Heterogeneous Origins and Functions of Mouse Skeletal Muscle Resident Macrophages
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ABSTRACT:
PROVIDER: PRJNA597126 | ENA |
REPOSITORIES: ENA
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Project description:Tissue resident macrophages can arise from either embryonic or adult hematopoiesis and play important roles in a wide range of biological processes, such as tissue remodeling during organogenesis, tissue homeostasis in the steady state, tissue repair following injury, and immune response to pathogens. Although the origins and tissue-specific functions of resident macrophages have been extensively studied in many other tissues, they are not well characterized in skeletal muscle. In the present study, we have characterized for the first time the ontogeny of skeletal muscle resident macrophages, showing evidence that they arise from both embryonic hematopoietic progenitors, including yolk sac primitive macrophages and fetal liver monocytes, and adult bone marrow hematopoietic stem cells. Single cell-based transcriptome analysis revealed that skeletal muscle resident macrophages were highly distinctive from resident macrophages in other tissues, expressing a specific set of transcription factors and containing functionally diverse subsets correlating to their origins. They appear more active in maintaining tissue homeostasis and promoting muscle growth and regeneration.
2020-07-29 | GSE142480 | GEO
Project description:Tissue-resident macrophages can originate from embryonic or adult hematopoiesis. They play important roles in a wide range of biological processes including tissue remodeling during organogenesis, organ homeostasis, repair following injury, and immune response to pathogens. Although the origins and tissue-specific functions of resident macrophages have been extensively studied in many other tissues, they are not well characterized in skeletal muscle. In the present study, we have characterized the ontogeny of skeletal muscle-resident macrophages by lineage tracing and bone marrow transplant experiments. We demonstrate that skeletal muscle-resident macrophages originate from both embryonic hematopoietic progenitors located within the yolk sac and fetal liver as well as definitive hematopoietic stem cells located within the bone marrow of adult mice. Single-cell-based transcriptome analyses revealed that skeletal muscle-resident macrophages are distinctive from resident macrophages in other tissues as they express a distinct complement of transcription factors and are composed of functionally diverse subsets correlating to their origins. Functionally, skeletal muscle-resident macrophages appear to maintain tissue homeostasis and promote muscle growth and regeneration.
| S-EPMC7456122 | biostudies-literature
Project description:Liver macrophages play a major role in the control of infections in the liver and in the pathology associated with chronic liver diseases. It was recently shown that liver macrophages can have two different origins, however, the extent to which these populations are functionally distinct remains to be fully addressed. In this study, we compare the gene expression profile of liver resident and bone marrow derived liver macrophages in mouse, 6 weeks after total body irradiation and bone marrow transplantation.
2016-07-28 | E-MTAB-4954 | biostudies-arrayexpress
Project description:microRNA transcriptome data from wild type and Gata6-deficient tissue resident peritoneal macrophages. Tissue resident macrophages are notoriously heterogeneous, exhibiting discrete phenotypes as a consequence of tissue- and micro-anatomical niche-specific functions, but the molecular basis for this is not understood. Gata6 itself has been shown to be a target of multiple miR. However, microRNA transcriptome and its dependence on tissue-specific macrophage programming, such as effected by GATA6, has not been explored. We used microRNA sequencing to determine the patterns of microRNA expression in peritoneal resident macrophages at homeostasis in the absence of GATA-6 against wild type.
2023-06-30 | E-MTAB-13039 | biostudies-arrayexpress
Project description:Tissue resident macrophages are notoriously heterogeneous, exhibiting discrete phenotypes as a consequence of tissue- and micro-anatomical niche-specific functions, but the molecular basis for this is not understood. We resolved a restricted transcriptional profile for the self-renewing population of peritoneal resident macrophages, which is expressed during homeostasis and inflammation and distinct from other MM-CM-^X. Prominent within this profile was the expression of Gata6. This study represents a characterisation of the role of Gata6 in peritoneal resident macrophage phenotype. We used microarrays to determine the patterns of gene expression in peritoneal resident MM-CM-^X in the absence of GATA-6 against wild type. Conditional 'floxed' Gata6 deficient sex-matched mice between 7 weeks old were compared against wild type
2014-05-09 | E-GEOD-47049 | biostudies-arrayexpress
Project description:Heterogeneous maintenance of human tissue resident memory T cells based on efflux capacities
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Project description:Resident macrophages orchestrate homeostatic, inflammatory, and reparative activities. It is appreciated that different tissues instruct specialized macrophage functions. However, individual tissues contain heterogeneous subpopulations, and how these subpopulations are related is unclear. We asked whether common transcriptional and functional elements could reveal an underlying framework across tissues. Using single-cell RNA sequencing and random forest modeling, we observed that four genes could predict three macrophage subsets that were present in murine heart, liver, lung, kidney, and brain. Parabiotic and genetic fate mapping studies revealed that these core markers predicted three unique life cycles across 17 tissues. TLF+ (expressing TIMD4 and/or LYVE1 and/or FOLR2) macrophages were maintained through self-renewal with limited monocyte input; CCR2+ (TIMD4−LYVE1−FOLR2−) macrophages were almost entirely replaced by monocytes, and MHC-IIhi macrophages (TIMD4−LYVE1−FOLR2−CCR2−), while receiving modest monocyte contribution, were not continually replaced. Rather, monocyte-derived macrophages contributed to the resident macrophage population until they reached a defined upper limit after which they did not outcompete pre-existing resident populations. TLF+ macrophages were first to emerge in the yolk sac and early fetal organs. Fate mapping studies in the mouse and human single-cell RNA sequencing indicated that TLF+ macrophages originated from both yolk sac and fetal monocyte precursors. Furthermore, TLF+ macrophages were the most transcriptionally conserved subset across mouse tissues and between mice and humans, despite organ- and species-specific transcriptional differences. Here, we define the existence of three murine macrophage subpopulations based on common life cycle properties and core gene signatures, and suggest a common starting point to understand tissue macrophage heterogeneity.
2022-01-07 | GSE188647 | GEO
Project description:Skeletal muscle dysfunction in survivors of pneumonia is a major cause of lasting morbidity that disproportionately affects older individuals. We found that skeletal muscle recovery was impaired in aged compared with young mice after influenza A virus-induced pneumonia. In young mice, recovery of muscle loss was associated with expansion of tissue-resident skeletal muscle macrophages and downregulation of MHC II expression, followed by a proliferation of muscle satellite cells. These findings were absent in aged mice and in mice deficient in Cx3cr1. Transcriptomic profiling of tissue-resident skeletal muscle macrophages from aged compared with young mice showed downregulation of pathways associated with phagocytosis and proteostasis, and persistent upregulation of inflammatory pathways. Consistently, skeletal muscle macrophages from aged mice failed to downregulate MHCII expression during recovery from influenza A virus induced pneumonia and showed impaired phagocytic function in vitro. Like aged animals, mice deficient in the phagocytic receptor Mertk showed no macrophage expansion, MHCII downregulation or satellite cell proliferation and failed to recover skeletal muscle function after influenza A pneumonia. Our data suggest that a loss of phagocytic function in a CX3CR1+ tissue-resident skeletal muscle macrophage population in aged mice precludes satellite cell proliferation and recovery of skeletal muscle function after influenza A pneumonia.
2020-08-05 | GSE142580 | GEO
Project description:Adult Connective Tissue-Resident Mast Cells Originate from Late Erythro-Myeloid Progenitors [origins]
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Project description:Oleic Acid Induces Tissue-Resident FOXP3 Regulatory T Cell Suppressive Functions
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