Journal of General Virology最新文献

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The anti-viral protein Shiftless blocks p-body formation during KSHV infection. 在KSHV感染过程中,抗病毒蛋白Shiftless阻断p体的形成。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-03-01 DOI: 10.1099/jgv.0.002229
David Hatfield, William Rodriguez, Timothy Mehrmann, Mandy Muller
{"title":"The anti-viral protein Shiftless blocks p-body formation during KSHV infection.","authors":"David Hatfield, William Rodriguez, Timothy Mehrmann, Mandy Muller","doi":"10.1099/jgv.0.002229","DOIUrl":"10.1099/jgv.0.002229","url":null,"abstract":"<p><p>Processing bodies (P-bodies/PBs) are non-membranous foci involved in coordinating RNA fate by regulating translation and mRNA decay. In this study, we characterize the anti-viral factor Shiftless (SHFL) as a potent disruptor of PB dynamics. We show SHFL expression restricts PB accumulation even in the context of oxidative stress, suggesting that SHFL expression impedes PB formation. Mutational approaches revealed that SHFL RNA-binding activity is not required to restrict PB formation. However, we have identified a new region of SHFL, a bridge between two distant SHFL domains, as necessary for SHFL-mediated PB disruption. Furthermore, we show that SHFL's ability to disrupt PB formation also impacts its anti-viral activity during infection by the gammaherpesvirus Kaposi's sarcoma-associated herpesvirus (KSHV). While WT SHFL efficiently restricts KSHV lytic reactivation, SHFL mutants defective in PB disruption no longer restrict KSHV reactivation. SHFL-mediated PB disruption also leads to increased expression of several anti-viral cytokines, further emphasizing the connection among SHFL, PB dynamics and the SHFL-dependent anti-viral state. Taken together, our observations suggest a role of SHFL in inhibiting PB formation to restrict KSHV lytic replication, reinforcing the importance of crosstalk between RNA fate and the innate immune response to viral infection.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 3","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12987661/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147458045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ICTV Virus Taxonomy Profile: Anelloviridae 2026. ICTV病毒分类概况:无绒病毒科2026。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-03-01 DOI: 10.1099/jgv.0.002222
Simona Kraberger, Tanja Opriessnig, Fabrizio Maggi, Vladimir Celer, Hiroaki Okamoto, Lia van der Hoek, Philippe Biagini, Mart Krupovic, Arvind Varsani
{"title":"ICTV Virus Taxonomy Profile: <i>Anelloviridae</i> 2026.","authors":"Simona Kraberger, Tanja Opriessnig, Fabrizio Maggi, Vladimir Celer, Hiroaki Okamoto, Lia van der Hoek, Philippe Biagini, Mart Krupovic, Arvind Varsani","doi":"10.1099/jgv.0.002222","DOIUrl":"10.1099/jgv.0.002222","url":null,"abstract":"<p><p>The family <i>Anelloviridae</i> includes viruses with circular, negative-sense, ssDNA genomes of 1.7-3.9 kb. Anelloviruses form non-enveloped icosahedral virions constructed of the ORF1 protein, which adopts the single jelly-roll structural fold. Anelloviruses have been isolated from a broad range of birds and mammals, including humans, but are not associated with pathogenicity, except for members of the genus <i>Gyrovirus</i>. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family <i>Anelloviridae</i>, which is available at www.ictv.global/report/anelloviridae.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 3","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13034878/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147574353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of an extremely large-scale genomic rearrangement in the Mpox virus while retaining replicative capacity. 在保留复制能力的同时,确定了m痘病毒中极其大规模的基因组重排。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002215
Takayuki Ishige, Eiji Ido, Toshibumi Taniguchi, Misuzu Yahaba, Yosuke Yamamoto, Takashi Inozume, Yuri Imaizumi, Shota Murata, Kazuyuki Matsushita, Takashi Yaguchi, Sayaka Ban, Hidetoshi Igari
{"title":"Identification of an extremely large-scale genomic rearrangement in the Mpox virus while retaining replicative capacity.","authors":"Takayuki Ishige, Eiji Ido, Toshibumi Taniguchi, Misuzu Yahaba, Yosuke Yamamoto, Takashi Inozume, Yuri Imaizumi, Shota Murata, Kazuyuki Matsushita, Takashi Yaguchi, Sayaka Ban, Hidetoshi Igari","doi":"10.1099/jgv.0.002215","DOIUrl":"10.1099/jgv.0.002215","url":null,"abstract":"<p><p>Understanding the genomic diversity of the Mpox (formerly known as 'monkeypox') virus (MPXV) is important for monitoring viral evolution and dissemination. We encountered three clinical cases in our hospital during the outbreak period of Mpox in 2023 in Japan. The present study aims to report the largest genomic rearrangement observed to date in one of the clinical isolates and to demonstrate its viability in cell culture. Whole-genome sequencing and digital PCR were used to characterize the viral genomes. Viral isolation, microscopic observation and growth kinetics in Vero cells were performed to confirm viral replication. All three patients were men living with human immunodeficiency virus (HIV) and presented typical Mpox symptoms, such as rash, fever and pustules on the body surfaces, including near the genitals. Virus isolation was successful in all three cases. All viral strains belonged to clade IIb, lineage C.1. Notably, one strain exhibited a large-scale genomic rearrangement: a 5.5 kb deletion at the left variable region replaced by a 30.5 kb inverted sequence, the largest reported in clinical isolates. Despite this extensive genomic change, the strain maintained robust replication capacity and marked fusogenicity <i>in vitro</i>. We report, for the first time in clinical isolates, a massive genomic rearrangement in MPXV that does not impair viral replicability. This finding represents an example of genomic plasticity and provides a rare but noteworthy resource for future studies. Taken together, when performing genomic analyses of MPXV, aberrant genomic rearrangements should also be carefully considered alongside single-base substitutions.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146125321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
HCV infection induces ubiquitin-dependent degradation of LATS1, inactivating the Hippo pathway and upregulating transcription of the CYR61 and CTGF genes. HCV感染诱导LATS1的泛素依赖性降解,使Hippo通路失活,上调CYR61和CTGF基因的转录。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002221
Maria Alethea Septianastiti, Chieko Matsui, Zihan Xu, Fransisca Puspitasari, Dewa Nyoman Murti Adyaksa, Lin Deng, Takayuki Abe, Ikuo Shoji
{"title":"HCV infection induces ubiquitin-dependent degradation of LATS1, inactivating the Hippo pathway and upregulating transcription of the CYR61 and CTGF genes.","authors":"Maria Alethea Septianastiti, Chieko Matsui, Zihan Xu, Fransisca Puspitasari, Dewa Nyoman Murti Adyaksa, Lin Deng, Takayuki Abe, Ikuo Shoji","doi":"10.1099/jgv.0.002221","DOIUrl":"10.1099/jgv.0.002221","url":null,"abstract":"<p><p>Hepatitis C virus (HCV) is often associated with chronic liver diseases and significant alterations in host cellular signalling. However, the molecular mechanisms underlying HCV-related liver pathogenesis remain to be elucidated. The Hippo signalling pathway, a key regulator of cell proliferation and survival, plays a critical role in maintaining liver homeostasis. Here, we investigated the role of the Hippo pathway in HCV-related pathogenesis. We demonstrated that HCV infection induces degradation of LATS1, a key regulator of the Hippo pathway. Degradation of LATS1 protein was restored by a proteasomal inhibitor, but not a lysosome inhibitor, indicating that HCV promotes proteasomal degradation of LATS1 protein. HCV-induced degradation of LATS1 protein was suppressed in si-Itch-transfected Huh-7.5 cells. These results suggest that Itch ubiquitin ligase is involved in ubiquitin-dependent degradation of LATS1 protein. Cell fractionation assays and immunofluorescence staining revealed that HCV infection promoted nuclear translocation of YAP1 protein, suggesting that HCV infection suppresses the Hippo pathway. Furthermore, the transcription of YAP1 target genes, CYR61 and CTGF, that are involved in tissue remodelling and proliferation, was upregulated in HCV-infected Huh-7.5 cells and in HCV-infected patients. Taken together, we propose that HCV promotes the ubiquitin-dependent proteasomal degradation of LATS1 protein, leading to suppression of the Hippo pathway, thereby upregulating transcription of CYR61 and CTGF genes, which may contribute to HCV-related pathogenesis.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12877566/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146125324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ICTV Virus Taxonomy Profile: Nipumfusiviridae 2026. ICTV病毒分类概况:Nipumfusiviridae 2026。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002226
Yimin Ni, Yongjie Wang
{"title":"ICTV Virus Taxonomy Profile: <i>Nipumfusiviridae</i> 2026.","authors":"Yimin Ni, Yongjie Wang","doi":"10.1099/jgv.0.002226","DOIUrl":"10.1099/jgv.0.002226","url":null,"abstract":"<p><p>The family <i>Nipumfusiviridae</i> includes DNA viruses with hosts deduced to be marine ammonia-oxidizing archaea, specifically those in the archaeal family <i>Nitrosopumilaceae</i>. Virus genomes have been discovered through metagenomics of samples from inlets, coastal areas, intertidal zones, epipelagic and oceanic waters, and soil. Viruses have neither been isolated nor enriched through experiments. The family <i>Nipumfusiviridae</i> includes several genera. The virions of nipumfusiviruses are predicted to have spindle-shaped morphology based on the analysis of the deduced structural models of the major capsid protein. Limited information can be provided about translation and replication from the genome. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family <i>Nipumfusiviridae</i>, which is available at ictv.global/report/nipumfusiviridae.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Attenuation mechanisms of the P7-P8 live-attenuated cyvirus cyprinidallo2 vaccine potentially involve apoptosis non-inhibition feature: insights into virus pathogenesis. P7-P8 cyprinidallo2活减毒赛病毒疫苗的衰减机制可能涉及细胞凋亡非抑制特性:对病毒发病机制的见解
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002227
Hiroaki Saito, Yuki Midorikawa, Takumi Okamura, Samuel Mwakisha Mwamburi, Shungo Minami, Manami Yuguchi, Hidehiro Kondo, Megumi Matsumoto, Goshi Kato, Motohiko Sano
{"title":"Attenuation mechanisms of the P7-P8 live-attenuated <i>cyvirus cyprinidallo2</i> vaccine potentially involve apoptosis non-inhibition feature: insights into virus pathogenesis.","authors":"Hiroaki Saito, Yuki Midorikawa, Takumi Okamura, Samuel Mwakisha Mwamburi, Shungo Minami, Manami Yuguchi, Hidehiro Kondo, Megumi Matsumoto, Goshi Kato, Motohiko Sano","doi":"10.1099/jgv.0.002227","DOIUrl":"10.1099/jgv.0.002227","url":null,"abstract":"<p><p><i>Cyvirus cyprinidallo2</i> (CyHV-2) is an alloherpesvirus and the causative agent of herpesviral haematopoietic necrosis in goldfish. Whole-genome sequence comparison of the developed live-attenuated vaccine P7-P8 with virulent CyHV-2 strains revealed seven single-nucleotide polymorphisms, five deletions and one inversion in the ORFs, which may be involved in attenuation. A start codon loss in ORF 113, a putative apoptosis-inhibition gene, was observed in the mutations. <i>In vitro</i> assays indicated that apoptosis-related genes were upregulated in cells inoculated with the vaccine or virulent virus compared to uninfected cells. However, the vaccine group showed increased phosphatidylserine externalization and DNA damage, suggesting the apoptosis-inducing properties of P7-P8. In the <i>in vivo</i> experiment, histopathology demonstrated that vaccinated goldfish exhibited immune responses, such as leucocyte aggregation and melanomacrophage centre formation, without marked degeneration. Gene expression analysis showed upregulation of proinflammatory and granzyme B genes in vaccinated fish. In addition, the vaccine strain triggered apoptosis of the infected cells during the early stage of infection, potentially promoting virus clearance and preventing excessive virus replication. The results show that the P7-P8 potentially induces apoptosis and immune responses, contributing to low virus propagation without tissue damage. This study provides insights into CyHV-2 pathogenesis, suggesting that apoptosis-related genes can be the targets for vaccine development against alloherpesviruses in aquaculture species.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12935156/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147284013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
How a chance finding and high-throughput sequencing helped unmask the probable causal agent of Brazilian curly top, a plant disease that disappeared over 70 years ago. 一个偶然的发现和高通量测序如何帮助揭开了巴西卷毛病可能的致病因子,这种植物疾病在70多年前就消失了。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002188
Juliana Osse de Souza, Tomas A Melgarejo, Monica Alves Macedo, Tarsiane Barbosa, Roberta Nogueira Lima, Carlos Eduardo Silveira Silva, Cristiano Rodrigues, Maher Al Rwahnih, João Roberto Spotti Lopes, Alice Kazuko Inoue-Nagata, Robert L Gilbertson
{"title":"How a chance finding and high-throughput sequencing helped unmask the probable causal agent of Brazilian curly top, a plant disease that disappeared over 70 years ago.","authors":"Juliana Osse de Souza, Tomas A Melgarejo, Monica Alves Macedo, Tarsiane Barbosa, Roberta Nogueira Lima, Carlos Eduardo Silveira Silva, Cristiano Rodrigues, Maher Al Rwahnih, João Roberto Spotti Lopes, Alice Kazuko Inoue-Nagata, Robert L Gilbertson","doi":"10.1099/jgv.0.002188","DOIUrl":"10.1099/jgv.0.002188","url":null,"abstract":"<p><p>Curly top disease (CTD) affects sugar beet, tomato and other crops, resulting in stunted plants with severely curled leaves and reduced yields. The disease occurs worldwide and is caused by geographically associated monopartite geminiviruses transmitted mostly by leafhoppers. However, the aetiology of CTD in South America remains unknown because the disease disappeared in the 1950s. Here, we describe how the chance finding of tomato plants with CTD-like symptoms in Brazil in 2016 and high-throughput sequencing helped identify a novel ~2.6 kb geminivirus DNA associated with curly top disease in Mato Grosso (GV-CTD-MT) that induced CTD symptoms in agroinoculated tomato and <i>Nicotiana benthamiana</i> Domin. plants and produced geminivirus-like virions in infected plants. Evidence GV-CTD-MT may be the genomic DNA of the historic Brazilian curly top virus (BraCTV) includes (i) occurring in the same geographic location (Brazil); (ii) inducing nearly identical CTD symptoms in tobacco (<i>Nicotiana tabacum</i> L.) and tomato plants to those described in the 1940s for the BraCTV; (iii) inducing CTD in a similar broad host range of plant species as previously reported for BraCTV based on leafhopper transmission experiments; (iv) the co-phylogenetic analysis predicting the vector of GV-CTD-MT is <i>Agallia</i> sp. leafhoppers; and, importantly, (v) transmission experiments showing <i>Agallia albidula</i>, the known vector of BraCTV, is a competent vector of GV-CTD-MT. Sequence and phylogenetic analyses revealed that this novel CTD-inducing geminivirus has a chimeric genome, a long evolutionary history, and is closely related to monopartite geminiviruses recently identified in South America. These viruses were placed in the new genus <i>Topilevirus</i>, the fifth genus whose members induce CTD. Thus, our results suggest that BraCTD, which disappeared over 70 years ago, and possibly historic CTDs of sugar beet in South America were caused by topileviruses transmitted by indigenous leafhoppers, thereby solving the conundrum left by first-generation researchers.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146132060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Feline morbillivirus elicits robust neutralizing antibodies in domestic cats without cross-neutralizing activities against canonical morbilliviruses. 猫麻疹病毒在家猫体内引起强大的中和抗体,对典型的麻疹病毒没有交叉中和活性。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002207
Kaede Tashiro, Kiyotaka Konishi, Eun-Sil Park, Ayumu Hyodo, Fumio Seki, Yuki Kitai, Yukiko Akahori, Minglin Ju, Hiroshi Katoh, Takao Segawa, Yuta Shirogane, Takuya Itou, Tetsuya Furuya, Shigeru Morikawa, Makoto Takeda
{"title":"Feline morbillivirus elicits robust neutralizing antibodies in domestic cats without cross-neutralizing activities against canonical morbilliviruses.","authors":"Kaede Tashiro, Kiyotaka Konishi, Eun-Sil Park, Ayumu Hyodo, Fumio Seki, Yuki Kitai, Yukiko Akahori, Minglin Ju, Hiroshi Katoh, Takao Segawa, Yuta Shirogane, Takuya Itou, Tetsuya Furuya, Shigeru Morikawa, Makoto Takeda","doi":"10.1099/jgv.0.002207","DOIUrl":"10.1099/jgv.0.002207","url":null,"abstract":"<p><p>Feline morbillivirus (FeMV), first identified in 2012, is a member of the genus <i>Morbillivirus</i>. Like other morbilliviruses, FeMV utilizes signalling lymphocytic activation molecule (CD150 or SLAMF1) as a cellular receptor; however, it is genetically distinct and notable for its unique tissue tropism, particularly its ability to establish persistent infections in the feline kidney. In this study, we established a plaque assay system using Vero cells stably expressing feline SLAMF1 and quantitatively evaluated neutralizing antibodies against FeMV in the sera of domestic cats. The results showed that FeMV-infected feline sera contained exceptionally high titres of FeMV-specific neutralizing antibodies, often far exceeding those observed in animals infected with other morbilliviruses. Importantly, sera with high neutralizing activity against FeMV exhibited undetectable cross-neutralizing activity against other morbilliviruses. In contrast, significant cross-neutralization was observed among non-FeMV morbilliviruses. These findings indicate that FeMV surface glycoproteins are antigenically distinct, underscoring the immunological uniqueness of FeMV. Moreover, while feline SLAMF1 functions as a receptor for various morbilliviruses, FeMV utilized only feline SLAMF1. These data suggest that the receptor-binding domain of FeMV is uniquely adapted to the feline SLAMF1. This study offers valuable tools and insights for FeMV research, advancing our understanding of its antigenicity and host receptor usage.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146125311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mutant knock-in mice display enhanced susceptibility to pure prion protein fibrils. 突变敲入小鼠对纯朊蛋白原纤维的易感性增强。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002219
Daniel J Walsh, Heidi Standke, Allison Kraus, Joel C Watts, Surachai Supattapone
{"title":"Mutant knock-in mice display enhanced susceptibility to pure prion protein fibrils.","authors":"Daniel J Walsh, Heidi Standke, Allison Kraus, Joel C Watts, Surachai Supattapone","doi":"10.1099/jgv.0.002219","DOIUrl":"10.1099/jgv.0.002219","url":null,"abstract":"<p><p>Prion diseases manifest clinically in three different forms. Sporadic and infectious forms of prion disease are caused by the conversion of WT, cellular prion protein (PrP<sup>C</sup>) into its pathogenic conformer (PrP<sup>Sc</sup>). In contrast, genetic forms of prion diseases are caused by mutations in the PrP sequence that promote mutant PrP<sup>Sc</sup> formation. When reconstituted with either polyanionic or lipid cofactors, purified PrP<sup>C</sup> substrate can be converted <i>in vitro</i> into PrP<sup>Sc</sup> products that display high levels of specific infectivity when inoculated in WT hosts. In contrast, various protein-only PrP<sup>Sc</sup> molecules formed in the absence of cofactors display much lower levels of specific infectivity. Here, we report that protein-only PrP<sup>Sc</sup> molecules with different sequences can induce the formation of proteinase K-resistant PrP<sup>Sc</sup> molecules and spongiform degeneration in the brains of knock-in mice expressing PrP harbouring the pathogenic E200K mutation, but not in hosts expressing WT PrP. These results indicate that the E200K mutation enhances host susceptibility to various protein-only PrP<sup>Sc</sup> fibrils, suggesting fundamental differences in the replication mechanisms of WT versus mutant prions.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12877565/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146125340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
No longer uncertain: the validation of tenebrionid insects as hosts of Blattambidensovirus incertum1 isolates by phylogeny and infection studies. 不再是不确定的:通过系统发育和感染研究证实拟甲虫属昆虫是布氏绦虫病毒分离株的宿主。
IF 4.3 4区 医学
Journal of General Virology Pub Date : 2026-02-01 DOI: 10.1099/jgv.0.002211
Fang Shiang Lim, Joel González-Cabrera, Johannes A Jehle, Thomas Lefebvre, Jörg T Wennmann
{"title":"No longer uncertain: the validation of tenebrionid insects as hosts of <i>Blattambidensovirus incertum1</i> isolates by phylogeny and infection studies.","authors":"Fang Shiang Lim, Joel González-Cabrera, Johannes A Jehle, Thomas Lefebvre, Jörg T Wennmann","doi":"10.1099/jgv.0.002211","DOIUrl":"10.1099/jgv.0.002211","url":null,"abstract":"<p><p>The mealworm (<i>Tenebrio molitor</i>) is one of the most commonly mass-reared insects for food and feed. Monitoring the health status of commercially reared mealworm populations is of great importance for the early detection of entomopathogens and for preventing pathogen outbreaks. Metagenomic screening is a suitable and commonly used method for detecting entomopathogens. The approach used here previously enabled the discovery of the Tenebrio molitor densovirus (TmDV) (family <i>Parvoviridae</i>, subfamily <i>Densovirinae</i>) in symptomatic larvae. In the present study, the search for TmDV was extended to larvae, pupae and adults of <i>T. molitor,</i> including 19 symptomatic and asymptomatic samples obtained from a commercial mealworm mass-rearing facility. The presence of TmDV in all life stages of <i>T. molitor</i> was demonstrated, and its relative abundance was quantified using Nanopore sequencing. The infectivity of TmDV to <i>T. molitor</i> was demonstrated by isolating viral particles from sample LD2 and feeding them to mealworms. The experiment confirmed <i>T. molitor</i> as a susceptible host but showed a rather asymptomatic course of the infection with little effect on larval growth during 56 days of observation. It is hypothesized that this largely covert infection may explain the lack of reports of TmDV in mealworms or other insects, despite its detection in metagenomics surveillance studies of various insectivorous vertebrates. The complete genomes of 15 different TmDV genotypes present in various ratios in the different life stages of <i>T. molitor</i> could be reconstructed. Including these genotype sequences in phylogenetic analyses allowed us to re-evaluate the relationship and diversity of previously reported TmDV and related isolates, all belonging to the species <i>Blattambidensovirus incertum1</i>. Our findings suggest that <i>T. molitor</i> and possibly other insects are susceptible hosts of viruses of <i>Blattambidensovirus incertum1,</i> while its occasional detection in metagenomic datasets of insectivorous vertebrates may not represent true densovirus host associations.</p>","PeriodicalId":15880,"journal":{"name":"Journal of General Virology","volume":"107 2","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12890311/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146157411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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