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Kim AY, Woo W, Saxena A, Tanidir IC, Yao A, Kurniawati Y, Thakur V, Shin YR, Shin JI, Jung JW, Barron DJ. Treatment of hypoplastic left heart syndrome: a systematic review and meta-analysis of randomised controlled trials. Cardiol Young 2024; 34:659-666. [PMID: 37724575 DOI: 10.1017/s1047951123002986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
BACKGROUND This meta-analysis aimed to consolidate existing data from randomised controlled trials on hypoplastic left heart syndrome. METHODS Hypoplastic left heart syndrome specific randomised controlled trials published between January 2005 and September 2021 in MEDLINE, EMBASE, and Cochrane databases were included. Regardless of clinical outcomes, we included all randomised controlled trials about hypoplastic left heart syndrome and categorised them according to their results. Two reviewers independently assessed for eligibility, relevance, and data extraction. The primary outcome was mortality after Norwood surgery. Study quality and heterogeneity were assessed. A random-effects model was used for analysis. RESULTS Of the 33 included randomised controlled trials, 21 compared right ventricle-to-pulmonary artery shunt and modified Blalock-Taussig-Thomas shunt during the Norwood procedure, and 12 regarded medication, surgical strategy, cardiopulmonary bypass tactics, and ICU management. Survival rates up to 1 year were superior in the right ventricle-to-pulmonary artery shunt group; this difference began to disappear at 3 years and remained unchanged until 6 years. The right ventricle-to-pulmonary artery shunt group had a significantly higher reintervention rate from the interstage to the 6-year follow-up period. Right ventricular function was better in the modified Blalock-Taussig-Thomas shunt group 1-3 years after the Norwood procedure, but its superiority diminished in the 6-year follow-up. Randomised controlled trials regarding medical treatment, surgical strategy during cardiopulmonary bypass, and ICU management yielded insignificant results. CONCLUSIONS Although right ventricle-to-pulmonary artery shunt appeared to be superior in the early period, the two shunts applied during the Norwood procedure demonstrated comparable long-term prognosis despite high reintervention rates in right ventricle-to-pulmonary artery shunt due to pulmonary artery stenosis. For medical/perioperative management of hypoplastic left heart syndrome, further randomised controlled trials are needed to deliver specific evidence-based recommendations.
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Affiliation(s)
- A Y Kim
- Division of Pediatric Cardiology, Department of Pediatrics, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
| | - W Woo
- Department of Thoracic and Cardiovascular Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - A Saxena
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India
| | - I C Tanidir
- Department of Pediatric Cardiology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey
| | - A Yao
- Department of Health Service Promotion, University of Tokyo, Japan
| | - Y Kurniawati
- Department of Pediatric Cardiology, National Cardiovascular Center Harapan Kita, Jakarta, Indonesia
| | - V Thakur
- Department of Pediatrics, Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Y R Shin
- Department of Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - J I Shin
- Department of Pediatrics, Labatt Family Heart Center, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
- Severance Underwood Meta-research Center, Institute of Convergence Science, Yonsei University, Seoul, South Korea
| | - J W Jung
- Division of Pediatric Cardiology, Department of Pediatrics, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
| | - D J Barron
- Division of Cardiovascular Surgery, Department of Surgery, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
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Chen C, Li Z, Xiong X, Yao A, Wang S, Liu X, Liu X, Wang J. Intraperitoneal PD-1 monoclonal antibody for the treatment of advanced primary liver cancer with malignant ascites: a single-arm, single-center, phase Ib trial. ESMO Open 2024; 9:102206. [PMID: 38194882 PMCID: PMC10820330 DOI: 10.1016/j.esmoop.2023.102206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/27/2023] [Accepted: 11/27/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Advanced primary liver cancer patients with malignant ascites have a poor prognosis and lack effective treatment plans. This phase Ib study aims to explore the safety and clinical efficacy of intraperitoneal anti-programmed cell death protein 1 (PD-1) antibody in these patients. PATIENTS AND METHODS Patients received sintilimab 100 mg intraperitoneally plus best supportive care on days 1, 8, and 15 in three cycles of 4 weeks. The course was repeated every 28 days until intolerable toxicity had developed or disease progression. The primary endpoint was safety, while the secondary endpoints were objective response rate (ORR), ascites control rate (ACR), and overall survival (OS). RESULTS From February 2021 through November 2022, a total of 21 patients (14 hepatocellular carcinoma and 7 cholangiocarcinoma) were enrolled to receive intraperitoneal sintilimab. Twelve patients had adverse events (AEs). The most common grade 3 AEs were fatigue, rash, and abdominal pain. No grade ≥4 AEs occurred in any patients. ORR was only evaluated in 13 patients, including partial response in 4, stable disease in 7, and progressive disease in 2. A reduction in the median maximum diameter of the tumor after treatment was observed; however, there was no statistical significance among patients. The objective remission rate of ascites was 43.75%, and the median OS for all 21 patients was 17.6 weeks. CONCLUSIONS This exploratory study represents the first trial to demonstrate the safety and clinical efficacy of intraperitoneal anti-PD-1 antibody administration. No unexpected safety concerns were identified. A large, multicenter, prospective study is needed to confirm the promising clinical efficacy.
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Affiliation(s)
- C Chen
- Department of Oncology, Jinling Hospital, Nanjing Medical University, Nanjing
| | - Z Li
- Department of Oncology, Jinling Hospital, Nanjing Medical University, Nanjing
| | - X Xiong
- Department of Hepatology, Jinling Hospital, Nanjing Medical University, Nanjing
| | - A Yao
- Department of Research Institute of General Surgery, Jinling Hospital, Nanjing Medical University, Nanjing
| | - S Wang
- Department of Research Institute of General Surgery, Jinling Hospital, Nanjing Medical University, Nanjing
| | - X Liu
- Department of Oncology, Jinling Hospital, Nanjing Medical University, Nanjing
| | - X Liu
- Department of Oncology, Jinling Hospital, Nanjing Medical University, Nanjing.
| | - J Wang
- Department of Hematology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing; Yizheng Hospital of Nanjing Drum Tower Hospital Group, Yizheng, PR China.
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McMahon M, Lichvar A, Baran D, Herre J, Yehya A, Sawey E, Badiye A, Cameron C, Yao A, Ingemi A. Use of Apixaban in Heart Transplant Patients Receiving Biopsies: A Case Series. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.804] [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: 11/15/2022] Open
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Siritharan SS, Henry A, Gow ML, Roberts LM, Yao A, Ojurovic M, O'Sullivan AJ. Maternal macro- and micronutrient intake six months after hypertensive versus normotensive pregnancy: is poor diet quality contributing to future cardiometabolic disease risk? Pregnancy Hypertens 2021; 23:196-204. [PMID: 33515976 DOI: 10.1016/j.preghy.2020.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 10/28/2020] [Accepted: 11/09/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Hypertensive pregnancy is associated with increased long-term cardiometabolic disease risk. Assessing dietary intake patterns after hypertensive (HP) versus normotensive pregnancy (NP) may provide insights into the mechanism of this risk. METHODS This study was a prospective sub-study of the P4 (Postpartum, Physiology, Psychology and Paediatrics) cohort. Women were studied six months after NP versus HP (preeclampsia or gestational hypertension). Dietary energy, macronutrient and micronutrient intake were measured using a three-day food diary (FoodWorks™) and assessed against Australian and New Zealand Nutrient Reference Values to determine nutritional adequacy. Comparisons between breastfeeding and non-breastfeeding women were assessed, and linear regression modelling (using hypertensive status, breastfeeding status, and demographic/pregnancy variables) performed to assess predictors of energy intake. RESULTS Seventy-four women (60 NP, 14 HP) were included. HP women had higher mean body mass index (p = 0.02) and lower breastfeeding rates (29% HP versus 83% NP, p < 0.001) compared to NP women. Twenty-four-hour energy intake and total fat intake were 17% and 20% lower after HP respectively. Nutrient deficiencies were prevalent across all participants, however more HP women had inadequate magnesium, calcium and phosphorus intake. Breastfeeding women had significantly increased energy (17%), carbohydrate (15%) and total fat intake (21%), and increased vitamin A, vitamin E, riboflavin, magnesium and iron intake compared to non-breastfeeding women. HP and breastfeeding status were independent predictors of energy intake. CONCLUSIONS HP women had lower micronutrient intake and greater prevalence of nutritional inadequacy compared to NP women, reflecting poorer diet quality and potentially contributing to future increased cardiometabolic disease risk.
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Affiliation(s)
- S S Siritharan
- School of Women's and Children's Health, UNSW Medicine, Level 1 Royal Hospital for Women, Barker Street, NSW 2031, Australia.
| | - A Henry
- School of Women's and Children's Health, UNSW Medicine, Level 1 Royal Hospital for Women, Barker Street, NSW 2031, Australia; Department of Women's and Children's Health, St George Hospital - Prichard Wing Level 1, Gray Street, Kogarah, NSW 2217, Australia; Global Women's Health Program, The George Institute for Global Health, Level 5/1 King Street, Newtown, NSW 2042, Australia
| | - M L Gow
- The University of Sydney Children's Hospital Westmead Clinical School, Corner Hawkesbury Road and Hainsworth Street, Westmead, NSW 2145, Australia
| | - L M Roberts
- Department of Women's and Children's Health, St George Hospital - Prichard Wing Level 1, Gray Street, Kogarah, NSW 2217, Australia; St George and Sutherland Clinical School, Short Street, St George Hospital, Kogarah, NSW 2217, Australia; Faculty of Health - University of Technology Sydney, 235 Jones Street, Ultimo, NSW 2007, Australia
| | - A Yao
- School of Women's and Children's Health, UNSW Medicine, Level 1 Royal Hospital for Women, Barker Street, NSW 2031, Australia; Department of Endocrinology, St George Hospital, Kogarah, NSW 2217, Australia
| | - M Ojurovic
- School of Women's and Children's Health, UNSW Medicine, Level 1 Royal Hospital for Women, Barker Street, NSW 2031, Australia
| | - A J O'Sullivan
- St George and Sutherland Clinical School, Short Street, St George Hospital, Kogarah, NSW 2217, Australia; Department of Endocrinology, St George Hospital, Kogarah, NSW 2217, Australia
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Yang J, Xu G, Zheng J, Wang J, Wang Y, Yao A, Zhao F, Huang D, Shen X, Zhang H, She X. 116P PD-L1 expression profile and microsatellite instability status in Chinese gastric cancer patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.237] [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: 10/23/2022] Open
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Abbas Y, Abdelkader M, Adams M, Addison A, Advani R, Ahmed T, Alexander V, Alexander V, Alli B, Alvi S, Amiraraghi N, Ashman A, Balakumar R, Bewick J, Bhasker D, Bola S, Bowles P, Campbell N, Can Guru Naidu N, Caton N, Chapman J, Chawdhary G, Cherko M, Coates M, Conroy K, Coyle P, Cozar O, Cresswell M, Dalton L, Danino J, Daultrey C, Davies K, Carrie S, Dick D, Dimitriadis PA, Doddi N, Dowling M, Easto R, Edmiston R, Ellul D, Erskine S, Evans A, Farboud A, Forde C, Fussey J, Gaunt A, Gilchrist J, Gohil R, Gosnell E, Grech Marguerat D, Green R, Grounds R, Hall A, Hardman J, Harris A, Harrison L, Hone R, Hoskison E, Howard J, Ioannidis D, Iqbal I, Janjua N, Jolly K, Kamal S, Kanzara T, Keates N, Kelly A, Khan H, Korampalli T, Kuet M, Kul‐loo P, Lakhani R, Lambert A, Lancer H, Leonard C, Lloyd G, Lowe E, Mair J, Maughan E, Gao C, Mayberry T, McCadden L, McClenaghan F, McKenzie G, Mcleod R, Meghji S, Mian M, Millington A, Mirza O, Mistry S, Molena E, Morris J, Myuran T, Navaratnam A, Noon E, Okonkwo O, Oremule B, Pabla L, Papesch E, Puranik V, Roplekar R, Ross E, Rudd J, Schechter E, Senior A, Sethi N, Sharma S, Sharma R, Shelton F, Sherazi Z, Tahir A, Tikka T, Tkachuk Hlinicanova O, To K, Tse A, Toll E, Ubayasiri K, Unadkat S, Upile N, Vijendren A, Walijee H, Wilkie M, Williams R, Williams M, Wilson G, Wong W, Wong G, Xie C, Yao A, Zhang H, Ellis M, Mehta N, Milinis K, Tikka T, Slovick A, Swords C, Hutson K, Smith ME, Hopkins C, Ng Kee Kwong F. Nasal Packs for Epistaxis: Predictors of Success. Clin Otolaryngol 2020; 45:659-666. [DOI: 10.1111/coa.13555] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 03/08/2020] [Accepted: 04/13/2020] [Indexed: 11/30/2022]
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Yao A, Ingargiola MJ, Lopez CD, Sanati-Mehrizy P, Burish NM, Jablonka EM, Taub PJ. Total penile reconstruction: A systematic review. J Plast Reconstr Aesthet Surg 2018; 71:788-806. [PMID: 29622476 DOI: 10.1016/j.bjps.2018.02.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 01/28/2018] [Accepted: 02/03/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Phalloplasty poses a unique challenge to the plastic and reconstructive surgeon. The development of advanced microsurgical techniques has greatly augmented the range of surgical approaches available. METHODS A systematic review of the MEDLINE and Cochrane databases was performed to identify clinical studies of total penile reconstruction published within the last 10 years using the search algorithm: "(phallus or penis or penile) and (reconstruction or phalloplasty or transplant)". RESULTS The primary literature search retrieved 1400 articles. After applying inclusion and exclusion criteria, 30 studies were selected for review. The radial forearm free flap is the preferred technique for total phalloplasty; however, other techniques including the fibular osteocutaneous flap, anterolateral thigh flap, latissimus dorsi flap, scapular free flap, and abdominal flap are described. Background, indications, and preoperative and postoperative care are also discussed. CONCLUSIONS Total penile reconstruction can provide functional, aesthetic, and psychosocial benefits to the patient. Use of the radial forearm free flap has been proposed as the gold standard; however, the wide range of potential complications associated with phalloplasty warrants an individualized approach to each patient.
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Affiliation(s)
- A Yao
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - M J Ingargiola
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - C D Lopez
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - P Sanati-Mehrizy
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - N M Burish
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - E M Jablonka
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - P J Taub
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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Yao A, Bates TJ, Pearson J, Robinson M, Ward C, Powell J. Laryngeal candidiasis: Our experience from sixty biopsy specimens. Clin Otolaryngol 2017; 43:729-732. [PMID: 29159984 PMCID: PMC6221117 DOI: 10.1111/coa.13034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2017] [Indexed: 11/28/2022]
Affiliation(s)
- A Yao
- Department of Otolaryngology, Head and Neck Surgery, Stepping Hill Hospital, Stockport, UK
| | - T J Bates
- Department of Cellular Pathology, Royal Victoria Infirmary, Newcastle Upon Tyne, UK
| | - J Pearson
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle Upon Tyne, UK
| | - M Robinson
- Department of Cellular Pathology, Royal Victoria Infirmary, Newcastle Upon Tyne, UK
| | - C Ward
- Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, UK
| | - J Powell
- Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, UK.,Department of Otolaryngology, Head and Neck Surgery, Freeman Hospital, Newcastle Upon Tyne, UK
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Franz C, Yao A, Panizzon M, Kremen W. GENETIC AND ENVIRONMENTAL INFLUENCES ON MEDICAL BURDEN AND SUBJECTIVE HEALTH IN MIDLIFE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- C.E. Franz
- University of California San Diego, La Jolla, California
| | - A. Yao
- University of California San Diego, La Jolla, California
| | - M. Panizzon
- University of California San Diego, La Jolla, California
| | - W.S. Kremen
- University of California San Diego, La Jolla, California
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Affiliation(s)
- C.E. Franz
- University of California San Diego, La Jolla, California,
| | - A. Beck
- San Diego State University, San Diego, California
| | - A. Yao
- University of California San Diego, La Jolla, California,
| | - W.S. Kremen
- University of California San Diego, La Jolla, California,
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Yao A, Leckenby S, Ivy A, Issing W. Audit: Improving antibiotic prescribing in ENT inpatients. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.221] [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: 11/17/2022]
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Clarke S, Julie I, Yao A, Venugopal S, Kiefer M, Bang H, AlJahany M, Danielson A, Bair A. 322 A Longitudinal Exploration of In Situ Mock Code Events and the Performance of Cardiac Arrest Skills. Ann Emerg Med 2016. [DOI: 10.1016/j.annemergmed.2016.08.338] [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: 10/20/2022]
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Abstract
Introduction In 2011 The Royal College of Surgeons of England (RCS) set out best practice standards for emergency surgery. This national pilot audit aimed to determine the compliance of otolaryngology departments in England with these published guidelines. Methods A 26-item online questionnaire was devised that encompassed all the 36 best practices as set out by the RCS for ear, nose and throat (ENT) surgery. This was sent to ENT trainees and consultants based at units in England providing emergency ENT services. Results Data were obtained from 55 of the 102 units (response rate: 54%). A mean compliance of 71% was achieved (range: 25-94%). No units achieved all of the best practices. The standards with the highest compliance included 24-hour availability of blood transfusion and haematology opinion for patients with epistaxis, availability of a consultant or ST3/equivalent for immediate discussion of severe post-tonsillectomy bleeding, 24-hour access to blood transfusion for arrest of haemorrhage and immediate theatre access for arrest of haemorrhage. The areas with the lowest compliance were provision of a pathway for angiography/embolisation for epistaxis and provision of an equipped ENT room on a paediatric ward. Conclusions This audit has highlighted that the majority of departments in England are providing a good standard of ENT emergency care. There is room for improvement in certain areas, such as the provision of an embolisation pathway in the context of refractory epistaxis. We hope that this audit will encourage ENT departments to evaluate their current provision of emergency care and institute changes (where necessary) to maintain and improve their practices.
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Affiliation(s)
- S Sharma
- University Hospitals of Leicester NHS Trust , UK
| | - A Yao
- Newcastle upon Tyne Hospitals NHS Foundation Trust , UK
| | | | - R Persaud
- Al Zahra Hospital, Sharjah and Dubai , United Arab Emirates
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Gupta S, Yao A, Mahalingam S, Persaud R. ENT emergency surgery – Are we complying with the royal college of surgeons of England standards? A national pilot audit. Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.226] [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: 11/15/2022]
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Ye R, Hu Y, Yao A, Yang Y, Shi Y, Jiang Y, Zhang J. Impact of renin-angiotensin system-targeting antihypertensive drugs on treatment of Alzheimer's disease: a meta-analysis. Int J Clin Pract 2015; 69:674-81. [PMID: 25721930 DOI: 10.1111/ijcp.12626] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE The impacts of renin-angiotensin system (RAS)-targeting antihypertensive drugs on Alzheimer's disease (AD) remain controversial. We performed this meta-analysis to evaluate the precise value of RAS-targeting antihypertensive drugs in terms of attenuating incidence of AD and slowing down cognitive decline in patients with AD. METHODS A systematic literature search was conducted using PubMed, Embase, ScienceDirect and CBM (China Biology Medicine Disc) before September 2014. Studies analysing incidence of AD and cognitive changes in AD patients with RAS-targeting antihypertensive drugs were identified. The principal outcome measures were hazard ratios (HRs) for incidence of AD and standardised mean difference (SMD) for cognitive changes in AD patients. Pooled data were calculated using fixed or random effects models according to the heterogeneity. RESULTS In total, 12 studies involving 896,410 participants met our inclusion criteria. RAS-targeting antihypertensive drugs were significantly associated with a reduced incidence rate of AD (HR 0.81, 95% CI 0.72-0.92, p = 0.001). In subgroup analysis, both angiotensin renin blockers and angiotensin converting enzyme inhibitors were shown to effectively decrease the incidence rate of AD. In the analysis of cognitive changes, a slower rate of cognitive decline was observed in AD patients with RAS-targeting antihypertensive drug (SMD 0.30, 95% CI 0.09-0.50, p = 0.004), when randomised trials and observational trials were combined. However, analysis of randomised trials alone did not show the same result (SMD 0.20, 95% CI -0.10 to 0.50, p = 0.182). CONCLUSIONS Renin-angiotensin system-targeting antihypertensive drugs may be a potential treatment for reducing the incidence and progression of AD. Further studies on RAS-targeting antihypertensive drugs, especially large randomised clinical trials, should be conducted in the future.
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Affiliation(s)
- R Ye
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Y Hu
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - A Yao
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Y Yang
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Y Shi
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Y Jiang
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - J Zhang
- Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
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Fujino T, Hatano M, Yao A, Nitta D, Muraoka H, Minatsuki S, Imamura T, Inaba T, Maki H, Kinugawa K, Komuro I. The Reliability of 6-Minute Walk Test to Predict Exercise Capacity in Patients With Pulmonary Hypertension. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Maki H, Hatano M, Muraoka H, Minatsuki S, Fujino T, Imamura T, Inaba T, Yao A, Kinugawa K, Komuro I. Pulmonary Vasodilators Can Reverse Out-of-Proportional Pulmonary Hypertension in Patients with Left Cardiac Disease. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.840] [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: 10/25/2022] Open
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Kato N, Kinugawa K, Nakayama E, Tsuji T, Kumagai Y, Hatano M, Yao A, Jaarsma T, Komuro I, Nagai R. Insufficient self-care is an independent risk factor for cardiac events in Japanese patients with heart failure: a 2-year follow-up study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Maki H, Hatano M, Yao A, Imamura T, Inaba T, Shiga T, Kinugawa K, Nagai R. THU0248 Efficacy of imatinib mesylate on scleroderma associated pulmonary arterial hypertension. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2213] [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: 11/03/2022]
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Kato N, Kinugawa K, Endo M, Kagami Y, Imamura T, Muraoka H, Minatsuki S, Inaba T, Maki H, Shiga T, Hatano M, Yao A, Kyo S, Komuro I, Ono M. Differential Impacts of Implantable Ventricular Assist Device on Quality of Life and Depression in Patients with Heart Failure and Their Caregivers. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.277] [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: 10/27/2022] Open
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21
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Maki H, Hatano M, Yao A, Imamura T, Asada K, Inaba T, Shiga T, Kinugawa K, Nagai R. 615 Efficacy of Imatinib Mesylate on Scleroderma Associated Pulmonary Arterial Hypertension. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.629] [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: 10/28/2022] Open
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22
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Taniguchi T, Asano Y, Hatano M, Tamaki Z, Tomita M, Kawashima T, Miyazaki M, Sumida H, Akamata K, Takahashi T, Ichimura Y, Toyama T, Sugita M, Noda S, Yao A, Kinugawa K, Sato S. Effects of bosentan on nondigital ulcers in patients with systemic sclerosis. Br J Dermatol 2011; 166:417-21. [PMID: 21848685 DOI: 10.1111/j.1365-2133.2011.10581.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Bosentan is an oral dual endothelin receptor antagonist, which has been shown to be efficacious for preventing new digital ulcers in patients with systemic sclerosis (SSc) in two high-quality randomized controlled trials. However, its efficacy for nondigital ulcers in SSc remains unknown. OBJECTIVES To evaluate the efficacy of bosentan on nondigital ulcers in patients with SSc. METHODS Bosentan was administered to five patients with SSc with pulmonary arterial hypertension, who also had nondigital ulcers refractory to conventional treatments. The efficacy of bosentan on nondigital ulcers and its association with clinical features of ulcers were analysed. RESULTS The nondigital ulcers refractory to conventional treatments were significantly improved by the administration of bosentan in cases surrounded with severe cyanosis. In contrast, nondigital ulcers without cyanosis were still refractory to bosentan therapy. CONCLUSIONS Bosentan may be efficacious for accelerating the healing of nondigital ulcers with severe cyanosis, suggesting that nondigital ulcers caused by severely impaired peripheral circulation are highly responsive to this treatment.
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Affiliation(s)
- T Taniguchi
- Departments of Dermatology and Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Yao A, Iwamoto H, Morizane S, Hinata N, Isoyama T, Michimoto K, Kodani K, Sejima T, Ogawa T, Takenaka A. UP-02.180 Initial Experience of Iodine-125 (I-125) Permanent Seed-Implant Brachytherapy for Localized Prostate Cancer. Urology 2011. [DOI: 10.1016/j.urology.2011.07.998] [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: 10/15/2022]
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24
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Morizane S, Iwamoto H, Inoue S, Matsumoto M, Yao A, Hinata N, Honda M, Isoyama T, Sejima T, Takenaka A. UP-03.151 Significance of Hemoglobin Value Before Gemcitabine/Cisplatin or Carboplatin Treatment as an Independent Prognostic Biomarker in Advanced Urothelial Cancer. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Pengpan T, Smith ND, Qiu W, Yao A, Mitchell CN, Soleimani M. A motion-compensated cone-beam CT using electrical impedance tomography imaging. Physiol Meas 2010; 32:19-34. [DOI: 10.1088/0967-3334/32/1/002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Oulai S, Cissé L, Enoh J, Yao A, Maho S, Andoh J. Vécu psychologique des mères de nouveau-nés malformés dans le centre hospitalier et universitaire de Treichville (Côte-d’Ivoire). Arch Pediatr 2008; 15:357-61. [DOI: 10.1016/j.arcped.2007.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Revised: 12/04/2007] [Accepted: 12/27/2007] [Indexed: 11/16/2022]
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27
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Couitchéré GLS, Niangué-Beugré M, Oulaï SM, Kouma M, Yao A, Atimère YN, Andoh J. [Evaluation of direct costs of child severe malaria management at the general hospital of Bonoua, Côte-d'Ivoire]. Arch Pediatr 2005; 12:332. [PMID: 15734134 DOI: 10.1016/j.arcped.2004.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2004] [Accepted: 12/17/2004] [Indexed: 11/24/2022]
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28
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Yao A, Harada M, Matsueda S, Ishihara Y, Shomura H, Noguchi M, Matsuoka K, Hara I, Kamidono S, Itoh K. Identification of parathyroid hormone-related protein-derived peptides immunogenic in human histocompatibility leukocyte antigen-A24+ prostate cancer patients. Br J Cancer 2004; 91:287-96. [PMID: 15199397 PMCID: PMC2409818 DOI: 10.1038/sj.bjc.6601960] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Parathyroid hormone-related protein (PTHrP) is a key factor in the development of bone metastases, which are a major barrier in treating prostate cancer patients. In this study, we attempted to identify PTHrP-derived peptides immunogenic in human histocompatibility leukocyte antigen (HLA)-A24(+) prostate cancer patients. Among four different PTHrP peptides carrying the HLA-A24 binding motif, both the PTHrP(36-44) and PTHrP(102-111) peptides efficiently induced peptide-specific cytotoxic T lymphocytes from peripheral blood mononuclear cells (PBMCs) of HLA-A24(+) prostate cancer patients. Peptide-stimulated PBMCs showed cytotoxicity against prostate cancer cells in an HLA-A24-restricted manner. Experiments using antibodies and cold inhibition targets confirmed that their cytotoxicity was dependent on PTHrP peptide-specific and CD8(+) T cells. Immunoglobulin G reactive to the PTHrP(102-111) or PTHrP(110-119) peptide was frequently detected in the plasma of prostate cancer patients, suggesting that the PTHrP(102-111) peptide is able to elicit cellular and humoral immune responses in cancer patients. These results indicate that the PTHrP could be a promising target molecule for specific immunotherapy of HLA-A24(+) prostate cancer patients with metastases.
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Affiliation(s)
- A Yao
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
| | - M Harada
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
- Department of Immunology, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan. E-mail:
| | - S Matsueda
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
| | - Y Ishihara
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
| | - H Shomura
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
| | - M Noguchi
- Department of Urology, Kurume University School of Medicine, Fukuoka, Japan
| | - K Matsuoka
- Department of Urology, Kurume University School of Medicine, Fukuoka, Japan
| | - I Hara
- Division of Urology, Department of Organs Therapeutics, Faculty of Medicine, Kobe University Graduate School of Medicine, Hyogo, Japan
| | - S Kamidono
- Division of Urology, Department of Organs Therapeutics, Faculty of Medicine, Kobe University Graduate School of Medicine, Hyogo, Japan
| | - K Itoh
- Department of Immunology, Kurume University School of Medicine, Fukuoka, Japan
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29
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Oréga M, Couitchère L, Yao A, Cisse L, Enoh J, Niangue M, Oulai M, Andoh J. [Tumoral pathology in foreign children in Abidjan]. Arch Pediatr 2004; 11:156. [PMID: 14761739 DOI: 10.1016/j.arcped.2003.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2003] [Accepted: 11/03/2003] [Indexed: 11/24/2022]
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30
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Enoh J, Oréga M, Yao A, Cisse L, Couitchère L, Attimère Y, Niangue M, Andoh J. Diarrhées cholériformes de l’enfant à Abidjan. Arch Pediatr 2003; 10:1009-10. [PMID: 14613700 DOI: 10.1016/j.arcped.2003.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Park KD, Kim J, Yang SJ, Yao A, Park JB. Preliminary study of interfacial shear strength between PMMA precoated UHMWPE acetabular cup and PMMA bone cement. J Biomed Mater Res B Appl Biomater 2003; 65:272-9. [PMID: 12687720 DOI: 10.1002/jbm.b.10006] [Citation(s) in RCA: 16] [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] [Indexed: 11/07/2022]
Abstract
Followed by successful demonstration of high interfacial tensile strength in a new design of cemented all-polyethylene acetabular cup, interfacial shear strength was investigated in this study, with the use of canine-size prototypes of polymethylmethacrylate (PMMA) precoated UHMWPE acetabular cups. In addition to the PMMA precoated prototypes, three different types of controls were also prepared and tested: grooved UHMWPE cups, PMMA (bone cement) cups, and noncoated, plain UHMWPE cups. The interfacial shear strength of the precoated prototypes was 10.1 +/- 0.69 MPa (n = 6), whereas it was 24.3 +/- 0.78 MPa (n = 2) for the PMMA cup, 6.95 +/- 0.21 MPa (n = 2) for the grooved UHMWPE cup, and 0.34 +/- 0.47 MPa (n = 2) for the UHMWPE cup. These results indicate benefits of the PMMA precoating to stabilize the polyethylene acetabular cup securely when applied with bone cement in simulated clinical applications. Analysis of the failed PMMA precoated UHMWPE prototype cups suggested that the chemically induced bonds between precoated PMMA layer and bone cement played a key role in developing high shear strength. After the interfacial shear test of the PMMA precoated prototypes, major disruptions at the interface between treated UHMWPE and precoated PMMA layer were observed by scanning electron microscopy (SEM), which was a unique failure pattern, not found with other prototypes.
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Affiliation(s)
- K D Park
- Department of Biomedical Engineering, 330 Engineering Technology Building, The University of Memphis, Memphis, Tennessee 38152, USA.
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32
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Boye T, Yao A, Fournier B, Guennoc G, Carsuzaa F. Une nouvelle expression du syndrome du canal carpien : Les pulpes digitales « déshabitées. Rev Med Interne 2002. [DOI: 10.1016/s0248-8663(02)80602-6] [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] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Boye T, Yao A, Gisserot O, Fournier B, Guennoc B, Carsuzaa F. Un tableau stéréotypé: La granulomatose sur cicatrice de zona au cours de la LLC. Rev Med Interne 2002. [DOI: 10.1016/s0248-8663(02)80511-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
BACKGROUND Recent studies from our laboratory have demonstrated that in vivo contractile function of rejecting mouse heterotopic abdominal heart allografts 5 days after transplantation is depressed to 40% of that of syngenic controls, and that this depression of function is prevented by the nitric oxide synthase (NOS) inhibitor NG-monomethyl-l-arginine. However, the mechanisms of altered myocyte function caused by nitric oxide production in this setting are not established. METHODS We measured intracellular calcium concentration ([Ca2+]i) transients (fluo-3, confocal microscopy), fractional shortening (video motion), and L-type Ca2+ currents (whole-cell patch clamp) 5 days after transplantation in ventricular myocytes freshly isolated from syngenic (Balb/C into Balb/C) and allogenic (Balb/C into C3H) transplants. RESULTS L-type Ca2+ currents, [Ca2+]i transient amplitudes, and fractional shortening did not differ between nonrejecting, syngenic and rejecting, allogenic transplants. Catecholamine responsiveness as analyzed by the change in the peak [Ca2+]i transient induced by 100 nM isoproterenol was also similar. Superfusion with l-arginine, an NOS substrate, caused decreased shortening with no change in [Ca2+]i transients in allogenic myocytes, but had no effect in syngenic myocytes. CONCLUSIONS Depressed contractile function of rejecting allogenic heart transplants in vivo appears to be caused in part by an NOS-dependent decrease in myofilament Ca2+ sensitivity.
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Affiliation(s)
- M Ritter
- Division of Cardiology, University of Utah Health Sciences Center, 50 North Medical Drive, Salt Lake City, UT 84132, USA
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36
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Desgrées-du-Loû A, Msellati P, Viho I, Yao A, Yapi D, Kassi P, Welffens-Ekra C, Mandelbrot L, Dabis F. Incidence of pregnancies among African HIV-infected women, Abidjan, 1995-2000. AIDS 2001; 15:2327-30. [PMID: 11698710 DOI: 10.1097/00002030-200111230-00018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- A Desgrées-du-Loû
- Institut de Recherche pour le Développement (IRD) (ex ORSTOM) O4 BP 293, Abidjan, Côte d'Ivoire
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37
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Takahashi T, Sugishita Y, Kinugawa K, Shimizu T, Yao A, Harada K, Matsui H, Nagai R. Ets-1 is involved in transcriptional regulation of the chick inducible nitric oxide synthase gene in embryonic ventricular myocytes. Mol Cell Biochem 2001; 226:57-65. [PMID: 11768239 DOI: 10.1023/a:1012781618109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In order to elucidate roles of Ets family of transcription factors in transcriptional activation of inducible nitric oxide synthase (iNOS) genes, we analyzed the chick iNOS gene expression in cultured chick embryonic ventricular myocytes (CEVM). Deletional analysis and site-directed mutagenesis demonstrated that both the Ets/PEA3 site (-221 to -216 bp) and the kappaB site (-101 to -93 bp) of the 5'-flanking region of the chick iNOS gene were involved in the maximal activation of the lipopolysaccharide (LPS)-induced expression of the reporter (luciferase) gene, although the proximal kappaB site played the more essential role. Electrophoretic mobility shift assay revealed that LPS augmented the nuclear protein bindings to the Ets/PEA3 as well as kappaB motifs. Ets-1, one of the Ets proteins, was suggested to be bound to the Ets/PEA3 oligonucleotide. By Northern blot analysis, LPS was shown to induce iNOS mRNA in CEVM, along with a preceding increase in the levels of c-ets-1 mRNA. Ets-1 may be involved in the iNOS gene transcription in CEVM, presumably through interacting with the NF-kappaB.
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Affiliation(s)
- T Takahashi
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, Japan.
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Harada K, Shimizu T, Sugishita Y, Yao A, Suzuki J, Takenaka K, Hirata Y, Nagai R, Takahashi T. Hypertrophic cardiomyopathy with midventricular obstruction and apical aneurysm: a case report. Jpn Circ J 2001; 65:915-9. [PMID: 11665799 DOI: 10.1253/jcj.65.915] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A 71-year-old woman had hypertrophic cardiomyopathy associated with midventricular obstruction and an apical aneurysm in the left ventricle. She had had abnormal electrocardiograms for more than 30 years and for the past year had been suffering from occasional attacks of dizziness and low systemic blood pressure. Holter 24-h electrocardiographic monitoring revealed ventricular paroxysmal contractions (676/day) with nonsustained ventricular tachycardia. Doppler echocardiography revealed paradoxical jet flow from the apical aneurysm to the left ventricular outflow during early diastole. Magnetic resonance imaging depicted midventricular hypertrophy and a dyskinetic thin apical wall, which were confirmed by angiography. Coronary angiograms showed no narrowing of the major extramural coronary arteries, but there was compression of aberrant coronary arteries apparently feeding the hypertrophic portion of the left ventricular wall. Stress thallium-201 myocardial imaging showed a persistent severe defect in the left ventricular apex. A hemodynamic study revealed low cardiac output and an intraventricular pressure gradient (approximately 90 mmHg) between the left ventricular apical high-pressure chamber and the subaortic low-pressure chamber. The present case represents a rare combination of hypertrophic cardiomyopathy, midventricular obstruction, and an apical aneurysm in an elderly woman. Myocardial ischemia may have played an important role in the genesis of the apical aneurysm.
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Affiliation(s)
- K Harada
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, Japan.
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Zou Y, Yao A, Zhu W, Kudoh S, Hiroi Y, Shimoyama M, Uozumi H, Kohmoto O, Takahashi T, Shibasaki F, Nagai R, Yazaki Y, Komuro I. Isoproterenol activates extracellular signal-regulated protein kinases in cardiomyocytes through calcineurin. Circulation 2001; 104:102-8. [PMID: 11435346 DOI: 10.1161/hc2601.090987] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Extracellular signal-regulated kinases (ERKs) and calcineurin have been reported to play important roles in the development of cardiac hypertrophy. We examined here the relation between calcineurin and ERKs in cardiomyocytes. METHODS AND RESULTS Isoproterenol activated ERKs in cultured cardiomyocytes of neonatal rats, and the activation was abolished by chelation of extracellular Ca(2+) with EGTA, blockade of L-type Ca(2+) channels with nifedipine, or depletion of intracellular Ca(2+) stores with thapsigargin. Isoproterenol-induced activation of ERKs was also significantly suppressed by calcineurin inhibitors in cultured cardiomyocytes as well as in the hearts of mice. Isoproterenol failed to activate ERKs in either the cultured cardiomyocytes or the hearts of mice that overexpress the dominant negative mutant of calcineurin. Isoproterenol elevated intracellular Ca(2+) levels at both systolic and diastolic phases and dose-dependently activated calcineurin. Inhibition of calcineurin also attenuated isoproterenol-stimulated phosphorylation of Src, Shc, and Raf-1 kinase. The immunocytochemistry revealed that calcineurin was localized in the Z band, and isoproterenol induced translocation of calcineurin and ERKs into the nucleus. CONCLUSIONS Calcineurin, which is activated by marked elevation of intracellular Ca(2+) levels by the Ca(2+)-induced Ca(2+) release mechanism, regulates isoproterenol-induced activation of ERKs in cardiomyocytes.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adaptor Proteins, Vesicular Transport
- Adrenergic beta-Agonists/pharmacology
- Animals
- Calcineurin/genetics
- Calcineurin/metabolism
- Calcineurin Inhibitors
- Calcium/antagonists & inhibitors
- Calcium/metabolism
- Calcium Channel Blockers/pharmacology
- Calcium Channels, L-Type/metabolism
- Calcium-Calmodulin-Dependent Protein Kinase Type 2
- Calcium-Calmodulin-Dependent Protein Kinases/biosynthesis
- Calcium-Calmodulin-Dependent Protein Kinases/genetics
- Cardiomegaly/enzymology
- Cells, Cultured
- Chelating Agents/pharmacology
- Dose-Response Relationship, Drug
- Enzyme Activation/drug effects
- Enzyme Inhibitors/pharmacology
- Heart Ventricles/cytology
- Heart Ventricles/drug effects
- Heart Ventricles/enzymology
- Isoproterenol/pharmacology
- Mice
- Mice, Inbred ICR
- Mice, Transgenic
- Mitogen-Activated Protein Kinase 1/genetics
- Mitogen-Activated Protein Kinase 1/metabolism
- Mutagenesis, Site-Directed
- Myocardium/cytology
- Myocardium/enzymology
- Phosphorylation/drug effects
- Proteins/metabolism
- Proto-Oncogene Proteins c-raf/metabolism
- Rats
- Rats, Wistar
- Shc Signaling Adaptor Proteins
- Src Homology 2 Domain-Containing, Transforming Protein 1
- Transfection
- src-Family Kinases/metabolism
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Affiliation(s)
- Y Zou
- Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, Chiba
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Harada K, Sugishita Y, Shimizu T, Yao A, Matsui H, Kohmoto O, Serizawa T, Nagai R, Takahashi T. Left ventricular relaxation abnormality is detectable by analysis of the relaxation time constant in patients with atrial fibrillation. Jpn Circ J 2001; 65:610-6. [PMID: 11450688 DOI: 10.1253/jcj.65.610] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Left ventricular (LV) contractility is constantly changing during atrial fibrillation (AF), which is dependent on the force-interval relationships. However, no information has been available on LV relaxation in patients with both AF and impaired LV systolic function. LV pressure was measured with a catheter-tipped micromanometer and the time constant of isovolumic LV pressure decline (tau(bf)) was calculated with best exponential fitting from more than 10 consecutive beats. Patients with AF (5 with mitral valvular disease, 6 with idiopathic dilated cardiomyopathy, and 1 with no underlying disease) were subdivided into 2 groups: group A, with ejection fraction (EF) <0.5 (n=7); and group B, with EF > or =0.5 (n=5). Linear correlation coefficients (r) between tau and RR2, RR2/RR1, LV peak systolic pressure (peak LVP) were calculated. Although tau did not show a discrepancy between the 2 groups, tau(bf) correlated better with RR2/RR1 only in the group A patients. The relation between tau and peak LVP showed a good correlation with a steep slope (R, Deltatau/Deltapeak LVP) only in the group A patients (accentuated afterload-dependence). R was significantly different between the 2 groups. Thus, a beat-to-beat analysis of tau may be a practical and feasible way for detecting LV relaxation abnormality in patients with AF.
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Affiliation(s)
- K Harada
- Department of Cardiovascular Medicine, University of Tokyo, Japan
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41
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Yao A. [Progress and problems in measuring the [Ca2+]i]. Clin Calcium 2001; 11:726-732. [PMID: 15775575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Since Ca(2+) has been recognized as an important intracellular second messenger for many signal transduction pathways, several methods to measure the intracellular Ca(2+) concentration ( [Ca(2+)](i) ) have been invented, including Ca(2+) microelectrodes, Ca(2+) sensitive dyes, and artificial Ca(2+) sensitive proteins. These techniques have been further evolving in combination with progression of computer technology, while true [Ca(2+)](i) is not still measurable.
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Affiliation(s)
- A Yao
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
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Abstract
Muscle LIM protein (MLP) may serve as a scaffold protein on the actin-based cytoskeleton, and mice deficient in this protein (MLPKO) have been recently reported to develop dilated cardiomyopathy. To determine the causes of depressed contractility in this model, we measured intracellular Ca2+ concentration ([Ca2+]i) transients (fluo 3), cell shortening, L-type Ca2+ channel current ( I Ca,L), Na/Ca exchanger current ( I Na/Ca), and sarcoplasmic reticulum (SR) Ca content in left ventricular MLPKO myocytes. I Ca,L-voltage relationships, I Na/Ca density, and membrane capacitance did not differ between wild-type (WT) and MLPKO myocytes. The peak systolic [Ca2+]i was significantly increased in MLPKO myocytes (603 ± 54 vs. 349 ± 18 nM in WT myocytes). The decline of [Ca2+]i transients was accelerated in MLPKO myocytes, and SR Ca2+ content was increased by 21%, indicating that SR Ca2+-ATPase function is normal or enhanced in MLPKO myocytes. Confocal imaging of actin filaments stained with tetramethylrhodamine isothiocyanate-labeled phalloidin showed disorganization of myofibrils and abnormal alignment of Z bands, and fractional shortening was significantly diminished in MLPKO myocytes compared with that in WT myocytes at comparable peak [Ca2+]i. Thus a reduced [Ca2+]-induced shortening may be involved in the pathogenesis of myocardial dysfunction in this genetic model of heart failure.
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Affiliation(s)
- Z Su
- Division of Cardiology, University of Utah Health Science Center, Salt Lake City, Utah 84132, USA
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43
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Takahashi T, Sugishita Y, Nojiri T, Shimizu T, Yao A, Kinugawa K, Harada K, Nagai R. Cloning of hypoxia-inducible factor 1alpha cDNA from chick embryonic ventricular myocytes. Biochem Biophys Res Commun 2001; 281:1057-62. [PMID: 11237772 DOI: 10.1006/bbrc.2001.4463] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hypoxia-inducible factor 1 (HIF-1) is composed of HIF-1alpha and arylhydrocarbon nuclear receptor translocator (ARNT), which belong to the basic-helix-loop-helix-Per/ARNT/Sim (bHLH-PAS) family of transcription factors. HIF plays key roles in oxygen homeostasis and embryonic cardiovascular development. In this study, we have cloned cDNAs encoding the chick HIF-1alpha from cultured embryonic ventricular myocytes (CEVM) and then examined its expression in various embryonic tissues. The deduced amino acid sequence of the chick HIF-1alpha cDNA showed 79% identity with that of the human HIF-1alpha cDNA. In contrast, sequence homology between the chick HIF-1alpha and endothelial PAS protein 1 (EPAS1), another member of the bHLH-PAS proteins, was only low (49%). HIF-1alpha mRNA was expressed abundantly in CEVM, but scarcely in the liver, which was quite different from expression pattern of EPAS1 mRNA. These data suggest that HIF-1alpha may be involved in embryonic cardiovascular development. HIF-1alpha and EPAS1 may play distinct roles during developmental stages.
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Affiliation(s)
- T Takahashi
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
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Venter JC, Adams MD, Myers EW, Li PW, Mural RJ, Sutton GG, Smith HO, Yandell M, Evans CA, Holt RA, Gocayne JD, Amanatides P, Ballew RM, Huson DH, Wortman JR, Zhang Q, Kodira CD, Zheng XH, Chen L, Skupski M, Subramanian G, Thomas PD, Zhang J, Gabor Miklos GL, Nelson C, Broder S, Clark AG, Nadeau J, McKusick VA, Zinder N, Levine AJ, Roberts RJ, Simon M, Slayman C, Hunkapiller M, Bolanos R, Delcher A, Dew I, Fasulo D, Flanigan M, Florea L, Halpern A, Hannenhalli S, Kravitz S, Levy S, Mobarry C, Reinert K, Remington K, Abu-Threideh J, Beasley E, Biddick K, Bonazzi V, Brandon R, Cargill M, Chandramouliswaran I, Charlab R, Chaturvedi K, Deng Z, Di Francesco V, Dunn P, Eilbeck K, Evangelista C, Gabrielian AE, Gan W, Ge W, Gong F, Gu Z, Guan P, Heiman TJ, Higgins ME, Ji RR, Ke Z, Ketchum KA, Lai Z, Lei Y, Li Z, Li J, Liang Y, Lin X, Lu F, Merkulov GV, Milshina N, Moore HM, Naik AK, Narayan VA, Neelam B, Nusskern D, Rusch DB, Salzberg S, Shao W, Shue B, Sun J, Wang Z, Wang A, Wang X, Wang J, Wei M, Wides R, Xiao C, Yan C, Yao A, Ye J, Zhan M, Zhang W, Zhang H, Zhao Q, Zheng L, Zhong F, Zhong W, Zhu S, Zhao S, Gilbert D, Baumhueter S, Spier G, Carter C, Cravchik A, Woodage T, Ali F, An H, Awe A, Baldwin D, Baden H, Barnstead M, Barrow I, Beeson K, Busam D, Carver A, Center A, Cheng ML, Curry L, Danaher S, Davenport L, Desilets R, Dietz S, Dodson K, Doup L, Ferriera S, Garg N, Gluecksmann A, Hart B, Haynes J, Haynes C, Heiner C, Hladun S, Hostin D, Houck J, Howland T, Ibegwam C, Johnson J, Kalush F, Kline L, Koduru S, Love A, Mann F, May D, McCawley S, McIntosh T, McMullen I, Moy M, Moy L, Murphy B, Nelson K, Pfannkoch C, Pratts E, Puri V, Qureshi H, Reardon M, Rodriguez R, Rogers YH, Romblad D, Ruhfel B, Scott R, Sitter C, Smallwood M, Stewart E, Strong R, Suh E, Thomas R, Tint NN, Tse S, Vech C, Wang G, Wetter J, Williams S, Williams M, Windsor S, Winn-Deen E, Wolfe K, Zaveri J, Zaveri K, Abril JF, Guigó R, Campbell MJ, Sjolander KV, Karlak B, Kejariwal A, Mi H, Lazareva B, Hatton T, Narechania A, Diemer K, Muruganujan A, Guo N, Sato S, Bafna V, Istrail S, Lippert R, Schwartz R, Walenz B, Yooseph S, Allen D, Basu A, Baxendale J, Blick L, Caminha M, Carnes-Stine J, Caulk P, Chiang YH, Coyne M, Dahlke C, Deslattes Mays A, Dombroski M, Donnelly M, Ely D, Esparham S, Fosler C, Gire H, Glanowski S, Glasser K, Glodek A, Gorokhov M, Graham K, Gropman B, Harris M, Heil J, Henderson S, Hoover J, Jennings D, Jordan C, Jordan J, Kasha J, Kagan L, Kraft C, Levitsky A, Lewis M, Liu X, Lopez J, Ma D, Majoros W, McDaniel J, Murphy S, Newman M, Nguyen T, Nguyen N, Nodell M, Pan S, Peck J, Peterson M, Rowe W, Sanders R, Scott J, Simpson M, Smith T, Sprague A, Stockwell T, Turner R, Venter E, Wang M, Wen M, Wu D, Wu M, Xia A, Zandieh A, Zhu X. The sequence of the human genome. Science 2001; 291:1304-51. [PMID: 11181995 DOI: 10.1126/science.1058040] [Citation(s) in RCA: 7678] [Impact Index Per Article: 333.8] [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: 12/13/2022]
Abstract
A 2.91-billion base pair (bp) consensus sequence of the euchromatic portion of the human genome was generated by the whole-genome shotgun sequencing method. The 14.8-billion bp DNA sequence was generated over 9 months from 27,271,853 high-quality sequence reads (5.11-fold coverage of the genome) from both ends of plasmid clones made from the DNA of five individuals. Two assembly strategies-a whole-genome assembly and a regional chromosome assembly-were used, each combining sequence data from Celera and the publicly funded genome effort. The public data were shredded into 550-bp segments to create a 2.9-fold coverage of those genome regions that had been sequenced, without including biases inherent in the cloning and assembly procedure used by the publicly funded group. This brought the effective coverage in the assemblies to eightfold, reducing the number and size of gaps in the final assembly over what would be obtained with 5.11-fold coverage. The two assembly strategies yielded very similar results that largely agree with independent mapping data. The assemblies effectively cover the euchromatic regions of the human chromosomes. More than 90% of the genome is in scaffold assemblies of 100,000 bp or more, and 25% of the genome is in scaffolds of 10 million bp or larger. Analysis of the genome sequence revealed 26,588 protein-encoding transcripts for which there was strong corroborating evidence and an additional approximately 12,000 computationally derived genes with mouse matches or other weak supporting evidence. Although gene-dense clusters are obvious, almost half the genes are dispersed in low G+C sequence separated by large tracts of apparently noncoding sequence. Only 1.1% of the genome is spanned by exons, whereas 24% is in introns, with 75% of the genome being intergenic DNA. Duplications of segmental blocks, ranging in size up to chromosomal lengths, are abundant throughout the genome and reveal a complex evolutionary history. Comparative genomic analysis indicates vertebrate expansions of genes associated with neuronal function, with tissue-specific developmental regulation, and with the hemostasis and immune systems. DNA sequence comparisons between the consensus sequence and publicly funded genome data provided locations of 2.1 million single-nucleotide polymorphisms (SNPs). A random pair of human haploid genomes differed at a rate of 1 bp per 1250 on average, but there was marked heterogeneity in the level of polymorphism across the genome. Less than 1% of all SNPs resulted in variation in proteins, but the task of determining which SNPs have functional consequences remains an open challenge.
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Affiliation(s)
- J C Venter
- Celera Genomics, 45 West Gude Drive, Rockville, MD 20850, USA.
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Wu W, Yao A, Wang DH. Quantitation of Angiotensin II Receptors by Competitive Reverse-Transcription Polymerase Chain Reaction. Methods Mol Med 2001; 51:195-204. [PMID: 21331716 DOI: 10.1385/1-59259-087-x:195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Becker-Andre and Hahlbrock first described competitive RT-PCR (1). In the competitive RT-PCR, a synthetic RNA/DNA control (competitor), generally called internal standard, is coamplified with the target nucleic acid in the same tube (2,3). Ideally, both target and internal standard will amplify with equivalent efficiency, and products will be distinguishable after amplification by their sizes. Thus, the internal standards that competitive RT-PCR requires should be very close in composition to the target sequences. Quantification is then performed by comparing the PCR signal of the target amplicon with the PCR signal obtained with known concentrations of the internal standard. Most competitive RT-PCR protocols use serial dilutions of competitor with a constant amount of unknown mRNA in the RT-PCR process (4). This procedure requires 4-8 reactions for each sample in order to plot the ratio of products against the amount of added competitor to determine the equimolar amount for each unknown sample. Calibration curves, relating the logarithm of the ratio of both PCR products to the logarithm of the initial amount of competitor, are then constructed. If both target and competitor amplify with equivalent efficiency, the amount of initial target mRNA can be obtained from the point on the curve where target and standard values are equal.
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Affiliation(s)
- W Wu
- Department of Medicine, College of Human Medicine, Michigan State University, East Lansing, MI
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Wakimoto K, Kobayashi K, Kuro-O M, Yao A, Iwamoto T, Yanaka N, Kita S, Nishida A, Azuma S, Toyoda Y, Omori K, Imahie H, Oka T, Kudoh S, Kohmoto O, Yazaki Y, Shigekawa M, Imai Y, Nabeshima Y, Komuro I. Targeted disruption of Na+/Ca2+ exchanger gene leads to cardiomyocyte apoptosis and defects in heartbeat. J Biol Chem 2000; 275:36991-8. [PMID: 10967099 DOI: 10.1074/jbc.m004035200] [Citation(s) in RCA: 160] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Ca(2+), which enters cardiac myocytes through voltage-dependent Ca(2+) channels during excitation, is extruded from myocytes primarily by the Na(+)/Ca(2+) exchanger (NCX1) during relaxation. The increase in intracellular Ca(2+) concentration in myocytes by digitalis treatment and after ischemia/reperfusion is also thought to result from the reverse mode of the Na(+)/Ca(2+) exchange mechanism. However, the precise roles of the NCX1 are still unclear because of the lack of its specific inhibitors. We generated Ncx1-deficient mice by gene targeting to determine the in vivo function of the exchanger. Homozygous Ncx1-deficient mice died between embryonic days 9 and 10. Their hearts did not beat, and cardiac myocytes showed apoptosis. No forward mode or reverse mode of the Na(+)/Ca(2+) exchange activity was detected in null mutant hearts. The Na(+)-dependent Ca(2+) exchange activity as well as protein content of NCX1 were decreased by approximately 50% in the heart, kidney, aorta, and smooth muscle cells of the heterozygous mice, and tension development of the aortic ring in Na(+)-free solution was markedly impaired in heterozygous mice. These findings suggest that NCX1 is required for heartbeats and survival of cardiac myocytes in embryos and plays critical roles in Na(+)-dependent Ca(2+) handling in the heart and aorta.
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Affiliation(s)
- K Wakimoto
- Advanced Medical Research Department and Discovery Research Laboratory, Tanabe Seiyaku Co. Ltd., 3-16-89 Kashima, Yodogawa-ku, Osaka 532-8505, Japan
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Yao A, Wang J, Fink LM, Hardin JW, Hauer-Jensen M. Molecular cloning and sequence analysis of the 5'-flanking region of the Sprague-Dawley rat thrombomodulin gene. DNA Seq 2000; 10:55-60. [PMID: 10565546 DOI: 10.3109/10425179909033937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The 5'-flanking region of the rat thrombomodulin gene was cloned by polymerase chain reaction (PCR) amplification of adaptor-ligated rat genomic DNA fragment libraries, using primers derived from the coding sequences of the thrombomodulin cDNA and adaptor primers. By sequence analysis putative regulatory elements in the promoter domain were shown to include a TATA box and several conserved binding sites for stimulatory protein 1 (SP1) and activator protein 2 (AP2). The transcription factor activator protein 1 (AP1) binding site located in the 5'-flanking region may serve as a negative gene regulatory site for tumor necrosis factor-alpha (TNF-alpha). A potential retinoic acid response element (RARE) and a possible cAMP response element are located in the putative promoter region, suggesting a role for retinoic acid and cAMP in the induction of thrombomodulin gene expression. The rat thrombomodulin gene promoter sequence shows 89% homology to that of mouse and 77% homology to that of human.
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Affiliation(s)
- A Yao
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock 72205, USA
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Sugishita Y, Takahashi T, Shimizu T, Yao A, Kinugawa K, Sugishita K, Harada K, Matsui H, Nagai R. Expression of genes encoding vascular endothelial growth factor and its Flk-1 receptor in the chick embryonic heart. J Mol Cell Cardiol 2000; 32:1039-51. [PMID: 10888256 DOI: 10.1006/jmcc.2000.1141] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular endothelial growth factor (VEGF) is known to play an essential role in embryonic vascular development. The heart is one of the main organs that produce VEGF, but it is still unknown how expression of VEGF gene is regulated in embryonic cardiac myocytes. Thus, we cloned cDNAs encoding VEGF and its receptor (a KDR/flk-1 or Quek1 homologue) from cultured 10-day-old chick embryonic ventricular myocytes (CEVM). Reverse transcription-polymerase chain reaction revealed that the chick VEGF mRNAs consisted of at least four different species corresponding to the isoforms of 190, 166, 146 and 122 amino acids. In the embryonic heart and CEVM, the isoforms of 166 and 122 amino acids were dominant. Northern blot analysis detected an abundance of VEGF mRNA in both the embryonic heart and CEVM, even at the basal state. The levels of VEGF mRNA in CEVM were significantly augmented by forskolin (100 microM), or phorbol 12-myristate, 13-acetate (200 nM) in a time-dependent manner in CEVM. In contrast, the basal levels of VEGF mRNA were attenuated by genistein (100 microM), but not by H89 (100 microM) or bisindolylmaleimide (75 microM). Northern blot analysis also detected the chick flk-1 mRNA in abundance in the embryonic heart, and to a much lesser extent in CEVM. The expression levels of VEGF and flk-1 mRNA species were continuously high in the 6, 8 and 10-day-old chick embryonic hearts. In the 10-day-old embryonic hearts, in situ hybridization confirmed that mRNA encoding VEGF was mainly expressed in ventricular myocytes. In contrast, the flk-1 mRNA was detected in the microvascular endothelial cells, and to a lesser extent in the ventricular myocytes. These data suggest that VEGF is produced in embryonic ventricular myocytes, even at the basal state, and that the levels of VEGF mRNA may be differently regulated by various protein kinases. VEGF produced by the chick embryonic heart may play important roles in embryonic cardiovascular development by acting on surrounding endothelial cells and, possibly, on ventricular myocytes themselves.
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Affiliation(s)
- Y Sugishita
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, Japan
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Sugishita Y, Shimizu T, Yao A, Kinugawa KI, Nojiri T, Harada K, Matsui H, Nagai R, Takahashi T. Lipopolysaccharide augments expression and secretion of vascular endothelial growth factor in rat ventricular myocytes. Biochem Biophys Res Commun 2000; 268:657-62. [PMID: 10679260 DOI: 10.1006/bbrc.2000.2165] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular endothelial growth factor (VEGF), also known as vascular permeability factor, is highly expressed in the myocardium under various stimuli including hypoxia and ischemia. On the other hand, lipopolysaccharide (LPS) causes systemic inflammatory response syndrome (SIRS), which consists of systemic pathophysiological changes related to vascular hyperpermeability. To test the hypothesis that VEGF is one of the important mediators of SIRS, we examined effects of LPS on the VEGF expression and secretion in cultured neonatal rat ventricular myocytes. LPS (10 microg/ml) rapidly (within 1 h) augmented the levels of VEGF mRNA in these cells. Pharmacological inhibition of nucleic factor-kappaB or tyrosine kinases did not affect the LPS-induced augmentation of VEGF mRNA expression, while these treatments markedly suppressed the up-regulation of inducible nitric oxide synthase (iNOS) expression by LPS. The VEGF concentrations in the conditioned media were also significantly increased by the LPS treatment of 6 h. In conclusion, LPS augments VEGF expression and secretion in rat ventricular myocytes, suggesting that VEGF may be involved in pathogenesis of SIRS. LPS may induce VEGF mRNA through the signaling pathways that are distinct from those responsible for the iNOS induction.
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Affiliation(s)
- Y Sugishita
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Carsuzaa F, Yao A, Morand J, Guennoc B, Carli P. Un oublié de la pathologie thyroïdienne: le syndrome de Diamond. Rev Med Interne 1999. [DOI: 10.1016/s0248-8663(99)80391-9] [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: 11/29/2022]
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