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Barden A, Shinde S, Tsai IJ, Croft KD, Beilin LJ, Puddey IB, Mori TA. Effect of weight loss on neutrophil resolvins in the metabolic syndrome. Prostaglandins Leukot Essent Fatty Acids 2019; 148:25-29. [PMID: 31492430 DOI: 10.1016/j.plefa.2019.07.001] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Non-resolving inflammation associates with obesity and insulin resistance, and may be dependent on the balance of inflammatory substances and specialised pro-resolving mediators of inflammation (SPM) that act to halt the inflammatory response. This controlled trial examined the effect of weight loss on neutrophil synthesis of SPM in volunteers with the metabolic syndrome (MetS). METHODS Volunteers with MetS (n = 42) were matched for age and gender and randomly assigned to a 12-wk weight loss program followed by 4-wk weight stabilization or a 16-wk weight maintenance program. At baseline and 16 weeks, isolated neutrophils were stimulated with calcium ionophore and the released SPM were measured by LC-MS/MS. RESULTS At baseline the SPM resolvin (Rv) E1, 18R-RvE3, RvD2 and Maresin-1 (MaR-1) were detected from stimulated neutrophils. The concentration of released RvE1 was at least 6-fold that of other detected SPM. Weight loss of 4.7 ± 0.8 kg, led to a 2-fold increase in RvE1, P = 0.013, relative to the weight maintenance group. The increase in RvE1 after weight loss was related to, but independent of leukotriene B4. CONCLUSION: Following weight loss, human neutrophils from individuals with the metabolic syndrome are capable of releasing larger amounts of RvE1 upon stimulation.
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Affiliation(s)
- A Barden
- Medical School, University of Western Australia, Perth, Australia.
| | - S Shinde
- Medical School, University of Western Australia, Perth, Australia
| | - I-J Tsai
- Medical School, University of Western Australia, Perth, Australia
| | - K D Croft
- School of Biomedical Sciences, University of Western Australia, Perth, Australia
| | - L J Beilin
- Medical School, University of Western Australia, Perth, Australia
| | - I B Puddey
- Medical School, University of Western Australia, Perth, Australia
| | - T A Mori
- Medical School, University of Western Australia, Perth, Australia
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Tsai CL, Lee JT, Lien LM, Lin CC, Tsai IJ, Sung YF, Chou CH, Yang FC, Tsai CK, Wang IK, Tseng CH, Hsu CY. The association between septicemia and the risk of multiple sclerosis: a nationwide register-based retrospective cohort study in Taiwan. QJM 2018; 111:605-611. [PMID: 29878253 DOI: 10.1093/qjmed/hcy123] [Citation(s) in RCA: 5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Multiple sclerosis (MS) is the most common inflammatory demyelinating disease of the central nervous system. Few studies focused on the relationship between septicemia and MS. AIM To evaluate the potential impact of septicemia on risk for MS. DESIGN Two cohorts of patients with septicemia and without septicemia were followed up for the occurrence of MS. METHODS Patients of 482 790 with septicemia was enrolled from the National Health Insurance Research Database between 2001 and 2011 as the study group to match the 1 892 820 individuals, as the control group, by age and gender. Incidence of MS in both groups was calculated. Cox proportional-hazards regressions were performed for investigating hazard ratios (HR) for MS between groups. RESULTS Septicemia patients had a 3.06-fold (95% CI: 2.16-4.32, P < 0.001) greater risk of developing MS than the matched group. In addition, higher severity of septicemia was associated with higher risk of developing MS (moderate: HR = 4.03, 95% CI: 2.53-6.45, P < 0.001; severe: HR = 11.1, 95% CI: 7.01-17.7, P < 0.001). Similar results also occurred in both male and female patients with septicemia (male: HR = 4.06, 95% CI: 2.17-7.58, P < 0.001; female: HR = 2.72, 95% CI: 1.79-4.11, P < 0.001). Patients without counterpart comorbidities had a significantly higher risk of MS than the controlled group (HR = 3.02, 95% CI: 2.10-4.35, P < 0.001). CONCLUSION The results indicated septicemia is linked to an increased risk for MS. Aggressively preventing and treating septicemia may be warranted for one of precautionary strategies of MS.
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Affiliation(s)
- C-L Tsai
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - J-T Lee
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - L-M Lien
- Department of Neurology, Shin-Kong WHS Memorial Hospital, Taipei, Taiwan, Republic of China
- School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan, Republic of China
| | - C-C Lin
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - I-J Tsai
- Management Office for Health Data, China Medical University Hospital, College of Medicine, China Medical University, Taichung, Taiwan, Republic of China
| | - Y-F Sung
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - C-H Chou
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - F-C Yang
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - C-K Tsai
- From the Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - I-K Wang
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan, Republic of China
- Department of Internal Medicine, College of Medicine, China Medical University, Taichung, Taiwan, Republic of China
- Division of Kidney Disease, China Medical University Hospital, Taichung, Taiwan, Republic of China
| | - C-H Tseng
- Department of Neurology, China Medical University Hospital, Taichung, Taiwan, Republic of China
| | - C-Y Hsu
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan, Republic of China
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Ding DC, Tsai IJ, Hsu CY, Wang JH, Lin SZ, Sung FC. Risk of hypertension after hysterectomy: a population-based study. BJOG 2018; 125:1717-1724. [PMID: 29953717 DOI: 10.1111/1471-0528.15389] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2018] [Indexed: 01/06/2023]
Affiliation(s)
- D-C Ding
- Department of Obstetrics and Gynaecology; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
- Institute of Medical Sciences; Tzu Chi University; Hualien Taiwan
| | - I-J Tsai
- Management Office for Health Data; China Medical University Hospital; Taichung Taiwan
- College of Medicine; China Medical University; Taichung Taiwan
| | - CY Hsu
- Graduate Institute of Clinical Medical Science; China Medical University; Taichung Taiwan
| | - J-H Wang
- Department of Research; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
| | - S-Z Lin
- Department of Neurosurgery; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
| | - F-C Sung
- Management Office for Health Data; China Medical University Hospital; Taichung Taiwan
- Department of Health Services Administration; China Medical University; Taichung Taiwan
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Tsai IJ, Croft KD, Puddey IB, Beilin LJ, Barden A. 20-Hydroxyeicosatetraenoic acid synthesis is increased in human neutrophils and platelets by angiotensin II and endothelin-1. Am J Physiol Heart Circ Physiol 2011; 300:H1194-200. [PMID: 21239640 DOI: 10.1152/ajpheart.00733.2010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cytochrome P-450 arachidonic acid metabolite 20-HETE is central to the regulation of vascular tone, renal function, and blood pressure and is synthesized in the rat kidney in response to angiotensin II (ANG II) and endothelin-1 (ET-1). There are very few studies examining the cellular synthesis of 20-HETE in humans. We aimed to measure human neutrophil and platelet 20-HETE levels under basal conditions and after ANG II, ET-1, and calcium ionophore (CaI). 20-HETE was measured in human platelets and neutrophils after saline (control), CaI (2.5 μg/ml), and ANG II or ET-1 (10 nmol/l-1 μmol/l) incubations. The effect of cells, which were preincubated with the ω-hydroxylase inhibitor N-hydroxy-N'-(4-butyl-2-methylphenyl) (HET0016, 10 nM), ANG II types 1 or 2 (AT(1) or AT(2)) receptor inhibition with irbesartan (1 μmol/l) or PD-123319 (1 μmol/l), or endothelin receptor subtypes A or B (ET(A) or ET(B)) receptor inhibition with BQ-123 or BQ-778 (100 nmol/l), was studied. Neutrophil and platelet content and release of 20-HETE was significantly increased by CaI and blocked by the ω-hydroxylase inhibitor HET0016. ANG II and ET-1 significantly increased neutrophil and platelet content and release of 20-HETE. ANG II increased 20-HETE via the AT(2) receptor. ET-1 increased 20-HETE through the ET(B) receptor in platelets and both the ET(A) and ET(B) receptors in neutrophils. These studies show that human platelets and neutrophils synthesize 20-HETE in response to ANG II and ET-1. 20-HETE synthesis in both cell types was predominantly mediated via the AT(2) and ET(B) receptors. Stimulation via these receptor pathways has generally been thought to be cardioprotective and requires further studies in clinical situations associated with low-grade inflammation or where ANG II and ET-1 are elevated to clarify the role of 20-HETE.
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Affiliation(s)
- I J Tsai
- School of Medicine and Pharmacology, Royal Perth Hospital, University of Western Australia, Australia
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Tsai IJ, Beilin LJ, Puddey IB, Croft KD, Barden A. Impaired ex vivo leukotriene B4 production characterizes the metabolic syndrome and is improved after weight reduction. J Clin Endocrinol Metab 2007; 92:4747-52. [PMID: 17925339 DOI: 10.1210/jc.2007-1417] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
CONTEXT Neutrophil (polymorphonuclear neutrophil) production of leukotriene B4 (LTB4) may be associated with alterations in immune and inflammatory function that characterize the metabolic syndrome (MetS). OBJECTIVE We investigated whether polymorphonuclear neutrophil production of LTB(4) and its metabolites 20-hydroxy-LTB4 (20-OH-LTB4) and 20-carboxyl-LTB4 were altered in subjects with features of the MetS before and after weight reduction. DESIGN, SETTING, PATIENTS, AND INTERVENTION In a case-controlled comparison, men and postmenopausal women with features of the MetS were matched with controls. Subjects with MetS were then matched and randomly assigned to either a 12-wk weight reduction study followed by 4-wk weight stabilization or 16-wk weight maintenance. MAIN OUTCOME MEASURES Measurements were performed at baseline and at the end of the 16-wk period. Stimulated neutrophil LTB4 and its metabolites were measured by HPLC. RESULTS In the case-controlled study, body mass index, waist circumference, blood pressure, fasting triglycerides, and glucose were all significantly increased in subjects with features of the MetS (P < 0.05). Production of LTB4 and 20-OH-LTB4 was significantly lower compared with controls (P < 0.005). The weight loss intervention resulted in a 4.6-kg reduction in body weight and 6.6-cm decrease in waist circumference relative to controls and a significant increase in LTB4 and 20-OH-LTB4. CONCLUSIONS Subjects with features of the MetS have lower stimulated LTB4, which is not due to increased metabolism of LTB4. Weight reduction restored the production of neutrophil LTB4, suggesting that in addition to modifying cardiovascular risk, weight loss may also help with the management of perturbed inflammatory responses in overweight subjects.
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Affiliation(s)
- I J Tsai
- University of Western Australia, School of Medicine and Pharmacology, Royal Perth Hospital, Perth, Western Australia 6001, Australia
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Abstract
The combination of hepatitis A virus (HAV) and hepatitis B virus (HBV) vaccinations can offer convenience, increased compliance and cost saving. We have studied the immunogenicity, reactogenicity and safety of combined hepatitis A and B vaccination in young adults (16-35 years old). Eighty healthy young adults were divided into two random groups. One group received the combined hepatitis A and B vaccine (HAB) in one arm while the other group was administered concomitant hepatitis A and B vaccines (HAV + HBV) in the right and left arms, respectively. The immunogenicity, reactogenicity and safety were assessed after each dose in both the groups. In local symptoms, the percentage of the combined HAB group was lower than the HAV + HBV group, and the general symptoms were noted in approximately 30% of each group without any significant difference. No serious adverse effects were noted. All the subjects were seropositive for antibody to hepatitis A virus (anti-HAV) after one dose of vaccine, and remained seropositive after three doses in both groups. The seropositive rate for antibody to hepatitis B surface antigen (anti-HBs) was significantly higher (84%) in the combined HAB group than the concomitant HAV + HBV group (62%), (p<0.05) after dose two, and all the subjects were seropositive (100%) after the third dose. The GMTs of anti-HAV and anti-HBs were not significantly different between groups 1 and 2 (p>0.1) except in month 6 when the GMT of anti-HBs was higher in HAB group (p=0.0039). The combined HAB vaccine was found to be safe, well tolerated and had less local symptoms in young adults. The immunogenicity and reactogenicity were similar to the concomitant HAV + HBV vaccines.
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Affiliation(s)
- I J Tsai
- Department o Pediatrics, College of Medicine, National Taiwan University, Taipei, Taiwan
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