Journal of Innate Immunity最新文献

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The role of Ficolins in Lung Injury. Ficolins 在肺损伤中的作用
IF 4.7 3区 医学
Journal of Innate Immunity Pub Date : 2024-08-19 DOI: 10.1159/000540954
Meiyun Zhao, Xiaowu Tan, Xu Wu
{"title":"The role of Ficolins in Lung Injury.","authors":"Meiyun Zhao, Xiaowu Tan, Xu Wu","doi":"10.1159/000540954","DOIUrl":"https://doi.org/10.1159/000540954","url":null,"abstract":"<p><strong>Background: </strong>Respiratory diseases seriously threaten human health worldwide, and lung injury is an important component of respiratory disease. Complement activation is an important function of the innate immune system. Complement activation helps the body defend against invasion by external microorganisms, whereas excessive complement activation can exacerbate tissue damage or lead to unwanted side effects. Ficolins are a class of immune-related proteins in the lectin pathway that play important roles in the body's immune defense. Although individual ficolins are not well understood, current information suggests that ficolins may play an important regulatory role in lung injury.</p><p><strong>Summary: </strong>Several studies have shown that ficolins are involved in the immune response in the lung, particularly in the response to infectious and inflammatory processes.</p><p><strong>Key messages: </strong>This review summarizes the role of ficolins in lung injury. Ficolins may influence the development and repair of lung injury by recognizing and binding pathogenic microorganisms, modulating the inflammatory response and promoting the clearance of immune cells. In addition, ficolins are associated with the development and progression of lung diseases (such as pneumonia and ARDS) and may have an important impact on the pathophysiological processes of inflammatory diseases.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006268","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
Stat3 regulates developmental hematopoiesis and impacts myeloid cell function via canonical and non-canonical modalities. Stat3 通过规范和非规范模式调节造血发育并影响髓系细胞功能。
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-04-20 DOI: 10.1159/000538364
M. L. Sobah, Clifford Liongue, Alister C Ward
{"title":"Stat3 regulates developmental hematopoiesis and impacts myeloid cell function via canonical and non-canonical modalities.","authors":"M. L. Sobah, Clifford Liongue, Alister C Ward","doi":"10.1159/000538364","DOIUrl":"https://doi.org/10.1159/000538364","url":null,"abstract":"Signal transducer and activator of transcription (STAT) 3 is extensively involved in the development, homeostasis and function of immune cells, with STAT3 disruption associated with human immune-related disorders. These roles have been assumed to be due to its canonical mode of action as an inducible transcription factor downstream of multiple cytokines, although alternative non-canonical functional modalities have also been described for STAT3. To further understand the roles of STAT3 gained from lineage-specific mouse knockouts, CRISPR/Cas9 was used to generate mutants of the conserved zebrafish Stat3 protein: a loss of function knockout (KO) mutant and a mutant lacking C-terminal sequences including the transactivation domain (ΔTAD). Analysis of the KO mutant identified conserved roles for Stat3 within hematopoietic stem cells impacting the development of all lineages throughout primitive and early definitive hematopoiesis, with altered immune cell populations in juveniles. The Stat3 KO mutant was unable to respond to lipopolysaccharide (LPS) or granulocyte colony-stimulating factor (G-CSF), and also exhibited significantly diminished neutrophil migration that correlated with abrogation of the Cxcl8b/Cxcr2 pathway. Many of these phenotypes were not shared by the Stat3 ΔTAD mutant. Indeed, only neutrophil and macrophage development were disrupted in these mutants with neutrophil migration actually increased, while responsiveness to LPS and G-CSF was maintained. This suggests that Stat3 participates in innate immune cell development and function through both canonical and non-canonical modalities, providing additional insights for relevant diseases.","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140681473","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
Hydrogen peroxide is responsible for the cytotoxic effects of Streptococcus pneumoniae on primary microglia in the absence of pneumolysin. 在没有肺炎溶素的情况下,过氧化氢是肺炎链球菌对初级小胶质细胞产生细胞毒性作用的原因。
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-04-03 DOI: 10.1159/000536514
Franziska Jennert, D. Schaaf, Roland Nau, Thomas P. Kohler, Sven Hammerschmidt, Darius Häusler, Peter Valentin-Weigand, Jana Seele
{"title":"Hydrogen peroxide is responsible for the cytotoxic effects of Streptococcus pneumoniae on primary microglia in the absence of pneumolysin.","authors":"Franziska Jennert, D. Schaaf, Roland Nau, Thomas P. Kohler, Sven Hammerschmidt, Darius Häusler, Peter Valentin-Weigand, Jana Seele","doi":"10.1159/000536514","DOIUrl":"https://doi.org/10.1159/000536514","url":null,"abstract":"INTRODUCTION\u0000Streptococcus pneumoniae is the most common cause of bacterial meningitis and meningoencephalitis in humans. The bacterium produces numerous virulence determinants, among them hydrogen peroxide (H2O2) and pneumolysin (Ply), which contribute to bacterial cytotoxicity. Microglia, the resident phagocytes in the brain, are distinct from other macrophages, and we thus compared their susceptibility to pneumococcal toxicity and their ability to phagocytose pneumococci with those of bone marrow-derived macrophages (BMDM).\u0000\u0000\u0000METHODS\u0000Microglia and BMDM were co-incubated with S. pneumoniae D39 to analyze survival of phagocytes by fluorescence microscopy, bacterial growth by quantitative plating, and phagocytosis by an antibiotic protection assay. Ply was detected by hemolysis assay and Western blot analysis.\u0000\u0000\u0000RESULTS\u0000We found that microglia were killed during pneumococcal infection with a wild-type and an isogenic ply-deficient mutant, whereas viability of BMDM was not affected by pneumococci. Treatment with recombinant Ply showed a dose-dependent cytotoxic effect on microglia and BMDM. However, high concentrations of recombinant Ply were required and under the chosen experimental conditions, Ply was not detectable in the supernatant during infection of microglia. Inactivation of H2O2 by exogenously added catalase abolished its cytotoxic effect. Consequently, infection of microglia with pneumococci deficient for the pyruvate oxidase SpxB, primarily producing H2O2, resulted in reduced killing of microglia.\u0000\u0000\u0000CONCLUSION\u0000Taken together, in the absence of Ply, H2O2 caused cell death in primary phagocytes in concentrations produced by pneumococci.","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140746924","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
Lipoteichoic Acids Are Essential for Pneumococcal Colonization and Membrane Integrity. 脂联素酸对肺炎球菌的定植和膜完整性至关重要。
IF 4.7 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-06-20 DOI: 10.1159/000539934
Max Brendel, Thomas P Kohler, Janine V Neufend, Astrid Puppe, Nicolas Gisch, Sven Hammerschmidt
{"title":"Lipoteichoic Acids Are Essential for Pneumococcal Colonization and Membrane Integrity.","authors":"Max Brendel, Thomas P Kohler, Janine V Neufend, Astrid Puppe, Nicolas Gisch, Sven Hammerschmidt","doi":"10.1159/000539934","DOIUrl":"10.1159/000539934","url":null,"abstract":"<p><strong>Introduction: </strong>The hydrophilic, polymeric chain of the lipoteichoic acid (LTA) of the Gram-positive pathobiont Streptococcus pneumoniae is covalently linked to the glycosylglycerolipid α-<sc>d</sc>-glucopyranosyl-(1,3)-diacylglycerol by the LTA ligase TacL, leading to its fixation in the cytoplasmic membrane. Pneumococcal LTA, sharing identical repeating units with the wall teichoic acids (WTA), is dispensable for normal growth but required for full virulence in invasive infections.</p><p><strong>Methods: </strong>Mutants deficient in TacL and complemented strains constructed were tested for their growth, resistance against oxidative stress, and susceptibility against antimicrobial peptides. Further, the membrane fluidity of pneumococci, their capability to adhere to lung epithelial cells, and virulence in a Galleria mellonella as well as intranasal mouse infection model were assessed.</p><p><strong>Results: </strong>In the present study, we indicate that LTA is already indispensable for pneumococcal adherence to human nasopharyngeal cells and colonization in an intranasal mouse infection model. Mutants deficient for TacL did not show morphological defects. However, our analysis of pneumococcal membranes in different serotypes showed an altered membrane fluidity and surface protein abundance of lipoproteins in mutants deficient for LTA but not WTA. These mutants had a decreased membrane fluidity, exhibited higher amounts of lipoproteins, and showed an increased susceptibility to antimicrobial peptides. In complemented mutant strains, this defect was fully restored.</p><p><strong>Conclusion: </strong>Taken together, LTA is crucial for colonization and required to effectively protect pneumococci from innate immune defence mechanisms by maintaining the membrane integrity.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11324232/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141432111","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
The Role of Neutrophil in COVID-19: Positive or Negative. 中性粒细胞在 COVID-19 中的作用--积极还是消极?
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-01-15 DOI: 10.1159/000535541
Na Rong, Xiaohui Wei, Jiangning Liu
{"title":"The Role of Neutrophil in COVID-19: Positive or Negative.","authors":"Na Rong, Xiaohui Wei, Jiangning Liu","doi":"10.1159/000535541","DOIUrl":"10.1159/000535541","url":null,"abstract":"<p><strong>Background: </strong>Neutrophils are the first line of defense against pathogens. They are divided into multiple subpopulations during development and kill pathogens through various mechanisms. Neutrophils are considered one of the markers of severe COVID-19.</p><p><strong>Summary: </strong>In-depth research has revealed that neutrophil subpopulations have multiple complex functions. Different subsets of neutrophils play an important role in the progression of COVID-19.</p><p><strong>Key messages: </strong>In this review, we provide a detailed overview of the developmental processes of neutrophils at different stages and their recruitment and activation after SARS-CoV-2 infection, aiming to elucidate the changes in neutrophil subpopulations, characteristics, and functions after infection and provide a reference for mechanistic research on neutrophil subpopulations in the context of SARS-CoV-2 infection. In addition, we have also summarized research progress on potential targeted drugs for neutrophil immunotherapy, hoping to provide information that aids the development of therapeutic drugs for the clinical treatment of critically ill COVID-19 patients.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10861219/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139472323","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
TLR10: An Intriguing Toll-Like Receptor with Many Unanswered Questions. TLR10:一个有趣的 Toll 样受体,有许多未解之谜。
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-01-19 DOI: 10.1159/000535523
Carolina Rego Rodrigues, Yadu Balachandran, Gurpreet Kaur Aulakh, Baljit Singh
{"title":"TLR10: An Intriguing Toll-Like Receptor with Many Unanswered Questions.","authors":"Carolina Rego Rodrigues, Yadu Balachandran, Gurpreet Kaur Aulakh, Baljit Singh","doi":"10.1159/000535523","DOIUrl":"10.1159/000535523","url":null,"abstract":"<p><strong>Background: </strong>Toll-like receptors (TLRs) are one of the first pattern recognition receptors found in the innate immune system. The TLR family has 12 members (TLR1-TLR9, TLR11-TLR13) in mice and 10 members (TLR1-TLR10) in humans, with TLR10 being the latest identified.</p><p><strong>Summary: </strong>Considerable research has been performed on TLRs; however, TLR10 is known as an orphan receptor for the lack of information on its signalling, role, and ligands. Even though there are recent studies pointing towards the potential TLR10 ligands, their function and signalling pathway are yet to be determined.</p><p><strong>Key messages: </strong>This review gives an insight into recent findings on TLR10's pro- and anti-inflammatory properties, with the goal of outlining existing results and indicating future research topics on this receptor.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10861218/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139512730","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
Type I Interferon, Induced by Adenovirus or Adenoviral Vector Infection, Regulates the Cytokine Response to Lipopolysaccharide in a Macrophage Type-Specific Manner. 由腺病毒或腺病毒载体感染诱导的 I 型干扰素以巨噬细胞类型特异性的方式调节细胞因子对 LPS 的反应。
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-03-25 DOI: 10.1159/000538282
Mareike D Maler, Sophie Zwick, Carsten Kallfass, Peggy Engelhard, Hexin Shi, Laura Hellig, Pang Zhengyang, Annika Hardt, Gernot Zissel, Zsolt Ruzsics, Willi Jahnen-Dechent, Stefan F Martin, Peter Jess Nielsen, Daiana Stolz, Justyna Lopatecka, Sarah Bastyans, Bruce Beutler, Wolfgang W Schamel, György Fejer, Marina Alexandra Freudenberg
{"title":"Type I Interferon, Induced by Adenovirus or Adenoviral Vector Infection, Regulates the Cytokine Response to Lipopolysaccharide in a Macrophage Type-Specific Manner.","authors":"Mareike D Maler, Sophie Zwick, Carsten Kallfass, Peggy Engelhard, Hexin Shi, Laura Hellig, Pang Zhengyang, Annika Hardt, Gernot Zissel, Zsolt Ruzsics, Willi Jahnen-Dechent, Stefan F Martin, Peter Jess Nielsen, Daiana Stolz, Justyna Lopatecka, Sarah Bastyans, Bruce Beutler, Wolfgang W Schamel, György Fejer, Marina Alexandra Freudenberg","doi":"10.1159/000538282","DOIUrl":"10.1159/000538282","url":null,"abstract":"<p><strong>Introduction: </strong>While TLR ligands derived from microbial flora and pathogens are important activators of the innate immune system, a variety of factors such as intracellular bacteria, viruses, and parasites can induce a state of hyperreactivity, causing a dysregulated and potentially life-threatening cytokine over-response upon TLR ligand exposure. Type I interferon (IFN-αβ) is a central mediator in the induction of hypersensitivity and is strongly expressed in splenic conventional dendritic cells (cDC) and marginal zone macrophages (MZM) when mice are infected with adenovirus. This study investigates the ability of adenoviral infection to influence the activation state of the immune system and underlines the importance of considering this state when planning the treatment of patients.</p><p><strong>Methods: </strong>Infection with adenovirus-based vectors (Ad) or pretreatment with recombinant IFN-β was used as a model to study hypersensitivity to lipopolysaccharide (LPS) in mice, murine macrophages, and human blood samples. The TNF-α, IL-6, IFN-αβ, and IL-10 responses induced by LPS after pretreatment were measured. Mouse knockout models for MARCO, IFN-αβR, CD14, IRF3, and IRF7 were used to probe the mechanisms of the hypersensitive reaction.</p><p><strong>Results: </strong>We show that, similar to TNF-α and IL-6 but not IL-10, the induction of IFN-αβ by LPS increases strongly after Ad infection. This is true both in mice and in human blood samples ex vivo, suggesting that the regulatory mechanisms seen in the mouse are also present in humans. In mice, the scavenger receptor MARCO on IFN-αβ-producing cDC and splenic marginal zone macrophages is important for Ad uptake and subsequent cytokine overproduction by LPS. Interestingly, not all IFN-αβ-pretreated macrophage types exposed to LPS exhibit an enhanced TNF-α and IL-6 response. Pretreated alveolar macrophages and alveolar macrophage-like murine cell lines (MPI cells) show enhanced responses, while bone marrow-derived and peritoneal macrophages show a weaker response. This correlates with the respective absence or presence of the anti-inflammatory IL-10 response in these different macrophage types. In contrast, Ad or IFN-β pretreatment enhances the subsequent induction of IFN-αβ in all macrophage types. IRF3 is dispensable for the LPS-induced IFN-αβ overproduction in infected MPI cells and partly dispensable in infected mice, while IRF7 is required. The expression of the LPS co-receptor CD14 is important but not absolutely required for the elicitation of a TNF-α over-response to LPS in Ad-infected mice.</p><p><strong>Conclusion: </strong>Viral infections or application of virus-based vaccines induces type I interferon and can tip the balance of the innate immune system in the direction of hyperreactivity to a subsequent exposure to TLR ligands. The adenoviral model presented here is one example of how multiple factors, both environmental and genetic, affect the physiological r","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023693/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140288330","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
MDM2 Is Essential to Maintain the Homeostasis of Epithelial Cells by Targeting p53. MDM2 通过靶向 p53 来维持上皮细胞的平衡。
IF 4.7 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-08-12 DOI: 10.1159/000539824
Su Wang, Shufen Zhong, Ying Huang, Songling Zhu, Shuangfeng Chen, Ran Wang, Sonam Wangmo, Bo Peng, Houkun Lv, Jichao Yang, Liyan Ma, Zhiyang Ling, Yaguang Zhang, Pengfei Sui, Bing Sun
{"title":"MDM2 Is Essential to Maintain the Homeostasis of Epithelial Cells by Targeting p53.","authors":"Su Wang, Shufen Zhong, Ying Huang, Songling Zhu, Shuangfeng Chen, Ran Wang, Sonam Wangmo, Bo Peng, Houkun Lv, Jichao Yang, Liyan Ma, Zhiyang Ling, Yaguang Zhang, Pengfei Sui, Bing Sun","doi":"10.1159/000539824","DOIUrl":"10.1159/000539824","url":null,"abstract":"<p><strong>Introduction: </strong>MDM2 is known as the primary negative regulator of p53, and MDM2 promotes lung cancer fibrosis and lung injury through p53-dependent and p53-independent pathways. However, the mechanism by which MDM2 influences the pathogenesis of asthma is unknown. In this study, we investigated the function of MDM2 in lung epithelial cells in type 2 lung inflammation.</p><p><strong>Methods: </strong>We used type II alveolar epithelial cell-specific heterozygous knockout of Mdm2 mice to validate its function. Then papain-induced asthma model was established, and changes in inflammation were observed by measuring immunohistochemistry and flow cytometry analysis.</p><p><strong>Results: </strong>In this study, we knockdown the mouse Mdm2 gene in type 2 alveolar epithelial cells. We demonstrated that heterozygous Mdm2 gene-deleted mice were highly susceptible to protease allergen papain-induced pulmonary inflammation characterized by increased ILC2 numbers, IL-5 and IL-13 cytokine levels, and lung pathology. A mechanistic study showed that following the decreased expression of Mdm2 in lung epithelial cells and A549 cell line, p53 was overactivated, and the expression of its downstream genes p21, Puma, and Noxa was elevated, which resulted in apoptosis. After Mdm2 knockdown, the mRNA expression of inflammation-related gene IL-25, HMGB1, and TNF-α were increased, which further amplified the downstream ILC2 response and lung inflammation.</p><p><strong>Conclusion: </strong>These results indicate that Mdm2 maintains the homeostasis of lung epithelial cells by targeting P53 and regulates the function of lung epithelial cells under type 2 lung inflammation.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141971294","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
Dysregulation of Toll-Like Receptor Signaling-Associated Gene Expression in X-Linked Agammaglobulinemia: Implications for Correlations Genotype-Phenotype and Disease Expression. X 连锁阿加球蛋白血症中 TLR 信号相关基因表达的失调:基因型-表型与疾病表达相关性的意义。
IF 4.7 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2024-08-08 DOI: 10.1159/000540082
Marcelo Teocchi, Thaís de Andrade Eugênio, Lia Furlaneto Marega, Isabella Quinti, Maria Marluce Dos Santos Vilela
{"title":"Dysregulation of Toll-Like Receptor Signaling-Associated Gene Expression in X-Linked Agammaglobulinemia: Implications for Correlations Genotype-Phenotype and Disease Expression.","authors":"Marcelo Teocchi, Thaís de Andrade Eugênio, Lia Furlaneto Marega, Isabella Quinti, Maria Marluce Dos Santos Vilela","doi":"10.1159/000540082","DOIUrl":"10.1159/000540082","url":null,"abstract":"<p><strong>Introduction: </strong>In X-linked agammaglobulinemia (XLA), the diversity of BTK variants complicates the study of genotype-phenotype correlations. Since BTK negatively regulates toll-like receptors (TLRs), we investigated if distinct BTK mutation types selectively modulate TLR pathways, affecting disease expression.</p><p><strong>Methods: </strong>Using reverse transcription-quantitative polymerase chain reaction, we quantified ten TLR signaling-related genes in XLA patients with missense (n = 3) and nonsense (n = 5) BTK mutations and healthy controls (n = 17).</p><p><strong>Results: </strong>BTK, IRAK2, PIK3R4, REL, TFRC, and UBE2N were predominantly downregulated, while RIPK2, TLR3, TLR10, and TLR6 showed variable regulation. The missense XLA group exhibited significant downregulation of IRAK2, PIK3R4, REL, and TFRC and upregulation of TLR3 and/or TLR6.</p><p><strong>Conclusion: </strong>Hypo-expression of TLR3, TLR6, and TLR10 may increase susceptibility to infections, while hyper-expression might contribute to chronic inflammatory conditions like arthritis or inflammatory bowel disease. Our findings shed light on the important inflammatory component characteristic of some XLA patients, even under optimal therapeutic conditions.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141906731","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
Ehrlichia chaffeensis Co-Opts Phagocytic Hemocytes for Systemic Dissemination in the Lone Star Tick, Amblyomma americanum. 沙弗氏埃利希菌在孤星蜱(Amblyomma americanum)体内共同利用吞噬血细胞进行系统性传播。
IF 5.3 3区 医学
Journal of Innate Immunity Pub Date : 2024-01-01 Epub Date: 2023-12-22 DOI: 10.1159/000535986
Abdulsalam Adegoke, Julia Hanson, Ryan C Smith, Shahid Karim
{"title":"Ehrlichia chaffeensis Co-Opts Phagocytic Hemocytes for Systemic Dissemination in the Lone Star Tick, Amblyomma americanum.","authors":"Abdulsalam Adegoke, Julia Hanson, Ryan C Smith, Shahid Karim","doi":"10.1159/000535986","DOIUrl":"10.1159/000535986","url":null,"abstract":"<p><strong>Introduction: </strong>Hematophagous arthropods can acquire and transmit several pathogens of medical importance. In ticks, the innate immune system is crucial in the outcome between vector-pathogen interaction and overall vector competence. However, the specific immune response(s) elicited by the immune cells known as hemocytes remains largely undefined in Ehrlichia chaffeensis and its competent tick vector, Amblyomma americanum.</p><p><strong>Methods: </strong>We utilized injection of clodronate liposome to deplete tick granulocytes combined with infection with E. chaffeensis to demonstrate their essential role in microbial infection.</p><p><strong>Results: </strong>Here, we show that granulocytes, professional phagocytic cells, are integral in eliciting immune responses against commensal and pathogen infection. The chemical depletion of granulocytes led to decreased phagocytic efficiency of tissue-associated hemocytes. We demonstrate that E. chaffeensis can infect circulating hemocytes, and both cell-free plasma and hemocytes from E. chaffeensis-infected ticks can establish Ehrlichia infection in recipient ticks. Lastly, we provide evidence to show that granulocytes play a dual role in E. chaffeensis infection. Depleting granulocytic hemocytes increased Ehrlichia load in the salivary gland and midgut tissues. In contrast, granulocyte depletion led to a reduced systemic load of Ehrlichia.</p><p><strong>Conclusion: </strong>This study has identified multiple roles for granulocytic hemocytes in the control and systemic dissemination of E. chaffeensis infection.</p>","PeriodicalId":16113,"journal":{"name":"Journal of Innate Immunity","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10794049/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139032400","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}
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