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Mueller TT, Pilartz M, Thakur M, LangHeinrich T, Luo J, Block R, Hoeflinger JKL, Meister S, Karaj F, Perez LG, Öllinger R, Engleitner T, Thoss J, Voelkl M, Tersteeg C, Koedel U, Kohlmaier AZ, Teupser D, Wygrecka M, Ye H, Preissner KT, Radbruch H, Elezkurtaj S, Mack M, Von Hundelshausen P, Weber C, Massberg S, Schulz C, Rad R, Huber S, Ishikawa-Ankerhold H, Engelmann B. Mutual regulation of CD4+ T cells and intravascular fibrin in infections. Haematologica 2024. [PMID: 38572559 DOI: 10.3324/haematol.2023.284619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Indexed: 04/05/2024] Open
Abstract
Innate myeloid cells especially neutrophils and their extracellular traps are known to promote intravascular coagulation and thrombosis formation in infections and various other conditions. Innate myeloid cell dependent fibrin formation can support systemic immunity while its dysregulation enhances the severity of infectious diseases. Less is known about the immune mechanisms preventing dysregulation of fibrin homeostasis in infection. During experimental systemic infections local fibrin deposits in the liver microcirculation cause rapid arrest of CD4+ T cells. Arrested T helper cells mostly represent Th17 cells that partially originate from the small intestine. Intravascular fibrin deposits activate mouse and human CD4+ T cells which can be mediated by direct fibrin - CD4+ T cell interactions. Activated CD4+ T cells suppress fibrin deposition and microvascular thrombosis by directly counteracting coagulation activation by neutrophils and classical monocytes. T cell activation, which is initially triggered by IL- 12p40- and MHC-II dependent mechanisms, enhances intravascular fibrinolysis via LFA-1. Moreover, CD4+ T cells disfavor the association of the fibrinolysis inhibitor TAFI with fibrin whereby fibrin deposition is increased by TAFI in the absence but not presence of T cells. In human infections thrombosis development is inversely related to microvascular levels of CD4+ T cells. Thus, fibrin promotes LFA-1 dependent T helper cell activation in infections which drives a negative feedback cycle that rapidly restricts intravascular fibrin and thrombosis development.
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Affiliation(s)
- Tonina T Mueller
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich, Germany; Medizinische Klinik I, Klinikum der Universität München, LMU, Munich.
| | - Mona Pilartz
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Manovriti Thakur
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Torben LangHeinrich
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Junfu Luo
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Rebecca Block
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Jonathan K L Hoeflinger
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Sarah Meister
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Flavio Karaj
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Laura Garcia Perez
- 1. Medizinische Klinik und Poliklinik, Universitätsklinikum Hamburg-Eppendorf, Hamburg
| | - Rupert Öllinger
- Institut für Molekulare Onkologie und Funktionelle Genomik, Technische Universität München, Munich
| | - Thomas Engleitner
- Institut für Molekulare Onkologie und Funktionelle Genomik, Technische Universität München, Munich
| | - Jakob Thoss
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Michael Voelkl
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Claudia Tersteeg
- Laboratory for Thrombosis Research, KU Leuven Campus Kulak Kortrijk
| | - Uwe Koedel
- Neurologische Klinik, Klinikum der Universität München,LMU, Munich
| | - Alexander Zigman Kohlmaier
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Daniel Teupser
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich
| | - Malgorzata Wygrecka
- Center for Infection and Genomics of the Lung (CIGL), Justus-Liebig-Universität, Giessen
| | - Haifeng Ye
- Institute of Regenerative Biology and Medicine, Helmholtz-Zentrum München, Munich
| | | | - Helena Radbruch
- Institut für Neuropathologie, Charité - Universitätsmedizin, Berlin
| | | | - Matthias Mack
- Medizinische Klinik II, University of Regensburg, Regensburg
| | - Philipp Von Hundelshausen
- Institut für Prophylaxe und Epidemiologie der Kreislaufkrankheiten, Ludwig-Maximilians-Universität, Munich
| | - Christian Weber
- Institut für Prophylaxe und Epidemiologie der Kreislaufkrankheiten, Ludwig-Maximilians-Universität, Munich
| | - Steffen Massberg
- Medizinische Klinik I, Klinikum der Universität München, LMU, Munich
| | - Christian Schulz
- Medizinische Klinik I, Klinikum der Universität München, LMU, Munich
| | - Roland Rad
- Institut für Molekulare Onkologie und Funktionelle Genomik, Technische Universität München, Munich
| | - Samuel Huber
- 1. Medizinische Klinik und Poliklinik, Universitätsklinikum Hamburg-Eppendorf, Hamburg
| | | | - Bernd Engelmann
- Institut für Laboratoriumsmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU), Munich.
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Liang L, Kanduri C, Pilartz M, Svensson K, Song JH, Wentzel P, Eriksson U, Ohlsson R. Dynamic readjustment of parental methylation patterns of the 5'-flank of the mouse H19 gene during in vitro organogenesis. Int J Dev Biol 2000; 44:785-90. [PMID: 11128572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Gametic marks are stably propagated in order to manifest parent of origin-specific expression patterns of imprinted genes in the developing conceptus. Although the character of the imprint has not yet been fully elucidated, there is compelling evidence that it involves a methylation mark. This is exemplified by a region upstream of the H19 gene, which is not only methylated in a parent of origin-specific manner, but also regulates the silencing of the maternal Igf2 and paternal H19 alleles, respectively. We show here that the parental-specific methylation patterns within the differentially methylated domain (DMD) are perturbed in the soma during in vitro organogenesis. Under these conditions, the paternal DMD allele becomes partially demethylated, whereas the maternal DMD allele gains methylation. Despite these effects, there were no changes in allelic Igf2 or H19 expression patterns in the embryo. Finally, we show that although TSA derepresses the paternal H19 allele in ectoplacental cone when in vitro developed, there is no discernible effect on the methylation status of the paternally inherited 5'-flank in comparison to control samples. Collectively, this data demonstrates that the parental mark is sensitive to a subset of environmental cues and that a certain degree of plasticity of the gametic mark is tolerated without affecting the manifestation of the imprinted state.
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Affiliation(s)
- L Liang
- Department of Development & Genetics, Uppsala University, Sweden
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Kanduri C, Holmgren C, Pilartz M, Franklin G, Kanduri M, Liu L, Ginjala V, Ullerås E, Mattsson R, Ohlsson R. The 5' flank of mouse H19 in an unusual chromatin conformation unidirectionally blocks enhancer-promoter communication. Curr Biol 2000; 10:449-57. [PMID: 10801414 DOI: 10.1016/s0960-9822(00)00442-5] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND During mouse prenatal development, the neighbouring insulin-like growth factor II (Igf2) and H19 loci are expressed monoallelically from the paternal and maternal alleles, respectively. Identical spatiotemporal expression patterns and enhancer deletion experiments show that the Igf2 and H19 genes share a common set of enhancers. Deletion of a differentially methylated region in the 5' flank of the H19 gene partially relieves the repression of the maternal Igf2 and paternal H19 alleles in the soma. The mechanisms underlying the function of the 5' flank of the H19 gene are, however, unknown. RESULTS Chromatin analysis showed that the 5' flank of the mouse H19 gene contains maternal-specific, multiple nuclease hypersensitive sites that map to linker regions between positioned nucleosomes. These features could be recapitulated in an episomal-based H19 minigene, which was propagated in human somatic cells. Although the 5' flank of the H19 promoter has no intrinsic silencer activity under these conditions, it unidirectionally extinguished promoter-enhancer communications in a position-dependent manner, without directly affecting the enhancer function. CONCLUSIONS The unmethylated 5' flank of the H19 gene adopts an unusual and maternal-specific chromatin conformation in somatic cells and regulates enhancer-promoter communications, thereby providing an explanation for its role in manifesting the repressed state of the maternally inherited Igf2 allele.
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Affiliation(s)
- C Kanduri
- Department of Animal Development and Genetics, Uppsala University, Uppsala, S-752 36, Sweden
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Svensson K, Mattsson R, James TC, Wentzel P, Pilartz M, MacLaughlin J, Miller SJ, Olsson T, Eriksson UJ, Ohlsson R. The paternal allele of the H19 gene is progressively silenced during early mouse development: the acetylation status of histones may be involved in the generation of variegated expression patterns. Development 1998; 125:61-9. [PMID: 9389664 DOI: 10.1242/dev.125.1.61] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Transcriptional silencing can reflect heritable, epigenetic inactivation of genes, either singly or in groups, during the life-time of an organism. This phenomenon is exemplified by parent-of-origin-specific inactivation events (genomic imprinting) for a subset of mammalian autosomal genes, such as H19. Very little is known, however, about the timing and mechanism(s) of silencing of the paternal H19 allele during mouse development. Using a novel in situ approach, we present evidence that the silencing of the paternal H19 allele is progressive in the trophectodermal lineage during early mouse development and generates variegated expression patterns. The silencing process apparently involves recruitment of histone deacetylases since the mosaic paternal-specific H19 expression reappears in trichostatin A-treated mouse conceptuses, undergoing in vitro organogenesis. Moreover, the paternal H19 alleles of PatDup.d7 placentas, in which a region encompassing the H19 locus of chromosome 7 is bipaternally derived, partially escape the silencing process and are expressed in a variegated manner. We suggest that allele-specific silencing of H19 share some common features with chromatin-mediated silencing in position-effect variegation.
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Affiliation(s)
- K Svensson
- Department of Animal Development and Genetics, Uppsala University, Sweden
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Abstract
An intermediate form of Abutilon mosaic geminivirus, a complex of viral double-stranded DNA (dsDNA) and protein, was characterized by two different techniques. Cesium sulphate gradient centrifugation was used to show that the majority of this form comigrates with host chromatin. Micrococcus nuclease digestion experiments with isolated nuclei demonstrated that the viral dsDNA is organized in a manner comparable to that of host nucleosomes. Results from a previous electron microscopical work (Abouzid, A. M., Frischmuth, T., and H. Jeske, 1988, Mol. Gen. Genet. 212, 252-258) suggested to us that a part of the viral dsDNA must be free of nucleosomes. Whether this nucleosome-free space corresponds to the intergenic region which contains most of the promotor sequences and the putative origin of replication is discussed.
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Affiliation(s)
- M Pilartz
- Institut für Allgemeine Botanik, Angewandte Molekularbiologie der Pflanzen, Hamburg, Germany
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