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Elchaninov A, Vishnyakova P, Lokhonina A, Kiseleva V, Menyailo E, Antonova M, Mamedov A, Arutyunyan I, Bolshakova G, Goldshtein D, Bao X, Fatkhudinov T, Sukhikh G. Spleen regeneration after subcutaneous heterotopic autotransplantation in a mouse model. Biol Res 2023; 56:15. [PMID: 36991509 DOI: 10.1186/s40659-023-00427-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 03/20/2023] [Indexed: 03/31/2023] Open
Abstract
BACKGROUND Splenectomy may lead to severe postoperative complications, including sepsis and cancers. A possible solution to this problem is heterotopic autotransplantation of the spleen. Splenic autografts rapidly restore the regular splenic microanatomy in model animals. However, the functional competence of such regenerated autografts in terms of lympho- and hematopoietic capacity remains uncertain. Therefore, this study aimed to monitor the dynamics of B and T lymphocyte populations, the monocyte-macrophage system, and megakaryocytopoiesis in murine splenic autografts. METHODS The model of subcutaneous splenic engraftment was implemented in C57Bl male mice. Cell sources of functional recovery were studied using heterotopic transplantations from B10-GFP donors to C57Bl recipients. The cellular composition dynamics were studied by immunohistochemistry and flow cytometry. Expression of regulatory genes at mRNA and protein levels was assessed by real-time PCR and Western blot, respectively. RESULTS Characteristic splenic architecture is restored within 30 days post-transplantation, consistent with other studies. The monocyte-macrophage system, megakaryocytes, and B lymphocytes show the highest rates, whereas the functional recovery of T cells takes longer. Cross-strain splenic engraftments using B10-GFP donors indicate the recipient-derived cell sources of the recovery. Transplantations of scaffolds populated with splenic stromal cells or without them afforded no restoration of the characteristic splenic architecture. CONCLUSIONS Allogeneic subcutaneous transplantation of splenic fragments in a mouse model leads to their structural recovery within 30 days, with full reconstitution of the monocyte-macrophage, megakaryocyte and B lymphocyte populations. The circulating hematopoietic cells provide the likely source for the cell composition recovery.
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Affiliation(s)
- Andrey Elchaninov
- Laboratory of Growth and Development, Avtsyn Research Institute of Human Morphology of FSBI Petrovsky National Research Centre of Surgery, Moscow, Russia.
- Histology Department, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia.
| | - Polina Vishnyakova
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia
- Histology Department, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
| | - Anastasiya Lokhonina
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia
- Histology Department, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
| | - Viktoria Kiseleva
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia
| | - Egor Menyailo
- Laboratory of Growth and Development, Avtsyn Research Institute of Human Morphology of FSBI Petrovsky National Research Centre of Surgery, Moscow, Russia
| | - Maria Antonova
- Histology Department, Pirogov Russian National Research Medical University, Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Aiaz Mamedov
- Histology Department, Pirogov Russian National Research Medical University, Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Irina Arutyunyan
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia
| | - Galina Bolshakova
- Laboratory of Growth and Development, Avtsyn Research Institute of Human Morphology of FSBI Petrovsky National Research Centre of Surgery, Moscow, Russia
| | - Dmitry Goldshtein
- Laboratory of Stem Cells Genetics, Research Center of Medical Genetics, Moscow, Russia
| | - Xuhui Bao
- Institute of Therapeutic Cancer Vaccines, Fudan University Pudong Medical Center, Shanghai, China
| | - Timur Fatkhudinov
- Laboratory of Growth and Development, Avtsyn Research Institute of Human Morphology of FSBI Petrovsky National Research Centre of Surgery, Moscow, Russia
- Histology Department, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
| | - Gennady Sukhikh
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, Moscow, Russia
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O’Neill HC, Lim HK. Skeletal stem/progenitor cells provide the niche for extramedullary hematopoiesis in spleen. Front Physiol 2023; 14:1148414. [PMID: 37007998 PMCID: PMC10063897 DOI: 10.3389/fphys.2023.1148414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 03/10/2023] [Indexed: 03/19/2023] Open
Abstract
In bone marrow, the niche which supports hematopoiesis and nurtures hematopoietic stem cells (HSCs) contains perivascular reticular cells representing a subset of skeletal stem/progenitor cells (SSPCs). These stromal cells which provide the niche are lost or become inadequate during stress, disease or ageing, such that HSCs leave bone marrow and enter spleen and other peripheral sites to initiate extramedullary hematopoiesis and particularly myelopoiesis. Spleen also maintains niches for HSCs under steady-state conditions, evident since neonatal and adult spleen contain HSCs in low number and provide low-level hematopoiesis. In spleen, HSCs are found in the sinusoidal-rich red pulp region also in the vicinity of perivascular reticular cells. These cells resemble to some extent the known stromal elements reflecting HSC niches in bone marrow, and are investigated here for their characteristics as a subset of SSPCs. The isolation of spleen stromal subsets and the generation of cell lines which support HSCs and myelopoiesis in vitro has led to the identification of perivascular reticular cells which are unique to spleen. Analysis of gene and marker expression, as well as differentiative potential, identifies an osteoprogenitor cell type, reflective of one of several subsets of SSPCs described previously in bone, bone marrow and adipose tissue. The combined information supports a model for HSC niches in spleen involving perivascular reticular cells as SSPCs having osteogenic, stroma-forming capacity. These associate with sinusoids in red pulp to form niches for HSCs and to support the differentiation of hematopoietic progenitors during extramedullary hematopoiesis.
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Zhai Y, Zhao Y, Zhang Y, He J, Tang M, Liu Y, Yang G, Xue P, Yao Y, He M, Xu Y, Qu W, Zhang Y. Lead suppresses interferon γ to induce splenomegaly via modification on splenic endothelial cells and lymphoid tissue organizer cells in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 244:114046. [PMID: 36057201 DOI: 10.1016/j.ecoenv.2022.114046] [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: 05/08/2022] [Revised: 08/21/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
Splenomegaly is a symptom characterized by the presence of an enlarged spleen. The impact of environmental factors on splenomegaly is largely unknown. In this study, C57BL/6 mice were treated with 125 ppm or 1250 ppm lead (Pb) via drinking water for 8 wk, and the process of splenomegaly was evaluated. Treatment with 1250 ppm Pb, but not 125 ppm Pb, caused splenomegaly, which was associated with increased capacity for erythrocyte clearance. Intriguingly, Pb-caused splenomegaly was independent of lymphoid tissue inducer (LTi) cells, which produce lymphotoxins α and β (LTα/β) to activate endothelial cells and LT organizer (LTo) cells and drive the development of spleen physiologically. A direct action of Pb on endothelial cells and LTo cells did not impact their proliferation. On the other hand, during steady state, a tonic level of interferon (IFN)γ acted on endothelial cells and LTo cells to suppress splenomegaly, as IFNγ receptor (IFNγR)-deficient mice had enlarged spleens relative to wild-type mice; during Pb exposure, splenic IFNγ production was suppressed, thus leading to a loss of the inhibitory effect of IFNγ on splenomegaly. Mechanically, Pb acted on splenic CD4+ T cells to suppress IFNγ production, which impaired the Janus kinase (Jak)1/ signal transducer and activator of transcription (STAT)1 signaling in endothelial cells and LTo cells; the weakened Jak1/STAT1 signaling resulted in the enhanced nuclear factor-κB (NF-κB) signaling in endothelial cells and LTo cells, which drove their proliferation and caused splenomegaly. The present study reveals a previously unrecognized mechanism for the immunotoxicity of Pb, which may extend our current understanding for Pb toxicology.
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Affiliation(s)
- Yue Zhai
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yifan Zhao
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yufan Zhang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Jinyi He
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Mengke Tang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yalin Liu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Guangrui Yang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Peng Xue
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Ye Yao
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Miao He
- State Key Laboratory of Medical Neurobiology, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Yanyi Xu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Weidong Qu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yubin Zhang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China.
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Elchaninov A, Vishnyakova P, Sukhikh G, Fatkhudinov T. Spleen: Reparative Regeneration and Influence on Liver. Life (Basel) 2022; 12:life12050626. [PMID: 35629294 PMCID: PMC9148119 DOI: 10.3390/life12050626] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/14/2022] [Accepted: 04/21/2022] [Indexed: 02/06/2023] Open
Abstract
This review considers experimental findings on splenic repair, obtained in two types of small animal (mouse, rat, and rabbit) models: splenic resections and autologous transplantations of splenic tissue. Resection experiments indicate that the spleen is able to regenerate, though not necessarily to the initial volume. The recovery lasts one month and preserves the architecture, albeit with an increase in the relative volume of lymphoid follicles. The renovated tissues, however, exhibit skewed functional profiles; notably, the decreased production of antibodies and the low cytotoxic activity of T cells, consistent with the decline of T-dependent zones and prolonged reduction in T cell numbers. Species-specific differences are evident as well, with the post-repair organ mass deficiency most pronounced in rabbit models. Autotransplantations of splenic material are of particular clinical interest, as the procedure can possibly mitigate the development of post-splenectomy syndrome. Under these conditions, regeneration lasts 1-2 months, depending on the species. The transplants effectively destroy senescent erythrocytes, assist in microbial clearance, and produce antibodies, thus averting sepsis and bacterial pneumonia. Meanwhile, cellular sources of splenic recovery in such models remain obscure, as well as the time required for T and B cell number reconstitution.
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Affiliation(s)
- Andrey Elchaninov
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (P.V.); (G.S.)
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia, 117198 Moscow, Russia;
- Correspondence:
| | - Polina Vishnyakova
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (P.V.); (G.S.)
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia, 117198 Moscow, Russia;
| | - Gennady Sukhikh
- Laboratory of Regenerative Medicine, National Medical Research Center for Obstetrics, Gynecology and Perinatology Named after Academician V.I. Kulakov of Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia; (P.V.); (G.S.)
| | - Timur Fatkhudinov
- Histology Department, Medical Institute, Peoples’ Friendship University of Russia, 117198 Moscow, Russia;
- Laboratory of Growth and Development, Scientific Research Institute of Human Morphology, 117418 Moscow, Russia
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5
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Borelli A, Irla M. Lymphotoxin: from the physiology to the regeneration of the thymic function. Cell Death Differ 2021; 28:2305-2314. [PMID: 34290396 PMCID: PMC8329281 DOI: 10.1038/s41418-021-00834-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 01/31/2023] Open
Abstract
The members of the Tumor Necrosis Factor (TNF) superfamily, the ligand lymphotoxin α1β2 (LTα1β2) and its unique receptor lymphotoxin β receptor (LTβR), play a pivotal role in the establishment and regulation of the immune system by allowing a tight communication between lymphocytes and stromal cells. Recent advances using transgenic mice harboring a specific deletion of the Ltbr gene in distinct stromal cells have revealed important roles for LTβR signaling in the thymic function that ensures the generation of a diverse and self-tolerant T-cell repertoire. In this review, we summarize our current knowledge on this signaling axis in the thymic homing of lymphoid progenitors and peripheral antigen-presenting cells, the trafficking and egress of thymocytes, the differentiation of medullary thymic epithelial cells, and the establishment of central tolerance. We also highlight the importance of LTα1β2/LTβR axis in controlling the recovery of the thymic function after myeloablative conditioning regimen, opening novel perspectives in regenerative medicine.
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Affiliation(s)
- Alexia Borelli
- grid.417850.f0000 0004 0639 5277Aix-Marseille University, CNRS, INSERM, CIML, Centre d’Immunologie de Marseille-Luminy, Marseille, France
| | - Magali Irla
- grid.417850.f0000 0004 0639 5277Aix-Marseille University, CNRS, INSERM, CIML, Centre d’Immunologie de Marseille-Luminy, Marseille, France
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6
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Bellomo A, Gentek R, Golub R, Bajénoff M. Macrophage-fibroblast circuits in the spleen. Immunol Rev 2021; 302:104-125. [PMID: 34028841 DOI: 10.1111/imr.12979] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/30/2021] [Accepted: 04/30/2021] [Indexed: 12/22/2022]
Abstract
Macrophages are an integral part of all organs in the body, where they contribute to immune surveillance, protection, and tissue-specific homeostatic functions. This is facilitated by so-called niches composed of macrophages and their surrounding stroma. These niches structurally anchor macrophages and provide them with survival factors and tissue-specific signals that imprint their functional identity. In turn, macrophages ensure appropriate functioning of the niches they reside in. Macrophages thus form reciprocal, mutually beneficial circuits with their cellular niches. In this review, we explore how this concept applies to the spleen, a large secondary lymphoid organ whose primary functions are to filter the blood and regulate immunity. We first outline the splenic micro-anatomy, the different populations of splenic fibroblasts and macrophages and their respective contribution to protection of and key physiological processes occurring in the spleen. We then discuss firmly established and potential cellular circuits formed by splenic macrophages and fibroblasts, with an emphasis on the molecular cues underlying their crosstalk and their relevance to splenic functionality. Lastly, we conclude by considering how these macrophage-fibroblast circuits might be impaired by aging, and how understanding these changes might help identify novel therapeutic avenues with the potential of restoring splenic functions in the elderly.
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Affiliation(s)
- Alicia Bellomo
- CIRI, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Univ Lyon, Lyon, France
| | - Rebecca Gentek
- Centre for Inflammation Research & Centre for Reproductive Health, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Rachel Golub
- Inserm U1223, Institut Pasteur, Paris, France.,Lymphopoiesis Unit, Institut Pasteur, Paris, France
| | - Marc Bajénoff
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
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7
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Mendes J, Areia AL, Rodrigues-Santos P, Santos-Rosa M, Mota-Pinto A. Innate Lymphoid Cells in Human Pregnancy. Front Immunol 2020; 11:551707. [PMID: 33329512 PMCID: PMC7734178 DOI: 10.3389/fimmu.2020.551707] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 10/28/2020] [Indexed: 12/26/2022] Open
Abstract
Innate lymphoid cells (ILCs) are a new set of cells considered to be a part of the innate immune system. ILCs are classified into five subsets (according to their transcription factors and cytokine profile) as natural killer cells (NK cells), group 1 ILCs, group 2 ILCs, group 3 ILCs, and lymphoid tissue inducers (LTi). Functionally, these cells resemble the T helper population but lack the expression of recombinant genes, which is essential for the formation of T cell receptors. In this work, the authors address the distinction between peripheral and decidual NK cells, highlighting their diversity in ILC biology and its relevance to human pregnancy. ILCs are effector cells that are important in promoting immunity, inflammation, and tissue repair. Recent studies have directed their attention to ILC actions in pregnancy. Dysregulation or expansion of pro-inflammatory ILC populations as well as abnormal tolerogenic responses may directly interfere with pregnancy, ultimately resulting in pregnancy loss or adverse outcomes. In this review, we characterize these cells, considering recent findings and addressing knowledge gaps in perinatal medicine in the context of ILC biology. Moreover, we discuss the relevance of these cells not only to the process of immune tolerance, but also in disease.
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Affiliation(s)
- João Mendes
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, General Pathology Institute, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - Ana Luísa Areia
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, General Pathology Institute, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Obstetrics Department, Coimbra University Hospital Center, Coimbra, Portugal
| | - Paulo Rodrigues-Santos
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine (FMUC), Institute of Immunology, University of Coimbra, Coimbra, Portugal
- Center for Neuroscience and Cell Biology (CNC), Laboratory of Immunology and Oncology, University of Coimbra, Coimbra, Portugal
| | - Manuel Santos-Rosa
- Faculty of Medicine (FMUC), Institute of Immunology, University of Coimbra, Coimbra, Portugal
| | - Anabela Mota-Pinto
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, General Pathology Institute, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
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8
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Zanardo TÉC, Amorim FG, Taufner GH, Pereira RHA, Baiense IM, Destefani AC, Iwai LK, Maranhão RC, Nogueira BV. Decellularized Splenic Matrix as a Scaffold for Spleen Bioengineering. Front Bioeng Biotechnol 2020; 8:573461. [PMID: 33123515 PMCID: PMC7567156 DOI: 10.3389/fbioe.2020.573461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/08/2020] [Indexed: 01/15/2023] Open
Abstract
The spleen is considered a non-essential organ. However, its importance is increasingly clear, given the serious disorders caused by its absence or dysfunction, e.g., greater susceptibility to infections, thromboembolism and cancer. Surgical techniques to preserve the spleen and maintain splenic function have become increasingly common. However, the morbidity and mortality associated with its absence and dysfunction are still high. We used the decellularization technique to obtain a viable splenic scaffold for recellularization in vitro and propose the idea of bioengineered spleen transplantation to the host. We observed the maintenance of important structural components such as white pulp, marginal zone and red pulp, in addition to the network of vascular ducts. The decellularized scaffold presents minimal residual DNA and SDS, which are essential to prevent immunogenic responses and transplantation failure. Also, the main components of the splenic matrix were preserved after decellularization, with retention of approximately 72% in the matrisomal protein content. The scaffold we developed was partially recellularized with stromal cells from the spleen of neonatal rats, demonstrating adhesion, proliferation and viability of cells. Therefore, the splenic scaffold is very promising for use in studies on spleen reconstruction and transplantation, with the aim of complete recovery of splenic function.
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Affiliation(s)
- Tadeu Ériton Caliman Zanardo
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
| | - Fernanda Gobbi Amorim
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Pharmaceutical Sciences Graduate Program, University of Vila Velha, Vila Velha, Brazil
| | - Gabriel Henrique Taufner
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
| | - Rayssa Helena Arruda Pereira
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
| | - Ian Manhoni Baiense
- Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
| | - Afrânio Côgo Destefani
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
| | - Leo Kei Iwai
- Laboratory of Proteomics and Mass Spectrometry-Special Laboratory of Applied Toxinology LETA/CETICS, Instituto Butantan, São Paulo, Brazil
| | | | - Breno Valentim Nogueira
- Biotechnology Graduate Program, Rede Nordeste de Biotecnologia (RENORBIO), Vitória, Brazil.,Tissue Engineering Core, Department of Morphology, Federal University of Espírito Santo, Vitória, Brazil
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9
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O'Neill HC, Lim HK, Periasamy P, Kumarappan L, Tan JKH, O'Neill TJ. Transplanted spleen stromal cells with osteogenic potential support ectopic myelopoiesis. PLoS One 2019; 14:e0223416. [PMID: 31584977 PMCID: PMC6777786 DOI: 10.1371/journal.pone.0223416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/20/2019] [Indexed: 12/24/2022] Open
Abstract
Spleen stromal lines which support in vitro hematopoiesis are investigated for their lineage origin and hematopoietic support function in vivo. Marker expression and gene profiling identify a lineage relationship with mesenchymal stem cells and perivascular reticular cells described recently in bone marrow. Stromal lines commonly express Cxcl12, Pdgfra and Pdgfr typical of bone marrow derived perivascular reticular cells but reflect a unique cell type in terms of other gene and marker expression. Their classification as osteoprogenitors is confirmed through ability to undergo osteogenic, but not adipogenic or chondrogenic differentiation. Some stromal lines were shown to form ectopic niches for HSCs following engraftment under the kidney capsule of NOD/SCID mice. The presence of myeloid cells and a higher representation of a specific dendritic-like cell type over other myeloid cells within grafts was consistent with previous in vitro evidence of hematopoietic support capacity. These studies reinforce the role of perivascular/perisinusoidal reticular cells in hematopoiesis and implicate such cells as niches for hematopoiesis in spleen.
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Affiliation(s)
- Helen C O'Neill
- Clem Jones Research Centre for Regenerative Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Hong K Lim
- Clem Jones Research Centre for Regenerative Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Pravin Periasamy
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory, Australia.,Department of Microbiology, Yoo Long School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lavanya Kumarappan
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Jonathan K H Tan
- Clem Jones Research Centre for Regenerative Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Terence J O'Neill
- Big Data Centre, Bond Business School, Bond University, Gold Coast, Queensland, Australia
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10
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Komori S, Saito Y, Respatika D, Nishimura T, Kotani T, Murata Y, Matozaki T. SIRPα + dendritic cells promote the development of fibroblastic reticular cells in murine peripheral lymph nodes. Eur J Immunol 2019; 49:1364-1371. [PMID: 31099900 DOI: 10.1002/eji.201948103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 04/01/2019] [Accepted: 05/15/2019] [Indexed: 11/06/2022]
Abstract
Nonhematopoietic stromal cells contribute to the organization and homeostasis of secondary lymphoid organs by producing cytokines and chemokines. The development and maintenance of these stromal cells are thought to be regulated by innate immune cells. Indeed, we recently showed that signal regulatory protein α (SIRPα)-positive dendritic cells (DCs) are essential for the proliferation and survival of podoplanin (Pdpn)-positive fibroblastic reticular cells (FRCs) in mouse spleen. We have now established an in vitro culture system for lymph node stromal cells (LNSCs) isolated from mouse peripheral LNs. Activated DCs and TNF-α each promoted the proliferation of cultured LNSCs, most of which were found to be Pdpn+ FRCs. Furthermore, ablation of SIRPα in CD11c+ cells attenuated this effect of DCs on LNSC proliferation. Transplantation of activated DCs together with cultured LNSCs into the renal subcapsular space markedly increased the number of ER-TR7+ stromal cells as well as induced the accumulation of T cells and increased the expression of Ccl19 in the transplants. Ablation of SIRPα in CD11c+ cells greatly impaired the development of LN-like structure in the transplants. Our findings thus suggest that SIRPα+ DCs are important for the proliferation and differentiation of Pdpn+ FRCs in peripheral LNs.
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Affiliation(s)
- Satomi Komori
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasuyuki Saito
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Datu Respatika
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan.,Division of Reconstruction, Oculoplasty, and Oncology, Faculty of Medicine, Department of Ophthalmology, Public Health, and Nursing, Gadjah Mada University, Yogyakarta, Indonesia
| | - Taichi Nishimura
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takenori Kotani
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoji Murata
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takashi Matozaki
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
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11
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Short C, Lim HK, Tan J, O'Neill HC. Targeting the Spleen as an Alternative Site for Hematopoiesis. Bioessays 2019; 41:e1800234. [PMID: 30970171 DOI: 10.1002/bies.201800234] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/25/2019] [Indexed: 12/21/2022]
Abstract
Bone marrow is the main site for hematopoiesis in adults. It acts as a niche for hematopoietic stem cells (HSCs) and contains non-hematopoietic cells that contribute to stem cell dormancy, quiescence, self-renewal, and differentiation. HSC also exist in resting spleen of several species, although their contribution to hematopoiesis under steady-state conditions is unknown. The spleen can however undergo extramedullary hematopoiesis (EMH) triggered by physiological stress or disease. With the loss of bone marrow niches in aging and disease, the spleen as an alternative tissue site for hematopoiesis is an important consideration for future therapy, particularly during HSC transplantation. In terms of harnessing the spleen as a site for hematopoiesis, here the remarkable regenerative capacity of the spleen is considered with a view to forming additional or ectopic spleen tissue through cell engraftment. Studies in mice indicate the potential for such grafts to support the influx of hematopoietic cells leading to the development of normal spleen architecture. An important goal will be the formation of functional ectopic spleen tissue as an aid to hematopoietic recovery following clinical treatments that impact bone marrow. For example, expansion or replacement of niches could be considered where myeloablation ahead of HSC transplantation compromises treatment outcomes.
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Affiliation(s)
- Christie Short
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QLD, 4229, Australia
| | - Hong K Lim
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QLD, 4229, Australia
| | - Jonathan Tan
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QLD, 4229, Australia
| | - Helen C O'Neill
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QLD, 4229, Australia
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12
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Lim HK, O'Neill HC. Identification of Stromal Cells in Spleen Which Support Myelopoiesis. Front Cell Dev Biol 2019; 7:1. [PMID: 30733944 PMCID: PMC6354566 DOI: 10.3389/fcell.2019.00001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 01/08/2019] [Indexed: 12/18/2022] Open
Abstract
Stromal cells in spleen organize tissue into red pulp, white pulp and marginal zone, and also interact with hematopoietic cells to regulate immune responses. This study has used phenotypic information of a previously described spleen stromal cell line called 5G3, which supports restricted hematopoiesis in vitro, to identify an equivalent stromal cell subset in vivo and to test its capacity to support hematopoiesis. Using stromal cell fractionation, phenotypic analysis, as well as cell growth and hematopoietic support assays, the Sca-1+gp38+Thy1.2+CD29+CD51+ fraction of spleen stroma has been identified as an equivalent stromal subset resembling the 5G3 cell counterpart. While heterogeneity may still exist within that subset, it has been shown to have superior hematopoietic support capacity compared with the 5G3 cell line, and all other spleen stromal cell fractions tested.
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Affiliation(s)
- Hong Kiat Lim
- Clem Jones Centre for Regenerative Medicine, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia.,Research School of Biology, Australian National University, Canberra, ACT, Australia
| | - Helen C O'Neill
- Clem Jones Centre for Regenerative Medicine, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia
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13
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Miller D, Motomura K, Garcia-Flores V, Romero R, Gomez-Lopez N. Innate Lymphoid Cells in the Maternal and Fetal Compartments. Front Immunol 2018; 9:2396. [PMID: 30416502 PMCID: PMC6212529 DOI: 10.3389/fimmu.2018.02396] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 09/27/2018] [Indexed: 12/20/2022] Open
Abstract
Pregnancy success is orchestrated by the complex balance between the maternal and fetal immune systems. Herein, we summarize the potential role of innate lymphoid cells (ILCs) in the maternal and fetal compartments. We reviewed published literature describing different ILC subsets [ILC1s, ILC2s, ILC3s, and lymphoid tissue inducer (LTi) cells] in the uterus, decidua, fetal tissues [liver, secondary lymphoid organs (SLO), intestine, and lung] and amniotic cavity. ILC1s, ILC2s, and ILC3s are present in the murine uterus prior to and during pregnancy but have only been detected in the non-pregnant endometrium in humans. Specifically, ILC2s reside in the murine uterus from mid-pregnancy to term, ILC1s increase throughout gestation, and ILC3s remain constant. Yet, LTi cells have only been detected in the non-pregnant murine uterus. In the human decidua, ILC1s, ILC3s, and LTi-like cells are more abundant during early gestation, whereas ILC2s increase at the end of pregnancy. Decidual ILC1s were also detected during mid-gestation in mice. Interestingly, functional decidual ILC2s and ILC3s increased in women who underwent spontaneous preterm labor, indicating the involvement of such cells in this pregnancy complication. Fetal ILCs exist in the liver, SLO, intestine, lung, and amniotic cavity. The fetal liver is thought to be the source of ILC progenitors since the differentiation of these cells from hematopoietic stem cells occurs at this site, and mature ILC subsets can be found in this compartment as well. The interaction between LTi cells and specialized stromal cells is important during the formation of SLO. Mature ILCs are found at the mucosal surfaces of the lung and intestine, from where they can extravasate into the amniotic cavity. Amniotic fluid ILCs express high levels of RORγt, CD161, and CD103, hallmarks of ILC3s. Such cells are more abundant in the second trimester than later in gestation. Although amniotic fluid ILC3s produce IL-17A and TNFα, indicating their functionality, their numbers in patients with intra-amniotic infection/inflammation remain unchanged compared to those without this pregnancy complication. Collectively, these findings suggest that maternal (uterine and decidual) ILCs play central roles in both the initiation and maintenance of pregnancy, and fetal ILCs participate in the development of immunity.
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Affiliation(s)
- Derek Miller
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, MD and Detroit, MI, United States.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, United States
| | - Kenichiro Motomura
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, MD and Detroit, MI, United States.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, United States
| | - Valeria Garcia-Flores
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, MD and Detroit, MI, United States.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, United States
| | - Roberto Romero
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, MD and Detroit, MI, United States.,Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, United States.,Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, United States.,Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, United States
| | - Nardhy Gomez-Lopez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, MD and Detroit, MI, United States.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, United States.,Department of Immunology, Microbiology and Biochemistry, Wayne State University School of Medicine, Detroit, MI, United States
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14
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Golub R, Tan J, Watanabe T, Brendolan A. Origin and Immunological Functions of Spleen Stromal Cells. Trends Immunol 2018; 39:503-514. [PMID: 29567327 DOI: 10.1016/j.it.2018.02.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 02/14/2018] [Accepted: 02/16/2018] [Indexed: 01/20/2023]
Abstract
The mammalian spleen is a peripheral lymphoid organ that plays a central role in host defense. Consequently, the lack of spleen is often associated with immunodeficiency and increased risk of overwhelming infections. Growing evidence suggests that non-hematopoietic stromal cells are central players in spleen development, organization, and immune functions. In addition to its immunological role, the spleen also provides a site for extramedullary hematopoiesis (EMH) in response to injuries. A deeper understanding of the biology of stromal cells is therefore essential to fully comprehend how these cells modulate the immune system during normal and pathological conditions. Here, we review the specificities of the different mouse spleen stromal cell subsets and complement the murine studies with human data when available.
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Affiliation(s)
- Rachel Golub
- Unit for Lymphopoiesis, Immunology Department, INSERM U1223, University Paris Diderot, Sorbonne Paris Cité, Cellule Pasteur, Institut Pasteur, Paris, France.
| | - Jonathan Tan
- Clem Jones Research Centre for Regenerative Medicine, Faculty of Health Sciences & Medicine, Bond University, Gold Coast, Australia
| | - Takeshi Watanabe
- Laboratory of Immunology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Andrea Brendolan
- Unit of Lymphoid Organ Development, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Scientific Institute, Milan, Italy.
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15
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Tan JKH, Watanabe T. Determinants of postnatal spleen tissue regeneration and organogenesis. NPJ Regen Med 2018; 3:1. [PMID: 29367882 PMCID: PMC5770394 DOI: 10.1038/s41536-018-0039-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/01/2018] [Accepted: 01/02/2018] [Indexed: 12/27/2022] Open
Abstract
The spleen is an organ that filters the blood and is responsible for generating blood-borne immune responses. It is also an organ with a remarkable capacity to regenerate. Techniques for splenic auto-transplantation have emerged to take advantage of this characteristic and rebuild spleen tissue in individuals undergoing splenectomy. While this procedure has been performed for decades, the underlying mechanisms controlling spleen regeneration have remained elusive. Insights into secondary lymphoid organogenesis and the roles of stromal organiser cells and lymphotoxin signalling in lymph node development have helped reveal similar requirements for spleen regeneration. These factors are now considered in the regulation of embryonic and postnatal spleen formation, and in the establishment of mature white pulp and marginal zone compartments which are essential for spleen-mediated immunity. A greater understanding of the cellular and molecular mechanisms which control spleen development will assist in the design of more precise and efficient tissue grafting methods for spleen regeneration on demand. Regeneration of organs which harbour functional white pulp tissue will also offer novel opportunities for effective immunotherapy against cancer as well as infectious diseases.
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Affiliation(s)
- Jonathan K. H. Tan
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD 4229 Australia
| | - Takeshi Watanabe
- Laboratory of Immunology, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, 606-8507 Japan
- The Tazuke Kofukai Medical Research Institute/Kitano Hospital, Osaka, 530-8480 Japan
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16
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Ozawa F, Okitsu T, Takeuchi S. Improvement in the Mechanical Properties of Cell-Laden Hydrogel Microfibers Using Interpenetrating Polymer Networks. ACS Biomater Sci Eng 2017; 3:392-398. [DOI: 10.1021/acsbiomaterials.6b00619] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Fumisato Ozawa
- Institute
of Industrial Science (IIS), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Takeuchi
Biohybrid Innovation Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology (JST), Komaba Open Laboratory (KOL), Room
M202, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Teru Okitsu
- Institute
of Industrial Science (IIS), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Takeuchi
Biohybrid Innovation Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology (JST), Komaba Open Laboratory (KOL), Room
M202, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Shoji Takeuchi
- Institute
of Industrial Science (IIS), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Takeuchi
Biohybrid Innovation Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology (JST), Komaba Open Laboratory (KOL), Room
M202, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
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17
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Tan JKH, Watanabe T. Stromal Cell Subsets Directing Neonatal Spleen Regeneration. Sci Rep 2017; 7:40401. [PMID: 28067323 PMCID: PMC5220291 DOI: 10.1038/srep40401] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 12/06/2016] [Indexed: 01/08/2023] Open
Abstract
Development of lymphoid tissue is determined by interactions between stromal lymphoid tissue organiser (LTo) and hematopoietic lymphoid tissue inducer (LTi) cells. A failure for LTo to receive appropriate activating signals during embryogenesis through lymphotoxin engagement leads to a complete cessation of lymph node (LN) and Peyer's patch development, identifying LTo as a key stromal population for lymphoid tissue organogenesis. However, little is known about the equivalent stromal cells that induce spleen development. Here, by dissociating neonatal murine spleen stromal tissue for re-aggregation and transplant into adult mouse recipients, we have identified a MAdCAM-1+CD31+CD201+ spleen stromal organizer cell-type critical for new tissue formation. This finding provides an insight into the regulation of post-natal spleen tissue organogenesis, and could be exploited in the development of spleen regenerative therapies.
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Affiliation(s)
- Jonathan K H Tan
- AK Project, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.,Division of Biomedical Science, Research School of Biology, The Australian National University, Canberra 0200, Australia
| | - Takeshi Watanabe
- AK Project, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
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18
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Mbanwi AN, Wang C, Geddes K, Philpott DJ, Watts TH. Irreversible splenic atrophy following chronic LCMV infection is associated with compromised immunity in mice. Eur J Immunol 2016; 47:94-106. [PMID: 27730627 DOI: 10.1002/eji.201646666] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/25/2016] [Accepted: 10/07/2016] [Indexed: 01/16/2023]
Abstract
Lymphocytic choriomeningitis virus clone 13 (LCMV13) infection of mice is a widely used model for investigating the mechanisms driving persistent viral infection in humans. LCMV13 disrupts splenic architecture early during infection, but this returns to normal within a few weeks. However, the long-term effects of LCMV13 infection on splenic structure have not been reported. Here, we report that persistent infection with LCMV13 results in sustained splenic atrophy that persists for at least 500 days following infection, whereas infection with the acutely infecting LCMV Armstrong is associated with a return to preinfection spleen weights. Splenic atrophy is associated with loss of T, B, and non-B non-T cells, with B cells most significantly affected. These effects were partly ameliorated by anti-NK1.1 or anti-CD8 antibody treatment. Antigen presentation was detectable at the time of contraction of the spleen, but no longer detected at late time points, suggesting that continued antigen presentation is not required to maintain splenic atrophy. Immunity to Salmonella infection and influenza vaccination were decreased after the virus was no longer detected. Thus splenic atrophy following LCMV13 infection is irreversible and may contribute to impaired immunity following clearance of LCMV13.
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Affiliation(s)
- Achire N Mbanwi
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Chao Wang
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Kaoru Geddes
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Dana J Philpott
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Tania H Watts
- Department of Immunology, University of Toronto, Toronto, ON, Canada
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19
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Roles of the mitochondrial Na(+)-Ca(2+) exchanger, NCLX, in B lymphocyte chemotaxis. Sci Rep 2016; 6:28378. [PMID: 27328625 PMCID: PMC4916421 DOI: 10.1038/srep28378] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/03/2016] [Indexed: 12/21/2022] Open
Abstract
Lymphocyte chemotaxis plays important roles in immunological reactions, although the mechanism of its regulation is still unclear. We found that the cytosolic Na(+)-dependent mitochondrial Ca(2+) efflux transporter, NCLX, regulates B lymphocyte chemotaxis. Inhibiting or silencing NCLX in A20 and DT40 B lymphocytes markedly increased random migration and suppressed the chemotactic response to CXCL12. In contrast to control cells, cytosolic Ca(2+) was higher and was not increased further by CXCL12 in NCLX-knockdown A20 B lymphocytes. Chelating intracellular Ca(2+) with BAPTA-AM disturbed CXCL12-induced chemotaxis, suggesting that modulation of cytosolic Ca(2+) via NCLX, and thereby Rac1 activation and F-actin polymerization, is essential for B lymphocyte motility and chemotaxis. Mitochondrial polarization, which is necessary for directional movement, was unaltered in NCLX-knockdown cells, although CXCL12 application failed to induce enhancement of mitochondrial polarization, in contrast to control cells. Mouse spleen B lymphocytes were similar to the cell lines, in that pharmacological inhibition of NCLX by CGP-37157 diminished CXCL12-induced chemotaxis. Unexpectedly, spleen T lymphocyte chemotaxis was unaffected by CGP-37157 treatment, indicating that NCLX-mediated regulation of chemotaxis is B lymphocyte-specific, and mitochondria-endoplasmic reticulum Ca(2+) dynamics are more important in B lymphocytes than in T lymphocytes. We conclude that NCLX is pivotal for B lymphocyte motility and chemotaxis.
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20
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Kellermayer Z, Hayasaka H, Kajtár B, Simon D, Robles EF, Martinez-Climent JA, Balogh P. Divergence of Vascular Specification in Visceral Lymphoid Organs-Genetic Determinants and Differentiation Checkpoints. Int Rev Immunol 2015; 35:489-502. [PMID: 26186200 DOI: 10.3109/08830185.2015.1059427] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Despite their functional similarities, peripheral lymphoid tissues are remarkably different according to their developmental properties and structural characteristics, including their specified vasculature. Access of leukocytes to these organs critically depends on their interactions with the local endothelium, where endothelial cells are patterned to display a restricted set of adhesion molecules and other regulatory compounds necessary for extravasation. Recent advances in high throughput analyses of highly purified endothelial subsets in various lymphoid tissues as well as the expansion of various transgenic animal models have shed new light on the transcriptional complexities of lymphoid tissue vascular endothelium. This review is aimed at providing a comprehensive analysis linking the functional competence of spleen and intestinal lymphoid tissues with the developmental programming and functional divergence of their vascular specification, with particular emphasis on the transcriptional control of endothelial cells exerted by Nkx2.3 homeodomain transcription factor.
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Affiliation(s)
- Zoltán Kellermayer
- a Department of Immunology and Biotechnology.,b Lymphoid Organogenesis Research Group Szentágothai Research Center, University of Pécs , Pécs , Hungary
| | - Haruko Hayasaka
- c Laboratory of Immunoregulation, Osaka University Graduate School of Medicine, WPI Immunology Frontier Research Center, Osaka University , Osaka , Japan
| | - Béla Kajtár
- d Department of Pathology , University of Pécs , Pécs , Hungary
| | - Diána Simon
- a Department of Immunology and Biotechnology
| | - Eloy F Robles
- e Centro de Investigación Médica Aplicada of the University of Navarra , Pamplona , Spain
| | | | - Péter Balogh
- a Department of Immunology and Biotechnology.,b Lymphoid Organogenesis Research Group Szentágothai Research Center, University of Pécs , Pécs , Hungary
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21
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Neely HR, Flajnik MF. CXCL13 responsiveness but not CXCR5 expression by late transitional B cells initiates splenic white pulp formation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 194:2616-23. [PMID: 25662995 PMCID: PMC4355030 DOI: 10.4049/jimmunol.1401905] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Secondary lymphoid organs (SLO) provide the structural framework for coconcentration of Ag and Ag-specific lymphocytes required for an efficient adaptive immune system. The spleen is the primordial SLO, and evolved concurrently with Ig/TCR:pMHC-based adaptive immunity. The earliest cellular/histological event in the ontogeny of the spleen's lymphoid architecture, the white pulp (WP), is the accumulation of B cells around splenic vasculature, an evolutionarily conserved feature since the spleen's emergence in early jawed vertebrates such as sharks. In mammals, B cells are indispensable for both formation and maintenance of SLO microarchitecture; their expression of lymphotoxin α1β2 (LTα1β2) is required for the LTα1β2:CXCL13 positive feedback loop without which SLO cannot properly form. Despite the spleen's central role in the evolution of adaptive immunity, neither the initiating event nor the B cell subset necessary for WP formation has been identified. We therefore sought to identify both in mouse. We detected CXCL13 protein in late embryonic splenic vasculature, and its expression was TNF-α and RAG-2 independent. A substantial influx of CXCR5(+) transitional B cells into the spleen occurred 18 h before birth. However, these late embryonic B cells were unresponsive to CXCL13 (although responsive to CXCL12) and phenotypically indistinguishable from blood-derived B cells. Only after birth did B cells acquire CXCL13 responsiveness, accumulate around splenic vasculature, and establish the uniquely splenic B cell compartment, enriched for CXCL13-responsive late transitional cells. Thus, CXCL13 is the initiating component of the CXCL13:LTα1β2 positive feedback loop required for WP ontogeny, and CXCL13-responsive late transitional B cells are the initiating subset.
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MESH Headings
- Animals
- Animals, Newborn
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Chemokine CXCL13/genetics
- Chemokine CXCL13/immunology
- Chemokine CXCL13/metabolism
- DNA-Binding Proteins/deficiency
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/immunology
- Feedback, Physiological
- Female
- Gene Expression Regulation, Developmental
- Immunohistochemistry
- In Situ Hybridization
- Lymphotoxin alpha1, beta2 Heterotrimer/immunology
- Lymphotoxin alpha1, beta2 Heterotrimer/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Pregnancy
- Receptors, CXCR5/genetics
- Receptors, CXCR5/immunology
- Receptors, CXCR5/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Spleen/blood supply
- Spleen/embryology
- Spleen/immunology
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/immunology
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Harold R Neely
- Department of Microbiology and Immunology, University of Maryland, Baltimore, MD 21201
| | - Martin F Flajnik
- Department of Microbiology and Immunology, University of Maryland, Baltimore, MD 21201
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