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Lin TC, Lin KJ, Chiang YJ, Chu SH, Liu KL, Lin CT, Pan PY, Chen SY, Wang JC, Wang HH. Prediction of Early Kidney Transplant Graft Outcome: Insulin Resistance Index. Transplant Proc 2024; 56:550-553. [PMID: 38395658 DOI: 10.1016/j.transproceed.2024.01.033] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/16/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND New-onset diabetes after transplantation and increased insulin resistance have both been shown to affect graft performance and survival after kidney transplantation. Thus, we aimed to evaluate the predictive roles of different insulin resistance indices on early graft function in kidney transplant recipients. MATERIALS AND METHODS We conducted a retrospective analysis of non-diabetic patients who received kidney transplantation between January 1, 2018 and December 31, 2021. The primary outcome was the predictive role of different insulin resistance indices on early graft function of serum creatinine level and estimated glomerular filtration rate at 1, 3, 6, and 12 months. The secondary outcome analyzed was the possible clinical predictive factors for poor kidney graft function at 12 months. RESULTS Among 123 kidney transplantation patients, stratification with homeostatic model assessment for insulin resistance showed no significant difference in kidney graft function outcome at 1, 3, 6, and 12 months. However, patients with a higher insulin-to-glucose ratio exhibited a significantly higher serum creatinine level at 3 and 6 months and a significantly lower estimated glomerular filtration rate level at 3, 6, and 12 months. Using multivariate logistic regression analysis, patients with a higher insulin-to-glucose ratio were associated with a poorer kidney graft function 12 months after transplantation. CONCLUSION Patients with a higher baseline insulin resistance with an insulin-to-glucose ratio ≥of 0.092 exhibited a significantly worse early kidney graft function. Thus, with the identification of patients with increased insulin resistance, early intervention, and preventive measures can be implemented to enhance graft performance further.
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Affiliation(s)
- Tsu-Chen Lin
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Kuo-Jen Lin
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan
| | - Yang-Jen Chiang
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan
| | - Sheng-Hsien Chu
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan
| | - Kuan-Lin Liu
- School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan; Department of Urology, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chih-Te Lin
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Pai-Yen Pan
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan
| | - Sy-Yuan Chen
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan
| | - Jui-Chung Wang
- Department of Electrical Engineering, University of Southampton Southampton, United Kingdom
| | - Hsu-Han Wang
- Department of Urology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Transplant Institute, Taoyuan, Taiwan.
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Lin TC, Chu CN, Chiou YR, Tsai WN, Liao XP, Su MH, Lin CW, Liang JA. Designing Patient-Centered Health Education Materials for Radiation Dermatitis in Breast Cancer Patients: A Pilot Study and Single-Center Clinical Trial. Int J Radiat Oncol Biol Phys 2023; 117:e408. [PMID: 37785354 DOI: 10.1016/j.ijrobp.2023.06.1549] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) For breast cancer patients receiving radiotherapy (RT), radiation dermatitis is the most commonly experienced discomfort. However, patients usually do not participate in the design of health education materials regarding radiation dermatitis. We designed a pilot study to investigate the unmet need of breast cancer patients who would be receiving RT at our department and created a patient-centered educational video. We initiated a single-arm clinical trial to evaluate the effectiveness of the video in improving patient and their family's knowledge of radiation dermatitis, alleviating their anxiety, and helping patients improve self-care skills during RT course. MATERIALS/METHODS The pilot study was executed in a radiation oncology department of a tertiary medical center in Taiwan. We designed a questionnaire to explore new breast cancer patients' idea of a comprehensive pre-RT health education. Enrolled patients would fill out an electronic questionnaire during their first visit at our outpatient clinic. They were asked to select at most two of the following items they considered most important for pre-RT health education: (1) The mechanism behind RT; (2) Self-care skills for irradiated skin; (3) Activities to be avoided during RT course; (4) The toxicity grading of radiation dermatitis. Given the above information, we created a 4-minute video set in a clinical scenario of a patient receiving pre-RT health education from a nurse. A single-arm clinical trial (IRB approval number: CMUH111-REC2-121) is currently recruiting. The video was launched on YouTube (Link: https://youtu.be/O1uTXpS_ed0) to give patients easy access to the video. Enrolled patients would complete Skindex-16 survey (translated into Chinese) at 3 timepoints: during their first visit at our clinic, in the middle of RT course, and at the first post-RT follow-up visit. Cronbach's alpha test was applied to determine the internal consistency of the questionnaires. RESULTS The pilot study included 19 patients with an average age of 46.6 (range: 34 to 69) years old. All patients' primary language was Chinese Mandarin. Most patients (84%) received at least secondary education. We found by surprise that RTOG skin toxicity grading was considered very important for most patients (79%), while less than half (42%) found the mechanism behind RT important. The internal validity of the Chinese version of Skindex-16 was good (Cronbach's alpha score = 0.87). For the recruiting trial, we have enrolled 10 patients and planned to close the trial upon enrolling 50 participants. The study result should be available before August 2023. CONCLUSION We suggest to actively involve patients in designing health education materials for patient-centered care. Toxicity grading of radiation dermatitis should be included in pre-RT health education for breast cancer patients. Whether the educational video helps reduce patients' anxiety and the incidence of severe radiation dermatitis will soon be answered by our ongoing clinical trial.
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Affiliation(s)
- T C Lin
- Division of Radiation Oncology, Department of Oncology, China Medical University Hospital, Taichung, Taichung, Taiwan
| | - C N Chu
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Y R Chiou
- China Medical University Hospital, Taiwan, Taichung, Taiwan
| | - W N Tsai
- China Medical University Hospital, Taichung, Taiwan
| | - X P Liao
- China Medical University Hospital, Taichung, Taiwan
| | - M H Su
- China Medical University Hospital, Taichung, Taiwan
| | - C W Lin
- China Medical University Hospital, Taichung, Taiwan
| | - J A Liang
- China Medical University Hospital, Taichung, Taiwan
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Lin TC, Hou CP, Hsu YC, Chen Y, Yu KJ, Shao IH, Hsieh ML. Can the Sandwich Method Be an Alternative Treatment Choice for BPH Patients With Large Prostates? Urology 2023; 176:137-142. [PMID: 36963671 DOI: 10.1016/j.urology.2023.02.043] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 03/26/2023]
Abstract
OBJECTIVE To compare the efficacy and safety of the sandwich method with GreenLight photoselective vaporization (GLPVP) and bipolar transurethral resection (B-TURP) with those of the enucleation method in patients with BPH and a prostate volume ≥ 80 g. METHODS Patients with BPH who underwent either the sandwich method with GLPVP and B-TURP or the enucleation method between 2014 and 2021 were included in the analysis. The primary outcome was the comparison of uroflowmetry results between the 2 groups. Safety analysis of the complication rates was also compared. RESULTS The cohort included 55 patients in the sandwich group and 41 patients in the enucleation group. In the efficacy analysis, both groups showed comparable uroflowmetry results, except for a higher postoperative average flow rate in the enucleation group. Regarding perioperative parameters, the sandwich method required a longer operating time, and the enucleation group had a higher incidence of manual Foley irrigation. Both groups demonstrated similar postoperative complications. CONCLUSION The sandwich method exhibited comparable efficacy and safety to the enucleation method in patients with BPH with a prostate volume ≥ 80 g. Thus, for surgeons who are familiar with GLPVP and B-TURP, the sandwich method may be an alternative surgical approach for BPH patients with large prostates.
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Affiliation(s)
- Tsu-Chen Lin
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chen-Pang Hou
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Healthcare Management, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Yu-Chao Hsu
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu Chen
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; School of Medicine, National Tsing Hua University, Hsinchu, Taiwan
| | - Kai-Jie Yu
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - I-Hung Shao
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ming-Li Hsieh
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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Wu MY, Lo WC, Wu YC, Lin TC, Lin CH, Wu MS, Tu YK. The Incidence of Contrast-Induced Nephropathy and the Need of Dialysis in Patients Receiving Angiography: A Systematic Review and Meta-Analysis. Front Med (Lausanne) 2022; 9:862534. [PMID: 35573008 PMCID: PMC9091353 DOI: 10.3389/fmed.2022.862534] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
ObjectivesThe risk of dialysis following contrast exposure is unclear. We aimed to examine the overall risk of contrast induced nephropathy and the need of dialysis based on a systematic review with random-effects meta-analysis.MethodsWe searched the electronic database including PubMed, Medline, Embase, and Cochrane Library from inception to 31 October, 2020 with predetermined search term to identify relevant studies. Observational studies investigating the association between contrast induced nephropathy after angiography and the need of dialysis were included, and summary risks were estimated. Two independent reviewers extracted the data, followed with random effects model to calculate the overall pooled incidence of contrast induced nephropathy and the need of dialysis after angiography. Subgroup-analysis and meta-regression were performed to assess heterogeneity of incidence across studies.ResultsOf 2,243 identified articles, 259 met our inclusion criteria were included in the meta-analysis after screening. Pooled effect estimates had the following summary incidence proportion for contrast induced nephropathy after angiography: 9.06% (95% CI: 8.53–9.58%; derived from 120 studies) and 0.52% (95% CI: 0.37–0.70%; derived from 110 studies) for the need of dialysis, respectively. The stratified summary incidence proportion of contrast induced nephropathy after contrast administration via intra-arterial route was 9.60% (95% CI: 9.0–10.2%; derived from 106 studies) and was 0.6% (95% CI: 0.40–0.80%; derived from 100 studies) for the need of dialysis, respectively. Our meta-regressions found that the amount of contrast medium exposure was associated with contrast-induced nephropathy.ConclusionThe potential risk of dialysis needs to be communicated to patients undergoing procedures requiring contrast, especially via intra-arterial exposure.Systematic Review Registration[https://reurl.cc/8Wrlry], identifier [CRD42020170702].
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Affiliation(s)
- Mei-Yi Wu
- College of Public Health, Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
- Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan
| | - Wei-Cheng Lo
- College of Public Health, Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
- Master Program in Applied Epidemiology, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Yun-Chun Wu
- College of Public Health, Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
| | - Tsu-Chen Lin
- Division of Urology, Department of Surgery, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
- Department of Orthopedics, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Chun-Hung Lin
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Mai-Szu Wu
- Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan
| | - Yu-Kang Tu
- College of Public Health, Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan
- Department of Dentistry, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- *Correspondence: Yu-Kang Tu,
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Lin TC, Chang PC, Shao IH, Chen Y, Huang HC, Hsu YC, Hsieh ML. Efficacy and Safety of the Sandwich Method in Patients with Benign Prostate Hyperplasia: Bipolar Transurethral Resection with GreenLight Vaporization. J Clin Med 2022; 11:jcm11051276. [PMID: 35268367 PMCID: PMC8910987 DOI: 10.3390/jcm11051276] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/19/2022] [Accepted: 02/24/2022] [Indexed: 02/01/2023] Open
Abstract
Benign prostate hyperplasia (BPH) refers to the nonmalignant enlargement of the transition zone of the prostate gland. While holmium laser enucleation of the prostate and open simple prostatectomy are effective in the management of patients with large prostates, they have some limitations. Thus, this study aimed to analyze the efficacy and safety of the sandwich method of bipolar transurethral resection of the prostate (B-TURP) and GreenLight photoselective vaporization of the prostate (GLPVP) in patients with large prostates. Patients diagnosed with BPH who underwent the sandwich method with B-TURP and GLPVP from 2015 to 2020 were included. Efficacy analyses included the change in the uroflowmetry results in both group A (prostate volume < 80 g) and group B (prostate volume ≥ 80 g), and complication analyses included perioperative complications, early postoperative complications at three months and late postoperative complications at 12 months. The cohort comprised 188 and 44 patients in groups A and B, respectively. The prostate volume of groups A and B were 50.83 ± 14.14 g and 102.03 ± 19.36 g (p < 0.001), respectively. The peak (Qmax) and average (Qavg) flow rates were comparable between the two groups. The only significant difference noted was in the postoperative post-void residual (PVR) urine. Improvement was seen in all the variables including the Qmax, Qavg and PVR urine in each group. No patient experienced perioperative complications. Analysis of the overall one-year complication rate showed no significant difference between the two groups. The sandwich method of B-TURP and GLPVP may be feasible for the management of patients with large prostate.
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Affiliation(s)
- Tsu-Chen Lin
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
| | - Po-Chih Chang
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
| | - I-Hung Shao
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
| | - Yu Chen
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
| | - Hsin-Chieh Huang
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
| | - Yu-Chao Hsu
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
| | - Ming-Li Hsieh
- Division of Urology, Department of Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 333, Taiwan; (T.-C.L.); (P.-C.C.); (I.-H.S.); (Y.C.); (H.-C.H.); (Y.-C.H.)
- College of Medicine, Chang Gung University, Taoyuan City 333, Taiwan
- Correspondence:
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Lin CH, Chao CT, Wu MY, Lo WC, Lin TC, Wu MS. Use of mammalian target of rapamycin inhibitors in patient with autosomal dominant polycystic kidney disease: an updated meta-analysis. Int Urol Nephrol 2019; 51:2015-2025. [PMID: 31578673 DOI: 10.1007/s11255-019-02292-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 05/03/2019] [Accepted: 09/17/2019] [Indexed: 12/19/2022]
Abstract
PURPOSE Mammalian target of rapamycin (mTOR) inhibitors were previously considered a potential therapy for autosomal dominant polycystic kidney disease (ADPKD), but prior studies remained controversial about their efficacy. We performed an updated meta-analysis regarding the therapeutic and adverse effects of mTOR inhibitors in patients with ADPKD. METHODS We systematically searched Cochrane Library, PubMed, EMBASE, and Medline for randomized controlled trials (RCTs) comparing mTOR inhibitors to placebo in ADPKD patients up to August 2019. We calculated weighted mean differences (WMDs) for total kidney volume (TKV), estimated glomerular filtration rates (eGFRs), and weighted odds ratios (ORs) for treatment-related complications between the treatment and the placebo groups, using the random effects model. RESULTS We retrieved a total of 9 RCTs enrolling 784 ADPKD patients receiving rapamycin, sirolimus, or everolimus between 2009 and 2016. The WMDs of TKV and eGFR from baseline to the last measurement were - 31.54 mL (95% confidence interval [CI] - 76.79 to 13.71 mL) and 2.81 mL/min/1.73 m2 (95% CI - 1.85 to 7.46 mL/min/1.73 m2), respectively. Patients receiving mTOR inhibitors had a significantly increased risk of any adverse effects (OR 5.92, 95% CI 3.53-9.94), with the most common ones being aphthous stomatitis (OR 15.45, 95% CI 9.68-24.66) and peripheral edema (OR 3.49, 95% CI 1.31-9.27) compared to placebo users. CONCLUSIONS mTOR inhibitors did not significantly influence renal progression in patients with ADPKD, but were associated with a higher risk of complications. Whether mTOR inhibitors can be an add-on option or second-line agents remain undetermined.
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Affiliation(s)
- Chun-Hung Lin
- Department of Orthopedics, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Chia-Ter Chao
- Department of Internal Medicine, National Taiwan University Hospital BeiHu Branch, National Taiwan University College of Medicine, Taipei, Taiwan. .,Graduate Institute of Toxicology, National Taiwan University College of Medicine, No. 1, Section 1 Jen-Ai Rd., Taipei, 10051, Taiwan.
| | - Mei-Yi Wu
- Department of Nephrology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan.,Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.,Department of Primary Care Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan
| | - Wei-Cheng Lo
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Tsu-Chen Lin
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Mai-Szu Wu
- Department of Nephrology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan.,Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Lin TC, Hung LY, Chen YC, Lo WC, Lin CH, Tam KW, Wu MY. Effects of febuxostat on renal function in patients with chronic kidney disease: A systematic review and meta-analysis. Medicine (Baltimore) 2019; 98:e16311. [PMID: 31335677 PMCID: PMC6709169 DOI: 10.1097/md.0000000000016311] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND/OBJECTIVE Hyperuricemia has been proven to be an independent risk factor for chronic kidney disease (CKD). However, the role of hyperuricemia in the progression of CKD remains unclear. Thus, we performed a systematic review and meta-analysis to evaluate the efficacy and safety of febuxostat, a first line urate-lowering agent, in CKD patients with hyperuricemia. METHODS We have systematically searched for randomized controlled trials assessing the efficacy and safety of febuxostat versus control in CKD patients with hyperuricemia through MEDLINE, PubMed, EMBASE, and Cochrane databases. All statistical analyses were conducted by using the statistical package Review Manager, version 5.3.5. Heterogeneity was assessed using the Cochrane Q and I tests and summary statistics were reported with 95% confidence interval. Two-tailed test was used for analysis and a P value of <.05 is considered statistically significant. RESULTS Eleven eligible trials with 1317 participants were included in the meta-analysis. A significant reduction in serum uric acid was found in the febuxostat treated group. Also, a significant higher eGFR was found in the febuxostat treated group among CKD stage 3 and 4 patients. No significant difference of major complication or death was identified between treatment and control groups. CONCLUSIONS The meta-analysis showed that other than its urate-lowering effect, febuxostat presented a reno-protective effect in CKD patients. More studies with larger sample sizes and higher quality are required to clarify the role of febuxostat use in the progression of CKD.
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Affiliation(s)
- Tsu-Chen Lin
- School of Medicine, College of Medicine, Taipei Medical University, Taipei
| | - Lie Yee Hung
- Division of Nephrology, Department of Internal Medicine, Taipei Medical University-Shuang Ho Hospital
| | - Ying-Chun Chen
- Department of Pharmacy, Taipei Medical University-Shuang Ho Hospital, New Taipei City
| | - Wei-Cheng Lo
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei
| | - Chun Hung Lin
- Department of Orthopedics, Far Eastern Memorial Hospital
| | - Ka-Wai Tam
- Center for Evidence-Based Health Care, Taipei Medical University-Shuang Ho Hospital
- Department of Medicine Research, Taipei Medical University-Shuang Ho Hospital, New Taipei City
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University
- Department of Surgery, Taipei Medical University-Shuang Ho Hospital, New Taipei City
- Cochrane Taiwan, Taipei Medical University
| | - Mei-Yi Wu
- Division of Nephrology, Department of Internal Medicine, Taipei Medical University-Shuang Ho Hospital
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei
- Cochrane Taiwan, Taipei Medical University
- Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei
- Department of Primary Care Medicine, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan
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Hu PJ, Wu MY, Lin TC, Chen TT, Wu YC, Su SL, Lu KC, Chen JS, Sung FC, Lee CT, Yang Y, Hwang SJ, Wang MC, Hsu YH, Chiou HY, Wong CS, Lin YF. Effect of Statins on Renal Function in Chronic Kidney Disease Patients. Sci Rep 2018; 8:16276. [PMID: 30390007 PMCID: PMC6215008 DOI: 10.1038/s41598-018-34632-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 10/23/2018] [Indexed: 12/17/2022] Open
Abstract
Dyslipidemia is associated with glomerular injury. However, the effect of statins on chronic kidney disease (CKD) progression remains controversial. We aimed to investigate the efficacy of statins for renal protection in patients with CKD. The retrospective cohort study comprised 3441 patients diagnosed with CKD in multiple medical centers. We divided the patients into two cohorts based on statin prescription, and compared proportions and risks of CKD progression events between the two groups. CKD progression event was defined as an average annual decline of eGFR >5 mL/min/1.73 m2 or advancement to the dialysis stage. The result revealed that among all incident patients with CKD, 28.7% and 30.3% of the users and nonusers demonstrated CKD progression, respectively. The crude odds ratio (OR) of CKD progression was 0.93 [95% confidence interval (CI) 0.78-1.10]. After adjustment for baseline characteristics, the adjusted OR was 0.80 (95% CI 0.63-1.01). The sensitivity analysis results showed consistent OR for CKD progression, stratification by age, sex, Charlson score, and statins use within 1 year before index date. The effect of statins was significant in patients with CKD stage 3B-5 (OR 0.68, 95% CI 0.48-0.95), but not statistically significant in those with CKD stage 1-3A (OR 0.97, 95% CI 0.68-1.38). The effect of statins was significant in patients with proteinuria ≥1000 mg/day (OR 0.63, 95% CI 0.43-0.92), but not statistically significant in those with proteinuria <1000 mg/day (OR 1.02, 95% CI 0.74-1.41).
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Affiliation(s)
- Ping-Jen Hu
- Division of Gastroenterology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan
| | - Mei-Yi Wu
- Department of Nephrology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Tsu-Chen Lin
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tzu-Ting Chen
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
- Department of Emergency Medicine, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan
| | - Yun-Chun Wu
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Sui-Lung Su
- School of Public Health, National Defense Medical Center, Taipei, Taiwan
| | - Kuo-Cheng Lu
- Division of Nephrology, Department of Medicine, Fu-Jen Catholic University Hospital, School of Medicine, Fu-Jen Catholic University, Taipei, Taiwan
| | - Jin-Shuen Chen
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Fung-Chang Sung
- School of Public Health, Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Chien-Te Lee
- Division of Nephrology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung Medical University, Kaohsiung, Taiwan
| | - Yu Yang
- The Division of Nephrology, Changhua Christian Hospital, Changhua, Taiwan
| | - Shang-Jyh Hwang
- Division of Nephrology, Department of Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Ming-Cheng Wang
- Division of Nephrology, Department of Internal Medicine, Cheng Kung University Medical Center, Tainan, Taiwan
| | - Yung-Ho Hsu
- Department of Nephrology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hung-Yi Chiou
- School of Public Health, College of Public Health and Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Chung-Shun Wong
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
- Department of Emergency Medicine, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan.
- Department of Emergency Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
| | - Yuh-Feng Lin
- Department of Nephrology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan.
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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9
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Lin TC, Keenan BT, Brake LA, Azad N, Nguyen TT, Wiemken AS, Schwab RJ. 0447 Upper Airway and Surrounding Soft-Tissue Changes During Sleep in Apneics and Controls. Sleep 2018. [DOI: 10.1093/sleep/zsy061.446] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T C Lin
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - L A Brake
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - N Azad
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T T Nguyen
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R J Schwab
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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10
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Brake LA, Lin TC, Hoge C, Keenan BT, Loro E, Azad N, Nguyen T, Wiemken AS, Mellia JA, Schwab RJ. 0131 Changes in the Composition and Mechanical Properties of the Tongue Following Weight Gain in Zucker Rats. Sleep 2018. [DOI: 10.1093/sleep/zsy061.130] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L A Brake
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T C Lin
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - C Hoge
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - E Loro
- University of Pennsylvania Perelman School of Medicine, Department of Physiology and Pennsylvania Muscle Institute, Philadelphia, PA
| | - N Azad
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T Nguyen
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - J A Mellia
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R J Schwab
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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11
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Nguyen TT, Keenan BT, Galante R, Wiemken AS, Lin TC, Azad N, Brake LA, Schwab RJ, Pack AI. 0136 Evaluation of MRI-Based Soft-Tissue and Craniofacial Phenotypes in Diversity Outbred Mice and Founder Strains. Sleep 2018. [DOI: 10.1093/sleep/zsy061.135] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T T Nguyen
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R Galante
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T C Lin
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - N Azad
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - L A Brake
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R J Schwab
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A I Pack
- University of Pennsylvania, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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12
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Azad N, Brake LA, Keenan BT, Leinwand SE, Wiemken AS, Nguyen TT, Lin TC, Schwab RJ. 0095 The Effect of Chronic Intermittent Hypoxia (CIH) on Spatial Learning in Rats. Sleep 2018. [DOI: 10.1093/sleep/zsy061.094] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- N Azad
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - L A Brake
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - S E Leinwand
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T T Nguyen
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T C Lin
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R J Schwab
- University of Pennsylvania Perelman School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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13
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Lin TC, Keenan BT, Brake LA, Azad N, Nguyen TT, Wiemken AS, Schwab RJ. 0449 Effect Of Neck-bending On Upper Airway (UA) Caliber And Surrounding Soft-tissues In Controls And Apneics. Sleep 2018. [DOI: 10.1093/sleep/zsy061.448] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T C Lin
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - L A Brake
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - N Azad
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T T Nguyen
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - R J Schwab
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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14
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Brake LA, Lin TC, Keenan BT, Azad N, Nguyen TT, Wiemken AS, Goldberg AN, Schwab RJ. 0448 Quantitative Evaluation of the Upper Airway during the Muller Maneuver in Controls and Apneics. Sleep 2018. [DOI: 10.1093/sleep/zsy061.447] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- L A Brake
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T C Lin
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - B T Keenan
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - N Azad
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - T T Nguyen
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A S Wiemken
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
| | - A N Goldberg
- University of California San Francisco, San Francisco, CA
| | - R J Schwab
- University of Pennsylvania School of Medicine, Center for Sleep and Circadian Neurobiology, Philadelphia, PA
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15
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Cai J, Wu CH, Zhang Y, Wang YY, Xu WD, Lin TC, Li SX, Wang LH, Zheng J, Sun Y, Liu W, Tao T. High-free androgen index is associated with increased risk of non-alcoholic fatty liver disease in women with polycystic ovary syndrome, independent of obesity and insulin resistance. Int J Obes (Lond) 2017; 41:1341-1347. [PMID: 28487551 DOI: 10.1038/ijo.2017.116] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/07/2017] [Accepted: 04/23/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND/OBJECTIVE Central obesity and insulin resistance (IR) are common conditions in women with polycystic ovary syndrome (PCOS) and in subjects with non-alcoholic fatty liver disease (NAFLD). However, few studies have addressed the association between hyperandrogenism (HA) and NAFLD. We aimed to determine whether variations in the free androgen index (FAI) might be associated with NAFLD prevalence. SUBJECTS/METHODS A cross-sectional study was performed including 400 Chinese women with PCOS and 100 age, and body mass index (BMI)-matched women. The anthropometric and serum biochemical parameters related to sex steroids, glucose and lipid profiles were examined. Liver fat content (LFC) was measured by quantitative ultrasound. RESULTS The prevalence of NAFLD was 56.23% in PCOS patients and 38% in controls (P=0.001), and this prevalence increased with FAI quartile independently of obesity and homeostasis model assessment of insulin resistance (HOMA-IR). The FAI level increased from non-NAFLD group to NAFLD group. The FAI was positively associated with the metabolic parameters LFC, BMI, waist circumference, alanine aminotransferases, aspartate, triglyceride, total cholesterol and low-density lipoprotein cholesterol, and was negatively associated with high-density lipoprotein. Moreover, in multivariate logistic regression analysis BMI, high-sensitivity C-reactive protein (hsCRP), FAI, LFC and HOMA-IR were significantly associated with NAFLD. The cut-off values of FAI, LFC, BMI and hsCRP to predict NAFLD were 9.86%, 17.19%, 24.38% and 0.72%, respectively. The area under the curve for predicting NAFLD in PCOS patients showed comparable sensitivity and specificity between BMI and a new index combining FAI with hsCRP. CONCLUSIONS A higher FAI level is associated with increased LFC and NAFLD prevalence independent of obesity and IR.
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Affiliation(s)
- J Cai
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - C H Wu
- Division of Ultrasonography, Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Y Zhang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Y Y Wang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - W D Xu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - T C Lin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - S X Li
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - L H Wang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - J Zheng
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Y Sun
- Shanghai Key laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Shanghai Jiaotong University School of Medicine, Pudong, Shanghai, China
| | - W Liu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - T Tao
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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16
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Lin TC, Chen PL, Chen IM. A Novel Hybrid Viabahn-assisted Bypass Technique: Extra-arterial Flossing Wiring for Chronic Total Occlusion in Superficial Femoral Artery. EJVES Short Rep 2016; 32:14-17. [PMID: 28856309 PMCID: PMC5576008 DOI: 10.1016/j.ejvssr.2016.04.003] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/27/2016] [Accepted: 04/17/2016] [Indexed: 11/23/2022] Open
Abstract
Introduction A hybrid Viabahn-assisted bypass (VAB) technique is introduced for revascularizing chronic total occlusion (CTO) in superficial femoral artery (SFA) when bypass surgery is difficult or endovascular intervention fails. Report This technique combines extra-arterial flossing wiring with antegrade-retrograde intervention via traditional open exposure of middle SFA and deploying a Viabahn from the proximal true lumen through the subintimal lumen and extra-arterial space, and back into distal true lumen to restore flow. It only needs a 3–5 cm incision to expose the mid-SFA without clamping or endarterectomy of the SFA. Discussion This hybrid procedure is an alternative technique to improve SFA revascularization in some difficult CTOs.
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Affiliation(s)
- T C Lin
- Department of Cardiovascular Surgery, Taipei Veterans General Hospital, Taoyuan Branch, Taiwan, ROC.,Department of Medicine, School of Medicine, National Yang-Ming University, Taiwan, ROC
| | - P L Chen
- Department of Medicine, School of Medicine, National Yang-Ming University, Taiwan, ROC.,Division of Cardiovascular Surgery, Department of Surgery, Taipei Veterans General Hospital, Taiwan, ROC
| | - I M Chen
- Department of Medicine, School of Medicine, National Yang-Ming University, Taiwan, ROC.,Division of Cardiovascular Surgery, Department of Surgery, Taipei Veterans General Hospital, Taiwan, ROC
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17
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Chen YY, Cheng CC, Lin TC, Huang. Resveratrol ameliorates apoptosis induced by contrast medium ioxitalamate in HK-2 human renal proximal tubule cells in vitro. Crit Care 2014. [PMCID: PMC4069503 DOI: 10.1186/cc13573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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18
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Huang YT, Cheng CC, Lin TC, Lai PC. BXL 628 ameliorates toxicity of lactated Ringer in HK-2 human renal proximal tubule cells in a hypovolemia mimicking model. Crit Care 2014. [PMCID: PMC4068791 DOI: 10.1186/cc13346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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19
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Lin TC, Truong TK, Chen SH, Wang LJ, Cheng TC. Simplified 2-D cubic spline interpolation scheme using direct computation algorithm. IEEE Trans Image Process 2010; 19:2913-2923. [PMID: 20494853 DOI: 10.1109/tip.2010.2050723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
It has been shown that the 2-D cubic spline interpolation (CSI) proposed by Truong et al. is one of the best algorithms for image resampling or compression. Such a CSI algorithm together with the image coding standard, e.g., JPEG, can be used to obtain a modified image codec while still maintaining a good quality of the reconstructed image for higher compression ratios. In this paper, a fast direct computation algorithm is developed to improve the computational efficiency of the original FFT-based 2-D CSI methods. In fact, this algorithm computes the 2-D CSI directly without explicitly calculating the complex division usually needed in the FFT or Winograd discrete Fourier transform (WDFT) algorithm. In addition, this paper describes a novel way to derivate the 2-D CSI from the 1-D CSI by using the row-column method. This new fast 2-D CSI provides a regular and simple structure based upon linear correlations. Therefore, it can be implemented by the use of a modification of Kung’s pipeline structure and is naturally suitable for VLSI implementations. Experimental results show that the proposed new fast 2-D CSI algorithm can achieve almost the same CSI performance with much fewer arithmetic operations in comparison with existing efficient algorithms.
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20
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Jiang JK, Lan YT, Lin TC, Chen WS, Yang SH, Wang HS, Chang SC, Lin JK. Primary vs. delayed resection for obstructive left-sided colorectal cancer: impact of surgery on patient outcome. Dis Colon Rectum 2008; 51:306-11. [PMID: 18183462 DOI: 10.1007/s10350-007-9173-4] [Citation(s) in RCA: 42] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 06/06/2007] [Accepted: 08/25/2007] [Indexed: 02/08/2023]
Abstract
PURPOSE By comparing surgical outcomes between primary and delayed resection, we addressed whether and how surgical strategies impacted prognosis of patients with left-sided colorectal cancer underwent emergency curative resection. METHODS Between January 1980 and December 2002, a total of 143 patients were identified who presented with obstructive left-sided colorectal cancer and received emergency curative resection in Taipei Veterans General Hospital. Patients were stratified according to the timing of tumor resection into two groups: primary resection and delayed resection. Demographic data of the patients, characteristics of the tumors, and short-term and long-term outcomes were analyzed and compared between the two groups. RESULTS The demographic data and tumor characteristics did not differ between the two groups except for more rectal cancers in the delayed resection group (P=0.021). Primary resection group had a higher anastomotic leakage rate (P=0.017) and a trend toward a higher mortality rate, which did not reach statistical significance (P=0.063). The median follow-up intervals were similar (60.4 vs. 58.3 months; P=0.79). The median survival tended to be longer in delayed resection group (66 vs. 105 months; P=0.088). Overall five-year and ten-year survival for primary resection were 43.7 and 31.9 percent, respectively, compared with 67.2 and 53.2 percent, respectively, for delayed resection. CONCLUSIONS Delayed resection seems to be a safer procedure and provided a better oncologic outcome compared with primary resection in obstructive left-sided colorectal cancer under emergency situations.
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Affiliation(s)
- J K Jiang
- Division of Colon and Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, and National Yang-Ming University, School of Medicine, No. 201, Sec. 2, Shih-Pai Rd., Taipei, Taiwan, 11217.
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Tsai CS, Hsu PC, Huang GS, Lin TC, Hong GJ, Shih CM, Li CY. Midazolam attenuates adenosine diphosphate-induced P-selectin expression and platelet-leucocyte aggregation. Eur J Anaesthesiol 2005; 21:871-6. [PMID: 15717703 DOI: 10.1017/s0265021504000213] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVE The expression of P-selectin on the surface of platelets and platelet-leucocyte conjugate formation are considered to be an indicator of platelet activation in thrombotic and inflammatory disease. Midazolam is a widely used sedative and anaesthetic induction agent. It may inhibit platelet aggregation and suppress interleukin-6 and -8 response in human leucocytes, but any effect on the adhesion of activated platelets to leucocytes remains obscure. We have examined the influence of midazolam on adenosine diphosphate (ADP)-induced platelet surface P-selectin expression and platelet-leucocyte aggregation in whole blood. METHODS Human whole blood was stimulated with 2 x 10(-5)M ADP in the presence of midazolam (3 x 10(-4) to 3 x 10(-6)M). Samples were stained with a fluorochrome-conjugated CD62P and CD41a antibody for detecting human platelet P-selectin antigens. The leucocyte subpopulations were separately gated and platelet-leucocyte aggregates were defined as cells found positive for CD45 and CD62P. All samples were analysed and were electronically separated into specific cell types (platelets, neutrophils, monocytes and lymphocytes) according to their typical forward/side scattering by flow cytometry. RESULTS Midazolam significantly inhibited ADP-induced platelet P-selectin expression and attenuated platelet-leucocyte aggregation (mainly in neutrophils and monocytes) in a dose-dependent manner with a maximum inhibitory effect at 3 x 10(-4)M (P < 0.01). CONCLUSIONS This study demonstrated that midazolam decreases the ADP-induced expression of platelet surface P-selectin and platelet-leucocyte aggregation.
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Affiliation(s)
- C S Tsai
- Department of Surgery Taipei, Tri-Service General Hospital, Taiwan, ROC
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22
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Kuo PL, Hsu YL, Lin TC, Lin CC. The antiproliferative activity of prodelphinidin B-2 3′-O-gallate from green tea leaf is through cell cycle arrest and Fas-mediated apoptotic pathway in A549 cells. Food Chem Toxicol 2005; 43:315-23. [PMID: 15621344 DOI: 10.1016/j.fct.2004.11.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [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: 06/18/2004] [Accepted: 11/06/2004] [Indexed: 12/31/2022]
Abstract
Prodelphinidin B-2 3'-O-gallate, a proanthocyanidin gallate isolated from green tea leaf, was investigated for its anti-proliferative activity in human non-small cell lung cancer A549 cells. The results showed that prodelphinidin B-2 3'-O-gallate inhibited the proliferation of A549 cells with no detectable toxic effects on normal WI-38 cells as measured by the XTT assay. Flow cytometric analysis showed that prodelphinidin B-2 3'-O-gallate blocked cell cycle progression in the G0/G1 phase. In addition, prodelphinidin B-2 3'-O-gallate effectively induced A549 cell apoptosis as determined by assessing the nucleosome level in cytoplasm. Enzyme-linked immunosorbent assay showed that the G0/G1 phase arrest is due to p53-independent induction of p21/WAF1. An enhancement in Fas/APO-1 and its two form ligands, membrane-bound Fas ligand (mFasL) and soluble Fas ligand (sFasL), might be responsible for the apoptotic effect induced by prodelphinidin B-2 3'-O-gallate. We suggested that prodelphinidin B-2 3'-O-gallate's activities might be potentially contribute to its overall chemopreventive effects against lung cancer, and can possibly be considered for future therapeutic application.
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Affiliation(s)
- P L Kuo
- Department of Biotechnology, Chia-Nan University of Pharmacy and Science, Tainan, Taiwan, ROC
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Abstract
Past reports of the water relations of epiphytes, particularly bromeliads, indicate that tissue osmotic potentials in these tropical and subtropical plants are very high (close to zero) and are similar to values for aquatic plants. This is puzzling because several ecophysiological studies have revealed a high degree of drought stress tolerance in some of these epiphytes. The goal of this study was two-fold: (1) to increase the number of epiphytic taxa sampled for tissue osmotic potentials; and (2) to explain the apparent discrepancy in the significance of the tissue water relations and tolerance of drought stress in epiphytes. Tissue osmotic potentials of 30 species of epiphytic ferns, lycophytes, and orchids were measured in a subtropical rain forest in northeastern Taiwan. Nearly all values were less negative than -1.0 MPa, in line with all previous data for epiphytes. It is argued that such high osmotic potentials, indicative of low solute concentrations, are the result of environmental constraints of the epiphytic habitat on productivity of these plants, and that low rates of photosynthesis and transpiration delay the onset of turgor loss in the tissues of epiphytes such that they appear to be very drought-stress tolerant. Maintenance of photosynthetic activity long into drought periods is ascribed to low rates of transpiration and, hence, delayed tissue desiccation, and hydration of the photosynthetic tissue at the expense of water from the water-storage parenchyma.
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Affiliation(s)
- Craig E Martin
- Department of Ecology & Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA
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Lin TC, Hsu CH, Kong SS, Cherng CH, Wong CS. Ventricular asystole and complete heart block after thoracic epidural analgesia for thymectomy. Eur J Anaesthesiol 2002; 19:460-2. [PMID: 12094924 DOI: 10.1017/s0265021502220748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
We examined the effect of altering mouthpiece diameter to 1.5, 2.0, and 2.7 cm on the deposition efficiency of inertial size particles (2, 4, and 8 microm) in adult human oral-pharyngeal-laryngeal (OPL) airway cast models at various inspiratory flow rates (30, 60, 90, and 120 L/min). Deposition efficiency of 2-microm particles was unaffected by changes in mouthpiece diameter at all flow rates. Deposition of 4-microm particles decreased significantly with the 2.0- and 2.7-cm mouthpieces compared to the 1.5 cm mouthpiece at 60, 90, and 120 L/min (p < 0.01). Deposition of 4-microm particles was significantly reduced with the 2.7-cm mouthpiece compared to the 2.0-cm mouthpiece at 90 and 120 L/min (p < 0.05). Deposition efficiency of 8 microm particles decreased significantly with the 2.0- and 2.7-cm mouthpieces compared to the 1.5-cm mouthpiece at 60 L/min (p < 0.05), and with the 2.7-cm mouthpiece compared to the 1.5-cm mouthpiece at 120 L/min (p < 0.05). These results suggest that the effect of mouthpiece diameter varies with particle size, with 2- and 8-microm particles least affected. However, our findings may have important implications for improving the future design of mouthpieces of devices that deliver particles with 4-microm diameters and require inspiratory flow rates of > or = 60 L/min (i.e., DPIs) for adequate drug delivery.
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Affiliation(s)
- T C Lin
- Department of Environmental Health Sciences, School of Hygiene and Public Health, The Johns Hopkins University, Baltimore, Maryland, USA.
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Chen YF, Tsai SW, Wang SC, Huang YC, Lin TC, Wong BC. Efficient generation of continuous-wave yellow light by single-pass sum-frequency mixing of a diode-pumped Nd:YVO(4) dual-wavelength laser with periodically poled lithium niobate. Opt Lett 2002; 27:1809-1811. [PMID: 18033370 DOI: 10.1364/ol.27.001809] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report efficient generation of cw yellow light by use of single-pass sum-frequency mixing from a diode-pumped Nd:YVO(4) dual-wavelength laser with periodically poled lithium niobate. A diode-pumped Nd:YVO(4) dual-wavelength laser is implemented with a three-mirror cavity, and the optimum oscillation condition is obtained from theoretical analysis. We extracted 78 mW of power at 593 nm from 1.2 W at 1064 nm and from 1.0 W at 1342 nm in a beam with excellent quality. The output power could probably be increased to ~92 mW by antireflection coating of the crystal.
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Chen HJ, Lin TC, Hong CL, Chiang LC. Analysis of 3,N(4)-ethenocytosine in DNA and in human urine by isotope dilution gas chromatography/negative ion chemical ionization/mass spectrometry. Chem Res Toxicol 2001; 14:1612-9. [PMID: 11743744 DOI: 10.1021/tx015551x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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: 11/30/2022]
Abstract
The promutagenic etheno DNA adducts have been detected in tissue DNA of rodents and humans from various exogenous and endogenous sources. While other etheno DNA adducts have been detected and quantified by isotope dilution gas chromatography/negative ion chemical ionization/mass spectrometry (GC/NICI/MS), similar analysis for 3,N(4)-ethenocytosine (epsilonCyt) has not been available. In this report, a GC/NICI/MS assay was developed for detection and quantification of epsilonCyt in DNA and in human urine samples. The stable isotope of epsilonCyt with 7 mass units higher than the normal epsilonCyt was synthesized and used as internal standard of the assay. The adduct-enriched fraction of DNA hydrolysate was derivatized with pentafluorobenzyl bromide before GC/NICI/MS analysis with selective ion monitoring at [M - 181](-) fragments of pentafluorobenzylated epsilonCyt and its isotope analogue. One femtogram (S/N > 40) of pentafluorobenzylated epsilonCyt was detected when injected on column with selective ion monitoring mode. The limit of quantification for the entire assay was 7.4 fmol of epsilonCyt, which was approximately one thousand times lower than that of the HPLC/fluorescence assay for the nucleoside 3,N(4)-etheno-2'-deoxycytidine in DNA. Analysis of chloroacetaldehyde-treated calf thymus DNA by both GC/NICI/MS and HPLC/fluorescence methods provided similar adduct levels and thus verified the assay. This GC/NICI/MS method was used for analysis of epsilonCyt in two smokers' urine samples and the average level of epsilonCyt was 101 +/- 17 pg/mL/g of creatinine. Thus, quantification of epsilonCyt in DNA and in urine by this highly specific and ultrasensitive isotope dilution GC/NICI/MS assay may facilitate research on the role of epsilonCyt in carcinogenesis and in cancer development.
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Affiliation(s)
- H J Chen
- Department of Chemistry, National Chung Cheng University, 160 San-Hsing, Ming-Hsiung, Chia-Yi 62142, Taiwan.
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Chao MR, Lin TC, Chao HR, Chang FH, Chen CB. Effects of methanol-containing additive on emission characteristics from a heavy-duty diesel engine. Sci Total Environ 2001; 279:167-179. [PMID: 11712594 DOI: 10.1016/s0048-9697(01)00764-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study was aimed to investigate the effect of methanol-containing additive (MCA) on the regulated emissions of hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), particulate matter (PM), as well as the unregulated carbon dioxide (CO2) and polycyclic aromatic hydrocarbons (PAHs) from a diesel engine. The engine was tested on a series of diesel fuels blended with five additive levels (0, 5, 8, 10 and 15% of MCA by volume). Emissions tests were performed under both cold- and hot-start transient heavy-duty federal test procedure (HD-FTP) cycles and two selected steady-state modes. Results show that MCA addition slightly decreases PM emissions but generally increases both THC and CO emissions. Decrease in NOx emissions was found common in all MCA blends. As for unregulated emissions, CO2 emissions did not change significantly for all MCA blends, while vapor-phase and particle-associated PAHs emissions in high load and transient cycle tests were relatively low compared to the base diesel when either 5 or 8% MCA was used. This may be attributed to the lower PAHs levels in MCA blends. Finally, the particle-associated PAHs emissions also showed trends quite similar to that of the PM emissions in this study.
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Affiliation(s)
- M R Chao
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan
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Abstract
BACKGROUND Laparoscopy has gained wide acceptance as a treatment modality in a variety of colonic and rectal disorders. Currently, most laparoscopic procedures are performed using a carbon dioxide (CO2) pneumoperitoneum, which can lead to cardiopulmonary loading and subsequent complications. The object of this study was to assess the feasibility of gasless laparoscopy-assisted colorectal surgery (GLACS) as an alternative method. METHODS Patients with benign colonic lesions were enrolled in the study. The operative field was exposed with a subcutaneous wire lifting system. A small incision, ~5 cm in length, was made early in the operation. The surgeon operated through the trocar ports and this incision using both laparoscopic and conventional instruments. The cardiopulmonary responses of the patients were monitored continuously during the operation. RESULTS Fifteen consecutive patients underwent GLACS. In two patients (13.3%), conversion to open surgery was necessary. The exposure and ease of the procedure were acceptable. However, when the patients were stratified into hemicolectomy and sigmoidectomy groups, GLACS scored more favorably in the sigmoidectomy group. There were no operative deaths. One minor complication developed postoperatively. All of the patients recovered uneventfully, with return of bowel function in 2.8 +/- 0.1 days. The mean postoperative hospital stay was 6.4 +/- 0.4 days. The cardiac and pulmonary status of the patients remained stable during the operation. CONCLUSION Gasless laparoscopy-assisted colorectal surgery is technically feasible; thus, it provides an alternative means for the performance of minimal-access surgery.
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Affiliation(s)
- J K Jiang
- Division of Colorectal Surgery, Department of Surgery, Veterans General Hospital-Taipei, 201, Sec. 2, Shih-Pai Road, Taipei, Taiwan, R.O.C.
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Lin TC, Chang FH, Hsieh JH, Chao HR, Chao MR. Environmental exposure to polycyclic aromatic hydrocarbons and total suspended particulates in a Taiwanese temple. Bull Environ Contam Toxicol 2001; 67:332-338. [PMID: 11479661 DOI: 10.1007/s001280129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2000] [Accepted: 05/22/2001] [Indexed: 05/23/2023]
Affiliation(s)
- T C Lin
- Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan, Republic of China
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31
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Lin TC, Wang CX, Joyce CM, Konigsberg WH. 3'-5' Exonucleolytic activity of DNA polymerases: structural features that allow kinetic discrimination between ribo- and deoxyribonucleotide residues. Biochemistry 2001; 40:8749-55. [PMID: 11467934 DOI: 10.1021/bi0105936] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have determined rates for the excision of nucleotides from the 3' termini of chimeric DNA-RNA oligonucleotides using the Klenow fragment (KF) and two other DNA polymerases, from phages T4 and T7. For these studies, we synthesized DNA-RNA chimeric oligonucleotides with RNA residues in defined positions. When a ribonucleotide residue was placed at the 3' terminus, all three DNA polymerases removed it at the same rate as they did for substrates composed solely of deoxynucleotide residues. There was a decrease in the excision rate, however, when a ribonucleotide residue was located at the second or third position from the 3' terminus. When both the second and third positions were occupied by ribonucleotide residues, the excision rate for the 3' terminal nucleotide was reduced even further and was almost identical to the rate observed when the DNA polymerases encountered single-stranded RNA. The magnitude of the effect of ribonucleotide residues on the excision rate was lower when Mn(2+) replaced Mg(2+) as the essential divalent cation. Two KF mutations, Y423A and N420A, selectively affected the excision rates for the chimeric substrates. Specifically, Y423A totally abolished the rate reduction when there was a single ribonucleotide residue immediately preceding the 3' terminus, whereas N420A diminished, but did not eliminate, the rate reduction relative to that of wild-type KF when the single ribonucleotide residue occupied either the second or third position from the 3' terminus. These results are consistent with the structure of a KF-ss DNA complex from which it can be deduced, by modeling, that a 2' OH group on the second sugar from the 3' terminus would sterically clash with the Tyr 423 side chain, and a 2' OH group on the third sugar would clash with the side chain of Asn 420. The corresponding mutations in T4 DNA polymerase did not affect the rate of hydrolysis of the chimeric oligonucleotides. Thus, there appears to be a major difference in the kinetic behavior of KF and T4 DNA polymerase with respect to the exonuclease reaction. These results are discussed with respect to their possible biological relevance to DNA replication.
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Affiliation(s)
- T C Lin
- Department of Molecular Biophysics and Biochemistry, Yale University, 333 Cedar Street, New Haven, Connecticut 06520, USA
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Stetsko YP, Juretschke HJ, Huang YS, Lee YR, Lin TC, Chang SL. Polarization-resolved output analysis of X-ray multiple-wave interaction. Acta Crystallogr A 2001; 57:359-67. [PMID: 11326121 DOI: 10.1107/s0108767301001325] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2000] [Accepted: 01/17/2001] [Indexed: 11/10/2022] Open
Abstract
The polarization suppression of the interfering components in X-ray multiple-wave interaction is observed for the first time by using a polarization analyzer with an arbitrary inclination of the diffraction plane with respect to that of the investigated crystal. The condition for total suppression of the multiple-wave interaction outside the investigated crystals by a polarization analyzer is derived theoretically from the modified Born approximation. By means of the partial suppression of the strong interfering component, the increase in the visibility of multiple-wave interference is experimentally and theoretically demonstrated. The proposed experimental polarization-resolved technique provides an operational way to enhance the visibility of X-ray multiple-wave interaction outside the investigated crystals for direct phase determination.
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Affiliation(s)
- Y P Stetsko
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.
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Wang WS, Lin JK, Lin TC, Chiou TJ, Liu JH, Fan FS, Yen CC, Chen WS, Jiang JK, Yang SH, Wang HS, Chen PM. Carcinoembryonic antigen in monitoring of response to systemic chemotherapy in patients with metastatic colorectal cancer. Int J Colorectal Dis 2001; 16:96-101. [PMID: 11355325 DOI: 10.1007/s003840000266] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The response to chemotherapy of solid tumors is generally assessed by measuring tumors visualized by imaging. However, the response assessment based on imaging is not always feasible because patients often have disease not measurable by imaging, such as diffuse peritoneal dissemination. We evaluated the correlation between the change on imaging and change in CEA levels for assessing chemotherapeutic response of patients with metastatic colorectal cancer. Between July 1993 and August 1999 we retrospectively examined 136 patients with metastatic colorectal carcinoma, all of whom had measurable lesions. Forty patients received oral tegafur-uracil (300 mg/m2/day) plus folinic acid (60 mg/day) for 4 weeks, repeated every 5 weeks, as the firstline treatment. Another 96 patients received either a weekly intravenous bolus injection of 5-fluorouracil (400 mg/m2) plus folinic acid (20 mg/m2), or an intravenous bolus injection of 5-fluorouracil (425 mg/m2) plus folinic acid (20 mg/m2) for 5 consecutive days every month. Responders, based on CEA assessment, were defined as those with a greater than 50% drop in CEA level for more than 4 weeks. The pretreatment CEA levels were elevated beyond the normal cutoff value in 110 (81%) patients. A response rate of 18.4% (95% CI, 11.9-24.9%), including 8 complete remissions and 17 partial remissions, was achieved according to imaging studies. The response rate assessed by CEA was 25% (34/136). Sixteen responders (47%) based on CEA had no remission on imaging. The sensitivity of change in CEA levels in the prediction of true responders and progressive diseases on imaging were 72% and 81%, respectively. In terms of the positive predictive value, change in CEA levels in the prediction of true responders and progressive disease on imaging were 53% and 85%, respectively. Patients with remarkable falls on CEA levels survived significantly longer than nonresponders (P < 0.001, log-rank test). At follow-up of 48 months the median survival for responders and nonresponders assessed by CEA was 28 months and 13 months, respectively. These data suggest that measurement of CEA levels might be helpful in monitoring chemotherapeutic response when imaging study is unsuitable for assessing the response in clinical practice. Furthermore, measurement of CEA levels may be helpful in determining the prognosis of patients with metastatic colorectal cancer receiving chemotherapy.
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Affiliation(s)
- W S Wang
- Division of Medical Oncology, Department of Medicine, Veterans General Hospital Taipei and National Yang-Ming University School of Medicine, Taipei 11217, Taiwan
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Abstract
Reactive oxygen species have been implicated as important pathological mediators in many clinical disorders, including periodontal disease. As a possible alternative for the treatment of periodontal disease, the antimicrobial activity of six tannins isolated from Vaccinium vitis-idaea L., with confirmed antioxidant activity, were assayed by the agar dilution method against selected periodontal pathogens, Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia. The results showed that epicatechin-(4beta-->8)-epicatechin-(4beta-->8, 2beta-->O-->7)-catechin had strong antimicrobial activity against P. gingivalis and P. intermedia, but not A. actinomycetemcomitans. The other tannins tested did not show antimicrobial activity. We conclude that tannins isolated from V. vitis-idaea L. with antimicrobial activity could potentially be used for the treatment of periodontal disease.
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Affiliation(s)
- K Y Ho
- Graduate Institute of Dental Sciences and Department of Periodontics, Kaohsiung Medical University, Taiwan
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Lin TC, Wang CH, Teng CC. Quantitative feedback synthesis of sampled-data systems with time-delay by approximate Z-transform. ISA Trans 2001; 40:325-332. [PMID: 11577820 DOI: 10.1016/s0019-0578(01)00002-7] [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: 05/23/2023]
Abstract
In this paper, the equivalent disturbance rejection (EDR) in QFT design methodology is proposed for dealing with sampled-data systems with time-delay. This EDR is mainly to overcome the non-minimum phase zero generated by the first order Pade' approximation of the time-delay factor. Due to plant parameter uncertainty, the analogue controller is to be designed so that the system response lies within permissible bounds. By approximate Z-transform, the analogue controller can be transformed directly into a digital one and then the analogue plant is transformed into the digital plant, with sampling time as a free parameter. By adjusting the sampling time, the uncertain sampled-data system can be stabilized. In comparison with other approaches, our design framework is much more systematic by using only algebraic manipulations and transparent enough to guide the designer to realize the physical controller for the plant with prescribed bounds on its parameters.
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Affiliation(s)
- T C Lin
- Department of Electronic Engineering, Feng-Chia University, Taichung and School of Microelectronic Engineering, Griffith University, Brisbane, Queensland, Australia.
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Lin CC, Hsu YF, Lin TC, Hsu HY. Antioxidant and hepatoprotective effects of punicalagin and punicalin on acetaminophen-induced liver damage in rats. Phytother Res 2001; 15:206-12. [PMID: 11351354 DOI: 10.1002/ptr.816] [Citation(s) in RCA: 87] [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] [Indexed: 11/05/2022]
Abstract
Punicalagin and punicalin were isolated from the leaves of Terminalia catappa L., a Combretaceous plant distributed throughout tropical and subtropical beaches, which is used for the treatment of dermatitis and hepatitis. Our previous studies showed that both of these compounds exert antioxidative activity. In this study, the antihepatotoxic activity of punicalagin and punicalin on acetaminophen-induced toxicity in the rat liver was evaluated. After evaluating the changes of several biochemical functions in serum, the levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were increased by acetaminophen administration and reduced by punicalagin and punicalin. Histological changes around the hepatic central vein and oxidative damage induced by acetaminophen were also recovered by both compounds. The data show that both punicalagin and punicalin exert antihepatotoxic activity, but treatment with larger doses enhanced liver damage. These results suggest that even if punicalagin and punicalin have antioxidant activity at small doses, treatment with larger doses will possibly induce some cell toxicities.
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Affiliation(s)
- C C Lin
- Graduate Institute of Natural Products, Kaohsiung Medical College, Kaohsiung, Taiwan.
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Lin CC, Hsu YF, Lin TC. Antioxidant and free radical scavenging effects of the tannins of Terminalia catappa L. Anticancer Res 2001; 21:237-43. [PMID: 11299741] [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] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Reactive oxygen species (ROS) react with biological molecules and destroy the structure of cells and eventually cause free radical-induced disease such as inflammation and cancer. Previous studies showed that an aqueus extract of Terminalia catappa L. exhibited superoxide radical scavenger activity and modification of mitomycin C-induced clasto-genicity. In order to investigate the multiple antioxidant effect of the tannin components of T. catappa L., their ability to prevent lipid peroxidation, superoxide formation and their free radical scavenging activity were evaluated. The results indicated that all of these components showed potent antioxidant activity. Punicalagin and punicalin were the most abundant components and had the strongest anti-oxidative effects of this group of tannins.
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Affiliation(s)
- C C Lin
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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Wang WS, Lin JK, Chiou TJ, Liu JH, Fan FS, Yen CC, Lin TC, Jiang JK, Yang SH, Chen PM. Randomized trial comparing weekly bolus 5-fluorouracil plus leucovorin versus monthly 5-day 5-fluorouracil plus leucovorin in metastatic colorectal cancer. Hepatogastroenterology 2000; 47:1599-603. [PMID: 11149011] [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: 04/15/2023]
Abstract
BACKGROUND/AIMS The purpose of this study was to compare the efficacy and toxicity profiles of weekly intravenous (i.v.) bolus injection of 5-fluorouracil plus low-dose leucovorin with the Mayo Clinics' monthly 5-day schedule of 5-fluorouracil and leucovorin in the treatment of metastatic colorectal cancer. METHODOLOGY A total of 96 patients with previously untreated metastatic colorectal cancer were randomized to receive either a weekly i.v. bolus injection of 5-fluorouracil 400 mg/m2 plus leucovorin 20 mg/m2 (weekly arm), or i.v. bolus injection of 5-fluorouracil 425 mg/m2 plus leucovorin 20 mg/m2 for 5 consecutive days every 4 or 5 weeks (monthly arm). Therapy was continued until disease progression or unacceptable toxicity appeared. In the presence of disease progression, the study regimen was stopped and second-line treatment was instituted after the patient was discontinued from this study. RESULTS There was no significant difference of response rates between both regimens. The response rate were 14.3% in the weekly arm (2 CR and 5 PR, 95% CI: 2.6-25.2%) and 10.6% in the monthly arm (1 CR and 4 PR; 95% CI: 6.5-32.3%), respectively (P = 0.8957). The survival times were also similar between the two (P = 0.4207, log-rank test). The median survival were 15.8 months in the monthly arm and 18.4 months in the weekly arm. Hematologic toxicity was minimal in both arms. However, the monthly arm produced a higher toxicity in severe (grade 3-4) diarrhea (14.9% vs. 2%; P = 0.029) and stomatitis (8.5% vs. 0; P = 0.054). CONCLUSIONS Weekly bolus injection of 5-fluorouracil and low-dose leucovorin achieved a similar response rate and survival as compared with the Mayo Clinics' monthly 5-day schedule, but severe toxicity was less commonly seen using the weekly regimen. As current chemotherapeutic treatment for metastatic colorectal cancer is largely palliative rather than curative, the weekly bolus regimen may be a more favorable approach in managing metastatic colorectal cancer.
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Affiliation(s)
- W S Wang
- Division of Medical Oncology, Department of Medicine, Veterans General Hospital-Taipei, Taipei 11217, Taiwan, ROC
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Lin JK, Wang WS, Hsieh RK, Hsu TC, Chiou TJ, Liu JH, Fan FS, Yen CC, Lin TC, Jiang JK, Yang SH, Wang HS, Chen PM. Phase II study of oral tegafur-uracil and folinic acid as first-line therapy for metastatic colorectal cancer: Taiwan experience. Jpn J Clin Oncol 2000; 30:510-4. [PMID: 11155922 DOI: 10.1093/jjco/hyd124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 11/13/2022] Open
Abstract
BACKGROUND Tegafur-uracil has become an important regimen in the treatment of metastatic colorectal cancer. Tegafur is a prodrug that is converted to 5-fluorouracil (5-FU) and has been reported to be less toxic and to have a higher therapeutic index. The additional advantage of tegafur is oral administration, an important consideration to improve the quality of life in these patients. Tegafur in combination with uracil is thought to have greater anti-tumor activity due to the inhibitory effect of uracil on the degradation of 5-FU by hepatic dihydropyrimidine dehydrogenase. Tegafur with folinic acid has been reported with modest efficacy and acceptable toxicity. The purpose of this study was to evaluate the effectiveness and toxicity profile of oral tegafur-uracil plus folinic acid in Chinese patients with metastatic colorectal cancer. METHODS Between May 1998 and August 1999, 40 patients with metastatic colorectal carcinoma were enrolled in this study. All the patients had to have measurable lesions. The initial dose of tegafur-uracil was 300 mg/m2/day for 28 days, followed by a 7-day rest period. Folinic acid was administered orally at a dose of 60 mg/day concurrently with tegafur-uracil. For patients with neutrophil count <1500/microl or a platelet count <100,000/microl after treatment, the treatment was postponed for a maximum of 2 weeks. After that time, if the neutrophil count was 1000-1500/microl and the platelet count was 70,000-100,000 microl, the dose of tegafur-uracil was reduced by 50%, and if lower values resulted, the treatment was discontinued. RESULTS Forty patients received a total of 318 courses of treatment and a response rate of 32.5% (95% CI, 18-47%), including five complete remissions and eight partial remissions, was achieved. Toxicity was mild and generally tolerable. Gastrointestinal toxicities, including diarrhea, nausea and vomiting, were the major side effects. Seven incidences (17.5%) of grade 3-4 gastrointestinal toxicity were observed. Hematological toxicities were minimal with no evidence of severe (grade 3 or 4) leukopenia and thrombocytopenia. No episode of hepatic, renal, cardiac or neurological toxicity occurred. Two patients (5%) developed transient painful fissuring erythroderma over their palms and soles (the hand-foot syndrome). CONCLUSIONS The data from our study indicate that oral tegafur-uracil plus folinic acid is an active and tolerable first-line treatment for Chinese patients with metastatic colorectal cancer, with the additional advantage of being easily administered at home.
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Affiliation(s)
- J K Lin
- Department of Surgery, Veterans General Hospital-Taipei and National Yang-Ming University School of Medicine, Taiwan
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Wang WS, Chen PM, Chiou TJ, Liu JH, Fan FS, Lin TC, Jiang JK, Yang SH, Yen CC, Wang HS, Lin JK. Factors predictive of survival in patients with node-positive colorectal cancer in Taiwan. Hepatogastroenterology 2000; 47:1590-4. [PMID: 11149009] [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: 02/18/2023]
Abstract
BACKGROUND/AIMS Preoperative CEA levels, depth of tumor penetration, and the number of positive lymph nodes were reported as independent factors prognostic of survival in colorectal cancer patients. This study was carried out in an effort to evaluate the prognostic significance of these three factors in patients with Dukes' C colorectal cancer in Taiwan. METHODOLOGY Between 1992 and 1994, a total of 112 patients with node-positive colorectal cancer were evaluated retrospectively at the Veteran General Hospital-Taipei. All patients underwent potentially curative surgery and received 5-fluorouracil based adjuvant chemotherapy. Reference to the Dukes' classification was according to the classical criteria described in 1932 for carcinoma of the rectum and adapted for use in colonic tumors. Data on the location of the tumor, depth of penetration, number of positive lymph nodes, degree of tumor differentiation, and preoperative CEA levels were analyzed to understand their association with survival. Blood samples for CEA measurement were taken a few days before operation. A multivariate analysis using the Cox's proportional hazards regression model was then performed to determine the most important independent predictors of survival among all the possible variables. RESULTS Using univariate analysis the number of positive lymph nodes (P < 0.001), penetration of the bowel wall (P < 0.001), and preoperative CEA levels (P < 0.001) were found as significant prognostic factors, while the degree of tumor differentiation, location of the tumor, age and sex were not significant. Using multivariate Cox analysis the number of positive lymph nodes, penetration of the bowel wall, and preoperative CEA levels were still found as independent prognostic factors in node-positive colorectal cancer patients. CONCLUSIONS Data obtained from our study indicates that preoperative CEA levels, depth of tumor penetration, and the number of positive lymph nodes were independent prognostic factors in Dukes' C colorectal cancer patients. They could serve as appropriate modifications of the initial Dukes scheme in node-positive diseases.
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Affiliation(s)
- W S Wang
- Division of Medical Oncology, Department of Medicine, Veterans General Hospital-Taipei, 11217, Taiwan, ROC
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Huang GS, Yeh CC, Kong SS, Lin TC, Ho ST, Wong CS. Intra-articular ketamine for pain control following arthroscopic knee surgery. Acta Anaesthesiol Sin 2000; 38:131-6. [PMID: 11125687] [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: 02/18/2023]
Abstract
BACKGROUND In an attempt to demonstrate the peripheral effect of ketamine on the synovia of knee joint and to smoothen the recovery from arthroscopic knee surgery, this study was designed to evaluate the analgesic effect of intra-articular ketamine injection after knee arthroscopy. METHODS In a double blind randomized study, 60 patients were assigned to three groups. Group A patients received saline 5 mL intra-articularly after closure of the surgical wound to serve as control; group B patients received ketamine 0.5 mg/kg of body weight intra-muscularly to rule out the systemic effect and group C patients received ketamine 0.5 mg/kg of body weight diluted with saline up to 5 mL intra-articularly. After surgery, patients were evaluated for pain with visual analogue scale (VAS 0 to 10) for 24 h with the operated leg in the position of extension rest and active flexion of the knee joint to 60 degree angle. Rescue pethidine (1 mg/kg of body weight) was given intra-muscularly for pain relief at request every 4 h postoperatively if necessary. The time to first rescue analgesic request was recorded, and the total doses of pethidine were calculated. RESULTS The results showed no difference in the VAS pain scores at rest and during active motion in the range of 60 degree among three groups during a 24 h observation. CONCLUSIONS Ketamine had been reported to have peripheral analgesic effects with variable duration on measurements of pain and hyperalgesia. However, in the present study, we failed to demonstrate that ketamine could provide a clinically relevant peripheral analgesic effect for postoperative arthroscopic pain.
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Affiliation(s)
- G S Huang
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan, R.O.C
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Abstract
A Sengstaken-Blakemore (SB) tube, when used approximately, still has a place in the management of acute variceal bleeding. Due to a number of reported complications from the misplacement of this tube, an x-ray localization before full inflation of the gastric balloon is recommended as the standard of care. Here, we report a new technique of SB tube placement with endoscopic confirmation in three patients. This technique is easy, accurate, and can be performed in any unit where a patient with variceal bleeding can be managed. Because it cuts down on the need for an x-ray or ultrasound confirmation, this technique may well become the "standard of care" among the practicing gastroenterologists.
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Affiliation(s)
- T C Lin
- Division of Gastroenterology/Hepatology, University of Colorado, Denver, USA
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Abstract
3-Cyclopropanecarbonyloxy-2-cyclohexen-1-one has been found to be a new, potent, low molecular weight non-triketone type inhibitor of 4-hydroxyphenylpyruvate dioxygenase with IC50 value of 30 nM. Preliminary studies suggest that the two carbonyl groups present in the compound are crucial for the inhibition activity.
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Affiliation(s)
- S W Lin
- Department of Chemistry, Tunghai Christian University, Taichung, Taiwan, ROC
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Hsu CH, Lin TC, Yeh CC, Ho ST, Wong CS. Convulsions during superior laryngeal nerve block--a case report. Acta Anaesthesiol Sin 2000; 38:93-6. [PMID: 11000673] [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: 02/17/2023]
Abstract
Complications following local anesthesia for fiberoscope-assisted intubation are rare. We report a case with surgical condition indicating awake endotracheal intubation for general anesthesia, suffering from convulsions after receiving left superior laryngeal nerve block to facilitate the procedure. The possible cause may be accidental injection of the local anesthetic into the vertebral artery. Although the amount of local anesthetic injected was small, its concentration in the brain might be high enough to cause convulsion. The central nervous system toxicity of local anesthetic depends not only on the dosage used, but also on the rate of injection, as well as the site at which it is injected. Starting from a small dose together with careful monitoring of patient's response is advised when nerve block in the neck is performed. Here, we also emphasize the importance of availability of resuscitation equipment for maintaining adequate ventilation and circulation in case of emergency.
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Affiliation(s)
- C H Hsu
- Department of Anesthesiology, Tri-Service General Hospital, Taipei, Taiwan, R.O.C
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Chen PS, Li JH, Liu TY, Lin TC. Folk medicine Terminalia catappa and its major tannin component, punicalagin, are effective against bleomycin-induced genotoxicity in Chinese hamster ovary cells. Cancer Lett 2000; 152:115-22. [PMID: 10773401 DOI: 10.1016/s0304-3835(99)00395-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.4] [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: 11/16/2022]
Abstract
Terminalia catappa L. is a popular folk medicine for preventing hepatoma and treating hepatitis in Taiwan. In this paper, we examined the protective effects of T. catappa leaf water extract (TCE) and its major tannin component, punicalagin, on bleomycin-induced genotoxicity in cultured Chinese hamster ovary cells. Pre-treatment with TCE or punicalagin prevented bleomycin-induced hgprt gene mutations and DNA strand breaks. TCE and punicalagin suppressed the generation of bleomycin-induced intracellular free radicals, identified as superoxides and hydrogen peroxides. The effectiveness of TCE and punicalagin against bleomycin-induced genotoxicity could be, at least in part, due to their antioxidative potentials.
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Affiliation(s)
- P S Chen
- Institute of Genetics, National Yang-Ming University, Taipei, Taiwan, ROC
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46
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Abstract
1. Effects of the parasympathetic neuromediator acetylcholine (ACh) on atrial tissues vary greatly depending on the species, the type of atrial cells and experimental conditions. The aim of the present study was to investigate, with microelectrode techniques, the arrhythmogenic effects of ACh in tilapia (Oreochromis sp.) isolated atria at room (22-25 degrees C) and high temperature (37 degrees C). 2. Acetylcholine (1-10 micromol/L) shortened action potential duration (APD), depressed action potential plateau and decreased twitch force in tilapia atria, as it did in human atrial fibres. In addition, ACh induced premature responses and re-entrant tachyarrhythmias (TA; frequency range from 7 to 25 Hz) in five of 19 and 14 of 22 tilapia atria tested at room and high temperature, respectively. The higher incidence of ACh-induced TA at 37 degrees C compared with room temperature was statistically significant. 3. The ACh-induced TA consisted of high-frequency and uniform action potentials accompanied by tension oscillation and elevation of diastolic force (flutter). Acetylcholine-induced TA could be readily abolished by atropine (1 micromol/L) and prevented by treatment with agents with local anaesthetic properties, such as 0.1 micromol/L tetrodotoxin or 3 micromol/L quinidine. The antagonistic action of quinidine occurred without significant prolongation of APD. 4. The present findings suggest that pharmacological concentrations of the cholinergic muscarinic agonist ACh readily induce TA (mainly atrial flutter) in tilapia atria, presumably via sodium channel-dependent re-entrant excitation. The poikilothermic tilapia appears to be an appropriate animal model for the study of atrial TA.
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Affiliation(s)
- T C Lin
- Department of Biomedical Engineering, National Defense Medical Center, Taipei, Taiwan, ROC
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Chao HR, Lin TC, Chao MR, Chang FH, Huang CI, Chen CB. Effect of methanol-containing additive on the emission of carbonyl compounds from a heavy-duty diesel engine. J Hazard Mater 2000; 73:39-54. [PMID: 10686377 DOI: 10.1016/s0304-3894(99)00162-4] [Citation(s) in RCA: 3] [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: 05/23/2023]
Abstract
This study was aimed at determining the effect of methanol-containing additive (MCA) on the emission of carbonyl compounds (CBCs) generated from the diesel engine. For this experiment, a heavy-duty diesel engine was connected with a full flow critical flow ventri (CFV) type dilution tunnel, a Schenck GS-350 DC dynamometer, and a DC-IV control system in series. The operating conditions of the heavy-duty diesel engine for both cold-start and hot-start Transient Cycle tests and for both low-load and high-load steady-state tests were ascertained. The exhaust of CBCs collected from a 2,4-dinitrophenylhydrazine (2,4-DNPH)-coated cartridge were first converted to corresponding hydrazone derivatives, which were then solvent-eluted and analyzed by a High Performance Liquid Chromatograph (HPLC) with an ultraviolet-visible (UV) detector. When either 10% or 15% MCA was used, the emission factors of the CBCs acrolein and isovaleraldehyde increased by at least 91%. Accordingly, future studies must be done to cut down the emission of CBCs when MCA and methanol alternative fuels are used.
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Affiliation(s)
- H R Chao
- Department of Environmental Engineering, National Cheng-Kung University, Tainan, Taiwan
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Wu CT, Yu JC, Yeh CC, Lee MM, Lin TC, Wong CS. Postoperative intramuscular dextromethorphan injection provides pain relief and decreases opioid requirement after modified radical mastectomy. Int J Surg Investig 2000; 2:145-9. [PMID: 12678512] [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: 04/20/2023]
Abstract
BACKGROUND Narcotics are still the therapeutic mainstay for postoperative pain relief. However, many unwanted side effects are accompanied. NMDA antagonists have been demonstrated to produce analgesic and antihyperalgesic effects, moreover, to possess potentiated effect of narcotics on postoperative pain management. AIMS To examine whether postoperative dextromethorphan (DM), an antitussive and also an NMDA antagonist, intramuscular injection (I.M.) reduced pain and analgesic requirement after modified radical mastectomy (MRM). METHODS Sixty-one patients scheduled for MRM were included and randomly allocated into two groups. For the control group (n=31), patients received chlorpheniramine maleate (CPM, 20 mg) I.M., while in the DM group (n = 30), 40 mg DM containing 20 mg CPM (I.M.) was given at the end of surgery. Meperidine (1 mg/kg, I.M.) was prescribed for postoperative pain relief, if ask. The time to first meperidine injection, total meperidine consumption, worst pain score, bed-rest time, and meperidine-related side effects were recorded for 48 hours postoperation. RESULTS A longer time to first meperidine injection (20.3 +/- 1.4 vs 1.5 +/- 0.2 hr, p < 0.001) and lower meperidine consumption (10.7 +/- 4.0 vs 70.7 +/- 8.9 mg, p < 0.001) were observed in the DM group than the control group. The average bed rest time was significantly shorter in the DM group than in the control group (18.9 +/- 1.5 vs 23.4 +/- 1.6 hr, p < 0.001). The number of patients who required meperidine injection (6 vs 27, p < 0.005) and meperidine-related side effects were significantly lower in the DM group than in the control group (1 vs 7, p < 0.025). No difference was noted in worst VAS pain score between the DM and the study groups. CONCLUSION Postoperative DM I.M. injection provided an analgesic effect and reduced meperidine requirement after MRM.
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Affiliation(s)
- C T Wu
- Department of Anesthesiology, Tri-Service General Hospital Taipei, Taiwan 100, R.O.C
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Wang WS, Lin JK, Chiou TJ, Liu JH, Fan FS, Yen CC, Lin TC, Jiang JK, Yang SH, Wang HS, Chen PM. Preoperative carcinoembryonic antigen level as an independent prognostic factor in colorectal cancer: Taiwan experience. Jpn J Clin Oncol 2000; 30:12-6. [PMID: 10770562 DOI: 10.1093/jjco/hyd003] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [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: 12/24/2022] Open
Abstract
BACKGROUND Preoperative carcinoembryonic antigen (CEA) level is considered as a factor predictive of survival in colorectal cancer patients. Patients with normal (<5 ng/ml) or lower preoperative CEA levels were reported to have significantly longer survival. This study was carried out in an effort to evaluate the prognostic significance of preoperative CEA levels of patients with colorectal cancer in Taiwan. METHODS Between 1990 and 1994, 218 patients with histologically confirmed colorectal cancers were evaluated retrospectively at the Veterans General Hospital-Taipei. All the patients had undergone potentially curative surgery. Patients with metastatic diseases were not included. 5-Fluorouracil-based adjuvant chemotherapy was administered if the patients had Dukes' C disease. Reference to the Dukes' classification was according to the classical criteria described in 1932 for carcinoma of the rectum and adapted for use in colonic tumors. Data on gender, age, degree of tumor differentiation, location of the tumor, tumor size, lymph node metastasis, penetration of the bowel wall and preoperative CEA levels were analyzed to determine their association with survival. Blood samples for CEA measurement were taken a few days before operation and were analyzed using the radioimmunoassay method. Multivariate analysis by Cox's proportional hazards regression model was performed to determine the most important predictors of survival among all of the possible variables. RESULTS By univariate analysis, the size of the tumor (p = 0.012), lymph node metastases (p = 0.007), penetration of the bowel wall (p < 0.001) and preoperative CEA levels (p < 0.001) were found to be significant prognostic factors, while gender, age, degree of tumor differentiation and location of the tumor were not significant. By multivariate Cox analysis, lymph node metastases (p = 0.003), penetration of the bowel wall (p = 0.0001) and preoperative CEA levels (p = 0.0001) were found to be independent prognostic factors in colorectal cancer patients. CONCLUSIONS The data from our study indicate that in addition to lymph node metastases and penetration of the bowel wall, the preoperative CEA levels are also an independent prognostic factor in non-metastatic colorectal cancer patients after curative surgery. This could serve as an appropriate modification to the initial Dukes' scheme in colorectal cancer.
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Affiliation(s)
- W S Wang
- Department of Medicine, Veterans General Hospital-Taipei and National Yang-Ming University School of Medicine, Taiwan
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Abstract
Dynamic and flow-through flux chambers are convenient tools for field measurements of gas or VOC emission flux from solid surfaces in the field. This study was undertaken to collect on site and quantify the emissions of volatile organic compounds (VOCs) released from athletic running tracks. Three typical types of tracks, one synthetic rubber and two tracks (types I and II) consisting mainly of polyurethane, were studied. They were all installed with adhesives and backings, both of which contributed significant amount of VOCs. VOCs released from the track surface were collected with a flux chamber and subsequently analyzed by a gas chromatograph/mass spectrometer (GC/MS). Also, for each track and at each selected time the emission flux and mass emission were measured on site under outdoor conditions over a period of 40 min. GC/MS analyses show that the VOCs emitted include 2-methyl furan, butanal, methyl ethyl ketone, benzene, heptane, methyl isobutyl ketone, toluene+octane, hexanal, nonane+ethylbenzene, xylenes+styrene, propyl benzene, decane, 1,3,5-trimethyl benzene, 1,2,4-trimethyl benzene, 1,2, 3-trimethyl benzene and undecane. Of these, hexanal was the common and principal compound for all three types of tracks. 2-Methyl furan and methyl isobutyl ketone were the characteristic compounds for the synthetic rubber and the type II of polyurethane tracks, respectively. In the field studies, no unique compounds were found in the type I of polyurethane tracks. For each of these three types of tracks the total-VOCs emission flux was correlated to the track age and track surface temperature. The results of multiple regression analysis showed good correlation. The type II polyurethane track had the highest decay rate, while the synthetic rubber track had the lowest decay rate. Two years after the track installation, the VOC concentrations measured at 1.5 m above the track, the breathing height of school children, were not significantly higher than the background levels.
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Affiliation(s)
- F H Chang
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan
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