LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 11

Search options

  1. Article ; Online: Advances in understanding immune homeostasis in latent tuberculosis infection.

    Niu, Liangfei / Wang, Hao / Luo, Geyang / Zhou, Jing / Hu, Zhidong / Yan, Bo

    WIREs mechanisms of disease

    2024  , Page(s) e1643

    Abstract: Nearly one-fourth of the global population is infected by Mycobacterium tuberculosis (Mtb), and approximately 90%-95% remain asymptomatic as latent tuberculosis infection (LTBI), an estimated 5%-10% of those with latent infections will eventually ... ...

    Abstract Nearly one-fourth of the global population is infected by Mycobacterium tuberculosis (Mtb), and approximately 90%-95% remain asymptomatic as latent tuberculosis infection (LTBI), an estimated 5%-10% of those with latent infections will eventually progress to active tuberculosis (ATB). Although it is widely accepted that LTBI transitioning to ATB results from a disruption of host immune balance and a weakening of protective immune responses, the exact underlying immunological mechanisms that promote this conversion are not well characterized. Thus, it is difficult to accurately predict tuberculosis (TB) progression in advance, leaving the LTBI population as a significant threat to TB prevention and control. This article systematically explores three aspects related to the immunoregulatory mechanisms and translational research about LTBI: (1) the distinct immunocytological characteristics of LTBI and ATB, (2) LTBI diagnostic markers discovery related to host anti-TB immunity and metabolic pathways, and (3) vaccine development focus on LTBI. This article is categorized under: Infectious Diseases > Molecular and Cellular Physiology Infectious Diseases > Genetics/Genomics/Epigenetics Immune System Diseases > Genetics/Genomics/Epigenetics.
    Language English
    Publishing date 2024-02-13
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2692-9368
    ISSN (online) 2692-9368
    DOI 10.1002/wsbm.1643
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Probing infectious disease by single-cell RNA sequencing: Progresses and perspectives.

    Luo, Geyang / Gao, Qian / Zhang, Shuye / Yan, Bo

    Computational and structural biotechnology journal

    2020  Volume 18, Page(s) 2962–2971

    Abstract: The increasing application of single-cell RNA sequencing (scRNA-seq) technology in life science and biomedical research has significantly increased our understanding of the cellular heterogeneities in immunology, oncology and developmental biology. This ... ...

    Abstract The increasing application of single-cell RNA sequencing (scRNA-seq) technology in life science and biomedical research has significantly increased our understanding of the cellular heterogeneities in immunology, oncology and developmental biology. This review will summarize the development of various scRNA-seq technologies; primarily discussing the application of scRNA-seq on infectious diseases, and exploring the current development, challenges, and potential applications of scRNA-seq technology in the future.
    Keywords covid19
    Language English
    Publishing date 2020-10-21
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2694435-2
    ISSN 2001-0370
    ISSN 2001-0370
    DOI 10.1016/j.csbj.2020.10.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Temporal and cellular analysis of granuloma development in mycobacterial infected adult zebrafish.

    Luo, Geyang / Zeng, Dong / Liu, Jianxin / Li, Duoduo / Takiff, Howard E / Song, Shu / Gao, Qian / Yan, Bo

    Journal of leukocyte biology

    2023  Volume 115, Issue 3, Page(s) 525–535

    Abstract: Because granulomas are a hallmark of tuberculosis pathogenesis, the study of the dynamic changes in their cellular composition and morphological character can facilitate our understanding of tuberculosis pathogenicity. Adult zebrafish infected with ... ...

    Abstract Because granulomas are a hallmark of tuberculosis pathogenesis, the study of the dynamic changes in their cellular composition and morphological character can facilitate our understanding of tuberculosis pathogenicity. Adult zebrafish infected with Mycobacterium marinum form granulomas that are similar to the granulomas in human patients with tuberculosis and therefore have been used to study host-mycobacterium interactions. Most studies of zebrafish granulomas, however, have focused on necrotic granulomas, while a systematic description of the different stages of granuloma formation in the zebrafish model is lacking. Here, we characterized the stages of granulomas in M. marinum-infected zebrafish, including early immune cell infiltration, nonnecrotizing granulomas, and necrotizing granulomas, using corresponding samples from patients with pulmonary tuberculosis as references. We combined hematoxylin and eosin staining and in situ hybridization to identify the different immune cell types and follow their spatial distribution in the different stages of granuloma development. The macrophages in zebrafish granulomas were shown to belong to distinct subtypes: epithelioid macrophages, foamy macrophages, and multinucleated giant cells. By defining the developmental stages of zebrafish granulomas and the spatial distribution of the different immune cells they contain, this work provides a reference for future studies of mycobacterial granulomas and their immune microenvironments.
    MeSH term(s) Animals ; Humans ; Zebrafish/microbiology ; Mycobacterium ; Tuberculosis ; Mycobacterium Infections, Nontuberculous ; Granuloma/microbiology ; Granuloma/pathology ; Mycobacterium tuberculosis
    Language English
    Publishing date 2023-11-20
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 605722-6
    ISSN 1938-3673 ; 0741-5400
    ISSN (online) 1938-3673
    ISSN 0741-5400
    DOI 10.1093/jleuko/qiad145
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Negative Regulator Nlrc3-like Maintain the Balanced Innate Immune Response During Mycobacterial Infection in Zebrafish.

    Niu, Liangfei / Luo, Geyang / Liang, Rui / Qiu, Chenli / Yang, Jianwei / Xie, Lingling / Zhang, Kaile / Tian, Yu / Wang, Decheng / Song, Shu / Takiff, Howard E / Wong, Ka-Wing / Fan, Xiaoyong / Gao, Qian / Yan, Bo

    Frontiers in immunology

    2022  Volume 13, Page(s) 893611

    Abstract: The NOD-like receptors (NLRs) have been shown to be involved in infection and autoinflammatory disease. Previously, we identified a zebrafish NLR, ...

    Abstract The NOD-like receptors (NLRs) have been shown to be involved in infection and autoinflammatory disease. Previously, we identified a zebrafish NLR,
    MeSH term(s) Animals ; Humans ; Immunity, Innate ; Inflammasomes/metabolism ; Intercellular Signaling Peptides and Proteins/genetics ; Intracellular Signaling Peptides and Proteins/metabolism ; Mycobacterium Infections, Nontuberculous ; NLR Proteins/metabolism ; Zebrafish/metabolism ; Zebrafish Proteins/metabolism
    Chemical Substances Inflammasomes ; Intercellular Signaling Peptides and Proteins ; Intracellular Signaling Peptides and Proteins ; NLR Proteins ; Zebrafish Proteins ; nlrc3l protein, zebrafish
    Language English
    Publishing date 2022-05-25
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2022.893611
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Discrete-Time Nonzero-Sum Games for Multiplayer Using Policy-Iteration-Based Adaptive Dynamic Programming Algorithms.

    Zhang, Huaguang / Jiang, He / Luo, Chaomin / Xiao, Geyang

    IEEE transactions on cybernetics

    2017  Volume 47, Issue 10, Page(s) 3331–3340

    Abstract: In this paper, we investigate the nonzero-sum games for a class of discrete-time (DT) nonlinear systems by using a novel policy iteration (PI) adaptive dynamic programming (ADP) method. The main idea of our proposed PI scheme is to utilize the iterative ... ...

    Abstract In this paper, we investigate the nonzero-sum games for a class of discrete-time (DT) nonlinear systems by using a novel policy iteration (PI) adaptive dynamic programming (ADP) method. The main idea of our proposed PI scheme is to utilize the iterative ADP algorithm to obtain the iterative control policies, which not only ensure the system to achieve stability but also minimize the performance index function for each player. This paper integrates game theory, optimal control theory, and reinforcement learning technique to formulate and handle the DT nonzero-sum games for multiplayer. First, we design three actor-critic algorithms, an offline one and two online ones, for the PI scheme. Subsequently, neural networks are employed to implement these algorithms and the corresponding stability analysis is also provided via the Lyapunov theory. Finally, a numerical simulation example is presented to demonstrate the effectiveness of our proposed approach.
    Language English
    Publishing date 2017-10
    Publishing country United States
    Document type Journal Article
    ISSN 2168-2275
    ISSN (online) 2168-2275
    DOI 10.1109/TCYB.2016.2611613
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: SAM-TB: a whole genome sequencing data analysis website for detection of Mycobacterium tuberculosis drug resistance and transmission.

    Yang, Tingting / Gan, Mingyu / Liu, Qingyun / Liang, Wenying / Tang, Qiqin / Luo, Geyang / Zuo, Tianyu / Guo, Yongchao / Hong, Chuangyue / Li, Qibing / Tan, Weiguo / Gao, Qian

    Briefings in bioinformatics

    2022  Volume 23, Issue 2

    Abstract: Whole genome sequencing (WGS) can provide insight into drug-resistance, transmission chains and the identification of outbreaks, but data analysis remains an obstacle to its routine clinical use. Although several drug-resistance prediction tools have ... ...

    Abstract Whole genome sequencing (WGS) can provide insight into drug-resistance, transmission chains and the identification of outbreaks, but data analysis remains an obstacle to its routine clinical use. Although several drug-resistance prediction tools have appeared, until now no website integrates drug-resistance prediction with strain genetic relationships and species identification of nontuberculous mycobacteria (NTM). We have established a free, function-rich, user-friendly online platform for MTB WGS data analysis (SAM-TB, http://samtb.szmbzx.com) that integrates drug-resistance prediction for 17 antituberculosis drugs, detection of variants, analysis of genetic relationships and NTM species identification. The accuracy of SAM-TB in predicting drug-resistance was assessed using 3177 sequenced clinical isolates with results of phenotypic drug-susceptibility tests (pDST). Compared to pDST, the sensitivity of SAM-TB for detecting multidrug-resistant tuberculosis was 93.9% [95% confidence interval (CI) 92.6-95.1%] with specificity of 96.2% (95% CI 95.2-97.1%). SAM-TB also analyzes the genetic relationships between multiple strains by reconstructing phylogenetic trees and calculating pairwise single nucleotide polymorphism (SNP) distances to identify genomic clusters. The incorporated mlstverse software identifies NTM species with an accuracy of 98.2% and Kraken2 software can detect mixed MTB and NTM samples. SAM-TB also has the capacity to share both sequence data and analysis between users. SAM-TB is a multifunctional integrated website that uses WGS raw data to accurately predict antituberculosis drug-resistance profiles, analyze genetic relationships between multiple strains and identify NTM species and mixed samples containing both NTM and MTB. SAM-TB is a useful tool for guiding both treatment and epidemiological investigation.
    MeSH term(s) Antitubercular Agents/pharmacology ; Antitubercular Agents/therapeutic use ; Data Analysis ; Drug Resistance ; Mycobacterium tuberculosis ; Phylogeny ; Whole Genome Sequencing/methods
    Chemical Substances Antitubercular Agents
    Language English
    Publishing date 2022-02-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2068142-2
    ISSN 1477-4054 ; 1467-5463
    ISSN (online) 1477-4054
    ISSN 1467-5463
    DOI 10.1093/bib/bbac030
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Deep whole-genome sequencing reveals no evidence for heteroresistance influencing treatment outcomes among drug-susceptible tuberculosis patients.

    Chen, Yiwang / Jiang, Qi / Zou, Jingyan / Yang, Tingting / Liu, Qingyun / Luo, Geyang / Gan, Mingyu / Jiang, Yuan / Takiff, Howard E / Lu, Liping / Gao, Qian

    Tuberculosis (Edinburgh, Scotland)

    2021  Volume 130, Page(s) 102120

    Abstract: The purpose of this study was to investigate the minimum level of heteroresistance that predicts poor tuberculosis treatment outcomes. This retrospective study enrolled 45 new tuberculosis patients with varied treatment outcomes and 16 drug-susceptible ... ...

    Abstract The purpose of this study was to investigate the minimum level of heteroresistance that predicts poor tuberculosis treatment outcomes. This retrospective study enrolled 45 new tuberculosis patients with varied treatment outcomes and 16 drug-susceptible retreatment cases. Pretreatment isolates from these 61 patients were whole genome sequenced to detect heteroresistance. Heteroresistance was not found in isolates from any of the new patients, but was detected in isolates from retreatment patients who were nevertheless cured. The results of our small series of patients suggest that heteroresistance <1%, the threshold used to define resistance with the phenotypic proportion method, is not associated with poor treatment outcomes.
    MeSH term(s) Adult ; Aged ; Drug Resistance, Bacterial ; Female ; Genome, Bacterial ; Humans ; Male ; Middle Aged ; Mycobacterium tuberculosis/drug effects ; Mycobacterium tuberculosis/genetics ; Retrospective Studies ; Treatment Outcome ; Tuberculosis/drug therapy ; Tuberculosis/microbiology ; Whole Genome Sequencing
    Language English
    Publishing date 2021-08-14
    Publishing country Scotland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2046804-0
    ISSN 1873-281X ; 1472-9792
    ISSN (online) 1873-281X
    ISSN 1472-9792
    DOI 10.1016/j.tube.2021.102120
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Citywide Transmission of Multidrug-resistant Tuberculosis Under China's Rapid Urbanization: A Retrospective Population-based Genomic Spatial Epidemiological Study.

    Jiang, Qi / Liu, Qingyun / Ji, Lecai / Li, Jinli / Zeng, Yaling / Meng, Liangguang / Luo, Geyang / Yang, Chongguang / Takiff, Howard E / Yang, Zheng / Tan, Weiguo / Yu, Weiye / Gao, Qian

    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

    2019  Volume 71, Issue 1, Page(s) 142–151

    Abstract: Background: Population movement could extend multidrug-resistant tuberculosis (MDR-TB) transmission and complicate its global prevalence. We sought to identify the high-risk populations and geographic sites of MDR-TB transmission in Shenzhen, the most ... ...

    Abstract Background: Population movement could extend multidrug-resistant tuberculosis (MDR-TB) transmission and complicate its global prevalence. We sought to identify the high-risk populations and geographic sites of MDR-TB transmission in Shenzhen, the most common destination for internal migrants in China.
    Methods: We performed a population-based, retrospective study in patients diagnosed with MDR-TB in Shenzhen during 2013-2017. By defining genomic clusters with a threshold of 12-single-nucleotide polymorphism distance based on whole-genome sequencing of their clinical strains, the clustering rate was calculated to evaluate the level of recent transmission. Risk factors were identified by multivariable logistic regression. To further delineate the epidemiological links, we invited the genomic-clustered patients to an in-depth social network investigation.
    Results: In total, 105 (25.2%) of the 417 enrolled patients with MDR-TB were grouped into 40 genome clusters, suggesting recent transmission of MDR strains. The adjusted risk for student to have a clustered strain was 4.05 (95% confidence interval, 1.06-17.0) times greater than other patients. The majority (70%, 28/40) of the genomic clusters involved patients who lived in different districts, with residences separated by an average of 8.76 kilometers. Other than household members, confirmed epidemiological links were also identified among classmates and workplace colleagues.
    Conclusions: These findings demonstrate that local transmission of MDR-TB is a serious problem in Shenzhen. While most transmission occurred between people who lived distant from each other, there was clear evidence that transmission occurred in schools and workplaces, which should be included as targeted sites for active case finding.The average residential distance between genomic-clustered cases was more than 8 kilometers, while schools and workplaces, identified as sites of transmission in this study, deserve increased vigilance for targeted case finding of multidrug-resistant tuberculosis.
    MeSH term(s) Antitubercular Agents/pharmacology ; Antitubercular Agents/therapeutic use ; China/epidemiology ; Genomics ; Humans ; Mycobacterium tuberculosis/genetics ; Retrospective Studies ; Tuberculosis, Multidrug-Resistant/drug therapy ; Tuberculosis, Multidrug-Resistant/epidemiology ; Urbanization
    Chemical Substances Antitubercular Agents
    Language English
    Publishing date 2019-09-05
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1099781-7
    ISSN 1537-6591 ; 1058-4838
    ISSN (online) 1537-6591
    ISSN 1058-4838
    DOI 10.1093/cid/ciz790
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Human Chrysomya bezziana myiasis

    Xianyi Zhou / Dzinkambani Moffat Kambalame / Sitong Zhou / Xiang Guo / Dan Xia / Yemei Yang / Rangke Wu / Juan Luo / Fenglong Jia / Mingchi Yuen / Yuehua Xu / Geyang Dai / Li Li / Tian Xie / Santhosh Puthiyakunnon / Wenxia Wei / Lixian Xie / Siting Liang / Yuqin Feng /
    Songgen Huang / Yongxuan Hu / Qianzhen Mo / Rongjia Mai / Xiaoqing Zhang / Philip Spradbery / Xiaohong Zhou

    PLoS Neglected Tropical Diseases, Vol 13, Iss 10, p e

    A systematic review.

    2019  Volume 0007391

    Abstract: BACKGROUND:Myiasis due to Old World screw-worm fly, Chrysomya bezziana, is an important obligate zoonotic disease in the OIE-list of diseases and is found throughout much of Africa, the Indian subcontinent, southeast and east Asia. C. bezziana myiasis ... ...

    Abstract BACKGROUND:Myiasis due to Old World screw-worm fly, Chrysomya bezziana, is an important obligate zoonotic disease in the OIE-list of diseases and is found throughout much of Africa, the Indian subcontinent, southeast and east Asia. C. bezziana myiasis causes not only morbidity and death to animals and humans, but also economic losses in the livestock industries. Because of the aggressive and destructive nature of this disease in hosts, we initiated this study to provide a comprehensive understanding of human myiasis caused by C. bezziana. METHODS:We searched the databases in English (PubMed, Embase and African Index Medicus) and Chinese (CNKI, Wanfang, and Duxiu), and international government online reports to 6th February, 2019, to identify studies concerning C. bezziana. Another ten human cases in China and Papua New Guinea that our team had recorded were also included. RESULTS:We retrieved 1,048 reports from which 202 studies were ultimately eligible for inclusion in the present descriptive analyses. Since the first human case due to C. bezziana was reported in 1909, we have summarized 291 cases and found that these cases often occurred in patients with poor hygiene, low socio-economic conditions, old age, and underlying diseases including infections, age-related diseases, and noninfectious chronic diseases. But C. bezziana myiasis appears largely neglected as a serious medical or veterinary condition, with human and animal cases only reported in 16 and 24 countries respectively, despite this fly species being recorded in 44 countries worldwide. CONCLUSION:Our findings indicate that cryptic myiasis cases due to the obligate parasite, C. bezziana, are under-recognized. Through this study on C. bezziana etiology, clinical features, diagnosis, treatment, epidemiology, prevention and control, we call for more vigilance and awareness of the disease from governments, health authorities, clinicians, veterinary workers, nursing homes, and also the general public.
    Keywords Arctic medicine. Tropical medicine ; RC955-962 ; Public aspects of medicine ; RA1-1270
    Subject code 610
    Language English
    Publishing date 2019-10-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  10. Article ; Online: Human Chrysomya bezziana myiasis: A systematic review.

    Zhou, Xianyi / Kambalame, Dzinkambani Moffat / Zhou, Sitong / Guo, Xiang / Xia, Dan / Yang, Yemei / Wu, Rangke / Luo, Juan / Jia, Fenglong / Yuen, Mingchi / Xu, Yuehua / Dai, Geyang / Li, Li / Xie, Tian / Puthiyakunnon, Santhosh / Wei, Wenxia / Xie, Lixian / Liang, Siting / Feng, Yuqin /
    Huang, Songgen / Hu, Yongxuan / Mo, Qianzhen / Mai, Rongjia / Zhang, Xiaoqing / Spradbery, Philip / Zhou, Xiaohong

    PLoS neglected tropical diseases

    2019  Volume 13, Issue 10, Page(s) e0007391

    Abstract: Background: Myiasis due to Old World screw-worm fly, Chrysomya bezziana, is an important obligate zoonotic disease in the OIE-list of diseases and is found throughout much of Africa, the Indian subcontinent, southeast and east Asia. C. bezziana myiasis ... ...

    Abstract Background: Myiasis due to Old World screw-worm fly, Chrysomya bezziana, is an important obligate zoonotic disease in the OIE-list of diseases and is found throughout much of Africa, the Indian subcontinent, southeast and east Asia. C. bezziana myiasis causes not only morbidity and death to animals and humans, but also economic losses in the livestock industries. Because of the aggressive and destructive nature of this disease in hosts, we initiated this study to provide a comprehensive understanding of human myiasis caused by C. bezziana.
    Methods: We searched the databases in English (PubMed, Embase and African Index Medicus) and Chinese (CNKI, Wanfang, and Duxiu), and international government online reports to 6th February, 2019, to identify studies concerning C. bezziana. Another ten human cases in China and Papua New Guinea that our team had recorded were also included.
    Results: We retrieved 1,048 reports from which 202 studies were ultimately eligible for inclusion in the present descriptive analyses. Since the first human case due to C. bezziana was reported in 1909, we have summarized 291 cases and found that these cases often occurred in patients with poor hygiene, low socio-economic conditions, old age, and underlying diseases including infections, age-related diseases, and noninfectious chronic diseases. But C. bezziana myiasis appears largely neglected as a serious medical or veterinary condition, with human and animal cases only reported in 16 and 24 countries respectively, despite this fly species being recorded in 44 countries worldwide.
    Conclusion: Our findings indicate that cryptic myiasis cases due to the obligate parasite, C. bezziana, are under-recognized. Through this study on C. bezziana etiology, clinical features, diagnosis, treatment, epidemiology, prevention and control, we call for more vigilance and awareness of the disease from governments, health authorities, clinicians, veterinary workers, nursing homes, and also the general public.
    MeSH term(s) Animals ; Databases, Factual ; Diptera/cytology ; Diptera/pathogenicity ; Diptera/physiology ; Humans ; Hygiene ; Life Cycle Stages ; Screw Worm Infection/diagnosis ; Screw Worm Infection/epidemiology ; Screw Worm Infection/prevention & control ; Screw Worm Infection/therapy ; Socioeconomic Factors ; Treatment Outcome ; Zoonoses/epidemiology ; Zoonoses/parasitology
    Language English
    Publishing date 2019-10-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Systematic Review
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2727
    ISSN (online) 1935-2735
    ISSN 1935-2727
    DOI 10.1371/journal.pntd.0007391
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top