LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 66

Search options

  1. Article ; Online: Enteric coronavirus PDCoV evokes a non-Warburg effect by hijacking pyruvic acid as a metabolic hub.

    Su, Guanning / Liu, Jiao / Duan, Chenrui / Fang, Puxian / Fang, Liurong / Zhou, Yanrong / Xiao, Shaobo

    Redox biology

    2024  Volume 71, Page(s) 103112

    Abstract: The Warburg effect, also referred as aerobic glycolysis, is a common metabolic program during viral infection. Through targeted metabolomics combined with biochemical experiments and various cell models, we investigated the central carbon metabolism (CCM) ...

    Abstract The Warburg effect, also referred as aerobic glycolysis, is a common metabolic program during viral infection. Through targeted metabolomics combined with biochemical experiments and various cell models, we investigated the central carbon metabolism (CCM) profiles of cells infected with porcine deltacoronavirus (PDCoV), an emerging enteropathogenic coronavirus with zoonotic potential. We found that PDCoV infection required glycolysis but decreased glycolytic flux, exhibiting a non-Warburg effect characterized by pyruvic acid accumulation. Mechanistically, PDCoV enhanced pyruvate kinase activity to promote pyruvic acid anabolism, a process that generates pyruvic acid with concomitant ATP production. PDCoV also hijacked pyruvic acid catabolism to increase biosynthesis of non-essential amino acids (NEAAs), suggesting that pyruvic acid is an essential hub for PDCoV to scavenge host energy and metabolites. Furthermore, PDCoV facilitated glutaminolysis to promote the synthesis of NEAA and pyrimidines for optimal proliferation. Our work supports a novel CCM model after viral infection and provides potential anti-PDCoV drug targets.
    MeSH term(s) Swine ; Animals ; Coronavirus/metabolism ; Pyruvic Acid/metabolism ; Swine Diseases/metabolism ; Swine Diseases/pathology ; Coronavirus Infections/pathology
    Chemical Substances Pyruvic Acid (8558G7RUTR)
    Language English
    Publishing date 2024-03-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2701011-9
    ISSN 2213-2317 ; 2213-2317
    ISSN (online) 2213-2317
    ISSN 2213-2317
    DOI 10.1016/j.redox.2024.103112
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Corrigendum to "Porcine deltacoronavirus accessory protein NS7a possesses the functional characteristics of a viroporin" [Vet. Microbiol. 274 (2022) 109551].

    Xia, Sijin / Fang, Puxian / Pan, Ting / Xiao, Wenwen / Zhang, Huichang / Zhu, Xuerui / Xiao, Shaobo / Fang, Liurong

    Veterinary microbiology

    2023  Volume 286, Page(s) 109877

    Language English
    Publishing date 2023-09-28
    Publishing country Netherlands
    Document type Published Erratum
    ZDB-ID 753154-0
    ISSN 1873-2542 ; 0378-1135
    ISSN (online) 1873-2542
    ISSN 0378-1135
    DOI 10.1016/j.vetmic.2023.109877
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Porcine deltacoronavirus resists antibody neutralization through cell-to-cell transmission.

    Xia, Sijin / Xiao, Wenwen / Zhu, Xuerui / Liao, Shusen / Guo, Jiahui / Zhou, Junwei / Xiao, Shaobo / Fang, Puxian / Fang, Liurong

    Emerging microbes & infections

    2023  Volume 12, Issue 1, Page(s) 2207688

    Abstract: ... ...

    Abstract ABSTRACT
    MeSH term(s) Humans ; Animals ; Swine ; Deltacoronavirus ; Coronavirus/physiology ; Antibodies, Neutralizing ; Coronavirus Infections/veterinary ; Swine Diseases
    Chemical Substances Antibodies, Neutralizing
    Language English
    Publishing date 2023-05-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2681359-2
    ISSN 2222-1751 ; 2222-1751
    ISSN (online) 2222-1751
    ISSN 2222-1751
    DOI 10.1080/22221751.2023.2207688
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Construction and immunogenicity of a trypsin-independent porcine epidemic diarrhea virus variant.

    Li, Mingxiang / Zhang, Yiye / Fang, Yuxin / Xiao, Shaobo / Fang, Puxian / Fang, Liurong

    Frontiers in immunology

    2023  Volume 14, Page(s) 1165606

    Abstract: Porcine epidemic diarrhea virus (PEDV) is a re-emerging enteropathogenic coronavirus that causes high mortality in neonatal piglets. The addition of trypsin plays a crucial role in the propagation of PEDV, but also increases the complexity of vaccine ... ...

    Abstract Porcine epidemic diarrhea virus (PEDV) is a re-emerging enteropathogenic coronavirus that causes high mortality in neonatal piglets. The addition of trypsin plays a crucial role in the propagation of PEDV, but also increases the complexity of vaccine production and increases its cost. Previous studies have suggested that the S2' site and Y976/977 of the PEDV spike (S) protein might be the determinants of PEDV trypsin independence. In this study, to achieve a recombinant trypsin-independent PEDV strain, we used trypsin-dependent genotype 2 (G2) PEDV variant AJ1102 to generate three recombinant PEDVs with mutations in S (S2' site R894G and/or Y976H). The three recombinant PEDVs were still trypsin dependent, suggesting that the S2' site R894 and Y976 of AJ1102 S are not key sites for PEDV trypsin dependence. Therefore, we used AJ1102 and the classical trypsin-independent genotype 1 (G1) PEDV strain JS2008 to generate a recombinant PEDV carrying a chimeric S protein, and successfully obtained trypsin-independent PEDV strain rAJ1102-S2'
    MeSH term(s) Animals ; Swine ; Porcine epidemic diarrhea virus/genetics ; Viral Vaccines/genetics ; Swine Diseases/prevention & control ; Mutation ; Antibodies, Neutralizing/genetics
    Chemical Substances Viral Vaccines ; Antibodies, Neutralizing
    Language English
    Publishing date 2023-03-24
    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.2023.1165606
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Porcine Intestinal Organoids: Overview of the State of the Art.

    Ma, Panpan / Fang, Puxian / Ren, Tianze / Fang, Liurong / Xiao, Shaobo

    Viruses

    2022  Volume 14, Issue 5

    Abstract: The intestinal tract is a crucial part of the body for growth and development, and its dysregulation can cause several diseases. The lack of appropriate in vitro models hampers the development of effective preventions and treatments against these ... ...

    Abstract The intestinal tract is a crucial part of the body for growth and development, and its dysregulation can cause several diseases. The lack of appropriate in vitro models hampers the development of effective preventions and treatments against these intestinal tract diseases. Intestinal organoids are three-dimensional (3D) polarized structures composed of different types of cells capable of self-organization and self-renewal, resembling their organ of origin in architecture and function. Porcine intestinal organoids (PIOs) have been cultured and are used widely in agricultural, veterinary, and biomedical research. Based on the similarity of the genomic sequence, anatomic morphology, and drug metabolism with humans and the difficulty in obtaining healthy human tissue, PIOs are also considered ideal models relative to rodents. In this review, we summarize the current knowledge on PIOs, emphasizing their culturing, establishment and development, and applications in the study of host-microbe interactions, nutritional development, drug discovery, and gene editing potential.
    MeSH term(s) Animals ; Drug Discovery ; Intestines ; Organoids ; Swine
    Language English
    Publishing date 2022-05-21
    Publishing country Switzerland
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v14051110
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Hyperacetylated microtubules assist porcine deltacoronavirus nsp8 to degrade MDA5 via SQSTM1/p62-dependent selective autophagy.

    Li, Zhuang / Lai, Yinan / Qiu, Runhui / Tang, Wenbing / Ren, Jie / Xiao, Shaobo / Fang, Puxian / Fang, Liurong

    Journal of virology

    2024  Volume 98, Issue 3, Page(s) e0000324

    Abstract: The microtubule (MT) is a highly dynamic polymer that functions in various cellular processes through MT hyperacetylation. Thus, many viruses have evolved mechanisms to hijack the MT network of the cytoskeleton to allow intracellular replication of viral ...

    Abstract The microtubule (MT) is a highly dynamic polymer that functions in various cellular processes through MT hyperacetylation. Thus, many viruses have evolved mechanisms to hijack the MT network of the cytoskeleton to allow intracellular replication of viral genomic material. Coronavirus non-structural protein 8 (nsp8), a component of the viral replication transcriptional complex, is essential for viral survival. Here, we found that nsp8 of porcine deltacoronavirus (PDCoV), an emerging enteropathogenic coronavirus with a zoonotic potential, inhibits interferon (IFN)-β production by targeting melanoma differentiation gene 5 (MDA5), the main pattern recognition receptor for coronaviruses in the cytoplasm. Mechanistically, PDCoV nsp8 interacted with MDA5 and induced autophagy to degrade MDA5 in wild-type cells, but not in autophagy-related (ATG)5 or ATG7 knockout cells. Further screening for autophagic degradation receptors revealed that nsp8 interacts with sequestosome 1/p62 and promotes p62-mediated selective autophagy to degrade MDA5. Importantly, PDCoV nsp8 induced hyperacetylation of MTs, which in turn triggered selective autophagic degradation of MDA5 and subsequent inhibition of IFN-β production. Overall, our study uncovers a novel mechanism employed by PDCoV nsp8 to evade host innate immune defenses. These findings offer new insights into the interplay among viruses, IFNs, and MTs, providing a promising target to develop anti-viral drugs against PDCoV.IMPORTANCECoronavirus nsp8, a component of the viral replication transcriptional complex, is well conserved and plays a crucial role in viral replication. Exploration of the role mechanism of nsp8 is conducive to the understanding of viral pathogenesis and development of anti-viral strategies against coronavirus. Here, we found that nsp8 of PDCoV, an emerging enteropathogenic coronavirus with a zoonotic potential, is an interferon antagonist. Further studies showed that PDCoV nsp8 interacted with MDA5 and sequestosome 1/p62, promoting p62-mediated selective autophagy to degrade MDA5. We further found that PDCoV nsp8 could induce hyperacetylation of MT, therefore triggering selective autophagic degradation of MDA5 and inhibiting IFN-β production. These findings reveal a novel immune evasion strategy used by PDCoV nsp8 and provide insights into potential therapeutic interventions.
    MeSH term(s) Animals ; Autophagy ; Coronavirus Infections/metabolism ; Coronavirus Infections/veterinary ; Coronavirus Infections/virology ; Deltacoronavirus/metabolism ; Interferons/metabolism ; Microtubules/metabolism ; Sequestosome-1 Protein/genetics ; Sequestosome-1 Protein/metabolism ; Swine ; Swine Diseases/virology
    Chemical Substances Interferons (9008-11-1) ; Sequestosome-1 Protein
    Language English
    Publishing date 2024-02-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80174-4
    ISSN 1098-5514 ; 0022-538X
    ISSN (online) 1098-5514
    ISSN 0022-538X
    DOI 10.1128/jvi.00003-24
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: HDAC6 Degrades nsp8 of Porcine Deltacoronavirus through Deacetylation and Ubiquitination to Inhibit Viral Replication.

    Li, Zhuang / Duan, Panpan / Qiu, Runhui / Fang, Liurong / Fang, Puxian / Xiao, Shaobo

    Journal of virology

    2023  Volume 97, Issue 5, Page(s) e0037523

    Abstract: Porcine deltacoronavirus (PDCoV) is an emerging swine enteropathogenic coronavirus that has the potential to infect humans. Histone deacetylase 6 (HDAC6) is a unique type IIb cytoplasmic deacetylase with both deacetylase activity and ubiquitin E3 ligase ... ...

    Abstract Porcine deltacoronavirus (PDCoV) is an emerging swine enteropathogenic coronavirus that has the potential to infect humans. Histone deacetylase 6 (HDAC6) is a unique type IIb cytoplasmic deacetylase with both deacetylase activity and ubiquitin E3 ligase activity, which mediates a variety of cellular processes by deacetylating histone and nonhistone substrates. In this study, we found that ectopic expression of HDAC6 significantly inhibited PDCoV replication, while the reverse effects could be observed after treatment with an HDAC6-specific inhibitor (tubacin) or knockdown of HDAC6 expression by specific small interfering RNA. Furthermore, we demonstrated that HDAC6 interacted with viral nonstructural protein 8 (nsp8) in the context of PDCoV infection, resulting in its proteasomal degradation, which was dependent on the deacetylation activity of HDAC6. We further identified the key amino acid residues lysine 46 (K46) and K58 of nsp8 as acetylation and ubiquitination sites, respectively, which were required for HDAC6-mediated degradation. Through a PDCoV reverse genetics system, we confirmed that recombinant PDCoV with a mutation at either K46 or K58 exhibited resistance to the antiviral activity of HDAC6, thereby exhibiting higher replication compared with wild-type PDCoV. Collectively, these findings contribute to a better understanding of the function of HDAC6 in regulating PDCoV infection and provide new strategies for the development of anti-PDCoV drugs.
    MeSH term(s) Animals ; Antiviral Agents/pharmacology ; Antiviral Agents/metabolism ; Coronavirus/metabolism ; Coronavirus Infections ; Histone Deacetylase 6/genetics ; Histone Deacetylase 6/metabolism ; Lysine/metabolism ; Swine ; Swine Diseases ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases/metabolism ; Ubiquitination ; Virus Replication
    Chemical Substances Antiviral Agents ; Histone Deacetylase 6 (EC 3.5.1.98) ; Lysine (K3Z4F929H6) ; Ubiquitin ; Ubiquitin-Protein Ligases (EC 2.3.2.27)
    Language English
    Publishing date 2023-05-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80174-4
    ISSN 1098-5514 ; 0022-538X
    ISSN (online) 1098-5514
    ISSN 0022-538X
    DOI 10.1128/jvi.00375-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: The Characterization and Pathogenicity of a Recombinant Porcine Epidemic Diarrhea Virus Variant ECQ1.

    Mei, Xiaowei / Guo, Jiahui / Fang, Puxian / Ma, Jun / Li, Mingxiang / Fang, Liurong

    Viruses

    2023  Volume 15, Issue 7

    Abstract: Porcine epidemic diarrhea virus (PEDV), a re-emerging enteropathogenic coronavirus, has become the predominant causative agent of lethal diarrhea in piglets, resulting in huge economic losses in many countries. Furthermore, the rapid variability of this ... ...

    Abstract Porcine epidemic diarrhea virus (PEDV), a re-emerging enteropathogenic coronavirus, has become the predominant causative agent of lethal diarrhea in piglets, resulting in huge economic losses in many countries. Furthermore, the rapid variability of this virus has increased the emergence of novel variants with different pathogenicities. In this study, 633 fecal samples collected from diarrheic piglets in China during 2017-2019 were analyzed, and 50.08% (317/633) of these samples were PEDV-positive. The full-length spike (S) genes of 36 samples were sequenced, and a genetic evolution analysis was performed. The results showed that thirty S genes belonged to the GII-a genotype and six S genes belonged to the GII-b genotype. From the PEDV-positive samples, one strain, designated ECQ1, was successfully isolated, and its full-length genome sequence was determined. Interestingly, ECQ1 is a recombinant PEDV between the GII-a (major parent) and GII-b (minor parent) strains, with recombination occurring in the S2 domain of the S gene. The pathogenicity of ECQ1 was assessed in 5-day-old piglets and compared with that of the strain EHuB2, a representative of GII-a PEDV. Although both PEDV strains induced similar fecal viral shedding in the infected piglets, ECQ1 exhibited lower pathogenicity than did EHuB2, as evidenced by reduced mortality and less severe pathological changes in the intestines. These data suggest that PEDV strain ECQ1 is a potential live virus vaccine candidate against porcine epidemic diarrhea.
    MeSH term(s) Animals ; Swine ; Porcine epidemic diarrhea virus ; Virulence ; Coronavirus ; Coronavirus Infections/epidemiology ; Diarrhea/veterinary ; China/epidemiology ; Swine Diseases ; Phylogeny
    Language English
    Publishing date 2023-06-30
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v15071492
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Cleavage of HDAC6 to dampen its antiviral activity by nsp5 is a common strategy of swine enteric coronaviruses.

    Li, Zhuang / Xiao, Wenwen / Yang, Zhixiang / Guo, Jiahui / Zhou, Junwei / Xiao, Shaobo / Fang, Puxian / Fang, Liurong

    Journal of virology

    2024  Volume 98, Issue 2, Page(s) e0181423

    Abstract: HDAC6, a structurally and functionally unique member of the histone deacetylase (HDAC) family, is an important host factor that restricts viral infection. The broad-spectrum antiviral activity of HDAC6 makes it a potent antiviral agent. Previously, we ... ...

    Abstract HDAC6, a structurally and functionally unique member of the histone deacetylase (HDAC) family, is an important host factor that restricts viral infection. The broad-spectrum antiviral activity of HDAC6 makes it a potent antiviral agent. Previously, we found that HDAC6 functions to antagonize porcine deltacoronavirus (PDCoV), an emerging enteropathogenic coronavirus with zoonotic potential. However, the final outcome is typically a productive infection that materializes as cells succumb to viral infection, indicating that the virus has evolved sophisticated mechanisms to combat the antiviral effect of HDAC6. Here, we demonstrate that PDCoV nonstructural protein 5 (nsp5) can cleave HDAC6 at glutamine 519 (Q519), and cleavage of HDAC6 was also detected in the context of PDCoV infection. More importantly, the anti-PDCoV activity of HDAC6 was damaged by nsp5 cleavage. Mechanistically, the cleaved HDAC6 fragments (amino acids 1-519 and 520-1159) lost the ability to degrade PDCoV nsp8 due to their impaired deacetylase activity. Furthermore, nsp5-mediated cleavage impaired the ability of HDAC6 to activate RIG-I-mediated interferon responses. We also tested three other swine enteric coronaviruses (transmissible gastroenteritis virus, porcine epidemic diarrhea virus, and swine acute diarrhea syndrome-coronavirus) and found that all these coronaviruses have adopted similar mechanisms to cleave HDAC6 in both an overexpression system and virus-infected cells, suggesting that cleavage of HDAC6 is a common strategy utilized by swine enteric coronaviruses to antagonize the host's antiviral capacity. Together, these data illustrate how swine enteric coronaviruses antagonize the antiviral function of HDAC6 to maintain their infection, providing new insights to the interaction between virus and host.IMPORTANCEViral infections and host defenses are in constant opposition. Once viruses combat or evade host restriction, productive infection is achieved. HDAC6 is a broad-spectrum antiviral protein that has been demonstrated to inhibit many viruses, including porcine deltacoronavirus (PDCoV). However, whether HDAC6 is reciprocally targeted and disabled by viruses remains unclear. In this study, we used PDCoV as a model and found that HDAC6 is targeted and cleaved by nsp5, a viral 3C-like protease. The cleaved HDAC6 loses its deacetylase activity as well as its ability to degrade viral proteins and activate interferon responses. Furthermore, this cleavage mechanism is shared among other swine enteric coronaviruses. These findings shed light on the intricate interplay between viruses and HDAC6, highlighting the strategies employed by viruses to evade host antiviral defenses.
    MeSH term(s) Animals ; Coronavirus/physiology ; Coronavirus Infections/veterinary ; Coronavirus Infections/virology ; Deltacoronavirus ; Interferons/metabolism ; Swine ; Swine Diseases/virology
    Chemical Substances Interferons (9008-11-1)
    Language English
    Publishing date 2024-01-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80174-4
    ISSN 1098-5514 ; 0022-538X
    ISSN (online) 1098-5514
    ISSN 0022-538X
    DOI 10.1128/jvi.01814-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: ATPase and helicase activities of porcine epidemic diarrhea virus nsp13.

    Ren, Jie / Ding, Zhen / Fang, Puxian / Xiao, Shaobo / Fang, Liurong

    Veterinary microbiology

    2021  Volume 257, Page(s) 109074

    Abstract: Porcine epidemic diarrhea virus (PEDV) is a reemerging Alphacoronavirus that causes lethal diarrhea in piglets. Coronavirus nonstructural protein 13 (nsp13) encodes helicase, which plays pivotal roles during viral replication by unwinding viral RNA. ... ...

    Abstract Porcine epidemic diarrhea virus (PEDV) is a reemerging Alphacoronavirus that causes lethal diarrhea in piglets. Coronavirus nonstructural protein 13 (nsp13) encodes helicase, which plays pivotal roles during viral replication by unwinding viral RNA. However, the biochemical characterization of PEDV nsp13 remains largely unknown. In this study, PEDV nsp13 was expressed in Escherichia coli and purified. The recombinant nsp13 possessed ATPase and helicase activities for binding and unwinding dsDNA/RNA substrates with 5'-overhangs, and Mg
    MeSH term(s) Adenosine Triphosphatases/genetics ; Adenosine Triphosphatases/metabolism ; Adenosine Triphosphate/metabolism ; Animals ; Chlorocebus aethiops ; Coronavirus Infections/virology ; DNA Helicases/genetics ; DNA Helicases/metabolism ; DNA-Binding Proteins/metabolism ; Escherichia coli/genetics ; Porcine epidemic diarrhea virus/enzymology ; RNA, Viral/genetics ; RNA, Viral/metabolism ; Swine ; Swine Diseases/virology ; Vero Cells ; Viral Nonstructural Proteins/genetics ; Viral Nonstructural Proteins/metabolism
    Chemical Substances DNA-Binding Proteins ; RNA, Viral ; Viral Nonstructural Proteins ; Adenosine Triphosphate (8L70Q75FXE) ; Adenosine Triphosphatases (EC 3.6.1.-) ; DNA Helicases (EC 3.6.4.-)
    Language English
    Publishing date 2021-04-26
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 753154-0
    ISSN 1873-2542 ; 0378-1135
    ISSN (online) 1873-2542
    ISSN 0378-1135
    DOI 10.1016/j.vetmic.2021.109074
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top