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  1. Article ; Online: Exogenous methionine contributes to reversing the resistance of

    Dong, Chun-Liu / Wu, Tong / Dong, Yue / Qu, Qian-Wei / Chen, Xue-Ying / Li, Yan-Hua

    Microbiology spectrum

    2024  Volume 12, Issue 2, Page(s) e0280323

    Abstract: Streptococcus ... ...

    Abstract Streptococcus suis
    MeSH term(s) Humans ; Animals ; Swine ; Streptococcus suis/genetics ; Macrolides/therapeutic use ; Methionine/metabolism ; Methionine/therapeutic use ; Doxycycline/therapeutic use ; Streptococcal Infections/microbiology ; Anti-Bacterial Agents/therapeutic use ; Ciprofloxacin ; Homocysteine/metabolism ; Homocysteine/therapeutic use
    Chemical Substances Macrolides ; Methionine (AE28F7PNPL) ; Doxycycline (N12000U13O) ; Anti-Bacterial Agents ; Ciprofloxacin (5E8K9I0O4U) ; Homocysteine (0LVT1QZ0BA)
    Language English
    Publishing date 2024-01-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.02803-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: GrpE and ComD contribute to the adherence, biofilm formation, and pathogenicity of Streptococcus suis

    Yu, Fei / Dong, Chunliu / Zhang, Yuefeng / Che, Ruixiang / Xie, Chunmei / Liu, Yanyan / Zhang, Zhiyun / Li, Lu / Chen, Xueying / Cai, Xuehui / Wang, Gang / Li, Yanhua

    Arch Microbiol. 2023 Apr., v. 205, no. 4 p.159-159

    2023  

    Abstract: Streptococcus suis is a major bacterial pathogen of swine and an emerging zoonotic agent that has to date resulted in substantial economic losses to the swine industry worldwide, and can cause persistent infection by forming biofilms. GrpE and histidine ... ...

    Abstract Streptococcus suis is a major bacterial pathogen of swine and an emerging zoonotic agent that has to date resulted in substantial economic losses to the swine industry worldwide, and can cause persistent infection by forming biofilms. GrpE and histidine protein kinase ComD are important proteins implicated in the pathogenicity of S. suis, although whether they play roles in adhesion and biofilm formation has yet to be sufficiently clarified. In this study, we constructed grpE and comD deletion strains of S. suis by homologous recombination, and examined their cell adhesion and biofilm formation capacities compared with those of the wild-type strain. The pathogenicity of the grpE and comD deletion strains was evaluated using a mouse infection model, which revealed that compared with the wild-type, these deletion strains induced milder symptoms and lower bacteremia, as well as comparatively minor organ (brain, spleen, liver, and lung) lesions, in the infected mice. Moreover, the deletion of grpE and comD significantly reduced the pro-inflammatory cytokine (IL-6, IL-1β, and TNF-α) induction capacity of S. suis. Collectively, the findings of this study indicate that the GrpE and ComD proteins of Streptococcus suis play key roles in the adherence to PK-15 cells and the formation of biofilms, thereby contributing to the virulence of this pathogen.
    Keywords Streptococcus suis ; adhesion ; bacteremia ; biofilm ; brain ; cell adhesion ; chronic diseases ; histidine ; homologous recombination ; interleukin-6 ; liver ; lungs ; mice ; models ; pathogens ; pork industry ; protein kinases ; spleen ; swine ; virulence
    Language English
    Dates of publication 2023-04
    Size p. 159.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 124824-8
    ISSN 1432-072X ; 0302-8933
    ISSN (online) 1432-072X
    ISSN 0302-8933
    DOI 10.1007/s00203-023-03503-1
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Germanium Reduces Inflammatory Damage in Mammary Glands During Lipopolysaccharide-Induced Mastitis in Mice.

    Wang, Yong-Sheng / Teng, Guo-Qing / Zhou, Han / Dong, Chun-Liu

    Biological trace element research

    2020  Volume 198, Issue 2, Page(s) 617–626

    Abstract: Ge is a trace element needed for good nutrition and health protection in animals and humans. Ge can be consumed by drinking or eating or administered by injection and transferred with the blood to exert pharmacological activities. The blood is important ... ...

    Abstract Ge is a trace element needed for good nutrition and health protection in animals and humans. Ge can be consumed by drinking or eating or administered by injection and transferred with the blood to exert pharmacological activities. The blood is important in the formation of milk. Mastitis is a serious health hazard in animals and humans. The present study explored the effect of Ge on mastitis and the potential underlying mechanism. A mastitis mouse model was established with LPS. mMECs were prepared for study in vitro. Histopathological changes showed that Ge had a protective effect on mammary gland tissues. Ge inhibited MPO activity to reduce inflammatory cell infiltration during mastitis. ELISA and qPCR results for tissues and cells showed that the expression of TNF-α, IL-1β, and IL-6 was decreased and that of IL-10 was increased by Ge in a dose-dependent manner in mastitis. An analysis of protein phosphorylation was performed with sandwich ELISAs for both tissues and mMECs. The results showed that Ge significantly inhibited the phosphorylation of IκB, NF-κB p65, p38, ERK, and JNK, which was dramatically increased by LPS. These results demonstrate that Ge has an inhibitory effect on inflammation that protects mammary gland tissues by inhibiting NF-κB and MAPK pathway activation and reducing TNF-α, IL-1β, and IL-6 expression. Ge may be an effective clinical treatment for mastitis and other inflammatory diseases.
    MeSH term(s) Animals ; Anti-Inflammatory Agents/therapeutic use ; Female ; Germanium ; Humans ; Lipopolysaccharides/toxicity ; Mammary Glands, Animal ; Mastitis/chemically induced ; Mastitis/drug therapy ; Mice ; Mice, Inbred BALB C ; NF-kappa B
    Chemical Substances Anti-Inflammatory Agents ; Lipopolysaccharides ; NF-kappa B ; Germanium (00072J7XWS)
    Language English
    Publishing date 2020-03-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-020-02106-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Germanium Reduces Inflammatory Damage in Mammary Glands During Lipopolysaccharide-Induced Mastitis in Mice

    Wang, Yong-sheng / Teng, Guo-qing / Zhou, Han / Dong, Chun-liu

    Biological trace element research. 2020 Dec., v. 198, no. 2

    2020  

    Abstract: Ge is a trace element needed for good nutrition and health protection in animals and humans. Ge can be consumed by drinking or eating or administered by injection and transferred with the blood to exert pharmacological activities. The blood is important ... ...

    Abstract Ge is a trace element needed for good nutrition and health protection in animals and humans. Ge can be consumed by drinking or eating or administered by injection and transferred with the blood to exert pharmacological activities. The blood is important in the formation of milk. Mastitis is a serious health hazard in animals and humans. The present study explored the effect of Ge on mastitis and the potential underlying mechanism. A mastitis mouse model was established with LPS. mMECs were prepared for study in vitro. Histopathological changes showed that Ge had a protective effect on mammary gland tissues. Ge inhibited MPO activity to reduce inflammatory cell infiltration during mastitis. ELISA and qPCR results for tissues and cells showed that the expression of TNF-α, IL-1β, and IL-6 was decreased and that of IL-10 was increased by Ge in a dose-dependent manner in mastitis. An analysis of protein phosphorylation was performed with sandwich ELISAs for both tissues and mMECs. The results showed that Ge significantly inhibited the phosphorylation of IκB, NF-κB p65, p38, ERK, and JNK, which was dramatically increased by LPS. These results demonstrate that Ge has an inhibitory effect on inflammation that protects mammary gland tissues by inhibiting NF-κB and MAPK pathway activation and reducing TNF-α, IL-1β, and IL-6 expression. Ge may be an effective clinical treatment for mastitis and other inflammatory diseases.
    Keywords blood ; dose response ; enzyme-linked immunosorbent assay ; germanium ; health hazards ; health promotion ; histopathology ; inflammation ; interleukin-10 ; interleukin-6 ; mammary glands ; mice ; milk ; nutrition ; protective effect ; protein phosphorylation ; research ; trace elements
    Language English
    Dates of publication 2020-12
    Size p. 617-626.
    Publishing place Springer US
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-020-02106-x
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Effects of l-Serine on Macrolide Resistance in Streptococcus suis.

    Wu, Tong / Wang, Xiaozhen / Dong, Yue / Xing, Chen / Chen, Xueying / Li, Lu / Dong, Chunliu / Li, Yanhua

    Microbiology spectrum

    2022  Volume 10, Issue 4, Page(s) e0068922

    Abstract: Streptococcus suis is an important zoonotic pathogen. Due to the indiscriminate use of macrolides, S. suis has developed a high level of drug resistance, which has led to a serious threat to human and animal health. However, it takes a long time to ... ...

    Abstract Streptococcus suis is an important zoonotic pathogen. Due to the indiscriminate use of macrolides, S. suis has developed a high level of drug resistance, which has led to a serious threat to human and animal health. However, it takes a long time to develop new antibacterial drugs. Therefore, we consider the perspective of bacterial physiological metabolism to ensure that the development of bacterial resistance to existing drugs is alleviated and bacterial susceptibility to drugs is restored. In the present study, an untargeted metabolomics analysis showed that the serine catabolic pathway was inhibited in drug-resistant S. suis. The addition of l-serine restored the fungicidal effect of macrolides on S. suis
    MeSH term(s) Animals ; Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Drug Resistance, Bacterial ; Humans ; Macrolides/pharmacology ; Macrolides/therapeutic use ; Microbial Sensitivity Tests ; Reactive Oxygen Species/metabolism ; Reactive Oxygen Species/pharmacology ; Reactive Oxygen Species/therapeutic use ; Serine/metabolism ; Serine/pharmacology ; Serine/therapeutic use ; Streptococcal Infections/drug therapy ; Streptococcal Infections/microbiology ; Streptococcus suis/genetics ; Streptococcus suis/metabolism
    Chemical Substances Anti-Bacterial Agents ; Macrolides ; Reactive Oxygen Species ; Serine (452VLY9402)
    Language English
    Publishing date 2022-07-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.00689-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Relationship between L-lactate dehydrogenase and multidrug resistance in Staphylococcus xylosus

    Yuan, Zhongwei / Wang, Jinpeng / Che, Ruixiang / God’spower, Bello-Onaghise / Zhou, Yonghui / Dong, Chunliu / Li, Lu / Chen, Mingri / Eliphaz, Nsabimana / Liu, Xin / Li, Yanhua

    Arch Microbiol. 2022 Jan., v. 204, no. 1 p.91-91

    2022  

    Abstract: Staphylococcus xylosus is a gram-positive bacterium that has attracted much attention due to its increasing clinical appearance, frequently associated with serious multidrug resistance cases. L-lactate dehydrogenase (LDH) has been related to drug ... ...

    Abstract Staphylococcus xylosus is a gram-positive bacterium that has attracted much attention due to its increasing clinical appearance, frequently associated with serious multidrug resistance cases. L-lactate dehydrogenase (LDH) has been related to drug resistance in several bacterial species. However, the mechanism of multidrug resistance in S. xylosus remains unclear as well as the involvement of LDH in such resistance. To explore the relationship between multidrug resistance and LDH in S. xylosus, we used tylosin-resistant S. xylosus as the parent strain to construct ldh knockout and complemented strains. Then, we tested their resistance to macrolides, lincosamides, tetracyclines, and aminoglycosides. In addition, the enzyme activity, metabolite content, and transcriptional level of key genes involved in the TCA cycle and thioredoxin system were determined to clarify the mechanism of resistance. We observed that the resistance to multiple antibiotics increased significantly after ldh knockout, especially that to lincomycin, whereas antibiotic sensitivity was partially restored in the complemented strain. The levels of pyruvate, nicotinamide adenine dinucleotide, and reactive oxygen species decreased significantly upon ldh knockout, and the activity of isocitrate dehydrogenase and malate dehydrogenase decreased. These results indicate that the lack of LDH promotes multidrug resistance in S. xylosus by inhibiting the TCA cycle and regulating the thioredoxin system.
    Keywords Gram-positive bacteria ; NAD (coenzyme) ; Staphylococcus xylosus ; aminoglycosides ; enzyme activity ; isocitrate dehydrogenase ; lactate dehydrogenase ; lincomycin ; macrolides ; malate dehydrogenase ; metabolites ; multiple drug resistance ; pyruvic acid ; reactive oxygen species ; thioredoxins ; transcription (genetics) ; tricarboxylic acid cycle
    Language English
    Dates of publication 2022-01
    Size p. 91.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 124824-8
    ISSN 1432-072X ; 0302-8933
    ISSN (online) 1432-072X
    ISSN 0302-8933
    DOI 10.1007/s00203-021-02625-8
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  7. Article ; Online: Celastrol Combats Methicillin-Resistant Staphylococcus aureus by Targeting Δ

    Yuan, Zhongwei / Wang, Jun / Qu, Qianwei / Zhu, Zhenxin / Xu, Marc / Zhao, Mengmeng / Sun, Chongxiang / Peng, Haixin / Huang, Xingyu / Dong, Yue / Dong, Chunliu / Zheng, Yadan / Yuan, Shuguang / Li, Yanhua

    Advanced science (Weinheim, Baden-Wurttemberg, Germany)

    2023  Volume 10, Issue 25, Page(s) e2302459

    Abstract: The emergence and rapid spread of methicillin-resistant Staphylococcus aureus (MRSA) raise a critical need for alternative therapeutic options. New antibacterial drugs and targets are required to combat MRSA-associated infections. Based on this study, ... ...

    Abstract The emergence and rapid spread of methicillin-resistant Staphylococcus aureus (MRSA) raise a critical need for alternative therapeutic options. New antibacterial drugs and targets are required to combat MRSA-associated infections. Based on this study, celastrol, a natural product from the roots of Tripterygium wilfordii Hook. f., effectively combats MRSA in vitro and in vivo. Multi-omics analysis suggests that the molecular mechanism of action of celastrol may be related to Δ
    MeSH term(s) Methicillin-Resistant Staphylococcus aureus ; 1-Pyrroline-5-Carboxylate Dehydrogenase/chemistry ; 1-Pyrroline-5-Carboxylate Dehydrogenase/genetics ; 1-Pyrroline-5-Carboxylate Dehydrogenase/metabolism ; Molecular Docking Simulation
    Chemical Substances delta-1-pyrroline-5-carboxylate (2906-39-0) ; 1-Pyrroline-5-Carboxylate Dehydrogenase (EC 1.2.1.88) ; celastrol (L8GG98663L)
    Language English
    Publishing date 2023-06-28
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2808093-2
    ISSN 2198-3844 ; 2198-3844
    ISSN (online) 2198-3844
    ISSN 2198-3844
    DOI 10.1002/advs.202302459
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: New Characterization of Multi-Drug Resistance of

    Dong, Chun-Liu / Che, Rui-Xiang / Wu, Tong / Qu, Qian-Wei / Chen, Mo / Zheng, Si-Di / Cai, Xue-Hui / Wang, Gang / Li, Yan-Hua

    Antibiotics (Basel, Switzerland)

    2023  Volume 12, Issue 1

    Abstract: The aim of this study was to investigate the antimicrobial resistance profiles and genotypes ... ...

    Abstract The aim of this study was to investigate the antimicrobial resistance profiles and genotypes of
    Language English
    Publishing date 2023-01-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2681345-2
    ISSN 2079-6382
    ISSN 2079-6382
    DOI 10.3390/antibiotics12010132
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Sustainable extraction of ligustilide and ferulic acid from Angelicae Sinensis Radix, for antioxidant and anti-inflammatory activities.

    Song, Xuejiao / Liu, Chang / Zhang, Yang / Xiao, Xiaoyue / Han, Guorui / Sun, Kedi / Liu, Shuoqi / Zhang, Zhiyun / Dong, Chunliu / Zheng, Yadan / Chen, Xueying / Xu, Tong / Liu, Yanyan / Li, Yanhua

    Ultrasonics sonochemistry

    2023  Volume 94, Page(s) 106344

    Abstract: The 2030 Agenda for Sustainable Development envisions a rational use of energy and resources in all technological processes. However, in the extraction methods of compounds from medicinal plants and herbs, there is an urgent to reduce the use of organic ... ...

    Abstract The 2030 Agenda for Sustainable Development envisions a rational use of energy and resources in all technological processes. However, in the extraction methods of compounds from medicinal plants and herbs, there is an urgent to reduce the use of organic solvents and increase the energy efficiency of these methods. Therefore, a sustainable extraction method (enzyme and ultrasonic co-assisted aqueous two-phase extraction, EUA-ATPE) of simultaneous extraction and separation of ferulic acid and ligustilide from Angelicae Sinensis Radix (ASR) was developed by integrating enzyme-assisted extraction (EAE) with ultrasonic-assisted aqueous two-phase extraction (UAE- ATPE). The effects of different enzymes, extraction temperature, pH, ultrasonic time, liquid-to-materials ratio, etc., were optimized by single-factor experiments and central composite design (CCD). Under the optimum conditions, the highest comprehensive evaluation value (CEV) and extraction yield were obtained by EUA-ATPE. Furthermore, recovery (R), partition coefficient (K), and scanning electron microscopy (SEM) analysis revealed that enzyme and ultrasonic treatment improved mass transfer diffusion and increased the degree of cell disruption. Besides, the EUA-ATPE extracts have shown great antioxidant and anti-inflammatory activity in vitro. Finally, compared to different extraction methods, EUA-ATPE achieved higher extraction efficiency and higher energy efficiency due to the synergistic effect between EAE and UAE-ATPE. Therefore, the EUA-ATPE provides a sustainable method for extracting bioactive compounds from medicinal plants and herbs, contributing to Sustainable Development Goals (SDG), including SDG-6, SDG-7, SDG-9, SDG-12, and SDG-15.
    MeSH term(s) Plant Extracts/pharmacology ; Plant Extracts/chemistry ; Antioxidants/pharmacology ; Anti-Inflammatory Agents/pharmacology
    Chemical Substances ligustilide (4431-01-0) ; Plant Extracts ; Antioxidants ; ferulic acid (AVM951ZWST) ; Anti-Inflammatory Agents
    Language English
    Publishing date 2023-02-24
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1208333-1
    ISSN 1873-2828 ; 1350-4177
    ISSN (online) 1873-2828
    ISSN 1350-4177
    DOI 10.1016/j.ultsonch.2023.106344
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: GrpE and ComD contribute to the adherence, biofilm formation, and pathogenicity of Streptococcus suis.

    Yu, Fei / Dong, Chunliu / Zhang, Yuefeng / Che, Ruixiang / Xie, Chunmei / Liu, Yanyan / Zhang, Zhiyun / Li, Lu / Chen, Xueying / Cai, Xuehui / Wang, Gang / Li, Yanhua

    Archives of microbiology

    2023  Volume 205, Issue 4, Page(s) 159

    Abstract: Streptococcus suis is a major bacterial pathogen of swine and an emerging zoonotic agent that has to date resulted in substantial economic losses to the swine industry worldwide, and can cause persistent infection by forming biofilms. GrpE and histidine ... ...

    Abstract Streptococcus suis is a major bacterial pathogen of swine and an emerging zoonotic agent that has to date resulted in substantial economic losses to the swine industry worldwide, and can cause persistent infection by forming biofilms. GrpE and histidine protein kinase ComD are important proteins implicated in the pathogenicity of S. suis, although whether they play roles in adhesion and biofilm formation has yet to be sufficiently clarified. In this study, we constructed grpE and comD deletion strains of S. suis by homologous recombination, and examined their cell adhesion and biofilm formation capacities compared with those of the wild-type strain. The pathogenicity of the grpE and comD deletion strains was evaluated using a mouse infection model, which revealed that compared with the wild-type, these deletion strains induced milder symptoms and lower bacteremia, as well as comparatively minor organ (brain, spleen, liver, and lung) lesions, in the infected mice. Moreover, the deletion of grpE and comD significantly reduced the pro-inflammatory cytokine (IL-6, IL-1β, and TNF-α) induction capacity of S. suis. Collectively, the findings of this study indicate that the GrpE and ComD proteins of Streptococcus suis play key roles in the adherence to PK-15 cells and the formation of biofilms, thereby contributing to the virulence of this pathogen.
    MeSH term(s) Animals ; Swine ; Virulence ; Streptococcus suis/genetics ; Biofilms ; Cytokines/metabolism ; Brain ; Disease Models, Animal ; Bacterial Proteins/genetics ; Bacterial Proteins/metabolism
    Chemical Substances Cytokines ; Bacterial Proteins
    Language English
    Publishing date 2023-04-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 124824-8
    ISSN 1432-072X ; 0302-8933
    ISSN (online) 1432-072X
    ISSN 0302-8933
    DOI 10.1007/s00203-023-03503-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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