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Comparative analysis of current diagnostic PCR assays in detecting pathogenic Leptospira isolates from environmental samples

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Asian Pacific Journal of Tropical Medicine 2019年第10期12卷 472-478页

作者： May-Ling Yap Zamberi Sekawi Hui-Yee Chee han kiat alan ong Vasantha Kumari Neela Department of Medical Microbiology and Parasitology Faculty of Medicine and Health SciencesUniversiti Putra Malaysia43400 SerdangSelangorMalaysia Department of Pre-Clinical Sciences Faculty of Medicine and Health SciencesUniversiti Tunku Abdul RahmanBandar Sungai Long43000 KajangSelangorMalaysia

Objective:To compare the efficiency of routine diagnostic PCR assays in detecting pathogenic Leptospira isolated from water and ***:Seven routine assays targeting six genes(lip L32,fla B,gyr B,lfb1,sec Y and lig B)were evaluated and compared on the cultures of two groups of pathogenic Leptospira from different *** group included 19 described reference strains recovered from infected human or animals,and another group included 22 environmental isolates from recreational and residential sites in *** latter have been confirmed for presence of pathogenic Leptospira *** positivity or detection sensitivity of each assay was determined and compared between the two ***:Validation on reference strains showed 100.0%PCR sensitivity for all assays except lig B-PCR(95.0%)that failed to amplify Leptospira interrogans serovar *** marked contrast,there was a notable decline in sensitivity in the environmental isolates(lip L32-PCR,95.5%;fla B-PCR,90.9%;gyr B-PCR,77.3%;lfb1-PCR,59.1%;sec Y-PCRs,40.9%G1/G2-PCR,36.4%;lig B-PCR,13.6%),implying a large genetic distance between the two groups,as well as nucleotide polymorphism among environmental ***:High proportion of false-negative PCR results suggests a need of prudent selection of primers in detecting environmental pathogenic *** findings offer valuable insights on the extensive biodiversity of genus Leptospira and its impact on the efficacy and development of molecular detection tool.

关键词： Leptospira Pathogenic species Environmental samples PCR Sensitivity

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High-resolution computed tomography in patients with atypical 'cardiac' chest pain: a study investigating patients at 10-year cardiovascular risks defined by the Framingham and PROCAM scores

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Journal of Geriatric Cardiology 2006年第1期3卷 17-21页

作者： Choon kiat ANG alan Yean Yip Fong Sze Piaw CHIN Tiong Kiam ong Seyfarth M Tobias Chee Khoon LIEW Rapaee ANNUAR Houng Bang LIEW Kui Hian SIM Deptartment of Cardiology Sarawak General Hospital Sarawak Malaysia Siemens Medical Solutions Germany Deptartment of Cardiology Sarawak General Hospital SarawakMalaysia University Malaysia Sarawak Malaysia

Background and objective Atypical 'cardiac' chest pain (ACCP) is not usually caused by myocardial ischaemia. Current noninvasive investigations for these symptoms are not yet as accurate as invasive coronary angiography. The latest 64-row multi-detector computed tomography (MDCT) technology is non-invasive, has high specificity and negative predictive values for the detection of significant coronary disease. Our aim was to investigate if this modality can provide more information in the assessment of outpatients with ACCP in addition to established cardiovascular risk scores. Methods Seventy consecutive patients presenting to the outpatient clinic with ACCP underwent 64-row MDCT scan of the coronary arteries. They were categorized into low, medium or high risk groups based upon the Framingham and PROCAM scores. We defined a clinically abnormal MDCT scan as coronary stenosis =50% or calcium score ＞400 Agatston. Results Fifty-three (75.7%) patients did not have clinically abnormal scans. Framingham score classified 43 patients as low-risk while PROCAM classified 59 patients as low-risk. MDCT scans were abnormal for 18.6% and 22.0% of the respective low-risk group of patients. For patients with medium-to-high risk, 33.3% and 36.4% of Framingham and PROCAM patient groups respectively had abnormal MDCT scans. Conclusion MDCT adds valuable information in the assessment of patients with ACCP by identifying a significant proportion of patients categorized as low-risk to have underlying significant coronary stenosis and coronary calcification by established cardiovascular risk scores.

关键词： multi-detector computed tomography atypical 'cardiac' chest pain coronary artery disease risk stratification

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Dynamic phenotypic heterogeneity and the evolution of multiple RNA subtypes in hepatocellular carcinoma:the PLANET study

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National Science Review 2022年第3期9卷 96-109页

作者： Weiwei Zhai hannah Lai Neslihan Arife Kaya Jianbin Chen Hechuan Yang Bingxin Lu Jia Qi Lim Siming Ma Sin Chi Chew Khi Pin Chua Jacob Josiah Santiago Alvarez Pauline Jieqi Chen Mei Mei Chang Lingyan Wu Brian K.P.Goh Alexander Yaw-Fui Chung Chung Yip Chan Peng Chung Cheow Ser Yee Lee Juinn Huar Kam Alfred Wei-Chieh Kow Iyer Shridhar Ganpathi Rawisak Chanwat Jidapa Thammasiri Boon Koon Yoong Diana Bee-Lan ong Vanessa H.de Villa Rouchelle D.Dela Cruz Tracy Jiezhen Loh Wei Keat Wan Zeng Zeng Anders Jacobsen Skanderup Yin Huei Pang Krishnakumar Madhavan Tony kiat-Hon Lim Glenn Bonney Wei Qiang Leow Valerie Chew Yock Young Dan Wai Leong Tam han Chong Toh Roger Sik-Yin Foo Pierce Kah-Hoe Chow Genome Institute of Singapore Agency for Science Technology and Research Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences School of Biological Sciences Nanyang Technological University Division of Biosciences Faculty of Life Sciences Division of Surgery and Surgical Oncology National Cancer Centre Department of Hepato-Pancreato-Biliary and Transplant Surgery Singapore General Hospital Division of Hepatobiliary and Pancreatic Surgery Department of Surgery University Surgical Cluster National University Health System Hepato-Pancreato-Biliary Surgery Unit Department of Surgery National Cancer Institute Division of Pathology National Cancer Institute Department of Surgery Faculty of Medicine University of Malaya Department of Surgery and Center for Liver Disease Management and Transplantation The Medical City 13. Department of Laboratories The Medical City Department of Pathology Singapore General Hospital Institute for Infocomm Research ASTAR Department of Pathology National University Health System Translational Immunology Institute (TII) Sing Health Duke-NUS Academic Medical Centre Division of Gastroenterology and Hepatology University Medicine Cluster National University Hospital Department of Biochemistry Yong Loo Lin School of Medicine National University of Singapore Cancer Science Institute of Singapore National University of Singapore Division of Medical Oncology National Cancer Center Singapore Cardiovascular Research Institute National University of Singapore National University Healthcare System Singhealth-Duke-NUS Academic Surgery Program Duke-NUS Graduate Medical School Institute of Molecular and Cell Biology Agency for Science Technology and Research

Intra-tumor heterogeneity(ITH) is a key challenge in cancer treatment, but previous studies have focused mainly on the genomic alterations without exploring phenotypic(transcriptomic and immune)heterogeneity. Using one of the largest prospective surgical cohorts for hepatocellular carcinoma(HCC)with multi-region sampling, we sequenced whole genomes and paired transcriptomes from 67 HCC patients(331 samples). We found that while genomic ITH was rather constant across stages, phenotypic ITH had a very different trajectory and quickly diversified in stage Ⅱ patients. Most strikingly, 30% of patients were found to contain more than one transcriptomic subtype within a single tumor. Such phenotypic ITH was found to be much more informative in predicting patient survival than genomic ITH and explains the poor efficacy of single-target systemic therapies in HCC. Taken together, we not only revealed an unprecedentedly dynamic landscape of phenotypic heterogeneity in HCC, but also highlighted the importance of studying phenotypic evolution across cancer types.

关键词： hepatocellular carcinoma intra-tumor heterogeneity phenotypic evolution tumor evolution

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2021亚太心脏病学会P2Y12受体拮抗剂应用于亚太特殊人群的共识

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中华心血管病杂志 2023年第1期51卷 19-31页

作者： Jack Wei Chieh Tan Derek P Chew Kin Lam Tsui Doreen Tan Dmitry Duplyakov Ayman Hammoudeh 张波李毅徐凯 Paul J ong DoniFirman Habib Gamra Wael Almahmeed Jamshed Dalal Lihua Tan Gabriel Steg Quang N Nguyen Junya Ako Jassim Al Suwaidi Mark Chan Mohamed Sobhy Abdulla Shehab Wacin Buddhari 王祖禄 alan Yean Yip Fong Bilgehan Karadag Byeong-Keuk Kim Usman Baber Chee Tang Chin 韩雅玲新加坡国立心脏中心新加坡盛港综合医院澳大利亚弗林德斯大学医学与公共卫生学院香港特别行政区东区尤德夫人那打素医院新加坡国立大学理学院药学系俄罗斯萨马拉地区心脏病医院约旦安曼Istishari医院心脏病科大连医科大学第一附属医院心内科大连116000 北部战区总医院心内科沈阳110840 新加坡伊丽莎白诺维娜医院新加坡陈笃生医院印度尼西亚Harapan Kita国家心血管中心、印度尼西亚大学医学院心脏病学和血管医学系突尼斯Fattouma Bourguiba大学医院/莫纳斯提尔大学心脏病科阿拉伯联合酋长国阿布扎比克利夫兰诊所印度孟买Kokilaben Dhirubhai Ambani医院心脏中心香港特别行政区广华医院法国巴黎比夏医院心脏病科越南河内医科大学心脏病科日本神奈川县相模原市北里大学医学院心血管内科卡塔尔多哈哈马德医疗公司成人心脏病科新加坡国立大学心脏中心埃及亚历山大大学医学院阿拉伯联合酋长国阿联酋大学医学与健康科学学院泰国曼谷朱拉隆功国王纪念医院马来西亚砂拉越哥打三马拉汉心脏中心土耳其伊斯坦布尔大学-Cerrahpasa医学院韩国首尔延世大学医学院Severance心血管医院心脏病科美国俄克拉荷马大学健康科学中心

高龄、糖尿病(DM)和慢性肾脏疾病(CKD)不仅会增加慢性冠状动脉综合征(CCS)患者缺血事件的风险,还会增加其接受抗血小板治疗期间的出血风险。此类特殊人群可能需要调整治疗方案,尤其是亚洲的特殊人群,往往表现出与西方人群不同的临床特... 详细信息

高龄、糖尿病(DM)和慢性肾脏疾病(CKD)不仅会增加慢性冠状动脉综合征(CCS)患者缺血事件的风险,还会增加其接受抗血小板治疗期间的出血风险。此类特殊人群可能需要调整治疗方案,尤其是亚洲的特殊人群,往往表现出与西方人群不同的临床特征。关于亚洲人群CCS高风险的分类和急性冠状动脉综合征(ACS)后使用新一代强效P2Y12受体抑制剂(如替格瑞洛和普拉格雷)的国际指南已相继发表。本共识总结了在特殊人群中使用强效P2Y12受体抑制剂的相关证据,提出了在冠状动脉疾病(CAD)特殊人群中应用标准疗程双联抗血小板治疗(DAPT)、短期DAPT和单一抗血小板治疗的推荐意见。本共识的特殊人群包括从ACS过渡至CCS,老年,或患有CKD、DM、多血管CAD和治疗期间发生出血并发症等特征的患者。

关键词：血小板聚集抑制剂亚洲心肌缺血共识双联抗血小板治疗

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