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Oelschlegel AM, Bhattacharjee R, Wenk P, Harit K, Rothkötter HJ, Koch SP, Boehm-Sturm P, Matuschewski K, Budinger E, Schlüter D, Goldschmidt J, Nishanth G. Beyond the microcirculation: sequestration of infected red blood cells and reduced flow in large draining veins in experimental cerebral malaria. Nat Commun 2024; 15:2396. [PMID: 38493187 PMCID: PMC10944460 DOI: 10.1038/s41467-024-46617-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 02/29/2024] [Indexed: 03/18/2024] Open
Abstract
Sequestration of infected red blood cells (iRBCs) in the microcirculation is a hallmark of cerebral malaria (CM) in post-mortem human brains. It remains controversial how this might be linked to the different disease manifestations, in particular brain swelling leading to brain herniation and death. The main hypotheses focus on iRBC-triggered inflammation and mechanical obstruction of blood flow. Here, we test these hypotheses using murine models of experimental CM (ECM), SPECT-imaging of radiolabeled iRBCs and cerebral perfusion, MR-angiography, q-PCR, and immunohistochemistry. We show that iRBC accumulation and reduced flow precede inflammation. Unexpectedly, we find that iRBCs accumulate not only in the microcirculation but also in large draining veins and sinuses, particularly at the rostral confluence. We identify two parallel venous streams from the superior sagittal sinus that open into the rostral rhinal veins and are partially connected to infected skull bone marrow. The flow in these vessels is reduced early, and the spatial patterns of pathology correspond to venous drainage territories. Our data suggest that venous efflux reductions downstream of the microcirculation are causally linked to ECM pathology, and that the different spatiotemporal patterns of edema development in mice and humans could be related to anatomical differences in venous anatomy.
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Affiliation(s)
- A M Oelschlegel
- Combinatorial NeuroImaging Core Facility, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
- Research group Neuroplasticity, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | - R Bhattacharjee
- Combinatorial NeuroImaging Core Facility, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, 30625, Hannover, Germany
| | - P Wenk
- Combinatorial NeuroImaging Core Facility, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | - K Harit
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, 30625, Hannover, Germany
| | - H-J Rothkötter
- Institute of Anatomy, Medical Faculty, Otto-von-Guericke-University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
| | - S P Koch
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Experimental Neurology and Center for Stroke Research, Charitéplatz 1, 10117, Berlin, Germany
- Charité-Universitätsmedizin Berlin, NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, 10117, Berlin, Germany
- Charité-Universitätsmedizin Berlin, Charité 3R | Replace, Reduce, Refine, Charitéplatz 1, 10117, Berlin, Germany
| | - P Boehm-Sturm
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Experimental Neurology and Center for Stroke Research, Charitéplatz 1, 10117, Berlin, Germany
- Charité-Universitätsmedizin Berlin, NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, 10117, Berlin, Germany
- Charité-Universitätsmedizin Berlin, Charité 3R | Replace, Reduce, Refine, Charitéplatz 1, 10117, Berlin, Germany
| | - K Matuschewski
- Department of Molecular Parasitology, Institute of Biology, Humboldt University, 10115, Berlin, Germany
| | - E Budinger
- Combinatorial NeuroImaging Core Facility, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
- Center of Behavioural Brain Sciences, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - D Schlüter
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, 30625, Hannover, Germany
| | - J Goldschmidt
- Combinatorial NeuroImaging Core Facility, Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany.
- Center of Behavioural Brain Sciences, Universitätsplatz 2, 39106, Magdeburg, Germany.
| | - G Nishanth
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, 30625, Hannover, Germany.
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Nishanth G, Wolleschak D, Fahldieck C, Fischer T, Mullally A, Perner F, Schnöder TM, Just S, Heidel FH, Schlüter D. Gain of function in Jak2 V617F-positive T-cells. Leukemia 2017; 31:1000-1003. [PMID: 28074070 DOI: 10.1038/leu.2017.6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- G Nishanth
- Institute for Medical Microbiology and Hospital Hygiene, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - D Wolleschak
- Department of Hematology and Oncology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - C Fahldieck
- Department of Hematology and Oncology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - T Fischer
- Department of Hematology and Oncology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - A Mullally
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - F Perner
- Department of Hematology and Oncology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.,Innere Medizin II, Hämatologie und Onkologie, Universitätsklinikum Jena, Jena, Germany.,Leibniz-Institute on Aging, Fritz-Lipmann-Institute, Jena, Germany
| | - T M Schnöder
- Innere Medizin II, Hämatologie und Onkologie, Universitätsklinikum Jena, Jena, Germany.,Leibniz-Institute on Aging, Fritz-Lipmann-Institute, Jena, Germany
| | - S Just
- Institute for Medical Microbiology and Hospital Hygiene, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - F H Heidel
- Innere Medizin II, Hämatologie und Onkologie, Universitätsklinikum Jena, Jena, Germany.,Leibniz-Institute on Aging, Fritz-Lipmann-Institute, Jena, Germany
| | - D Schlüter
- Institute for Medical Microbiology and Hospital Hygiene, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.,Organ-Specific Immune Regulation, Helmholtz-Center for Infection Research, Braunschweig, Germany
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Kumar S, Nagarajan M, Sandhu JS, Kumar N, Behl V, Nishanth G. Mitochondrial DNA analyses of Indian water buffalo support a distinct genetic origin of river and swamp buffalo. Anim Genet 2007; 38:227-32. [PMID: 17459014 DOI: 10.1111/j.1365-2052.2007.01602.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [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: 11/28/2022]
Abstract
Water buffalo (Bubalus bubalis) is broadly classified into river and swamp categories, but it remains disputed whether these two types were independently domesticated, or if they are the result of a single domestication event. In this study, we sequenced the mitochondrial D-loop region and cytochrome b gene of 217 and 80 buffalo respectively from eight breeds/locations in northern, north-western, central and southern India and compared our results with published Mediterranean and swamp buffalo sequences. Using these data, river and swamp buffalo were distinguished into two distinct clades. Based upon the existing knowledge of cytogenetic, ecological and phenotypic parameters, molecular data and present-day distribution of the river and swamp buffalo, we suggest that these two types were domesticated independently, and that classification of the river and swamp buffalo as two related subspecies is more appropriate.
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Affiliation(s)
- S Kumar
- Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500007, India.
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