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Hong CW, Tsai HY, Chung CH, Wang JC, Hsu YJ, Lin CY, Hsu CW, Chien WC, Tsai SH. The associations among peptic ulcer disease, Helicobacter pylori infection, and abdominal aortic aneurysms: A nationwide population-based cohort study. J Cardiol 2024:S0914-5087(24)00027-3. [PMID: 38382580 DOI: 10.1016/j.jjcc.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 01/11/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
BACKGROUND There are overlapping risk factors and underlying molecular mechanisms for both peptic ulcer disease (PUD) and abdominal aortic aneurysm (AAA). Despite improvements in the early diagnosis and treatment of AAA, ruptured AAAs continue to cause a substantial number of deaths. Helicobacter pylori are Gram-negative, microaerophilic bacteria that are now recognized as the main cause of PUD. H. pylori infection (HPI) is associated with an increased risk of certain cardiovascular diseases. HPIs can be treated with at least two different antibiotics to prevent bacteria from developing resistance to one particular antibiotic. METHODS We conducted a population-based cohort study using the National Health Insurance Research Database to evaluate whether associations exist among PUD, HPI, and eradication therapy for HPI and AAA. The primary outcome of this study was the cumulative incidence of AAA among patients with or without PUD and HPI during the 14-year follow-up period. RESULTS Our analysis included 7003 patients with PUD/HPI, 7003 patients with only PUD, and another 7003 age-, sex-, and comorbidity-matched controls from the database. We found that patients with PUD/HPI had a significantly increased risk of AAA compared to those with PUD alone and matched controls. The patients who had PUD/HPI had a significantly higher cumulative risk of developing AAA than those with PUD and the comparison group (2.67 % vs. 1.41 % vs. 0.73 %, respectively, p < 0.001). Among those patients with PUD/HPI, patients who had eradication therapy had a lower incidence of AAA than those without eradication therapy (2.46 % vs. 3.88 %, p = 0.012). CONCLUSIONS We revealed an association among PUD, HPI, and AAA, even after adjusting for age, sex, comorbidities, and annual medical follow-up visits. Notably, we found that HPI eradication therapy reduced the incidence of AAA among patients with PUD.
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Affiliation(s)
- Chia-Wei Hong
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Hsiao-Ya Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chi-Hsiang Chung
- Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; School of Public Health, National Defense Medical Center, Taipei, Taiwan; Taiwanese Injury Prevention and Safety Promotion Association, Taipei, Taiwan
| | - Jen-Chun Wang
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Juei Hsu
- Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chih-Yuan Lin
- Department of Surgery, Division of Cardiovascular Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chin-Wang Hsu
- Department of Emergency Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Emergency and Critical Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Wu-Chien Chien
- Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; School of Public Health, National Defense Medical Center, Taipei, Taiwan; Taiwanese Injury Prevention and Safety Promotion Association, Taipei, Taiwan.
| | - Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan; Taichung Armed Forces General Hospital, Taichung, Taiwan.
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2
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Wang JC, Tsai SH, Tsai HY, Lin SJ, Huang PH. Hyperuricemia exacerbates abdominal aortic aneurysm formation through the URAT1/ERK/MMP-9 signaling pathway. BMC Cardiovasc Disord 2023; 23:55. [PMID: 36710339 PMCID: PMC9885634 DOI: 10.1186/s12872-022-03012-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 12/14/2022] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE Previous studies have revealed associations between hyperuricemia and microvascular diseases, but the association between hyperuricemia and abdominal aortic aneurysm (AAA) remains unclear. The aim of this study was to elucidate the pathogenesis and prove the relationship between AAA and hyperuricemia. METHODS A retrospective study was performed to validate the growth rates of AAA in humans with different serum uric acid levels. A murine model of angiotensin II-induced AAA was used to assess the effects of hyperuricemia on AAA growth in vivo, and human aortic smooth muscle cells (HASMCs) were used to study the pathways involved in these effects in vitro. RESULTS We analyzed data from 107 AAA patients and found that patients with serum uric acid levels above 9 mg/dl had higher AAA growth rates than patients with serum uric acid levels between 4 and 7.9 mg/dl. In vivo, induction of hyperuricemia increased the incidence of AAA formation and the abdominal aortic diameter in mice. The hyperuricemic mice exhibited higher levels of urate transporter 1 (URAT1) expression, phospho-extracellular signal-regulated kinase (p-ERK)1/2 expression, reactive oxygen species (ROS) levels and matrix metalloproteinase (MMP)-9 expression in the abdominal aorta than the control mice. Soluble uric acid increased the expression of URAT1, p-ERK1/2, and MMP-9 and the levels of ROS in HASMCs in vitro. CONCLUSIONS We have provided human evidence that hyperuricemia exacerbates AAA formation. In addition, our murine experimental evidence suggests that hyperuricemia exacerbates AAA formation and reveals that the URAT1/ERK1/2/ROS/MMP-9 pathway is among the pathways activated by uric acid in HASMCs.
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Affiliation(s)
- Jen-Chun Wang
- grid.260565.20000 0004 0634 0356Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Road, Neihu Dist., Taipei City, 114 Taiwan ,grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang-Ming University, Taipei, 112 Taiwan ,grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, 112 Taiwan
| | - Shih-Hung Tsai
- grid.260565.20000 0004 0634 0356Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Road, Neihu Dist., Taipei City, 114 Taiwan
| | - Hsiao-Ya Tsai
- grid.260565.20000 0004 0634 0356Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Road, Neihu Dist., Taipei City, 114 Taiwan
| | - Shing-Jong Lin
- grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang-Ming University, Taipei, 112 Taiwan ,grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, 112 Taiwan ,grid.278247.c0000 0004 0604 5314Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road., Taipei, Taiwan ,grid.260539.b0000 0001 2059 7017Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan ,grid.278247.c0000 0004 0604 5314Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Po-Hsun Huang
- grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang-Ming University, Taipei, 112 Taiwan ,grid.260539.b0000 0001 2059 7017Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, 112 Taiwan ,grid.278247.c0000 0004 0604 5314Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road., Taipei, Taiwan ,grid.260539.b0000 0001 2059 7017Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan ,grid.278247.c0000 0004 0604 5314Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
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Kuo CS, Chen CY, Huang HL, Tsai HY, Chou RH, Wei JH, Huang PH, Lin SJ. Melatonin Improves Ischemia-Induced Circulation Recovery Impairment in Mice with Streptozotocin-Induced Diabetes by Improving the Endothelial Progenitor Cells Functioning. Int J Mol Sci 2022; 23:ijms23179839. [PMID: 36077238 PMCID: PMC9456213 DOI: 10.3390/ijms23179839] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Patients with diabetes mellitus tend to develop ischemia-related complications and have compromised endothelial progenitor cell (EPC) function. Melatonin protects against ischemic injury, possibly via EPC modulation. We investigated whether melatonin pretreatment could restore EPC function impairment and improve circulation recovery in a diabetic critical limb ischemia mouse model. Under 25 mM high-glucose medium in vitro, EPC proliferation, nitric oxide production, tube formation, and endothelial nitric oxide synthase (eNOS) phosphorylation were significantly suppressed. Hyperglycemia promoted EPC senescence and apoptosis as well as increased reactive oxygen species (ROS) production. Melatonin treatment reversed the harmful effects of hyperglycemia on EPC through adenosine monophosphate–activated protein kinase-related mechanisms to increase eNOS phosphorylation and heme oxygenase-1 expression. In an in-vivo study, after a 4-week surgical induction of hindlimb ischemia, mice with streptozotocin (STZ)-induced diabetes showed significant reductions in new vessel formation, tissue reperfusion, and EPC mobilization in ischemic hindlimbs compared to non-diabetic mice. Mice with STZ-induced diabetes that received melatonin treatment (10 mg/kg/day, intraperitoneal) had significantly improved blood perfusion ratios of ischemic to non-ischemic limb, EPC mobilization, and densities of capillaries. In addition, a murine bone marrow transplantation model to support these findings demonstrated that melatonin stimulated bone marrow-originated EPCs to differentiate into vascular endothelial cells in femoral ligation-induced ischemic muscles. In summary, this study suggests that melatonin treatment augments EPC function along with neovascularization in response to ischemia in diabetic mice. We illustrated the protective effects of melatonin on EPC H2O2 production, senescence, and migration through melatonin receptors and modulating eNOS, AMPK, and HO-1 activities at the cellular level. Thus, melatonin might be used to treat the impairment of EPC mobilization and circulation recuperation in response to ischemic injury caused by chronic hyperglycemia. Additional studies are needed to elucidate the applicability of the results in humans.
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Affiliation(s)
- Chin-Sung Kuo
- Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Chi-Yu Chen
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Hsin-Lei Huang
- Department of Nursing, College of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 112303, Taiwan
- Correspondence: (H.-L.H.); (P.-H.H.); Tel.: +886-2-2871-2121 (H.-L.H.); +886-2-2875-7434 (P.-H.H.); Fax: +886-2-2875-7435 (H.-L.H. & P.-H.H.)
| | - Hsiao-Ya Tsai
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Ruey-Hsing Chou
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Cardiovascular Research Center, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Jih-Hua Wei
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Division of Cardiology, Department of Internal Medicine, Min-Sheng General Hospital, Taoyuan 330056, Taiwan
- Department of Nutrition and Health Sciences, School of Healthcare Management, Kai-Nan University, Taoyuan 338103, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Cardiovascular Research Center, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Correspondence: (H.-L.H.); (P.-H.H.); Tel.: +886-2-2871-2121 (H.-L.H.); +886-2-2875-7434 (P.-H.H.); Fax: +886-2-2875-7435 (H.-L.H. & P.-H.H.)
| | - Shing-Jong Lin
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Cardiovascular Research Center, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei 110301, Taiwan
- Division of Cardiology, Heart Center, Cheng-Hsin General Hospital, Taipei 112401, Taiwan
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Tsai HY, Hsu YJ, Lu CY, Tsai MC, Hung WC, Chen PC, Wang JC, Hsu LA, Yeh YH, Chu P, Tsai SH. Pharmacological Activation Of Aldehyde Dehydrogenase 2 Protects Against Heatstroke-Induced Acute Lung Injury by Modulating Oxidative Stress and Endothelial Dysfunction. Front Immunol 2021; 12:740562. [PMID: 34764958 PMCID: PMC8576434 DOI: 10.3389/fimmu.2021.740562] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 07/13/2021] [Accepted: 10/11/2021] [Indexed: 11/13/2022] Open
Abstract
Heatstroke (HS) can cause acute lung injury (ALI). Heat stress induces inflammation and apoptosis via reactive oxygen species (ROS) and endogenous reactive aldehydes. Endothelial dysfunction also plays a crucial role in HS-induced ALI. Aldehyde dehydrogenase 2 (ALDH2) is a mitochondrial enzyme that detoxifies aldehydes such as 4-hydroxy-2-nonenal (4-HNE) protein adducts. A single point mutation in ALDH2 at E487K (ALDH2*2) intrinsically lowers the activity of ALDH2. Alda-1, an ALDH2 activator, attenuates the formation of 4-HNE protein adducts and ROS in several disease models. We hypothesized that ALDH2 can protect against heat stress-induced vascular inflammation and the accumulation of ROS and toxic aldehydes. Homozygous ALDH2*2 knock-in (KI) mice on a C57BL/6J background and C57BL/6J mice were used for the animal experiments. Human umbilical vein endothelial cells (HUVECs) were used for the in vitro experiment. The mice were directly subjected to whole-body heating (WBH, 42°C) for 1 h at 80% relative humidity. Alda-1 (16 mg/kg) was administered intraperitoneally prior to WBH. The severity of ALI was assessed by analyzing the protein levels and cell counts in the bronchoalveolar lavage fluid, the wet/dry ratio and histology. ALDH2*2 KI mice were susceptible to HS-induced ALI in vivo. Silencing ALDH2 induced 4-HNE and ROS accumulation in HUVECs subjected to heat stress. Alda-1 attenuated the heat stress-induced activation of inflammatory pathways, senescence and apoptosis in HUVECs. The lung homogenates of mice pretreated with Alda-1 exhibited significantly elevated ALDH2 activity and decreased ROS accumulation after WBH. Alda-1 significantly decreased the WBH-induced accumulation of 4-HNE and p65 and p38 activation. Here, we demonstrated the crucial roles of ALDH2 in protecting against heat stress-induced ROS production and vascular inflammation and preserving the viability of ECs. The activation of ALDH2 by Alda-1 attenuates WBH-induced ALI in vivo.
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Affiliation(s)
- Hsiao-Ya Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Juei Hsu
- Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Center for the Prevention and Treatment of Heat Stroke, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Cheng-Yo Lu
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Min-Chien Tsai
- Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan
| | - Wan-Chu Hung
- Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan
| | - Po-Chuan Chen
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Jen-Chun Wang
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Lung-An Hsu
- Cardiovascular Department, Chang-Gung Memorial Hospital and School of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Yung-Hsin Yeh
- Cardiovascular Department, Chang-Gung Memorial Hospital and School of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Pauling Chu
- Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Center for the Prevention and Treatment of Heat Stroke, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan
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5
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Tsai SH, Hsu LA, Tsai HY, Yeh YH, Lu CY, Chen PC, Wang JC, Chiu YL, Lin CY, Hsu YJ. Aldehyde dehydrogenase 2 protects against abdominal aortic aneurysm formation by reducing reactive oxygen species, vascular inflammation, and apoptosis of vascular smooth muscle cells. FASEB J 2020; 34:9498-9511. [PMID: 32463165 DOI: 10.1096/fj.201902550rrr] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 10/07/2019] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 12/14/2022]
Abstract
Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is an enzyme that detoxifies aldehydes by converting them to carboxylic acids. ALDH2 deficiency is known to increase oxidative stress. Increased oxidative stress plays a pivotal role in abdominal aortic aneurysm (AAA) pathogenesis. Reactive oxygen species (ROS) promote degradation of the extracellular matrix (ECM) and vascular smooth muscle cell (VSMC) apoptosis. Reducing oxidative stress by an ALDH2 activator could have therapeutic potential for limiting AAA development. We hypothesized that ALDH2 deficiency could increase the risk for AAA by decreasing ROS elimination and that an ALDH2 activator could provide an alternative option for AAA treatment. The National Center for Biotechnology (NCBI) Gene Expression Omnibus (GEO) database was used. Human aortic smooth muscle cells (HASMCs) were used for the in vitro experiments. Gene-targeted ALDH2*2 KI knock-in mice on a C57BL/6J background and apolipoprotein E knockout (ApoE KO) mice were obtained. An animal model of AAA was constructed using osmotic minipumps to deliver 1000 ng/kg/min angiotensin II (AngII) for 28 days. Patients with AAA had significantly lower ALDH2 expression levels than normal subjects. ALDH2*2 KI mice were susceptible to AngII administration, exhibiting significantly increased AAA incidence rates and increased aortic diameters. Alda-1, an ALDH2 activator, reduced AngII-induced ROS production, NF-kB activation, and apoptosis in HASMCs. Alda-1 attenuated AngII-induced aneurysm formation and decreased aortic expansion in ApoE KO mice. We concluded that ALDH2 deficiency is associated with the development of AAAs in humans and a murine disease model. ALDH2 deficiency increases susceptibility to AngII-induced AAA formation by attenuating anti-ROS effects and increasing VSMC apoptosis and vascular inflammation. Alda-1 was shown to attenuate the progression of experimental AAA in a murine model.
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Affiliation(s)
- Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan
| | - Lung-An Hsu
- Cardiovascular Department, Chang-Gung Memorial Hospital and School of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Hsiao-Ya Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yung-Hsin Yeh
- Cardiovascular Department, Chang-Gung Memorial Hospital and School of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Cheng-Yo Lu
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Po-Chuan Chen
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Jen-Chun Wang
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yi-Lin Chiu
- Department of Biochemistry, National Defense Medical Center, Taipei, Taiwan
| | - Chih-Yuan Lin
- Department of Surgery, Division of Cardiovascular surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Juei Hsu
- Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
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Tsai HY, Wu HH, Chou BC, Li CS, Gau BZ, Lin ZY, Fuh CB. A magneto-microfluidic platform for fluorescence immunosensing using quantum dot nanoparticles. Nanotechnology 2019; 30:505101. [PMID: 31557130 DOI: 10.1088/1361-6528/ab423d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study reports the online fluorescent detection of carcinoembryonic antigen (CEA) and α-fetoprotein (AFP) biomarker proteins in microfluidic channels using functional nanoparticles. Functional magnetic nanoparticles labeled with two antibodies were predeposited on separated microfluidic channels. Antigens were passed through each microfluidic channel to react with the respective antibodies. Two types of fluorescent nanoparticles labeled with antibodies were then used to detect and confirm antigens in the immunocomplex. Results indicate that online fluorescent detection of proteins can provide advantages for real-time monitoring and diagnostic applications. The running time was less than 20 min for each trial. The detection limits of CEA and AFP were found to be 0.6 and 0.2 pg ml-1. These detection limits are lower than those of ELISA. The linear ranges of CEA and AFP detection were from 1.8 pg ml-1 to 1.8 ng ml-1 and from 0.68 pg ml-1 to 0.68 ng ml-1 for two deposition zones in a magnetic sandwich immunoassay. The linear ranges of this method are wider than those of ELISA and those of most other methods. The measurements of CEA and AFP in serum samples from this method differed from ELISA results by 11% and 9.4%, respectively. The detection limit of online detection has achieved the same range as those of previous offline detection. This method has a good potential for automation and multichannel analysis to increase the throughput with some modifications in the future. The proposed method can provide simple, fast, and sensitive online detection for biomarkers.
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Affiliation(s)
- H Y Tsai
- School of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan. Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 402, Taiwan
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Chen CY, Tsai HY, Tsai SH, Chu PH, Huang PH, Chen JW, Lin SJ. Deletion of the FHL2 gene attenuates intima-media thickening in a partially ligated carotid artery ligated mouse model. J Cell Mol Med 2019; 24:160-173. [PMID: 31714683 PMCID: PMC6933399 DOI: 10.1111/jcmm.14687] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 02/28/2019] [Revised: 06/03/2019] [Accepted: 06/30/2019] [Indexed: 12/14/2022] Open
Abstract
The four and a half LIM domain protein 2 (FHL2) is a member of the four and a half LIM domain (FHL) gene family, and it is associated with cholesterol‐enriched diet‐promoted atherosclerosis. However, the effect of FHL2 protein on vascular remodelling in response to hemodynamic alterations remains unclear. Here, we investigated the role of FHL2 in a model of restricted blood flow‐induced atherosclerosis. To promote neointimal hyperplasia in vivo, we subjected FHL2+/+ and FHL2−/− mice to partial ligation of the left carotid artery (LCA). The expression of p‐ERK and p‐AKT was decreased in FHL2−/− mice. FHL2 bound to AKT regulated AKT phosphorylation and led to Rac1‐GTP inactivation. FHL2 silencing in human aortic smooth muscle cells down‐regulated the PDGF‐induced phosphorylation of ERK and AKT. Furthermore, FHL2 silencing reduced cytoskeleton conformational changes and caused cell cycle arrest. We concluded that FHL2 is essential for the regulation of arterial smooth muscle cell function. FHL2 modulates proliferation and migration via mitogen‐activated protein kinase (MAPK) and PI3K‐AKT signalling, leading to arterial wall thickening and thus neointimal hyperplasia.
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Affiliation(s)
- Chi-Yu Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Hsiao-Ya Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Pao-Hsien Chu
- First Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Jaw-Wen Chen
- Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan.,Institute and Department of Pharmacology, National Yang-Ming University, Taipei, Taiwan
| | - Shing-Jong Lin
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Healthcare and Management Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
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8
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Tsai SH, Huang PH, Tsai HY, Hsu YJ, Chen YW, Wang JC, Chen YH, Lin SJ. Roles of the hypoximir microRNA-424/322 in acute hypoxia and hypoxia-induced pulmonary vascular leakage. FASEB J 2019; 33:12565-12575. [PMID: 31461385 DOI: 10.1096/fj.201900564rr] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Acute mountain sickness (AMS) occurs in up to 25% of unacclimatized persons who ascend to 3000 m and can result in high-altitude pulmonary edema (HAPE). MicroRNAs (miRs) can regulate gene expression at the post-transcriptional level. Hypoxia selectively disrupts endothelial tight junction complexes through a hypoxia-inducible factor-1α (HIF-1α)-dependent mechanism. Though increased HIF-1α expression is associated with adaptation and protection from AMS development in the early stage of hypoxia, a downstream effector of HIF-1α, VEGF, can induce overzealous endothelial barrier dysfunction, increase vascular permeability, and ultimately result in HAPE and high-altitude cerebral edema. We hypothesized that the fine-tuning of downstream effectors by miRs is paramount for the preservation of endothelial barrier integrity and the prevention of vascular leakage. We found that several miRs were up-regulated in healthy volunteers who were subjected to a 3100-m height. By reviewing the literature and using online bioinformatics prediction software, we specifically selected miR-424 for further investigation because it can modulate both HIF-1α and VEGF. Hypoxia-induced miR-424 overexpression is HIF-1α dependent, and miR-424 stabilized HIF-1α, decreased VEGF expression, and promoted vascular endothelial cadherin phosphorylation. In addition, hypoxia resulted in endothelial barrier dysfunction with increased permeability; miR-424 thus attenuated hypoxia-induced endothelial cell senescence and apoptosis. miR-322 knockout mice were susceptible to hypoxia-induced pulmonary vascular leakage. miR-322 mimics improved hypoxia-induced pulmonary vascular leakage in vivo. We conclude that several miRs were up-regulated in healthy adult volunteers subjected to hypobaric hypoxemia. miR-424/322 could modulate the HIF-1α-VEGF axis and prevent hypoxia-induced pulmonary vascular leakage under hypoxic conditions.-Tsai, S.-H., Huang, P.-H., Tsai, H.-Y., Hsu, Y.-J., Chen, Y.-W., Wang, J.-C., Chen, Y.-H., Lin, S.-J. Roles of the hypoximir microRNA-424/322 in acute hypoxia and hypoxia-induced pulmonary vascular leakage.
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Affiliation(s)
- Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hsiao-Ya Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Juei Hsu
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yen-Wen Chen
- Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jen-Chun Wang
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Ying-Hsin Chen
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Shing-Jong Lin
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Healthcare and Services Center, Taipei Veterans General Hospital, Taipei, Taiwan.,Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
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9
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Chen IC, Kuo CS, Wu CC, Tsai HY, Lin CP, Li SY, Chou RH, Huang PH, Chen JW, Lin SJ. Chronic hyperuricemia impairs blood flow recovery in the ischemic hindlimb through suppression of endothelial progenitor cells. Oncotarget 2018; 9:9285-9298. [PMID: 29507690 PMCID: PMC5823617 DOI: 10.18632/oncotarget.24290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 08/14/2017] [Accepted: 01/02/2018] [Indexed: 11/25/2022] Open
Abstract
Objective Chronic hyperuricemia is associated with cardiovascular disease, but its impact on endothelial progenitor cells (EPC) and ischemia-induced neovascularization remains unclear. Herein we investigated whether chronic hyperuricemia could impede blood flow recovery in response to tissue ischemia by suppression of EPC. Methods Human EPC were isolated and cultured in a high-level uric acid medium for functional testing. Cell proliferation, nitric oxide (NO) production and apoptosis assay were examined. A chronic hyperuricemia mouse model was established by potassium oxonate treatment and/or a high-level uric acid diet to evaluate the actions of chronic hyperuricemia on ischemia-induced blood flow recovery. After 4 weeks of drug treatment, hindlimb ischemia surgery was performed in the control and hyperuricemia mice. Blood flow recovery was followed up every week before and after ischemic surgery using a laser Doppler Perfusion Imager System. The circulating EPC number in the peripheral blood was determined by flow cytometry (Sca-1+/Flk-1+). Results Incubation with a high-level uric acid medium (10 mg/dL) significantly suppressed EPC proliferation, reduced NO production, and lessened phosphorylation of Akt and eNOS. Moreover, EPC treated with high-level uric acid increased reactive oxygen species production, promoted cellular apoptosis and senescence, and also inhibited EPC tube formation. Four weeks after hindlimb ischemia surgery, the chronic hyperuricemia mice had significantly reduced tissue reperfusion, EPC mobilization, and impaired neovascularization in the ischemic hindlimbs compared with the control mice. Conclusions Chronic hyperuricemia impaired blood flow recovery and EPC mobilization in response to tissue ischemia, and these effects could have occurred through suppression of EPC.
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Affiliation(s)
- I-Chun Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chin-Sung Kuo
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chih-Cheng Wu
- Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,National Tsing-Hua University, Institute of Biomedical Engineering, Hsinchu, Taiwan.,National Taiwan University Hospital, College of Medicine, Taipei, Taiwan.,Cardiovascular Center, National Taiwan University Hospital, Hsinchu Branch, Hsinchu, Taiwan
| | - Hsiao-Ya Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Pei Lin
- Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Biotechnology and Laboratory Science in Medicine and Institute of Biotechnology in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Szu-Yuan Li
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Nephrology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ruey-Hsing Chou
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jaw-Wen Chen
- Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan.,Institute and Department of Pharmacology, National Yang-Ming University, Taipei, Taiwan
| | - Shing-Jong Lin
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan.,Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan.,Taipei Medical University, Taipei, Taiwan
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10
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Tsai HY, Lin CP, Huang PH, Li SY, Chen JS, Lin FY, Chen JW, Lin SJ. Coenzyme Q10 Attenuates High Glucose-Induced Endothelial Progenitor Cell Dysfunction through AMP-Activated Protein Kinase Pathways. J Diabetes Res 2016; 2016:6384759. [PMID: 26682233 PMCID: PMC4670652 DOI: 10.1155/2016/6384759] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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] [Received: 04/05/2015] [Accepted: 05/10/2015] [Indexed: 11/22/2022] Open
Abstract
Coenzyme Q10 (CoQ10), an antiapoptosis enzyme, is stored in the mitochondria of cells. We investigated whether CoQ10 can attenuate high glucose-induced endothelial progenitor cell (EPC) apoptosis and clarified its mechanism. EPCs were incubated with normal glucose (5 mM) or high glucose (25 mM) environment for 3 days, followed by treatment with CoQ10 (10 μM) for 24 hr. Cell proliferation, nitric oxide (NO) production, and JC-1 assay were examined. The specific signal pathways of AMP-activated protein kinase (AMPK), eNOS/Akt, and heme oxygenase-1 (HO-1) were also assessed. High glucose reduced EPC functional activities, including proliferation and migration. Additionally, Akt/eNOS activity and NO production were downregulated in high glucose-stimulated EPCs. Administration of CoQ10 ameliorated high glucose-induced EPC apoptosis, including downregulation of caspase 3, upregulation of Bcl-2, and increase in mitochondrial membrane potential. Furthermore, treatment with CoQ10 reduced reactive oxygen species, enhanced eNOS/Akt activity, and increased HO-1 expression in high glucose-treated EPCs. These effects were negated by administration of AMPK inhibitor. Transplantation of CoQ10-treated EPCs under high glucose conditions into ischemic hindlimbs improved blood flow recovery. CoQ10 reduced high glucose-induced EPC apoptosis and dysfunction through upregulation of eNOS, HO-1 through the AMPK pathway. Our findings provide a potential treatment strategy targeting dysfunctional EPC in diabetic patients.
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Affiliation(s)
- Hsiao-Ya Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Pei Lin
- Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- Department of Biotechnology and Laboratory Science in Medicine and Institute of Biotechnology in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
- Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan
- Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan
- *Po-Hsun Huang: and
| | - Szu-Yuan Li
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
- Division of Nephrology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jia-Shiong Chen
- Institute and Department of Pharmacology, National Yang-Ming University, Taipei, Taiwan
| | - Feng-Yen Lin
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jaw-Wen Chen
- Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan
- Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan
- Institute and Department of Pharmacology, National Yang-Ming University, Taipei, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shing-Jong Lin
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
- Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan
- Cardiovascular Research Center, National Yang-Ming University, Taipei, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
- *Shing-Jong Lin:
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11
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Tsai HY, Hamilton A, Guy DR, Houston RD. Single nucleotide polymorphisms in the insulin-like growth factor 1 (IGF1) gene are associated with growth-related traits in farmed Atlantic salmon. Anim Genet 2014; 45:709-15. [PMID: 25090910 PMCID: PMC4171758 DOI: 10.1111/age.12202] [Citation(s) in RCA: 26] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2014] [Indexed: 11/28/2022]
Abstract
Understanding the genetic basis of variation in traits related to growth and fillet quality in Atlantic salmon is of importance to the aquaculture industry. Several growth-related QTL have been identified via the application of genetic markers. The IGF1 gene is considered a highly conserved and crucial growth-regulating gene in salmonid species. However, the association between polymorphisms in the IGF1 gene and growth-related traits in Atlantic salmon is unknown. Therefore, in this study, regions of the Atlantic salmon IGF1 gene were sequenced, aligned and compared across individuals. Three SNPs were identified in the putative promoter (SNP1, g.5763G>T; GenBank no. AGKD01012745), intron 1 (SNP2, g.7292C>T; GenBank no. AGKD01012745) and intron 3 (SNP3, g.4671A>C; GenBank no. AGKD01133398) regions respectively. These SNPs were genotyped in a population of 4800 commercial Atlantic salmon with data on several weight and fillet traits measured at harvest (at approximately 3 years of age). In a mixed model, association analysis of individual SNPs, SNP1 and SNP3 were both significantly associated with several weight traits (P < 0.05). The estimated additive effect on overall harvest weight was approximately 35 and 110 g for SNPs 1 and 3 respectively. A haplotype analysis confirmed the association between genetic variation in the IGF1 gene with overall body weight (P < 0.05) and fillet component traits (P < 0.05). Our findings suggest the identified nucleotide polymorphisms of the IGF1 gene may either affect farmed Atlantic salmon growth directly or be in population-wide linkage disequilibrium with causal variation, highlighting their possible utility as candidates for marker-assisted selection in the aquaculture industry.
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Affiliation(s)
- H Y Tsai
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, EH25 9PS, UK
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12
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Tsai SH, Huang PH, Peng YJ, Chang WC, Tsai HY, Leu HB, Chen JW, Lin SJ. Zoledronate attenuates angiotensin II-induced abdominal aortic aneurysm through inactivation of Rho/ROCK-dependent JNK and NF-κB pathway. Cardiovasc Res 2014; 100:501-10. [PMID: 24225494 DOI: 10.1093/cvr/cvt230] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [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: 01/25/2023] Open
Abstract
AIMS Abdominal aortic aneurysm (AAA) is a life-threatening disease affecting almost 10% of the population over the age of 65. Nitrogen-containing bisphosphonates (N-BPs) have been shown to exert anti-atherogenic and anti-angiogenic effects, but the potential effects of N-BPs on AAA remain unclear. Here, we tested whether a potent N-BP, zoledronate, can attenuate the formation of Angiotensin II (Ang II)-induced AAA in hyperlipidaemic mice. METHODS AND RESULTS Low-density lipoprotein receptor(-/-) (LDLR(-/-)) mice infused for 28 days with Ang II were treated with placebo and 100 μg/kg/day zoledronate. Continuous Ang II infusion in LDLR(-/-) mice exhibited a 59% incidence of AAA formation, and treatment with zoledronate decreased AAA formation (21%). Compared with the saline group, administration of zoledronate in Ang II-infused LDLR(-/-) mice attenuated the expansion of the suprarenal aorta (maximal aortic diameter), reduced elastin degradation in the media layer of the aorta, and significantly diminished vascular inflammation by reduction in vascular cell adhesion molecule expression and macrophage accumulation. Treatment with zoledronate decreased matrix metalloproteinase-2 (MMP-2) in aortic tissues. Zoledronate-treated mice had significant down-regulation of JNK, NF-κB, and reduced Ang II-induced Rho/ROCK activation. Zoledronate reduced monocytes adherence to human aortic endothelial cells in vitro. CONCLUSION Zoledronate-attenuated Ang II induced AAA formation by suppression of MMP-2 activity and suppressed vascular inflammation and Ang II-induced Rho/ROCK activities.
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Affiliation(s)
- Shih-Hung Tsai
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
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13
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Huang HY, Kuo LY, Cheng FH, Chen JC, Hsu CL, Chen BY, Lin YS, Tsai HY, Wei J. Prognostic value of oxygen consumption and ventilatory equivalent slope in female candidates referred for heart transplantation--experience of a single Asian center. Transplant Proc 2014; 46:897-9. [PMID: 24767375 DOI: 10.1016/j.transproceed.2013.09.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 09/26/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ventilatory equivalent (ventilation/CO2 production, VE/VCO2) slope has been suggested to be a much more accurate predicator than peak oxygen consumption (VO2) during exercise for prognosis in patients with heart failure. However, patients tested were predominately male. METHODS To investigate whether peak VO2 and VE/VCO2 slope predict the prognosis of female patients with heart failure, we retrospectively collected data of 39 female candidates referred for heart transplantation (HTx) from 2004 to 2011. Both peak VO2 and VE/VCO2 slope were obtained from the results of an exercise pulmonary function test. The outcome was death or mechanical devices implantation or HTx. Logistic regression was used for data analysis. RESULTS Mean age and heart failure survival score were 55.8 ± 13.7 years and 7.3 ± 0.7, respectively. Each increment of VE/VCO2 slope decreased 2-year event-free rate (odds ratio [OR] = 0.88, 95% confidence interval [CI] = 0.79 to 0.98) in the female group. The predictions of VE/VCO2 slope for 1-year event-free survival did not reach statistical significance (OR = 0.92, 95% CI = 0.84 to 1.00). On the other hand, peak VO2 was not a strong predictor for 1- and 2-year event-free survival (OR = 1.22 and 1.16, 95% CI = 0.96 to 1.55 and 0.94 to 1.44, respectively). CONCLUSIONS Impairment in exercise ventilation holds a clinical and long-term prognostic impact in female patients with heart failure. The role of peak VO2 during exercise in prognostic prediction among the cohort should be further investigated.
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Affiliation(s)
- H Y Huang
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - L Y Kuo
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - F H Cheng
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - J C Chen
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - C L Hsu
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - B Y Chen
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - Y S Lin
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - H Y Tsai
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan
| | - J Wei
- Heart Center, Cheng Hsin General Hospital, Pei-Tou, Taipei, Taiwan.
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14
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Lin YW, Huang CY, Chen YH, Shih CM, Tsao NW, Lin CY, Chang NC, Tsai CS, Tsai HY, Tsai JC, Huang PH, Li CY, Lin FY. GroEL1, a heat shock protein 60 of Chlamydia pneumoniae, impairs neovascularization by decreasing endothelial progenitor cell function. PLoS One 2013; 8:e84731. [PMID: 24376840 PMCID: PMC3871664 DOI: 10.1371/journal.pone.0084731] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 11/19/2013] [Indexed: 01/04/2023] Open
Abstract
The number and function of endothelial progenitor cells (EPCs) are sensitive to hyperglycemia, hypertension, and smoking in humans, which are also associated with the development of atherosclerosis. GroEL1 from Chlamydia pneumoniae has been found in atherosclerotic lesions and is related to atherosclerotic pathogenesis. However, the actual effects of GroEL1 on EPC function are unclear. In this study, we investigate the EPC function in GroEL1-administered hind limb-ischemic C57BL/B6 and C57BL/10ScNJ (a toll-like receptor 4 (TLR4) mutation) mice and human EPCs. In mice, laser Doppler imaging, flow cytometry, and immunohistochemistry were used to evaluate the degree of neo-vasculogenesis, circulating level of EPCs, and expression of CD34, vWF, and endothelial nitric oxide synthase (eNOS) in vessels. Blood flow in the ischemic limb was significantly impaired in C57BL/B6 but not C57BL/10ScNJ mice treated with GroEL1. Circulating EPCs were also decreased after GroEL1 administration in C57BL/B6 mice. Additionally, GroEL1 inhibited the expression of CD34 and eNOS in C57BL/B6 ischemic muscle. In vitro, GroEL1 impaired the capacity of differentiation, mobilization, tube formation, and migration of EPCs. GroEL1 increased senescence, which was mediated by caspases, p38 MAPK, and ERK1/2 signaling in EPCs. Furthermore, GroEL1 decreased integrin and E-selectin expression and induced inflammatory responses in EPCs. In conclusion, these findings suggest that TLR4 and impaired NO-related mechanisms could contribute to the reduced number and functional activity of EPCs in the presence of GroEL1 from C. pneumoniae.
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Affiliation(s)
- Yi-Wen Lin
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chun-Yao Huang
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yung-Hsiang Chen
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
| | - Chun-Ming Shih
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Nai-Wen Tsao
- Division of Cardiovascular Surgery, Taipei Medical University Hospital, Taipei, Taiwan
| | - Cheng-Yen Lin
- Department of Computer Science and Information Management, Hung Kuang University, Taichung, Taiwan
| | - Nen-Chung Chang
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chien-Sung Tsai
- Division of Cardiovascular Surgery, National Defense Medical Center, Taipei, Taiwan
| | - Hsiao-Ya Tsai
- Division of Cardiovascular Surgery, National Defense Medical Center, Taipei, Taiwan
| | - Jui-Chi Tsai
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Po-Hsun Huang
- Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chi-Yuan Li
- Graduate Institute of Clinical Medical Sciences, China Medical University, Taichung, Taiwan
- Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
| | - Feng-Yen Lin
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
- * E-mail:
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15
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Hwang YS, Tsai HY, Chen HY, Wei HW, Lin JH, Liu HL. SU-E-I-59: Patient-Based Average Glandular Dose Estimations in Taiwan. Med Phys 2013. [DOI: 10.1118/1.4814169] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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16
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Huang PH, Chen CY, Lin CP, Wang CH, Tsai HY, Lo WY, Leu HB, Chen JW, Lin SJ, Chu PH. Deletion of FHL2 Gene Impaired Ischemia-Induced Blood Flow Recovery by Modulating Circulating Proangiogenic Cells. Arterioscler Thromb Vasc Biol 2013; 33:709-17. [DOI: 10.1161/atvbaha.112.300318] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Objective—
The four and a half Lin11, Isl-1 and Mec-3 (LIM) domain protein 2 (FHL2) is a member of the four and a half LIM domain-only (FHL) gene family, and has been shown to play an important role in inhibiting inflammatory angiogenesis. Here, we tested the hypothesis that impaired ischemia-induced neovascularization in mice lacking FHL2 is related to a defect in proangiogenic cell mobilization and functions in vasculogenesis.
Approach and Results—
Unilateral hindlimb ischemia surgery was conducted in FHL2
−/−
mice and wild-type (FHL2
+/+
) mice. After hindlimb ischemia surgery, expression of FHL2 protein was noted in ischemic tissues of wild-type mice. All FHL2-null mice (100%) suffered from spontaneous foot amputation, but only 20% of wild-type mice had ischemia-induced foot amputation after ischemic surgery. Blood flow recovery was significantly impaired in FHL2
−/−
mice when compared with that in wild-type mice as determined by laser Doppler imaging. Histological analysis revealed that the capillary density in the ischemic limb was increased in wild-type mice, whereas no such increase was noted in FHL2
−/−
mice. Flow cytometry demonstrated that the number of CD34
+
or CD34
+
/Sca-1
+
/Flk-1
+
in peripheral blood after ischemic surgery significantly decreased in FHL2-null mice than those in wild-type mice after hindlimb ischemia surgery. FHL2 deficiency impaired ex vivo angiogenesis in mouse aortic-ring culture assay, which revealed that the mean density of the microvessels was significantly higher in the wild-type aorta than in the FHL2
−/−
aorta. Western blot analysis showed that vascular endothelial growth factor (VEGF), interleukin-6, matrix metalloproteinase-2, matrix metalloproteinase-9, vascular cell adhesion molecule-1, and intercellular adhesion molecule-1 levels were significantly downregulated in ischemic muscles in FHL2-null mice compared with wild-type mice. Deletion of FHL2 protein by FHL2 small interfering RNA impaired VEGF production under hypoxia conditions, and also suppressed endothelial progenitor cell angiogenic functions, but these effects could be recovered by administration of VEGF.
Conclusions—
Deficiency of FHL2 impairs ischemia-induced neovascularization, and these suppressive effects may occur through a reduction in proangiogenic cell mobilization, migration, and vasculogenesis functions.
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Affiliation(s)
- Po-Hsun Huang
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Chi-Yu Chen
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Chih-Pei Lin
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Chao-Hung Wang
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Hsiao-Ya Tsai
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Wei-Yuh Lo
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Hsin-Bang Leu
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Jaw-Wen Chen
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Shing-Jong Lin
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
| | - Pao-Hsien Chu
- From the Division of Cardiology (P.-H.H., H.-B.L., J.-W.C., S.-J.L.), Department of Medical Research and Education (J.-W.C., S.-J.L.), Department of Pathology and Laboratory Medicine (C.-P.L.), Healthcare and Management Center (H.-B.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine (P.-H.H.), Institute of Clinical Medicine (P.-H.H., C.-Y.C., C.-H.W., H.-Y.T., W.-Y.L., H.-B.L., S.-J.L.), Cardiovascular Research Center (P.-H.H., C.-H.W., H.-B.L., J.-W.C., S.-J.L.),
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Chao CM, Lai CC, Tsai HY, Wu CJ, Tang HJ, Ko WC, Hsueh PR. Pneumonia caused by Aeromonas species in Taiwan, 2004-2011. Eur J Clin Microbiol Infect Dis 2013; 32:1069-75. [PMID: 23474673 DOI: 10.1007/s10096-013-1852-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 02/26/2013] [Indexed: 12/19/2022]
Abstract
We investigated the clinical characteristics of patients with pneumonia caused by Aeromonas species. Patients with pneumonia caused by Aeromonas species during the period 2004 to 2011 were identified from a computerized database of a regional hospital in southern Taiwan. The medical records of these patients were retrospectively reviewed. Of the 84 patients with pneumonia due to Aeromonas species, possible Aeromonas pneumonia was diagnosed in 58 patients, probable Aeromonas pneumonia was diagnosed in 18 patients, and pneumonia due to Aeromonas was conclusively diagnosed in 8 patients. Most of the cases of Aeromonas pneumonia developed in men and in patients of advanced age. A. hydrophila (n = 50, 59.5 %) was the most common pathogen, followed by A. caviae (n = 24, 28.6 %), A. veronii biovar sobria (n = 7, 8.3 %), and A. veronii biovar veronii (n = 3, 3.6 %). Cancer (n = 37, 44.0 %) was the most common underlying disease, followed by diabetes mellitus (n = 27, 32.1 %). Drowning-associated pneumonia developed in 6 (7.1 %) patients. Of 47 patients who were admitted to the intensive care ward, 42 patients developed acute respiratory failure and 24 of those patients died. The overall in-hospital mortality rate was significantly associated with liver cirrhosis, cancer, initial presentation of shock, and usage of mechanical ventilation. In conclusion, Aeromonas species should be considered as one of the causative pathogens of severe pneumonia, especially in immunocompromised patients, and should be recognized as a cause of drowning-associated pneumonia. Cirrhosis, cancer, and shock as the initial presenting symptom are associated with poor outcome.
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Affiliation(s)
- C M Chao
- Department of Intensive Care Medicine, Chi Mei Medical Center, Liouying, Tainan, Taiwan
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18
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Tsai HY, Huang PH, Lin FY, Chen JS, Lin SJ, Chen JW. Ginkgo biloba extract reduces high-glucose-induced endothelial reactive oxygen species generation and cell adhesion molecule expression by enhancing HO-1 expression via Akt/eNOS and p38 MAP kinase pathways. Eur J Pharm Sci 2013; 48:803-11. [PMID: 23357604 DOI: 10.1016/j.ejps.2013.01.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 01/04/2013] [Accepted: 01/06/2013] [Indexed: 11/30/2022]
Abstract
AIM Hyperglycemia is one of the major risk factors leading to vascular complications in clinical diabetes mellitus. Ginkgo biloba extract (GBE), an antioxidant herbal medicine, possesses anti-inflammatory effects. We examined whether GBE can reduce high glucose-induced endothelial adhesiveness to monocytes, an in vitro sign mimicking in vivo early atherogenesis, through selective regulation of heme oxygenase (HO)-1 expression. METHODS Human aortic endothelial cells (HAECs) were cultured with normal glucose or high glucose (25 mM) for 4 days and subsequently combined with GBE (EGb761, Dr. Willmar Schwabe, Karlsruhe, Germany) treatment in the last 18 h of the 4-day period. The endothelial reactive oxygen species (ROS) generation, adhesion molecule expression and the adhesiveness to monocytes were examined. The specific signal pathways such as HO-1 were also examined. RESULTS High glucose increased ROS generation, adhesion molecule expression and the adhesiveness to monocytes in HAECs. These high glucose-induced phenomena could be suppressed by GBE (100 μg/ml)-induced HO-1 expression in a dose-dependent and time-dependent manner. In addition, jun N-terminal kinases inhibitor or phosphoinositide 3 kinase inhibitor could reduce GBE-induced HO-1 expression. Furthermore, HO-1 inhibitor, HO-1 siRNA, endothelial nitric oxide synthase (eNOS) siRNA, or nuclear factor erythroid 2-related factor (Nrf) 2 siRNA blocked the cytoprotective effects of GBE. Meanwhile, p38/mitogen-activated protein kinase (MAPK) inhibitor could also reduce the effects of GBE on HO-1 induction. CONCLUSION GBE could reduce high glucose-induced endothelial adhesion via enhancing HO-1 expression through the Akt/eNOS and p38/MAPK pathways. Our findings suggest a potential strategy targeting on HO-1 induction by GBE for endothelial protection in the presence of high glucose such as that in diabetes mellitus.
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Affiliation(s)
- Hsiao-Ya Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
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19
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Chen JS, Chen YH, Huang PH, Tsai HY, Chen YL, Lin SJ, Chen JW. Ginkgo biloba extract reduces high-glucose-induced endothelial adhesion by inhibiting the redox-dependent interleukin-6 pathways. Cardiovasc Diabetol 2012; 11:49. [PMID: 22553973 PMCID: PMC3434011 DOI: 10.1186/1475-2840-11-49] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 05/03/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Chronic elevation of glucose level activates vascular inflammation and increases endothelial adhesiveness to monocytes, an early sign of atherogenesis. This study aimed to elucidate the detailed mechanisms of high-glucose-induced endothelial inflammation, and to investigate the potential effects of Ginkgo biloba extract (GBE), an antioxidant herbal medicine, on such inflammation. MATERIALS AND METHODS Human aortic endothelial cells were cultured in high glucose or mannitol as osmotic control for 4 days. The expression of cytokines and adhesion molecules and the adhesiveness of endothelial cells to monocytes were examined. The effects of pretreatment of GBE or N-acetylcysteine, an antioxidant, were also investigated. RESULTS Either high glucose or mannitol significantly increased reactive oxygen species (ROS) production, interleukin-6 secretion, intercellular adhesion molecule-1 (ICAM-1) expression, as well as endothelial adhesiveness to monocytes. The high-glucose-induced endothelial adhesiveness was significantly reduced either by an anti-ICAM-1 antibody or by an interleukin-6 neutralizing antibody. Interleukin-6 (5 ng/ml) significantly increased endothelial ICAM-1 expression. Piceatannol, a signal transducer and activator of transcription (STAT) 1/3 inhibitor, but not fludarabine, a STAT1 inhibitor, suppressed high-glucose-induced ICAM-1 expression. Pretreatment with GBE or N-acetylcysteine inhibited high-glucose-induced ROS, interleukin-6 production, STAT1/3 activation, ICAM-1 expression, and endothelial adhesiveness to monocytes. CONCLUSIONS Long-term presence of high glucose induced STAT3 mediated ICAM-1 dependent endothelial adhesiveness to monocytes via the osmotic-related redox-dependent interleukin-6 pathways. GBE reduced high-glucose-induced endothelial inflammation mainly by inhibiting interleukin-6 activation. Future study is indicated to validate the antioxidant/anti-inflammatory strategy targeting on interleukin-6 for endothelial protection in in vivo and clinical hyperglycemia.
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Affiliation(s)
- Jia-Shiong Chen
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan, Republic of China
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20
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Huang PH, Chen JS, Tsai HY, Chen YH, Lin FY, Leu HB, Wu TC, Lin SJ, Chen JW. Globular adiponectin improves high glucose-suppressed endothelial progenitor cell function through endothelial nitric oxide synthase dependent mechanisms. J Mol Cell Cardiol 2011; 51:109-19. [DOI: 10.1016/j.yjmcc.2011.03.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 03/15/2011] [Indexed: 01/21/2023]
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Tung CJ, Tsai SF, Tsai HY, Chen IJ. Determination of voxel phantom for reference Taiwanese adult from CT image analyses. Radiat Prot Dosimetry 2011; 146:186-190. [PMID: 21511723 DOI: 10.1093/rpd/ncr144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The International Commission on Radiological Protection Publication 103 recommended that ionising radiation doses should be assessed based on voxel phantoms. An anthropomorphic voxel phantom for the Reference Taiwanese Adult was built from analyses of computed tomography (CT) images. Thirty representative adult individuals were selected from normal patients in the hospital, with body mass index between 19.6 and 25.6 for males and 18.8 and 27.0 for females and body height between 163 and 175 cm for males and 152 and 162 cm for females. The Reference Taiwanese Adult was determined from these individuals by analysing their CT images for parameters characterising the size, position and orientation of several organs. Analysed parameters included the volume, surface area, major and minor axes, mean chord length, position relative to the body centre, and orientation with respect to the body axis, for liver, spleen, kidney, stomach, gallbladder and bladder. The person with the highest score was designated the Reference Taiwanese Adult.
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Affiliation(s)
- C J Tung
- Department of Medical Imaging and Radiological Sciences, Chang Gung University, Kweishan 333, Taiwan
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Tsai HY, Liu HL, Hwang YH, Chen CC, Wan YL. SU-E-I-94: Survey of CT Image Quality and Patient Doses in Taiwan. Med Phys 2011. [DOI: 10.1118/1.3611668] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Chen JS, Huang PH, Wang CH, Lin FY, Tsai HY, Wu TC, Lin SJ, Chen JW. Nrf-2 mediated heme oxygenase-1 expression, an antioxidant-independent mechanism, contributes to anti-atherogenesis and vascular protective effects of Ginkgo biloba extract. Atherosclerosis 2010; 214:301-9. [PMID: 21144518 DOI: 10.1016/j.atherosclerosis.2010.11.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [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: 06/27/2010] [Revised: 11/01/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
Abstract
AIMS Vascular protective effects of Ginkgo biloba extract (GBE) may involve both antioxidant-related and anti-inflammatory mechanisms. GBE was recently suggested as a heme oxygenase (HO)-1 inducer. The role of HO-1 in anti-atherogenesis and related vascular protective effects of GBE awaited further clarification. METHODS AND RESULTS Tumor necrosis factor (TNF)-α was used to stimulate adhesiveness of human aortic endothelial cells (HAECs) to monocytes, an in vitro sign simulating atherogenesis. Pretreatment with GBE reduced TNF-α-stimulated endothelial adhesiveness, which could be attenuated by HO-1 inhibitors ZnPP IX or SnPP IX. GBE increased HO-1 expression and enzyme activity in HAECs. Pretreatment with MAP kinase inhibitor SB203580 significantly reduced GBE-induced HO-1 expression. Furthermore, GBE activated the translocation of the transcription factor nuclear factor-erythroid 2-related factor 2 (Nrf2), and increased its binding to the antioxidant response element (ARE) of the HO-1 gene. Pretreatment with PEG-SOD or other antioxidant reagents did not alter GBE-induced endothelial HO-1 expression. In vivo study also showed that GBE treatment could reduce leukocyte adherence to injury arteries, and enhance HO-1 expression in circulating monocytes and in arteries after wire injury, suggesting the in vivo induction of HO-1 by GBE. CONCLUSION GBE could inhibit cytokine-induced endothelial adhesiveness by inducing HO-1 expression via the activation of p38 and Nrf-2 pathways, a mechanism in which oxidative stress is not directly involved. GBE might exert its anti-atherogenesis and vascular protective effects by inducing vascular HO-1 expression.
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Affiliation(s)
- Jia-Shiong Chen
- Institute of Pharmacology, National Yang-Ming University School of Medicine, Taipei, Taiwan, ROC
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Huang PH, Tsai HY, Wang CH, Chen YH, Chen JS, Lin FY, Lin CP, Wu TC, Sata M, Chen JW, Lin SJ. Moderate intake of red wine improves ischemia-induced neovascularization in diabetic mice—Roles of endothelial progenitor cells and nitric oxide. Atherosclerosis 2010; 212:426-35. [DOI: 10.1016/j.atherosclerosis.2010.06.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 06/15/2010] [Accepted: 06/15/2010] [Indexed: 11/30/2022]
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Huang PH, Chen YH, Tsai HY, Chen JS, Wu TC, Lin FY, Sata M, Chen JW, Lin SJ. Intake of Red Wine Increases the Number and Functional Capacity of Circulating Endothelial Progenitor Cells by Enhancing Nitric Oxide Bioavailability. Arterioscler Thromb Vasc Biol 2010; 30:869-77. [DOI: 10.1161/atvbaha.109.200618] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
Red wine (RW) consumption has been associated with a reduction of cardiovascular events, but limited data are available on potential mediating mechanisms. This study tested the hypothesis that intake of RW may promote the circulating endothelial progenitor cell (EPC) level and function through enhancement of nitric oxide bioavailability.
Methods and Results—
Eighty healthy, young subjects were randomized and assigned to consume water (100 mL), RW (100 mL), beer (250 mL), or vodka (30 mL) daily for 3 weeks. Flow cytometry was used to quantify circulating EPC numbers, and in vitro assays were used to evaluate EPC functions. After RW ingestion, endothelial function determined by flow-mediated vasodilation was significantly enhanced; however, it remained unchanged after water, beer, or vodka intake. There were significantly increased numbers of circulating EPC (defined as KDR
+
CD133
+
, CD34
+
CD133
+
, CD34
+
KDR
+
) and EPC colony-forming units only in the RW group (all
P
<0.05). Only RW ingestion significantly enhanced plasma levels of nitric oxide and decreased asymmetrical dimethylarginine (both
P
<0.01). Incubation of EPC with RW (but not beer or ethanol) and resveratrol in vitro attenuated tumor necrosis factor-α–induced EPC senescence and improved tumor necrosis factor-α–suppressed EPC functions and tube formation. Incubation with nitric oxide donor sodium nitroprusside significantly ameliorated the inhibition of tumor necrosis factor-α on EPC proliferation, but incubation with endothelial nitric oxide synthase inhibitor
l
-NAME and PI3K inhibitor markedly attenuated the effect of RW on EPC proliferation.
Conclusion—
The intake of RW significantly enhanced circulating EPC levels and improved EPC functions by modifying nitric oxide bioavailability. These findings may help explain the beneficial effects of RW on the cardiovascular system. This study demonstrated that a moderate intake of RW can enhance circulating levels of EPC in healthy subjects by increasing nitric oxide availability. Direct incubation of EPC with RW and resveratrol can modify the functions of EPC, including attenuation of senescence and promotion of EPC adhesion, migration, and tube formation. These data suggest that RW ingestion may alter the biology of EPC, and these alterations may contribute to its unique cardiovascular-protective effect.
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Affiliation(s)
- Po-Hsun Huang
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Yung-Hsiang Chen
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Hsiao-Ya Tsai
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Jia-Shiong Chen
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Tao-Cheng Wu
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Feng-Yen Lin
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Masataka Sata
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Jaw-Wen Chen
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
| | - Shing-Jong Lin
- From Division of Cardiology (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), Department of Internal Medicine, Department of Medical Research and Education (J.-W.C., S.-J.L.), Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine (P.-H.H., H.-Y.T., S.-J.L.), Institute and Department of Pharmacology (J.-S.C., J.-W.C.), Cardiovascular Research Center (P.-H.H., T.-C.W., J.-W.C., S.-J.L.), National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Integrated Medicine (Y.-H.C.),
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Tsai HY, Liu HL, Hwang YS, Chen CC. SU-FF-I-72: Evaluation and Comparison of Image Quality Figures for Digital Mammography. Med Phys 2009. [DOI: 10.1118/1.3181192] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Liao YL, Tsai HY, Lin JH, Chen CP. SU-FF-I-68: Survey of MSCT and SSCT Scanners in Taiwan: Technical Factors, CTDIs, and Effective Doses. Med Phys 2009. [DOI: 10.1118/1.3181188] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Lai PL, Tsai HY, Li YY, Tyan YS, Tung CJ. SU-FF-I-85: Effects of Automatic Dose Rate Control On Patient Dose in a Digital Flat-Panel Detector System. Med Phys 2009. [DOI: 10.1118/1.3181205] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Huang PH, Chen YH, Wang CH, Chen JS, Tsai HY, Lin FY, Lo WY, Wu TC, Sata M, Chen JW, Lin SJ. Matrix metalloproteinase-9 is essential for ischemia-induced neovascularization by modulating bone marrow-derived endothelial progenitor cells. Arterioscler Thromb Vasc Biol 2009; 29:1179-84. [PMID: 19461050 DOI: 10.1161/atvbaha.109.189175] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Both matrix metalloproteinases (MMPs) and endothelial progenitor cells (EPCs) have been implicated in the process of neovascularization. Here we show that the impaired neovascularization in mice lacking MMP-9 is related to a defect in EPC functions in vasculogenesis. METHODS AND RESULTS Hindlimb ischemia surgery was conducted in MMP-9(-/-) mice and wild-type (MMP-9(+/+)) mice. Blood flow recovery was markedly impaired in MMP-9(-/-) mice when compared with that in wild-type mice as determined by laser Doppler imaging. Flow cytometry demonstrated that the number of EPC-like cells (Sca-1(+)/Flk-1(+)) in peripheral blood increased in wild-type mice after hindlimb ischemia surgery and exogenous vascular endothelial growth factor stimulation, but not in MMP-9(-/-) mice. Plasma levels and bone marrow concentrations of soluble Kit-ligand (sKitL) were significantly elevated in wild-type mice in response to tissue ischemia, but not in MMP-9(-/-) mice. C-kit positive bone marrow cells of MMP-9(-/-) mice have attenuated adhesion and migration than those isolated from wild-type mice. In in vitro studies, incubation with selective MMP-9 inhibitor suppressed the colony formation, migration, and tube formation capacities of EPC. Transplantation of bone marrow cells from wild-type mice restored collateral flow formation in MMP-9(-/-) mice. CONCLUSIONS These findings suggest that MMP-9 deficiency impairs ischemia-induced neovascularization, and these effects may occur through a reduction in releasing the stem cell-active cytokine, and EPC mobilization, migration, and vasculogenesis functions.
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Affiliation(s)
- Po-Hsun Huang
- Division of Cardiology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shih-Pai Road, Taipei, Taiwan
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Liao YL, Tsai HY, Tyan YS, Cheng KY. SU-GG-I-76: Estimating Image Quality and Radiation Dose Reduction with In-Plane Bismuth Shielding for CT Examinations: Phantom Study. Med Phys 2008. [DOI: 10.1118/1.2961474] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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31
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Tsai HY, Chang YC, Tyan YS. SU-GG-I-44: Real-Time Dose Measurements of Automatic Tube Current Modulation in Multislice CT. Med Phys 2008. [DOI: 10.1118/1.2961442] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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32
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Chiang-Hsieh CC, Tsai HY, Tung CJ, Chao TC. SU-GG-I-57: A Mutlidetector CT Model Using BEAMnrc/DOSXYZnrc Code for Estimating Radiation Doses: Phantom Study. Med Phys 2008. [DOI: 10.1118/1.2961455] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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33
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Tsai SF, Tsai HY, Tyan YS. WE-E-332-03: Evaluating Effective Doses and Image Quality for Multislice CT Using Automatic Tube Current Modulation. Med Phys 2008. [DOI: 10.1118/1.2962795] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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34
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Tsai HY, Chen YH, Lin FY, Chen JH, Lin SJ, Chen JW. S21-3 GINKGO BILOBA EXTRACT UPREGULATES ENDOTHELIAL NITRIC OXIDE SYNTHASE AND HEME OXYGENASE-1 EXPRESSION IN HIGH GLUCOSE-STIMULATED HUMAN AORTIC ENDOTHELIAL CELLS. Int J Cardiol 2007. [DOI: 10.1016/s0167-5273(08)70454-6] [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: 11/16/2022]
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Abstract
We report a detection method for C-reactive protein (CRP) based on competitive immunoassay using magnetic nanoparticles under magnetic fields. Functional magnetic nanoparticles were prepared and conjugated with anti-CRP for immunoassay. Magnetic nanoparticles labeled with anti-CRP were flowed through a separation channel to form depositions for selective capture of CRP under magnetic fields. Free CRP and a fixed number of CRP-labeled particles were used to compete for a limited number of anti-CRP binding sites on the magnetic nanoparticles. The deposited percentages of CRP-labeled particles at various concentrations of free CRP were determined and used as a reference plot. The determination of CRP in the unknown sample was deduced from the reference plot using the deposited percentages. The running time was less than 10 min. The CRP concentration of serum sample was linearly over the range of 1.2-310 microg/mL for deposited percentages of CRP-labeled particles. The detection limit of this method was 0.12 microg/mL which was approximately 8-fold lower than the typical clinical cutoff concentration (1 microug/mL). This method can provide a fast, simple, and sensitive way for protein detection based on competitive immunoassay using magnetic nanoparticles under magnetic fields.
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Affiliation(s)
- H Y Tsai
- Department of Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan
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36
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Lin YC, Tsai HY, Chiang-Hsieh CC, Tung CJ. SU-FF-I-45: Evaluation of Age-Dependant Dose and Image Quality for CT. Med Phys 2007. [DOI: 10.1118/1.2760422] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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37
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Tsai HY, Tung CJ, Yu CC, Tyan YS. Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses. Med Phys 2007; 34:1234-43. [PMID: 17500455 DOI: 10.1118/1.2712412] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [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: 12/30/2022] Open
Abstract
The IAEA and the ICRP recommended dose guidance levels for the most frequent computed tomography (CT) examinations to promote strategies for the optimization of radiation dose to CT patients. A national survey, including on-site measurements and questionnaires, was conducted in Taiwan in order to establish dose guidance levels and evaluate effective doses for CT. The beam quality and output and the phantom doses were measured for nine representative CT scanners. Questionnaire forms were completed by respondents from facilities of 146 CT scanners out of 285 total scanners. Information on patient, procedure, scanner, and technique for the head and body examinations was provided. The weighted computed tomography dose index (CTDI(w)), the dose length product (DLP), organ doses and effective dose were calculated using measured data, questionnaire information and Monte Carlo simulation results. A cost-effective analysis was applied to derive the dose guidance levels on CTDI(w) and DLP for several CT examinations. The mean effective dose +/- standard deviation distributes from 1.6 +/- 0.9 mSv for the routine head examination to 13 +/- 11 mSv for the examination of liver, spleen, and pancreas. The surveyed results and the dose guidance levels were provided to the national authorities to develop quality control standards and protocols for CT examinations.
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Affiliation(s)
- H Y Tsai
- Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung 402, Taiwan
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38
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Tsai HY, Hsu FH, Lin YP, Bor Fuh C. Separation method based on affinity reaction between magnetic and nonmagnetic particles for the analysis of particles and biomolecules. J Chromatogr A 2006; 1130:227-31. [PMID: 16765967 DOI: 10.1016/j.chroma.2006.05.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 05/15/2006] [Accepted: 05/16/2006] [Indexed: 12/01/2022]
Abstract
A separation method is reported for particle and biochemical analysis based on affinity interactions between particle surfaces under magnetic field. In this method, magnetic particles with immunoglobulin G (IgG) or streptavidin on the surface are flowed through a separation channel to form a deposition matrix for selectively capturing nonmagnetic analytes with protein A or biotin on the surface due to specific antigen (Ag)--antibody (Ab) interactions. This separation method was demonstrated using model reactions of IgG--protein A and streptavidin-biotin on particle surface. The features of this new separation method are (1) the deposited Ag-Ab complex can be examined and further analyzed under the microscope, (2) a kinetic study of complex binding is possible, and (3) the predeposited matrix can be formed selectively and changed easily. The detection limits were about 10(-11) g. The running time was less than 10 min. The selectivities of studied particles were 94% higher than those of label-controlled particles. This method extends the applications of analytical magnetapheresis to nonmagnetic particles. Preliminary study shows that this separation method has a great potential to provide a simple, fast, and selective analysis for particles, blood cells, and immunoassay related applications.
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Affiliation(s)
- H Y Tsai
- School of Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan
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Tsai HY, Chang CM, Shen JL, Chen LJ, Yang TF, Bor Fuh C. Solid-Phase Microextraction Coupled with Liquid Chromatography for Determination of -Carotene in Food. J Chromatogr Sci 2006; 44:354-8. [PMID: 16884591 DOI: 10.1093/chromsci/44.6.354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Beta-carotene in vegetables and nutritional products is analyzed using solid-phase microextraction (SPME) coupled with liquid chromatography (LC) to improve the speed of analysis and to reduce the consumption of organic solvents. The relative standard deviations (RSDs) of this analytical method for beta-carotene determinations in vegetables and nutritional products are approximately 10% and 5%, respectively. The amount of beta-carotene was found to vary from 0.35 +/- 0.05 ppm to 76.5 +/- 6.9 ppm for several vegetables in Taiwan. This method was linear over the range of 0.4-40 ppm with correlation coefficients higher than 0.997. The experimentally determined level of beta-carotene in nutritional products varied from 3.8 +/- 0.2 ppm to 24.6 +/- 1.1 ppm following SPME-LC. The recoveries of beta-carotene for these measurements following SPME were all higher than 97% +/- 2% (n = 3). The detection limits of beta-carotene for this method were from 0.027 to 0.054 ppm. Conventional solvent extractions take approximately 4-6 h for extraction and reconcentration but SPME takes approximately 1 h. From several tens to hundreds of milliliters, organic solvents can be saved using SPME. SPME provides better analyses on beta-carotene than conventional solvent extraction for nutritional products in terms of speed, precision, simplicity, and solvent consumption.
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Affiliation(s)
- H Y Tsai
- School of Applied Chemistry, Chung Shan Medical University, 110, Sec 1, Chien-kuo N. Road, Taichung 402, Taiwan
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40
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Tsai HY, Yin C, Lin YP, Fuh CB. New method of blood typing using analytical magnetapheresis. J Chromatogr A 2006; 1120:35-7. [PMID: 16384570 DOI: 10.1016/j.chroma.2005.12.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 11/23/2005] [Accepted: 12/06/2005] [Indexed: 10/25/2022]
Abstract
We report a new method of blood typing based on the agglutination of red blood cell (RBC) with serum-treated magnetic particles in analytical magnetapheresis. Blood typing of ABO was demonstrated. The agglutination patterns of RBCs are different for different blood types and can be used to determine the ABO blood typing in analytical magnetapheresis. Six samples can be tested in each run. The running time was less than 10 min. Magnetic particles were prepared in the laboratory. The amount of RBCs needed for the agglutination test was about 1.0 microl of adult blood. The blood typing of ABO was used to illustrate the capable applications of analytical magnetapheresis to nonmagnetic samples like cells without magnetic labels. Analytical magnetapheresis has a great potential for cell related analysis.
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Affiliation(s)
- H Y Tsai
- School of Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan
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41
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Fuh CB, Lai M, Tsai HY, Chang CM. Impurity analysis of 1,4-dioxane in nonionic surfactants and cosmetics using headspace solid-phase microextraction coupled with gas chromatography and gas chromatography–mass spectrometry. J Chromatogr A 2005; 1071:141-5. [PMID: 15865186 DOI: 10.1016/j.chroma.2004.09.012] [Citation(s) in RCA: 41] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
1,4-Dioxane impurity in nonionic surfactants and cosmetics were analyzed using solid-phase microextraction (SPME) coupled with gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Experimental results show that there is no significant difference using SPME-GC and SPME-GC-MS for analysis of 1,4-dioxane in three types of nonionic surfactants at the 95% confidence level. The relative standard deviation (R.S.D.) values of each analytical method were smaller than 3%. The amount of 1,4-dioxane was found to vary from 11.6 +/- 0.3 ppm to 73.5 +/- 0.5 ppm in 30% of nonionic surfactants from manufacturers in Taiwan. These methods were linear over the studied range of 3-150 ppm with correlation coefficients higher than 0.995. The recoveries of 1,4-dioxane for these nonionic surfactants following SPME were all higher than 96 +/- 1% (n = 3). The detection limits of 1,4-dioxane for these nonionic surfactants following SPME were from 0.06 ppm to 0.51 ppm. The experimentally determined level of 1,4-dioxane in cosmetics from manufacturers in Taiwan varied from 4.2 +/- 0.1 ppm to 41.1 +/- 0.6 ppm in 22% of daily used cosmetics following SPME coupled with GC and GC-MS. Conventional solvent extraction takes around 1 h for extraction and reconcentration but SPME takes only around 10 min. SPME provides better analyses of 1,4-dioxane in nonionic surfactants and cosmetics than conventional solvent extraction and head space pretreatments in term of simplicity, speed, precision, detection limit, and solvent consumption.
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Affiliation(s)
- C Bor Fuh
- Department of Applied Chemistry, National Chi Nan University, 1, University Road, Puli, Nantou 545, Taiwan.
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Huang CY, Chueh PJ, Tseng CT, Liu KY, Tsai HY, Kuo WW, Chou MY, Yang JJ. ZAK re-programs atrial natriuretic factor expression and induces hypertrophic growth in H9c2 cardiomyoblast cells. Biochem Biophys Res Commun 2004; 324:973-80. [PMID: 15485649 DOI: 10.1016/j.bbrc.2004.09.156] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2004] [Indexed: 11/17/2022]
Abstract
Various intracellular or intercellular stimuli have been associated with the development of cardiac cell hypertrophy. However, the mechanisms underlying this association are not completely understood. In a previous study we determined that ZAK mRNA expression is abundant in heart. ZAK is a mitogen-activated protein kinase kinase kinase (MAP3K) that activates the stress-activated protein kinase/c-jun N-terminal kinase pathway and activates NF-kappaB. We, therefore, investigated the potential involvement of ZAK (which in cultured H9c2 cardiomyoblast cell is a positive mediator of cell hypertrophy). Our results showed that the expression of a wild-type form of ZAK induces the characteristic hypertrophic growth features, including increased cell size, elevated atrial natriuretic factor expression, and increased actin fiber organization.
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Affiliation(s)
- Chih-Yang Huang
- Institute of Biochemistry, Chung-Shan Medical University, Taichung 402, Taiwan
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43
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Abstract
Analytical magnetapheresis is a newly developed technique for separating magnetically susceptible particles. The magnetically susceptible particles are deposited on a bottom plate after flowing through a thin (< 0.05 cm) separation channel under a magnetic field applied perpendicular to the flow. Particles with various magnetic susceptibilities can be selectively deposited and separated by adjusting the applying magnetic force and flow rates. Magnetic susceptibility is an important parameter for magnetic separation. Magnetic susceptibility determination of various ion-labeled red blood cells (RBCs) using analytical magnetapheresis with a simple theoretical treatment is reported in this study. Susceptibility determination is based on the balance between maximal channel flow rate and magnetically induced flow rate for deposition. We tried a new approach to determine particle magnetic susceptibilities using a balance of magnetic and drag forces to control magnetically induced particle velocities. The Er3+, Fe3+, Cu2+, Mn2+, Co2+, and Ni2+ ions were used to label RBC at various labeling concentrations for susceptibility determination. The susceptibilities determined for various ion-labeled RBC under two magnetic field intensities fell within a 10% range. The average viabilities of various ion-labeled RBCs were 96.1 +/- 0.8%. The susceptibility determination generally took less than 10 min. Determined susceptibilities from analytical magnetapheresis differed by 10% from reference measurements using a superconducting quantum interference device (SQUID) magnetometer. The cost and time for analysis is much less using analytical magnetapheresis. This technique can provide a simple, fast, and economical way for particle susceptibility determinations.
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Affiliation(s)
- C Bor Fuh
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 545, Taiwan.
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44
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Hsu FY, Tsai HY, Hsu CY, Tung CJ, Liao CC, Tsay YS. Dose reconstruction for residents living in buildings with moderate and minor 60Co contamination in rebar. Health Phys 2003; 85:357-364. [PMID: 12938726 DOI: 10.1097/00004032-200309000-00012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Previously, we have reconstructed cohort dependent individual doses for residents living in rebar buildings of high 60Co contamination. These reconstructions were carried out using intensively collected TLD data on exposure rates at locations of 1 m height and 1 m x 1 m intersections. The present work deals with dose reconstructions for residents living in rebar buildings of moderate and minor 60Co contamination. Since only limited data on exposure rates from survey meters were available, dose reconstructions were based on these data using interpolations. To utilize such data, we examined them with respect to all factors that influenced the dose uncertainties. The interpolated results were given in terms of contour plots (isodose curves) and compared with corresponding results derived from TLD data and Monte Carlo simulations. The comparison revealed that survey meter data could be used to provide reasonable and conservative estimates of residential doses. By applying the cohort-dependent room occupancy factor and the site-dependent area occupancy factor, we reconstructed cohort dependent individual doses and associated uncertainties. Results of dose reconstructions for all residents living in contaminated rebar buildings were provided to the Atomic Energy Council and health authorities for epidemiologic and medical uses.
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Affiliation(s)
- F Y Hsu
- Department of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan
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45
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Abstract
Comprehensive analyses and measurements of computed tomography (CT) single-scan dose profiles were performed for several scanners and operating conditions. Measurements were made using two types of thermoluminescent dosimeters, LiF:Mg,Cu,P and CaSO4:Dy, and two CT dosimetry phantoms, head and body. Analyses of CT single-scan dose profiles were made in terms of a Gaussian function for primary radiation and a Lorentzian function for scattered radiation. This function was used to investigate several common descriptions of the CT dose, including the computed tomography dose index (CTDI) and the multiple scan average dose. The relative percentage of scatter versus primary radiation to the contribution of CTDI at the central and peripheral locations was determined and analyzed. The correlation between CTDI of thermoluminescent dosimeter measurements and pencil-shaped ionization chamber measurements was determined. A method for estimating organ dose from CT was developed and compared to organ-dose estimates from Monte Carlo simulations.
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Affiliation(s)
- H Y Tsai
- Department of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan
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46
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Abstract
In this study, we attempted to identify the interactions and mechanisms between veratrine and paeoniflorin on isolated mouse vas deferens. Paeoniflorin had no effect on isolated mouse vas deferens. Veratrine (1 x 10(-5) approximately 1 x 10(-3) g/ml) could directly induce contraction of isolated rat and mouse vas deferens. The concentration induced by veratrine (1 x 10(-5) g/ml) was completely inhibited by Ca2+-free solution and verapamil (1 x 10(-5) M), in both the epididymal and the prostatic portions of isolated mouse vas deferens. Naloxone (1 x 10(-5) M) did not alter the contraction induced by veratrine (1 x 10(-5) g/ml) in either the epididymal or the prostatic portions of isolated mouse vas deferens. Paeoniflorin (4.8 x 10(-5) g/ml) inhibited the contraction induced by veratrine (1 x 10(-5) g/ml) in both the epididymal and the prostatic portions of isolated mouse vas deferens. Paeoniflorin (4.8 x 10(-5) g/ml) potentiated norepinephrine (1 x 10(-5) M)-induced phasic contraction in the epididymal portion, but decreased contractions in the prostatic portion. Paeoniflorin (4.8 x 10(-5) g/ml) increased KCI (56 mM)-induced phasic contraction in the epididymal portion, but decreased the tonic contraction in either the epididymal or the prostatic portion. Veratrine (1 x 10(-5) g/ml)-induced contractions could be decreased by pretreatment with ryanodine (1 x 10(-5) M) in both the epididymal and the prostatic portions. Pretreatment with the combination of paeoniflorin (4.8 x 10(-5) g/ml) and ryanodine (1 x 10(-5) M) did not potentiate the inhibition of paeoniflorin in the veratrine-induced contraction in both the epididymal and the prostatic portions of isolated mouse vas deferens.
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Affiliation(s)
- Y F Chen
- Department of Pharmacology and Institute of Pharmaceutical Sciences, China Medical College, Taichung, Taiwan, ROC
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47
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Ho CC, Tsai HY, Lai YS, Chung JG. Ellagic acid inhibited 2-aminofluorene and p-aminobenzoic acid acetylation by mononuclear leucocytes from Sprague-Dawley rats. Cytobios 2001; 104:107-17. [PMID: 11258539] [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: 02/19/2023]
Abstract
Following exposure of rats to the arylamine carcinogen 2-aminofluorene, DNA-carcinogen adducts were found in the liver and bladder target tissues, and also in circulating leucocytes. This work investigated the effect of ellagic acid on arylamine (2-aminofluorene and p-aminobenzoic acid) acetylations in rat leucocytes. Evidence is presented that rat mononuclear leucocytes are capable of acetylating 2-aminofluorene and p-aminobenzoic acid. Both lymphocytes and monocytes were able to acetylate arylamines during 18 h of culture. Cultured lymphocytes produced about twice as much N-acetyl-2-aminofluorene from 2-aminofluorene and 2.2-fold as much N-acetyl-p-aminobenzoic acid from p-aminobenzoic acid as monocytes. After cotreatment with ellagic acid the lymphocyte and monocyte cultures indicated that ellagic acid reduced 2-aminofluorene acetylation.
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Affiliation(s)
- C C Ho
- Department of Physiology, China Medical College, Taichung, Taiwan, Republic of China
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48
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Abstract
The International Atomic Energy Agency has recommended guidance levels of dose for diagnostic radiography for a typical adult patient. These levels were intended to act as thresholds to trigger investigations or corrective actions in ensuring optimized protection of patients and maintaining appropriate levels of good practice. Since guidance levels should be derived from wide scale surveys of exposure factors performed in individual hospitals, a national survey was conducted recently in Taiwan to collect these factors for the most frequent radiographic procedures. A total of 276 completed questionnaires were received and analyzed. In the questionnaire, respondents were asked to check those projections that were routinely performed in their department and to report machine data, patient data, output measurements, and technical factors including kVp, mAs, focus-to-film distance, table-to-film distance, aluminum filtration, and focal spot size. Based on the survey data, entrance skin exposures in air, i.e., free air exposures at the point of intersection of the x-ray central beam with the entrance surface of the patient, were estimated using the RADCOMP program. Entrance surface doses to air and tissue with backscatter were then evaluated by the application of the exposure-dose conversion factor and the backscatter factor obtained from TLD measurements and Monte Carlo simulations. Guidance levels were determined from survey results on the entrance surface dose based on optimization considerations involving the cost-effectiveness analysis. Except for chest PA and LAT and skull LAT procedures, all guidance levels derived in this work are less than those recommended by the International Atomic Energy Agency. Survey data and guidance levels were provided to the national authorities to help them develop quality control and radiation protection programs for medical exposures.
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Affiliation(s)
- C J Tung
- Department of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan
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49
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Abstract
In this study, we attempted to identify the mechanisms of paeoniflorin on antinociceptive effects in mice. Paeoniflorin (48, 96, 240, 480 microg, i.c.v.) showed dose-related antinociception both on the early and late phases of formalin test in mice. Moreover, paeoniflorin (48 microg, i.c.v.) could potentiate the antinociception of morphrine (0.5, 1.0 mg/kg, s.c.) in the formalin test. However, the antinociceptive effects of paeoniflorin were not potentiated by L-arginine (600 mg/kg, i.p.) or antagonized by beta-funaltrexamine (beta-FNA) (10 microg, i.c.v.), ICI-174,864 (1 microg, i.c.v.) and ryanodine (10 ng, i.c.v.) on both the early and late phases of formalin test. L-NAME (75 mg/kg, i.p.) could reverse the effect of paeoniflorin on the late phase of formalin test. Naloxone (1 mg/kg, i.p.) and nor-binaltorphimine (nor-BNI) (1 microg, i.c.v.) could block the paeoniflorin-induced antinociception on the early phase of formalin test. These results suggested that the central antinociceptive effects of paeoniflorin on formalin test in mice were mediated by the activation of kappa-opioid receptor and not related to the increase of intracellular calcium.
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Affiliation(s)
- H Y Tsai
- Department of Pharmacology, China Medical College, No. 91 Hsueh-Shih Road, Taichung, 404, Taiwan, Taiwan, ROC
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50
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Tsai HY, Wu TJ, Chen HJ, Lu CW. Chylus-like urine as a complication of percutaneous hyperalimentation catheter in an infant: report of one case. Acta Paediatr Taiwan 2001; 42:46-8. [PMID: 11270186] [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: 02/19/2023]
Abstract
A very low-birth-weight neonate developed chylus-like urine after receiving parenteral nutrition (PN) via percutaneous central venous catheters (CVC) for 7 weeks. A perirenal fluid collection could be seen under sonography. This kind of complication has not been described in literature. After withdrawing the CVC for 5 cm, the urine cleared up. For patients under prolonged PN via CVC and repeated change dressing of the CVC, close monitoring and regular evaluation of the position of the catheter tip are warranted.
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Affiliation(s)
- H Y Tsai
- Department of Pediatrics, Provincial Taoyuan Hospital, 1492, Chong Shan Road, Taoyuan 330, Taiwan
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