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Lin CK, Lee TH, Liao PC, Lin CL. Cardiac events after using clarithromycin for anti-Helicobacter pylori therapy in patients with coronary artery disease. Medicine (Baltimore) 2023; 102:e35922. [PMID: 37960819 PMCID: PMC10637519 DOI: 10.1097/md.0000000000035922] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 10/12/2023] [Indexed: 11/15/2023] Open
Abstract
Clarithromycin is an antibiotic commonly used to treat Helicobacter pylori infections. The US Food and Drug Administration (FDA) advises caution before prescribing clarithromycin to patients with cardiac diseases. This study aimed to evaluate cardiac events after anti-H pylori treatment in patients with coronary artery disease. A retrospective 5-year study was conducted on outpatients who received anti-H pylori therapy. Among the 7855 patients receiving therapy, 228 patients (2.9%) underwent angiography with coronary artery disease before therapy, and 193 patients received clarithromycin. Clarithromycin users seemed not to be at risk for cardiac events as compared with non-clarithromycin users at 3 months (4.7% vs 2.9%, P = .63) and 1 year (10.9% vs 5.7%, P = .35). Neither life-threatening dysrhythmia nor cardiac death was noted. The risk factors for cardiac events within 3 months after therapy were smoker (OR:5.38, 95% CI:1.39-20.78), and events within 1 year were smoker (OR:3.8, 95% CI:1.41-10.22), and diabetes mellitus (OR:5.68, 95% CI:1.9-16.98). Among patients with coronary artery disease who received anti-H pylori therapy, short-term cardiac events did not increase in clarithromycin users but should be considered in diabetic and smoking patients.
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Affiliation(s)
- Cheng-Kuan Lin
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Far Eastern Memorial Hospital, Banqiao District, New Taipei City, Taiwan
| | - Tzong-Hsi Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Far Eastern Memorial Hospital, Banqiao District, New Taipei City, Taiwan
| | - Pen-Chih Liao
- Division of Cardiology, Center of Cardiovascular Medicine, Far Eastern Memorial Hospital, Banqiao District, New Taipei City, Taiwan
| | - Cheng-Lu Lin
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Far Eastern Memorial Hospital, Banqiao District, New Taipei City, Taiwan
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Chen YS, Wang SY, Liao PC, Chen KC, Wu YW. Myocardial Ischemia after Sepsis-Induced Myocardial Calcification. Acta Cardiol Sin 2022; 38:413-416. [PMID: 35673332 PMCID: PMC9121752 DOI: 10.6515/acs.202205_38(3).20211004a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/04/2021] [Indexed: 06/15/2023]
Affiliation(s)
- Yi-Sheng Chen
- Division of Cardiology, Cardiovascular Medical Center
| | - Shan-Ying Wang
- Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei
| | - Pen-Chih Liao
- Division of Cardiology, Cardiovascular Medical Center
- Chihlee Institute of Technology, New Taipei City
| | - Kuo-Chin Chen
- Division of Cardiology, Cardiovascular Medical Center
| | - Yen-Wen Wu
- Division of Cardiology, Cardiovascular Medical Center
- Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Yeh YT, Hsu JC, Liao PC, Li AH, Liu YH, Chen KC, Chuang W, Ke SR, Chiu YW, Wu YW. Modulators of Mortality Benefit From Peri-Angioplasty Adjunctive Tirofiban in Patients With ST-Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention. Circ J 2021; 85:166-174. [PMID: 33441492 DOI: 10.1253/circj.cj-20-0228] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Studies investigating the modulators of mortality benefit conferred by peri-angioplasty glycoprotein IIb/IIIa inhibitors in ST-elevation myocardial infarction (STEMI) are still lacking.Methods and Results:A prospective database (n=1,025) of consecutive cases undergoing primary percutaneous coronary intervention for STEMI was retrospectively analyzed. For patients in Killip class I, II or III, IV, the multivariate-adjusted hazard ratios of 30-day all-cause mortality associated with adjunctive tirofiban were 3.873 (95% CI 0.504-29.745; P=0.193), 0.550 (95% CI 0.188-1.609; P=0.275), and 0.264 (95% CI 0.099-0.704; P=0.008), respectively. The P value for a linear trend was 0.032. Patients who had a body mass index (BMI) within 22.9-25.0 kg/m2had a significant benefit from tirofiban (adjusted HR 0.344; 95% CI 0.145-0.814; P=0.015) compared to other BMI groups. The P value for a quadratic trend was 0.012. A novel Killip-BMI score (KBS = 2.5 × Killip category - | BMI - 24 |) was calculated to select the beneficial population. A KBS ≥2 was associated with significant mortality benefit, whereas a KBS <0 predicted increased 30-day mortality with tirofiban use. CONCLUSIONS Survival benefit from peri-angioplasty tirofiban therapy for STEMI was positively correlated with the Killip class. Tirofiban should be used cautiously in either underweight or overweight patients. The novel KBS used in this study can guide peri-angioplasty use of adjunctive tirofiban in patients with STEMI undergoing primary angioplasty.
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Affiliation(s)
- Yen-Ting Yeh
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Jung-Chung Hsu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Pen-Chih Liao
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Ai-Hsien Li
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Yuan-Hung Liu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Kuo-Chin Chen
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Wenpo Chuang
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Shin-Rong Ke
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital
| | - Yu-Wei Chiu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital.,Department of Computer Science and Engineering, Yuan Ze University
| | - Yen-Wen Wu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital.,Department of Nuclear Medicine, Far Eastern Memorial Hospital.,National Yang-Ming University School of Medicine.,Department of Nuclear Medicine and Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine
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Lin CC, Lee PY, Chen KC, Liao PC, Hsu JC, Li AH. Clinical, Demographic, and Biochemical Characteristics of Patients with Acute ST-Segment Elevation Myocardial Infarction: An Analysis of Acute Coronary Syndrome Registry Data of a Single Medical Center from 2005 to 2016. Acta Cardiol Sin 2020; 36:1-7. [PMID: 31903002 DOI: 10.6515/acs.202001_36(1).20190704d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background ST-segment elevation myocardial infarction (STEMI) is one of the leading causes of morbidity and mortality in developed countries. Therefore, understanding the prevalence and trends of major risk factors may facilitate primary and secondary prevention of STEMI. Methods In the present study, 2446 consecutive patients with STEMI admitted to Far Eastern Memorial Hospital from 2005 to 2016 were enrolled. A comprehensive analysis of the prevalence, distribution, and trends over time of major risk factors as well as Framingham risk scores of all patients was performed. Results The most prevalent risk factors were male sex, hypertension (HTN), smoking, age, dyslipidemia, and diabetes mellitus. Furthermore, 95%-97% of the patients had at least one modifiable risk factor, and < 1% of the patients did not have any identifiable risk factors. The prevalence trends of smoking, HTN, dyslipidemia, and metabolic syndrome increased significantly from 2005 to 2016. Seasonal variation analysis revealed a 15% increase in STEMI cases between January and March compared with those between April and December. Isolated low high- density lipoprotein-cholesterol syndrome was the second most common type of dyslipidemia, with a prevalence rate of 16.6%. Moreover, only 56.8% of the male and 32% of the female patients were in the Framingham high-risk group. Conclusions A high prevalence rate and an increasing trend of modifiable risk factors resulted in a high number of STEMI cases at our hospital. Controlling modifiable risk factors and improving nontraditional risk factor detection could facilitate primary and secondary preventions for STEMI.
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Affiliation(s)
- Chun-Chung Lin
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Pei-Yu Lee
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Kuo-Chin Chen
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Pen-Chih Liao
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Jung-Cheng Hsu
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Ai-Hsien Li
- Division of Cardiology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
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Huang CC, Hsu JC, Wu YW, Ke SR, Huang JH, Chiu KM, Liao PC. Implementation of extracorporeal membrane oxygenation before primary percutaneous coronary intervention may improve the survival of patients with ST-segment elevation myocardial infarction and refractory cardiogenic shock. Int J Cardiol 2018; 269:45-50. [DOI: 10.1016/j.ijcard.2018.07.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 06/03/2018] [Accepted: 07/03/2018] [Indexed: 11/15/2022]
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Tsai LK, Lin HJ, Chua SK, Liao PC, Yang YP, Chou PC, Lee CW, Lin MJ, Chen HM, Yeh JT, Li YH. Real-World Experience with Idarucizumab to Reverse Anticoagulant Effect in Dabigatran-Treated Patients: Report of 11 Cases from Taiwan. J Stroke Cerebrovasc Dis 2018; 27:e27-e33. [DOI: 10.1016/j.jstrokecerebrovasdis.2017.09.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/12/2017] [Accepted: 09/23/2017] [Indexed: 11/28/2022] Open
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Liu CW, Liao PC, Chen KC, Hsu JC, Tu CM, Wu YW, Li AH, Ke SR, Lin JL. SYNTAX Score of Infarct-Related Artery Other Than the Number of Coronary Balloon Inflations and Deflations as an Independent Predictor of Contrast-Induced Acute Kidney Injury in Patients with ST-Segment Elevation Myocardial Infarction. Acta Cardiol Sin 2017; 33:362-376. [PMID: 29033507 DOI: 10.6515/acs20161130a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Although remote ischemic post-conditioning (RIPC) has been shown to prevent contrast-induced acute kidney injury (CIAKI) in patients with acute coronary syndrome, its efficacy in patients with ST-segment elevation myocardial infarction (STEMI) remains unclear. We examined the relationship among balloon inflations and deflations (BID) times, SYNTAX score of infarction-related artery (SI), periprocedural complications, and CIAKI in STEMI patients undergoing primary percutaneous coronary intervention (pPCI). METHODS Patients with STEMI undergoing pPCI with Mehran risk score (MRS) ≥ 5 were enrolled between February 2007 and September 2012. The study end point was the development of CIAKI. RESULTS Of 206 patients, the median age was 65 years [interquartile range (IQR): 55-77] with 72.8% male and Mehran risk score (MRS) 8 (IQR: 6-12). Receiver operating characteristic curve showed that BID times > 9 times or SI > 10 was the best cut-off associated with CIAKI. In univariate analysis, significant association with CIAKI existed in BID > 9 times [odds ratio (OR): 3.106, 95% confidence interval (CI): 1.284-7.513, p = 0.012] and SI > 10 (OR: 3.909, 95% CI: 1.570-9.735, p = 0.003). Other variables associated with CIAKI included creatinine, hemoglobin, angiotensin converting enzyme inhibitor or angiotensin receptor blocker use at discharge. In multivariate analysis, SI > 10 remained an independent predictor of CIAKI in different adjustment model, even on top of MRS (adjusted OR: 3.498, 95% CI: 1.086-11.268, p = 0.036). CONCLUSIONS Vascular complexity of infarct-related artery rather than higher BID times (> 9) was the major determinant of the development of CIAKI after pPCI in STEMI patients.
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Affiliation(s)
- Cheng-Wei Liu
- Department of Internal Medicine, Tri-Service General Hospital, Songshan Branch, National Defense Medical Center, Taipei
| | - Pen-Chih Liao
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Kuo-Chin Chen
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Jung-Cheng Hsu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Chung-Ming Tu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan.,Chihlee University of Technology
| | - Yen-Wen Wu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan.,Departments of Internal Medicine.,Departments of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei.,Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City.,National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Ai-Hsien Li
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Shin-Rong Ke
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
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Liu CW, Liao PC, Chen KC, Hsu JC, Li AH, Tu CM, Wu YW. Baseline Hemoglobin Levels Associated with One-Year Mortality in ST-Segment Elevation Myocardial Infarction Patients. Acta Cardiol Sin 2016; 32:656-666. [PMID: 27899852 DOI: 10.6515/acs20160106a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND The association between hemoglobin (Hb) levels and mortality in patients with ST-segment elevation myocardial infarction (STEMI) remains controversial. The purpose of this study was to examine the mortality among STEMI patients with anemia or erythrocytosis, and further establish the relationship between mortality and the increment of Hb level. METHODS Between 2006 and 2012, 951 consecutive patients with STEMI undergoing primary percutaneous coronary intervention in a medical center in Northern Taiwan were enrolled in our study, including 535 patients with normal Hb level, 148 with anemia (male Hb ≤ 13 g/dl, female ≤ 12) and 268 with erythrocytosis (male Hb ≥ 16, female ≥ 15). RESULTS Patients in the anemia group were the oldest, and had higher morbidity than the normal Hb group, followed by the erythrocytosis group. In regression analyses, neither anemia nor erythrocytosis was associated with 30-day and 1-year mortality. Each 1-g/dl increment of Hb level was not associated with 30-day mortality both in patients with anemia or erythrocytosis. However, it was associated with a decreased risk of 1-year mortality in anemic patients [hazard ratio (HR): 0.756, 95% confidence interval (CI): 0.608-0.938, p = 0.011] and an increased risk of 1-year mortality in those with erythrocytosis (HR: 2.086, 95%CI: 1.106-3.937, p = 0.023). In multivariate analysis, each 1-g/dl increment of Hb level was associated with 1-year mortality both in anemic patients and those with erythrocytosis (HR: 0.788, 95%CI: 0.621-0.999, p = 0.049; HR: 2.302, 95%CI: 1.051-5.04, p = 0.037). CONCLUSIONS Higher hemoglobin levels in STEMI patients with anemia were associated with decreased risks of 1-year mortality, whereas higher hemoglobin levels in those with erythrocytosis were associated with increased risks of one-year mortality.
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Affiliation(s)
- Cheng-Wei Liu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Department of Internal Medicine, Tri-Service General Hospital, Songshan Branch; ; National Defense Medical Center
| | - Pen-Chih Liao
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
| | - Kuo-Chin Chen
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
| | - Jung-Cheng Hsu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Chihlee Institute of Technology
| | - Ai-Hsien Li
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
| | - Chung-Ming Tu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Chihlee Institute of Technology
| | - Yen-Wen Wu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Departments of Internal Medicine; ; Departments of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei; ; Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City; ; National Yang-Ming University School of Medicine, Taipei, Taiwan
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Liu CW, Liao PC, Chen KC, Chiu YW, Liu YH, Ke SR, Wu YW. Relationship of serum uric acid and Killip class on mortality after acute ST-segment elevation myocardial infarction and primary percutaneous coronary intervention. Int J Cardiol 2016; 226:26-33. [PMID: 27780079 DOI: 10.1016/j.ijcard.2016.10.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 10/06/2016] [Accepted: 10/09/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND There is conflicting information regarding the association between hyperuricemia and survival in STEMI patients. Our study examined the interaction between hyperuricemia and Killip class on mortality of STEMI patients. METHODS We analyzed 951 consecutive STEMI patients between February 2006 and September 2012. Hyperuricemia was defined as SUA of at least 7mg/dL in males and 6mg/dL in females. Killip class I patients were divided into hyperuricemia and normouricemia groups. RESULTS The Killip class I hyperuricemia and normouricemia groups had similar baseline and procedural characteristics, but the hyperuricemia group had significantly greater BMI, serum creatinine, and SUA, and a lower TIMI risk score (2, IQR: 1-4 vs. 3, IQR: 2-4, p=0.019). The hyperuricemia group also had greater 30-day and 1-year mortality rates (2.9% vs. 0.3%, p=0.022; 6.5% vs. 1.1%, p=0.002, respectively). However, hyperuricemia was not associated with mortality of patients in Killip classes II-IV or in the overall study population. Hyperuricemia was associated with increased mortality in subgroups of patients who were at least 65years-old, male, had BMI of 25kg/m2 or less, were in Killip class I, without diabetes, and who did not receive intra-aortic balloon pump support. Hyperuricemia interacted with Killip class I in increasing the risk for 1-year mortality (p for interaction=0.038). CONCLUSIONS Hyperuricemia increased the 1-year mortality of STEMI patients in Killip class I, but not of patients in Killip classes II-IV. An interaction of hyperuricemia and Killip class significantly affects the mortality of STEMI patients.
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Affiliation(s)
- Cheng-Wei Liu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Internal Medicine, Tri-service General Hospital, Songshan Branch, National Defense Medical Center, Taipei, Taiwan; Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taiwan
| | - Pen-Chih Liao
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Kuo-Chin Chen
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Yu-Wei Chiu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Computer Science & Engineering, Yuan Ze University, Taiwan
| | - Yuan-Hung Liu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Shin-Rong Ke
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
| | - Yen-Wen Wu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Nuclear Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan; National Yang-Ming University School of Medicine, Taipei, Taiwan
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Abstract
UNLABELLED Chest pain is the typical symptom of myocardial infarction (MI), and there are many atypical manifestations such as stomachache or dyspnea. Headache is a rare presentation of MI, which has specifically been termed "cardiac cephalalgia" or "cardiac cephalgia". In this article, we have reported a case of sudden onset headache and neck pain, of whom MI was confirmed by electrocardiography, cardiac markers, and coronary angiogram. The patient's headache subsided dramatically after coronary angioplasty, and it had not recurred in the following one year. Additionally, diagnostic clues and possible mechanisms of cardiac cephalalgia are discussed as well. KEY WORDS Headache • Cardiac cephalgia • Cardiac cephalalgia • Myocardial infarction.
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Affiliation(s)
- Chi-Cheng Huang
- Division of Cardiology, Cardiovascular Center, Far-Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Pen-Chih Liao
- Division of Cardiology, Cardiovascular Center, Far-Eastern Memorial Hospital, New Taipei City, Taiwan
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Lai CC, Chang KC, Liao PC, Wu CT, Lai WT, Wu CJ, Chang SC, Mar GY. Effects of Door-to-Balloon Times on Outcomes in Taiwanese Patients Receiving Primary Percutaneous Coronary Intervention: A Report of Taiwan Acute Coronary Syndrome Full Spectrum Registry. Acta Cardiol Sin 2016; 31:215-25. [PMID: 27122873 DOI: 10.6515/acs20140721e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PURPOSE The impact of door-to-balloon (DTB) time on patient outcomes is unclear in a Taiwanese population receiving primary percutaneous coronary intervention (PCI). The study aimed to investigate the relationship between stratified DTB times and outcomes through analysis of the database from the Taiwan acute coronary syndrome full spectrum registry. METHODS Relevant data were collected from case report forms of patients receiving primary PCI who were categorized as group 1, 2, 3, and 4 according to the DTB time < 45, 45-90, 91-135, and > 135 minutes, respectively. The differences were analyzed by using ANOVA and Kaplan-Meier analyses. RESULTS There were significant variations in DTB times at baseline, which included patients salvaged at centers, patients with prior cardiovascular disease, and those patients with different coronary artery flows (p < 0.01) separated into 4 groups (n = 189, 443, 299, and 401, respectively). The in-hospital adverse event rates were identical among the 4 groups except for a higher rate of acute renal failure and a longer hospital stay observed in group 4 (p < 0.01). The results showed no decrease in the incidences of repeated revascularization, major adverse cardiac event, or cardiovascular composite at 1 year in group 1. CONCLUSIONS This study suggested that the DTB time is not a good determinant for outcomes in Taiwanese patients receiving primary PCI. KEY WORDS Acute myocardial infarction; Cardiovascular outcome; Door-to-balloon time; Myocardial ischemia; Percutaneous coronary intervention.
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Affiliation(s)
- Chi-Cheng Lai
- Cardiovascular Center, Kaohsiung Veterans General Hospital; ; Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung; ; School of Medicine, National Yang-Ming University; ; Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei
| | - Kuan-Cheng Chang
- Division of Cardiology, Department of Medicine, China Medical University Hospital, Taichung
| | - Pen-Chih Liao
- Division of Cardiology, Cardiovascular Center, Far Eastern Memorial Hospital, Taipei
| | - Chia-Tung Wu
- Cardiovascular Department, Chang-Gung Memorial Hospital, Taoyuan
| | - Wen-Ter Lai
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital; ; Faculty of Medicine, College of Medicine, Kaohsiung, Medical University
| | - Chiung-Jen Wu
- Cardiovascular Department, Chang-Gung Memorial Hospital, Taoyuan; ; Kaohsiung Chang Gung Memorial Hospital, Kaohsiung
| | - Shu-Chen Chang
- Division of Biostatistics, Institute of Public Health, National Yang-Ming University, Taipei
| | - Guang-Yuan Mar
- Cardiovascular Center, Kaohsiung Veterans General Hospital; ; College of Health and Nursing, MeiHo University, Pingtung, Taiwan
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Yeh YT, Liu CW, Li AH, Ke SR, Liu YH, Chen KC, Liao PC, Wu YW. Rapid Early Triage by Leukocytosis and the Thrombolysis in Myocardial Infarction (TIMI) Risk Score for ST-Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention: An Observational Study. Medicine (Baltimore) 2016; 95:e2857. [PMID: 26886652 PMCID: PMC4998652 DOI: 10.1097/md.0000000000002857] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The clinical utility of leukocytosis in risk assessment for ST-elevation myocardial infarction (STEMI) is still unclear. We aim to demonstrate the prognostic value of leukocyte counts independent from traditional risk factors and the TIMI risk score (TRS) for STEMI and to propose a practical model comprising leukocyte count for early triage in STEMI undergoing primary angioplasty. A prospective database (n = 796) of consecutive STEMI cases receiving primary angioplasty at a tertiary medical center was retrospectively analyzed in the period from February 1, 2007 through December 31, 2012. Primary endpoints were 30-day and 1-year mortality. Propensity score-adjusted Cox regression models and subdivision analysis were performed. Leukocytosis group (n = 306) had higher 30-day mortality (5.9% vs 3.1%, P = 0.048) and 1-year mortality (9.2% vs 5.1%, P = 0.022). After adjustment by propensity score and TRS, leukocyte count (per 10/μL) was an independent predictor of 1-year mortality (HR: 1.086, 95% CI: 1.034-1.140, P = 0.001). Subdivision analysis demonstrated the correlation between leukocytosis and higher 1-year mortality within both high and low TRS strata (divided by 4, the median of TRS). Additionally, 24% (191 out of 796) of patients were characterized by nonleukocytosis and TRS < 4, having 0% of mortality rate at 1-year follow-up. In conclusion, leukocyte count is an independent prognostic factor adding incremental value to TRS for STEMI. Nonleukocytosis in conjunction with TRS < 4 identifies a large patient group at extremely low risk and thus provides rapid early triage for STEMI patients undergoing primary PCI. This finding is worth validation in the future.
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Affiliation(s)
- Yen-Ting Yeh
- From the Cardiology Division of Cardiovascular Medical Center (Y-TY, C-WL, A-HL, S-RK, Y-WL, K-CC, P-CL, Y-WW), Department of Nuclear Medicine (Y-WW), Far Eastern Memorial Hospital, New Taipei City, National Yang-Ming University School of Medicine, Taipei, Taiwan (Y-WW), National Defense Medical Center (C-WL), Department of Nuclear Medicine and Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine (Y-WW), Taipei, Taiwan
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Liu CW, Liao PC, Wu YW, Ke SR. Hyperuricemia as an Outcome Predictor in Patients with ST-Segment Elevation Myocardial Infarction: Too Good to be True? Acta Cardiol Sin 2015; 31:87-8. [PMID: 27122853 DOI: 10.6515/acs20140721c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Cheng-Wei Liu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Department of Internal Medicine, Tri-Service General Hospital, Songshan Branch; ; National Defense Medical Center, Taipei
| | - Pen-Chih Liao
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
| | - Yen-Wen Wu
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City; ; Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City; ; National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Shin-Rong Ke
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, New Taipei City
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Chang JW, Chen HL, Su HJ, Liao PC, Lee CC. Biochemical study of retired pentachlorophenol workers with and without following dietary exposure to PCDD/Fs. Chemosphere 2012; 88:813-819. [PMID: 22579452 DOI: 10.1016/j.chemosphere.2012.03.087] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Revised: 03/11/2012] [Accepted: 03/31/2012] [Indexed: 05/31/2023]
Abstract
PCDD/Fs are found as impurities in commercial pesticide sodium pentachlorophenol (Na-PCP) salt. We compared, using multivariate logistic regression analysis adjusted for confounding factors, serum PCDD/F levels and biochemical examinations of retired Na-PCP workers and other inhabitants living near a closed Na-PCP plant that discharged PCP-contaminated wastewater into a nearby pond in Tainan, Taiwan. In this cross-sectional study from October 2006 through May 2009, 1167 participants were divided into groups according to their occupational (retired Na-PCP plant workers versus other residents) and dietary exposure (eating polluted fish versus not eating polluted fish) to PCDD/Fs, and a general population from a large-scale survey. Serum PCDD/F levels were significantly different between these groups (range: from 22.9±10.0pg WHO(98)-TEQ(DF) g(-1) lipid in the general population to 109.6±94.5pg WHO(98)-TEQ(DF) g(-1) lipid in retired Na-PCP workers eating polluted seafood; P(trend)<0.001). Distinct patterns of PCDD/Fs congener profiles, showing a significantly higher proportion of 1,2,3,7,8-PeCDD, 1,2,3,6,7,8-HxDD, and less 2,3,4,6,7,8-HpCDF, OCDF, were also found among workers and residents with different serum PCDD/F levels versus the general population. After adjusting for confounding factors, glucose (adjusted odds ratio [AOR] 7.22 [95% CI: 4.04-12.90]), triglycerides (AOR 4.31 [95% CI: 2.57-7.22]), blood urea nitrogen (AOR 2.90 [95% CI: 1.58-5.33]), creatine (AOR 5.83 [95% CI: 1.12-30.30]) and total protein (AOR 3.74 [95% CI: 1.91-7.31]) levels in retired workers were significantly higher than in the reference group. Occupational exposure to PCDD/Fs is associated with biochemical abnormalities that may persist for years after serum PCDD/F levels have declined.
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Affiliation(s)
- J W Chang
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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15
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Hsin HT, Wu CF, Liao PC, Lin PC, Chen LY. Upstream tirofiban reduces reperfusion cardiac arrhythmias in patients of acute ST-elevation myocardial infarction undergoing primary percutaneous coronary intervention. Int J Cardiol 2011; 146:292-4. [PMID: 21095030 DOI: 10.1016/j.ijcard.2010.10.088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 10/23/2010] [Indexed: 10/18/2022]
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16
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Chang JW, Ou HY, Chen HL, Guo HR, Liao PC, Lee CC. Interrelationship between exposure to PCDD/Fs and hypertension in metabolic syndrome in Taiwanese living near a highly contaminated area. Chemosphere 2010; 81:1027-1032. [PMID: 20850865 DOI: 10.1016/j.chemosphere.2010.08.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 08/14/2010] [Accepted: 08/27/2010] [Indexed: 05/29/2023]
Abstract
Metabolic syndrome (MetS) consists of a constellation of metabolic abnormalities that confer increased risk of cardiovascular disease. There is a positive correlation between exposure to persistent organic pollutants and MetS. We examine the association between PCDD/Fs and MetS components in 1490 non-diabetic persons living near a highly dioxin-contaminated area. We used factor analysis, with a set of core variables considered central features of MetS and PCDD/Fs, to group similar risk factors. Serum PCDD/Fs were positively and significantly correlated with the number of MetS components. Four risk factors-lipidemia, blood pressure, body size, and glycemia-accounted for 72.6% of the variance in the 10 core factors, and PCDD/Fs were linked to MetS through shared correlations with high blood pressure. After adjusting for confounding factors, we found that diastolic blood pressure (β=0.018; p=0.006), glucose (β=0.013; p=0.046), and waist circumference (β=0.721; p=0.042) significantly increased with increasing serum PCDD/F levels. We found significant trends for associations between metabolic syndrome and serum low-chlorinated PCDD/Fs. The highest quintiles of 2,3,4,7,8-PeCDF, 1,2,3,6,7,8-HxCDF and 2,3,7,8-TCDD had the top three adjusted ORs (95% CI) of 3.5 (1.9-6.3), 2.9 (1.7-4.9) and 2.8 (1.6-4.9), respectively. We also found a slight monotonic relationship between serum PCDD/Fs and the prevalence of MetS, especially when the serum dioxin level was higher than 25.4pg WHO(98)-TEQ(DF)g(-1) lipid (the fourth Quintile). We hypothesize that high-dose exposure to PCDD/Fs is a blood pressure-related factor that raises MetS risk.
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Affiliation(s)
- J W Chang
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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17
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Lai CL, Fan CM, Liao PC, Tsai KC, Yang CY, Chu SH, Chien KL. Impact of an audit program and other factors on door-to-balloon times in acute ST-elevation myocardial infarction patients destined for primary coronary intervention. Acad Emerg Med 2009; 16:333-42. [PMID: 19456296 DOI: 10.1111/j.1553-2712.2009.00372.x] [Citation(s) in RCA: 18] [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: 11/27/2022]
Abstract
OBJECTIVES This before-after study investigated the association between an audit program and door-to-balloon times in patients with acute ST-elevation myocardial infarction (STEMI) and explored other factors associated with the door-to-balloon time. METHODS An audit program that collected time data for essential time intervals in acute STEMI was developed with data feedback to both the Department of Emergency Medicine and the Department of Cardiology. The door-to-balloon times for 76 consecutive acute STEMI patients were collected from February 16, 2007, through October 31, 2007, after the implementation of the audit program, as the intervention group. The control group was defined by 104 consecutive acute STEMI patients presenting from April 1, 2006, through February 15, 2007, before the audit was applied. A multivariate linear regression model was used for analysis of factors associated with the door-to-balloon time. RESULTS The geometric mean 95% CI of the door-to-balloon time decreased from 164.9 (150.3, 180.9) minutes to 141.9 (127.4, 158.2) minutes (p = 0.039) in the intervention phase. The median door-to-balloon time was 147.5 minutes in the control group and 136.0 minutes in the intervention group (p = 0.09). In the multivariate regression model, the audit program was associated with a shortening of the door-to-balloon time by 35.5 minutes (160.4 minutes vs. 195.9 minutes, p = 0.004); female gender was associated with a mean delay of 58.4 minutes (208.9 minutes vs. 150.5 minutes; p = 0.001); posterolateral wall infarction was associated with a mean delay of 70.5 minutes compared to anterior wall infarction (215.4 minutes vs. 144.9 minutes; p = 0.037) and a mean delay of 69.5 minutes compared to inferior wall infarction (215.4 minutes vs. 145.9 minutes; p = 0.044). The use of a glycoprotein IIb/IIIa inhibitor was associated with a 46.1 minutes mean shortening of door-to-balloon time (155.7 minutes vs. 201.8 minutes; p < 0.001). CONCLUSIONS The implementation of an audit program was associated with a significant reduction in door-to-balloon times among patients with acute STEMI. In addition, female patients, posterolateral wall infarction territory, and nonuse of glycoprotein IIb/IIIa inhibitor were associated with longer door-to-balloon times.
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Affiliation(s)
- Chao-Lun Lai
- Cardiovascular Center, Far Eastern Memorial Hospital, Taiwan
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Yang CM, Lin MF, Liao PC, Yeh HW, Chang BV, Tang TK, Cheng C, Sung CH, Liou ML. Comparison of antimicrobial resistance patterns between clinical and sewage isolates in a regional hospital in Taiwan. Lett Appl Microbiol 2009; 48:560-5. [PMID: 19291216 DOI: 10.1111/j.1472-765x.2009.02572.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To compare bacterial populations and antimicrobial resistance patterns between clinical and sewage isolates from a regional hospital in northern Taiwan. The dissemination of antibiotic-resistant bacteria from hospital compartments to the hospital sewage treatment plant was examined. METHODS AND RESULTS A total of 1020 clinical isolates and 435 sewage isolates were collected between July and September 2005. The percentages of Gram-negative bacteria from the clinical and sewage isolates were 87.2% and 91.0%, respectively (P = 0.033). Escherichia coli were the leading bacterial isolates in both groups. Antimicrobial susceptibility testing showed a significant difference (P < 0.001) in resistance to ampicillin (85.6% vs 94.1%), ampicillin/sulbactam (31.7% vs 55.4%), cefazolin (29.2% vs 71.5%) and cefuroxime (20.7% vs 61.9%) between clinical and sewage coliform isolates, respectively. CONCLUSIONS The sewage isolates had higher antimicrobial resistance rates than the clinical isolates from the same hospital. SIGNIFICANCE AND IMPACT OF THE STUDY The low efficacy of the hospital sewage treatment may contribute to the dissemination of multidrug resistant bacteria from this hospital compartments to the environment. Practices which limit the disposal of antimicrobial agents into the wastewater system may be the possible measure to prevent the selection of multidrug-resistant bacteria from sewage treatment plants.
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Affiliation(s)
- C M Yang
- Department of Health, Hsin-Chu General Hospital, Hsin-Chu, Taiwan
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19
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Chen HL, Su HJ, Hsu JF, Liao PC, Lee CC. High variation of PCDDs, PCDFs, and dioxin-like PCBs ratio in cooked food from the first total diet survey in Taiwan. Chemosphere 2008; 70:673-81. [PMID: 17692359 DOI: 10.1016/j.chemosphere.2007.06.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 06/21/2007] [Accepted: 06/24/2007] [Indexed: 05/16/2023]
Abstract
This study determined the levels of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs), and dioxin-like polychlorinated biphenyls (dl-PCBs) in 240 individual food samples, belonging to 37 different foodstuffs in first total diet study (TDS) in Taiwan. The foods were collected from markets located in eight cities or counties around Taiwan. The food was cooked in a laboratory according to recipes typically used in Taiwan. In this study, PCDD/Fs were lower than the limits proposed by the European Union (EU) regulation for commercialized food, except for a notable PCDD/Fs level in ducks (3.660 pg WHO-TEQ/g, fat) obtained from central Taiwan. We hypothesize the duck meat might be probably polluted via emission of a fly ash recycling plant located near the duck farms. In addition to fish, most foods had high PCDD/Fs to dl-PCBs ratio. Needle fish and sea perch had relatively lower PCDD/Fs and dl-PCBs levels compared with those in other fish. Data from this study can be utilized for further consideration about dietary intake.
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Affiliation(s)
- H L Chen
- Department of Industrial Safety and Health, Hung Kuang University, Taichung, Taiwan
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20
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Hsin HT, Chui YW, Yang CY, Yeih DF, Lai CL, Liao PC. S32-6 THE APPLICATION OF OXYGEN SATURATION OF CENTRAL VENOUS BLOOD (SCVO2) IN COMPLICATED ACUTE CORONARY SYNDROME AS A PROBABLE DISEASE MONITOR. Int J Cardiol 2007. [DOI: 10.1016/s0167-5273(08)70492-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Lee CC, Lin WT, Liao PC, Su HJ, Chen HL. High average daily intake of PCDD/Fs and serum levels in residents living near a deserted factory producing pentachlorophenol (PCP) in Taiwan: influence of contaminated fish consumption. Environ Pollut 2006; 141:381-6. [PMID: 16213641 DOI: 10.1016/j.envpol.2005.08.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Accepted: 08/02/2005] [Indexed: 05/04/2023]
Abstract
An abandoned pentachlorophenol plant and nearby area in southern Taiwan was heavily contaminated by dioxins, impurities formed in the PCP production process. The investigation showed that the average serum PCDD/Fs of residents living nearby area (62.5 pg WHO-TEQ/g lipid) was higher than those living in the non-polluted area (22.5 and 18.2 pg WHO-TEQ/g lipid) (P<0.05). In biota samples, average PCDD/F of milkfish in sea reservoir (28.3 pg WHO-TEQ/g) was higher than those in the nearby fish farm (0.15 pg WHO-TEQ/g), and Tilapia and shrimp showed the similar trend. The average daily PCDD/Fs intake of 38% participants was higher than 4 pg WHO-TEQ/kg/day suggested by the world health organization. Serum PCDD/F was positively associated with average daily intake (ADI) after adjustment for age, sex, BMI, and smoking status. In addition, a prospective cohort study is suggested to determine the long-term health effects on the people living near factory.
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Affiliation(s)
- C C Lee
- Department of Environmental and Occupational Health, Medical College, National Cheng Kung University, Tainan, Taiwan
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22
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Lin YS, Lin CF, Fang YT, Kuo YM, Liao PC, Yeh TM, Hwa KY, Shieh CCK, Yen JH, Wang HJ, Su IJ, Lei HY. Antibody to severe acute respiratory syndrome (SARS)-associated coronavirus spike protein domain 2 cross-reacts with lung epithelial cells and causes cytotoxicity. Clin Exp Immunol 2005; 141:500-8. [PMID: 16045740 PMCID: PMC1809466 DOI: 10.1111/j.1365-2249.2005.02864.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [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] [Indexed: 12/16/2022] Open
Abstract
Both viral effect and immune-mediated mechanism are involved in the pathogenesis of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) infection. In this study, we showed that in SARS patient sera there were autoantibodies (autoAbs) that reacted with A549 cells, the type-2 pneumocytes, and that these autoAbs were mainly IgG. The autoAbs were detectable 20 days after fever onset. Tests of non-SARS-pneumonia patients did not show the same autoAb production as in SARS patients. After sera IgG bound to A549 cells, cytotoxicity was induced. Cell cytotoxicity and the anti-epithelial cell IgG level were positively correlated. Preabsorption and binding assays indicated the existence of cross-reactive epitopes on SARS-CoV spike protein domain 2 (S2). Furthermore, treatment of A549 cells with anti-S2 Abs and IFN-gamma resulted in an increase in the adherence of human peripheral blood mononuclear cells to these epithelial cells. Taken together, we have demonstrated that the anti-S2 Abs in SARS patient sera cause cytotoxic injury as well as enhance immune cell adhesion to epithelial cells. The onset of autoimmune responses in SARS-CoV infection may be implicated in SARS pathogenesis.
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Affiliation(s)
- Y S Lin
- Department of Microbiology and Immunology, National Cheng Kung University Medical College, Tainan, Taiwan
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23
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Chen HL, Su HJ, Liao PC, Chen CH, Lee CC. Serum PCDD/F concentration distribution in residents living in the vicinity of an incinerator and its association with predicted ambient dioxin exposure. Chemosphere 2004; 54:1421-1429. [PMID: 14659944 DOI: 10.1016/j.chemosphere.2003.10.033] [Citation(s) in RCA: 19] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The aim of this study was to evaluate the serum polychlorinated dibenzo-p-dioxin (PCDD) and dibenzofuran (PCDF) concentration distribution in residents living in the vicinity of an incinerator and its association with annual ambient dioxin exposure predicted by an atmospheric dispersion model. A municipal waste incinerator in Northern Taiwan was chosen for this study. This incinerator had been in operation for 6 years at the time of this study. Using the incinerator site as the center, based on the simulated ambient annual average PCDD/F concentrations. Ninety-five volunteers, all live within a radius of 5 km from the incinerator for at least 5 years, who had no occupational exposure potential, were selected based on the population distribution in each district. The average serum PCDD/F concentration for these subjects living within four zones was about 14 pg I-TEQ/g lipid. The serum distribution levels of people of the four study zones, however, were not consistent with the predicted ambient levels. Results also suggest that ambient exposure might not be the most important contributor to serum concentrations when compared to other exposure sources, such as dietary intake.
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Affiliation(s)
- H L Chen
- The Institute of Basic Medical Sciences, Taiwan, ROC
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24
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Li AH, Liao PC, Chu SH. P10-06 An uncommon cause of acute coronary syndrome: coronary arteriovenous fistula — A case report. Int J Cardiol 2004. [DOI: 10.1016/s0167-5273(04)80227-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Affiliation(s)
- W B Chung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung 912, Taiwan, Republic of China
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26
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Abstract
Two experiments were conducted to demonstrate the efficacy of a commercial foot-and-mouth disease (FMD) vaccine in pigs born to well-vaccinated sows at various ages with a single injection under field conditions. The first experiment showed that single dose vaccination of pigs could be conducted at an age younger than 10 weeks. Second experiment demonstrated that pigs vaccinated once at the age of 8 weeks had mean serum neutralization (SN) titer of 1.89+/-0.95 log(10)SN(50) with full protection by challenge test at the age of 24 weeks. Results indicate that the most appropriate age for single dose FMD vaccination in pigs born to well-vaccinated sows would be at 8 weeks.
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Affiliation(s)
- P C Liao
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung 912, Taiwan ROC
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27
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Chung WB, Liao PC, Yang PC, Chen SP, Jong MH, Sheu TW. Surveillance of FMD virus non-structural protein antibodies in pig populations involved in an eradication programme. Vet Rec 2003; 152:595-7. [PMID: 12762489 DOI: 10.1136/vr.152.19.595] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- W B Chung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
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28
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Liao PC, Kuo YM, Chang YC, Lin C, Cherng CFG, Yu L. Striatal formation of 6-hydroxydopamine in mice treated with pargyline, pyrogallol and methamphetamine. J Neural Transm (Vienna) 2003; 110:487-94. [PMID: 12721810 DOI: 10.1007/s00702-002-0829-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Formation of 6-hydroxydopamine (6-OHDA) has been posited in the striatum following methamphetamine treatment and plays a critical role in methamphetamine-induced nigrostriatal dopaminergic toxicity. We used high performance liquid chromatography electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS) to determine the formation of 6-OHDA by the treatments of methamphetamine combined with pargyline, a monoamine oxidase inhibitor, and pyrogallol, a catechol-O-methyl-transferase inhibitor, in female C57BL/6J mouse striatum. A substantial amount of 6-OHDA (9.9 +/- 0.7 pg/mg wet tissue) was detected in mice treated with pargyline (100 mg/kg) and pyrogallol (25 mg/kg) in combination. Greater striatal 6-OHDA levels were observed in mice treated with combined pargyline, pyrogallol and methamphetamine (50 mg/kg) as compared to mice treated with combined pargyline and pyrogallol. However, mice treated with pargyline and pyragollol in combination followed by one and two doses of methamphetamine exhibited comparable striatal 6-OHDA levels (23.2 +/- 4.3, 27.3 +/- 1.3 pg/mg wet tissue) in our protocol. We conclude that blockade of the primary metabolic pathways of dopamine by inhibiting both monoamine oxidase and catechol-O-methyl-transferase activities is sufficient to induce 6-OHDA formation in the striatum. Acute 6-OHDA accumulation in the striatum can be potentiated by methamphetamine, a potent dopamine releaser, administration following such metabolic inhibitions.
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Affiliation(s)
- P C Liao
- Department of Environmental and Occupational Health, National Health Research Institutes, Kaoshung, Taiwan
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29
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Liao PC, Lai LP, Lin JL, Huang SKS. Inappropriate defibrillator discharges caused by an unusual interaction between an implantable cardioverter defibrillator and a pacemaker. J Cardiovasc Electrophysiol 2002; 13:1178-9. [PMID: 12475114 DOI: 10.1046/j.1540-8167.2002.01178.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Pen-Chih Liao
- Department of Internal Medicine. National Taiwan University Hospital, Taipei, Taiwan
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30
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Chung WB, Liao PC, Chen SP, Yang PC, Lin YL, Jong MH, Sheu TW. Optimization of foot-and-mouth disease vaccination protocols by surveillance of neutralization antibodies. Vaccine 2002; 20:2665-70. [PMID: 12034091 DOI: 10.1016/s0264-410x(02)00201-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
An appropriate immunization program for pigs in a foot-and-mouth disease (FMD) endemic area was proposed based on data analysis obtained from serological surveillance in Taiwan, after an intensive vaccination program. To provide an adequate passive immunity for piglets, gilts that have completed two basic vaccinations must be boosted once before breeding. To achieve an efficient response to the FMD vaccine for piglets born to well vaccinated sows, vaccination need to be delayed until 10-12 weeks of ages for the first immunization, followed by a boost 4 weeks later.
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Affiliation(s)
- W B Chung
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung, Taiwan, ROC.
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31
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Chen SH, Sung WC, Lee GB, Lin ZY, Chen PW, Liao PC. A disposable poly(methylmethacrylate)-based microfluidic module for protein identification by nanoelectrospray ionization-tandem mass spectrometry. Electrophoresis 2001; 22:3972-7. [PMID: 11700728 DOI: 10.1002/1522-2683(200110)22:18<3972::aid-elps3972>3.0.co;2-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The design, fabrication, and analytical use of a poly(methylmethacrylate) (PMMA)-based microfluidic module for nanoelectrospray ionization-tandem mass spectrometry (nano-ESI-MS/MS) were described. The microfluidic module can be mass-produced at low costs and used as a disposable device to generate nano-ESI-MS/MS signals for protein identification from low amounts of protein samples. Compared with commercially available nanospray capillary tips, the module gave comparable signal quality and also offered advantages in convenience and easiness of operation, permitting repeated usage, and disposability.
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Affiliation(s)
- S H Chen
- Department of Chemistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
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32
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Yu L, Liao PC. Sexual differences and estrous cycle in methamphetamine-induced dopamine and serotonin depletions in the striatum of mice. J Neural Transm (Vienna) 2001; 107:419-27. [PMID: 11215753 DOI: 10.1007/s007020070084] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Four consecutive doses (10 mg/kg) of methamphetamine, s.c., produced a substantial striatal dopamine depletion in both sexes of BALB/c and C57BL/6J mice. Male C57BL/6J mice exhibited greater dopamine depletions in the striatum compared to female C57BL/6J mice. In contrast, male and female BALB/c mice demonstrated an equivalent magnitude of striatal dopamine depletion. Regardless of sex, C57BL/6J mice demonstrated approximately 1.4 to 2.2 times greater dopamine depletions in the striatum compared to BALB/c mice. Moreover, methamphetamine caused 4 times greater serotonin depletions in male as opposed to female BALB/c mice while sparing either sex of the C57BL/6J mice. Furthermore, female mice of both strains appeared to have the greatest basal dopamine levels during proestrus and the lowest basal dopamine levels during diestrus. Likewise, female mice of both strains exhibited the lowest dopamine depletions in the striatum when the dosing regimen of methamphetamine started at proestrus whereas the greatest dopamine depletions in the striatum occurred when the regimen started during diestrus. These results suggest that sex hormones and other modulating factors may play a role in methamphetamine-induced dopamine and serotonin neurotoxicity.
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Affiliation(s)
- L Yu
- Institute of Behavioral Medicine, National Cheng Kung University Medical College, Tainan, Taiwan.
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Yu L, Liao PC. Estrogen and progesterone distinctively modulate methamphetamine-induced dopamine and serotonin depletions in C57BL/6J mice. J Neural Transm (Vienna) 2001; 107:1139-47. [PMID: 11129103 DOI: 10.1007/s007020070027] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Intra-striatal infusion of a high dose (100 microg/3 microl) of methamphetamine produced long-lasting depletions of striatal dopamine and serotonin in both male and female mice. Male mice exhibited a greater depletion of striatal dopamine and serotonin than female mice. A similar trend of sexual differences was observed when 4 cumulative doses of methamphetamine were administered systemically. Thus, the sexual differences in methamphetamine-induced neurotoxicity in the striatum are probably not due to their differences in peripheral metabolism of methamphetamine. Moreover, ovariectomized (OVX) mice supplemented with 3 daily doses of estradiol benzoate (EB) at high or physiological levels, 3 daily doses of progesterone (P), and 2 doses of EB followed by 1 dose of P all demonstrated higher striatal dopamine levels following methamphetamine treatment as compared to vehicle-supplemented controls. The OVX mice pretreated with 3 daily doses of P exhibited the highest striatal serotonin levels after methamphetamine administration of all groups. In conclusion, sexual differences observed in methamphetamine-induced striatal neurotoxicity may be modulated by ovarian hormones.
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Affiliation(s)
- L Yu
- Institute of Behavioral Medicine, National Cheng Kung University College of Medicine, Tainan, Taiwan.
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34
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Liao PC, Li CM, Hung CW, Chen SH. Quantitative detection of N(7)-(2-hydroxyethyl)guanine adducts in DNA using high-performance liquid chromatography/electrospray ionization tandem mass spectrometry. J Mass Spectrom 2001; 36:336-343. [PMID: 11312526 DOI: 10.1002/jms.132] [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
High-performance liquid chromatography (HPLC) was combined with electrospray ionization tandem mass spectrometry (ESI-MS/MS) to develop a sensitive and selective method for the quantitative measurement of N(7)-(2-hydroxyethyl)guanine (N(7)-HEG) adducts in DNA obtained from ethylene oxide-exposed biological samples. Selected reaction monitoring (SRM) was used as the detection mode while the fragmentation product ion at m/z 152 generated from the precursor protonated N(7)-HEG (m/z 196) was monitored. The detection limits for N(7)-HEG were estimated by twofold serial dilution and determined to be 4 fmol in neat standard solution and 16 fmol when a matrix effect is considered. When the mass spectrometer was operated in the selected ion monitoring mode using only the first quadrupole (without MS/MS function), the detection limits increased to 128 fmol and 1 pmol (when matrix effect is considered), respectively. A good linear correlation (R(2) = 0.999) was observed for signal intensities obtained by injecting 16 fmol--33 pmol of N(7)-HEG into the HPLC/ESI-MS/MS system. Hep G2 cells were incubated for 8 h with medium containing various concentrations of ethylene oxide (ranging from 0.05 to 5.0 mM). A dose-response relationship was established, indicating that the adduct formation increases with the exposure level. The method shows potential, although the detection limit needs to be lowered for practical applications, for use in monitoring N(7)-HEG formation in other biological systems.
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Affiliation(s)
- P C Liao
- Department of Environmental and Occupational Health, National Cheng Kung Medical College, Tainan 70101, Taiwan.
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35
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Pan TL, Goto S, Lord R, Huang YC, Huang CM, Wang PW, Lin YC, Kawamoto S, Ono K, Liao PC, Lin CL, Lai CY, Chang HL, Lan CH, Lee TH, Wang YC, Wu ML, Jawan B, Cheng YF, Chen ST, Chen CL. Proteome analysis in liver transplantation. Transplant Proc 2001; 33:156. [PMID: 11266756 DOI: 10.1016/s0041-1345(00)01952-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T L Pan
- Department of Surgery and Liver Transplant Program, Chang Gung Memorial Hospital Kaohsiung, Niao Sung, Kaohsiung, Taiwan
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36
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Abstract
Sialoprotein "anti-agglutinin," previously shown to inhibit sperm head-to-head agglutination, is found in both boar epididymal and seminal plasma. The present report characterizes anti-agglutinin by mass spectrometry, by N-terminal amino acid sequence analysis, and by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE) and Western blotting techniques to assess phosphate content of the molecule. Anti-agglutinin had the SDS-PAGE mobility of approximately 25 kDa. By electrospray ionization-mass spectrometry, however, mass spectra of anti-agglutinin were characterized by two major peaks (19,379-19,382 Da and 19,395-19,397 Da) and several minor peaks. Mass spectrometry of tryptic peptide fragments of deglycosylated anti-agglutinin and amino acid sequence analysis revealed that the protein has a unique peptide-mass fingerprinting of fragments (12,668 Da, 5,209 Da, 1,226 Da, and 1,168 Da) and a novel N-terminal amino acid sequence (KTDDY AISGA KEEEF YDYME ELYAV), respectively. Additionally Western blot techniques, using commercially available monoclonal antibodies, were used to detect presence of phosphothreonine and phosphoserine substituents, but two different monoclonal antibodies did not detect phosphotyrosine. Moreover, treatment with two different alkaline phosphotases converted the molecule, as assessed by SDS-PAGE and detection by silver stain, from the parent form of about 25 kDa to forms of approximately 19 kDa (similar to that assigned by mass spectrometry) and/or 15 kDa. Original antiserum generated toward, and reacting with native anti-agglutinin, reacted only with 19 kDa form. These results are consistent with the conclusion that the native anti-agglutinin may be a novel protein that is phosphorylated at serine and/or threonine residues.
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Affiliation(s)
- H Harayama
- Graduate School of Science and Technology, Kobe University, Kobe, Japan.
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37
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Voitenleitner C, Rehfuess C, Hilmes M, O'Rear L, Liao PC, Gage DA, Ott R, Nasheuer HP, Fanning E. Cell cycle-dependent regulation of human DNA polymerase alpha-primase activity by phosphorylation. Mol Cell Biol 1999; 19:646-56. [PMID: 9858588 PMCID: PMC83922 DOI: 10.1128/mcb.19.1.646] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [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] [Received: 05/26/1998] [Accepted: 09/29/1998] [Indexed: 11/20/2022] Open
Abstract
DNA polymerase alpha-primase is known to be phosphorylated in human and yeast cells in a cell cycle-dependent manner on the p180 and p68 subunits. Here we show that phosphorylation of purified human DNA polymerase alpha-primase by purified cyclin A/cdk2 in vitro reduced its ability to initiate simian virus 40 (SV40) DNA replication in vitro, while phosphorylation by cyclin E/cdk2 stimulated its initiation activity. Tryptic phosphopeptide mapping revealed a family of p68 peptides that was modified well by cyclin A/cdk2 and poorly by cyclin E/cdk2. The p180 phosphopeptides were identical with both kinases. By mass spectrometry, the p68 peptide family was identified as residues 141 to 160. Cyclin A/cdk2- and cyclin A/cdc2-modified p68 also displayed a phosphorylation-dependent shift to slower electrophoretic mobility. Mutation of the four putative phosphorylation sites within p68 peptide residues 141 to 160 prevented its phosphorylation by cyclin A/cdk2 and the inhibition of replication activity. Phosphopeptide maps of the p68 subunit of DNA polymerase alpha-primase from human cells, synchronized and labeled in G1/S and in G2, revealed a cyclin E/cdk2-like pattern in G1/S and a cyclin A/cdk2-like pattern in G2. The slower-electrophoretic-mobility form of p68 was absent in human cells in G1/S and appeared as the cells entered G2/M. Consistent with this, the ability of DNA polymerase alpha-primase isolated from synchronized human cells to initiate SV40 replication was maximal in G1/S, decreased as the cells completed S phase, and reached a minimum in G2/M. These results suggest that the replication activity of DNA polymerase alpha-primase in human cells is regulated by phosphorylation in a cell cycle-dependent manner.
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Affiliation(s)
- C Voitenleitner
- Department of Molecular Biology, Vanderbilt University, Nashville, Tennessee 37235, and Vanderbilt Cancer Center, Nashville, Tennessee 37232-6838, USA
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38
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Rathinasabapathi B, Burnet M, Russell BL, Gage DA, Liao PC, Nye GJ, Scott P, Golbeck JH, Hanson AD. Choline monooxygenase, an unusual iron-sulfur enzyme catalyzing the first step of glycine betaine synthesis in plants: prosthetic group characterization and cDNA cloning. Proc Natl Acad Sci U S A 1997; 94:3454-8. [PMID: 9096415 PMCID: PMC20391 DOI: 10.1073/pnas.94.7.3454] [Citation(s) in RCA: 196] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Plants synthesize the osmoprotectant glycine betaine via the route choline --> betaine aldehyde --> glycine betaine. In spinach, the first step is catalyzed by choline monooxygenase (CMO), a ferredoxin-dependent stromal enzyme that has been hypothesized to be an oligomer of identical subunits and to be an Fe-S protein. Analysis by HPLC and matrix-assisted laser desorption ionization MS confirmed that native CMO contains only one type of subunit (Mr 42,864). Determination of acid-labile sulfur and nonheme iron demonstrated that there is one [2Fe-2S] cluster per subunit, and EPR spectral data indicated that this cluster is of the Rieske type--i.e., coordinated by two Cys and two His ligands. A full-length CMO cDNA (1,622 bp) was cloned from spinach using a probe generated by PCR amplification for which the primers were based on internal peptide sequences. The ORF encoded a 440-amino acid polypeptide that included a 60-residue transit peptide. The deduced amino acid sequence included two Cys-His pairs spaced 16 residues apart, a motif characteristic of Rieske-type Fe-S proteins. Larger regions that included this motif also showed some sequence similarity (approximately 40%) to Rieske-type proteins, particularly bacterial oxygenases. Otherwise there was very little similarity between CMO and proteins from plants or other organisms. RNA and immunoblot analyses showed that the expression of CMO in leaves increased several-fold during salinization. We conclude that CMO is a stress-inducible representative of a new class of plant oxygenases.
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Affiliation(s)
- B Rathinasabapathi
- Horticultural Sciences Department, University of Florida, Gainesville 32611, USA
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39
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Huber SC, Huber JL, Liao PC, Gage DA, McMichael RW, Chourey PS, Hannah LC, Koch K. Phosphorylation of serine-15 of maize leaf sucrose synthase. Occurrence in vivo and possible regulatory significance. Plant Physiol 1996; 112:793-802. [PMID: 8883390 PMCID: PMC158004 DOI: 10.1104/pp.112.2.793] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Experiments were conducted to determine whether sucrose synthase (SuSy) was phosphorylated in the elongation zone of maize (Zea mays L.) leaves. The approximately 90-kD subunit of SuSy was 32P-labeled on seryl residue(s) when excised shoots were fed [32P]orthophosphate. Both isoforms of SuSy (the SS1 and SS2 proteins) were phosphorylated in vivo, and tryptic peptide-mapping analysis suggested a single, similar phosphorylation site in both proteins. A combination of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and automated Edman sequencing analysis unequivocally identified the phosphorylation site in the maize SS2 protein as serine-15. This site was phosphorylated in vitro by endogenous protein kinase(s) in a strictly Ca(2+)-dependent manner. A synthetic peptide, based on the phosphorylation site sequence, was used to identify and partially purify an endogenous Ca(2+)-dependent protein kinase(s) from the maize leaf elongation zone and expanding spinach leaves. Phosphorylation of SuSy in vitro selectively activates the cleavage reaction by increasing the apparent affinity of the enzyme for sucrose and UDP, suggesting that phosphorylation may be of regulatory significance. Conservation of the phosphorylation site, and the sequences surrounding it, among plant species suggests that phosphorylation of SuSy may be widespread, if not universal, in plants.
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Affiliation(s)
- S C Huber
- United States Department of Agriculture, Agricultural Research Service, North Carolina State University, Raleigh 27695-7609, USA
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40
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Bachmann M, Huber JL, Liao PC, Gage DA, Huber SC. The inhibitor protein of phosphorylated nitrate reductase from spinach (Spinacia oleracea) leaves is a 14-3-3 protein. FEBS Lett 1996; 387:127-31. [PMID: 8674533 DOI: 10.1016/0014-5793(96)00478-4] [Citation(s) in RCA: 138] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The inhibitor protein (IP) that inactivates spinach leaf NADH:nitrate reductase (NR) has been identified for the first time as a member of the eukaryotic 14-3-3 protein family based on three lines of evidence. First, the sequence of an eight amino acid tryptic peptide, obtained from immunopurified IP, matched that of a highly conserved region of the 14-3-3 proteins. Second, an authentic member of the 14-3-3 family, recombinant Arabidopsis GF14omega, caused inactivation of phospho-NR in a magnesium-dependent manner identical to IP. Third, an anti-GF14 monoclonal antibody cross-reacted with IP and anti-IP monoclonal antibodies cross-reacted with GF14omega.
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Affiliation(s)
- M Bachmann
- U.S. Department of Agriculture, Agriculture Research Service, Raleigh, NC 27695-7631, USA
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41
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Liao PC, Leykam J, Andrews PC, Gage DA, Allison J. An approach to locate phosphorylation sites in a phosphoprotein: mass mapping by combining specific enzymatic degradation with matrix-assisted laser desorption/ionization mass spectrometry. Anal Biochem 1994; 219:9-20. [PMID: 8059960 DOI: 10.1006/abio.1994.1224] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.0] [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: 01/28/2023]
Abstract
A rapid, picomole-scale method is described to locate phosphorylation sites in phosphoproteins by using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) combined with enzymatic modification of the analyte. There are three steps to locate phosphorylation sites in a phosphoprotein: (i) degradation of the phosphoprotein into small peptides by specific enzymatic or chemical reactions; (ii) identification of the phosphopeptides by -80 (or multiples of -80)-Da mass shifts in the mass spectra after dephosphorylation with alkaline phosphatase; (iii) location of the phosphorylation sites by mass mapping. As the size of the protein increases, it is advantageous to fractionate the mixture by HPLC and analyze each fraction by MALDI-TOF-MS. To perform mass mapping, the primary structure of the protein must be known. Bovine beta-casein was analyzed by this method. The conclusions about the specific phosphorylation sites of bovine beta-casein from our data coincide with previously reported results. From calculations, it is found that a mass spectrometer with 0.1% mass accuracy is sufficient, for mass mapping, to identify completely or partially digested tryptic peptides in the mass range of 100-8000 Da from bovine beta-casein (MW 23,983).
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Affiliation(s)
- P C Liao
- Department of Chemistry, Michigan State University, East Lansing 48824
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42
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Wang YK, Liao PC, Allison J, Gage DA, Andrews PC, Lubman DM, Hanash SM, Strahler JR. Phorbol 12-myristate 13-acetate-induced phosphorylation of Op18 in Jurkat T cells. Identification of phosphorylation sites by matrix-assisted laser desorption ionization mass spectrometry. J Biol Chem 1993; 268:14269-77. [PMID: 8314790] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Op18 is a widely expressed, cell cycle-regulated, phosphoprotein involved in signal transduction of a variety of stimuli. In actively proliferating Jurkat T cells which express Op18 at high level, phorbol 12-myristate 13-acetate (PMA) treatment induces a rapid increase in the level of several Op18 phosphorylated forms. To determine phosphorylation sites involved in the PMA effect, the major Op18 phosphorylated forms were resolved in Jurkat T cells, before and after treatment with PMA, using preparative immobilized pH gradient-based two-dimensional polyacrylamide gel electrophoresis. Tryptic fragments of phosphorylated Op18 were analyzed by two-dimensional thin layer peptide mapping and were resolved by reverse-phase high performance liquid chromatography prior to analysis by matrix-assisted laser desorption ionization mass spectrometry. Phosphorylation sites were identified by further treatment of the proteolytic fragments with different enzymes and determination of the mass shifts by matrix-assisted laser desorption ionization mass spectrometry. Two major phosphorylation sites were identified. Low constitutive levels of phosphorylation at Ser25 and Ser38 in Op18a and Op18b was demonstrated. Treatment with PMA resulted in enhanced phosphorylation of Ser25 in Op18a and of both Ser25 and Ser38 in Op18b. Taken together with prior studies of Op18 phosphorylation, the data suggest that Op18 phosphorylation occurs at identical sites in different tissues and organisms.
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Affiliation(s)
- Y K Wang
- Department of Pediatrics, University of Michigan, School of Medicine, Ann Arbor 48109-0510
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