyroid gland may play a role in the pathogenesis of tertiary hyperparathyroidism after kidney transplantation.
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Affiliation(s)
- Y A Hong
- Department of Internal Medicine, Seoul St. Mary's Hospital, Seoul, South Korea
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Affiliation(s)
- Hsu-Heng Yen
- Endoscopy Center, Changhua Christian Hospital, Changhua, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan
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Yang CW, Wang D, Tang Q. Pretreatment of furfural industrial wastewater by Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate processes: a comparative study. Water Sci Technol 2014; 70:414-421. [PMID: 25098869 DOI: 10.2166/wst.2014.242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate (PDS) processes have been applied for the treatment of actual furfural industrial wastewater in this paper. Through the comparative study of the three processes, a suitable pretreatment technology for actual furfural wastewater treatment was obtained, and the mechanism and dynamics process of this technology is discussed. The experimental results show that Fenton technology has a good and stable effect without adjusting pH of furfural wastewater. At optimal conditions, which were 40 mmol/L H₂O₂ initial concentration and 10 mmol/L Fe²⁺ initial concentration, the chemical oxygen demand (COD) removal rate can reach 81.2% after 90 min reaction at 80 °C temperature. The PDS process also has a good performance. The COD removal rate could attain 80.3% when Na₂S₂O₈ initial concentration was 4.2 mmol/L, Fe²⁺ initial concentration was 0.1 mol/L, the temperature remained at 70 °C, and pH value remained at 2.0. The electro-Fenton process was not competent to deal with the high-temperature furfural industrial wastewater and only 10.2% COD was degraded at 80 °C temperature in the optimal conditions (2.25 mA/cm² current density, 4 mg/L Na₂SO₄, 0.3 m³/h aeration rate). For the Fenton, electro-Fenton and PDS processes in pretreatment of furfural wastewater, their kinetic processes follow the pseudo first order kinetics law. The pretreatment pathways of furfural wastewater degradation are also investigated in this study. The results show that furfural and furan formic acid in furfural wastewater were preferentially degraded by Fenton technology. Furfural can be degraded into low-toxicity or nontoxic compounds by Fenton pretreatment technology, which could make furfural wastewater harmless and even reusable.
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Affiliation(s)
- C W Yang
- College of Environmental Science and Engineering, Jilin Normal University, Siping, Jilin, 136000, China E-mail:
| | - D Wang
- School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Q Tang
- College of Environmental Science and Engineering, Jilin Normal University, Siping, Jilin, 136000, China E-mail:
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Kim HG, Kim EY, Yu YJ, Kim GH, Jeong JW, Byeon JH, Chung BH, Yang CW. Comparison of clinical outcomes in hepatitis B virus-positive kidney transplant recipients with or without pretransplantation antiviral therapy. Transplant Proc 2013; 45:1374-8. [PMID: 23726576 DOI: 10.1016/j.transproceed.2013.01.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 01/24/2013] [Indexed: 12/15/2022]
Abstract
BACKGROUND Antiviral agents have improved the outcomes of hepatitis B virus (HBV)-positive kidney transplant recipients (KTRs). Preemptive therapy has been the main approach to forestall HBV reactivation. We sought to compare prophylactic and preemptive approaches. METHODS We divided the 69 HBV-positive KTRs into treatment and historical control groups, according to the time of starting pretransplantation antiviral therapy. The treatment group was further divided into prophylactic and preemptive therapy groups. RESULTS The treatment group showed a significant improvement in 10-year graft (82% vs 34%) and patient (91% vs 57%) survivals. Among the historical control group, the main causes of graft failure were patient deaths (68%), which were mostly caused by liver diseases. In contrast, there was no liver-related death in the treatment group. In addition, there was no difference in graft or patient survival between the prophylactic and preemptive groups, but the incidence of HBV reactivation was lower in the prophylactic group. Antiviral therapy was an independent factor for the improved patient survival (P = .005). CONCLUSIONS Pretransplantation antiviral therapy is essential to improve clinical outcomes. Prophylactic may be better than preemptive antiviral therapy to decrease HBV reactivation.
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Affiliation(s)
- H G Kim
- Division of Nephrology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Chung BH, Yun JT, Ha SE, Kim JI, Moon IS, Choi BS, Park CW, Kim YS, Yang CW. Combined use of rituximab and plasmapheresis pre-transplant increases post-transplant infections in renal transplant recipients with basiliximab induction therapy. Transpl Infect Dis 2013; 15:559-68. [PMID: 24011062 DOI: 10.1111/tid.12135] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 02/21/2013] [Accepted: 03/24/2013] [Indexed: 12/22/2022]
Abstract
INTRODUCTION We investigated the effect of combined use of rituximab (RTX) and plasmapheresis (PP) pre-transplant on post-transplant infection. METHODS A total of 196 patients undergoing living-donor kidney transplantation at Seoul St. Mary's Hospital, all of whom underwent basiliximab induction therapy, were included in the study. They were divided into 3 groups: RTX/PP/intravenous immune globulin (IVIG) (the RPI group; n = 53), RTX monotherapy (the RTX group; n = 14), and control (the CONT group; n = 129). We compared the post-transplant infections in the 3 groups. RESULTS The overall prevalence of infection was significantly higher, and the infection-free survival rate was lower, in the RPI group compared with the RTX or CONT groups (P < 0.05). A trend toward more severe bacterial infections was seen in the RPI group compared with the other groups, and fungal infections developed only in the RPI group. After anti-rejection therapy, a significantly higher rate of infection developed in the RPI group than in the other groups (P < 0.05). In addition, the RPI group was an independent risk factor for the development of infection. CONCLUSION Our results show that in the setting of basiliximab induction, the use of combined RTX and PP therapy pre-transplant significantly increases the risk for post-transplant infection.
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Affiliation(s)
- B H Chung
- Transplant Research Center, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea; Division of Nephrology, Department of Internal Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
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Yang CW, Yen HH, Choo CH. Hematemesis in a man with longstanding esophageal globus sensation. Gastroenterology 2013; 144:e11-2. [PMID: 23380948 DOI: 10.1053/j.gastro.2012.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 10/26/2012] [Accepted: 11/02/2012] [Indexed: 12/02/2022]
Affiliation(s)
- Chia-Wei Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
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Yang CW, Yen HH, Su PY. Black stool in a woman with red spots on her hands. Gastroenterology 2013; 144:e5-e6. [PMID: 23260496 DOI: 10.1053/j.gastro.2012.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 09/07/2012] [Indexed: 12/02/2022]
Affiliation(s)
- Chia-Wei Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Hsu-Heng Yen
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Pei-Yuan Su
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
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Yang CW, Yen HH, Chen YY, Soon MS, Chen CJ. Novel Use of the Tip of a Standard Diathermic Snare for Endoscopic Submucosal Dissection of a Large Gastric Adenomatous Polyp. J Laparoendosc Adv Surg Tech A 2012; 22:910-2. [PMID: 23057620 DOI: 10.1089/lap.2012.0202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Chia-Wei Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Hsu-Heng Yen
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Yang-Yuan Chen
- Department of Gastroenterology, China Medical University Hospital, Taichung, Taiwan
| | - Maw-Soan Soon
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Chih-Jung Chen
- Department of Pathology, Changhua Christian Hospital, Changhua, Taiwan
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Li YJ, Wu HH, Weng CH, Chen YC, Hung CC, Yang CW, Wang RYL, Sakamoto N, Tian YC. Cyclophilin A and nuclear factor of activated T cells are essential in cyclosporine-mediated suppression of polyomavirus BK replication. Am J Transplant 2012; 12:2348-62. [PMID: 22642569 DOI: 10.1111/j.1600-6143.2012.04116.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Immunosuppressants have impacts on the development of polyomavirus-associated nephropathy. We previously demonstrated that cyclosporin A (CsA) suppressed polyomavirus BK (BKV) replication. The role of cyclophilin A (CypA) and nuclear factor of activated T cells (NFAT) in CsA-imposed suppression of BKV replication was determined in this study. Results demonstrated that knockdown of CypA but not CypB significantly reduced BKV large T antigen (TAg) expression and BKV titer. Overexpression of CypA reversed CypA siRNA-induced inhibition in BKV TAg expression. In addition, CypA overexpression attenuated the suppressive effect of CsA on TAg expression, suggesting CypA implicated in CsA-mediated anti-BKV effect. Knockdown of NFATc3 abrogated TAg expression, while overexpression of NFATc3 promoted TAg expression and augmented BKV promoter activity. NFATc3 binding to the BKV promoter was verified by chromatin immunoprecipitation assay and electrophoretic mobility shift assay. Renal histology also displayed an increase in NFATc3 expression in tubulointerstitium of BKV-associated nephropathy. Furthermore, overexpression of NFATc3 rescued CsA-mediated inhibition of BKV load and TAg expression. A CsA analog, NIM811, which cannot block NFAT functionality, failed to suppress TAg expression. In conclusion, CypA and NFAT are indispensable in BKV replication. CsA inhibits BKV replication through CypA and NFAT, which may be potential targets of anti-BKV treatment.
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Affiliation(s)
- Y J Li
- Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Taipei, Taiwan
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Kim SH, Hwang HS, Yoon HE, Kim YK, Choi BS, Moon IS, Kim JC, Hwang TK, Kim YS, Yang CW. Long-term risk of hypertension and chronic kidney disease in living kidney donors. Transplant Proc 2012; 44:632-4. [PMID: 22483456 DOI: 10.1016/j.transproceed.2011.12.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aim of this study was to assess the long-term risks of chronic kidney disease and arterial hypertension in living kidney donors. METHODS Donors who were followed for more than 1 year after nephrectomy were included. We assessed each donor's blood pressure, urine protein, and estimated glomerular filtration rate (eGFR). RESULTS The follow-up rate was 11% (154 out of 1,356 donors), only 19% of whom were followed by nephrologists. Blood pressure had increased from 113/75 to 116/77 mm Hg (P < .01), urinary protein excretion after donation did not increase, and renal function was well preserved after donor nephrectomy. However, 33 patients (21.4%) showed a decreased eGFR of <60 mL/min/1.73 m(2), and 3 donors developed end-stage renal disease that required renal replacement therapy. CONCLUSIONS The follow-up rate of living donors after donation was low, and we observed an increased risk of developing chronic kidney disease after donation.
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Affiliation(s)
- S H Kim
- Department of Internal Medicine, Chung-Ang University, Seoul, Korea
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Sun IO, Hong YA, Kim HG, Park HS, Choi SR, Chung BH, Chun HJ, Choi BS, Park CW, Kim YS, Yang CW. Clinical usefulness of 3-dimensional computerized tomographic renal angiography to detect transplant renal artery stenosis. Transplant Proc 2012; 44:691-3. [PMID: 22483470 DOI: 10.1016/j.transproceed.2011.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate whether 3-dimensional computerized tomographic angiography (3D-CTA) is useful to detect transplant renal artery stenosis (TRAS). METHODS Fourteen patients with clinically suspected TRAS underwent color Doppler ultrasonography (CDU) and 3D-CTA before renal angiography. We compared 3D-CTA and CDU for accuracy based on the results of renal angiography. The safety of 3D-CTA was investigated by measuring the estimated glomerular filtration rate (eGFR) before and after the 3D-CTA examination. RESULTS The 10 men and 4 women who participated in this study showed a mean eGFR of 75 mL/min/1.73 m(2) (range 60-94). Of these, 9 patients were diagnosed with TRAS. 3D-CTA detected stenoses in all 9 patients, but CDU failed to detect it in 3, including, 2 with end-to-side arterial anastomoses, which may be more challenging to detect compared with end-to-end anastomoses. The stenotic area in 3D-CTA was similar to that detected by renal angiography (70 ± 12 vs 68 ± 11). The eGFR did not differ significantly before versus after the 3D-CTA examination; 72 ± 13 vs 69 ± 14 mL/min/1.73 m(2). CONCLUSIONS 3D-CTA was an effective safe method to detect renal artery stenosis among transplant recipients with an eGFR >60 mL/min/1.73 m(2).
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Affiliation(s)
- I O Sun
- Division of Nephrology, Department of Internal Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Yen HH, Yang CW, Su WW, Soon MS, Wu SS, Lin HJ. Oral versus intravenous proton pump inhibitors in preventing re-bleeding for patients with peptic ulcer bleeding after successful endoscopic therapy. BMC Gastroenterol 2012; 12:66. [PMID: 22681960 PMCID: PMC3503825 DOI: 10.1186/1471-230x-12-66] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Accepted: 05/24/2012] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND High dose intravenous proton pump inhibitor after endoscopic therapy for peptic ulcer bleeding has been recommended as adjuvant therapy. Whether oral proton pump inhibitor can replace intravenous proton pump inhibitor in this setting is unknown. This study aims to compare the clinical efficacy of oral and intravenous proton pump inhibitor after endoscopic therapy. METHODS Patients with high-risk bleeding peptic ulcers after successful endoscopic therapy were randomly assigned as oral lansoprazole or intravenous esomeprazole group. Primary outcome of the study was re-bleeding rate within 14 days. Secondary outcome included hospital stay, volume of blood transfusion, surgical intervention and mortality within 1 month. RESULTS From April 2010 to Feb 2011, 100 patients were enrolled in this study. The re-bleeding rates were 4% (2/50) in the intravenous group and 4% (2/50) in the oral group. There was no difference between the two groups with regards to the hospital stay, volume of blood transfusion, surgery or mortality rate. The mean duration of hospital stay was 1.8 days in the oral lansoprazole group and 3.9 days in the intravenous esomeprazole group (p > 0.01). CONCLUSION Patients receiving oral proton pump inhibitor have a shorter hospital stay. There is no evidence of a difference in clinical outcomes between oral and intravenous PPI treatment. However, the study was not powered to prove equivalence or non-inferiority. Future studies are still needed. TRIAL REGISTRATION NCT01123031.
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Affiliation(s)
- Hsu-Heng Yen
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
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Hwang JK, Kim YK, Kim SD, Park SC, Choi BS, Kim JI, Yang CW, Kim YS, Moon IS. Does donor kidney to recipient body weight ratio influence long-term outcomes of living-donor kidney transplantation? Transplant Proc 2012; 44:276-80. [PMID: 22310632 DOI: 10.1016/j.transproceed.2011.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study evaluated the effect of the donor kidney to recipient body weight (Kw/Rw) ratio on long-term graft function and survival. We investigated retrospectively whether there was any association between Kw/Rw ratio and long-term graft survival and function after a follow-up of >10 years. We studied a consecutive series of 123 adult-to-adult living kidney transplants. According to the Kw/Rw ratio, patients were divided into 3 groups: "low" (Kw/Rw <2.85; n = 29), "medium" (2.85 ≤ Kw/Rw < 4.04; n = 63), and "high" (≥4.04; n = 31). Among the 3 groups, the mean serum creatinine levels at 1 and 6 months as well as 1 year after transplantation were significantly lower among patients with a high Kw/Rw ratio than in those with a medium or low ratio, but serum creatinine levels at 3 and 5 years did not differ significantly (P = .394 and 0.620, respectively). Graft survival rates at 5 and 10 years after transplantation were significantly lower in the "low" group. We observed a significant association between Kw/Rw ratio and graft survival (P = .018). The Kw/Rw ratio is an important factor for long-term graft survival and early graft function. However, it did not significantly affect subsequent renal function.
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Affiliation(s)
- J K Hwang
- Division of Transplantation Surgery, Department of Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
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Yen HH, Chen YY, Yang CW, Liu CK, Soon MS. Clinical impact of multidetector computed tomography before double-balloon enteroscopy for obscure gastrointestinal bleeding. World J Gastroenterol 2012; 18:692-7. [PMID: 22363142 PMCID: PMC3281228 DOI: 10.3748/wjg.v18.i7.692] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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] [Received: 01/30/2011] [Revised: 04/26/2011] [Accepted: 05/02/2011] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the clinical impact of multidetector computed tomography (MDCT) before double-balloon endoscopy (DBE) for patients with obscure gastrointestinal bleeding (OGIB).
METHODS: A retrospective analysis of prospectively collected cases with DBE and MDCT for overt OGIB was conducted from April 2004 to April 2010 at Changhua Christian Hospital. We evaluated the clinical impact of MDCT on the subsequent DBE examinations and the diagnostic yields of both MDCT and DBE respectively.
RESULTS: From April 2004 to April 2010, a total of 75 patients underwent DBE for overt OGIB. Thirty one cases received MDCT followed by DBE for OGIB. The overall diagnostic yields of DBE and MDCT was 93.5% and 45.2%. The MDCT had a high diagnostic yield of tumor vs non-tumor etiology of OGIB (85.7% vs 33.3%, P = 0.014). Additionally, the choice of initial route of DBE was correct in those with a positive MDCT vs negative MDCT (100% vs 52.9%, P = 0.003).
CONCLUSION: This study suggests MDCT as a triage tool may identify patients who will benefit from DBE and aid the endoscopist in choosing the most efficient route.
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Yang CW, Yen HH. Endoscopic sonography in the diagnosis and treatment of a gastric wall abscess: a case report and review of the literature. J Clin Ultrasound 2012; 40:105-108. [PMID: 22228085 DOI: 10.1002/jcu.20780] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 10/15/2010] [Indexed: 05/31/2023]
Abstract
We report a case of a gastric wall abscess in a 50-year-old man who presented with epigastralgia and fever. Gastroscopy revealed a subepithelial lesion on the posterior wall of the gastric body into the antrum. A follow-up abdominal CT scan showed cystic lesions around the stomach. Endoscopic sonography helped to diagnose a gastric wall abscess. The gastric wall abscess was treated endoscopically with a needle knife incision for internal drainage. The patient was treated with antibiotics for 1 week and was discharged without complication. A follow-up endoscopy with endoscopic sonography 1 month later revealed complete resolution of the lesion.
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Affiliation(s)
- Chia-Wei Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
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72
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Affiliation(s)
- C W Yang
- Department of Gastroenterology, Changhua Christian Medical Center, Changhua, Taiwan
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73
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Affiliation(s)
- C W Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan.
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Jung SM, Yang CW, Oh JY, Cho CK, Kang PS, Lim YS, Jeong SJ, Kwon HU. Predicted effect-site concentration of propofol and sufentanil for gynecological laparoscopic surgery. Acta Anaesthesiol Scand 2011; 55:110-7. [PMID: 21039351 DOI: 10.1111/j.1399-6576.2010.02327.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 10/19/2022]
Abstract
BACKGROUND this study was to estimate the predicted effect-site concentration of propofol administered by a target-controlled infusion (TCI) for maintenance of anesthesia based on the bispectral (BIS) index as a measure of hypnosis in laparoscopic surgery. METHOD one-hundred and sixty unpremedicated patients undergoing gynecologic laparoscopy were assigned randomly to receive one of the target effect-site concentrations of propofol 2.0, 2.5, 3.0, 3.5 and 4.0 microg/ml during TCI with propofol and sufentanil. The dose-response relationship of propofol for the maintenance of adequate anesthesia based on BIS, movement and hemodynamic response was investigated using a fixed effect-site concentration of sufentanil (0.2 ng/ml). The BIS values, hemodynamic variables, time course during emergence and intraoperative awareness were also assessed. RESULTS the predicted effect-site propofol concentrations for adequate anesthesia at the skin incision in 50% (EC(50) ) and 95% (EC(95) ) of patients undergoing gynecologic laparoscopy were 2.2 and 3.7 microg/ml, respectively. The predicted propofol EC(50) and EC(95) to maintain adequate anesthesia in these patients were 2.6 microg/ml (95% CI 2.3-2.7 microg/ml) and 3.6 microg/ml (95% CI 3.3-4.0 microg/ml), respectively. The BIS values, effect-site concentration of propofol, hemodynamic data and time course during emergence and post-operative adverse events were comparable in each group. There were no reports of intraoperative awareness in the post-anesthetic care unit. CONCLUSION based on the anesthetic depth assessed by the clinical signs and BIS monitoring, the predicted effect-site propofol concentrations for the maintenance of anesthesia in patients undergoing gynecologic laparoscopy were similar in those administered adequate anesthesia at the skin incision during TCI.
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Affiliation(s)
- S M Jung
- Department of Anesthesiology and Pain Medicine, School of Medicine, Konyang University Hospital, Daejeon, Korea Department of Anesthesiology and Pain Medicine, School of Medicine, Inha University Hospital, Incheon, Korea
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75
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Lee YI, Park MH, Bae JH, Lee SE, Song KW, Kim TH, Lee YH, Yang CW. Loading behavior of Pt nanoparticles on the surface of multiwalled carbon nanotubes having defects formed via microwave treatment. J Nanosci Nanotechnol 2011; 11:479-483. [PMID: 21446480 DOI: 10.1166/jnn.2011.3216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We developed a simple and efficient method to load Pt nanoparticles (NPs) uniformly on defects generated in multiwalled CNTs (MWCNTs) without using reduction agents or organic reagents. Defects on the surfaces of MWCNTs were artificially generated by microwave treatment at various exposure times. Nucleation of Pt NPs occurs on the defect sites spontaneously due to an innate electropotential difference. Because of the correlation between defects and Pt NPs, we were able to control the size of Pt NPs by changing defect size, quantity and distribution, which was confirmed by Raman spectroscopy and TEM. After microwave treatment for 3 min, more uniform and smaller Pt NPs were observed. Also, the defects via microwave treatment make adhesion of Pt NPs stronger, which can be helpful to improve the reliability for applications. Finally, the methanol oxidation behavior of MWCNTs with Pt NPs was examined by cyclic voltammetry (CV).
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Affiliation(s)
- Y I Lee
- School of Advanced Materials Science and Engineering, Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University, Suwon 440-746, Korea
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Park MH, Lee JW, Lee YI, Lee JH, Hwang JH, Kim HK, Yang CW. Patterning of catalysts for the selective growth of carbon nanotubes using laser irradiation of nickel nitrate. J Nanosci Nanotechnol 2011; 11:602-605. [PMID: 21446506 DOI: 10.1166/jnn.2011.3226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We developed a simple method to produce patterned catalysts for the growth of carbon nanotubes (CNTs) on Si substrate using laser irradiation of Ni nitrate. We found that Ni nitrate can easily be decomposed into Ni oxide by KrF laser irradiation and that unexposed Ni nitrate can be removed using deionized (DI) water. Once we obtained patterned Ni oxide, we were able to synthesize multi-walled CNTs using a conventional thermal CVD. This new method does not require any photoresist or vacuum processes. Not only is the method compatible with low-temperature and large-area fabrication, it also significantly reduces the total processing steps required for conventional lithographic patterning technology. A detailed investigation of the decomposition process of this patterned catalyst and the microstructure of the patterned multi-walled CNTs was carried out using IR, SEM and TEM.
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Affiliation(s)
- M H Park
- School of Advanced Materials Science & Engineering and Center for Nanotubes & Nanostructured Composites, Sungkyunkwan University, Suwon 440-746, Korea
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Yang CW, Yen HH, Su WW, Chen YY, Soon MS. Profound transient thrombocytopenia associated with 90Yttrium microsphere therapy for inoperable hepatoma. South Med J 2010; 103:1264-8. [PMID: 21037524 DOI: 10.1097/smj.0b013e3181fa5ec7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The use of Yttrium microspheres to treat unresectable hepatoma is increasing worldwide. Therapeutically, Yttrium microspheres show promising increases in survival and tumor response, as well as acceptable toxicities. Here, we report on a 67-year-old man with hepatitis C-related advanced-stage hepatoma. This patient received selective internal radiation therapy (SIRT) using Yttrium microspheres (SIR-Spheres®). The patient displayed bone marrow suppression that resulted in a transient yet profound thrombocytopenia. To our knowledge, this is the first case of a hematologic complication as a consequence of the use of commercially available Yttrium microsphere devices.
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Affiliation(s)
- Chia-Wei Yang
- Department of Gastroenterology, Changhua Christian Hospital, Changhua County, Taiwan
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Yen HH, Chen YY, Yang CW, Soon MS. The clinical significance of jejunal diverticular disease diagnosed by double-balloon enteroscopy for obscure gastrointestinal bleeding. Dig Dis Sci 2010; 55:3473-8. [PMID: 20397046 DOI: 10.1007/s10620-010-1211-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Accepted: 03/21/2010] [Indexed: 12/18/2022]
Abstract
BACKGROUND Jejunal diverticular disease is a rare cause of gastrointestinal bleeding. The reported incidence of this disease is low in the studies of double-balloon enteroscopy. AIM The aim of this study was to evaluate the clinical features and management of jejunal diverticular disease, diagnosed by double-balloon enteroscopy, at our institution. METHOD This was a retrospective study of patients with jejunal diverticular disease conducted from April 2004 to September 2009 at Changhua Christian Hospital. We evaluated the clinical significance of jejunal diverticular disease and the outcome of endoscopic treatment for jejunal diverticular bleeding. RESULTS From April 2004 to September 2009, a total of 55 patients underwent double-balloon enteroscopy due to obscure gastrointestinal bleeding. Fifteen of these patients were diagnosed with jejunal diverticular disease (8 men and 7 women, mean age 71 years). Four patients were found to have a single diverticulum. Gastrointestinal bleeding was attributed to jejunal diverticular disease in 12 patients. Six patients received endoscopic treatment in order to achieve hemostasis. One patient received emergency surgery due to uncontrolled bleeding. CONCLUSIONS To our knowledge, this is the first study reporting the clinical significance of jejunal diverticular disease diagnosed by double-balloon enteroscopy. We found that obscure GI bleeding was attributed significantly to jejunal diverticular disease.
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Affiliation(s)
- Hsu-Heng Yen
- Endoscopy Center, Department of Gastroenterology, Changhua Christian Hospital, 135 Nanhsiao Street, Changhua 500, Taiwan.
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Park JM, Choi MG, Kim SW, Chung IS, Yang CW, Kim YS, Jung CK, Lee KY, Kang JH. Increased incidence of colorectal malignancies in renal transplant recipients: a case control study. Am J Transplant 2010; 10:2043-50. [PMID: 20883538 DOI: 10.1111/j.1600-6143.2010.03231.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This study was to evaluate the frequency of colorectal neoplasia in renal transplant recipients and to investigate the association with Epstein-Barr virus (EBV) and cytomegalovirus (CMV) infection. We compared the frequency of colorectal neoplasia among renal transplant recipients with that of the healthy subjects. Specimens of colorectal neoplasia were examined for EBV and CMV using in situ hybridization and immunohistochemistry, respectively. Of 796 renal transplantation cohorts, 315 were enrolled. The frequency of colorectal neoplasia among the patients was 22.9%. Compared with the healthy subjects, the odds ratio (OR) for advanced adenoma was 3.32 (95% CI, 1.81-6.10). The frequency of cancer among the patients was 1.9% (OR, 12.0; 95% CI, 1.45-99.7). A long interval between transplantation and colonoscopy was a significant factor in the development of advanced colorectal neoplasia. EBV positivity was detected in 30.6% of colorectal neoplasia specimens from renal transplant recipients, which was higher than that for the controls (p = 0.002). CMV was not detected in any lesions of patients or controls. In conclusion, renal transplant recipients have a significantly increased risk of advanced colorectal neoplasia. EBV was more frequently found in specimens of advanced colorectal neoplasm obtained from the renal transplant recipients.
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Affiliation(s)
- J M Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Chou KC, Yang CW, Yen HH. Rare gastric glomus tumor causing upper gastrointestinal bleeding, with review of the endoscopic ultrasound features. Endoscopy 2010; 42 Suppl 2:E58-9. [PMID: 20157891 DOI: 10.1055/s-0029-1243827] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- K C Chou
- Department of Gastroenterology, Changhua Christian Medical Center, Changhua, Taiwan
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Yang CW, Chen YY, Yen HH, Soon MS. Successful double balloon enteroscopy treatment for bleeding jejunal diverticulum: a case report and review of the literature. J Laparoendosc Adv Surg Tech A 2010; 19:637-40. [PMID: 19489675 DOI: 10.1089/lap.2009.0157] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In this article, we report a case study of a 54-year old man who presented with massive gastrointestinal bleeding. Esophagogastroduodenoscopy and colonoscopy had been performed in another hospital, but the location of the bleeding could not be identified, and the patient was transferred to our hospital. An initial abdominal computed tomography scan showed only a large blood clot in the small bowel and colon, with duodenojejunal diverticulosis. Emergent angiography was performed due to persistent active bleeding. Active bleeding from the jejunum was found, and the patient received a double balloon enteroscopy, which disclosed active bleeding in one of the jejunal diverticula. Two hemoclips were applied to treat the Dieulafoy's lesion within the diverticulum. The patient had no bleeding during the month following treatment. Bleeding of the jejunal diverticulum is a rare clinical condition, and only a few cases have been reported in the literature with successful endoscopic treatment. A short review of the current methods of diagnosis and treatment of this rare disorder is provided.
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Affiliation(s)
- Chia-Wei Yang
- Endoscopy Center, Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
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Song HK, Han DH, Song JH, Ghee JY, Piao SG, Kim SH, Yoon HE, Li C, Kim J, Yang CW. Influence of sirolimus on cyclosporine-induced pancreas islet dysfunction in rats. Am J Transplant 2009; 9:2024-33. [PMID: 19624561 DOI: 10.1111/j.1600-6143.2009.02751.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This study was performed to investigate the effect of sirolimus (SRL) on cyclosporine (CsA)-induced pancreatic islet dysfunction in rats. Three separate studies were performed. First, diabetogenic effect of SRL was evaluated with three different doses (0.15, 0.3 and 0.6 mg/kg). Second, rats were treated with SRL (0.3 mg/kg) with or without CsA (15 mg/kg) for 4 weeks. Third, rats were treated with CsA for 4 weeks, and then switched to SRL for 4 weeks. The effect of SRL on CsA-induced pancreatic islet dysfunction was evaluated by an intraperitoneal glucose tolerance test, plasma insulin concentration, HbA1c level, HOMA-R index, immunohistochemistry of insulin and pancreatic beta islet cell mass. The SRL treatment increased blood glucose concentration in a dose-dependent manner. The combined treatment with SRL and CsA increased blood glucose concentration, Hemoglobin A1c (HbA1c) level, HOMA-R [fasting insulin (mU/mL) x fasting glucose (mmol/L)]/22.5] index and decreased plasma insulin concentration, immunoreactivity of insulin and pancreatic beta islet cell mass compared with rats treated with CsA. CsA withdrawal for 4 weeks improved pancreatic beta-cell function and structure. However, conversion from CsA to SRL further increased blood glucose levels compared with the rats converted from vehicle to SRL. The results of our study demonstrate that SRL is diabetogenic and aggravates CsA-induced pancreatic islet dysfunction.
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Affiliation(s)
- H K Song
- Transplant Research Center, Division of Nephrology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
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Kim Y, Jo MH, Kim TC, Yang CW, Kim JW, Hwang JS, Noh DY, Kim ND, Chung JW. Coarsening kinetics of a spinodally decomposed vicinal Si(111) surface. Phys Rev Lett 2009; 102:156103. [PMID: 19518655 DOI: 10.1103/physrevlett.102.156103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Indexed: 05/27/2023]
Abstract
The coarsening kinetics of the stepped-and-terrace groove structure formed on a vicinal Si(111) surface was investigated by in-situ synchrotron x-ray scattering. The time evolution of the groove period L at various temperatures below the (1 x 1)-to-(7 x 7) transition falls onto a universal curve when the annealing time is scaled by a scale factor. Distinctive stages of spinodal decomposition, coarsening, and saturation are identified in the evolution of the groove period. L increases following a power law, L approximately t;{n} with n = 1/6 and 0.29 in the initial stage and the late stage of coarsening, respectively. The initial coarsening proceeds via collective motion of step bunches while the late stage is dominated by the diffusion of individual steps.
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Affiliation(s)
- Yongsam Kim
- Department of Materials Science and Engineering, Center for Extreme Light Applications, Gwangju Institute of Science and Technology, Gwangju, Korea
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Abstract
Fenton process has been shown to be very successful to remove dyes from water. However, the influence of other constituents in dyeing industry wastewater, such as Sodium Dodecyl Sulphate (SDS) surfactants, has not been investigated. In this study, the effect of SDS surfactant on the kinetics of Methyl Orange degradation undergoing Fenton process was investigated. Results show that Methyl Orange degradation rate decreased as SDS concentration increased, which was attributed to the consumption of hydroxyl radicals (OH) by surfactants and the formation of Methyl Orange-SDS complex. No evidence was found that the Methyl Orange degradation pathway was affected by the presence of SDS. The kinetics modelling indicates the reaction was the first-order reaction to Methyl Orange.
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Affiliation(s)
- C W Yang
- School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
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Wang SY, Yang CW, Liao JW, Zhen WW, Chu FH, Chang ST. Essential oil from leaves of Cinnamomum osmophloeum acts as a xanthine oxidase inhibitor and reduces the serum uric acid levels in oxonate-induced mice. Phytomedicine 2008; 15:940-945. [PMID: 18693097 DOI: 10.1016/j.phymed.2008.06.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The xanthine oxidase (XOD) inhibitory activity and anti-hyperuricemia effect in mice of Cinnamomum osmophloeum, which is an endemic tree in Taiwan, were evaluated in this study. The results demonstrated that the essential oil of C. osmophloeum leaves presented the strongest XOD inhibition activity (IC(50)=16.3 μg/ml); however, no significant XOD inhibition activities were found in ethanolic and hot water extracts. Furthermore, among the main compounds of essential oil, the cinnamaldehyde exhibited the potent XOD inhibition activity with an IC(50)=8.4 μg/ml. Besides, the reducing serum uric acid levels in oxonate-induced mice by cinnamaldehyde were further investigated. The hyperuricemic mice were oral administrated cinnamaldehyde at a dosage of 150 mg/kg, the uric acid value in serum was reduced from 5.25±0.63 to 2.10±0.04 mg/dl, the levels of serum uric acid in mice was lowered down by 84.48% as compared to the hyperuricemic control group. Based on the results obtained in this study, cinnamaldehyde may be a potential lead compound for developing the pharmaceutic for anti-hyperuricemia agent.
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Affiliation(s)
- S Y Wang
- Department of Forestry, National Chung-Hsing University, Taichung 402, Taiwan.
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86
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Song WY, Shin TI, Kang SM, Kim SW, Yang JH, Park MH, Yang CW, Yoon DH. Controllable dimension of ZnO nanowalls on GaN/c-Al2O3 substrate by vapor phase epitaxy method. J Nanosci Nanotechnol 2008; 8:4783-4786. [PMID: 19049108 DOI: 10.1166/jnn.2008.ic52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Vertically well-aligned ZnO nanowalls were successfully synthesized at 950-1050 degrees C. Ar gas was introduced into the furnace at a flow rate of 2000-2500 sccm. An Au thin film with a thickness of 3 nm was used as a catalyst. The ZnO nanowalls were successfully grown on the substrate and most of them had nearly the same thickness and were oriented perpendicular to the substrate. The morphology and chemical composition of the ZnO nanowalls were examined as a function of the growth conditions examined. It was found that the grown ZnO nanowalls have a single-crystalline hexagonal structure and preferred c-axis growth orientation based on the X-ray diffraction and high-resolution transmission electron microscope measurements. The room temperature photoluminescence showed a strong free-exciton emission band with negligible deep level emission, indicating the high optical property of our ZnO nanowall samples.
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Affiliation(s)
- W Y Song
- Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 440-746, Korea
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87
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Yang CW, Hsia TH, Chen CC, Lai CK, Liu RS. Synthesis and Columnar Mesophase of Fluorescent Liquid Crystals Bearing a C2-Symmetric Chiral Core. Org Lett 2008; 10:4069-72. [DOI: 10.1021/ol801561b] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chia-Wei Yang
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC, and Department of Chemistry, National Central University, Chungli, Taiwan, ROC
| | - Tsai-Hua Hsia
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC, and Department of Chemistry, National Central University, Chungli, Taiwan, ROC
| | - Cheng-Chung Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC, and Department of Chemistry, National Central University, Chungli, Taiwan, ROC
| | - Chung-Kung Lai
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC, and Department of Chemistry, National Central University, Chungli, Taiwan, ROC
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC, and Department of Chemistry, National Central University, Chungli, Taiwan, ROC
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88
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Kim SH, Oh EJ, Kim MJ, Park YJ, Han K, Yang HJ, Kim JY, Choi BS, Yang CW, Kim YS, Bang BK. Pretransplant donor-specific interferon-gamma ELISPOT assay predicts acute rejection episodes in renal transplant recipients. Transplant Proc 2008; 39:3057-60. [PMID: 18089321 DOI: 10.1016/j.transproceed.2007.06.080] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Revised: 05/03/2007] [Accepted: 06/21/2007] [Indexed: 11/16/2022]
Abstract
Interferon (IFN)-gamma enzyme-linked immunosorbent spot (ELISPOT) assay is a powerful tool for measuring the frequency of alloantigen-specific T cells, reflecting cellular immunity. We correlated the pretransplant frequencies of donor-specific and third-party-specific IFN-gamma ELISPOT tests, with the posttransplant outcomes of 45 recipients of living donor renal transplantations. The mean frequency of pretransplant donor-specific ELISPOT was significantly greater among patients with acute rejection episodes (ARE) than those without ARE (18.0 [12 to 50] versus 8.8 [5 to 30.4]) spots per 200,000 peripheral blood lymphocytes (PBLs; P=.024). A cutoff level of 12 spots per 200,000 PBLs on the donor-specific ELISPOT identified an ARE-positive patient with a sensitivity of 81.8% and a specificity of 64.7%. The recipients with pretransplant donor-specific ELISPOT+showed higher serum creatinine levels and lower glomerular filtration rate (GFR) at 6 posttransplant months (P<.05). Although the pretransplant third-party-specific ELISPOT results correlated with the donor-specific ELISPOT results (r=.783; P<.001), there was no significant difference in the third-party ELISPOT results between the ARE-positive and ARE-negative recipients. In conclusion, an analysis of pretransplant donor-specific IFN-gamma ELISPOT may identify the posttransplant risk of developing ARE and displaying decreased GFR at 6 months.
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Affiliation(s)
- S H Kim
- Department of Internal medicine, College of medicine, The Catholic University of Korea, Seoul, Korea
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89
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90
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Affiliation(s)
- Yang-Yuan Chen
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan, ROC
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91
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Affiliation(s)
- Yang-Yuan Chen
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan, ROC
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92
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Affiliation(s)
- Maw-Soan Soon
- Department of Gastroenterology, Changhua Christian Medical Center, Changhua, Taiwan, ROC
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93
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Yang CY, Lee TM, Yang CW, Chen LR, Wu MC, Lui TS. In vitro andin vivo biological responses of plasma-sprayed hydroxyapatite coatings with posthydrothermal treatment. J Biomed Mater Res A 2007; 83:263-71. [PMID: 17415765 DOI: 10.1002/jbm.a.31246] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [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: 11/07/2022]
Abstract
This study was undertaken to evaluate the effect of post-hydrothermal treatment on the biological responses of the plasma-sprayed hydroxyapatite (HA)-coated Ti-6Al-4V implant system both in vitro and in vivo. After hydrothermal treatment, the HA coating (HAC) shows the high mechanical strength and indices-of-crystallinity, denser microstructure, lower concentrations of amorphous and impurity phases, when compared with the as-sprayed HAC. The in vitro cell-culture studies, using UMR106 osteoblast-like cell, demonstrated no signifiacnt cell growth on both surface of as-sprayed and hydrothermal-treated HACs during 10-day culture. The in vivo studies, using the transcortical implant model in the femora of goats, evaluated the histological responses of two coatings. After 6 week of implantation, using backscattered electron images, no substantial histological variations in the extents of new bone apposition and new bone healing between the two HACs were observed. However, the as-sprayed HAC, owing to the dissolution induced the granular particles dissociated from the HAC, showed the statically lower extent of new bone apposition than hydrothermal-treated HAC at 12 weeks. The results suggest that hydrothermal treatment could be used to improve the mechanical strength, crystallinity, and phase composition of HAC, which are important factors of long-term fixation and stability of implant. Besides, the treated HAC could also achieve the initial fixation of implant in clinical use.
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Affiliation(s)
- C Y Yang
- Department of Orthopaedics, National Cheng Kung University, Tainan 701, Taiwan
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94
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Yang CW, Oh EJ, Lee SB, Moon IS, Kim DG, Choi BS, Park SC, Choi YJ, Park YJ, Han K. Detection of Donor-Specific Anti-HLA Class I and II Antibodies Using Antibody Monitoring System. Transplant Proc 2006; 38:2803-6. [PMID: 17112834 DOI: 10.1016/j.transproceed.2006.09.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2006] [Indexed: 11/27/2022]
Abstract
The antibody monitoring system (AMS, GTI Inc) is a solid enzyme-linked immunosorbent assay (ELISA) crossmatch test for the detection of immunoglobulin G (IgG) antibody to donor-specific solubilized HLA class I and class II antigens. The objective of this study was to compare the results of the AMS assay with donor-specific anti-HLA IgG antibodies (DS-HLA Abs), as determined by ELISA panel reactive antibody (PRA) and the flow cytometric crossmatch test (FCXM). A total of 107 sera were screened for the presence of HLA Abs by ELISA PRA (LAT-M, One-Lambda Inc), the DS-HLA Abs were determined in 34 serum samples (31.8%) by an ELISA panel (LAT class I and class II, One-Lambda Inc) and FCXM. The FCXM and AMS assays were performed with matched lymphocytes from 56 donors. There was a significant degree of concordance (89.7%) between the two tests (P < .001). The sensitivity, specificity, positive predictive value, and negative predictive value of AMS assay to detect DS-HLA Abs was 88.2%, 94.5%, 88.2%, and 94.5%, respectively. The AMS is a simple, objective test, which has several advantages over the cell-based crossmatch test, such as elimination of non-HLA antibody reactivity, elimination of non-donor-specific antibody reactivity, no need for viable cells, and preparation of the donor's HLA antigens in advance. In summary, this study suggested that AMS may be useful as a supportive crossmatch test or as a monitoring test after transplantation to detect class I or class II DS-HLA Abs.
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Affiliation(s)
- C W Yang
- Department of Laboratory Medicine, College of Medicine, the Catholic University, Seoul, Korea
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95
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Abstract
Developments in tissue engineering over the past decade have offered promising future for the repair and reconstruction of damaged tissues. To regenerate three dimensional and weight-bearing implants, advances in biomaterials and manufacturing technologies prompted cell cultivations with natural or artificial scaffolds, in which cells are allowed to proliferate, migrate, and differentiate in vitro. In this article, we develop a mathematical model for cell growth in a porous scaffold. By treating the cell-scaffold construct as a porous medium, a continuum model is set up based on basic principles of mass conservation. In addition to cell growth kinetics, we incorporate cell diffusion in the model to describe the effects of cell random walks. Computational results are compared to experimental data found in the literature. With this model, we are able to investigate cell motility, heterogeneous cell distributions, and non-uniform seeding for tissue engineering applications. Results show that random walks tend to enhance uniform cell spreads in space, which in turn increases the probabilities for cells to acquire nutrients; therefore random walks are likely to be a positive contribution to the overall cell growth on scaffolds.
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Affiliation(s)
- C A Chung
- Department of Mechanical Engineering, National Central University, Jhongli, Taiwan 320, ROC.
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96
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Taur JS, Lee GH, Tao CW, Chen CC, Yang CW. Segmentation of psoriasis vulgaris images using multiresolution-based orthogonal subspace techniques. ACTA ACUST UNITED AC 2006; 36:390-402. [PMID: 16602598 DOI: 10.1109/tsmcb.2005.859935] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 11/07/2022]
Abstract
In this paper, a method is proposed for the segmentation of color images using a multiresolution-based signature subspace classifier (MSSC) with application to psoriasis images. The essential techniques consist of feature extraction and image segmentation (classification) methods. In this approach, the fuzzy texture spectrum and the two-dimensional fuzzy color histogram in the hue-saturation space are first adopted as the feature vector to locate homogeneous regions in the image. Then these regions are used to compute the signature matrices for the orthogonal subspace classifier to obtain a more accurate segmentation. To reduce the computational requirement, the MSSC has been developed. In the experiments, the method is quantitatively evaluated by using a similarity function and compared with the well-known LS-SVM method. The results show that the proposed algorithm can effectively segment psoriasis images. The proposed approach can also be applied to general color texture segmentation applications.
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Affiliation(s)
- J S Taur
- Department of Electrical Engineering, National Chung Hsing University, Taichung, Taiwan, ROC
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97
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Shen HC, Tang JM, Chang HK, Yang CW, Liu RS. Short and Efficient Synthesis of Coronene Derivatives via Ruthenium-Catalyzed Benzannulation Protocol. J Org Chem 2005; 70:10113-6. [PMID: 16292850 DOI: 10.1021/jo0512599] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] TpRuPPh3(CH3CN)2PF6 (3 mol %) was very active in catalytic benzannulation of 1-phenyl-2-ethynylbenzenes in dichloroethane (60 degrees C, 36 h) to afford phenanthrene in 95% yield. This method is applicable to the synthesis of various polycyclic aromatic hydrocarbons via two- and four-fold benzannulations, including various substituted coronene derivatives (53-86% yields) using this catalyst at a moderate loading (10 mol %).
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Affiliation(s)
- Hung-Chin Shen
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC 30043
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98
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Abstract
Microscopic cerebral arterial air embolism (CAAE) has been described in many patients undergoing cardiac surgery as well as other invasive diagnostic and therapeutic procedures. However, massive CAAE is rare. We report a 42-year-old woman who initially presented with thalamic and basal ganglia hemorrhages. Shortly after a radial arterial catheter was inserted, the patient suffered a generalized seizure and CT demonstrated intra-arterial air in bilateral cerebral hemispheres.
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Affiliation(s)
- C W Yang
- Department of Radiology, Northwestem University Feinberg School of Medicine, Chicago, IL 60611, USA.
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99
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Palaniappan RUM, Chang YF, Chang CF, Pan MJ, Yang CW, Harpending P, McDonough SP, Dubovi E, Divers T, Qu J, Roe B. Evaluation of lig-based conventional and real time PCR for the detection of pathogenic leptospires. Mol Cell Probes 2004; 19:111-7. [PMID: 15680212 DOI: 10.1016/j.mcp.2004.10.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Revised: 10/05/2004] [Accepted: 10/05/2004] [Indexed: 11/19/2022]
Abstract
Leptospirosis is globally important infectious disease affecting almost all mammals. Pathogenic Leptospira encodes immunoglobulin-like protein (Lig) that is found to express only during infection. We report the development of conventional and real time PCR assays targeting lig genes of leptospires for the early diagnosis of leptospirosis. Sensitivity of the newly designed Lig1/Lig2 primers for conventional PCR was compared with previously published primers LP1/LP2 and G1/G2. G1/G2 primers amplified the target DNA from all the serovars including non-pathogenic Leptospira biflexa whereas LP1/LP2 and Lig1/Lig2 primers amplified only pathogenic leptospires. Diagnostic PCR assay was also developed for the detection of pathogenic Leptospira interrogans in urine samples. We obtained the highest sensitivity in PCR using our Lig1/Lig2 primers with a detection of 6 leptospires. A rapid and sensitive lig-based real time PCR assay was also developed with a detection range of 10-10(7) gene copies. To evaluate the early diagnosis for leptospirosis, we compared the culture with conventional and real time PCR for the detection of spirochetes in experimentally infected hamsters during a time-course study. Culture of infected hamster tissues detected the presence of leptospires from Day 2 of infection but not on the day of infection or Day 1, whereas conventional PCR and real time PCR detected the leptospires from the day of infection. Hence, conventional and real time PCR with lig primers would be a sensitive and rapid tool for early diagnosis of leptospirosis.
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100
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Lyu SC, Lee TJ, Yang CW, Lee CJ. Synthesis and characterization of high-quality double-walled carbon nanotubes by catalytic decomposition of alcohol. Chem Commun (Camb) 2003:1404-5. [PMID: 12841263 DOI: 10.1039/b302322b] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis of high-quality double-walled carbon nanotubes without defects by catalytic decomposition of alcohol over an Fe-Mo/Al2O3 catalyst; the synthesized DWNTs have outer diameters in the range of 1.52-3.54 nm and an average interlayer distance of 0.38 nm between graphene layers.
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Affiliation(s)
- S C Lyu
- Department of Nanotechnology, Hanyang University, Seoul 133-791, Korea
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