Infection and Immunity最新文献

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Biofilm-associated molecular patterns: BAMPs. 生物膜相关分子模式:BAMPs。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-10-14 Epub Date: 2025-08-21 DOI: 10.1128/iai.00304-25
Peter Østrup Jensen, Morten Rybtke, Tim Tolker-Nielsen
{"title":"Biofilm-associated molecular patterns: BAMPs.","authors":"Peter Østrup Jensen, Morten Rybtke, Tim Tolker-Nielsen","doi":"10.1128/iai.00304-25","DOIUrl":"10.1128/iai.00304-25","url":null,"abstract":"<p><p>Chronic infections involving bacterial biofilms are a major clinical challenge due to the ability of biofilm to resist antimicrobial treatments and host immune responses. The resulting persistent infections are often accompanied by collateral damage mainly executed by activated components of the innate immune system in response to the infectious biofilm. The innate immune system responds to the recognition of pathogen-associated molecular patterns (PAMPs), which are broadly expressed by both planktonic and biofilm-forming bacteria. However, the expression of special PAMPs in association with biofilms remains poorly defined. Here, we review prior studies that provide experimental evidence of the existence of immune-activating molecular patterns that are expressed at immunostimulatory levels in biofilms but not in planktonic bacteria. Accordingly, we introduce the concept of biofilm-associated molecular patterns (BAMPs) as a subset of PAMPs that are expressed in biofilms. Identifying BAMPs and elucidating their role in innate immune activation may inform the development of targeted therapies to reduce collateral tissue damage in biofilm-associated infections.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0030425"},"PeriodicalIF":2.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12519799/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144952672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Timely excision of prophage Φ13 is essential for the Staphylococcus aureus infectious process. 及时切除原噬菌体Φ13对金黄色葡萄球菌感染过程至关重要。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-10-14 Epub Date: 2025-09-03 DOI: 10.1128/iai.00314-25
Olivier Poupel, Gérald Kenanian, Lhousseine Touqui, Charlotte Abrial, Tarek Msadek, Sarah Dubrac
{"title":"Timely excision of prophage Φ13 is essential for the <i>Staphylococcus aureus</i> infectious process.","authors":"Olivier Poupel, Gérald Kenanian, Lhousseine Touqui, Charlotte Abrial, Tarek Msadek, Sarah Dubrac","doi":"10.1128/iai.00314-25","DOIUrl":"10.1128/iai.00314-25","url":null,"abstract":"<p><p>Mobile genetic elements play an essential part in the infectious process of major pathogens, yet the role of prophage dynamics in <i>Staphylococcus aureus</i> pathogenesis is still not well understood. Here, we studied the impact of the Φ13 <i>hlb-</i>converting prophage, whose integration inactivates the <i>hlb</i> β-toxin gene, on staphylococcal pathogenesis. We showed that prophage Φ13 is lost in approximately half the bacterial population during the course of infection. Inactivation of the Φ13 <i>int</i> recombinase gene, essential for insertion/excision, locked the prophage in the bacterial chromosome, leading to a significant loss of virulence in a murine systemic infection model. In contrast, the non-lysogen strain (ΔΦ13), where the <i>hlb</i> beta-hemolysin gene is reconstituted, displayed strongly increased virulence. Accordingly, histopathological analyses revealed more severe nephritis in mice infected with bacteria lacking prophage Φ13 (ΔΦ13), compared to infection with the parental strain. Infection with the ∆<i>int</i> mutant, where beta-hemolysin production is abolished, led to the least severe renal lesions. Cytokine induction in a human neutrophil model showed significantly increased IL-6 expression following infection with the beta-hemolysin producing strain (ΔΦ13). Our results indicate that timely <i>in vivo</i> excision of the Φ13 prophage is essential for progression of the <i>S. aureus</i> infectious process: early excision leads to rapid host death, whereas the inability to excise the prophage significantly reduces staphylococcal virulence.IMPORTANCEThis study highlights prophage Φ13 excision as a critical factor in <i>Staphylococcus aureus</i> pathogenesis, influencing infection outcomes by balancing rapid host killing with reduced bacterial virulence. This mechanism may represent a bet-hedging strategy in genetic regulation, resulting in a mixed bacterial population capable of rapidly switching between two processes: bacterial colonization and host damage. Unraveling this dynamic opens new possibilities for developing targeted therapies to disrupt or modulate prophage activity, offering a novel approach to mitigating <i>S. aureus</i> infections.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0031425"},"PeriodicalIF":2.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12519783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144952690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Red-eared slider turtle-Mycobacterium marinum infection model. 红耳龟-海洋分枝杆菌感染模型。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-10-07 DOI: 10.1128/iai.00315-25
Longlong Wang, Jijie Jiang, Mengke Hou, Zhe Wang
{"title":"Red-eared slider turtle<i>-Mycobacterium marinum</i> infection model.","authors":"Longlong Wang, Jijie Jiang, Mengke Hou, Zhe Wang","doi":"10.1128/iai.00315-25","DOIUrl":"https://doi.org/10.1128/iai.00315-25","url":null,"abstract":"<p><p><i>Mycobacterium marinum</i> serves as an ideal model organism for studying tuberculosis due to its genetic similarity to <i>Mycobacterium tuberculosis</i>. However, there is a need for more suitable animal models to study <i>M. marinum</i> infections. In this study, we established a novel infection model using red-eared slider turtles (<i>Trachemys scripta elegans</i>). The turtles were infected with <i>M. marinum</i> via subcutaneous injection in the hind limb. Inoculation with >10<sup>6</sup> CFU of <i>M. marinum</i> resulted in acute infection, causing mortality in at least 80% of turtles within five weeks, whereas 10<sup>5</sup> CFU caused only 10% mortality. In subacute infections, <i>M. marinum</i> colonized and proliferated in various tissues for at least four weeks, with higher bacterial loads observed in the spleen and liver compared to the heart and lungs. Granuloma formation in the liver was correlated positively with bacterial load. Knockdown of adenylate kinase (ADK) in <i>M. marinum</i> reduced bacterial load by one order of magnitude in the liver and by half in the spleen, suggesting ADK as a potential drug target. Treatment with amikacin and moxifloxacin reduced bacterial load by approximately one order of magnitude in the liver and by half in the spleen. The red-eared slider turtle<i>-M. marinum</i> infection model developed in this study provides a robust tool for tuberculosis research.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0031525"},"PeriodicalIF":2.8,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145238577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Induced necroptosis limits Toxoplasma gondii replication in a RIPK3/MLKL-dependent manner. 诱导的坏死下垂以RIPK3/ mlkl依赖的方式限制了弓形虫的复制。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-10-07 DOI: 10.1128/iai.00479-25
Billy J Erazo, Laura J Knoll
{"title":"Induced necroptosis limits <i>Toxoplasma gondii</i> replication in a RIPK3/MLKL-dependent manner.","authors":"Billy J Erazo, Laura J Knoll","doi":"10.1128/iai.00479-25","DOIUrl":"https://doi.org/10.1128/iai.00479-25","url":null,"abstract":"<p><p><i>Toxoplasma gondii</i> is an obligate intracellular parasite capable of subverting host defenses to establish infection. Necroptosis, a lytic pro-inflammatory form of programed cell death, has emerged as a host defense mechanism against intracellular pathogens. However, its relevance in controlling <i>T. gondii</i> replication remains unclear. Here, we investigated the role of necroptosis in limiting <i>T. gondii</i> replication using bone marrow-derived macrophages (BMDMs) deficient in key necroptotic mediators, RIPK3 and MLKL. We demonstrate that under naïve conditions, <i>T. gondii</i> replication proceeds unimpeded in RIPK3<sup>-/-</sup> and MLKL<sup>-/-</sup> BMDMs. However, co-treatment with TNF-α and the pan-caspase inhibitor Z-VAD-FMK, conditions that promote necroptosis, significantly reduced parasite replication in wild-type BMDMs but not in those lacking RIPK3 or MLKL. This suppression was dependent on RIPK1 activity, as pharmacological inhibition with Necrostatin-1 abrogated the effect. We further confirmed that TNF-α and Z-VAD-FMK treatment induced necroptotic cell death characterized by loss of plasma membrane integrity, both of which were absent in RIPK3<sup>-/-</sup> and MLKL<sup>-/-</sup> cells. These findings establish that the activation of necroptosis can effectively limit <i>T. gondii</i> replication in BMDMs and underscore the importance of RIPK1-RIPK3-MLKL signaling in mounting a cell-intrinsic immune defense. Our study provides new insight into the functional capacity of necroptosis in restricting intracellular parasites and highlights its potential as a therapeutic target in toxoplasmosis.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0047925"},"PeriodicalIF":2.8,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145238584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Cervicovaginal microbial features predict Chlamydia trachomatis spread to the upper genital tract of infected women. 宫颈阴道微生物特征预测沙眼衣原体传播到感染妇女的上生殖道。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-08-12 DOI: 10.1128/iai.00057-25
Sangmi Jeong, Tammy Tollison, Hayden Brochu, Hsuan Chou, Ian Huntress, Kacy S Yount, Xiaojing Zheng, Toni Darville, Catherine M O'Connell, Xinxia Peng
{"title":"Cervicovaginal microbial features predict <i>Chlamydia trachomatis</i> spread to the upper genital tract of infected women.","authors":"Sangmi Jeong, Tammy Tollison, Hayden Brochu, Hsuan Chou, Ian Huntress, Kacy S Yount, Xiaojing Zheng, Toni Darville, Catherine M O'Connell, Xinxia Peng","doi":"10.1128/iai.00057-25","DOIUrl":"10.1128/iai.00057-25","url":null,"abstract":"<p><p><i>Chlamydia trachomatis</i> (CT) infection can lead to pelvic inflammatory disease, infertility, and other reproductive sequelae when it ascends to the upper genital tract. Factors including chlamydial burden, coinfection with other sexually transmitted bacterial pathogens, and oral contraceptive use influence risk for upper genital tract spread. Cervicovaginal microbiome composition influences CT susceptibility, and we investigated if it contributes to spread by analyzing amplicon sequence variants (ASVs) derived from the V4 region of 16S rRNA genes in vaginal samples collected from women at high risk for CT infection and for whom endometrial infection had been determined. Participants were classified as CT negative (CT-, <i>n</i> = 70), CT positive at the cervix (Endo-, <i>n</i> = 79), or CT positive at both cervix and endometrium (Endo+, <i>n</i> = 68). Although we were unable to identify many significant differences between CT-infected and -uninfected women, differences in abundance of ASVs representing <i>Lactobacillus iners</i> and <i>Lactobacillus crispatus</i> subspecies but not dominant lactobacilli were detected. Thirteen informative ASVs predicted endometrial chlamydial infection (area under the curve = 0.72), with CT ASV abundance emerging as a key predictor. We also observed a positive correlation between levels of cervically secreted cytokines previously associated with CT ascension and abundance of the informative ASVs. Our findings suggest that vaginal microbial community members may influence chlamydial spread directly by nutrient limitation and/or disrupting endocervical epithelial integrity and indirectly by modulating proinflammatory signaling and/or homeostasis of adaptive immunity. Further investigation of these predictive microbial factors may lead to cervicovaginal microbiome biomarkers useful for identifying women at increased risk for disease.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0005725"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418748/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144821288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Consequences of host-microbiome interactions in preterm infants. 早产儿中宿主-微生物相互作用的后果。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-08-11 DOI: 10.1128/iai.00501-24
Isabel Erickson, Jessica Tung, Drew J Schwartz
{"title":"Consequences of host-microbiome interactions in preterm infants.","authors":"Isabel Erickson, Jessica Tung, Drew J Schwartz","doi":"10.1128/iai.00501-24","DOIUrl":"10.1128/iai.00501-24","url":null,"abstract":"<p><p>Preterm infants are highly susceptible to bacterial infections and inflammatory diseases. These vulnerabilities arise from disruptions in gut microbiome structure and function, immune system immaturity, and underdeveloped organ systems. In this review, we explore the role of the gut microbiome in neonatal health. With a specific focus on preterm infants, we outline how microbiome disruption contributes to negative clinical outcomes. First, we provide an overview of infant gut microbiome development, highlighting key factors that influence its trajectory. Next, we examine the interplay between the infant gut microbiome and the development of systemic and intestinal immune systems, with emphasis on how microbiome perturbations related to preterm birth alter host-microbiome interactions and the overall immune landscape. We then discuss the role of altered gut composition in disease states common to preterm infants, such as sepsis, bacterial infections, and necrotizing enterocolitis. Finally, we discuss current and future diagnostics and treatments and offer our perspective on future research to untangle the host-microbiome interface in early life.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0050124"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418762/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144816551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Cross-species protection suggests Entamoeba histolytica trogocytosis enables complement resistance through the transfer of negative regulators of complement activation. 跨物种保护表明,溶组织内阿米巴原虫的巨噬细胞病通过补体激活负调节因子的转移使补体抵抗。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-07-31 DOI: 10.1128/iai.00220-25
Maura C Ruyechan, Wesley Huang, Katherine S Ralston
{"title":"Cross-species protection suggests <i>Entamoeba histolytica</i> trogocytosis enables complement resistance through the transfer of negative regulators of complement activation.","authors":"Maura C Ruyechan, Wesley Huang, Katherine S Ralston","doi":"10.1128/iai.00220-25","DOIUrl":"10.1128/iai.00220-25","url":null,"abstract":"<p><p><i>Entamoeba histolytica</i> is a major cause of diarrheal disease. <i>E. histolytica</i> trophozoites (\"amoebae\") can invade the intestine and disseminate via the bloodstream, resisting complement lysis through unknown mechanisms. Amoebae kill human cells by performing trogocytosis. After performing trogocytosis, amoebae display human proteins on their own surface and are resistant to lysis by human serum. In this study, we sought to further evaluate the mechanism by which amoebae resist complement lysis. To test if complement is responsible for lysis of amoebae, C3-depleted serum was compared to replete serum, and C3 was indeed required for lysis. Amoebae were allowed to perform trogocytosis of human cells and exposed to mouse serum. Although they had performed trogocytosis on a different species than the source of the serum, they were protected from lysis. To test if the protection from lysis by mouse serum was due to the functional interchangeability of human and mouse complement pathway proteins, human CD46 or CD55 (negative regulators of complement activation) were exogenously expressed. Amoebae that expressed human CD46 or CD55 were protected from lysis by mouse serum, indicating that display of human proteins was sufficient to inhibit mouse complement activation. Finally, amoebae were allowed to perform trogocytosis of a cell type in which the complement pathway is not conserved, and they did not become resistant to lysis. Overall, these findings are consistent with the model that trogocytosis enables amoebic acquisition and display of host proteins, including negative regulators of the complement pathway, that provide protection from complement lysis. Since other microbes can perform trogocytosis, this novel mechanism for complement resistance might apply to other infections.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0022025"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418739/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144753226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Strain-specific variation in the complement resistome of Pseudomonas aeruginosa. 铜绿假单胞菌补体抵抗组的菌株特异性变异。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-08-11 DOI: 10.1128/iai.00055-25
Manon Janet-Maitre, Mylène Robert-Genthon, François Cretin, Sylvie Elsen, Ina Attrée
{"title":"Strain-specific variation in the complement resistome of <i>Pseudomonas aeruginosa</i>.","authors":"Manon Janet-Maitre, Mylène Robert-Genthon, François Cretin, Sylvie Elsen, Ina Attrée","doi":"10.1128/iai.00055-25","DOIUrl":"10.1128/iai.00055-25","url":null,"abstract":"<p><p>Bloodstream infections caused by <i>Pseudomonas aeruginosa</i> are associated with high mortality rates. The complement system, a key component of the innate immune response, plays a major role in eliminating <i>P. aeruginosa</i> from human blood. However, the sensitivity of <i>P. aeruginosa</i> strains to plasma varies widely, ranging from highly sensitive to persistent or fully resistant. Although most studies use model strains, the species genomic and phenotypic diversities suggest more complex interactions with complement than previously appreciated. In this study, we characterized the plasma resistome of <i>P. aeruginosa</i> using Tn-seq in three strains with varying levels of plasma sensitivity. A gain-of-function screen in the plasma-sensitive strain PA14 revealed numerous bacterial factors influencing plasma resistance, including components of the RetS-LadS/Gac/Rsm regulatory pathway and outer membrane porins. In the plasma-resistant strains CHA and YIK, Tn-seq analysis indicated that each strain relies on a distinct, limited set of proteins to evade complement-mediated killing. Despite these differences, we identified common mechanisms across all three strains. These include the production of exopolysaccharides (EPSs), the presence of surface appendages, and modifications in the O-specific antigen. Notably, we identified Ssg and Crc as shared contributors to plasma resistance. Although deletion mutants lacking <i>ssg</i> and/or <i>crc</i> exhibited reduced survival in plasma, a subpopulation of these mutants was able to persist during prolonged exposure. Overall, this work provides new insights into the complex interplay between <i>P. aeruginosa</i> and the human complement system in the context of bloodstream infections and raises concerns regarding the efficacy of therapies that target individual virulence factors.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0005525"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418747/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144816490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Guanylate-binding protein 5: a promising biomarker and therapeutic target. 鸟苷酸结合蛋白5:一个有前景的生物标志物和治疗靶点。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-08-11 DOI: 10.1128/iai.00026-25
Jianliang Lu, Wei Wang
{"title":"Guanylate-binding protein 5: a promising biomarker and therapeutic target.","authors":"Jianliang Lu, Wei Wang","doi":"10.1128/iai.00026-25","DOIUrl":"10.1128/iai.00026-25","url":null,"abstract":"<p><p>The guanylate-binding protein (GBP) family, a group of interferon-induced GTPases, is pivotal in pathogen defense, inflammation regulation, and tumor immunity. Among them, GBP5 has emerged as a key player due to its distinctive roles in various diseases. However, existing studies reveal significant gaps, particularly regarding its expression, regulatory mechanisms, and functional dynamics across diverse diseases and patient populations, limiting its reliability as a biomarker or therapeutic target. This review provides a comprehensive synthesis of GBP5 functions across infectious diseases, cancer, immune disorders, and inflammation, with dedicated analysis of its context-dependent functional variability in distinct immune landscapes, genetic backgrounds, and disease progression stages. This systematic evaluation provides a critical foundation for future research, highlighting GBP5's promise as both a biomarker and therapeutic target in precision medicine.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0002625"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418754/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144816488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Tick-borne coinfections modulate CD8+ T cell response and progressive leishmaniosis. 蜱传共感染调节CD8+ T细胞反应和进行性利什曼病。
IF 2.8 3区 医学
Infection and Immunity Pub Date : 2025-09-09 Epub Date: 2025-07-31 DOI: 10.1128/iai.00182-25
Breanna M Scorza, Danielle Pessôa-Pereira, Felix Pabon-Rodriguez, Erin A Beasley, Kurayi Mahachi, Arin D Cox, Eric Kontowicz, Tyler Baccam, Geneva Wilson, Max C Waugh, Shelbe Vollmer, Angela Toepp, Kavya Raju, Ogechukwu C Chigbo, Jonah Elliff, Greta Becker, Karen I Cyndari, Serena Tang, Grant Brown, Christine A Petersen
{"title":"Tick-borne coinfections modulate CD8<sup>+</sup> T cell response and progressive leishmaniosis.","authors":"Breanna M Scorza, Danielle Pessôa-Pereira, Felix Pabon-Rodriguez, Erin A Beasley, Kurayi Mahachi, Arin D Cox, Eric Kontowicz, Tyler Baccam, Geneva Wilson, Max C Waugh, Shelbe Vollmer, Angela Toepp, Kavya Raju, Ogechukwu C Chigbo, Jonah Elliff, Greta Becker, Karen I Cyndari, Serena Tang, Grant Brown, Christine A Petersen","doi":"10.1128/iai.00182-25","DOIUrl":"10.1128/iai.00182-25","url":null,"abstract":"<p><p><i>Leishmania infantum</i> causes human visceral leishmaniasis and leishmaniosis (CanL) in reservoir host, dogs. As infection progresses to disease in both humans and dogs, there is a shift from controlling type 1 immunity to a regulatory, exhausted T cell phenotype. In endemic areas, the association between tick-borne coinfections (TBCs) and <i>Leishmania</i> diagnosis and/or clinical severity has been demonstrated. To identify immune factors correlating with disease progression, we prospectively evaluated a cohort of <i>L. infantum</i>-infected dogs from 2019 to 2022. The cohort was TBC-negative with asymptomatic leishmaniosis at the time of enrollment. We measured TBC serology, anti-<i>Leishmania</i> antigen T cell immunity, CanL serological response, parasitemia, and disease severity to probe how nascent TBC perturbs the immune state. At the conclusion, TBC+ dogs with CanL experienced greater increases in anti-<i>Leishmania</i> antibody reactivity and parasite burden compared to dogs that did not have incident TBC during the study. TBC+ dogs were twice as likely to experience moderate (LeishVet stage 2) or severe/terminal disease (LeishVet stage 3/4). Prolonged exposure to TBC was associated with a shift in <i>Leishmania</i> antigen-induced interferon gamma (IFN-γ)/interleukin-10 (IL-10) and enhanced CD8 T cell proliferation. Frequency of proliferating CD8 T cells significantly correlated with parasitemia and antibody reactivity. TBC exacerbated parasite burden and immune exhaustion. These findings highlight the need for combined vector control efforts as prevention programs for dogs in <i>Leishmania</i> endemic areas to reduce transmission to humans. Public health education efforts should aim to increase awareness of the connection between TBC and leishmaniosis.</p>","PeriodicalId":13541,"journal":{"name":"Infection and Immunity","volume":" ","pages":"e0018225"},"PeriodicalIF":2.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12418745/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144753228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
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