206 Works

Convergence of carbapenem resistance and hypervirulence in a highly-transmissible ST11 clone of K. pneumoniae: An epidemiological, genomic and functional study

Ping Li, Qiqiang Liang, Wugao Liu, Beiwen Zheng, Lizhang Liu, Wei Wang, Zhijiang Xu, Man Huang & Youjun Feng
Co-occurrence of hypervirulence and KPC-2 carbapenem resistant phenotypes in a highly-transmissible ST11 clone ofKlebsiella pneumoniae has elicited deep concerns from public health stand point. To address this puzzle, we conducted a large-scale epidemiological, clinical and genomic study of K. pneumonia ST11 clones with both hypervirulence and carbapenem resistance in two tertiary hospitals in Zhejiang province. Most of the patients (15/23) were diagnosed with exclusively carbapenem-resistant K. pneumoniae (CRKP) infections. Ten death cases were reported, some...

Human coronavirus dependency on host heat shock protein 90 reveals an antiviral target

Cun Li, Hin Chu, Xiaojuan Liu, Man Chun Chiu, Xiaoyu Zhao, Dong Wang, Yuxuan Wei, Yuxin Hou, Huiping Shuai, Jianpiao Cai, Jasper Fuk-Woo Chan, Jie Zhou & Kwok Yung Yuen
Rapid accumulation of viral proteins in host cells render viruses highly dependent on cellular chaperones including heat shock protein 90 (Hsp90). Three highly pathogenic human coronaviruses, including MERS-CoV, SARS-CoV and SARS-CoV-2, have emerged in the past 2 decades. However, there is no approved antiviral agent against these coronaviruses. We inspected the role of Hsp90 for coronavirus propagation. First, an Hsp90 inhibitor, 17-AAG, significantly suppressed MERS-CoV propagation in cell lines and physiological-relevant human intestinal organoids. Second,...

Establishing a high sensitivity detection method for SARS-CoV-2 IgM/IgG and developing a clinical application of this method

Chunyan Zhang, Lei Zhou, Hao Liu, Sibing Zhang, Yaping Tian, Junli Huo, Fei Li, Yao Zhang, Bo Wei, Dan Xu, Jinwei Hu, Jiayi Wang, Yuxuan Cheng, Wenjie Shi, Xiuli Xu, Jianping Zhou, Peipei Sang, Xudong Tan, Weiwei Wang, Minjie Zhang, Bin Wang, Yujun Zhou, Kan Zhang & Kunlun He
COVID-19 is caused by SARS-CoV-2 infection and was initially discovered in Wuhan. This outbreak quickly spread all over China and then to more than 20 other countries. SARS-CoV-2 fluorescent microsphere immunochromatographic test strips were prepared by the combination of time-resolved fluorescence immunoassay with a lateral flow assay. The analytical performance and clinical evaluation of this testing method was done and the clinical significance of the testing method was verified. The LLOD of SARS-CoV-2 antibody IgG...

Dynamic changes of throat swabs RNA and serum antibodies for SARS-CoV-2 and their diagnostic performances in patients with COVID-19

Xueping Qiu, Yang Xiang, Jianbin Sun, Xinrui Wang, Guoqiang Chen, Xianqun Xu, Shengjun Liao, Na Yang, Siwei Li, Gang Yang, Yueting Tang, Junli Fan, Wen Xie, Hanning Hu, Yirong Li & Fang Zheng
Dynamic changes of RNA and antibodies in SARS-CoV-2 infected patients remain largely unknown, and influence factors for antibody production have not been fully clarified. In this study, consecutive throat swabs specimens (n = 1875) from 187 patients were collected to analyse the dynamic changes of RNA. Moreover, 162 serial serum samples from 31 patients were tested for seroconversion of IgM and IgG. Meanwhile, IgM and IgG were also detected in 409 COVID-19 patients and 389...

Chiral 4-O-acylterpineol as transdermal permeation enhancers: insights of the enhancement mechanisms of a transdermal enantioselective delivery system for flurbiprofen

Tianzhe Chu, Chunyan Wang, Jing Wang, Heping Wang, Dandan Geng, Chensi Wu, Linlin Zhao & Ligang Zhao
In order to devise more effective penetration enhancers, 4-O-acylterpineol derivatives which were expected to be hydrolyzed into nontoxic metabolites by esterase in the living epidermis, were synthesized from 4-terpineol (4-TER) enantiomers and straight chain fatty acids. Their promoting activities on the SR-flurbiprofen and its enantiomers were tested across full-thickness rabbit skin, as well as to correlate under in vitro and in vivo conditions. The permeation studies indicated that both d-4-O-acylterpineol and l-4-O-acylterpineol had significant enhancing...

Ropivacaine inhibits the proliferation and migration of colorectal cancer cells through ITGB1

Xiao Wang & Tianzuo Li
To study whether ropivacaine inhibits the proliferation and migration of colon cancer cells through ITGB1 (Integrin beta-1). First, the effect of ropivacaine on cell proliferation and migration was detected by MTT and Transwell. DAPI staining, annexin V staining and Western blot were used to detect the expression of apoptosis-related proteins to investigate the effect of ropivacaine on cell apoptosis. Using bioinformatics software to predict the potential drug targets of ropivacaine. RT-PCR, Western blot and immunofluorescence...

L-EGCG-Mn nanoparticles as a pH-sensitive MRI contrast agent

Jiali Li, Xue Jiang, Lihuan Shang, Zhen Li, Conglian Yang, Yan Luo, Daoyu Hu, Yaqi Shen & Zhiping Zhang
This study aimed to synthesize and characterize L-epigallocatechin gallate (EGCG) complexed Mn2+ nanoparticle (L-EGCG-Mn), a proof-of-concept pH-sensitive manganese core nanoparticle (NP), and compare its magnetic resonance (MR) properties with those of Gd-DTPA, both in vitro and in vivo. Reverse microemulsion was used to obtain the L-EGCG-Mn NPs. The physicochemical properties of L-EGCG-Mn were characterized using dynamic light scattering, transmission electron microscopy, and near-infrared fluorescence small animal live imaging. The in vitro relaxivity of L-EGCG-Mn incubated...

L-EGCG-Mn nanoparticles as a pH-sensitive MRI contrast agent

Jiali Li, Xue Jiang, Lihuan Shang, Zhen Li, Conglian Yang, Yan Luo, Daoyu Hu, Yaqi Shen & Zhiping Zhang
This study aimed to synthesize and characterize L-epigallocatechin gallate (EGCG) complexed Mn2+ nanoparticle (L-EGCG-Mn), a proof-of-concept pH-sensitive manganese core nanoparticle (NP), and compare its magnetic resonance (MR) properties with those of Gd-DTPA, both in vitro and in vivo. Reverse microemulsion was used to obtain the L-EGCG-Mn NPs. The physicochemical properties of L-EGCG-Mn were characterized using dynamic light scattering, transmission electron microscopy, and near-infrared fluorescence small animal live imaging. The in vitro relaxivity of L-EGCG-Mn incubated...

Age and composition of Neoproterozoic diabase dykes in North Altyn Tagh, northwest China: implications for Rodinia break-up

Yanguang Li, Shuguang Song, Xiaoyong Yang, Zi-Fu Zhao, Jinlong Dong, Xiaofeng Gao, Michael T.D. Wingate, Chao Wang, Meng Li & Mengqi Jin
Whether or not the Altyn Tagh terranes in northwest China were part of the Rodinia supercontinent is unclear due to the apparent absence of rift-related igneous rocks. We present U-Pb geochronology, mineral chemistry, whole-rock major and trace element and Sr-Nd isotope data for the Yapuqiasayi mafic dykes in the North Altyn Tagh. Zircon and baddeleyite from a mafic dyke sample yield indistinguishable U-Pb results and a weighted mean 207Pb/206Pb date of 740 ± 11 Ma,...

Episodic Neoproterozoic extension-related magmatism in the Altyn Tagh, NW China: implications for extension and breakup processes of Rodinia supercontinent

Jiang-bo Hao, Chao Wang, Ji-heng Zhang, Liang Liu, Yong-sheng Gai, Hang Li, Zun-pu Yu, Joseph G Meert, Xiao-ping Long, Xiao-kui Sun & Shuai Zhang
Episodic Neoproterozoic magmatic suites in the Altyn Tagh, NW China, are thought to be related break-up of the Rodinia supercontinent. These suites resulted from long-term extension of the lithosphere during orogenic collapse and subsequent rifting. New geochemical and U-Pb-Hf zircon data indicate that the 825 Ma Hongliugou granite displays the characteristics of A-type granites derived from a juvenile source. Gneissic granites (780–760 Ma) are characterized by high Rb (>200 × 10−6), low Zr/Hf (23.28–29.28) and...

Matrine Inhibitory Effect on Self-renewal and Re-sensitization of 5-FU Resistant NSCLC Stem Cells were through Let-7b dependent Downregulation of CCND1

Xiang Li, Meng Wang, Ning Du, Ting Liang, Guo-Dong Xiao, Kai Li, Ji-Chang Wang, Chong-Wen Xu, Zi-Yang Peng, Shou-Ching Tang & Xin Sun
Matrine is one of the major alkaloids extracted from Sophora flavescens Ait of the traditional Chinese medicine, was the main chemical ingredient of compounds of Kushen injection. The Matrine is considered as a promising therapeutic agent for curing nonsmall cell lung cancer (NSCLC), used either alone or combined with chemotherapeutic agents. In the present study, we focused on the possible roles of Matrine exerted on the self-renewal ability of stem-like cells of the NSCLC group,...

Long noncoding RNA MEG3 suppresses cell proliferation, migration and invasion, induces apoptosis and paclitaxel-resistance via miR-4513/PBLD axis in breast cancer cells

Mingzhi Zhu, Fang Wang, Hailong Mi, Lin Li, Jing Wang, Mingli Han & Yuanting Gu
Breast cancer remains a general-threat event in the health of women. Currently, increasing records indicate that long non-coding RNA maternally expressed 3 (MEG3) plays a central role in breast cancer. The current research focused on the function of MEG3 in paclitaxel (PTX)-resistance and human breast cancer growth. Levels of MEG3, microRNA (miR)-4513, and phenazine biosynthesis-like domain-containing protein (PBLD) were evaluated using quantitative real-time polymerase chain reaction (qRT-PCR) or western blot assays. 3-(4.5-dimethylghiazol-2-yl)-2,5-diphenyltetrazolium Bromide (MTT) assay...

The effect of gestational diabetes on identification of key genes and pathways in human umbilical vein endothelial cell by integrated bioinformatics analysis

Jing Liu, Guang Song, Tao Meng, Ge Zhao & Si Si
Maternal diabetes may lead to long-term risks for the offspring. The study aims at identifying the potential crucial genes and pathways associated with foetal metabolism and malformation of gestational diabetes mellitus (GDM). Gene Expression Series 49524 and 87295 were downloaded from Gene Expression Omnibus database, including eight from GDM and eight from non-GDM. A total of 35 differentially expressed genes were identified. Gene ontology functional annotation and signalling pathway analyses were performed. Four hub genes...

Longitudinal analysis of the antibody repertoire of a Zika virus-infected patient revealed dynamic changes in antibody response

Xuefeng Niu, Qihong Yan, Zhipeng Yao, Fan Zhang, Linbing Qu, Chunlin Wang, Chengrui Wang, Hui Lei, Chaoming Chen, Renshan Liang, Jia Luo, Qian Wang, Lingzhai Zhao, Yudi Zhang, Kun Luo, Longyu Wang, Hongkai Wu, Tingting Liu, Pingchao Li, Zhiqiang Zheng, Yee Joo Tan, Liqiang Feng, Zhenhai Zhang, Jian Han, Fuchun Zhang … & Ling Chen
The Zika virus (ZIKV) is a mosquito-borne flavivirus that causes neonatal abnormalities and other disorders. Antibodies to the ZIKV envelope (E) protein can block infection. In this study, next-generation sequencing (NGS) of immunoglobulin heavy chain (IgH) mRNA transcripts was combined with single-cell PCR cloning of E-binding monoclonal antibodies for analysing antibody response in a patient from the early stages of infection to more than one year after the clearance of the virus. The patient's IgH...

Competing endogenous RNA network profiling reveals novel host dependency factors required for MERS-CoV propagation

Xi Zhang, Hin Chu, Lei Wen, Huiping Shuai, Dong Yang, Yixin Wang, Yuxin Hou, Zheng Zhu, Shuofeng Yuan, Feifei Yin, Jasper Fuk-Woo Chan & Kwok-Yung Yuen
Circular RNAs (circRNAs) are an integral component of the host competitive endogenous RNA (ceRNA) network. These noncoding RNAs are characterized by their unique splicing reactions to form covalently closed loop structures and play important RNA regulatory roles in cells. Recent studies showed that circRNA expressions were perturbed in viral infections and circRNAs might serve as potential antiviral targets. We investigated the host ceRNA network changes and biological relevance of circRNAs in human lung adenocarcinoma epithelial...

Composite quasi-likelihood for single-index models with massive datasets

Rong Jiang, Meng-Fan Guo & Xin Liu
The single-index models (SIMs) provide an efficient way of coping with high-dimensional nonparametric estimation problems and avoid the “curse of dimensionality.” Many existing estimation procedures for SIMs were built on least square loss, which is popular for its mathematical beauty but is non-robust to non-normal errors and outliers. This article addressed the question of both robustness and efficiency of estimation methods based on a new data-driven weighted linear combination of convex loss functions instead of...

Photoelectrochemical Immunosensor Based on ZnIn2S4/Bi2Se3 Nanocomposite for the Determination of Cardiac Troponin I

Wanxin Dong, Xinxin Mo, Yu Wang, Qin Lei & He Li
In this work, a novel flexible photoelectrochemical immunosensor is developed to determine cardiac troponin I (cTnI) in serum. The flower-like ZnIn2S4 nanospheres (ZIS), as signal amplification material, were successfully synthesized by a solvothermal method. The ZIS and Bi2Se3 were modified on the indium tin oxide- polyethylene terephthalate (ITO-PET) electrode, which effectively accelerates the electronic transition and improved the photocurrent conversion efficiency (signal on). However, the binding of antigen–antibody proteins blocks the electron transfer, resulting in...

Base promoted synthesis of 3-benzyl-2,5-diarylpyrazines from arylaldehydes and α-amino ketones

Chao Wang
A novel approach to 3-benzyl-2,5-diarylpyrazine derivatives from α-amino ketones hydrochloride and arylaldehydes in the presence of Na2CO3 has been developed. In contrast with the classic synthetic methods of pyrazines, this protocol does not need additional oxidants and is more friendly to environment.

Different roles of soluble CD40 ligand in central nervous system damage

Li Du, Haoxiao Chang, Yuzhen Wei, Xinghu Zhang & Linlin Yin
Backgroud and purpose: Soluble CD40 ligand (sCD40L) plays an important role in inflammation and autoimmune disorders. There is still a controversy regarding sCD40L in neuromyelitis optica spectrum disorders (NMOSD) and multiple sclerosis (MS). Herein the aims of this study were to evaluate the levels of sCD40L in patients with NMOSD, MS, and other noninflammatory neurological diseases; to investigate its potential relationship with laboratory parameters, glial fibrillary acidic protein (GFAP), thrombopoietin (TPO) and IL-6; and to...

Long-term follow-up of Helicobacter pylori reinfection and its risk factors after initial eradication: a large-scale multicentre, prospective open cohort, observational study

Yong Xie, Conghua Song, Hong Cheng, Canxia Xu, Zhenyu Zhang, Jiangbin Wang, Lijuan Huo, Qin Du, Jianming Xu, Ye Chen, Xiaomei Zhang, Guoxin Zhang, Guibin Yang, Xiuli Zuo, Tao Guo, Yapi Lu, Fen Wang, Xuehong Wang, Kun Zhuang, Shiyao Chen, Wenzhong Liu & Nonghua Lu
Helicobacter pylori (H. pylori) recurrence remains a significant public health concern. The study aimed to assess H. pylori reinfection rate and identify its risk factors in China. This prospective open cohort, observational study was performed at 18 hospitals across 15 provinces in China. Consecutive patients who received the successful initial eradication during 1 January 2012 and 31 December 2018 were eligible for enrolment. H. pylori recurrence was defined as reinfection that occurred at more than...

Structural basis of HCoV-19 fusion core and an effective inhibition peptide against virus entry

Huan Sun, Yan Li, Peipei Liu, Chengpeng Qiao, Xiaomin Wang, Lianao Wu, Kefang Liu, Yu Hu, Chao Su, Shuguang Tan, Shumei Zou, Guizhen Wu, Jinghua Yan, George Fu Gao, Jianxun Qi & Qihui Wang
Structural basis of HCoV-19 fusion core and an effective inhibition peptide against virus entry

Trends in prevalence and incidence of scabies from 1990 to 2017: findings from the global Burden of disease study 2017

Wei Zhang, Yujiao Zhang, Lina Luo, Wenyong Huang, Xiaoping Shen, Xian Dong, Wen Zeng & Hongguang Lu
Scabies remains a significant public health concern globally, affecting people of all ages, races, and socioeconomic groups. The epidemic characteristics of scabies are yet unravelled, especially in high-income countries and elderly population. In this study, we sought to investigate incidence and prevalence and their trends of scabies worldwide from 1990 to 2017 via the Global Burden of Disease (GBD) Study 2017. The prevalence and incidence of scabies tend to a moderate increase after age 70....

Biological characteristics associated with virulence in Clostridioides difficile ribotype 002 in Hong Kong

Ka Yi Kong, Thomas N. Y. Kwong, Hung Chan, Kristine Wong, Samuel S. Y. Wong, Anu P. Chaparala, Raphael C. Y. Chan, Lin Zhang, Joseph J. Y. Sung, Jun Yu, Peter M. Hawkey, Margaret Ip, William K. K. Wu & Sunny H. Wong
Clostridioides difficile infection (CDI) is a common cause of nosocomial diarrhea and can sometimes lead to pseudo-membranous colitis and toxic megacolon. We previously reported that the PCR ribotype 002 was a common C. difficile ribotype in Hong Kong that was associated with increased mortality. In this study, we assessed in vitro bacteriological characteristics and in vivo virulence of ribotype 002 compared to other common ribotypes, including ribotypes 012, 014 and 046. We observed significantly higher...

Super-dominant pathobiontic bacteria in the nasopharyngeal microbiota as causative agents of secondary bacterial infection in influenza patients

Tian Qin, Taoran Geng, Haijian Zhou, Yang Han, Hongyu Ren, Zhifeng Qiu, Xudong Nie, Tiekuan Du, Junrong Liang, Pengcheng Du, Wei Jiang, Taisheng Li & Jianguo Xu
The source of secondary lower respiratory tract bacterial infections in influenza patients is not fully understood. A case–control study was conducted during the 2017–2018 influenza epidemic period in Beijing, China. Nasopharyngeal swabs were collected from 52 virologically confirmed influenza patients and 24 healthy medical staff. The nasopharyngeal microbiota taxonomic composition was analysed using high-throughput sequencing of the 16S rRNA gene V3–V4 regions. The super-dominant pathobiontic bacterial genus (SDPG) was defined as that accounting for >50%...

High neutralizing antibody titer in intensive care unit patients with COVID-19

Li Liu, Kelvin Kai-Wang To, Kwok-Hung Chan, Yik-Chun Wong, Runhong Zhou, Ka-Yi Kwan, Carol Ho-Yan Fong, Lin-Lei Chen, Charlotte Yee-Ki Choi, Lu Lu, Owen Tak-Yin Tsang, Wai-Shing Leung, Wing-Kin To, Ivan Fan-Ngai Hung, Kwok-Yung Yuen & Zhiwei Chen
Coronavirus disease 2019 (COVID-19) has a wide spectrum of disease severity from mild upper respiratory symptoms to respiratory failure. The role of neutralizing antibody (NAb) response in disease progression remains elusive. This study determined the seroprevalence of 733 non-COVID-19 individuals from April 2018 to February 2020 in the Hong Kong Special Administrative Region and compared the neutralizing antibody (NAb) responses of eight COVID-19 patients admitted to the intensive care unit (ICU) with those of 42...

Registration Year

  • 2020

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  • Capital Medical University
  • Chinese Academy of Medical Sciences & Peking Union Medical College
  • Shanghai Jiao Tong University
  • Fudan University
  • Zhejiang University
  • Sichuan University
  • Huazhong University of Science and Technology
  • Sun Yat-sen University
  • Nanjing Medical University
  • Chinese Academy of Sciences