Red river hogs (RRHs) (Potamochoerus porcus), a wild species of Suidae living in Africa with a major distribution in the Guinean and Congolian forests, are natural reservoirs of African swine fever virus (ASFV) and typically are asymptomatic. Since blood and tissue macrophages of suid animals are target cell lineages of ASFV, RRH-derived macrophages are expected to play an important role in suppressing disease development in infected individuals. In the present study, we successfully isolated RRH-derived blood macrophages using co-culture techniques of RRH blood cells with porcine kidney-derived feeder cells and immortalized them by transferring SV40 large T antigen and porcine telomerase reverse transcriptase genes. The newly established macrophage cell line of the RRH-derived blood cell origin (RZJ/IBM) exhibited an Iba1-, CD172a-, and CD203a-positive typical macrophage-like phenotype and up-regulated the phosphorylation of nuclear factor-κB p65 subunit and p38 mitogen-activated protein kinase in response to the bacterial cell wall components, lipopolysaccharide (LPS) and muramyl dipeptide. In addition, RZJ/IBM cells produced the precursor form of interleukin (IL)-1β and IL-18 upon a stimulation with LPS, leading to the conversion of IL-18, but not IL-1β, into the mature form. Time-lapse live cell imaging with pHrodo dye-conjugated Escherichia coli BioParticles demonstrated the phagocytotic activity of RZJ/IBM cells. It is important to note that RZJ/IBM cells are clearly susceptible to ASFV infection and support viral replication in vitro. Therefore, the RZJ/IBM cell line provides a unique model for investigating the pathogenesis of ASFV.
{"title":"Establishment and characterization of an immortalized red river hog blood-derived macrophage cell line","authors":"Takato Takenouchi, Kentaro Masujin, Rina Ikeda, Seiki Haraguchi, Shunichi Suzuki, Hirohide Uenishi, Eiji Onda, Takehiro Kokuho","doi":"10.3389/fimmu.2024.1465952","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1465952","url":null,"abstract":"Red river hogs (RRHs) (<jats:italic>Potamochoerus porcus</jats:italic>), a wild species of <jats:italic>Suidae</jats:italic> living in Africa with a major distribution in the Guinean and Congolian forests, are natural reservoirs of African swine fever virus (ASFV) and typically are asymptomatic. Since blood and tissue macrophages of suid animals are target cell lineages of ASFV, RRH-derived macrophages are expected to play an important role in suppressing disease development in infected individuals. In the present study, we successfully isolated RRH-derived blood macrophages using co-culture techniques of RRH blood cells with porcine kidney-derived feeder cells and immortalized them by transferring SV40 large T antigen and porcine telomerase reverse transcriptase genes. The newly established macrophage cell line of the RRH-derived blood cell origin (RZJ/IBM) exhibited an Iba1-, CD172a-, and CD203a-positive typical macrophage-like phenotype and up-regulated the phosphorylation of nuclear factor-κB p65 subunit and p38 mitogen-activated protein kinase in response to the bacterial cell wall components, lipopolysaccharide (LPS) and muramyl dipeptide. In addition, RZJ/IBM cells produced the precursor form of interleukin (IL)-1β and IL-18 upon a stimulation with LPS, leading to the conversion of IL-18, but not IL-1β, into the mature form. Time-lapse live cell imaging with pHrodo dye-conjugated <jats:italic>Escherichia coli</jats:italic> BioParticles demonstrated the phagocytotic activity of RZJ/IBM cells. It is important to note that RZJ/IBM cells are clearly susceptible to ASFV infection and support viral replication <jats:italic>in vitro</jats:italic>. Therefore, the RZJ/IBM cell line provides a unique model for investigating the pathogenesis of ASFV.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.3389/fimmu.2024.1436676
Sebastian J. Theobald, Tony A. Müller, Dinah Lange, Katharina Keck, Jan Rybniker
Mycobacterium tuberculosis (Mtb) infection represents a global health problem and is characterized by formation of granuloma with a necrotic center and a systemic inflammatory response. Inflammasomes have a crucial role in the host immune response towards Mtb. These intracellular multi-protein complexes are assembled in response to pathogen-associated molecular patterns (PAMPs) or danger-associated molecular patterns (DAMPs). Inflammasome platforms activate caspases, leading to the maturation of the proinflammatory cytokines interleukin (IL)-1 and 18 and the cleavage of gasdermin D (GSDMD), a pore-forming protein responsible for cytokine release and pyroptotic cell death. Recent in vitro and in vivo findings have highlighted the importance of inflammasome signaling and subsequent necrotic cell death in Mtb-infected innate immune cells. However, we are just beginning to understand how inflammasomes contribute to disease or to a protective immune response in tuberculosis (TB). A detailed molecular understanding of inflammasome-associated pathomechanisms may foster the development of novel host-directed therapeutics or vaccines with improved activity. In this mini-review, we discuss the regulatory and molecular aspects of inflammasome activation and the associated immunological consequences for Mtb pathogenesis.
{"title":"The role of inflammasomes as central inflammatory hubs in Mycobacterium tuberculosis infection","authors":"Sebastian J. Theobald, Tony A. Müller, Dinah Lange, Katharina Keck, Jan Rybniker","doi":"10.3389/fimmu.2024.1436676","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1436676","url":null,"abstract":"<jats:italic>Mycobacterium tuberculosis</jats:italic> (<jats:italic>Mtb</jats:italic>) infection represents a global health problem and is characterized by formation of granuloma with a necrotic center and a systemic inflammatory response. Inflammasomes have a crucial role in the host immune response towards <jats:italic>Mtb</jats:italic>. These intracellular multi-protein complexes are assembled in response to pathogen-associated molecular patterns (PAMPs) or danger-associated molecular patterns (DAMPs). Inflammasome platforms activate caspases, leading to the maturation of the proinflammatory cytokines interleukin (IL)-1 and 18 and the cleavage of gasdermin D (GSDMD), a pore-forming protein responsible for cytokine release and pyroptotic cell death. Recent <jats:italic>in vitro</jats:italic> and <jats:italic>in vivo</jats:italic> findings have highlighted the importance of inflammasome signaling and subsequent necrotic cell death in <jats:italic>Mtb</jats:italic>-infected innate immune cells. However, we are just beginning to understand how inflammasomes contribute to disease or to a protective immune response in tuberculosis (TB). A detailed molecular understanding of inflammasome-associated pathomechanisms may foster the development of novel host-directed therapeutics or vaccines with improved activity. In this mini-review, we discuss the regulatory and molecular aspects of inflammasome activation and the associated immunological consequences for <jats:italic>Mtb</jats:italic> pathogenesis.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.3389/fimmu.2024.1445610
Muriel Schmutz, Suzanne Chartier, Thierry Leblanc, Charlotte Mussini, Antoine Gardin, Emmanuel Gonzales, Anne-Marie Roque-Afonso, Solene Le Cam, Geraldine Hery, Benedicte Neven, Ramy Charbel, Jean-Pierre Vartanian, Emmanuel Jacquemin, Guillaume Morelle, Marion Almes
BackgroundSeronegative autoimmune hepatitis in children is a rare but potentially severe disease, sometimes requiring liver transplantation. This type of hepatitis may be associated with various immunological and hematological disorders, ranging from isolated lymphopenia to aplastic anemia. Precise pathophysiological mechanisms are still unknown, but the role of viruses cannot be excluded, either as directly pathogenic or as triggers, responsible for an inappropriate immune stimulation. Having the impression of an increasing number of seronegative autoimmune hepatitis since the beginning of SARS-CoV-2 pandemia period, we hypothesized that SARS-CoV-2 virus could be an infectious trigger.MethodsWe conducted a retrospective, observational, descriptive study about children with seronegative autoimmune hepatitis, in a tertiary care center, between 2010 and 2022.ResultsThirty-two patients were included. The overall incidence of seronegative autoimmune hepatitis increased 3.3-fold in 2020-2022, during the SARS-CoV-2 pandemia period (16 patients in 2.8 years) compared with 2010-2019 the pre pandemia period (16 patients in 9 years). Patients’ clinical and biochemical liver characteristics did not differ between the two periods. Hematological damages were less severe during the pandemia period. Immunological studies revealed a dysregulated immune response. The initiation of immunosuppressive therapy (corticosteroids ± cyclosporine) was earlier during the pandemia period than before.ConclusionIn cases of undetermined acute hepatitis, an immune-mediated origin should be considered, prompting a liver biopsy. If the histological aspect points to an immune origin, immunosuppressive treatment should be instituted even though autoimmune hepatitis antibodies are negative. Close hematological monitoring must be performed in all cases. The 3.3-fold increase of cases during the SARS-CoV-2 pandemia will need to be further analyzed to better understand the underlying immunological mechanisms, and to prove its potential involvement.
{"title":"Increased incidence of seronegative autoimmune hepatitis in children during SARS-CoV-2 pandemia period","authors":"Muriel Schmutz, Suzanne Chartier, Thierry Leblanc, Charlotte Mussini, Antoine Gardin, Emmanuel Gonzales, Anne-Marie Roque-Afonso, Solene Le Cam, Geraldine Hery, Benedicte Neven, Ramy Charbel, Jean-Pierre Vartanian, Emmanuel Jacquemin, Guillaume Morelle, Marion Almes","doi":"10.3389/fimmu.2024.1445610","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1445610","url":null,"abstract":"BackgroundSeronegative autoimmune hepatitis in children is a rare but potentially severe disease, sometimes requiring liver transplantation. This type of hepatitis may be associated with various immunological and hematological disorders, ranging from isolated lymphopenia to aplastic anemia. Precise pathophysiological mechanisms are still unknown, but the role of viruses cannot be excluded, either as directly pathogenic or as triggers, responsible for an inappropriate immune stimulation. Having the impression of an increasing number of seronegative autoimmune hepatitis since the beginning of SARS-CoV-2 pandemia period, we hypothesized that SARS-CoV-2 virus could be an infectious trigger.MethodsWe conducted a retrospective, observational, descriptive study about children with seronegative autoimmune hepatitis, in a tertiary care center, between 2010 and 2022.ResultsThirty-two patients were included. The overall incidence of seronegative autoimmune hepatitis increased 3.3-fold in 2020-2022, during the SARS-CoV-2 pandemia period (16 patients in 2.8 years) compared with 2010-2019 the pre pandemia period (16 patients in 9 years). Patients’ clinical and biochemical liver characteristics did not differ between the two periods. Hematological damages were less severe during the pandemia period. Immunological studies revealed a dysregulated immune response. The initiation of immunosuppressive therapy (corticosteroids ± cyclosporine) was earlier during the pandemia period than before.ConclusionIn cases of undetermined acute hepatitis, an immune-mediated origin should be considered, prompting a liver biopsy. If the histological aspect points to an immune origin, immunosuppressive treatment should be instituted even though autoimmune hepatitis antibodies are negative. Close hematological monitoring must be performed in all cases. The 3.3-fold increase of cases during the SARS-CoV-2 pandemia will need to be further analyzed to better understand the underlying immunological mechanisms, and to prove its potential involvement.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.3389/fimmu.2024.1446072
Laura E. Carreto-Binaghi, Marcelo B. Sztein, Jayaum S. Booth
The mucosal immune system is a critical first line of defense to infectious diseases, as many pathogens enter the body through mucosal surfaces, disrupting the balanced interactions between mucosal cells, secretory molecules, and microbiota in this challenging microenvironment. The mucosal immune system comprises of a complex and integrated network that includes the gut-associated lymphoid tissues (GALT). One of its primary responses to microbes is the secretion of IgA, whose role in the mucosa is vital for preventing pathogen colonization, invasion and spread. The mechanisms involved in these key responses include neutralization of pathogens, immune exclusion, immune modulation, and cross-protection. The generation and maintenance of high affinity IgA responses require a delicate balance of multiple components, including B and T cell interactions, innate cells, the cytokine milieu (e.g., IL-21, IL-10, TGF-β), and other factors essential for intestinal homeostasis, including the gut microbiota. In this review, we will discuss the main cellular components (e.g., T cells, innate lymphoid cells, dendritic cells) in the gut microenvironment as mediators of important effector responses and as critical players in supporting B cells in eliciting and maintaining IgA production, particularly in the context of enteric infections and vaccination in humans. Understanding the mechanisms of humoral and cellular components in protection could guide and accelerate the development of more effective mucosal vaccines and therapeutic interventions to efficiently combat mucosal infections.
粘膜免疫系统是抵御传染病的第一道关键防线，因为许多病原体通过粘膜表面进入人体，破坏了粘膜细胞、分泌分子和微生物群在这一充满挑战的微环境中的平衡互动。粘膜免疫系统由一个复杂的综合网络组成，其中包括肠道相关淋巴组织（GALT）。它对微生物的主要反应之一是分泌 IgA，IgA 在粘膜中的作用对于防止病原体定植、入侵和扩散至关重要。这些关键反应所涉及的机制包括中和病原体、免疫排斥、免疫调节和交叉保护。高亲和力 IgA 反应的产生和维持需要多种成分的微妙平衡，包括 B 细胞和 T 细胞的相互作用、先天性细胞、细胞因子环境（如 IL-21、IL-10、TGF-β）以及肠道平衡所必需的其他因素，包括肠道微生物群。在这篇综述中，我们将讨论肠道微环境中的主要细胞成分（如 T 细胞、先天性淋巴细胞、树突状细胞），它们是重要效应反应的介质，也是支持 B 细胞诱导和维持 IgA 生成的关键因素，尤其是在人类肠道感染和接种疫苗的情况下。了解体液和细胞保护成分的机制可指导并加速开发更有效的粘膜疫苗和治疗干预措施，从而有效对抗粘膜感染。
{"title":"Role of cellular effectors in the induction and maintenance of IgA responses leading to protective immunity against enteric bacterial pathogens","authors":"Laura E. Carreto-Binaghi, Marcelo B. Sztein, Jayaum S. Booth","doi":"10.3389/fimmu.2024.1446072","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1446072","url":null,"abstract":"The mucosal immune system is a critical first line of defense to infectious diseases, as many pathogens enter the body through mucosal surfaces, disrupting the balanced interactions between mucosal cells, secretory molecules, and microbiota in this challenging microenvironment. The mucosal immune system comprises of a complex and integrated network that includes the gut-associated lymphoid tissues (GALT). One of its primary responses to microbes is the secretion of IgA, whose role in the mucosa is vital for preventing pathogen colonization, invasion and spread. The mechanisms involved in these key responses include neutralization of pathogens, immune exclusion, immune modulation, and cross-protection. The generation and maintenance of high affinity IgA responses require a delicate balance of multiple components, including B and T cell interactions, innate cells, the cytokine milieu (e.g., IL-21, IL-10, TGF-β), and other factors essential for intestinal homeostasis, including the gut microbiota. In this review, we will discuss the main cellular components (e.g., T cells, innate lymphoid cells, dendritic cells) in the gut microenvironment as mediators of important effector responses and as critical players in supporting B cells in eliciting and maintaining IgA production, particularly in the context of enteric infections and vaccination in humans. Understanding the mechanisms of humoral and cellular components in protection could guide and accelerate the development of more effective mucosal vaccines and therapeutic interventions to efficiently combat mucosal infections.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.3389/fimmu.2024.1408501
Xin Zhang, Rui Su, Hui Wang, Ruihe Wu, Yuxin Fan, Zexuan Bin, Chong Gao, Caihong Wang
Rheumatoid arthritis (RA) affects millions of people worldwide, but there are limited drugs available to treat it, so acquiring a more comprehensive comprehension of the underlying reasons and mechanisms behind inflammation is crucial, as well as developing novel therapeutic approaches to manage it and mitigate or forestall associated harm. It is evident that current in vitro models cannot faithfully replicate all aspects of joint diseases, which makes them ineffective as tools for disease research and drug testing. Organ-on-a-chip (OoC) technology is an innovative platform that can mimic the microenvironment and physiological state of living tissues more realistically than traditional methods by simulating the spatial arrangement of cells and interorgan communication. This technology allows for the precise control of fluid flow, nutrient exchange, and the transmission of physicochemical signals, such as bioelectrical, mechanical stimulation and shear force. In addition, the integration of cutting-edge technologies like sensors, 3D printing, and artificial intelligence enhances the capabilities of these models. Here, we delve into OoC models with a particular focus on Synovial Joints-on-a-Chip, where we outline their structure and function, highlighting the potential of the model to advance our understanding of RA. We integrate the actual evidence regarding various OoC models and their possible integration for multisystem disease study in RA research for the first time and introduce the prospects and opportunities of the chip in RA etiology and pathological mechanism research, drug research, disease prevention and human precision medicine. Although many challenges remain, OoC holds great promise as an in vitro model that approaches physiology and dynamics.
类风湿性关节炎（RA）影响着全球数百万人，但可用于治疗的药物却很有限，因此，更全面地了解炎症背后的根本原因和机制以及开发新型治疗方法来控制炎症、减轻或避免相关伤害至关重要。显然，目前的体外模型无法忠实地复制关节疾病的所有方面，因此无法有效地作为疾病研究和药物测试的工具。芯片上器官（OoC）技术是一种创新平台，通过模拟细胞的空间排列和器官间的交流，它能比传统方法更真实地模拟活体组织的微环境和生理状态。这项技术可以精确控制液体流动、营养交换以及理化信号（如生物电、机械刺激和剪切力）的传输。此外，传感器、3D 打印和人工智能等尖端技术的整合也增强了这些模型的功能。在此，我们将深入探讨 OoC 模型，尤其关注 "芯片滑膜关节"，概述其结构和功能，强调该模型在促进我们对 RA 的了解方面的潜力。我们首次整合了有关各种 OoC 模型的实际证据及其在 RA 研究中用于多系统疾病研究的可能性，并介绍了芯片在 RA 病因和病理机制研究、药物研究、疾病预防和人类精准医疗方面的前景和机遇。尽管仍存在许多挑战，但作为一种接近生理学和动力学的体外模型，OoC前景广阔。
{"title":"The promise of Synovial Joint-on-a-Chip in rheumatoid arthritis","authors":"Xin Zhang, Rui Su, Hui Wang, Ruihe Wu, Yuxin Fan, Zexuan Bin, Chong Gao, Caihong Wang","doi":"10.3389/fimmu.2024.1408501","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1408501","url":null,"abstract":"Rheumatoid arthritis (RA) affects millions of people worldwide, but there are limited drugs available to treat it, so acquiring a more comprehensive comprehension of the underlying reasons and mechanisms behind inflammation is crucial, as well as developing novel therapeutic approaches to manage it and mitigate or forestall associated harm. It is evident that current <jats:italic>in vitro</jats:italic> models cannot faithfully replicate all aspects of joint diseases, which makes them ineffective as tools for disease research and drug testing. Organ-on-a-chip (OoC) technology is an innovative platform that can mimic the microenvironment and physiological state of living tissues more realistically than traditional methods by simulating the spatial arrangement of cells and interorgan communication. This technology allows for the precise control of fluid flow, nutrient exchange, and the transmission of physicochemical signals, such as bioelectrical, mechanical stimulation and shear force. In addition, the integration of cutting-edge technologies like sensors, 3D printing, and artificial intelligence enhances the capabilities of these models. Here, we delve into OoC models with a particular focus on Synovial Joints-on-a-Chip, where we outline their structure and function, highlighting the potential of the model to advance our understanding of RA. We integrate the actual evidence regarding various OoC models and their possible integration for multisystem disease study in RA research for the first time and introduce the prospects and opportunities of the chip in RA etiology and pathological mechanism research, drug research, disease prevention and human precision medicine. Although many challenges remain, OoC holds great promise as an <jats:italic>in vitro</jats:italic> model that approaches physiology and dynamics.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.3389/fimmu.2024.1447879
Xiaodong Niu, Tao Chang, Yuekang Zhang, Yanhui Liu, Yuan Yang, Qing Mao
BackgroundThis study aimed to identify prognostic factors for survival and develop a prognostic nomogram to predict the survival probability of elderly patients with lower-grade gliomas (LGGs).MethodsElderly patients with histologically confirmed LGG were recruited from the Surveillance, Epidemiology, and End Results (SEER) database. These individuals were randomly allocated to the training and validation cohorts at a 2:1 ratio. First, Kaplan−Meier survival analysis and subgroup analysis were performed. Second, variable screening of all 13 variables and a comparison of predictive models based on full Cox regression and LASSO-Cox regression analyses were performed, and the key variables in the optimal model were selected to construct prognostic nomograms for OS and CSS. Finally, a risk stratification system and a web-based dynamic nomogram were constructed.ResultsA total of 2307 elderly patients included 1220 males and 1087 females, with a median age of 72 years and a mean age of 73.30 ± 6.22 years. Among them, 520 patients (22.5%) had Grade 2 gliomas, and 1787 (77.5%) had Grade 3 gliomas. Multivariate Cox regression analysis revealed four independent prognostic factors (age, WHO grade, surgery, and chemotherapy) that were used to construct the full Cox model. In addition, LASSO-Cox regression analysis revealed five prognostic factors (age, WHO grade, surgery, radiotherapy, and chemotherapy), and a LASSO model was constructed. A comparison of the two models revealed that the LASSO model with five variables had better predictive performance than the full Cox model with four variables. Ultimately, five key variables based on LASSO-Cox regression were utilized to develop prognostic nomograms for predicting the 1-, 2-, and 5-year OS and CSS rates. The nomograms exhibited relatively good predictive ability and clinical utility. Moreover, the risk stratification system based on the nomograms effectively divided patients into low-risk and high-risk subgroups.ConclusionVariable screening based on LASSO-Cox regression was used to determine the optimal prediction model in this study. Prognostic nomograms could serve as practical tools for predicting survival probabilities, categorizing these patients into different mortality risk subgroups, and developing personalized decision-making strategies for elderly patients with LGGs. Moreover, the web-based dynamic nomogram could facilitate its use in the clinic.
{"title":"Variable screening and model construction for prognosis of elderly patients with lower-grade gliomas based on LASSO-Cox regression: a population-based cohort study","authors":"Xiaodong Niu, Tao Chang, Yuekang Zhang, Yanhui Liu, Yuan Yang, Qing Mao","doi":"10.3389/fimmu.2024.1447879","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1447879","url":null,"abstract":"BackgroundThis study aimed to identify prognostic factors for survival and develop a prognostic nomogram to predict the survival probability of elderly patients with lower-grade gliomas (LGGs).MethodsElderly patients with histologically confirmed LGG were recruited from the Surveillance, Epidemiology, and End Results (SEER) database. These individuals were randomly allocated to the training and validation cohorts at a 2:1 ratio. First, Kaplan−Meier survival analysis and subgroup analysis were performed. Second, variable screening of all 13 variables and a comparison of predictive models based on full Cox regression and LASSO-Cox regression analyses were performed, and the key variables in the optimal model were selected to construct prognostic nomograms for OS and CSS. Finally, a risk stratification system and a web-based dynamic nomogram were constructed.ResultsA total of 2307 elderly patients included 1220 males and 1087 females, with a median age of 72 years and a mean age of 73.30 ± 6.22 years. Among them, 520 patients (22.5%) had Grade 2 gliomas, and 1787 (77.5%) had Grade 3 gliomas. Multivariate Cox regression analysis revealed four independent prognostic factors (age, WHO grade, surgery, and chemotherapy) that were used to construct the full Cox model. In addition, LASSO-Cox regression analysis revealed five prognostic factors (age, WHO grade, surgery, radiotherapy, and chemotherapy), and a LASSO model was constructed. A comparison of the two models revealed that the LASSO model with five variables had better predictive performance than the full Cox model with four variables. Ultimately, five key variables based on LASSO-Cox regression were utilized to develop prognostic nomograms for predicting the 1-, 2-, and 5-year OS and CSS rates. The nomograms exhibited relatively good predictive ability and clinical utility. Moreover, the risk stratification system based on the nomograms effectively divided patients into low-risk and high-risk subgroups.ConclusionVariable screening based on LASSO-Cox regression was used to determine the optimal prediction model in this study. Prognostic nomograms could serve as practical tools for predicting survival probabilities, categorizing these patients into different mortality risk subgroups, and developing personalized decision-making strategies for elderly patients with LGGs. Moreover, the web-based dynamic nomogram could facilitate its use in the clinic.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.3389/fimmu.2024.1427276
Yuhang Zhu, Wanguo Liu, Mei Wang, Xu Wang, Sibo Wang
ObjectivesThere is evidence from observational studies that human microbiota is linked to skin appendage Disorders (SADs). Nevertheless, the causal association between microbiota and SADs is yet to be fully clarified.MethodsA comprehensive two-sample Mendelian randomization (MR) was first performed to determine the causal effect of skin and gut microbiota on SADs. A total of 294 skin taxa and 211 gut taxa based on phylum, class, order, family, genus, and ASV level information were identified. Summary data of SADs and eight subtypes (acne vulgaris, hidradenitis suppurativa, alopecia areata, rogenic alopecia, rosacea, rhinophyma, seborrhoeic dermatitis, and pilonidal cyst) were obtained from the FinnGen consortium. We performed bidirectional MR to determine whether the skin and gut microbiota are causally associated with multiple SADs. Furthermore, sensitivity analysis was conducted to examine horizontal pleiotropy and heterogeneity.ResultsA total of 65 and 161 causal relationships between genetic liability in the skin and gut microbiota with SADs were identified, respectively. Among these, we separately found 5 and 11 strong causal associations that passed Bonferroni correction in the skin and gut microbiota with SADs. Several skin bacteria, such as Staphylococcus, Streptococcus, and Propionibacterium, were considered associated with multiple SADs. As gut probiotics, Bifidobacteria and Lactobacilli were associated with a protective effect on SAD risk. There was no significant heterogeneity in instrumental variables or horizontal pleiotropy.ConclusionsOur MR analysis unveiled bidirectional causal relationships between SADs and the gut and skin microbiota, and had the potential to offer novel perspectives on the mechanistic of microbiota-facilitated dermatosis.
目的观察性研究表明，人类微生物群与皮肤附件疾病（SAD）有关。方法为了确定皮肤和肠道微生物群对 SADs 的因果关系，首先进行了全面的双样本孟德尔随机分析（MR）。根据门、纲、目、科、属和 ASV 级信息，共确定了 294 个皮肤类群和 211 个肠道类群。我们从芬兰基因联盟获得了 SADs 和八个亚型（寻常痤疮、化脓性扁桃体炎、斑秃、玫瑰痤疮、鼻炎、脂溢性皮炎和皮脂腺囊肿）的汇总数据。我们进行了双向磁共振分析，以确定皮肤和肠道微生物群是否与多种 SAD 存在因果关系。此外，我们还进行了敏感性分析，以考察横向多效性和异质性。结果 在皮肤和肠道微生物群的遗传责任与 SADs 之间分别发现了 65 和 161 个因果关系。其中，我们在皮肤和肠道微生物群中分别发现了 5 种和 11 种通过 Bonferroni 校正的强因果关系。一些皮肤细菌，如葡萄球菌、链球菌和丙酸杆菌，被认为与多种 SAD 相关。作为肠道益生菌，双歧杆菌和乳酸杆菌对 SAD 风险具有保护作用。结论我们的MR分析揭示了SAD与肠道和皮肤微生物群之间的双向因果关系，并有可能为微生物群促进皮肤病的机理提供新的视角。
{"title":"Causal roles of skin and gut microbiota in skin appendage disorders suggested by genetic study","authors":"Yuhang Zhu, Wanguo Liu, Mei Wang, Xu Wang, Sibo Wang","doi":"10.3389/fimmu.2024.1427276","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1427276","url":null,"abstract":"ObjectivesThere is evidence from observational studies that human microbiota is linked to skin appendage Disorders (SADs). Nevertheless, the causal association between microbiota and SADs is yet to be fully clarified.MethodsA comprehensive two-sample Mendelian randomization (MR) was first performed to determine the causal effect of skin and gut microbiota on SADs. A total of 294 skin taxa and 211 gut taxa based on phylum, class, order, family, genus, and ASV level information were identified. Summary data of SADs and eight subtypes (acne vulgaris, hidradenitis suppurativa, alopecia areata, rogenic alopecia, rosacea, rhinophyma, seborrhoeic dermatitis, and pilonidal cyst) were obtained from the FinnGen consortium. We performed bidirectional MR to determine whether the skin and gut microbiota are causally associated with multiple SADs. Furthermore, sensitivity analysis was conducted to examine horizontal pleiotropy and heterogeneity.ResultsA total of 65 and 161 causal relationships between genetic liability in the skin and gut microbiota with SADs were identified, respectively. Among these, we separately found 5 and 11 strong causal associations that passed Bonferroni correction in the skin and gut microbiota with SADs. Several skin bacteria, such as <jats:italic>Staphylococcus</jats:italic>, <jats:italic>Streptococcus</jats:italic>, and <jats:italic>Propionibacterium</jats:italic>, were considered associated with multiple SADs. As gut probiotics, <jats:italic>Bifidobacteria</jats:italic> and <jats:italic>Lactobacilli</jats:italic> were associated with a protective effect on SAD risk. There was no significant heterogeneity in instrumental variables or horizontal pleiotropy.ConclusionsOur MR analysis unveiled bidirectional causal relationships between SADs and the gut and skin microbiota, and had the potential to offer novel perspectives on the mechanistic of microbiota-facilitated dermatosis.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.3389/fimmu.2024.1456145
May Y. Choi, Karen H. Costenbader, Marvin J. Fritzler
IntroductionDespite progress in our understanding of disease pathogenesis for systemic autoimmune rheumatic diseases (SARD), these diseases are still associated with high morbidity, disability, and mortality. Much of the strongest evidence to date implicating environmental factors in the development of autoimmunity has been based on well-established, large, longitudinal prospective cohort studies.MethodsHerein, we review the current state of knowledge on known environmental factors associated with the development of SARD and potential areas for future research.ResultsThe risk attributable to any particular environmental factor ranges from 10-200%, but exposures are likely synergistic in altering the immune system in a complex interplay of epigenetics, hormonal factors, and the microbiome leading to systemic inflammation and eventual organ damage. To reduce or forestall the progression of autoimmunity, a better understanding of disease pathogenesis is still needed.ConclusionOwing to the complexity and multifactorial nature of autoimmune disease, machine learning, a type of artificial intelligence, is increasingly utilized as an approach to analyzing large datasets. Future studies that identify patients who are at high risk of developing autoimmune diseases for prevention trials are needed.
{"title":"Environment and systemic autoimmune rheumatic diseases: an overview and future directions","authors":"May Y. Choi, Karen H. Costenbader, Marvin J. Fritzler","doi":"10.3389/fimmu.2024.1456145","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1456145","url":null,"abstract":"IntroductionDespite progress in our understanding of disease pathogenesis for systemic autoimmune rheumatic diseases (SARD), these diseases are still associated with high morbidity, disability, and mortality. Much of the strongest evidence to date implicating environmental factors in the development of autoimmunity has been based on well-established, large, longitudinal prospective cohort studies.MethodsHerein, we review the current state of knowledge on known environmental factors associated with the development of SARD and potential areas for future research.ResultsThe risk attributable to any particular environmental factor ranges from 10-200%, but exposures are likely synergistic in altering the immune system in a complex interplay of epigenetics, hormonal factors, and the microbiome leading to systemic inflammation and eventual organ damage. To reduce or forestall the progression of autoimmunity, a better understanding of disease pathogenesis is still needed.ConclusionOwing to the complexity and multifactorial nature of autoimmune disease, machine learning, a type of artificial intelligence, is increasingly utilized as an approach to analyzing large datasets. Future studies that identify patients who are at high risk of developing autoimmune diseases for prevention trials are needed.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.3389/fimmu.2024.1458022
Muhammad Iqbal, Muizz Zaman, Niranjan Ojha, Yung-Tian A. Gau, Eufrosina I. Young
Post-pump chorea (PPC) is characterized by the development of choreiform movements following cardiopulmonary bypass (CPB) surgery. PPC occurs almost exclusively in children, and its pathophysiology remains unclear. Here we present an adult case of PPC after bovine aortic valve replacement (AVR) which exhibited dramatic and reproducible response to steroid, suggesting the presence of occult neuroinflammation. This observation suggests a novel underlying mechanism in certain subgroups of PPC, which is likely a heterogeneous condition to start with. Further research into the pathomechanisms of PPC could offer insights into managing this otherwise symptomatic control-only condition.
{"title":"The known and unknown of post-pump chorea: a case report on robust steroid responsiveness implicating occult neuroinflammation","authors":"Muhammad Iqbal, Muizz Zaman, Niranjan Ojha, Yung-Tian A. Gau, Eufrosina I. Young","doi":"10.3389/fimmu.2024.1458022","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1458022","url":null,"abstract":"Post-pump chorea (PPC) is characterized by the development of choreiform movements following cardiopulmonary bypass (CPB) surgery. PPC occurs almost exclusively in children, and its pathophysiology remains unclear. Here we present an adult case of PPC after bovine aortic valve replacement (AVR) which exhibited dramatic and reproducible response to steroid, suggesting the presence of occult neuroinflammation. This observation suggests a novel underlying mechanism in certain subgroups of PPC, which is likely a heterogeneous condition to start with. Further research into the pathomechanisms of PPC could offer insights into managing this otherwise symptomatic control-only condition.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Immunotherapy has proved to be a breakthrough in cancer treatment. So far, a bulk of the approved/late-stage cancer immunotherapy are antibody-based. Although these antibody-based drugs have demonstrated great promise, a majority of them are limited due to their access to extracellular targets, lack of oral bioavailability, tumor microenvironment penetration, induction of antibody dependent cytotoxicity etc. In recent times, there has been an increased research focus on the development of small molecule immunomodulators since they have the potential to overcome the aforementioned limitations posed by antibodies. Furthermore, while most biologics based therapeutics that are in clinical use are limited to modulating the adaptive immune system, very few clinically approved therapeutic modalities exist that modulate the innate immune system. The innate immune system, which is the body’s first line of defense, has the ability to turn cold tumors hot and synergize strongly with existing adaptive immune modulators. In preclinical studies, small molecule innate immune modulators have demonstrated synergistic efficacy as combination modalities with current standard-of-care immune checkpoint antibodies. In this review, we highlight the recent advances made by small molecule innate immunomodulators in cancer immunotherapy.
{"title":"Small molecule innate immune modulators in cancer therapy","authors":"Avijit Goswami, Sandeep Goyal, Princy Khurana, Kawaljit Singh, Barnali Deb, Aditya Kulkarni","doi":"10.3389/fimmu.2024.1395655","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1395655","url":null,"abstract":"Immunotherapy has proved to be a breakthrough in cancer treatment. So far, a bulk of the approved/late-stage cancer immunotherapy are antibody-based. Although these antibody-based drugs have demonstrated great promise, a majority of them are limited due to their access to extracellular targets, lack of oral bioavailability, tumor microenvironment penetration, induction of antibody dependent cytotoxicity etc. In recent times, there has been an increased research focus on the development of small molecule immunomodulators since they have the potential to overcome the aforementioned limitations posed by antibodies. Furthermore, while most biologics based therapeutics that are in clinical use are limited to modulating the adaptive immune system, very few clinically approved therapeutic modalities exist that modulate the innate immune system. The innate immune system, which is the body’s first line of defense, has the ability to turn cold tumors hot and synergize strongly with existing adaptive immune modulators. In preclinical studies, small molecule innate immune modulators have demonstrated synergistic efficacy as combination modalities with current standard-of-care immune checkpoint antibodies. In this review, we highlight the recent advances made by small molecule innate immunomodulators in cancer immunotherapy.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142222375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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