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Liang C, Liang ZC, Liu H, Bai L, Zhao J, Tang S, Chen XY, Hu ZJ, Wang L, Zheng SJ. [A case report on the diagnosis and treatment of chronic hepatitis E after kidney transplantation]. Zhonghua Gan Zang Bing Za Zhi 2024; 32:72-75. [PMID: 38320794 DOI: 10.3760/cma.j.cn501113-20231116-00196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Affiliation(s)
- C Liang
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China Beijing Municipal Key Laboratory of Liver Failure and Artificial Liver Treatment Research, Beijing 100069, China
| | - Z C Liang
- Department of Microbiology, Peking University Health Science Center, Beijing 100191, China
| | - H Liu
- Department of Pathology, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China
| | - L Bai
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China Beijing Municipal Key Laboratory of Liver Failure and Artificial Liver Treatment Research, Beijing 100069, China
| | - J Zhao
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China
| | - S Tang
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China Beijing Municipal Key Laboratory of Liver Failure and Artificial Liver Treatment Research, Beijing 100069, China
| | - X Y Chen
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China
| | - Z J Hu
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China
| | - L Wang
- Department of Microbiology, Peking University Health Science Center, Beijing 100191, China
| | - S J Zheng
- Liver Disease Center, Beijing YouAn Hospital, Capital Medical University, Beijing 100069, China
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2
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Dong SB, Wang XL, Huo D, Li RQ, Yang Y, Liang ZC, Wang QY, Jia L. [Epidemiological characteristics of hand, foot and mouth disease among people aged 6 and over in Beijing, 2011-2020]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:207-212. [PMID: 35184486 DOI: 10.3760/cma.j.cn112338-20210511-00387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To analyze the epidemiological characteristics of hand, foot and mouth disease (HFMD) among people ≥6 years old in Beijing from 2011 to 2020. Methods: The incidence data of HFMD cases from 2011 to 2020 were collected from the National Notifiable Infectious Disease Reporting System of China Information for Disease Control and Prevention and the etiological surveillance of HFMD in 29 sentinel hospitals from 16 districts of Beijing. Descriptive epidemiological methods were used to analyze the distributions, pathogen constituents, and changes of HFMD cases in Beijing people ≥6 years old. Results: From 2011 to 2020, a total of 38 183 cases of HFMD were reported among people ≥6 years old in Beijing, of which 46 (0.12%) cases were severe. The average annual reported incidence was 19.04/100 000. The ratio of males to females were 1.37∶1(22 064∶16 119). The proportion of HFMD in people ≥6 years old increased from 7.56%(2 606/34 488) in 2011 to 24.54% (546/2 225) in 2020. The average incidence of HFMD was higher in Shunyi district, Yanqing district, and Tongzhou district than in other districts in Beijing. The positive rate of enterovirus in sentinel surveillance was 66.78% (1 976/2 959), the proportion of enterovirus group A 71 (EV-A71) was 45.29% (101/223) in 2014, no EV-A71 positive was detected in 2020, and the proportion of Coxsackievirus A 6 (CV-A6) increased from 15.11% (34/225) in 2016 to 81.08% (60/74) in 2020. Conclusions: From 2011 to 2020, the proportion of cases with HFMD in people ≥6 years old in Beijing increased yearly, and the proportion of EV-A71 positive patients decreased basically. Since 2016, CV-A6 has gradually become the dominant pathogen. More attention should be paid to the epidemic situation and dynamic pathogen changes of hand foot mouth disease in people ≥6 years old.
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Affiliation(s)
- S B Dong
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - X L Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - D Huo
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - R Q Li
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - Y Yang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - Z C Liang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - Q Y Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - L Jia
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine, Beijing 100013, China
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3
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Ng JJ, Liang ZC, Choong AMTL. The incidence of pulmonary thromboembolism in COVID-19 patients admitted to the intensive care unit: a meta-analysis and meta-regression of observational studies. J Intensive Care 2021; 9:20. [PMID: 33618760 PMCID: PMC7897892 DOI: 10.1186/s40560-021-00535-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 02/03/2021] [Indexed: 12/23/2022] Open
Abstract
Objectives Coronavirus disease 2019 (COVID-19) infection is associated with a prothrombotic state. We performed a meta-analysis of proportions to estimate the weighted average incidence of pulmonary thromboembolism (PTE) in COVID-19 patients who were admitted to the intensive care unit (ICU). Methods We searched various medical databases for relevant studies from 31 December 2019 till 30 September 2020. We included observational studies that reported the incidence of PTE in COVID-19 patients admitted to the ICU. We extracted data related to study characteristics, patient demographics, and the incidence of PTE. Risk of bias was assessed by using the ROBINS-I tool. Statistical analysis was performed with R 3.6.3. Results We included 14 studies with a total of 1182 patients in this study. Almost all patients in this meta-analysis received at least prophylactic anticoagulation. The weighted average incidence of PTE was 11.1% (95% CI 7.7% to 15.7%, I2 = 78%, Cochran’s Q test P < 0.01). We performed univariate and multivariate meta-regression, which identified the proportion of males as a significant source of heterogeneity (P = 0.03, 95% CI 0.00 to − 0.09) Conclusion The weighted average incidence of PTE remains high even after prophylactic anticoagulation. PTE is a significant complication of COVID-19 especially in critically ill patients in the ICU. Supplementary Information The online version contains supplementary material available at 10.1186/s40560-021-00535-x.
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Affiliation(s)
- Jun Jie Ng
- Division of Vascular and Endovascular Surgery, Department of Cardiac, Thoracic and Vascular Surgery, National University Heart Centre, Level 9, NUHS Tower Block, 1E Kent Ridge Road, Singapore, 119228, Singapore. .,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,SingVaSC, Singapore Vascular Surgical Collaborative, Singapore, Singapore.
| | - Zhen Chang Liang
- Department of Orthopaedic Surgery, National University Hospital, Singapore, Singapore
| | - Andrew M T L Choong
- Division of Vascular and Endovascular Surgery, Department of Cardiac, Thoracic and Vascular Surgery, National University Heart Centre, Level 9, NUHS Tower Block, 1E Kent Ridge Road, Singapore, 119228, Singapore.,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,SingVaSC, Singapore Vascular Surgical Collaborative, Singapore, Singapore
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Liang ZC, Chong MSY, Liu GKP, Valle AGD, Wang D, Lyu X, Chang CH, Cho TJ, Haas SB, Fisher D, Murphy D, Hui JHP. COVID-19 and Elective Surgery: 7 Practical Tips for a Safe, Successful, and Sustainable Reboot. Ann Surg 2021; 273:e39-e40. [PMID: 32433295 PMCID: PMC7268862 DOI: 10.1097/sla.0000000000004091] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zhen Chang Liang
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Mark Seng Ye Chong
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Gabriel Ka Po Liu
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | | | - Dahui Wang
- National Children's Medical Center & Children's Hospital of Fudan University, Shanghai, People's Republic of China
| | - Xuemin Lyu
- Department of Orthopaedic Surgery, Beijing Jishuitan Hospital, Xicheng, People's Republic of China
| | - Chih-Hung Chang
- Department of Orthopaedic Surgery, Far Eastern Memorial Hospital, New Taipei City, Taiwan; Graduate School of Biotechnology and Bioengineering, Yuan Ze University, Taoyuan, Taiwan
- Division of Infectious Disease, National University Hospital, Singapore
| | - Tae-Joon Cho
- Division of Paediatric Orthopaedics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea
| | | | - Dale Fisher
- Division of Infectious Disease, National University Hospital, Singapore
- Division of Paediatric Orthopaedics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea
| | - Diarmuid Murphy
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - James Hoi Po Hui
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
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Liang ZC, Yang C, Ding X, Hedrick JL, Wang W, Yang YY. Carboxylic acid-functionalized polycarbonates as bone cement additives for enhanced and sustained release of antibiotics. J Control Release 2021; 329:871-881. [DOI: 10.1016/j.jconrel.2020.10.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/01/2020] [Accepted: 10/09/2020] [Indexed: 01/22/2023]
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Li J, Yang Y, Liang ZC, Gao ZY, Jia L, Liu BW, Chen LJ, Wang QY. [Analysis of pathogenic composition and clinical characteristics of viral acute gastroenteritis in children under five years old in Beijing]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:1104-1110. [PMID: 33115197 DOI: 10.3760/cma.j.cn112150-20191129-00892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the epidemiological characteristics and clinical features of rotavirus-, norovirus-, adenovirus-and astrovirus-associ ated acute gastroenteritis in children under 5 years old in Beijing from Octorber, 2015 to March, 2017. Methods: In the intestinal clinic of 6 hospitals in 6 districts of Beijing, information and stool samples of the first 30 patients with acute gastroenteritis who are under the age of 5 years are collected monthly.Rotavirus, norovirus, adenovirus and astrovirus are identified by PCR.Descriptive epidemiological method was used to describe the epidemiological characteristics of diarrhea caused by rotavirus, norovirus, adenovirus and astrovirus in Beijing. One-way analysis of variance was used to analyze the Vesikari clinical severity score of of acute gastroenteritis caused by each virus. Unconditional logistic regression analysis was used to analysis the associated factors of clinical features. Results: Of the 2 052 samples, 709 (34.6%) were non-mixed infections: the positive rate of rotavirus, norovirus, adenovirus and astrovirus were 20.0%, 7.5%, 4.2% and 2.9%, respectively. A total of 135 cases (6.6%) were mixed infection. The mean and standard deviation of Vesikari clinical severity score was 8.0±3.1 for rotavirus associated acute gastroenteritis, which was significantly higher than norovirus (6.4±2.4, P<0.001), adenovirus (6.2±2.1, P<0.001) and astrovirus (6.1±2.0, P<0.001). The comparison of clinical features showed that compared with astrovirus, the children under 5 years old infected with rotavirus were more likely to have a diarrhea ≥5 days (OR=3.334), have vomiting ≥3 times within one day (OR=8.788), have vomiting≥1 day (OR=3.963), have a Vesikari clinical severity score ≥11 severe cases (OR=13.194). Norovirus infected cases were prone to have vomiting≥3 times in 1 day (OR=5.710).Adenovirus infected cases were prone to have a diarrhea≥5 days (OR=2.616). When using rotavirus as a reference, children under 5 years of age were less likely to develop fever≥38.4 ℃ after infection with norovirus (OR=0.397) or adenovirus (OR=0.280). Conclusions: The results of this study showed that the characteristics of acute gastroenteritis caused by different viruses are different. The clinical symptoms caused by rotavirus are more serious. Children under 24 months of age are at high risk of rotavirus infection. Effective preventive measures such as vaccination should be taken as soon as possible.
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Affiliation(s)
- J Li
- Institute for HIV/AIDS and STD Prevention and Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - Y Yang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - Z C Liang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - Z Y Gao
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - L Jia
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - B W Liu
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - L J Chen
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
| | - Q Y Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Research Center for Preventive Medicine of Beijing, Beijing 100013, China
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Ding X, Yang C, Moreira W, Yuan P, Periaswamy B, de Sessions PF, Zhao H, Tan J, Lee A, Ong KX, Park N, Liang ZC, Hedrick JL, Yang YY. A Macromolecule Reversing Antibiotic Resistance Phenotype and Repurposing Drugs as Potent Antibiotics. Adv Sci (Weinh) 2020; 7:2001374. [PMID: 32995131 PMCID: PMC7503100 DOI: 10.1002/advs.202001374] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/13/2020] [Indexed: 05/22/2023]
Abstract
In order to mitigate antibiotic resistance, a new strategy to increase antibiotic potency and reverse drug resistance is needed. Herein, the translocation mechanism of an antimicrobial guanidinium-functionalized polycarbonate is leveraged in combination with traditional antibiotics to afford a potent treatment for drug-resistant bacteria. Particularly, this polymer-antibiotic combination approach reverses rifampicin resistance phenotype in Acinetobacter baumannii demonstrating a 2.5 × 105-fold reduction in minimum inhibitory concentration (MIC) and a 4096-fold reduction in minimum bactericidal concentration (MBC). This approach also enables the repurposing of auranofin as an antibiotic against multidrug-resistant (MDR) Gram-negative bacteria with a 512-fold MIC and 128-fold MBC reduction, respectively. Finally, the in vivo efficacy of polymer-rifampicin combination is demonstrated in a MDR bacteremia mouse model. This combination approach lays foundational ground rules for a new class of antibiotic adjuvants capable of reversing drug resistance phenotype and repurposing drugs against MDR Gram-negative bacteria.
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Affiliation(s)
- Xin Ding
- School of Pharmaceutical Sciences (Shenzhen)Sun Yat‐sen UniversityShenzhen518107China
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | - Chuan Yang
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | - Wilfried Moreira
- Singapore‐MIT Alliance for Research and Technology (SMART)1 CREATE WaySingapore138602Singapore
| | - Peiyan Yuan
- School of Pharmaceutical Sciences (Shenzhen)Sun Yat‐sen UniversityShenzhen518107China
| | - Balamurugan Periaswamy
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | | | - Huimin Zhao
- School of Pharmaceutical Sciences (Shenzhen)Sun Yat‐sen UniversityShenzhen518107China
| | - Jeremy Tan
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | - Ashlynn Lee
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | - Kai Xun Ong
- Singapore‐MIT Alliance for Research and Technology (SMART)1 CREATE WaySingapore138602Singapore
| | - Nathaniel Park
- IBM Almaden Research Center650 Harry RoadSan JoseCA95120USA
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
| | | | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology31 Biopolis Way, The NanosSingapore138669Singapore
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Das De S, Liang ZC, Cheah AEJ, Puhaindran ME, Lee EY, Lim AYT, Chong AKS. Emergency Hand and Reconstructive Microsurgery in the COVID-19-Positive Patient. J Hand Surg Am 2020; 45:869-875. [PMID: 32888437 PMCID: PMC7388858 DOI: 10.1016/j.jhsa.2020.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/25/2020] [Accepted: 07/27/2020] [Indexed: 02/02/2023]
Abstract
The case spectrum in hand surgery is one of extremes-purely elective day surgery cases under local anesthesia to mangling limb injuries that require immediate, and frequently, lengthy, surgery. Despite the cancellation of most elective orthopedic and plastic surgical procedures, hand surgeons around the world continue to see a steady stream of limb-threatening cases such as severe trauma and infections that require emergent surgical care. With the increase in community-spread, an increasing number of COVID-19-infected patients may be asymptomatic or have mild, nonspecific or atypical symptoms. Some of them may already have an ongoing, severe infection. The time-sensitive nature of some of these cases means that hand surgeons may need to operate urgently on patients who may be suspected of COVID-19 infections, often before confirmatory test results are available. General guidelines for perioperative care of the COVID-19-positive patient have been published. However, our practices differ from those of general orthopedic and plastic surgery, primarily because of the focus on trauma. This article discusses the perioperative and technical considerations that are essential to manage the COVID-19 patient requiring emergency care, without compromising clinical outcomes and while ensuring the safety of the attending staff.
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Affiliation(s)
- Soumen Das De
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore,Corresponding author: Soumen Das De, MBBs, MPH, National University Health System, 1E Kent Ridge Rd., Singapore 119228
| | - Zhen Chang Liang
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Andre Eu-Jin Cheah
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Mark Edward Puhaindran
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Ellen Yutan Lee
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Aymeric Yu Tang Lim
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
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Abstract
The ongoing coronavirus disease 2019 (COVID-19) crisis has hit Singapore hard. As of February 25, 2020, Singapore had the fourth highest number of confirmed COVID-19 infections outside of China, only trailing behind South Korea, Italy, and Japan. This has had reverberating effects on Singapore's health care system, and has, consequently, also affected medical education all the way from the undergraduate to the postgraduate level. While efforts are underway to contain disease spread and transmission, the authors believe that this is an opportune time to examine and reflect on the impact that medical crises like COVID-19 can have on medical training and education and to evaluate "business continuity plans" to ensure quality medical education even in the face of constant disruptions from pandemic outbreaks. Medical training is as important a mandate as patient care and service. The authors believe that even in trying times like this, rich and precious lessons can be sought and taught, which will immensely benefit medical students and residents-the health care leaders of tomorrow. In this Perspective, the authors discuss the various ways in which the COVID-19 crisis has affected medical instruction in Singapore and explore pertinent practical and creative solutions for the continuity of medical training in these trying times, drawing on their previous experience with the Severe Acute Respiratory Syndrome outbreak in 2003 as well as the current ongoing COVID-19 crisis.
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Affiliation(s)
- Zhen Chang Liang
- W. Wang is senior consultant and associate professor, Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; ORCID: http://orcid.org/0000-0003-3803-9392
| | - Shirley Beng Suat Ooi
- Z.C. Liang is a resident, Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; ORCID: http://orcid.org/0000-0001-7046-8918
| | - Wilson Wang
- S.B.S. Ooi is senior consultant, Emergency Medicine Department, National University Hospital, National University Health System, associate professor, Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, and designated institutional official, National University Health System Residency Programme, Singapore; ORCID: http://orcid.org/0000-0002-8661-7225
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Liang ZC, Chong MSY, Tan SS, Chin BZ, Murphy D, Hui JHP. Letter to the Editor: Does an Antimicrobial Incision Drape Prevent Intraoperative Contamination? A Randomized Controlled Trial of 1187 Patients. Clin Orthop Relat Res 2020; 478:1950-1952. [PMID: 32732583 PMCID: PMC7371093 DOI: 10.1097/corr.0000000000001331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 05/08/2020] [Indexed: 01/31/2023]
Affiliation(s)
- Zhen Chang Liang
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Mark Seng Ye Chong
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Sara Shuhui Tan
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Brian Zhaojie Chin
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Diarmuid Murphy
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
| | - James Hoi Po Hui
- Z. C. Liang, M. S. Y. Chong, S. S. Tan, B. Z. Chin, D. Murphy, J. H. P. Hui, National University of Singapore, Department of Orthopaedic Surgery, National University Health System, Singapore
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Liang ZC, Chong MSY, Sim MA, Lim JL, Castañeda P, Green DW, Fisher D, Ti LK, Murphy D, Hui JHP. Surgical Considerations in Patients with COVID-19: What Orthopaedic Surgeons Should Know. J Bone Joint Surg Am 2020; 102:e50. [PMID: 32341309 PMCID: PMC7219827 DOI: 10.2106/jbjs.20.00513] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Zhen Chang Liang
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Mark Seng Ye Chong
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Ming Ann Sim
- Department of Anesthesia, National University of Singapore, National University Health System, Singapore
| | - Joel Louis Lim
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Pablo Castañeda
- Department of Pediatric Orthopaedic Surgery, NYU Langone Medical Center, New York, NY
| | - Daniel W. Green
- Division of Pediatric Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Dale Fisher
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Division of Infectious Disease, National University Hospital, Singapore
| | - Lian Kah Ti
- Department of Anesthesia, National University of Singapore, National University Health System, Singapore
| | - Diarmuid Murphy
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - James Hoi Po Hui
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
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12
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Affiliation(s)
- Zhen Chang Liang
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Wilson Wang
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - Diarmuid Murphy
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
| | - James Hoi Po Hui
- Department of Orthopaedic Surgery, National University of Singapore, National University Health System, Singapore
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Tan SS, Yeo XY, Liang ZC, Sethi SK, Tay SSW. Stromal vascular fraction promotes fibroblast migration and cellular viability in a hyperglycemic microenvironment through up-regulation of wound healing cytokines. Exp Mol Pathol 2018; 104:250-255. [PMID: 29621477 DOI: 10.1016/j.yexmp.2018.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 03/26/2018] [Accepted: 03/31/2018] [Indexed: 11/27/2022]
Abstract
Diabetic wounds have impaired healing and a propensity for further morbidity, which may result in amputations. Stromal vascular fraction (SVF) is an autologous source of heterogeneous cell population obtained from adipose tissue, which is rich in stem cells and presents little immunogenicity to the host. In this study, we hypothesized that murine fibroblasts subjected to hyperglycemic conditions co-treated with SVF exhibit greater functional activity through the colorimetric MTT assay and a cell-monolayer in-vitro scratch assay. We sought to establish the underlying mechanism of action via the utility of an ELISA chemiluminescence array on the supernatant medium of the cells. Our results demonstrate that the mean percentage gap closure at 24 h in the hyperglycemia + SVF group was significantly greater at 41.1% ± 1.6% compared to the hyperglycemia alone group 16.6% ± 1.5% (post-hoc Bonferroni test p < 0.001, n = 3) although there was no difference between the SVF and normoglycemia group. Further, this SVF group exhibited a significantly greater 2.4 fold increase in fibroblastic cell viability as compared to the hyperglycemia alone group (p = 0.001, n = 3). The supernatant medium of the cells upon testing with ELISA indicated that early phase wound healing cytokines including platelet-derived growth factor (p = 0.012, n = 3), interleukin-1 (p = 0.003, n = 3), basic fibroblast growth factor (p = 0.003, n = 3) and interleukin-10 (p = 0.009, n = 3) were expressed in significantly greater relative luminescent units in SVF as compared to hyperglycemia alone groups (Student t-test). Taken together and for the first time, our study shows that SVF is a promising therapeutic agent for up-regulating fibroblastic activity in a hyperglycemic microenvironment, and this result can be explained in part by the stimulation of wound-healing cytokines.
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Affiliation(s)
- Shaun S Tan
- Department of Laboratory Medicine, National University Hospital, Singapore; Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Xin Yi Yeo
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zhen Chang Liang
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sunil K Sethi
- Department of Laboratory Medicine, National University Hospital, Singapore
| | - Samuel S W Tay
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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14
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Chin W, Zhong G, Pu Q, Yang C, Lou W, De Sessions PF, Periaswamy B, Lee A, Liang ZC, Ding X, Gao S, Chu CW, Bianco S, Bao C, Tong YW, Fan W, Wu M, Hedrick JL, Yang YY. A macromolecular approach to eradicate multidrug resistant bacterial infections while mitigating drug resistance onset. Nat Commun 2018; 9:917. [PMID: 29500445 PMCID: PMC5834525 DOI: 10.1038/s41467-018-03325-6] [Citation(s) in RCA: 217] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 02/06/2018] [Indexed: 11/09/2022] Open
Abstract
Polymyxins remain the last line treatment for multidrug-resistant (MDR) infections. As polymyxins resistance emerges, there is an urgent need to develop effective antimicrobial agents capable of mitigating MDR. Here, we report biodegradable guanidinium-functionalized polycarbonates with a distinctive mechanism that does not induce drug resistance. Unlike conventional antibiotics, repeated use of the polymers does not lead to drug resistance. Transcriptomic analysis of bacteria further supports development of resistance to antibiotics but not to the macromolecules after 30 treatments. Importantly, high in vivo treatment efficacy of the macromolecules is achieved in MDR A. baumannii-, E. coli-, K. pneumoniae-, methicillin-resistant S. aureus-, cecal ligation and puncture-induced polymicrobial peritonitis, and P. aeruginosa lung infection mouse models while remaining non-toxic (e.g., therapeutic index—ED50/LD50: 1473 for A. baumannii infection). These biodegradable synthetic macromolecules have been demonstrated to have broad spectrum in vivo antimicrobial activity, and have excellent potential as systemic antimicrobials against MDR infections. Antibiotic resistance is a major threat across the whole healthcare spectrum. Here, the authors report on the development of biodegradable guanidinium functionalized polycarbonates and demonstrate antimicrobial activity against drug resistant infections.
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Affiliation(s)
- Willy Chin
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore.,NUS Graduate School for Integrative Sciences and Engineering (NGS), 28 Medical Drive, Singapore, 117456, Singapore
| | - Guansheng Zhong
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | - Qinqin Pu
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58203, USA
| | - Chuan Yang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore
| | - Weiyang Lou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | | | | | - Ashlynn Lee
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore
| | - Xin Ding
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore
| | - Shujun Gao
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore
| | - Collins Wenhan Chu
- Genome Institute of Singapore, 60 Biopolis Street, Genome, Singapore, 138672, Singapore
| | - Simone Bianco
- IBM Almaden Research Center, 650 Harry Road, San Jose, CA, 95120, USA
| | - Chang Bao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | - Yen Wah Tong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore
| | - Weimin Fan
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, China
| | - Min Wu
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, 58203, USA.
| | - James L Hedrick
- IBM Almaden Research Center, 650 Harry Road, San Jose, CA, 95120, USA.
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore, 138669, Singapore.
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15
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Xu K, Liang ZC, Ding X, Hu H, Liu S, Nurmik M, Bi S, Hu F, Ji Z, Ren J, Yang S, Yang YY, Li L. Nanomaterials in the Prevention, Diagnosis, and Treatment of Mycobacterium Tuberculosis Infections. Adv Healthc Mater 2018; 7. [PMID: 28941042 DOI: 10.1002/adhm.201700509] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/23/2017] [Indexed: 11/10/2022]
Abstract
Despite the tremendous advancements that have been made in biomedical research, Mycobacterium tuberculosis (TB) still remains one of the top 10 causes of death worldwide, outpacing the Human Immunodeficiency Virus as a leading cause of death from an infectious disease. In the light of such significant disease burden, tremendous efforts have been made worldwide to stem this burgeoning spread of disease. The use of nanomaterials in TB management has increased in the past decade, particularly in the areas of early TB detection, prevention, and treatment. Nanomaterials have been proven to be efficacious in the rapid and accurate detection of TB pathogens. Novel nanocarriers have also shown tremendous promise in improving drug delivery, potentially enhancing drug concentrations in target organs while at the same time, reducing treatment frequency. In addition, the engineering of antigen nanocarriers represents an exciting front in TB research, potentially paving the way for the successful development of a new class of effective TB vaccines. This article discusses epidemiology and pathogenesis of TB infections, current TB therapeutics, advanced nanomaterials for anti-TB drug delivery, and TB vaccines. In addition, challenges and future perspectives in developing safe and effective nanomaterials in TB diagnosis and therapy are also presented.
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Affiliation(s)
- Kaijin Xu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way The Nanos 138669 Singapore
| | - Xin Ding
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way The Nanos 138669 Singapore
| | - Haiyang Hu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Shaoqiong Liu
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way The Nanos 138669 Singapore
| | - Martin Nurmik
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way The Nanos 138669 Singapore
| | - Sheng Bi
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Feishu Hu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Zhongkang Ji
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Jingjing Ren
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Shigui Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way The Nanos 138669 Singapore
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; The First Affiliated Hospital; College of Medicine; Zhejiang University; Hangzhou 310003 P. R. China
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16
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Tan JPK, Coady DJ, Sardon H, Yuen A, Gao S, Lim SW, Liang ZC, Tan EW, Venkataraman S, Engler AC, Fevre M, Ono R, Yang YY, Hedrick JL. Broad Spectrum Macromolecular Antimicrobials with Biofilm Disruption Capability and In Vivo Efficacy. Adv Healthc Mater 2017; 6. [PMID: 28504348 DOI: 10.1002/adhm.201601420] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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: 12/13/2016] [Revised: 03/24/2017] [Indexed: 12/28/2022]
Abstract
In this study, antimicrobial polymers are synthesized by the organocatalytic ring-opening polymerization of an eight-membered heterocyclic carbonate monomer that is subsequently quaternized with methyl iodide. These polymers demonstrate activity against clinically relevant Gram-positive Staphylococcus epidermidis and Staphylococcus aureus, Gram-negative Escherichia coli and Pseudomonas aeruginosa, and fungus Candida albicans with fast killing kinetics. Importantly, the polymer efficiently inhibits biofilm growth and lyses existing biofilm, leading to a reduction in biomass and cell viability. In addition, the macromolecular antimicrobial is less likely to induce resistance as it acts via a membrane-lytic mechanism. The polymer is not cytotoxic toward mammalian cells with LD50 of 99.0 ± 11.6 mg kg-1 in mice through i.v. injection. In an S. aureus blood stream infection mouse model, the polymer removes bacteria from the blood more rapidly than the antibiotic Augmentin. At the effective dose, the polymer treatment does not damage liver and kidney tissues or functions. In addition, blood electrolyte balance remains unchanged after the treatment. The low cost of starting materials, ease of synthesis, nontoxicity, broad spectrum activity with fast killing kinetics, and in vivo antimicrobial activity make these macromolecular antimicrobials ideal candidates for prevention of sepsis and treatment of infections.
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Affiliation(s)
- Jeremy P. K. Tan
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Daniel J. Coady
- IBM Almaden Research Center; 650 Harry Road San Jose CA 95120 USA
| | - Haritz Sardon
- POLYMAT; University of the Basque Country UPV/EHU Joxe Mari Korta Center; Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
- Ikerbasque, Basque Foundation for Science; E-48011 Bilbao Spain
| | - Alexander Yuen
- POLYMAT; University of the Basque Country UPV/EHU Joxe Mari Korta Center; Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
| | - Shujun Gao
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Shaun W. Lim
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Eddy W. Tan
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Shrinivas Venkataraman
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - Amanda C. Engler
- IBM Almaden Research Center; 650 Harry Road San Jose CA 95120 USA
| | - Mareva Fevre
- IBM Almaden Research Center; 650 Harry Road San Jose CA 95120 USA
| | - Robert Ono
- IBM Almaden Research Center; 650 Harry Road San Jose CA 95120 USA
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way Singapore 138669 Singapore
| | - James L. Hedrick
- IBM Almaden Research Center; 650 Harry Road San Jose CA 95120 USA
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17
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Liu S, Ono RJ, Wu H, Teo JY, Liang ZC, Xu K, Zhang M, Zhong G, Tan JP, Ng M, Yang C, Chan J, Ji Z, Bao C, Kumar K, Gao S, Lee A, Fevre M, Dong H, Ying JY, Li L, Fan W, Hedrick JL, Yang YY. Highly potent antimicrobial polyionenes with rapid killing kinetics, skin biocompatibility and in vivo bactericidal activity. Biomaterials 2017; 127:36-48. [DOI: 10.1016/j.biomaterials.2017.02.027] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 02/07/2017] [Accepted: 02/26/2017] [Indexed: 10/20/2022]
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18
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Zhong G, Cheng J, Liang ZC, Xu L, Lou W, Bao C, Ong ZY, Dong H, Yang YY, Fan W. Short Synthetic β-Sheet Antimicrobial Peptides for the Treatment of Multidrug-Resistant Pseudomonas aeruginosa Burn Wound Infections. Adv Healthc Mater 2017; 6. [PMID: 28135045 DOI: 10.1002/adhm.201601134] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/12/2016] [Indexed: 12/28/2022]
Abstract
Pseudomonas aeruginosa is often implicated in burn wound infections; its inherent drug resistance often renders these infections extremely challenging to treat. This is further compounded by the problem of emerging drug resistance and the dearth of novel antimicrobial drug discovery in recent years. In the perennial search for effective antimicrobial compounds, the authors identify short synthetic β-sheet folding peptides, IRIKIRIK (IK8L), IRIkIrIK (IK8-2D), and irikirik (IK8D) as prime candidates owing to their high potency against Gram-negative bacteria. In this study, the peptides are first assayed against 20 clinically isolated multidrug-resistant P. aeruginosa strains in comparison with the conventional antibiotics imipenem and ceftazidime, and IK8L is demonstrated to be the most effective. IK8L also exhibits superior antibacterial killing kinetics compared to imipenem and ceftazidime. From transmission electron microscopy, confocal microscopy, and protein release analyses, IK8L shows membrane-lytic antimicrobial mechanism. Repeated use of IK8L does not induce drug resistance, while the bacteria develop resistance against the antibiotics after several times of treatment at sublethal doses. Analysis of mouse blood serum chemistry reveals that peptide does not induce systemic toxicity. The potential utility of IK8L in the in vivo treatment of P. aeruginosa-infected burn wounds is further demonstrated in a mouse model.
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Affiliation(s)
- Guansheng Zhong
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Junchi Cheng
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Liang Xu
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Weiyang Lou
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Chang Bao
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Zhan Yuin Ong
- School of Physics and Astronomy and Leeds Institute of Biomedical and Clinical Sciences; University of Leeds; Leeds LS2 9JT UK
| | - Huihui Dong
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology; 31 Biopolis Way, The Nanos Singapore 138669 Singapore
| | - Weimin Fan
- Program of Innovative Therapeutics; Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; First Affiliated Hospital; School of Medicine; Zhejiang University; Key Laboratory of Combined Multi-organ Transplantation; Ministry of Public Health; Key Laboratory of Organ Transplantation; Zhejiang Province Hangzhou 310003 China
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19
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Zhang M, Teo JJ, Liu S, Liang ZC, Ding X, Ono RJ, Breyta G, Engler AC, Coady DJ, Garcia J, Nelson A, Yang YY, Hedrick JL. Simple and cost-effective polycondensation routes to antimicrobial consumer products. Polym Chem 2016. [DOI: 10.1039/c6py00592f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cost-effective macromolecular antimicrobials were synthesized to explore a variety of chemical functional groups that target antimicrobial performance and reduce cytotoxicity.
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Affiliation(s)
| | - Jye Jyn Teo
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Shaoqiong Liu
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Zhen Chang Liang
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Xin Ding
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | | | | | | | | | | | | | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
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20
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Poh CK, Shi Z, Tan XW, Liang ZC, Foo XM, Tan HC, Neoh KG, Wang W. Cobalt chromium alloy with immobilized BMP peptide for enhanced bone growth. J Orthop Res 2011; 29:1424-30. [PMID: 21445991 DOI: 10.1002/jor.21409] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 02/24/2011] [Indexed: 02/04/2023]
Abstract
Cobalt chromium (CoCr) alloys are widely used in orthopedic practice, however, lack of integration into the bone for long-term survival often occurs, leading to implant failure. Revision surgery to address such a failure involves increased risks, complications, and costs. Advances to enhancement of bone-implant interactions would improve implant longevity and long-term results. Therefore, we investigated the effects of BMP peptide covalently grafted to CoCr alloy on osteogenesis. The BMP peptide was derived from the knuckle epitope of bone morphogenic protein-2 (BMP-2) and was conjugated via a cysteine amino acid at the N-terminus. X-ray photoelectron spectroscopy and o-phthaldialdehyde were used to verify successful grafting at various stages of surface functionalization. Surface topography was evaluated from the surface profile determined by atomic force microscopy. Osteoblastic cells (MC3T3-E1) were seeded on the substrates, and the effects of BMP peptide on osteogenic differentiation were evaluated by measuring alkaline phosphatase (ALP) activity and calcium mineral deposition. The functionalized surfaces showed a twofold increase in ALP activity after 2 weeks incubation and a fourfold increase in calcium content after 3 weeks incubation compared to the pristine substrate. These findings are potentially useful in the development of improved CoCr implants for use in orthopedic applications.
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Affiliation(s)
- Chye Khoon Poh
- Department of Orthopaedic Surgery, National University of Singapore, Kent Ridge, Singapore 119074, Singapore
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21
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Tan SSY, Liang ZC, Loh D, Prabhakaran K. Type 1 Bland Sutton colonic atresia complicated by fetalis hydrops in a premature neonate. Scott Med J 2011; 56:120. [PMID: 21680307 DOI: 10.1258/smj.2011.011102] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Colonic atresia (CA) is an unusual cause of neonatal intestinal obstruction where a section of the colon has failed to form, leading to blockage or absence. A premature baby was delivered at 32 weeks of gestation via caesarian section following fetal distress. She was grossly oedematous and diagnosed with severe fetalis hydrops secondary to anaemia. She was resuscitated and stabilized. On the sixth day of life, the neonate's abdomen became severely distended with billous vomiting and failure to pass meconium. We suspected intestinal obstruction and performed an omnipaque enema which revealed dilated small bowel loops and a bowel atresia. Exploratory laparotomy confirmed a Type 1 Bland Sutton CA with mucosal web. An end colostomy was successfully performed and uneventful. In our case report, we describe a rare occurrence of postnatally diagnosed CA, complicated by fetalis hydrops and anaemia.
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Affiliation(s)
- Shaun Shi Yan Tan
- University of Glasgow School of Medicine, Wolfson Medical School Building, University Avenue, Glasgow, G12 8QQ, Scotland, UK.
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22
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23
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Zheng S, Liang ZC, Shao RF, Lam L, Cheng CW, Fung PC. Propagation of white ring-shaped solitons in nematic liquid crystals. Phys Rev A Gen Phys 1988; 38:5941-5943. [PMID: 9900342 DOI: 10.1103/physreva.38.5941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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24
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Chen DN, Fan YJ, Zou J, Liang ZC. [Antitumor and relevant pharmacological effects of pachyman]. Zhong Yao Tong Bao 1987; 12:41-3, 63. [PMID: 3449252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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25
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Zhu ZF, Liang ZC. [G gamma/A gamma ratio of fetal hemoglobin of newborn infants in Xinjiang and gene mapping of two cases with abnormal ratios]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1986; 8:445-9. [PMID: 2439217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Zhang ML, Ying QL, Liang ZC. [A simple method for isolation and purification of transferrin from human serum]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1985; 7:154-7. [PMID: 2936505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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27
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Huang XT, Zhang FH, Liang J, Liang ZC. [Topological isomers of pBR322 DNA in vivo]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1985; 7:20-4. [PMID: 2986863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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28
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Liu GY, Zhang GX, Nie SY, Luo HY, Tao ZY, Zhang LY, Chen SS, Jia PC, Liang ZC. [A case of HbG Chinese found in Henan]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:48-50. [PMID: 6238696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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29
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Chen SS, Yang KG, Jia PC, Ma YL, Wu SZ, Liang ZC, Huang YW, Wang RX, Zhang NJ. [A case of abnormal hemoglobin doubly heterozygous for Hb New York and HbE found in Maonan ethnic group in China]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:43-7. [PMID: 6238695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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30
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Qi ZB, Ying QL, Wang LF, Liang ZC. [Haptoglobinemia (HpO) in Chinese]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:5-7. [PMID: 6238697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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31
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Huang SZ, Luo HY, Liang ZC, Zeng LZ, Zhang GY, Duan XM, Xu JS, Zheng LF, Yang SY, Zhang GL. [Hemoglobin G Coushatta in Northeast China with structural studies (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:13-6. [PMID: 6461424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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32
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Huang SZ, Luo HY, Liang ZC, Teng YQ, Song M, Liu SP. [A case of hemoglobin E in Inner Mongolia (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:17-9. [PMID: 6461425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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33
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Chen SS, Chen RJ, Xu ZH, Liang ZC, Jia PC, Yang KG. [Studies on abnormal hemoglobin in China: structural analysis of a case of Hb New York (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:9-12. [PMID: 6461436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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