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Wang J, Zhu Q, Shen Y, Liang J, Wang Y, Huang Y, Tong G, Wang X, Zhang N, Yu K, Li Y, Zhao Y. CD8 + T cell infiltration and proliferation in the brainstem during experimental cerebral malaria. CNS Neurosci Ther 2024; 30:e14431. [PMID: 37697956 PMCID: PMC10916431 DOI: 10.1111/cns.14431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/06/2023] [Accepted: 07/16/2023] [Indexed: 09/13/2023] Open
Abstract
INTRODUCTION Cerebral malaria (CM) is a lethal neuroinflammatory disease caused by Plasmodium infection. Immune cells and brain parenchyma cells contribute to the pathogenesis of CM. However, a systematic examination of the changes that occur in the brain parenchyma region during CM at the single-cell resolution is still poorly studied. AIMS To explore cell composition and CD8+ T cell infiltration, single-cell RNA sequencing (scRNA-seq) was performed on the brainstems of healthy and experimental cerebral malaria (ECM) mice. Then CD8+ T cell infiltration was confirmed by flow cytometry and immunofluorescence assays. Subsequently, the characteristics of the brain-infiltrated CD8+ T cells were analyzed. Finally, the interactions between parenchyma cells and brain-infiltrated CD8+ T cells were studied with an astrocytes-CD8+ T cell cocultured model. RESULTS The brainstem is the most severely damaged site during ECM. ScRNA-seq revealed a large number of CD8+ T cells infiltrating into the brainstem in ECM mice. Brain-infiltrated CD8+ T cells were highly activated according to scRNA-seq, immunofluorescence, and flow cytometry assays. Further analysis found a subset of ki-67+ CD8+ T cells that have a higher transcriptional level of genes related to T cell function, activation, and proliferation, suggesting that they were exposed to specific antigens presented by brain parenchyma cells. Brain-infiltrated CD8+ T cells were the only prominent source of IFN-γ in this single-cell analysis. Astrocytes, which have a high interferon response, act as cross-presenting cells to recruit and re-activate brain-infiltrated CD8+ T cells. We also found that brain-infiltrated CD8+ T cells were highly expressed immune checkpoint molecule PD-1, while parenchyma cells showed up-regulation of PD-L1 after infection. CONCLUSIONS These findings reveal a novel interaction between brain-infiltrated CD8+ T cells and parenchyma cells in the ECM brainstem, suggesting that the PD-1/PD-L1 signal pathway is a promising adjunctive therapeutic strategy for ECM targeting over-activated CD8+ T cells.
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Affiliation(s)
- Jun Wang
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Qinghao Zhu
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Yan Shen
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Jiao Liang
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Yi Wang
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Yuxiao Huang
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Guodong Tong
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
- College of Life SciencesNorthwest UniversityXi'anChina
| | - Xu Wang
- School of Basic Medical SciencesFourth Military Medical UniversityXi'anChina
| | - Ningning Zhang
- School of Basic Medical SciencesFourth Military Medical UniversityXi'anChina
| | - Kangjie Yu
- Department of PathologyAir Force Hospital of Eastern TheaterNanjingChina
| | - Yinghui Li
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
| | - Ya Zhao
- Department of Medical Microbiology and ParasitologyFourth Military Medical UniversityXi'anChina
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Singh A, Mahapatra B, Banerjee A, Singh S, Singh S, Dubey VK, Das P, Singh RK. Leishmania antigens activated CD4 + T cells expressing CD200R receptors are the prime IL-10 producing phenotype and an important determinant of visceral leishmaniasis pathogenesis. Cytokine 2024; 173:156435. [PMID: 37950929 DOI: 10.1016/j.cyto.2023.156435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/02/2023] [Accepted: 11/05/2023] [Indexed: 11/13/2023]
Abstract
The excessive production of IL-10, an anti-inflammatory cytokine, by Leishmania antigen-activated T cells is supposed to be a key player in the onset and progression of visceral leishmaniasis (VL). The IL-10-producing sources in VL remain unidentified and uncharacterized. In this study, we reveal that antigen-activated CD4+ T cells, i.e., CD44+CD4+ T cells expressing CD200R receptors, are the prime IL-10-producing phenotypes in Leishmania donovani infection-induced pathogenesis. These phenotypes are separate from CD25+Foxp3+CD4+ T regulatory cells, which are classical IL-10-producing phenotypes. In order to ascertain the role of CD200R and CD25 receptors in IL-10 overexpression-associated VL pathogenesis, we abrogated CD200R and CD25 receptor-mediated signaling in the infected mice. The splenic load of parasites and the size of the liver and spleen were significantly reduced in CD200-blocked mice as compared to CD25-blocked mice. Further, the CD200 blocking polarized CD4+ T cells to pro-inflammatory cytokines-producing phenotypes, as we observed a higher frequency of IFN-γ, TNF-α, and IL-12 positive cells as compared to controls including the CD25 blocking. Our findings suggest that in L. donovani infection-induced pathogenesis the expression of CD200R on antigen-activated T cells helps them to acquire IL-10-producing abilities as part of its one of the survival strategies. However, more studies would be warranted to better understand CD200R receptors role in VL pathogenesis and to develop the next generation of therapeutic and prophylactic control measures.
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Affiliation(s)
- Abhishek Singh
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Baishakhi Mahapatra
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Arpita Banerjee
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
| | - Samer Singh
- Centre for Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221 005, India
| | - Sangram Singh
- Department of Biochemistry, Faculty of Science, Dr. RMLA University, Ayodhya 224001, India
| | - Vikash K Dubey
- Department of Biochemical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221 005, India
| | - Pradeep Das
- ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal 700010, India
| | - Rakesh K Singh
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221 005, India.
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Vitallé J, Zenarruzabeitia O, Merino-Pérez A, Terrén I, Orrantia A, Pacho de Lucas A, Iribarren JA, García-Fraile LJ, Balsalobre L, Amo L, de Andrés B, Borrego F. Human IgM hiCD300a + B Cells Are Circulating Marginal Zone Memory B Cells That Respond to Pneumococcal Polysaccharides and Their Frequency Is Decreased in People Living with HIV. Int J Mol Sci 2023; 24:13754. [PMID: 37762055 PMCID: PMC10530418 DOI: 10.3390/ijms241813754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/18/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
CD300a is differentially expressed among B cell subsets, although its expression in immunoglobulin (Ig)M+ B cells is not well known. We identified a B cell subset expressing CD300a and high levels of IgM (IgMhiCD300a+). The results showed that IgMhiCD300a+ B cells were CD10-CD27+CD25+IgDloCD21hiCD23-CD38loCD1chi, suggesting that they are circulating marginal zone (MZ) IgM memory B cells. Regarding the immunoglobulin repertoire, IgMhiCD300a+ B cells exhibited a higher mutation rate and usage of the IgH-VDJ genes than the IgM+CD300a- counterpart. Moreover, the shorter complementarity-determining region 3 (CDR3) amino acid (AA) length from IgMhiCD300a+ B cells together with the predicted antigen experience repertoire indicates that this B cell subset has a memory phenotype. IgM memory B cells are important in T cell-independent responses. Accordingly, we demonstrate that this particular subset secretes higher amounts of IgM after stimulation with pneumococcal polysaccharides or a toll-like receptor 9 (TLR9) agonist than IgM+CD300a- cells. Finally, the frequency of IgMhiCD300a+ B cells was lower in people living with HIV-1 (PLWH) and it was inversely correlated with the years with HIV infection. Altogether, these data help to identify a memory B cell subset that contributes to T cell-independent responses to pneumococcal infections and may explain the increase in severe pneumococcal infections and the impaired responses to pneumococcal vaccination in PLWH.
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Affiliation(s)
- Joana Vitallé
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
- Instituto de Biomedicina de Sevilla (IBiS), Virgen del Rocío University Hospital, CSIC, University of Seville, 41013 Seville, Spain
| | - Olatz Zenarruzabeitia
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
| | - Aitana Merino-Pérez
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
| | - Iñigo Terrén
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
| | - Ane Orrantia
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
| | - Arantza Pacho de Lucas
- Regulation of the Immune System Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain;
- Immunology Service, Cruces University Hospital, 48903 Barakaldo, Spain
| | - José A. Iribarren
- Department of Infectious Diseases, Donostia University Hospital, Biodonostia Health Research Institute, 20014 Donostia-San Sebastián, Spain;
| | - Lucio J. García-Fraile
- CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain;
- Department of Internal Medicine, La Princesa University Hospital, 28006 Madrid, Spain
| | - Luz Balsalobre
- Laboratory of Microbiology, UR Salud, Infanta Sofía University Hospital, 28702 Madrid, Spain;
| | - Laura Amo
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
- Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
| | - Belén de Andrés
- Immunobiology Department, Carlos III Health Institute, 28220 Madrid, Spain;
| | - Francisco Borrego
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (O.Z.); (A.M.-P.); (I.T.); (A.O.); (L.A.)
- Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
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Puasri P, Dechkhajorn W, Dekumyoy P, Yoonuan T, Ampawong S, Reamtong O, Boonyuen U, Benjathummarak S, Maneerat Y. Regulation of immune response against third-stage Gnathostoma spinigerum larvae by human genes. Front Immunol 2023; 14:1218965. [PMID: 37600806 PMCID: PMC10436992 DOI: 10.3389/fimmu.2023.1218965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/14/2023] [Indexed: 08/22/2023] Open
Abstract
Background Gnathostomiasis is an important zoonosis in tropical areas that is mainly caused by third-stage Gnathostoma spinigerum larvae (G. spinigerum L3). Objectives This study aimed to prove whether G. spinigerum L3 produces extracellular vesicles (EVs) and investigate human gene profiles related to the immune response against the larvae. Methods We created an immune cell model using normal human peripheral blood mononuclear cells (PBMCs) co-cultured with the larvae for 1 and 3 days, respectively. The PBMCs were harvested for transcriptome sequencing analysis. The EV ultrastructure was examined in the larvae and the cultured medium. Results Extracellular vesicle-like particles were observed under the larval teguments and in the pellets in the medium. RNA-seq analysis revealed that 2,847 and 3,118 genes were significantly expressed on days 1 and 3 after culture, respectively. The downregulated genes on day 1 after culture were involved in pro-inflammatory cytokines, the complement system and apoptosis, whereas those on day 3 were involved in T cell-dependent B cell activation and wound healing. Significantly upregulated genes related to cell proliferation, activation and development, as well as cytotoxicity, were observed on day 1, and genes regulating T cell maturation, granulocyte function, nuclear factor-κB and toll-like receptor pathways were predominantly observed on day 3 after culture. Conclusion G. spinigerum L3 produces EV-like particles and releases them into the excretory-secretory products. Overall, genotypic findings during our 3-day observation revealed that most significant gene expressions were related to T and B cell signalling, driving T helper 2 cells related to chronic infection, immune evasion of the larvae, and the pathogenesis of gnathostomiasis. Further in-depth studies are necessary to clarify gene functions in the pathogenesis and immune evasion mechanisms of the infective larvae.
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Affiliation(s)
- Pattarasuda Puasri
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wilanee Dechkhajorn
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Paron Dekumyoy
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Tippayarat Yoonuan
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Sumate Ampawong
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Onrapak Reamtong
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Usa Boonyuen
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Surachet Benjathummarak
- Center of Excellence for Antibody Research (CEAR), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Yaowapa Maneerat
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Khare D, Majumdar S, Krishnamurthy S, Dubey AK. An in vivo toxicity assessment of piezoelectric sodium potassium niobate [Na xK 1-xNbO 3 (x = 0.2-0.8)] nanoparticulates towards bone tissue engineering approach. BIOMATERIALS ADVANCES 2022; 140:213080. [PMID: 35985067 DOI: 10.1016/j.bioadv.2022.213080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/26/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
One of the recent challenges in the design/development of prosthetic orthopedic implants is to address the concern of local/systemic toxicity of debris particles, released due to wear or degradation. Such debris particles often lead to inflammation at the implanted site or aseptic loosening of the prosthesis which results in failure of the implant during long run. Several in vitro studies demonstrated the potentiality of piezoelectric sodium potassium niobate [NaxK1-xNbO3 (x = 0.2, 0.5, 0.8), NKN] as an emerging next-generation polarizable orthopedic implant. In this perspective, we performed an in vivo study to examine the local and systemic toxicity of NKN nanoparticulates, as a first report. In the present study, male Wistar rats were intra-articularly injected to the knee joint with 100 μl of NKN nanoparticulates (25 mg/ml in normal saline). After 7 days of exposure, the histopathological analyses demonstrate the absence of any inflammation or dissemination of nanoparticulates in vital organs such as heart, liver, kidney and spleen. The anti-inflammatory cytokines (IL-4 and IL-10) profile analyses suggest the increased anti-inflammatory response in the treated rats as compared to non-injected (control) rats, preferably for the sodium and potassium rich NKN i.e., Na0.8K0.2NbO3 and Na0.2K0.8NbO3. The biochemical analyses revealed no pathological changes in the liver and kidney of particulate treated rats. The present study is the first proof to confirm the non-toxic nature of NKN nanoparticulates which provides a step forward towards the development of prosthetic orthopedic implants using biocompatible piezoelectric NKN ceramics.
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Affiliation(s)
- Deepak Khare
- Department of Ceramic Engineering, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Shreyasi Majumdar
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Sairam Krishnamurthy
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Ashutosh Kumar Dubey
- Department of Ceramic Engineering, Indian Institute of Technology (BHU) Varanasi, 221005, India.
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Chang G, Li N, Wang Q, Ding J, Liu S, Hua L, Li S, Wang W. Dynamic transcriptome landscape of pulmonary tissues of rats infected with Paragonimus proliferus. Am J Transl Res 2022; 14:3395-3406. [PMID: 35702118 PMCID: PMC9185055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 04/30/2022] [Indexed: 06/15/2023]
Abstract
Paragonimiasis (pulmonary fluke disease) is a foodborne parasitic disease caused by trematode infections. Paragonimus proliferus is a characteristic Paragonimus species that was first identified in Yunnan Province of China. No direct evidence has yet proven that P. proliferus can infect humans. However, we previously found that P. proliferus infects and damages rat lung tissues via an unclear mechanism. Here, we infected Sprague Dawley rats with P. proliferus and sequenced their lung transcriptomes at various intervals thereafter. We detected P. proliferus on the surface of rat lung tissues at 7 days post infection. It colonized by attaching and secreting dsRNA and utilized nutrients from the lung tissues for mitosis and meiosis and the dynein arm of lung tissues to develop symmetrical organs. The rats generated different types of immune responses that differed according to the stage of infection. We then analyzed P. proliferus responses to these immune strategies and the genes expressed during each stage of infection. Our findings provide a foundation for developing medical treatments for P. proliferus infection.
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Affiliation(s)
- Guoji Chang
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Na Li
- Department of Pharmacy, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Qingqing Wang
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Jie Ding
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Siqi Liu
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Lijuan Hua
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Shenghao Li
- Clinical-Medical Center of Infectious Disease of Yunnan Province, The Third People’s Hospital of KunmingKunming 650043, Yunnan, China
| | - Wenlin Wang
- School of Basic Medicine, Kunming Medical UniversityKunming 650504, Yunnan, China
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