1
|
Azubuike-Osu SO, Kuhs A, Götz P, Faro A, Preissner KT, Arnholdt C, Deindl E. Treatment with Cobra Venom Factor Decreases Ischemic Tissue Damage in Mice. Biomedicines 2024; 12:309. [PMID: 38397911 PMCID: PMC10886846 DOI: 10.3390/biomedicines12020309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/23/2024] [Accepted: 01/27/2024] [Indexed: 02/25/2024] Open
Abstract
Tissue ischemia, caused by the blockage of blood vessels, can result in substantial damage and impaired tissue performance. Information regarding the functional contribution of the complement system in the context of ischemia and angiogenesis is lacking. To investigate the influence of complement activation and depletion upon femoral artery ligation (FAL), Cobra venom factor (CVF) (that functionally resembles C3b, the activated form of complement component C3) was applied in mice in comparison to control mice. Seven days after induction of muscle ischemia through FAL, gastrocnemius muscles of mice were excised and subjected to (immuno-)histological analyses. H&E and apoptotic cell staining (TUNEL) staining revealed a significant reduction in ischemic tissue damage in CVF-treated mice compared to controls. The control mice, however, exhibited a significantly higher capillary-to-muscle fiber ratio and a higher number of proliferating endothelial cells (CD31+/CD45-/BrdU+). The total number of leukocytes (CD45+) substantially decreased in CVF-treated mice versus control mice. Moreover, the CVF-treated group displayed a shift towards the M2-like anti-inflammatory and regenerative macrophage phenotype (CD68+/MRC1+). In conclusion, our findings suggest that treatment with CVF leads to reduced ischemic tissue damage along with decreased leukocyte recruitment but increased numbers of M2-like polarized macrophages, thereby enhancing tissue regeneration, repair, and healing.
Collapse
Affiliation(s)
- Sharon O. Azubuike-Osu
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medicine, Alex Ekwueme Federal University Ndufu Alike, Abakaliki 482131, Ebonyi, Nigeria
| | - Amelie Kuhs
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Anna Faro
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Klaus T. Preissner
- Department of Cardiology, Kerckhoff-Heart Research Institute, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany;
| | - Christoph Arnholdt
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany or (S.O.A.-O.); (A.K.); (P.G.); (A.F.); (C.A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| |
Collapse
|
2
|
Kumaraswami K, Arnholdt C, Deindl E, Lasch M. Rag1 Deficiency Impairs Arteriogenesis in Mice. Int J Mol Sci 2023; 24:12839. [PMID: 37629019 PMCID: PMC10454224 DOI: 10.3390/ijms241612839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/12/2023] [Accepted: 08/13/2023] [Indexed: 08/27/2023] Open
Abstract
Increasing evidence suggests that lymphocytes play distinct roles in inflammation-induced tissue remodeling and tissue damage. Arteriogenesis describes the growth of natural bypasses from pre-existing collateral arteries. This process compensates for the loss of artery function in occlusive arterial diseases. The role of innate immune cells is widely understood in the process of arteriogenesis, whereas the role of lymphocytes remains unclear and is the subject of the present study. To analyze the role of lymphocytes, we induced arteriogenesis in recombination activating gene-1 (Rag1) knockout (KO) mice by unilateral ligation of the femoral artery. The lack of functional lymphocytes in Rag1 KO mice resulted in reduced perfusion recovery as shown by laser Doppler imaging. Additionally, immunofluorescence staining revealed a reduced vascular cell proliferation along with a smaller inner luminal diameter in Rag1 KO mice. The perivascular macrophage polarization around the growing collateral arteries was shifted to more pro-inflammatory M1-like polarized macrophages. Together, these data suggest that lymphocytes are crucial for arteriogenesis by modulating perivascular macrophage polarization.
Collapse
Affiliation(s)
- Konda Kumaraswami
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (K.K.); (C.A.); (M.L.)
- Medical Clinic I, Department of Cardiology, University Hospital, Ludwig Maximilian University, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Christoph Arnholdt
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (K.K.); (C.A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (K.K.); (C.A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (K.K.); (C.A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig Maximilian University, 81377 Munich, Germany
| |
Collapse
|
3
|
Fischer S, Deindl E. State of the Art of Innate Immunity—An Overview. Cells 2022; 11:cells11172705. [PMID: 36078113 PMCID: PMC9454720 DOI: 10.3390/cells11172705] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
The innate immune system is the first line of defense against bacterial and viral infections and sterile inflammation through the recognition of pathogen-associated molecular patterns (PAMPs) as well as danger-associated molecular patterns (DAMPs) by pathogen-recognition receptors (PRRs), and produces proinflammatory and antiviral cytokines and chemokines [...]
Collapse
Affiliation(s)
- Silvia Fischer
- Institute of Biochemistry, Justus-Liebig-University, 35392 Giessen, Germany
- Correspondence: ; Tel.: +49-641-9947440
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-University, Planegg-Martinsried, 82152 Munich, Germany
| |
Collapse
|
4
|
Götz P, Azubuike-Osu SO, Braumandl A, Arnholdt C, Kübler M, Richter L, Lasch M, Bobrowski L, Preissner KT, Deindl E. Cobra Venom Factor Boosts Arteriogenesis in Mice. Int J Mol Sci 2022; 23:ijms23158454. [PMID: 35955584 PMCID: PMC9368946 DOI: 10.3390/ijms23158454] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 01/27/2023] Open
Abstract
Arteriogenesis, the growth of natural bypass blood vessels, can compensate for the loss of arteries caused by vascular occlusive diseases. Accordingly, it is a major goal to identify the drugs promoting this innate immune system-driven process in patients aiming to save their tissues and life. Here, we studied the impact of the Cobra venom factor (CVF), which is a C3-like complement-activating protein that induces depletion of the complement in the circulation in a murine hind limb model of arteriogenesis. Arteriogenesis was induced in C57BL/6J mice by femoral artery ligation (FAL). The administration of a single dose of CVF (12.5 µg) 24 h prior to FAL significantly enhanced the perfusion recovery 7 days after FAL, as shown by Laser Doppler imaging. Immunofluorescence analyses demonstrated an elevated number of proliferating (BrdU+) vascular cells, along with an increased luminal diameter of the grown collateral vessels. Flow cytometric analyses of the blood samples isolated 3 h after FAL revealed an elevated number of neutrophils and platelet-neutrophil aggregates. Giemsa stains displayed augmented mast cell recruitment and activation in the perivascular space of the growing collaterals 8 h after FAL. Seven days after FAL, we found more CD68+/MRC-1+ M2-like polarized pro-arteriogenic macrophages around growing collaterals. These data indicate that a single dose of CVF boosts arteriogenesis by catalyzing the innate immune reactions, relevant for collateral vessel growth.
Collapse
Affiliation(s)
- Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Sharon O. Azubuike-Osu
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medicine, Alex Ekwueme Federal University Ndufu Alike, Abakaliki 482131, Ebonyi, Nigeria
| | - Anna Braumandl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Christoph Arnholdt
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Matthias Kübler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Lisa Richter
- Flow Cytometry Core Facility, Biomedical Center, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany;
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Lisa Bobrowski
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Klaus T. Preissner
- Department of Cardiology, Kerckhoff-Heart Research Institute, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany;
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Correspondence: ; Tel.: +49-(0)-89-2180-76504
| |
Collapse
|
5
|
Kübler M, Götz P, Braumandl A, Beck S, Ishikawa-Ankerhold H, Deindl E. Impact of C57BL/6J and SV-129 Mouse Strain Differences on Ischemia-Induced Postnatal Angiogenesis and the Associated Leukocyte Infiltration in a Murine Hindlimb Model of Ischemia. Int J Mol Sci 2021; 22:ijms222111795. [PMID: 34769229 PMCID: PMC8584150 DOI: 10.3390/ijms222111795] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/23/2021] [Accepted: 10/27/2021] [Indexed: 12/11/2022] Open
Abstract
Strain-related differences in arteriogenesis in inbred mouse strains have already been studied excessively. However, these analyses missed evaluating the mouse strain-related differences in ischemia-induced angiogenic capacities. With the present study, we wanted to shed light on the different angiogenic potentials and the associated leukocyte infiltration of C57BL/6J and SV-129 mice to facilitate the comparison of angiogenesis-related analyses between these strains. For the induction of angiogenesis, we ligated the femoral artery in 8-12-week-old male C57BL/6J and SV-129 mice and performed (immuno-) histological analyses on the ischemic gastrocnemius muscles collected 24 h or 7 days after ligation. As evidenced by hematoxylin and eosin staining, C57BL/6J mice showed reduced tissue damage but displayed an increased capillary-to-muscle fiber ratio and an elevated number of proliferating capillaries (CD31+/BrdU+ cells) compared to SV-129 mice, thus showing improved angiogenesis. Regarding the associated leukocyte infiltration, we found increased numbers of neutrophils (MPO+ cells), NETs (MPO+/CitH3+/DAPI+), and macrophages (CD68+ cells) in SV-129 mice, whereas macrophage polarization (MRC1- vs. MRC1+) and total leukocyte infiltration (CD45+ cells) did not differ between the mouse strains. In summary, we show increased ischemia-induced angiogenic capacities in C57BL/6J mice compared to SV-129 mice, with the latter showing aggravated tissue damage, inflammation, and impaired angiogenesis.
Collapse
Affiliation(s)
- Matthias Kübler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Anna Braumandl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Sebastian Beck
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Hellen Ishikawa-Ankerhold
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Department of Internal Medicine I, Faculty of Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (P.G.); (A.B.); (S.B.); (H.I.-A.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Correspondence: ; Tel.: +49-(0)-89-2180-76504
| |
Collapse
|
6
|
Lasch M, Vladymyrov M, van den Heuvel D, Götz P, Deindl E, Ishikawa-Ankerhold H. Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model. J Vis Exp 2021. [PMID: 34661568 DOI: 10.3791/62969] [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] [Indexed: 10/31/2022] Open
Abstract
Arteriogenesis strongly depends on leukocyte and platelet recruitment to the perivascular space of growing collateral vessels. The standard approach for analyzing collateral arteries and leukocytes in arteriogenesis is ex vivo (immuno-) histological methodology. However, this technique does not allow the measurement of dynamic processes such as blood flow, shear stress, cell-cell interactions, and particle velocity. This paper presents a protocol to monitor in vivo processes in growing collateral arteries during arteriogenesis utilizing intravital imaging. The method described here is a reliable tool for dynamics measurement and offers a high-contrast analysis with minimal photo-cytotoxicity, provided by multiphoton excitation microscopy. Prior to analyzing growing collateral arteries, arteriogenesis was induced in the adductor muscle of mice by unilateral ligation of the femoral artery. After the ligation, the preexisting collateral arteries started to grow due to increased shear stress. Twenty-four hours after surgery, the skin and subcutaneous fat above the collateral arteries were removed, constructing a pocket for further analyses. To visualize blood flow and immune cells during in vivo imaging, CD41-fluorescein isothiocyanate (FITC) (platelets) and CD45-phycoerythrin (PE) (leukocytes) antibodies were injected intravenously (i.v.) via a catheter placed in the tail vein of a mouse. This article introduces intravital multiphoton imaging as an alternative or in vivo complementation to the commonly used static ex vivo (immuno-) histological analyses to study processes relevant for arteriogenesis. In summary, this paper describes a novel and dynamic in vivo method to investigate immune cell trafficking, blood flow, and shear stress in a hindlimb model of arteriogenesis, which enhances evaluation possibilities notably.
Collapse
Affiliation(s)
- Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München; Department of Otorhinolaryngology, Head & Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München; Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München
| | | | - Dominic van den Heuvel
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München; Department of Internal Medicine I and Cardiology, University Hospital, Ludwig-Maximilians-Universität München
| | - Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München; Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München; Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München
| | - Hellen Ishikawa-Ankerhold
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München; Department of Internal Medicine I and Cardiology, University Hospital, Ludwig-Maximilians-Universität München;
| |
Collapse
|
7
|
Kübler M, Beck S, Peffenköver LL, Götz P, Ishikawa-Ankerhold H, Preissner KT, Fischer S, Lasch M, Deindl E. The Absence of Extracellular Cold-Inducible RNA-Binding Protein (eCIRP) Promotes Pro-Angiogenic Microenvironmental Conditions and Angiogenesis in Muscle Tissue Ischemia. Int J Mol Sci 2021; 22:ijms22179484. [PMID: 34502391 PMCID: PMC8431021 DOI: 10.3390/ijms22179484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 12/11/2022] Open
Abstract
Extracellular Cold-inducible RNA-binding protein (eCIRP), a damage-associated molecular pattern, is released from cells upon hypoxia and cold-stress. The overall absence of extra- and intracellular CIRP is associated with increased angiogenesis, most likely induced through influencing leukocyte accumulation. The aim of the present study was to specifically characterize the role of eCIRP in ischemia-induced angiogenesis together with the associated leukocyte recruitment. For analyzing eCIRPs impact, we induced muscle ischemia via femoral artery ligation (FAL) in mice in the presence or absence of an anti-CIRP antibody and isolated the gastrocnemius muscle for immunohistological analyses. Upon eCIRP-depletion, mice showed increased capillary/muscle fiber ratio and numbers of proliferating endothelial cells (CD31+/CD45−/BrdU+). This was accompanied by a reduction of total leukocyte count (CD45+), neutrophils (MPO+), neutrophil extracellular traps (NETs) (MPO+CitH3+), apoptotic area (ascertained via TUNEL assay), and pro-inflammatory M1-like polarized macrophages (CD68+/MRC1−) in ischemic muscle tissue. Conversely, the number of regenerative M2-like polarized macrophages (CD68+/MRC1+) was elevated. Altogether, we observed that eCIRP depletion similarly affected angiogenesis and leukocyte recruitment as described for the overall absence of CIRP. Thus, we propose that eCIRP is mainly responsible for modulating angiogenesis via promoting pro-angiogenic microenvironmental conditions in muscle ischemia.
Collapse
Affiliation(s)
- Matthias Kübler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig- Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Sebastian Beck
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig- Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Lisa Lilian Peffenköver
- Department of Biochemistry, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany; (L.L.P.); (K.T.P.); (S.F.)
| | - Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig- Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Hellen Ishikawa-Ankerhold
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Department of Internal Medicine I, Faculty of Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Klaus T. Preissner
- Department of Biochemistry, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany; (L.L.P.); (K.T.P.); (S.F.)
| | - Silvia Fischer
- Department of Biochemistry, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany; (L.L.P.); (K.T.P.); (S.F.)
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig- Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (M.K.); (S.B.); (P.G.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig- Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Correspondence: ; Tel.: +49-(0)-89-2180-76504
| |
Collapse
|
8
|
Chen CS, Weber J, Holtkamp SJ, Ince LM, de Juan A, Wang C, Lutes L, Barnoud C, Kizil B, Hergenhan SM, Salvermoser J, Lasch M, Deindl E, Schraml B, Baumjohann D, Scheiermann C. Loss of direct adrenergic innervation after peripheral nerve injury causes lymph node expansion through IFN-γ. J Exp Med 2021; 218:e20202377. [PMID: 34086056 PMCID: PMC8185988 DOI: 10.1084/jem.20202377] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 02/19/2021] [Accepted: 05/03/2021] [Indexed: 11/04/2022] Open
Abstract
Peripheral nerve injury can cause debilitating disease and immune cell-mediated destruction of the affected nerve. While the focus has been on the nerve-regenerative response, the effect of loss of innervation on lymph node function is unclear. Here, we show that the popliteal lymph node (popLN) receives direct neural input from the sciatic nerve and that sciatic denervation causes lymph node expansion. Loss of sympathetic, adrenergic tone induces the expression of IFN-γ in LN CD8 T cells, which is responsible for LN expansion. Surgery-induced IFN-γ expression and expansion can be rescued by β2 adrenergic receptor agonists but not sensory nerve agonists. These data demonstrate the mechanisms governing the pro-inflammatory effect of loss of direct adrenergic input on lymph node function.
Collapse
Affiliation(s)
- Chien-Sin Chen
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Jasmin Weber
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Stephan Jonas Holtkamp
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Louise Madeleine Ince
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Alba de Juan
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Chen Wang
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Lydia Lutes
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Coline Barnoud
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Burak Kizil
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Sophia Martina Hergenhan
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Johanna Salvermoser
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Manuel Lasch
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
| | - Elisabeth Deindl
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
| | - Barbara Schraml
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Dirk Baumjohann
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Medical Clinic III for Oncology, Hematology, Immuno-Oncology and Rheumatology, University Hospital Bonn, University of Bonn, Bonn, Germany
| | - Christoph Scheiermann
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| |
Collapse
|
9
|
Götz P, Braumandl A, Kübler M, Kumaraswami K, Ishikawa-Ankerhold H, Lasch M, Deindl E. C3 Deficiency Leads to Increased Angiogenesis and Elevated Pro-Angiogenic Leukocyte Recruitment in Ischemic Muscle Tissue. Int J Mol Sci 2021; 22:5800. [PMID: 34071589 PMCID: PMC8198161 DOI: 10.3390/ijms22115800] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 12/24/2022] Open
Abstract
The complement system is a potent inflammatory trigger, activator, and chemoattractant for leukocytes, which play a crucial role in promoting angiogenesis. However, little information is available about the influence of the complement system on angiogenesis in ischemic muscle tissue. To address this topic and analyze the impact of the complement system on angiogenesis, we induced muscle ischemia in complement factor C3 deficient (C3-/-) and wildtype control mice by femoral artery ligation (FAL). At 24 h and 7 days after FAL, we isolated the ischemic gastrocnemius muscles and investigated them by means of (immuno-)histological analyses. C3-/- mice showed elevated ischemic damage 7 days after FAL, as evidenced by H&E staining. In addition, angiogenesis was increased in C3-/- mice, as demonstrated by increased capillary/muscle fiber ratio and increased proliferating endothelial cells (CD31+/BrdU+). Moreover, our results showed that the total number of leukocytes (CD45+) was increased in C3-/- mice, which was based on an increased number of neutrophils (MPO+), neutrophil extracellular trap formation (MPO+/CitH3+), and macrophages (CD68+) displaying a shift toward an anti-inflammatory and pro-angiogenic M2-like polarized phenotype (CD68+/MRC1+). In summary, we show that the deficiency of complement factor C3 increased neutrophil and M2-like polarized macrophage accumulation in ischemic muscle tissue, contributing to angiogenesis.
Collapse
Affiliation(s)
- Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Anna Braumandl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Matthias Kübler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Konda Kumaraswami
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Hellen Ishikawa-Ankerhold
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Department of Internal Medicine I, Faculty of Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); (A.B.); (M.K.); (K.K.); (H.I.-A.); (M.L.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| |
Collapse
|
10
|
Preissner KT, Fischer S, Deindl E. Extracellular RNA as a Versatile DAMP and Alarm Signal That Influences Leukocyte Recruitment in Inflammation and Infection. Front Cell Dev Biol 2020; 8:619221. [PMID: 33392206 PMCID: PMC7775424 DOI: 10.3389/fcell.2020.619221] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/30/2020] [Indexed: 12/11/2022] Open
Abstract
Upon vascular injury, tissue damage, ischemia, or microbial infection, intracellular material such as nucleic acids and histones is liberated and comes into contact with the vessel wall and circulating blood cells. Such "Danger-associated molecular patterns" (DAMPs) may thus have an enduring influence on the inflammatory defense process that involves leukocyte recruitment and wound healing reactions. While different species of extracellular RNA (exRNA), including microRNAs and long non-coding RNAs, have been implicated to influence inflammatory processes at different levels, recent in vitro and in vivo work has demonstrated a major impact of ribosomal exRNA as a prominent DAMP on various steps of leukocyte recruitment within the innate immune response. This includes the induction of vascular hyper-permeability and vasogenic edema by exRNA via the activation of the "vascular endothelial growth factor" (VEGF) receptor-2 system, as well as the recruitment of leukocytes to the inflamed endothelium, the M1-type polarization of inflammatory macrophages, or the role of exRNA as a pro-thrombotic cofactor to promote thrombosis. Beyond sterile inflammation, exRNA also augments the docking of bacteria to host cells and the subsequent microbial invasion. Moreover, upon vessel occlusion and ischemia, the shear stress-induced release of exRNA initiates arteriogenesis (i.e., formation of natural vessel bypasses) in a multistep process that resembles leukocyte recruitment. Although exRNA can be counteracted for by natural circulating RNase1, under the conditions mentioned, only the administration of exogenous, thermostable, non-toxic RNase1 provides an effective and safe therapeutic regimen for treating the damaging activities of exRNA. It remains to be investigated whether exRNA may also influence viral infections (including COVID-19), e.g., by supporting the interaction of host cells with viral particles and their subsequent invasion. In fact, as a consequence of the viral infection cycle, massive amounts of exRNA are liberated, which can provoke further tissue damage and enhance virus dissemination. Whether the application of RNase1 in this scenario may help to limit the extent of viral infections like COVID-19 and impact on leukocyte recruitment and emigration steps in immune defense in order to limit the extent of associated cardiovascular diseases remains to be studied.
Collapse
Affiliation(s)
- Klaus T. Preissner
- Department of Biochemistry, Medical School, Justus Liebig University Giessen, Giessen, Germany
- Kerckhoff-Heart-Research-Institute, Department of Cardiology, Medical School, Justus Liebig University Giessen, Giessen, Germany
| | - Silvia Fischer
- Department of Biochemistry, Medical School, Justus Liebig University Giessen, Giessen, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, Munich, Germany
| |
Collapse
|
11
|
Lasch M, Kumaraswami K, Nasiscionyte S, Kircher S, van den Heuvel D, Meister S, Ishikawa-Ankerhold H, Deindl E. RNase A Treatment Interferes With Leukocyte Recruitment, Neutrophil Extracellular Trap Formation, and Angiogenesis in Ischemic Muscle Tissue. Front Physiol 2020; 11:576736. [PMID: 33240100 PMCID: PMC7677187 DOI: 10.3389/fphys.2020.576736] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 10/16/2020] [Indexed: 01/13/2023] Open
Abstract
Background: RNase A (the bovine equivalent to human RNase 1) and RNase 5 (angiogenin) are two closely related ribonucleases. RNase 5 is described as a powerful angiogenic factor. Whether RNase A shares the same angiogenic characteristic, or interferes with vessel growth as demonstrated for arteriogenesis, has never been investigated and is the topic of this present study. Methods and Results: To investigate whether RNase A shows a pro‐ or anti-angiogenic effect, we employed a murine hindlimb model, in which femoral artery ligation (FAL) results in arteriogenesis in the upper leg, and, due to provoked ischemia, in angiogenesis in the lower leg. C57BL/6J male mice underwent unilateral FAL, whereas the contralateral leg was sham operated. Two and seven days after the surgery and intravenous injection of RNase A (50 μg/kg dissolved in saline) or saline (control), the gastrocnemius muscles of mice were isolated from the lower legs for (immuno-) histological analyses. Hematoxylin and Eosin staining evidenced that RNase A treatment resulted in a higher degree of ischemic tissue damage. This was, however, associated with reduced angiogenesis, as evidenced by a reduced capillary/muscle fiber ratio. Moreover, RNase A treatment was associated with a significant reduction in leukocyte infiltration as shown by CD45+ (pan-leukocyte marker), Ly6G+ or MPO+ (neutrophils), MPO+/CitH3+ [neutrophil extracellular traps (NETs)], and CD68+ (macrophages) staining. CD68/MRC1 double staining revealed that RNase A treated mice showed a reduced percentage of M1-like polarized (CD68+/MRC1−) macrophages whereas the percentage of M2-like polarized (CD68+/MRC1+) macrophages was increased. Conclusion: In contrast to RNase 5, RNase A interferes with angiogenesis, which is linked to reduced leukocyte infiltration and NET formation.
Collapse
Affiliation(s)
- Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.,Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, Munich, Germany.,Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Konda Kumaraswami
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.,Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Simona Nasiscionyte
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Susanna Kircher
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.,Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Dominic van den Heuvel
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Sarah Meister
- Department of Obstetrics and Gynaecology, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Hellen Ishikawa-Ankerhold
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.,Department of Internal Medicine I, Faculty of Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.,Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, Munich, Germany
| |
Collapse
|
12
|
Affiliation(s)
- Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany
- Correspondence: (E.D.); (P.H.A.Q.); Tel.: +49-89-2180-76504 (E.D.); +31-71-526-1584 (P.H.A.Q.)
| | - Paul H. A. Quax
- Department of Surgery, Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
- Correspondence: (E.D.); (P.H.A.Q.); Tel.: +49-89-2180-76504 (E.D.); +31-71-526-1584 (P.H.A.Q.)
| |
Collapse
|
13
|
Kumaraswami K, Salei N, Beck S, Rambichler S, Kluever AK, Lasch M, Richter L, Schraml BU, Deindl E. A Simple and Effective Flow Cytometry-Based Method for Identification and Quantification of Tissue Infiltrated Leukocyte Subpopulations in a Mouse Model of Peripheral Arterial Disease. Int J Mol Sci 2020; 21:ijms21103593. [PMID: 32438752 PMCID: PMC7279164 DOI: 10.3390/ijms21103593] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 05/16/2020] [Indexed: 01/25/2023] Open
Abstract
Arteriogenesis, the growth of a natural bypass from pre-existing arteriolar collaterals, is an endogenous mechanism to compensate for the loss of an artery. Mechanistically, this process relies on a locally and temporally restricted perivascular infiltration of leukocyte subpopulations, which mediate arteriogenesis by supplying growth factors and cytokines. Currently, the state-of-the-art method to identify and quantify these leukocyte subpopulations in mouse models is immunohistology. However, this is a time consuming procedure. Here, we aimed to develop an optimized protocol to identify and quantify leukocyte subpopulations by means of flow cytometry in adductor muscles containing growing collateral arteries. For that purpose, adductor muscles of murine hindlimbs were isolated at day one and three after induction of arteriogenesis, enzymatically digested, and infiltrated leukocyte subpopulations were identified and quantified by flow cytometry, as exemplary shown for neutrophils and macrophages (defined as CD45+/CD11b+/Ly6G+ and CD45+/CD11b+/F4/80+ cells, respectively). In summary, we show that flow cytometry is a suitable method to identify and quantify leukocyte subpopulations in muscle tissue, and provide a detailed protocol. Flow cytometry constitutes a timesaving tool compared to histology, which might be used in addition for precise localization of leukocytes in tissue samples.
Collapse
Affiliation(s)
- Konda Kumaraswami
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Natallia Salei
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Sebastian Beck
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Stephan Rambichler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Anna-Kristina Kluever
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head & Neck Surgery, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Lisa Richter
- Core Facility Flow Cytometry, Biomedical Centre, LMU Munich, 82152 Planegg-Martinsried, Germany;
| | - Barbara U. Schraml
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; (K.K.); (N.S.); (S.B.); (S.R.); (A.-K.K.); (M.L.); (B.U.S.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, LMU Munich, 82152 Planegg-Martinsried, Germany
- Correspondence: ; Tel.: +49-89-2180-76504
| |
Collapse
|
14
|
Kluever AK, Braumandl A, Fischer S, Preissner KT, Deindl E. The Extraordinary Role of Extracellular RNA in Arteriogenesis, the Growth of Collateral Arteries. Int J Mol Sci 2019; 20:ijms20246177. [PMID: 31817879 PMCID: PMC6940760 DOI: 10.3390/ijms20246177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 01/13/2023] Open
Abstract
Arteriogenesis is an intricate process in which increased shear stress in pre-existing arteriolar collaterals induces blood vessel expansion, mediated via endothelial cell activation, leukocyte recruitment and subsequent endothelial and smooth muscle cell proliferation. Extracellular RNA (eRNA), released from stressed cells or damaged tissue under pathological conditions, has recently been discovered to be liberated from endothelial cells in response to increased shear stress and to promote collateral growth. Until now, eRNA has been shown to enhance coagulation and inflammation by inducing cytokine release, leukocyte recruitment, and endothelial permeability, the latter being mediated by vascular endothelial growth factor (VEGF) signaling. In the context of arteriogenesis, however, eRNA has emerged as a transmitter of shear stress into endothelial activation, mediating the sterile inflammatory process essential for collateral remodeling, whereby the stimulatory effects of eRNA on the VEGF signaling axis seem to be pivotal. In addition, eRNA might influence subsequent steps of the arteriogenesis cascade as well. This article provides a comprehensive overview of the beneficial effects of eRNA during arteriogenesis, laying the foundation for further exploration of the connection between the damaging and non-damaging effects of eRNA in the context of cardiovascular occlusive diseases and of sterile inflammation.
Collapse
Affiliation(s)
- Anna-Kristina Kluever
- Walter-Brendel-Center of Experimental Medicine, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (A.-K.K.); (A.B.)
| | - Anna Braumandl
- Walter-Brendel-Center of Experimental Medicine, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (A.-K.K.); (A.B.)
| | - Silvia Fischer
- Institute of Biochemistry, Medical School, Justus-Liebig-University, 35392 Giessen, Germany; (S.F.); (K.T.P.)
| | - Klaus T. Preissner
- Institute of Biochemistry, Medical School, Justus-Liebig-University, 35392 Giessen, Germany; (S.F.); (K.T.P.)
| | - Elisabeth Deindl
- Walter-Brendel-Center of Experimental Medicine, University Hospital, Ludwig-Maximilians-University, 81377 Munich, Germany; (A.-K.K.); (A.B.)
- Correspondence: ; Tel.: +49-89-2180-76504
| |
Collapse
|
15
|
Wagner M, Mahlmann A, Deindl E, Zuschratter W, Riek-Burchardt M, Kostin S, Luani B, Baer C, Youssef A, Herold J. Clinical improvement and enhanced collateral vessel growth after xenogenic monocyte transplantation. Am J Transl Res 2019; 11:4063-4076. [PMID: 31396318 PMCID: PMC6684892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 06/07/2019] [Indexed: 06/10/2023]
Abstract
Background: Monocytes (Mo) are the most important mediators in arteriogenesis. Previous results from our group demonstrated the great potential of allogenic Mo transplantation for improving collateral vessel growth, which appeared to be due to a considerable host vs. graft reaction. To prove this hypothesis and introduce this new method in clinical practice, we performed transplantation of human Mo (HuMo) in a mouse model. Methods and results: We ligated the femoral artery of BALB/c mice and transplanted Mo via the tail vein. Perfusion was measured by laser Doppler perfusion imaging (LDPI). We also performed clinical scoring based on behavior, wound healing, signs of inflammation and mobility of the ligated extremity. Finally, arteriogenesis and angiogenesis were examined histologically and by quantitative RT-PCR of the hind limb musculature. LDPI increased within one week after ligation when HuMo were transplanted and increased further up to day 21 (0.63±0.12 (n=12) in HuMo vs. 0.50±0.12 (n=17) in the control group (P<0.01)). A histological evaluation showed significantly more collateral arteries within the adductor muscles after HuMo transplantation. The promotion of collateral vessel growth after HuMo transplantation resulted in better clinical scores (0.33±0.26 (n=12) vs. 3.3 (n=9), SEM; P<0.01). Conclusions: Transplantation of HuMo improves collateral vessel growth and clinical outcomes in mice. These results verify our hypothesis that controlled triggering of the inflammatory mechanism resulted in collateral vessel growth by a local host vs. a graft reaction in the ischemic hind limbs and could represent a further step in the development of a clinical strategy for promoting arteriogenesis.
Collapse
Affiliation(s)
- Martin Wagner
- Department of Cardiology and Angiology, Otto-von-Guericke University of MagdeburgMagdeburg, Germany
| | - Adrian Mahlmann
- Department of Medicine - Section Angiology, Carl Gustav Carus University of DresdenGermany
| | - Elisabeth Deindl
- Department of Experimental Medicine, Walter Brendel CentreMunich, Germany
| | | | - Monika Riek-Burchardt
- Institute of Molecular and Clinical Immunology, Otto von Guericke University of MagdeburgMagdeburg, Germany
| | | | - Blerim Luani
- Department of Cardiology and Angiology, Otto-von-Guericke University of MagdeburgMagdeburg, Germany
| | - Claudia Baer
- Department of Cardiology and Angiology, Otto-von-Guericke University of MagdeburgMagdeburg, Germany
| | - Akram Youssef
- Department for Internal Medicine and Cardiology, University of DresdenGermany
| | - Joerg Herold
- Department of Cardiology and Angiology, Otto-von-Guericke University of MagdeburgMagdeburg, Germany
- Department of Vascular Medicine, Klinikum Darmstadt GmbH, Max-Ratschow Clinic for AngiologyDarmstadt, Germany
| |
Collapse
|
16
|
Buchheim JI, Hoskyns S, Moser D, Han B, Deindl E, Hörl M, Biere K, Feuerecker M, Schelling G, Choukèr A. Oxidative burst and Dectin-1-triggered phagocytosis affected by norepinephrine and endocannabinoids: implications for fungal clearance under stress. Int Immunol 2019; 30:79-89. [PMID: 29329391 DOI: 10.1093/intimm/dxy001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 01/06/2018] [Indexed: 12/12/2022] Open
Abstract
A prolonged stress burden is known to hamper the efficiency of both the innate and the adaptive immune systems and to attenuate the stress responses by the catecholaminergic and endocannabinoid (EC) systems. Key mechanisms of innate immunity are the eradication of pathogens through phagocytosis and the respiratory burst. We tested the concentration-dependent, spontaneous and stimulated (via TNFα and N-formylmethionine-leucyl-phenylalanine) release of reactive oxygen species (ROS) by human polymorphonuclear leukocytes (PMNs) in vitro in response to norepinephrine (NE) and AM1241, a pharmacological ligand for the EC receptor CB2. We evaluated phagocytosis of Dectin-1 ligating zymosan particles and tested the cytokine response against Candida antigen in an in vitro cytokine release assay. Increasing concentrations of NE did not affect phagocytosis, yet stimulated ROS release was attenuated gradually reaching maximum suppression at 500 nM. Adrenergic receptor (AR) mechanisms using non-AR-selective (labetalol) as well as specific α-(prazosin) and β-(propranolol) receptor antagonists were tested. Results show that only labetalol and propranolol were able to recuperate cytotoxicity in the presence of NE, evidencing a β-receptor-mediated effect. The CB2 agonist, AM1241, inhibited phagocytosis at 10 µM and spontaneous peroxide release by PMNs. Use of the inverse CB2 receptor agonist SR144528 led to partial recuperation of ROS production, confirming the functional role of CB2. Additionally, AM1241 delayed early activation of monocytes and induced suppression of IL-2 and IL-6 levels in response to Candida via lower activity of mammalian target of rapamycin (mTOR). These findings provide new insights into key mechanisms of innate immunity under stressful conditions where ligands to the sympatho-adrenergic and EC system are released.
Collapse
Affiliation(s)
- Judith-Irina Buchheim
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Spencer Hoskyns
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany.,Centre of Human and Aerospace Physiological Sciences, Kings College London, UK
| | - Dominique Moser
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Bing Han
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | | | - Marion Hörl
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Katharina Biere
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Matthias Feuerecker
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Gustav Schelling
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany
| | - Alexander Choukèr
- Laboratory of Translational Research 'Stress and Immunity', Department of Anaesthesiology, Hospital of the University of Munich, Ludwig-Maximilians-University, Germany.,Centre of Human and Aerospace Physiological Sciences, Kings College London, UK
| |
Collapse
|
17
|
Kluever AK, Deindl E. Extracellular RNA, a Potential Drug Target for Alleviating Atherosclerosis, Ischemia/Reperfusion Injury and Organ Transplantation. Curr Pharm Biotechnol 2019; 19:1189-1195. [DOI: 10.2174/1389201020666190102150610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/07/2018] [Accepted: 12/18/2018] [Indexed: 11/22/2022]
Affiliation(s)
- Anna-Kristina Kluever
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| |
Collapse
|
18
|
Elsemüller AK, Tomalla V, Gärtner U, Troidl K, Jeratsch S, Graumann J, Baal N, Hackstein H, Lasch M, Deindl E, Preissner KT, Fischer S. Characterization of mast cell-derived rRNA-containing microvesicles and their inflammatory impact on endothelial cells. FASEB J 2019; 33:5457-5467. [PMID: 30702929 DOI: 10.1096/fj.201801853rr] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Tissue-resident mast cells (MCs) are well known for their role in inflammatory responses and allergic and anaphylactic reactions, but they also contribute to processes of arterial remodeling. Although ribosomes and cytosolic RNAs are located around secretory granules in mature MCs, their functional role in MC responses remains unexplored. Previous studies by our group characterized extracellular RNA (eRNA) as an inflammatory and pathogenetic factor in vitro and in vivo. In the present study, RNA-containing MCs and eRNA were located in close proximity to growing collateral arteries in vivo. In vitro, various agonists were found to induce the degranulation of MCs and the concomitant release of eRNA in association with microvesicles (MVs). The liberation of eRNA from MCs was abolished by MC stabilizers or by preventing the increase of intracellular Ca2+ in MCs. eRNA was found to be mainly contained inside MVs, as demonstrated by electron microscopy and immunocytochemistry. The exposure to and the uptake of MC-released MVs by cultured endothelial cells increased their expression of cytokines, such as monocyte chemoattractant protein or IL-6, in a dose- and time-dependent manner. These results indicate that RNA-containing MC-derived MVs are likely to be involved in inflammatory responses, relevant, for example, to processes of vascular remodeling.-Elsemüller, A.-K., Tomalla, V., Gärtner, U., Troidl, K., Jeratsch, S., Graumann, J., Baal, N., Hackstein, H., Lasch, M., Deindl, E., Preissner, K. T., Fischer, S. Characterization of mast cell-derived rRNA-containing microvesicles and their inflammatory impact on endothelial cells.
Collapse
Affiliation(s)
| | - Vanessa Tomalla
- Department of Biochemistry, Medical Faculty, Justus Liebig University, Giessen, Germany
| | - Ulrich Gärtner
- Department of Anatomy and Cell Biology, Justus Liebig University, Giessen, Germany
| | - Kerstin Troidl
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Department of Vascular and Endovascular Surgery, University Hospital Frankfurt, Frankfurt, Germany
| | - Sylvia Jeratsch
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Johannes Graumann
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Nelli Baal
- Department of Clinical Immunology and Transfusion Medicine, Medical Faculty, Justus Liebig University, Giessen, Germany
| | - Holger Hackstein
- Department of Transfusion Medicine and Haemostaseology, University Hospital Erlangen-Friedrich Alexander University, Erlangen, Germany
| | - Manuel Lasch
- Walter Brendel Centre of Experimental Medicine, Medical Center of the University of Munich-Ludwig Maximilian University, Munich, Germany; and.,Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig Maximilian University, Munich, Germany
| | - Elisabeth Deindl
- Walter Brendel Centre of Experimental Medicine, Medical Center of the University of Munich-Ludwig Maximilian University, Munich, Germany; and
| | - Klaus T Preissner
- Department of Biochemistry, Medical Faculty, Justus Liebig University, Giessen, Germany
| | - Silvia Fischer
- Department of Biochemistry, Medical Faculty, Justus Liebig University, Giessen, Germany
| |
Collapse
|
19
|
Weckbach LT, Preissner KT, Deindl E. The Role of Midkine in Arteriogenesis, Involving Mechanosensing, Endothelial Cell Proliferation, and Vasodilation. Int J Mol Sci 2018; 19:E2559. [PMID: 30158425 PMCID: PMC6163309 DOI: 10.3390/ijms19092559] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/17/2018] [Accepted: 08/22/2018] [Indexed: 12/12/2022] Open
Abstract
Mechanical forces in blood circulation such as shear stress play a predominant role in many physiological and pathophysiological processes related to vascular responses or vessel remodeling. Arteriogenesis, defined as the growth of pre-existing arterioles into functional collateral arteries compensating for stenosed or occluded arteries, is such a process. Midkine, a pleiotropic protein and growth factor, has originally been identified to orchestrate embryonic development. In the adult organism its expression is restricted to distinct tissues (including tumors), whereby midkine is strongly expressed in inflamed tissue and has been shown to promote inflammation. Recent investigations conferred midkine an important function in vascular remodeling and growth. In this review, we introduce the midkine gene and protein along with its cognate receptors, and highlight its role in inflammation and the vascular system with special emphasis on arteriogenesis, particularly focusing on shear stress-mediated vascular cell proliferation and vasodilatation.
Collapse
Affiliation(s)
- Ludwig T Weckbach
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, LMU Munich, 81377 Munich, Germany.
- Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, 82152 Planegg-Martinsried, Germany.
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany.
| | - Klaus T Preissner
- Institute of Biochemistry, Medical School, Justus-Liebig-University, 35390 Giessen, Germany.
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany.
| |
Collapse
|
20
|
Lasch M, Nekolla K, Klemm AH, Buchheim JI, Pohl U, Dietzel S, Deindl E. Estimating hemodynamic shear stress in murine peripheral collateral arteries by two-photon line scanning. Mol Cell Biochem 2018; 453:41-51. [PMID: 30128948 DOI: 10.1007/s11010-018-3430-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 08/16/2018] [Indexed: 12/20/2022]
Abstract
Changes in wall shear stress of blood vessels are assumed to be an important component of many physiological and pathophysiological processes. However, due to technical limitations experimental in vivo data are rarely available. Here, we investigated two-photon excitation fluorescence microscopy as an option to measure vessel diameter as well as blood flow velocities in a murine hindlimb model of arteriogenesis (collateral artery growth). Using line scanning at high frequencies, we measured the movement of blood cells along the vessel axis. We found that peak systolic blood flow velocity averaged 9 mm/s and vessel diameter 42 µm in resting collaterals. Induction of arteriogenesis by femoral artery ligation resulted in a significant increase in centerline peak systolic velocity after 1 day with an average of 51 mm/s, whereas the averaged luminal diameter of collaterals (52 µm) changed much less. Thereof calculations revealed a significant fourfold increase in hemodynamic wall shear rate. Our results indicate that two-photon line scanning is a suitable tool to estimate wall shear stress e.g., in experimental animal models, such as of arteriogenesis, which may not only help to understand the relevance of mechanical forces in vivo, but also to adjust wall shear stress in ex vivo investigations on isolated vessels as well as cell culture experiments.
Collapse
Affiliation(s)
- Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.,Department of Otorhinolaryngology, Head & Neck Surgery, Klinikum der Universität München, Ludwig- Maximilians-Universität München, Munich, Germany
| | - Katharina Nekolla
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany
| | - Anna H Klemm
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.,Core Facility Bioimaging at the Biomedical Center, LMU Munich, Planegg-Martinsried, Germany
| | - Judith-Irina Buchheim
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.,Department of Anesthesiology, Laboratory for Stress and Immunity, Hospital of the University of the LMU Munich, Munich, Germany
| | - Ulrich Pohl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.,Core Facility Bioimaging at the Biomedical Center, LMU Munich, Planegg-Martinsried, Germany.,German Center for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Steffen Dietzel
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.,Core Facility Bioimaging at the Biomedical Center, LMU Munich, Planegg-Martinsried, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Marchioninistr.15, 81377, Munich, Germany.
| |
Collapse
|
21
|
Kluever AK, Deindl E. Extracellular Nucleic Acids in Health and Disease. Curr Pharm Biotechnol 2018; 19:1180-1181. [PMID: 30838964 DOI: 10.2174/138920101915190125142421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Anna-Kristina Kluever
- Walter-Brendel-Centre of Experimental Medicine, University hospital, LMU Munich, Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University hospital, LMU Munich, Munich, Germany
| |
Collapse
|
22
|
Abstract
SummaryIn recent years intensive investigations have been performed to unravel the molecular mechanisms of collateral artery growth (arteriogenesis), a process designed by nature to compensate the devastating consequences of major arterial occlusions. Currently, a variety of gene products as well as signal transduction pathways involved in arteriogenesis have been identified. However, it is still not clear how the progression of cellular signals evoked by an increased blood flow and therefore mechanical stress proceeds. Literature research identified the transcription factors early growth response-1 (Egr-1) as well as serum response factor (SRF) and myocardin-related transcription factors (MRTFs) as liaisons connecting the key pathways of arteriogenesis, i.e.the Rho-kinase pathway and the MEK/ERK pathway, with each other as well as with downstream genes.
Collapse
|
23
|
Lautz T, Lasch M, Borgolte J, Troidl K, Pagel JI, Caballero-Martinez A, Kleinert EC, Walzog B, Deindl E. Midkine Controls Arteriogenesis by Regulating the Bioavailability of Vascular Endothelial Growth Factor A and the Expression of Nitric Oxide Synthase 1 and 3. EBioMedicine 2017; 27:237-246. [PMID: 29233575 PMCID: PMC5828057 DOI: 10.1016/j.ebiom.2017.11.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/21/2017] [Accepted: 11/21/2017] [Indexed: 01/30/2023] Open
Abstract
Midkine is a pleiotropic factor, which is involved in angiogenesis. However, its mode of action in this process is still ill defined. The function of midkine in arteriogenesis, the growth of natural bypasses from pre-existing collateral arteries, compensating for the loss of an occluded artery has never been investigated. Arteriogenesis is an inflammatory process, which relies on the proliferation of endothelial cells and smooth muscle cells. We show that midkine deficiency strikingly interferes with the proliferation of endothelial cells in arteriogenesis, thereby interfering with the process of collateral artery growth. We identified midkine to be responsible for increased plasma levels of vascular endothelial growth factor A (VEGFA), necessary and sufficient to promote endothelial cell proliferation in growing collaterals. Mechanistically, we demonstrate that leukocyte domiciled midkine mediates increased plasma levels of VEGFA relevant for upregulation of endothelial nitric oxide synthase 1 and 3, necessary for proper endothelial cell proliferation, and that non-leukocyte domiciled midkine additionally improves vasodilation. The data provided on the role of midkine in endothelial proliferation are likely to be relevant for both, the process of arteriogenesis and angiogenesis. Moreover, our data might help to estimate the therapeutic effect of clinically applied VEGFA in patients with vascular occlusive diseases. Leukocyte domiciled midkine is decisive for collateral endothelial cell proliferation in arteriogenesis. Midkine controls the bioavailability of VEGFA mediating endothelial Nos1 and Nos3 expression. Nos1 and Nos3, relevant for endothelial cell proliferation, can substitute for each other.
Arteriogenesis is a life and tissue saving process as it compensates for the loss of an occluded artery. Decoding the underlying molecular mechanisms is a prerequisite for the development of novel therapeutic options to treat patients with vascular occlusive diseases. Lautz et al. identified midkine to be responsible for the increased bioavailability of VEGFA during arteriogenesis, necessary and sufficient to promote endothelial cell proliferation. These data might help to estimate the therapeutic effect of clinically applied VEGFA. As the identified mechanisms might also apply for angiogenesis, they are likely to be of broader relevance, e.g. in terms of tumor treatment.
Collapse
Affiliation(s)
- Thomas Lautz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Biomedical Center, LMU Munich, 81377 Munich, Germany
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Biomedical Center, LMU Munich, 81377 Munich, Germany
| | - Julia Borgolte
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Kerstin Troidl
- Department of Vascular and Endovascular Surgery, Goethe-University-Hospital, 60590 Frankfurt am Main, Germany; Division of Arteriogenesis Research, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Judith-Irina Pagel
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Hospital of the University of Munich, Department of Anesthesiology, LMU Munich, 81377 Munich, Germany
| | - Amelia Caballero-Martinez
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Eike Christian Kleinert
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Barbara Walzog
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Biomedical Center, LMU Munich, 81377 Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, 81377 Munich, Germany; Biomedical Center, LMU Munich, 81377 Munich, Germany.
| |
Collapse
|
24
|
Ziegelhoeffer T, Heil M, Fischer S, Fernández B, Schaper W, Preissner KT, Deindl E, Pagel JI. Role of early growth response 1 in arteriogenesis: Impact on vascular cell proliferation and leukocyte recruitment in vivo. Thromb Haemost 2017; 107:562-74. [DOI: 10.1160/th11-07-0490] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Accepted: 12/13/2011] [Indexed: 02/07/2023]
Abstract
SummaryBased on previous findings that early growth response 1 (Egr-1) participates in leukocyte recruitment and cell proliferation in vitro, this study was designed to investigate its mode of action during arteriogenesis in vivo. In a model of peripheral arteriogenesis, Egr-1 was significantly upregulated in growing collaterals of wild-type (WT) mice, both on mRNA and protein level. Egr-1−/− mice demonstrated delayed arteriogenesis after femoral artery ligation. They further showed increased levels of monocytes and granulocytes in the circulation, but reduced levels in adductor muscles under baseline conditions. After femoral artery ligation, elevated numbers of macrophages were detected in the perivascular zone of collaterals in Egr-1−/− mice and mRNA of leukocyte recruitment mediators was upregulated. Other Egr family members (Egr-2 to -4) were significantly upregulated only in Egr-1−/− mice, suggesting a mechanism of counterbalancing Egr-1 deficiency. Moreover, splicing factor-1, downregulated in WT mice after femoral artery ligation in the process of increased vascular cell proliferation, was upregulated in Egr-1−/− mice. αSM-actin on the other hand, significantly downregulated in WT mice, showed no differential expression in Egr-1−/− mice. While cell cycle regulator cyclin E and cdc20 were upregulated in Egr-1−/− mice, cyclin D1 expression decreased below the detection limit in collaterals, and the proliferation marker ki67 was not differentially expressed. In conclusion, compensation for deficiency in Egr-1 function in leukocyte recruitment can presumably be mediated by other transcription factors; however, Egr-1 is indispensable for effective vascular cell cycle progression in arteriogenesis.
Collapse
|
25
|
Kirsch J, Schneider H, Pagel JI, Rehberg M, Singer M, Hellfritsch J, Chillo O, Schubert KM, Qiu J, Pogoda K, Kameritsch P, Uhl B, Pircher J, Deindl E, Müller S, Kirchner T, Pohl U, Conrad M, Beck H. Endothelial Dysfunction, and A Prothrombotic, Proinflammatory Phenotype Is Caused by Loss of Mitochondrial Thioredoxin Reductase in Endothelium. Arterioscler Thromb Vasc Biol 2016; 36:1891-9. [DOI: 10.1161/atvbaha.116.307843] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 06/24/2016] [Indexed: 02/07/2023]
Abstract
Objective—
Although the investigation on the importance of mitochondria-derived reactive oxygen species (ROS) in endothelial function has been gaining momentum, little is known on the precise role of the individual components involved in the maintenance of a delicate ROS balance. Here we studied the impact of an ongoing dysregulated redox homeostasis by examining the effects of endothelial cell–specific deletion of murine thioredoxin reductase 2 (Txnrd2), a key enzyme of mitochondrial redox control.
Approach and Results—
We analyzed the impact of an inducible, endothelial cell–specific deletion of Txnrd2 on vascular remodeling in the adult mouse after femoral artery ligation. Laser Doppler analysis and histology revealed impaired angiogenesis and arteriogenesis. In addition, endothelial loss of Txnrd2 resulted in a prothrombotic, proinflammatory vascular phenotype, manifested as intravascular cellular deposits, as well as microthrombi. This phenotype was confirmed by an increased leukocyte response toward interleukin-1 in the mouse cremaster model. In vitro, we could confirm the attenuated angiogenesis measured in vivo, which was accompanied by increased ROS and an impaired mitochondrial membrane potential. Ex vivo analysis of femoral arteries revealed reduced flow-dependent vasodilation in endothelial cell Txnrd2-deficient mice. This endothelial dysfunction could be, at least partly, ascribed to inadequate nitric oxide signaling.
Conclusions—
We conclude that the maintenance of mitochondrial ROS via Txnrd2 in endothelial cells is necessary for an intact vascular homeostasis and remodeling and that Txnrd2 plays a vitally important role in balancing mitochondrial ROS production in the endothelium.
Collapse
Affiliation(s)
- Julian Kirsch
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Holger Schneider
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Judith-Irina Pagel
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Markus Rehberg
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Miriam Singer
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Juliane Hellfritsch
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Omary Chillo
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Kai Michael Schubert
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Jiehua Qiu
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Kristin Pogoda
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Petra Kameritsch
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Bernd Uhl
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Joachim Pircher
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Elisabeth Deindl
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Susanna Müller
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Thomas Kirchner
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Ulrich Pohl
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Marcus Conrad
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| | - Heike Beck
- From the Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany (J.K., H.S., J.-I.P., M.R., M.S., J.H., O.C., K.M.S., J.Q., K.P., P.K., B.U., J.P., E.D., U.P., H.B.); Stress and Immunity Lab, Department of Anesthesiology, Ludwig-Maximilians-University Hospital of Munich, Munich, Germany (J.-I.P.); Munich Cluster for Systems Neurology (SyNergy), Munich, Germany (U.P.); Partner site Munich Heart Alliance, Munich, Germany (U.P.); Institute of Pathology, Ludwig
| |
Collapse
|
26
|
Chillo O, Kleinert EC, Lautz T, Lasch M, Pagel JI, Heun Y, Troidl K, Fischer S, Caballero-Martinez A, Mauer A, Kurz ARM, Assmann G, Rehberg M, Kanse SM, Nieswandt B, Walzog B, Reichel CA, Mannell H, Preissner KT, Deindl E. Perivascular Mast Cells Govern Shear Stress-Induced Arteriogenesis by Orchestrating Leukocyte Function. Cell Rep 2016; 16:2197-2207. [PMID: 27524614 DOI: 10.1016/j.celrep.2016.07.040] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 06/23/2016] [Accepted: 07/17/2016] [Indexed: 01/08/2023] Open
Abstract
The body has the capacity to compensate for an occluded artery by creating a natural bypass upon increased fluid shear stress. How this mechanical force is translated into collateral artery growth (arteriogenesis) is unresolved. We show that extravasation of neutrophils mediated by the platelet receptor GPIbα and uPA results in Nox2-derived reactive oxygen radicals, which activate perivascular mast cells. These c-kit(+)/CXCR-4(+) cells stimulate arteriogenesis by recruiting additional neutrophils as well as growth-promoting monocytes and T cells. Additionally, mast cells may directly contribute to vascular remodeling and vascular cell proliferation through increased MMP activity and by supplying growth-promoting factors. Boosting mast cell recruitment and activation effectively promotes arteriogenesis, thereby protecting tissue from severe ischemic damage. We thus find that perivascular mast cells are central regulators of shear stress-induced arteriogenesis by orchestrating leukocyte function and growth factor/cytokine release, thus providing a therapeutic target for treatment of vascular occlusive diseases.
Collapse
Affiliation(s)
- Omary Chillo
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Eike Christian Kleinert
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Thomas Lautz
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Judith-Irina Pagel
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany; Hospital of the University of Munich, Department of Anesthesiology, LMU Munich, 81377 Munich, Germany
| | - Yvonn Heun
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Kerstin Troidl
- Division of Arteriogenesis Research, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Silvia Fischer
- Institute for Biochemistry, Medical School, Justus-Liebig-Universität, 35392 Giessen, Germany
| | - Amelia Caballero-Martinez
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Annika Mauer
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany; Institute for Biochemistry, Medical School, Justus-Liebig-Universität, 35392 Giessen, Germany
| | - Angela R M Kurz
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Gerald Assmann
- Institute of Pathology, LMU Munich, 81377 Munich, Germany
| | - Markus Rehberg
- Institute for Stroke and Dementia Research, LMU Munich, 81377 Munich, Germany
| | - Sandip M Kanse
- Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
| | - Bernhard Nieswandt
- Institute of Experimental Biomedicine, University Hospital and Rudolf Virchow Center, University of Würzburg, 97080 Würzburg, Germany
| | - Barbara Walzog
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Christoph A Reichel
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany; Hospital of the University of Munich, Department of Otorhinolaryngology, Head and Neck Surgery, LMU Munich, 81377 Munich, Germany
| | - Hanna Mannell
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany
| | - Klaus T Preissner
- Institute for Biochemistry, Medical School, Justus-Liebig-Universität, 35392 Giessen, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-Universität (LMU) Munich, 81377 Munich, Germany.
| |
Collapse
|
27
|
Kleinert E, Langenmayer MC, Reichart B, Kindermann J, Griemert B, Blutke A, Troidl K, Mayr T, Grantzow T, Noyan F, Abicht JM, Fischer S, Preissner KT, Wanke R, Deindl E, Guethoff S. Ribonuclease (RNase) Prolongs Survival of Grafts in Experimental Heart Transplantation. J Am Heart Assoc 2016; 5:e003429. [PMID: 27121849 PMCID: PMC4889206 DOI: 10.1161/jaha.116.003429] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 03/03/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND Cell damage, tissue and vascular injury are associated with the exposure and release of intracellular components such as RNA, which promote inflammatory reactions and thrombosis. Based on the counteracting anti-inflammatory and cardioprotective functions of ribonuclease A (RNase A) in this context, its role in an experimental model of heart transplantation in rats was studied. METHODS AND RESULTS Inbred BN/OrlRj rat cardiac allografts were heterotopically transplanted into inbred LEW/OrlRj rats. Recipients were intravenously treated every other day with saline or bovine pancreatic RNase A (50 μg/kg). Toxic side effects were not found (macroscopically and histologically). Heart tissue flow cytometry and quantitative morphological analyses of explanted hearts at postoperative day 1 or postoperative day 4 showed reduced leukocyte infiltration, edema, and thrombus formation in RNase A-treated rats. In allogeneic mixed lymphocyte reactions, RNase A decreased the proliferation of effector T cells. RNase A treatment of rats resulted in prolonged median graft survival up to 10.5 days (interquartile range 1.8) compared to 6.5 days (interquartile range 1.0) in saline treatment (P=0.001). Treatment of rats with a new generated (recombinant) human pancreatic RNase 1 prolonged median graft survival similarly, unlike treatment with (recombinant) inactive human RNase 1 (each 50 μg/kg IV every other day, 11.0 days, interquartile range 0.3, versus 8.0 days, interquartile range 0.5, P=0.007). CONCLUSIONS Upon heart transplantation, RNase administration appears to present a promising and safe drug to counteract ischemia/reperfusion injury and graft rejection. Furthermore, RNase treatment may be considered in situations of critical reperfusion after percutaneous coronary interventions or in cardiac surgery using the heart-lung machine.
Collapse
Affiliation(s)
- Eike Kleinert
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Martin C Langenmayer
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Germany Institute for Infectious Diseases and Zoonoses, Ludwig-Maximilians-Universität München, Germany
| | - Bruno Reichart
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Jana Kindermann
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany Department of Cardiac Surgery, Ludwig-Maximilians-Universität München, Germany
| | - Barbara Griemert
- Institute of Biochemistry, Medical School, Justus-Liebig-Universität, Giessen, Germany
| | - Andreas Blutke
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Kerstin Troidl
- Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany Department of Vascular and Endovascular Surgery, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Tanja Mayr
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany Department of Anaesthesiology, Ludwig-Maximilians-Universität München, Germany
| | - Tobias Grantzow
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Fatih Noyan
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Jan-Michael Abicht
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany Department of Anaesthesiology, Ludwig-Maximilians-Universität München, Germany
| | - Silvia Fischer
- Institute of Biochemistry, Medical School, Justus-Liebig-Universität, Giessen, Germany
| | - Klaus T Preissner
- Institute of Biochemistry, Medical School, Justus-Liebig-Universität, Giessen, Germany
| | - Ruediger Wanke
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Elisabeth Deindl
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany
| | - Sonja Guethoff
- Walter Brendel Centre of Experimental Medicine, Ludwig-Maximilians-Universität München, Germany Department of Cardiac Surgery, Ludwig-Maximilians-Universität München, Germany
| |
Collapse
|
28
|
Trenkwalder T, Deindl E, Bongiovanni D, Lee S, Schunkert H, Kupatt C, Hinkel R. Thymosin-β4-mediated therapeutic neovascularization: role of the PI3K/AKT pathway. Expert Opin Biol Ther 2015; 15 Suppl 1:S175-85. [PMID: 25652683 DOI: 10.1517/14712598.2015.1011122] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Thymosin β4 (Tβ4) is known to have pro-angogenic abilities in vitro and in vivo, and its cardioprotective effect is PI3/AKT-dependent. Tβ4-induced vessel formation requires transcriptional activation via the MRTF/SRF pathway. However, the relevance of PI3/AKT signaling for Tβ4-induced angiogenesis remains unclear. Here, we analyzed the PI3K/AKT cascade after Tβ4 transduction in models of chronic hindlimb ischemia. METHODS Tube formation assays of endothelial cells transfected with Tβ4 ± AKT-dn or PI3Kα/Rho inhibition were performed. In mice, rAAV.Tβ4 was injected (intramuscular [i.m.]) 14 days before femoral artery ligation. In addition, either rAAV.AKT-dn was co-applied or Rho/PI3K/AKT pathways were inhibited. Capillary density and hindlimb perfusion were obtained. In rabbits, chronic ischemia was induced by femoral artery excision and subsequent i.m. injection of rAAV.Tβ4 ± rAAV.AKT-dn. Analyses of capillary density, collateral formation and perfusion were performed. RESULTS Tβ4-induced ring formation was blunted by inhibiting the Rho-kinase (ROCK) or the PI3K/AKT pathway. In vivo, Tβ4 transduction induced angiogenesis and perfusion, an effect abrogated by inhibition of Rho-signaling, or PI3Kα/AKT. In the rabbit model, inhibition of AKT in the lower limb not only abolished angiogenesis but also collateral formation. CONCLUSION Tβ4 requires PI3Kα/AKT pathway signaling for induction of therapeutic neovascularization in ischemic limb disease.
Collapse
Affiliation(s)
- Teresa Trenkwalder
- Deutsches Herzzentrum München, Technische Universität , Munich , Germany
| | | | | | | | | | | | | |
Collapse
|
29
|
Chandraratne S, von Bruehl ML, Pagel JI, Stark K, Kleinert E, Konrad I, Farschtschi S, Coletti R, Gärtner F, Chillo O, Legate KR, Lorenz M, Rutkowski S, Caballero-Martinez A, Starke R, Tirniceriu A, Pauleikhoff L, Fischer S, Assmann G, Mueller-Hoecker J, Ware J, Nieswandt B, Schaper W, Schulz C, Deindl E, Massberg S. Critical role of platelet glycoprotein ibα in arterial remodeling. Arterioscler Thromb Vasc Biol 2014; 35:589-97. [PMID: 25550202 DOI: 10.1161/atvbaha.114.304447] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Arteriogenesis is strongly dependent on the recruitment of leukocytes, especially monocytes, into the perivascular space of growing collateral vessels. On the basis of previous findings that platelets are central players in inflammatory processes and mediate the recruitment of leukocytes, the aim of this study was to assess the role of platelets in a model of arterial remodeling. APPROACH AND RESULTS C57Bl6 wild-type mice, IL4-R/Iba mice lacking the extracellular domain of the glycoprotein Ibα (GPIbα) receptor, and mice treated with antibodies to block GPIbα or deplete circulating platelets were studied in peripheral arteriogenesis. Using a novel model of intravital 2-photon and epifluorescence imaging, we visualized and quantified the interaction of platelets with leukocytes and the vascular endothelium in vivo. We found that transient platelet adhesion to the endothelium of collateral vessels was a major event during arteriogenesis and depended on GPIbα. Furthermore, leukocyte recruitment was obviously affected in animals with defective platelet GPIbα function. In IL4-R/Iba mice, transient and firm leukocyte adhesion to the endothelium of collateral vessels, as well as leukocyte accumulation in the perivascular space, were significantly reduced. Furthermore, we detected platelet-leukocyte aggregates within the circulation, which were significantly reduced in IL4-R/Iba animals. Finally, platelet depletion and loss of GPIbα function resulted in poor reperfusion recovery as determined by laser Doppler imaging. CONCLUSIONS Thus, GPIbα-mediated interactions between platelets and endothelial cells, as well as leukocytes, support innate immune cell recruitment and promote arteriogenesis-establishing platelets as critical players in this process.
Collapse
Affiliation(s)
- Sue Chandraratne
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Marie-Luise von Bruehl
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Judith-Irina Pagel
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Konstantin Stark
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Eike Kleinert
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Ildiko Konrad
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Said Farschtschi
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Raffaele Coletti
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Florian Gärtner
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Omari Chillo
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Kyle R Legate
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Michael Lorenz
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Simon Rutkowski
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Amelia Caballero-Martinez
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Richard Starke
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Anca Tirniceriu
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Laurenz Pauleikhoff
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Silvia Fischer
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Gerald Assmann
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Josef Mueller-Hoecker
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Jerry Ware
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Bernhard Nieswandt
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Wolfgang Schaper
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Christian Schulz
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Elisabeth Deindl
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.)
| | - Steffen Massberg
- From the Medizinische Klinik und Poliklinik I, Department of Cardiology (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M.), Walter-Brendel-Centre of Experimental Medicine (S.C., M.-L.v.B., J.-I.P., K.S., E.K., I.K., S.F., R.C., F.G., O.C., K.R.L., M.L., S.R., A.C.-M., A.T., L.P., C.S., E.D., S.M.), Department of Anaesthesiology (J.-I.P.), Department of Applied Physics (K.R.L.), and Institute of Pathology (G.A., J.M.-H.), Ludwig-Maximilians-Universität, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Berlin, Germany (S.C., M.-L.v.B., K.S., I.K., S.F., R.C., F.G., K.R.L., M.L., A.T., C.S., S.M); Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany (S.F.); Vascular Sciences, National Heart and Lung Institute, Faculty of Medicine, Hammersmith Campus, Imperial College London, South Kensington Campus, London, United Kingdom (R.S.); Department of Physiology and Biophysics, University of Arkansas for Medical Science, Little Rock (J.W.); Rudolf Virchow Center and DFG Research Center for Experimental Biomedicine, Universität Würzburg, Würzburg, Germany (B.N.); and Max Planck Institute for Heart and Lung Research, Giessen, Germany (W.S.).
| |
Collapse
|
30
|
Abstract
It is well known that the protective capacity of the collateral circulation falls short in many individuals with ischemic disease of the heart, brain, and lower extremities. In the past 15 years, opportunities created by molecular and genetic tools, together with disappointing outcomes in many angiogenic trials, have led to a significant increase in the number of studies that focus on: understanding the basic biology of the collateral circulation; identifying the mechanisms that limit the collateral circulation's capacity in many individuals; devising methods to measure collateral extent, which has been found to vary widely among individuals; and developing treatments to increase collateral blood flow in obstructive disease. Unfortunately, accompanying this increase in reports has been a proliferation of vague terms used to describe the disposition and behavior of this unique circulation, as well as the increasing misuse of well-ensconced ones by new (and old) students of collateral circulation. With this in mind, we provide a brief glossary of readily understandable terms to denote the formation, adaptive growth, and maladaptive rarefaction of collateral circulation. We also propose terminology for several newly discovered processes that occur in the collateral circulation. Finally, we include terms used to describe vessels that are sometimes confused with collaterals, as well as terms describing processes active in the general arterial-venous circulation when ischemic conditions engage the collateral circulation. We hope this brief review will help unify the terminology used in collateral research.
Collapse
Affiliation(s)
- James E Faber
- From the Departments of Cell Biology and Physiology, University of North Carolina, Chapel Hill (J.E.F.); Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown (W.M.C.), Walter-Brendel-Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany (E.D.); Division of Cardiology, VU University Medical Center, Amsterdam, The Netherlands (N.V.R.); and Departments of Internal Medicine and Cell Biology, Yale Cardiovascular Research Center, New Haven, CT (M.S.).
| | - William M Chilian
- From the Departments of Cell Biology and Physiology, University of North Carolina, Chapel Hill (J.E.F.); Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown (W.M.C.), Walter-Brendel-Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany (E.D.); Division of Cardiology, VU University Medical Center, Amsterdam, The Netherlands (N.V.R.); and Departments of Internal Medicine and Cell Biology, Yale Cardiovascular Research Center, New Haven, CT (M.S.)
| | - Elisabeth Deindl
- From the Departments of Cell Biology and Physiology, University of North Carolina, Chapel Hill (J.E.F.); Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown (W.M.C.), Walter-Brendel-Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany (E.D.); Division of Cardiology, VU University Medical Center, Amsterdam, The Netherlands (N.V.R.); and Departments of Internal Medicine and Cell Biology, Yale Cardiovascular Research Center, New Haven, CT (M.S.)
| | - Niels van Royen
- From the Departments of Cell Biology and Physiology, University of North Carolina, Chapel Hill (J.E.F.); Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown (W.M.C.), Walter-Brendel-Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany (E.D.); Division of Cardiology, VU University Medical Center, Amsterdam, The Netherlands (N.V.R.); and Departments of Internal Medicine and Cell Biology, Yale Cardiovascular Research Center, New Haven, CT (M.S.)
| | - Michael Simons
- From the Departments of Cell Biology and Physiology, University of North Carolina, Chapel Hill (J.E.F.); Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown (W.M.C.), Walter-Brendel-Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany (E.D.); Division of Cardiology, VU University Medical Center, Amsterdam, The Netherlands (N.V.R.); and Departments of Internal Medicine and Cell Biology, Yale Cardiovascular Research Center, New Haven, CT (M.S.)
| |
Collapse
|
31
|
Deindl E. Mechanistic insights into the functional role of vascular endothelial growth factor and its signalling partner brain-derived neurotrophic factor in angiogenic tube formation. Acta Physiol (Oxf) 2014; 211:268-70. [PMID: 24720532 DOI: 10.1111/apha.12299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- E. Deindl
- Walter-Brendel-Centre of Experimental Medicine; Ludwig-Maximilians-Universität; Munich Germany
| |
Collapse
|
32
|
Kleinert E, Reichart B, Mayr T, Abicht JM, Brenner P, Hagl C, Langenmayer M, Wanke R, Deindl E, Guethoff S. RNase A in (Xeno)Transplantation. Xenotransplantation 2014. [DOI: 10.1111/xen.12083_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eike Kleinert
- Walter-Brendel-Centre of Experimental Medicine; Ludwig-Maximilians University; Munich Germany
| | - Bruno Reichart
- Transregio Collaborative Research Center 127; Ludwig-Maximilians University; Munich Germany
| | - Tanja Mayr
- Transregio Collaborative Research Center 127; Ludwig-Maximilians University; Munich Germany
- Department of Cardiac Surgery; Ludwig-Maximilians University; Munich Germany
| | - Jan-Michael Abicht
- Transregio Collaborative Research Center 127; Ludwig-Maximilians University; Munich Germany
- Department of Anaesthesiology; Ludwig-Maximilians University; Munich Germany
| | - Paolo Brenner
- Transregio Collaborative Research Center 127; Ludwig-Maximilians University; Munich Germany
- Department of Cardiac Surgery; Ludwig-Maximilians University; Munich Germany
| | - Christian Hagl
- Department of Cardiac Surgery; Ludwig-Maximilians University; Munich Germany
| | - Martin Langenmayer
- Institute of Veterinary Pathology; Ludwig-Maximilians University; Munich Germany
| | - Ruediger Wanke
- Institute of Veterinary Pathology; Ludwig-Maximilians University; Munich Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine; Ludwig-Maximilians University; Munich Germany
| | - Sonja Guethoff
- Transregio Collaborative Research Center 127; Ludwig-Maximilians University; Munich Germany
- Department of Cardiac Surgery; Ludwig-Maximilians University; Munich Germany
| |
Collapse
|
33
|
Kleinert E, Reichart B, Mayr T, Abicht JM, Brenner P, Hagl C, Langenmayer M, Wanke R, Deindl E, Guethoff S. RNase: A possible adjuvant in transplantation? Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
34
|
Qin D, Trenkwalder T, Lee S, Chillo O, Deindl E, Kupatt C, Hinkel R. Early vessel destabilization mediated by Angiopoietin-2 and subsequent vessel maturation via Angiopoietin-1 induce functional neovasculature after ischemia. PLoS One 2013; 8:e61831. [PMID: 23613948 PMCID: PMC3628915 DOI: 10.1371/journal.pone.0061831] [Citation(s) in RCA: 34] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 03/14/2013] [Indexed: 11/25/2022] Open
Abstract
Background We assessed whether Angiopoietin-2 (Ang2), a Tie2 ligand and partial antagonist of Angiopoietin-1 (Ang1), is required for early vessel destabilization during postischemic angiogenesis, when combined with vascular growth factors. Methods In vitro, matrigel co-cultures assessed endothelial-cell tube formation and pericyte recruitment after stimulation of VEGF-A, Apelin (APLN), Ang1 with or without Ang2. In a murine hindlimb ischemia model, adeno-associated virus (rAAV, 3×1012 virusparticles) transduction of VEGF-A, APLN and Ang1 with or without Ang2 (continuous or early expression d0-3) was performed intramuscularly (d-14). Femoral artery ligation was performed at d0, followed by laser doppler perfusion meassurements (LDI) 7 and 14. At d7 (early timepoint) and d14 (late timepoint), histological analysis of capillary/muscle fiber ratio (CMF-R, PECAM-1) and pericyte/capillary ratio (PC-R, NG2) was performed. Results In vitro, VEGF-A, APLN and Ang1 induced ring formation, but only APLN and Ang1 recruited pericytes. Ang2 did not affect tube formation by APLN, but reduced pericyte recruitment after APLN or Ang1 overexpression. In vivo, rAAV.VEGF-A did not alter LDI-perfusion at d14, consistent with an impaired PC-R despite a rise in CMF-R. rAAV.APLN improved perfusion at d14, with or without continuous Ang2, increasing CMF-R and PC-R. rAAV.Ang1 improved perfusion at d14, when combined with rAAV.Ang2 (d0-3), accompanied by an increased CMF-R and PC-R. Conclusion The combination of early vessel destabilization (Ang2 d0-3) and continuous Ang1 overexpression improves hindlimb perfusion, pointing to the importance of early vessel destabilization and subsequent vessel maturation for enhanced therapeutic neovascularization.
Collapse
Affiliation(s)
- Di Qin
- Medizinische Klinik und Poliklinik I, Klinikum Großhadern, Munich, Germany
- Department of Senile Disease, China-Japan Union Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Teresa Trenkwalder
- Medizinische Klinik und Poliklinik I, Klinikum Großhadern, Munich, Germany
- Walter-Brendel-Centre of Experimental Medicine, LMU Munich, Munich, Germany
| | - Seungmin Lee
- Medizinische Klinik und Poliklinik I, Klinikum Großhadern, Munich, Germany
| | - Omary Chillo
- Walter-Brendel-Centre of Experimental Medicine, LMU Munich, Munich, Germany
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, LMU Munich, Munich, Germany
| | - Christian Kupatt
- Medizinische Klinik und Poliklinik I, Klinikum Großhadern, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Rabea Hinkel
- Medizinische Klinik und Poliklinik I, Klinikum Großhadern, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
- * E-mail:
| |
Collapse
|
35
|
|
36
|
Schaper W, Deindl E. Editorial (Hot Topic: Vascular Remodeling). Curr Vasc Pharmacol 2012. [DOI: 10.2174/1570161111309010002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
37
|
Fischer S, Grantzow T, Pagel JI, Tschernatsch M, Sperandio M, Preissner KT, Deindl E. Extracellular RNA promotes leukocyte recruitment in the vascular system by mobilising proinflammatory cytokines. Thromb Haemost 2012; 108:730-41. [PMID: 22836360 DOI: 10.1160/th12-03-0186] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Accepted: 07/16/2012] [Indexed: 12/31/2022]
Abstract
Extracellular RNA (eRNA), released from cells under conditions of injury or vascular disease, acts as potent prothrombotic factor and promotes vascular hyperpermeability related to oedema formation in vivo. In this study, we aimed to investigate the mechanism by which eRNA triggers inflammatory processes, particularly associated with different steps of leukocyte recruitment. Using intravital microscopy of murine cremaster muscle venules, eRNA (but not DNA) significantly induced leukocyte adhesion and transmigration in vivo, which was comparable in its effects to the function of tumour-necrosis-factor-α (TNF-α). In vitro, eRNA promoted adhesion and transmigration of monocytic cells on and across endothelial cell monolayers. eRNA-induced monocyte adhesion in vitro was mediated by activation of the vascular endothelial growth factor (VEGF)/VEGF-receptor-2 system and was abolished by neutralising antibodies against intercellular adhesion molecule-1 or the β2-integrin Mac-1. Additionally, eRNA induced the release of TNF-α from monocytic cells in a time- and concentration-dependent manner, which involved activation of TNF-α-converting enzyme (TACE) as well as the nuclear factor κB signalling machinery. In vivo, inhibiton of TACE significantly reduced eRNA-induced leukocyte adhesion. Our findings present evidence that eRNA in connection with tissue/vascular damage provokes a potent inflammatory response by inducing leukocyte recruitment and by mobilising proinflammatory cytokines from monocytes.
Collapse
Affiliation(s)
- Silvia Fischer
- Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany.
| | | | | | | | | | | | | |
Collapse
|
38
|
Weckbach LT, Groesser L, Borgolte J, Pagel JI, Pogoda F, Schymeinsky J, Müller-Höcker J, Shakibaei M, Muramatsu T, Deindl E, Walzog B. Midkine acts as proangiogenic cytokine in hypoxia-induced angiogenesis. Am J Physiol Heart Circ Physiol 2012; 303:H429-38. [PMID: 22707563 DOI: 10.1152/ajpheart.00934.2011] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The cytokine midkine (MK) promotes tumor growth mainly by inducing angiogenesis. Here, we identified the source of MK in the vascular system under hypoxic conditions and demonstrated the relevance of MK during ischemia of normal tissue. Hypoxia increased MK protein expression in human polymorphonuclear neutrophils (PMN), monocytes, and human umbilical vein endothelial cells (HUVEC) compared with normoxia. Immunoelectron microscopy showed elevated cell surface expression of MK in PMN and monocytes during hypoxia. However, only HUVEC released significant amounts of soluble MK during hypoxia compared with normoxia (301 ± 81 pg/ml vs. 158 ± 45 pg/ml; P < 0.05). Exogenous MK induced neovascularization in a chorioallantoic membrane (CAM) assay compared with negative control as measured by counting the number of branching points per visual field (1,074 ± 54 vs. 211 ± 70; P < 0.05). In a hind limb ischemia model, the angiogenic response was almost completely absent in MK-deficient mice, whereas control animals showed a profound angiogenic response measured as proliferating endothelial cells per visual field (45 ± 30 vs. 169 ± 34; P < 0.01). These unanticipated results identified endothelial cells as the source of soluble MK in the vascular system during hypoxia and defined MK as a pivotal player of angiogenesis during ischemia in nonmalignant tissue.
Collapse
Affiliation(s)
- Ludwig T Weckbach
- Walter Brendel Centre of Experimental Medicine, Ludwig Maximilians University, Munich, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Pagel JI, Deindl E. Early growth response 1--a transcription factor in the crossfire of signal transduction cascades. Indian J Biochem Biophys 2011; 48:226-235. [PMID: 22053691] [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: 05/31/2023]
Abstract
Early growth response-1 (Egr-1) is a Cys2-His2-type zinc-finger transcription factor. A broad range of extracellular stimuli is capable of activating Egr-1, thus mediating growth, proliferation, differentiation or apoptosis. Egr-1 is, therefore, participating in the progression of a variety of diseases such as atherosclerosis or cancer. Functional response elements connect Egr-1 to signal transduction cascades targeting Egr-1. Five serum response elements (SRE) have been identified in the promoter region of Egr-1, the binding region of serum response factor (SRF). The Rho/Rho-kinase pathway has been shown to regulate actin reorganization via LIM-kinase mediated cofilin phosphorylation. Recent studies have revealed that the actin binding striated muscle activator of Rho signaling (STARS) promotes translocation of myosin related transcription factors (MRTFs) into the nucleus, leading to SRF activation. The ternary complex factor (TCF) Elk-1 eventually bridges the gap between SRF-mediated gene transcription and the Raf/MEK/ERK pathway. Moreover, the Egr-1 promoter owns two cAMP response elements (CREs), whose relevance for gene expression is still unclear. An Egr-1 binding site (EBS) located on the Egr-1 promoter itself is arguing for a negative feedback mechanism. The acquired knowledge on transcriptional regulation of Egr-1 is not entirely understood. In this review, we highlight upstream and downstream signaling in vitro and in vivo associated with Egr-1.
Collapse
Affiliation(s)
- Judith-Irina Pagel
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany.
| | | |
Collapse
|
40
|
Pagel JI, Borgolte J, Hoefer I, Fernández B, Schaper W, Deindl E. Involvement of neuronal NO synthase in collateral artery growth. Indian J Biochem Biophys 2011; 48:270-274. [PMID: 22053696] [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: 05/31/2023]
Abstract
To evaluate the role of neuronal nitric oxides synthase (nNOS) in collateral artery growth (arteriogenesis), we analyzed the expression pattern of nNOS at distinct time points on RNA and protein levels in a rabbit and a murine model of peripheral arteriogenesis. In the rabbit model, Northern blot analyses revealed a significant upregulation of nNOS at 6 h (1.6-fold), 12 h (2.2-fold) and 24 h (2.0-fold) after induction of arteriogenesis via femoral artery ligation, when compared to the sham operated side. In mice, an upregulation of nNOS was also detected using Northern blot (at 6 h, 12 h) and qRT-PCR (12 h: 2.4-fold). On the protein level, nNOS was found to be upregulated 24 h after femoral artery ligation. Immunohistochemical staining showed that nNOS was localized in endothelial and smooth muscle cells of collateral arteries, as well as in skeletal muscle and nerves. In summary, our data provide evidence that nNOS is not constitutively expressed, but is induced during arteriogenesis, playing a role in supplying reactive oxygen species such as H2O2 and low levels of NO.
Collapse
Affiliation(s)
- J-I Pagel
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-University Munich, Germany
| | | | | | | | | | | |
Collapse
|
41
|
Dussmann P, Pagel JI, Vogel S, Magnusson T, Zimmermann R, Wagner E, Schaper W, Ogris M, Deindl E. Live in vivo imaging of Egr-1 promoter activity during neonatal development, liver regeneration and wound healing. BMC Dev Biol 2011; 11:28. [PMID: 21595990 PMCID: PMC3120781 DOI: 10.1186/1471-213x-11-28] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Accepted: 05/20/2011] [Indexed: 12/23/2022]
Abstract
BACKGROUND The zinc finger transcription factor Egr-1 (Early growth response 1) is central to several growth factors and represents an important activator of target genes not only involved in physiological processes like embryogenesis and neonatal development, but also in a variety of pathophysiological processes, for example atherosclerosis or cancer. Current options to investigate its transcription and activation in vivo are end-point measurements that do not provide insights into dynamic changes in the living organism. RESULTS We developed a transgenic mouse (Egr-1-luc) in which the luciferase reporter gene is under the control of the murine Egr-1 promoter providing a versatile tool to study the time course of Egr-1 activation in vivo. In neonatal mice, bioluminescence imaging revealed a high Egr-1 promoter activity reaching basal levels three weeks after birth with activity at snout, ears and paws. Using a model of partial hepatectomy we could show that Egr-1 promoter activity and Egr-1 mRNA levels were increased in the regenerating liver. In a model of wound healing, we demonstrated that Egr-1 promoter activity was upregulated at the site of injury. CONCLUSION Taken together, we have developed a transgenic mouse model that allows real time in vivo imaging of the Egr-1 promoter activity. The ability to monitor and quantify Egr-1 activity in the living organism may facilitate a better understanding of Egr-1 function in vivo.
Collapse
Affiliation(s)
- Philipp Dussmann
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Deindl E, Pagel JI, Bruehl ML, Schaper W, Massberg S. Functional role of the platelet glycopeptide receptor type GPIbα in arteriogenesis. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1092.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Wolfgang Schaper
- Max‐Planck‐Institute for Heart and Lung ResearchBad NauheimGermany
| | | |
Collapse
|
43
|
Fischer S, Nishio M, Dadkhahi S, Gansler J, Saffarzadeh M, Shibamiyama A, Kral N, Baal N, Koyama T, Deindl E, Preissner KT. Expression and localisation of vascular ribonucleases in endothelial cells. Thromb Haemost 2010; 105:345-55. [PMID: 21103661 DOI: 10.1160/th10-06-0345] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 11/05/2010] [Indexed: 11/05/2022]
Abstract
The functions of extracellular RNA in the vascular system as new procoagulatory and permeability-increasing factor in vivo and in vitro were shown to be counteracted by pancreatic type RNase1. Based on the identification of RNase1 in plasma and serum, it is proposed that the enzyme is expressed by vascular cells to contribute in the regulation of extracellular RNA. It is demonstrated that RNase1 and RNase5 (also termed angiogenin) were differentially expressed in various types of endothelial cells, whereby human umbilical vein endothelial cells (HUVEC) expressed and released the highest concentration of active RNase1. Expression and release of RNase5 were similar in all types of endothelial cells tested. Both RNases were constitutively produced and secreted, whereby a portion of RNase1, but not RNase5, was stored in Weibel-Palade bodies, co-localising with von Willlebrand factor and P-selectin. Accordingly, immediate release of RNase1 from these granules was demonstrated in vitro and in vivo using Weibel-Palade body exocytosis-inducing agents. Additionally, extracellular RNA or poly:IC (but not DNA) induced this short-term release of RNase1. Our results indicate that vascular RNase1 and RNase5 are mainly produced by vascular endothelial cells and can serve, depending on the vascular bed, different functions in vascular homeostasis and endothelial cell responses.
Collapse
Affiliation(s)
- Silvia Fischer
- Department of Biochemistry, Justus-Liebig-University, Giessen, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Dimomeletis I, Deindl E, Zaruba M, Groebner M, Zahler S, Laslo SM, David R, Kostin S, Deutsch MA, Assmann G, Mueller-Hoecker J, Feuring-Buske M, Franz WM. Assessment of human MAPCs for stem cell transplantation and cardiac regeneration after myocardial infarction in SCID mice. Exp Hematol 2010; 38:1105-14. [PMID: 20621157 DOI: 10.1016/j.exphem.2010.06.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 06/30/2010] [Accepted: 06/30/2010] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Clinical studies suggest that transplantation of total bone marrow (BM) after myocardial infarction (MI) is feasible and potentially effective. However, focusing on a defined BM-derived stem cell type may enable a more specific and optimized treatment. Multilineage differentiation potential makes BM-derived multipotent adult progenitor cells (MAPCs) a promising stem cell pool for regenerative purposes. We analyzed the cardioregenerative potential of human MAPCs in a murine model of myocardial infarction. MATERIALS AND METHODS Human MAPCs were selected by negative depletion of CD45(+)/glycophorin(+) BM cells and plated on fibronectin-coated dishes. In vitro, stem cells were analyzed by reverse transcription polymerase chain reaction. In vivo, we transplanted human MAPCs (5 × 10(5)) by intramyocardial injection after MI in severe combined immunodeficient (SCID) beige mice. Six and 30 days after the surgical procedure, pressure-volume relationships were investigated in vivo. Heart tissues were analyzed immunohistochemically. RESULTS Reverse transcription polymerase chain reaction experiments on early human MAPC passages evidenced an expression of Oct-4, a stem cell marker indicating pluripotency. In later passages, cardiac markers (Nkx2.5, GATA4, MLC-2v, MLC-2a, ANP, cTnT, cTnI,) and smooth muscle cell markers (SMA, SM22α) were expressed. Transplantation of human MAPCs into the ischemic border zone after MI resulted in an improved cardiac function at day 6 (ejection fraction, 26% vs 20%) and day 30 (ejection fraction, 30% vs 23%). Confirmation of human MAPC marker vimentin in immunohistochemistry demonstrated that human MAPC integrated in the peri-infarct region. The proliferation marker Ki67 was absent in immunohistochemistry and teratoma formation was not found, indicating no tumorous potential of transplanted human MAPCs in the tumor-sensitive SCID model. CONCLUSIONS Transplantation of human MAPCs after MI ameliorates myocardial function, which may be explained by trophic effects of human MAPCs. Lack of evidence of tumorous potential in the tumor-sensitive SCID model indicates that human MAPCs may deliver an effective and safe stem cell pool for potential treatment of ischemic heart disease.
Collapse
Affiliation(s)
- Ilias Dimomeletis
- Department of General and Vascular Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, Munich, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Heusch P, Aker S, Boengler K, Deindl E, van de Sand A, Klein K, Rassaf T, Konietzka I, Sewell A, Menazza S, Canton M, Heusch G, Di Lisa F, Schulz R. Increased inducible nitric oxide synthase and arginase II expression in heart failure: no net nitrite/nitrate production and protein S-nitrosylation. Am J Physiol Heart Circ Physiol 2010; 299:H446-53. [PMID: 20511413 DOI: 10.1152/ajpheart.01034.2009] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Our objective was to address the balance of inducible nitric oxide (NO) synthase (iNOS) and arginase and their contribution to contractile dysfunction in heart failure (HF). Excessive NO formation is thought to contribute to contractile dysfunction; in macrophages, increased iNOS expression is associated with increased arginase expression, which competes with iNOS for arginine. With substrate limitation, iNOS may become uncoupled and produce reactive oxygen species (ROS). In rabbits, HF was induced by left ventricular (LV) pacing (400 beats/min) for 3 wk. iNOS mRNA [quantitative real-time PCR (qRT-PCR)] and protein expression (confocal microscopy) were detected, and arginase II expression was quantified with Western blot; serum arginine and myocardial nitrite and nitrate concentrations were determined by chemiluminescence, and protein S-nitrosylation with Western blot. Superoxide anions were quantified with dihydroethidine staining. HF rabbits had increased LV end-diastolic diameter [20.0 + or - 0.5 (SE) vs. 17.2 + or - 0.3 mm in sham] and decreased systolic fractional shortening (11.1 + or - 1.4 vs. 30.6 + or - 0.7% in sham; both P < 0.05). Myocardial iNOS mRNA and protein expression were increased, however, not associated with increased myocardial nitrite or nitrate concentrations or protein S-nitrosylation. The serum arginine concentration was decreased (124.3 + or - 5.6 vs. 155.4 + or - 12.0 micromol/l in sham; P < 0.05) at a time when cardiac arginase II expression was increased (0.06 + or - 0.01 vs. 0.02 + or - 0.01 arbitrary units in sham; P < 0.05). Inhibition of iNOS with 1400W attenuated superoxide anion formation and contractile dysfunction in failing hearts. Concomitant increases in iNOS and arginase expression result in unchanged NO species and protein S-nitrosylation; with substrate limitation, uncoupled iNOS produces superoxide anions and contributes to contractile dysfunction.
Collapse
Affiliation(s)
- Philipp Heusch
- Institute for Pathophysiology, Univ. of Essen Medical School, Hufelandstrasse 55, 45122 Essen, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Deindl E, Fischer S, Preissner KT. New directions in inflammation and immunity: the multi-functional role of the extracellular RNA/RNase system. Indian J Biochem Biophys 2009; 46:461-466. [PMID: 20361709] [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: 05/29/2023]
Abstract
In the mid-eighties of the last century, extracellular-proteolipid complexes have been identified in tumor patients and circulating RNA was suggested to represent a specific secretory product of cancer cells. The presence of specific types of RNA in a variety of cancer types proved to be useful in cancer diagnosis. It has been suggested that extracellular RNA and DNA are not inert molecules, but contain biological activities. Recent data have demonstrated that extracellular RNA is likely to present the up to now undefined "natural foreign surface", serving as an initiating factor in blood coagulation in vivo. Yet, extracellular RNA seems to have even more functions. Investigations on blood-brain-barrier have shown that extracellular RNA mediates endothelial permeability. Ample success has been achieved in administrating RNase in different animal models of vascular diseases, thereby significantly delaying thrombus formation and reducing cerebral edema formation with neuroprotection in acute stroke models. Furthermore, extracellular mammalian RNA was found to decrease tumor yield in a murine model system, suggesting that extracellular RNA might trigger immune response. Finally, extracellular nucleic acids were identified as danger signals involved in innate immunity related to neutrophil-mediated bacterial killing and haemocyte activation and coagulation in the insects. Thus, a new area of research on extracellular RNA functions with promising future perspectives just started in the field of inflammation and immunity.
Collapse
Affiliation(s)
- Elisabeth Deindl
- Walter-Brendel-Center for Experimental Medicine, Ludwig-Maximilians-University, Munich, Germany.
| | | | | |
Collapse
|
47
|
Fisslthaler B, Boengler K, Fleming I, Schaper W, Busse R, Deindl E. Identification of a cis -Element Regulating Transcriptional Activity in Response to Fluid Shear Stress in Bovine Aortic Endothelial Cells. ACTA ACUST UNITED AC 2009; 10:267-75. [PMID: 14660087 DOI: 10.1080/10623320390246324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 10/23/2022]
Abstract
Fluid shear stress exerts numerous effects on gene expression in endothelial cells. To investigate the regulatory mechanisms involved, we designed oligonucleotides composed of a 20-bp core containing the classical shear stress response element (SSRE+) or of a 20-bp core, in which base pairs flanking the SSRE were mutated (SSRE-). Hexamers of the oligonucleotides were cloned in front of reporter genes, transfected in bovine aortic endothelial cells (BAECs), and subjected to either a continuous low shear stress (3 dynes cm(-2)) or to a stepwise increase in shear stress from 3 dynes cm(-2) to 12 dynes cm(-2) (16/4 h). Shear stress increased reporter gene activity in cells transfected with pSSRE-, but not with pSSRE+. Cyclic strain (6%, 1 Hz, 4 h) did not significantly affect reporter gene activity. In gel retardation assays, more proteins bound to SSRE- than to SSRE+ in response to high shear stress. In competition experiments, a cAMP response element-binding (CREB) protein-specific oligonucleotide suppressed protein binding to the SSRE-; however, an antibody directed against CREB itself did not affect protein binding to the SSRE+. Our results indicate that the sequence ACC(G)/(T)AGACCAG represents a novel SSRE and that a protein that binds a CREB-specific oligonucleotide is part of the complex implicated in response to shear stress.
Collapse
Affiliation(s)
- Beate Fisslthaler
- Institut für Kardiovaskuläre Physiologie, Klinikum der J. W. Goethe Universität, Frankfurt am Main, Germany.
| | | | | | | | | | | |
Collapse
|
48
|
Mueller-Hoecker J, Beitinger F, Fernandez B, Bahlmann O, Assmann G, Troidl C, Dimomeletis I, Kääb S, Deindl E. Of rodents and humans: a light microscopic and ultrastructural study on cardiomyocytes in pulmonary veins. Int J Med Sci 2008; 5:152-8. [PMID: 18612369 PMCID: PMC2443344 DOI: 10.7150/ijms.5.152] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Accepted: 06/22/2008] [Indexed: 11/05/2022] Open
Abstract
Cardiomyocytes in pulmonary veins (PVs) have been reported in rodents and humans. In humans they were related to atrial arrhythmias, including atrial fibrillation (AF). To investigate histological similarities and differences in PV cardiomyocyte localization and distribution, we performed comparative light and electron microscopic studies on humans, rats and mice, and generated a transgenic mouse strain. Results on mice (C57BL/6 and BALBc) and rats (Wistar) revealed that cardiomyocytes regularly extend from the hilus along venous vessels into the lung tissue surrounding individual intrapulmonary veins of varying diameters (70-250 microm). The cardiomyocytes showed the ultrastructure of a normal working myocardium with intact intercalated discs and tightly packed contractile filaments. In both lung and hilus cardiomyocytes were localized either close to the basal lamina of the endothelium or separated from it by smooth muscle cells and/or collagen fibres. In humans (autopsies, n=20) extrapericardiac cardiomyocytes were only found in 23 out of 78 veins and showed an incomplete sleeve at the lung hilus. In addition, cardiomyocytes occurred significantly more often in right than in left veins, however, never in intrapulmonary veins. We discuss the hypothesis that the variance in distribution of PV cardiomyocytes in humans and rodents might reflect the difference in pathogenesis and development of AF.
Collapse
|
49
|
Zaruba MM, Huber BC, Brunner S, Deindl E, David R, Fischer R, Assmann G, Herbach N, Grundmann S, Wanke R, Mueller-Hoecker J, Franz WM. Parathyroid hormone treatment after myocardial infarction promotes cardiac repair by enhanced neovascularization and cell survival. Cardiovasc Res 2007; 77:722-31. [PMID: 18055578 DOI: 10.1093/cvr/cvm080] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIMS An ongoing concept is that stem cells have the potential to regenerate the injured myocardium. In addition to direct vasorelaxing effects on the vasculature, which are mediated by an increased cAMP production leading to a decreased calcium influx in smooth muscle cells, parathyroid hormone (PTH) was recently shown to facilitate stem cell mobilization. Therefore, we analysed in a murine model of experimental myocardial infarction (MI) the influence of PTH treatment on survival, functional parameters, stem cell migration, and expression of vascular endothelial growth factor A (VEGF-A). METHODS AND RESULTS Mice (C57BL/6) were treated with PTH (80 microg/kg/d) for up to 14 days after coronary artery ligation. Functional and immunohistochemical analyses were performed at days 6 and 30 after MI. Stem cells and VEGF expression in the myocardium were analysed by FACS and qRT-PCR at day 2 after MI. PTH-treated animals revealed a significant improvement of post-MI survival and myocardial function that was related to a subsequent reduction of left ventricular wall thinning and scar extension. Infarcted hearts of PTH-treated mice revealed increased numbers of CD45(+)/CD34(+) progenitor cells as well as an upregulation of VEGF-A mRNA associated with increased neovascularization and cell survival. CONCLUSIONS PTH application after MI increases migration of angiogenic CD45(+)/CD34(+) progenitor cells to the ischaemic heart, which may attenuate ischaemic cardiomyopathy. As PTH is already used in patients with osteoporosis, our findings may have a direct impact on the initiation of clinical studies in patients with ischaemic heart disease.
Collapse
Affiliation(s)
- Marc-Michael Zaruba
- Klinikum der Ludwig-Maximilians-Universität München Grosshadern, Med Klinik und Poliklinik I, Marchioninistr 15, Munich, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Deindl E. Arteriogenesis: a focus on signal transduction cascades and transcription factors. Thromb Haemost 2007; 98:940-943. [PMID: 18000596] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In recent years intensive investigations have been performed to unravel the molecular mechanisms of collateral artery growth (arteriogenesis), a process designed by nature to compensate the devastating consequences of major arterial occlusions. Currently, a variety of gene products as well as signal transduction pathways involved in arteriogenesis have been identified. However, it is still not clear how the progression of cellular signals evoked by an increased blood flow and therefore mechanical stress proceeds. Literature research identified the transcription factors early growth response-1 (Egr-1) as well as serum response factor (SRF) and myocardin-related transcription factors (MRTFs) as liaisons connecting the key pathways of arteriogenesis, i.e. the Rho-kinase pathway and the MEK/ERK pathway, with each other as well as with downstream genes.
Collapse
Affiliation(s)
- Elisabeth Deindl
- Institute of Physiology, Ludwig-Maximilians-University, Schillerstr. 44, 80336 Munich, Germany.
| |
Collapse
|