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Le Chapelain O, Jadoui S, Gros A, Barbaria S, Benmeziane K, Ollivier V, Dupont S, Solo Nomenjanahary M, Mavouna S, Rogozarski J, Mawhin MA, Caligiuri G, Delbosc S, Porteu F, Nieswandt B, Mangin PH, Boulaftali Y, Ho-Tin-Noé B. The localization, origin, and impact of platelets in the tumor microenvironment are tumor type-dependent. J Exp Clin Cancer Res 2024; 43:84. [PMID: 38493157 PMCID: PMC10944607 DOI: 10.1186/s13046-024-03001-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 03/01/2024] [Indexed: 03/18/2024] Open
Abstract
BACKGROUND How platelets interact with and influence the tumor microenvironment (TME) remains poorly characterized. METHODS We compared the presence and participation of platelets in the TME of two tumors characterized by highly different TME, PyMT AT-3 mammary tumors and B16F1 melanoma. RESULTS We show that whereas firmly adherent platelets continuously line tumor vessels of both AT-3 and B16F1 tumors, abundant extravascular stromal clusters of platelets from thrombopoietin-independent origin were present only in AT-3 mammary tumors. We further show that platelets influence the angiogenic and inflammatory profiles of AT-3 and B16F1 tumors, though with very different outcomes according to tumor type. Whereas thrombocytopenia increased bleeding in both tumor types, it further caused severe endothelial degeneration associated with massive vascular leakage, tumor swelling, and increased infiltration of cytotoxic cells, only in AT-3 tumors. CONCLUSIONS These results indicate that while platelets are integral components of solid tumors, their localization and origin in the TME, as well as their impact on its shaping, are tumor type-dependent.
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Affiliation(s)
- Ophélie Le Chapelain
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
| | - Soumaya Jadoui
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | - Angèle Gros
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | - Samir Barbaria
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | | | - Véronique Ollivier
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | - Sébastien Dupont
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
| | - Mialitiana Solo Nomenjanahary
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
| | - Sabrina Mavouna
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
| | - Jasmina Rogozarski
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France
| | - Marie-Anne Mawhin
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | | | - Sandrine Delbosc
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | | | - Bernhard Nieswandt
- Institute of Experimental Biomedicine I, University Hospital Würzburg and Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, Würzburg, Germany
| | - Pierre H Mangin
- Université de Strasbourg, Institut National de la Santé et de la Recherche Médicale, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, F-67065, France
| | - Yacine Boulaftali
- Université Paris Cité, INSERM UMR 1148, LVTS, Paris, F-75018, France
| | - Benoit Ho-Tin-Noé
- Faculté de Pharmacie de Paris, Université Paris Cité, Inserm UMR-S 1144 -Optimisation Thérapeutique en Neuropsychopharmacologie, 4 avenue de l'Observatoire, Paris, 75006, France.
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2
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Li S, Lu Z, Wu S, Chu T, Li B, Qi F, Zhao Y, Nie G. The dynamic role of platelets in cancer progression and their therapeutic implications. Nat Rev Cancer 2024; 24:72-87. [PMID: 38040850 DOI: 10.1038/s41568-023-00639-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/13/2023] [Indexed: 12/03/2023]
Abstract
Systemic antiplatelet treatment represents a promising option to improve the therapeutic outcomes and therapeutic efficacy of chemotherapy and immunotherapy due to the critical contribution of platelets to tumour progression. However, until recently, targeting platelets as a cancer therapeutic has been hampered by the elevated risk of haemorrhagic and thrombocytopenic (low platelet count) complications owing to the lack of specificity for tumour-associated platelets. Recent work has advanced our understanding of the molecular mechanisms responsible for the contribution of platelets to tumour progression and metastasis. This has led to the identification of the biological changes in platelets in the presence of tumours, the complex interactions between platelets and tumour cells during tumour progression, and the effects of platelets on antitumour therapeutic response. In this Review, we present a detailed picture of the dynamic roles of platelets in tumour development and progression as well as their use in diagnosis, prognosis and monitoring response to therapy. We also provide our view on how to overcome challenges faced by the development of precise antiplatelet strategies for safe and efficient clinical cancer therapy.
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Affiliation(s)
- Suping Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
| | - Zefang Lu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Suying Wu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Tianjiao Chu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
- College of Pharmaceutical Science, Jilin University, Changchun, China
| | - Bozhao Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
| | - Feilong Qi
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
- Department of Chemistry, Tsinghua University, Beijing, China
| | - Yuliang Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Guangjun Nie
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
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3
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Kim J, Sunkara V, Kim J, Ro J, Kim CJ, Clarissa EM, Jung SW, Lee HJ, Cho YK. Prediction of tumor metastasis via extracellular vesicles-treated platelet adhesion on a blood vessel chip. LAB ON A CHIP 2022; 22:2726-2740. [PMID: 35763032 DOI: 10.1039/d2lc00364c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In preclinical and clinical studies, it has been demonstrated that tumor-educated platelets play a critical role in tumorigenesis, cancer development, and metastasis. Unlike the role of cancer-derived chemokines in platelet activation, the role of cancer-derived extracellular vesicles (EVs) has remained elusive. Here, we found that interleukin-8 (IL-8) in cancer-derived EVs contributed to platelet activation by increasing P-selectin expression and ligand affinity, resulting in increased platelet adhesion on the human vessel-mimicking microfluidic system. Furthermore, platelet adhesion levels on vessels treated with human plasma-derived EVs demonstrated good discrimination between breast cancer patients with metastasis and those without, with the area under the curve (AUC) value of 0.88. While EpCAM expression on EVs could detect the existence of a tumor (AUC = 0.89), it performed poorly in predicting metastasis (AUC = 0.42). We believe that these findings shed light on the role of the interaction between cancer-derived EVs and platelets in pre-metastatic niche formation and tumor metastasis, potentially leading to the development of platelet-tumor interaction-based novel diagnostic and therapeutic strategies.
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Affiliation(s)
- Junyoung Kim
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Vijaya Sunkara
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Jungmin Kim
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Jooyoung Ro
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Chi-Ju Kim
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Elizabeth Maria Clarissa
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Sung Wook Jung
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea
| | - Hee Jin Lee
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 05505, Republic of Korea
| | - Yoon-Kyoung Cho
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
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Luque‐González MA, Reis RL, Kundu SC, Caballero D. Human Microcirculation‐on‐Chip Models in Cancer Research: Key Integration of Lymphatic and Blood Vasculatures. ACTA ACUST UNITED AC 2020; 4:e2000045. [DOI: 10.1002/adbi.202000045] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/27/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Maria Angélica Luque‐González
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineICVS/3B’s—PT Government Associate Laboratory AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra 4805‐017 Barco Braga/Guimarães Portugal
| | - Rui Luis Reis
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineICVS/3B’s—PT Government Associate Laboratory AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra 4805‐017 Barco Braga/Guimarães Portugal
| | - Subhas Chandra Kundu
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineICVS/3B’s—PT Government Associate Laboratory AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra 4805‐017 Barco Braga/Guimarães Portugal
| | - David Caballero
- 3B’s Research Group, I3Bs—Research Institute on Biomaterials Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineICVS/3B’s—PT Government Associate Laboratory AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra 4805‐017 Barco Braga/Guimarães Portugal
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5
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Martín-Granado V, Ortiz-Rivero S, Carmona R, Gutiérrez-Herrero S, Barrera M, San-Segundo L, Sequera C, Perdiguero P, Lozano F, Martín-Herrero F, González-Porras JR, Muñoz-Chápuli R, Porras A, Guerrero C. C3G promotes a selective release of angiogenic factors from activated mouse platelets to regulate angiogenesis and tumor metastasis. Oncotarget 2017; 8:110994-111011. [PMID: 29340032 PMCID: PMC5762300 DOI: 10.18632/oncotarget.22339] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/25/2017] [Indexed: 11/25/2022] Open
Abstract
Previous observations indicated that C3G (RAPGEF1) promotes α-granule release, evidenced by the increase in P-selectin exposure on the platelet surface following its activation. The goal of the present study is to further characterize the potential function of C3G as a modulator of the platelet releasate and its implication in the regulation of angiogenesis. Proteomic analysis revealed a decreased secretion of anti-angiogenic factors from activated transgenic C3G and C3G∆Cat platelets. Accordingly, the secretome from both transgenic platelets had an overall pro-angiogenic effect as evidenced by an in vitro capillary-tube formation assay with HUVECs (human umbilical vein endothelial cells) and by two in vivo models of heterotopic tumor growth. In addition, transgenic C3G expression in platelets greatly increased mouse melanoma cells metastasis. Moreover, immunofluorescence microscopy showed that the pro-angiogenic factors VEGF and bFGF were partially retained into α-granules in thrombin- and ADP-activated mouse platelets from both, C3G and C3GΔCat transgenic mice. The observed interaction between C3G and Vesicle-associated membrane protein (Vamp)-7 could explain these results. Concomitantly, increased platelet spreading in both transgenic platelets upon thrombin activation supports this novel function of C3G in α-granule exocytosis. Collectively, our data point out to the co-existence of Rap1GEF-dependent and independent mechanisms mediating C3G effects on platelet secretion, which regulates pathological angiogenesis in tumors and other contexts. The results herein support an important role for platelet C3G in angiogenesis and metastasis.
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Affiliation(s)
- Víctor Martín-Granado
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Sara Ortiz-Rivero
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Rita Carmona
- Departamento de Biología Animal, Universidad de Málaga, Málaga, Spain
| | - Sara Gutiérrez-Herrero
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Mario Barrera
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
| | - Laura San-Segundo
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Celia Sequera
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Pedro Perdiguero
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- Departamento de Cardiología, Hospital Universitario de Salamanca, Universidad de Salamanca, Salamanca, Spain
| | - Francisco Lozano
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- Departamento de Angiología y Cirugía Vascular, Hospital Universitario de Salamanca, Universidad de Salamanca, Salamanca, Spain
| | - Francisco Martín-Herrero
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- Departamento de Cardiología, Hospital Universitario de Salamanca, Universidad de Salamanca, Salamanca, Spain
| | - José Ramón González-Porras
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- Departamento de Hematología, Hospital Universitario de Salamanca, Universidad de Salamanca, Salamanca, Spain
| | | | - Almudena Porras
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Carmen Guerrero
- Instituto de Biología Molecular y Celular del Cáncer, USAL-CSIC, Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- Departamento de Medicina, Universidad de Salamanca, Salamanca, Spain
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6
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Microvasculature on a chip: study of the Endothelial Surface Layer and the flow structure of Red Blood Cells. Sci Rep 2017; 7:45036. [PMID: 28338083 PMCID: PMC5364477 DOI: 10.1038/srep45036] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 02/17/2017] [Indexed: 12/20/2022] Open
Abstract
Microvasculatures-on-a-chip, i.e. in vitro models that mimic important features of microvessel networks, have gained increasing interest in recent years. Such devices have allowed investigating pathophysiological situations involving abnormal biophysical interactions between blood cells and vessel walls. Still, a central question remains regarding the presence, in such biomimetic systems, of the endothelial glycocalyx. The latter is a glycosaminoglycans-rich surface layer exposed to blood flow, which plays a crucial role in regulating the interactions between circulating cells and the endothelium. Here, we use confocal microscopy to characterize the layer expressed by endothelial cells cultured in microfluidic channels. We show that, under our culture conditions, endothelial cells form a confluent layer on all the walls of the circuit and display a glycocalyx that fully lines the lumen of the microchannels. Moreover, the thickness of this surface layer is found to be on the order of 600 nm, which compares well with measurements performed ex or in vivo on microcapillaries. Furthermore, we investigate how the presence of endothelial cells in the microchannels affects their hydrodynamic resistance and the near-wall motion of red blood cells. Our study thus provides an important insight into the physiological relevance of in vitro microvasculatures.
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7
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Ohno S, Saitoh Y, Ohno N, Terada N. Renaissance of morphological studies: the examination of functional structures in living animal organs using the in vivo cryotechnique. Anat Sci Int 2016; 92:55-78. [DOI: 10.1007/s12565-016-0355-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 06/27/2016] [Indexed: 11/28/2022]
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8
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Gottschalk O, Metz P, Dao Trong ML, Altenberger S, Jansson V, Mutschler W, Schmitt-Sody M. Therapeutic effect of methotrexate encapsulated in cationic liposomes (EndoMTX) in comparison to free methotrexate in an antigen-induced arthritis study in vivo. Scand J Rheumatol 2015; 44:456-63. [DOI: 10.3109/03009742.2015.1030448] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Packham IM, Watson SP, Bicknell R, Egginton S. In vivo evidence for platelet-induced physiological angiogenesis by a COX driven mechanism. PLoS One 2014; 9:e107503. [PMID: 25238071 PMCID: PMC4169573 DOI: 10.1371/journal.pone.0107503] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 08/19/2014] [Indexed: 12/20/2022] Open
Abstract
We sought to determine a role for platelets in in vivo angiogenesis, quantified by changes in the capillary to fibre ratio (C:F) of mouse skeletal muscle, utilising two distinct forms of capillary growth to identify differential effects. Capillary sprouting was induced by muscle overload, and longitudinal splitting by chronic hyperaemia. Platelet depletion was achieved by anti-GPIbα antibody treatment. Sprouting induced a significant increase in C:F (1.42±0.02 vs. contralateral 1.29±0.02, P<0.001) that was abolished by platelet depletion, while the significant C:F increase caused by splitting (1.40±0.03 vs. control 1.28±0.03, P<0.01) was unaffected. Granulocyte/monocyte depletion showed this response was not immune-regulated. VEGF overexpression failed to rescue angiogenesis following platelet depletion, suggesting the mechanism is not simply reliant on growth factor release. Sprouting occurred normally following antibody-induced GPVI shedding, suggesting platelet activation via collagen is not involved. BrdU pulse-labelling showed no change in the proliferative potential of cells associated with capillaries after platelet depletion. Inhibition of platelet activation by acetylsalicylic acid abolished sprouting, but not splitting angiogenesis, paralleling the response to platelet depletion. We conclude that platelets differentially regulate mechanisms of angiogenesis in vivo, likely via COX signalling. Since endothelial proliferation is not impaired, we propose a link between COX1 and induction of endothelial migration.
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Affiliation(s)
- Ian M Packham
- Centre for Cardiovascular Sciences, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Steve P Watson
- Centre for Cardiovascular Sciences, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Roy Bicknell
- Centre for Cardiovascular Sciences, School of Immunity and Infection, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Stuart Egginton
- Centre for Cardiovascular Sciences, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom; School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
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10
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Abstract
Functionally, platelets are primarily recognized as key regulators of thrombosis and hemostasis. Upon vessel injury, the typically quiescent platelet interacts with subendothelial matrix to regulate platelet adhesion, activation and aggregation, with subsequent induction of the coagulation cascade forming a thrombus. Recently, however, newly described roles for platelets in the regulation of angiogenesis have emerged. Platelets possess an armory of pro- and anti-angiogenic proteins, which are actively sequestered and highly organized in α-granule populations. Platelet activation facilitates their release, eliciting potent angiogenic responses through mechanisms that appear to be tightly regulated. In conjunction, the release of platelet-derived phospholipids and microparticles has also earned merit as synergistic regulators of angiogenesis. Consequently, platelets have been functionally implicated in a range of angiogenesis-dependent processes, including physiological roles in wound healing, vascular development and blood/lymphatic vessel separation, whilst facilitating aberrant angiogenesis in a range of diseases including cancer, atherosclerosis and diabetic retinopathy. Whilst the underlying mechanisms are only starting to be elucidated, significant insights have been established, suggesting that platelets represent a promising therapeutic strategy in diseases requiring angiogenic modulation. Moreover, anti-platelet therapies targeting thrombotic complications also exert protective effects in disorders characterized by persistent angiogenesis.
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Affiliation(s)
- Tony G Walsh
- School of Physiology and Pharmacology, University of Bristol , Bristol , UK and
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11
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Saitoh Y, Terada N, Ohno N, Hamano A, Okumura N, Jin T, Saiki I, Ohno S. Imaging of thrombosis and microcirculation in mouse lungs of initial melanoma metastasis with in vivo cryotechnique. Microvasc Res 2013; 91:73-83. [PMID: 24316421 DOI: 10.1016/j.mvr.2013.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 11/22/2013] [Accepted: 11/23/2013] [Indexed: 01/30/2023]
Abstract
Microscopic bioimaging of blood flow and distribution of cancer cells in lungs is essential to analyze mechanism of lung metastasis. Such cancer metastasis has been well known to induce hypercoagulable states and thrombosis. In histopathological tissue sections, however, it has been difficult to capture rapid phenomenon of thrombus formation due to technical problems associated with much less retention of soluble serum components as well as dynamic histological features reflecting their living states. In this study, to achieve bioimaging of both hypercoagulable states and thrombosis induced by early metastasis of mouse B16-BL6 melanoma, "in vivo cryotechnique" (IVCT) was used, which retained soluble components at their original sites. Glutathione-coated quantum dots (QDs) were subsequently injected after melanoma cells via right ventricles to examine plasma flow with fluorescence emission. At 5s after the melanoma injection, melanoma cells were mostly stacked and intruded in alveolar capillaries with changing their shapes. Assembly of platelets initially appeared at 1min, and they aggregated around the stacked melanoma cells at 5min. Such aggregated platelets were immunopositive for both phospho-tyrosine 418 and 527 of Src, indicating their partial signal activation. Fibrin monomers were also immunolocalized around both melanoma cells and platelet aggregates, and massive immunoreaction deposits of fibrinogen were also detected near the same areas, but more strongly detected around the melanoma cells, indicating initial thrombus formation. In those areas, QDs were rarely detected, probably because of the lack of blood supply. Thus, IVCT revealed histopathological features of initial thrombosis under their circulatory conditions.
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Affiliation(s)
- Yurika Saitoh
- Department of Anatomy and Molecular Histology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo City, Yamanashi 409-3898, Japan.
| | - Nobuo Terada
- Department of Anatomy and Molecular Histology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo City, Yamanashi 409-3898, Japan; Department of Occupational Therapy, School of Health Sciences, Shinshu University School of Medicine, Matsumoto City, Nagano 390-8621, Japan.
| | - Nobuhiko Ohno
- Department of Anatomy and Molecular Histology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo City, Yamanashi 409-3898, Japan.
| | - Akiei Hamano
- Central Research Laboratory of Nissui Pharmaceutical Co. Ltd., Yuuki City, Ibaraki 307-0036, Japan.
| | - Nobuo Okumura
- Department of Biomedical Laboratory Sciences, Laboratory of Clinical Chemistry, School of Health Sciences, Shinshu University School of Medicine, Matsumoto City, Nagano 390-8621, Japan.
| | - Takashi Jin
- Laboratory for Nano-Bio Probes, RIKEN Quantitative Biology Center, Suita City, Osaka 565-0874, Japan.
| | - Ikuo Saiki
- Division of Pathogenic Biochemistry, Institute of Natural Medicine, University of Toyama, Toyama City, Toyama 930-0194, Japan.
| | - Shinichi Ohno
- Department of Anatomy and Molecular Histology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo City, Yamanashi 409-3898, Japan.
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12
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Zheng S, Liu Y, Jiao Y, Wei M, Zeng X. Chemically modified heparins inhibit fibrinogen-bridged indirect adhesion between tumor cells and platelets. Oncol Lett 2012; 3:497-502. [PMID: 22740939 DOI: 10.3892/ol.2011.510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 11/24/2011] [Indexed: 11/05/2022] Open
Abstract
The interaction between platelets and tumor cells is critical for the hematogenous metastasis of tumor cells. We recently reported that fibrinogen was capable of bridging and enhancing the interaction of platelets and tumor cells under conditions of physical shear force. In the present study, we aimed to detect the effects of 8 chemically modified heparins on the binding of fibrinogen to platelets or tumor cells using flow cytometry assays, as well as the fibrinogen-bridged adhesion of platelets and tumor cells using flow chamber assays. The results showed that fibrinogen binds to platelets and tumor cells in a β3 integrin-dependent manner and bridges the adhesion between platelets and tumor cells. Heparin and certain chemically modified heparins, including borohydride-reduced (RO)-, carboxyl-reduced (CR)- and 2-O, 3-O-desulfated (2/3ODS)-heparins, inhibited the β3 integrin-dependent adhesion of fibrinogen to platelets or tumor cells, and consequently blocked the fibrinogen-bridged indirect adhesion of platelets to tumor cells. These data indicate that chemically modified heparins should be potential inhibitors for the fibrinogen-bridged indirect adhesion of platelets and tumor cells, which provides a novel explanation of the anti-adhesion property of heparin and proposes a new anti-metastatic target for cancer treatment.
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Affiliation(s)
- Sheng Zheng
- Institute of Genetics and Cytology, School of Life Science, Northeast Normal University, 130024 Changchun
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13
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Abstract
The haemostatic role of platelets was established in the 1880s by Bizzozero who observed their ability to adhere and aggregate at sites of vascular injury. It was only some 80 years later that the function of platelets in maintaining the structural integrity of intact blood vessels was reported by Danielli. Danielli noted that platelets help preserve the barrier function of endothelium during organ perfusion. Subsequent studies have demonstrated further that platelets are continuously needed to support intact mature blood vessels. More recently, platelets were shown to safeguard developing vessels, lymphatics, as well as the microvasculature at sites of leukocyte infiltration, including inflamed organs and tumours. Interestingly, from a mechanistic point of view, the supporting role of platelets in these various vessels does not necessarily involve the well-understood process of platelet plug formation but, rather, may rely on secretion of the various platelet granules and their many active components. The present review focuses on these nonconventional aspects of platelet biology and function by presenting situations in which platelets intervene to maintain vascular integrity and discusses possible mechanisms of their actions. We propose that modulating these newly described platelet functions may help treat haemorrhage as well as treat cancer by increasing the efficacy of drug delivery to tumours.
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14
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Release of angiogenesis regulatory proteins from platelet alpha granules: modulation of physiologic and pathologic angiogenesis. Blood 2011; 118:1359-69. [PMID: 21680800 DOI: 10.1182/blood-2011-02-334524] [Citation(s) in RCA: 259] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
An association between platelets, angiogenesis, and cancer has long been recognized, but the mechanisms linking them remains unclear. Platelets regulate new blood vessel growth through numerous stimulators and inhibitors of angiogenesis by several pathways, including differential exocytosis of angiogenesis regulators. Herein, we investigated the differential release of angiogenesis stimulators and inhibitors from platelets. Activation of human platelets with adenosine diphosphate (ADP) stimulated the release of VEGF, but not endostatin whereas, thromboxane A(2) (TXA(2)) released endostatin but not VEGF. Platelet releasates generated by activation with ADP promoted migration and formation of capillary structures by human umbilical vein endothelial cells (HUV-EC-Cs) in in vitro angiogenesis models. Conversely, TXA(2)-stimulated platelet releasate inhibited migration and formation of capillary structures. Because tumor growth beyond 1-2 mm(3) is angiogenesis-dependent, we hypothesized that cancer cells preferentially stimulate platelets to secrete their pro-angiogenic payload. In support of this, the breast cancer cell line MCF-7 stimulated secretion of VEGF and a pro-angiogenic releasate from platelets. Furthermore, the antiplatelet agent aspirin inhibited platelet-mediated angiogenesis after exposure to ADP or MCF-7 cells providing a potential mechanism for how aspirin may impact malignancy. Manipulation of differentially mediated release of angiogenic factors from platelets may provide a new modality for cancer treatment.
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15
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Differential effects of tumor–platelet interaction in vitro and in vivo in glioblastoma. J Neurooncol 2011; 105:45-56. [DOI: 10.1007/s11060-011-0560-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Accepted: 02/21/2011] [Indexed: 10/18/2022]
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16
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Roedersheimer M, Nijmeh H, Burns N, Sidiakova AA, Stenmark KR, Gerasimovskaya EV. Complementary effects of extracellular nucleotides and platelet-derived extracts on angiogenesis of vasa vasorum endothelial cells in vitro and subcutaneous Matrigel plugs in vivo. Vasc Cell 2011; 3:4. [PMID: 21349161 PMCID: PMC3045351 DOI: 10.1186/2045-824x-3-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 02/02/2011] [Indexed: 02/07/2023] Open
Abstract
Background Platelets contribute to vascular homeostasis and angiogenesis through the release of multiple growth factors, cytokines and nucleotides, such as ATP and ADP. Recent reports have demonstrated a marked growth-promoting effect of total platelet extracts and selected platelet growth factors on therapeutic angiogenesis. However, since endogenous adenine nucleotides are rapidly degraded during the platelet isolation and storage, we examined whether supplementing a platelet-derived extract with exogenous adenine nucleotides would augment their pro-angiogenic effects. Methods Pulmonary artery vasa vasorum endothelial cells (VVEC) were used to examine the effects of dialyzed platelet-derived soluble extracts and extracellular adenine nucleotides on proliferation, migration and tube formation. In addition, an in vivo Matrigel plug assay was used to examine the effects of platelet extracts and adenine nucleotides on neovascularization of plugs subcutaneously placed in 50 ICR mice. The number of vascular structures in Matrigel plugs were evaluated by histological and statistical methods. Results Platelet extracts (6.4-64 μg/ml) significantly induced DNA synthesis and at a concentration of 64 μg/ml had a biphasic effect on VVEC proliferation (an increase at 48 hrs followed by a decrease at 60 hrs). Stimulation of VVEC with platelet extracts also significantly (up to several-fold) increased cell migration and tube formation on Matrigel. Stimulation of VVEC with extracellular ATP (100 μM) dramatically (up to ten-fold) increased migration and tube formation on Matrigel; however, no significant effects on cell proliferation were observed. We also found that ATP moderately diminished platelet extract-induced VVEC proliferation (48 hrs) and migration, but potentiated tube formation. Neither ATP, or a mixture of non-hydrolyzable nucleotides (ATPγS, ADPβS, MeSATP, MeSADP) induced vascularization of Matrigel plugs subcutaneously injected in mice, however, the combination of these nucleotides with platelet extracts dramatically increased the number of functional capillaries in the Matrigel plugs. Conclusion Data from this study suggest that platelet-derived growth factors and extracellular nucleotides represent important regulatory signals for angiogenesis. Supplementation of platelet extracts with exogenous adenine nucleotides may reveal new possibilities for therapeutic angiogenesis and tissue regeneration approaches.
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Affiliation(s)
- Mark Roedersheimer
- Department of Pediatrics, University of Colorado Denver, 12700 East 19th Ave, Aurora, CO 80045, USA.
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17
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Abstract
Traditionally viewed as major cellular components in hemostasis and thrombosis, the contribution of platelets to the progression of cancer is an emerging area of research interest. Complex interactions between tumor cells and circulating platelets play an important role in cancer growth and dissemination, and a growing body of evidence supports a role for physiologic platelet receptors and platelet agonists in cancer metastases and angiogenesis. Platelets provide a procoagulant surface facilitating amplification of cancer-related coagulation, and can be recruited to shroud tumor cells, thereby shielding them from immune responses, and facilitate cancer growth and dissemination. Experimental blockade of key platelet receptors, such as GP1b/IX/V, GPIIbIIIa and GPVI, has been shown to attenuate metastases. Platelets are also recognized as dynamic reservoirs of proangiogenic and anti-angiogenic proteins that can be manipulated pharmacologically. A bidirectional relationship between platelets and tumors is also seen, with evidence of 'tumor conditioning' of platelets. The platelet as a reporter of malignancy and a targeted delivery system for anticancer therapy has also been proposed. The development of platelet inhibitors that influence malignancy progression and clinical testing of currently available antiplatelet drugs represents a promising area of targeted cancer therapy.
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Affiliation(s)
- N M Bambace
- Division of Hematology and Oncology, Department of Medicine, University of Vermont, Burlington, VT 05401, USA
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18
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Abstract
Extensive experimental evidence shows that platelets support tumour metastasis. The activation of platelets and the coagulation system have a crucial role in the progression of cancer. Within the circulatory system, platelets guard tumour cells from immune elimination and promote their arrest at the endothelium, supporting the establishment of secondary lesions. These contributions of platelets to tumour cell survival and spread suggest platelets as a new avenue for therapy.
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Affiliation(s)
- Laurie J Gay
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
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19
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Abstract
Heparin and its improved version, low-molecular weight heparin (LMWH), are known to exert polypharmacological effects at various levels. Early studies focused on the plasma anti-Xa and anti-IIa pharmacodynamics of different LMWHs. Other important pharmacodynamic parameters for heparin and LMWH, including effects on vascular tissue factor pathway inhibitor (TFPI) release, inhibition of inflammation through NFkappaB, inhibition of key matrix-degrading enzymes, selectin modulation, inhibition of platelet-cancer cell interactions, and inflammatory cell adhesion, help explain the diverse clinical impact of this class of agents in thrombosis and beyond.
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Affiliation(s)
- Shaker A Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY, USA
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20
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Schmitt-Sody M, Metz P, Klose A, Gottschalk O, Zysk S, Hausdorf J, Veihelmann A, Jansson V. In vivo interactions of platelets and leucocytes with the endothelium in murine antigen‐induced arthritis: the role of P‐selectin. Scand J Rheumatol 2009; 36:311-9. [PMID: 17763210 DOI: 10.1080/03009740701218741] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE Platelets are thought to participate in the pathogenesis of chronic inflammatory diseases such as rheumatoid arthritis (RA). We showed recently an in vivo increase in platelet-endothelial cell interactions in mice with antigen-induced arthritis (AiA). The underlying mechanisms are not yet clear. The aim of this study was to investigate the impact of P-selectin in AiA by means of intravital fluorescence microscopy (IVM). METHODS C57/Bl6 mice and P-selectin-deficient mice were divided into four groups (n = 7; control/AiA per strain). The extent of AiA was assessed by measuring knee joint swelling and by histological scoring. Rolling and adherent fluorescence-labelled platelets and leucocytes were investigated by IVM. RESULTS In arthritic P-selectin-deficient mice (rolling: 0.05+/-0.01; adherent: 130+/-20 mm(-2)), compared to arthritic C57/Bl6 mice (rolling: 0.20+/-0.04; adherent: 1910+/-200 mm(-2)), platelet interaction was significantly reduced (p<0.05) and reached the level of both control groups without AiA. In addition, interaction of leucocytes in P-selectin-deficient arthritic animals (rolling: 0.12+/-0.06; adherent: 387+/-37 mm(-2)) was significantly decreased in comparison to arthritic C57/Bl6 animals (rolling: 0.21+/-0.06; adherent: 1492+/-284 mm(-2); p<0.05). Swelling of the knee joint and histological scoring were reduced in arthritic P-selectin-deficient mice compared to arthritic C57/Bl6 mice. CONCLUSION We have demonstrated for the first time in vivo a significant decrease in the interaction of platelets and leucocytes with the endothelium in P-selectin-deficient mice with AiA and a reduction in clinical and histological symptoms of arthritis. These findings suggest that leucocyte-endothelial cell interactions depend at least partially on platelet P-selectin and therefore platelets may be responsible for the leucocyte tissue damage in AiA.
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Affiliation(s)
- M Schmitt-Sody
- Department of Orthopaedics, Klinikum Grosshadern, Ludwig Maximilians University of Munich, Germany.
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21
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Abstract
Solid tumors generate a prothrombotic environment capable of platelet activation. Recent findings indicate that the activated platelets are crucial regulators of tumor vascular homeostasis in that they prevent tumor hemorrhage. Surprisingly, this effect is independent of platelets' capacity to form thrombi and instead relies on the secretion of their granule content. Thus, targeting platelet secretory activities may represent a new approach to specifically destabilize tumor vasculature.
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Affiliation(s)
- Benoit Ho-Tin-Noé
- Immune Disease Institute and Department of Pathology, Harvard Medical School, Boston, Massachusetts, USA
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22
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Koehl GE, Gaumann A, Geissler EK. Intravital microscopy of tumor angiogenesis and regression in the dorsal skin fold chamber: mechanistic insights and preclinical testing of therapeutic strategies. Clin Exp Metastasis 2009; 26:329-44. [PMID: 19190882 DOI: 10.1007/s10585-008-9234-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2008] [Accepted: 12/18/2008] [Indexed: 01/03/2023]
Abstract
Tumor angiogenesis is a major step in tumor progression to clinically symptomatic cancer and thus a potential target for cancer therapy. It is essential to understand the fundamental mechanisms of the angiogenic processes to provide a rational for testing inhibitory strategies for cancer treatment. The dorsal skin fold chamber provides a suitable (chronic) model for intravital microscopy to monitor the same tumor in time-lapse imaging series and in real-time functional analysis e.g., of blood flow. Adaptation of this model to several rodent species and tumor types has led to numerous physical and drug based therapy options. With modification of implantation techniques, motility and invasion of individual cells can be visualized, in addition to angiogenesis and microcirculation. Modern fluorescent techniques such as ex vivo labelling of specific cell populations and the introduction of stably fluorescent protein expressing cell lines further enhance the suitability of this technique. In addition, laser scanning and multiphoton microscopy in combination with genetically altered mouse strains and cell lines are making the DCSF even more attractive for mechanistic and interventional studies in cancer research. Here we review the preparation as well as the applications of the DCSF in tumor angiogenesis.
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Affiliation(s)
- Gudrun E Koehl
- Department of Surgery, University of Regensburg, Franz-Josef-Strauss Allee 11, Regensburg, Germany.
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23
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MR Characterization of Mild Hyperthermia-Induced Gadodiamide Release From Thermosensitive Liposomes in Solid Tumors. Invest Radiol 2008; 43:877-92. [DOI: 10.1097/rli.0b013e31818768cd] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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24
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Ho-Tin-Noé B, Goerge T, Cifuni SM, Duerschmied D, Wagner DD. Platelet granule secretion continuously prevents intratumor hemorrhage. Cancer Res 2008; 68:6851-8. [PMID: 18701510 DOI: 10.1158/0008-5472.can-08-0718] [Citation(s) in RCA: 165] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cancer is associated with a prothrombogenic state capable of platelet activation. Platelets, on the other hand, can support angiogenesis, a process involved in the progression of tumor growth and metastasis. However, it is unclear whether platelet/tumor interactions substantially contribute to tumor physiology. We investigated whether platelets stabilize tumor vessels and studied the underlying mechanisms. We induced severe acute thrombocytopenia in mice bearing s.c. Lewis lung carcinoma or B16F10 melanoma. Intravital microscopy revealed that platelet depletion led to a rapid destabilization of tumor vessels with intratumor hemorrhage starting as soon as 30 min after induction of thrombocytopenia. Using an inhibitor of glycoprotein Ibalpha (GPIbalpha) and genetically engineered mice with platelet adhesion defects, we investigated the role of platelet adhesion receptors in stabilizing tumor vessels. We found that a single defect in either GPIbalpha, von Willebrand factor, P-selectin, or platelet integrin activation did not lead to intratumor hemorrhage. We then compared the ability of transfused resting and degranulated platelets to prevent intratumor hemorrhage. Whereas resting platelets prevented thrombocytopenia-induced tumor bleeding, circulating degranulated platelets did not. This suggests that the prevention of intratumor hemorrhage by platelets relies on the secretion of the content of platelet granules. Supporting this hypothesis, we further found that thrombocytopenia dramatically impairs the balance between propermeability and antipermeability factors in tumor-bearing animals, in particular depleting blood of angiopoietin-1 and serotonin. Our results show a crucial contribution of platelets to tumor homeostasis through continuous prevention of severe intratumor hemorrhage and consequent cell death. The study also suggests platelet function as a reasonable target for specific destabilization of tumor vessels.
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Affiliation(s)
- Benoit Ho-Tin-Noé
- Immune Disease Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
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25
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Nolte I, Przibylla H, Bostel T, Groden C, Brockmann MA. Tumor–platelet interactions: Glioblastoma growth is accompanied by increasing platelet counts. Clin Neurol Neurosurg 2008; 110:339-42. [DOI: 10.1016/j.clineuro.2007.12.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Revised: 12/04/2007] [Accepted: 12/04/2007] [Indexed: 11/27/2022]
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26
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Lindner LH, Hossann M, Vogeser M, Teichert N, Wachholz K, Eibl H, Hiddemann W, Issels RD. Dual role of hexadecylphosphocholine (miltefosine) in thermosensitive liposomes: Active ingredient and mediator of drug release. J Control Release 2008; 125:112-20. [DOI: 10.1016/j.jconrel.2007.10.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Revised: 10/07/2007] [Accepted: 10/15/2007] [Indexed: 11/28/2022]
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27
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Schmitt-Sody M, Metz P, Gottschalk O, Birkenmaier C, Zysk S, Veihelmann A, Jansson V. Platelet P-selectin is significantly involved in leukocyte-endothelial cell interaction in murine antigen-induced arthritis. Platelets 2007; 18:365-72. [PMID: 17654306 DOI: 10.1080/09537100701191315] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
There is growing evidence that platelets play an important role in the development and maintenance of rheumatoid arthritis. Activation and adherence of platelets in the synovial microcirculation might be in part responsible for endothelial damage and activation of leukocytes. Recent findings show a direct influence of P-selectin on platelet- and leukocyte-endothelial cell interaction in mice with Antigen-induced Arthritis (AiA). P-selectin is only expressed by platelets and endothelial cells, not by leukocytes. Therefore, the aim of the present study was to investigate the differential influence of platelet and endothelial P-selectin on the extent of inflammation in AiA. AiA was induced in wild-type mice and in P-selectin-deficient mice from the same genetic background (four groups: each n = 7). Intravital fluorescence microscopy (IVM) was used to visualize platelets and leukocytes in the synovial microcirculation at day 8 after AiA. Platelets from either strain were fluorescence-labelled ex vivo and transferred into either strain. We were able to demonstrate a significant decrease of platelet- and leukocyte-endothelial cell interaction in P-selectin-deficient mice with AiA in comparison to wild-type mice with AiA. When wild-type platelets were donated into P-selectin-deficient AiA recipients, the leukocyte-endothelial cell interaction was significantly increased compared to the group consisting of P-selectin-deficient recipient and donor mice. These are the first in vivo results showing that the P-selectin stored in platelets is at least partly responsible for the leukocyte-endothelial cell interaction and the resulting tissue damage in AiA. In the future, a suppression of platelet P-selectin could potentially become a treatment option for reducing the effects of rheumatoid arthritis.
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MESH Headings
- Animals
- Antigens/toxicity
- Arthritis, Experimental/chemically induced
- Arthritis, Experimental/genetics
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- Arthritis, Experimental/therapy
- Arthritis, Rheumatoid/chemically induced
- Arthritis, Rheumatoid/genetics
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/pathology
- Arthritis, Rheumatoid/therapy
- Blood Platelets/immunology
- Blood Platelets/pathology
- Cell Adhesion/immunology
- Cell Communication/genetics
- Cell Communication/immunology
- Endothelial Cells/immunology
- Endothelial Cells/pathology
- Female
- Leukocytes/immunology
- Leukocytes/pathology
- Mice
- Mice, Knockout
- P-Selectin/genetics
- P-Selectin/immunology
- Platelet Adhesiveness/genetics
- Platelet Adhesiveness/immunology
- Platelet Transfusion
- Synovial Membrane/immunology
- Synovial Membrane/pathology
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Affiliation(s)
- M Schmitt-Sody
- Department of Orthopaedics, Ludwig Maximilians University, Munich, Germany.
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28
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Strieth S, Nussbaum CF, Eichhorn ME, Fuhrmann M, Teifel M, Michaelis U, Berghaus A, Dellian M. Tumor-selective vessel occlusions by platelets after vascular targeting chemotherapy using paclitaxel encapsulated in cationic liposomes. Int J Cancer 2007; 122:452-60. [DOI: 10.1002/ijc.23088] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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29
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Cloonan ME, DiNapoli M, Mousa SA. Efficacy of anticoagulants and platelet inhibitors in cancer-induced thrombosis. Blood Coagul Fibrinolysis 2007; 18:341-5. [PMID: 17473575 DOI: 10.1097/mbc.0b013e3280d9e9b2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The efficacy of anticoagulants, low-molecular-weight heparins (LMWHs), the antiplatelet glycoprotein IIb/IIIa antagonist, or combinations on cancer-activated thrombosis was determined using thromboelastography. The LMWHs tinzaparin and enoxaparin (0.179, 1.79, 17.9 microg) were incubated in human citrated whole blood (n = 4) and then activated by calcium chloride (11 mmol/l) or Colo205 (cell count 10). Concentrations of 9.9, 17.9 and 179 microg glycoprotein IIb/IIIa antagonist, XV454, and combinations with each LMWH were carried out and activated under the same conditions. The experiment was repeated with tissue factor substituting for the Colo205 to induce platelet/fibrin clot formation. Parameters tested in the thrombelastography analysis included clotting time, rate of clot formation due to fibrin formation, clot kinetics, and clot strength related to platelet count (maximum amplitude). Tinzaparin (1.79 microg), enoxaparin (1.79 microg), and XV454 (17.9 microg) significantly reduced the angle by 64, 26 and 27%, respectively, in cancer-induced clotting. Significant reductions in the maximum amplitude occurred in tinzaparin 1.79 microg (31%), enoxaparin 1.79 microg (11%), and XV454 17.9 microg (59%). An overall antithrombotic additive effect occurred when each LMWH (1.79 microg) was combined with XV454 (17.9 microg). The results between cancer-activated and tissue factor-activated blood were similar. The study concludes that an additive effect is present between LMWHs and a glycoprotein IIb/IIIa antagonist in reducing cancer-mediated thrombosis.
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Affiliation(s)
- Melissa E Cloonan
- Pharmaceutical Research Institute at Albany College of Pharmacy, 106 New Scotland Avenue, Albany, NY 12208, USA
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30
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Brockmann MA, Giese A, Mueller K, Kaba FJ, Lohr F, Weiss C, Gottschalk S, Nolte I, Leppert J, Tuettenberg J, Groden C. Preoperative thrombocytosis predicts poor survival in patients with glioblastoma. Neuro Oncol 2007; 9:335-42. [PMID: 17504931 PMCID: PMC1907417 DOI: 10.1215/15228517-2007-013] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Thrombocytosis, which is defined as a platelet count greater than 400 platelets/nl, has been found to be an independent predictor of shorter survival in various tumors. Release of growth factors from tumors has been proposed to increase platelet counts. Preoperative platelet counts and other clinical and hematological parameters were reviewed from the records of 153 patients diagnosed between 1999 and 2004 with histologically confirmed glioblastoma in order to evaluate the prognostic significance of preoperative thrombocytosis in these patients. The relationship between thrombocytosis and survival was initially analyzed in all patients regardless of further therapy. Univariate log-rank tests showed that the median survival time of 29 patients with preoperative thrombocytosis (19%) was significantly shorter (4 months; 95% confidence interval [95% CI], 3-6 months) compared to 124 patients with normal platelet counts (11 months; 95% CI, 8-13 months; p = 0.0006). Multivariate analysis (Cox proportional hazards model) confirmed preoperative platelet count, age, prothrombin time, and activated partial thromboplastin time to be prognostic factors of survival (all p < 0.05). In a subset of patients (only operated patients with radiation therapy with or without additional chemotherapy), survival was likewise significantly shorter when preoperative thrombocytosis was diagnosed (6 months; 95% CI, 4-12 months) compared to patients with normal platelet count (13 months; 95% CI, 11-15 months; p = 0.0359). In multivariate analysis, age, platelet count, preoperative prothrombin time, and degree of tumor resection retained significance as prognostic factors of survival (all p < 0.05). The results of our study demonstrate preoperative thrombocytosis to be a prognostic factor associated with shorter survival time in patients with glioblastoma.
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Affiliation(s)
- Marc A Brockmann
- University Hospital Mannheim, Department of Neuroradiology, Theodor-Kutzer-ufer 1-3, 68167 Mannheim, Germany.
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31
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Fuster MM, Wang L, Castagnola J, Sikora L, Reddi K, Lee PHA, Radek KA, Schuksz M, Bishop JR, Gallo RL, Sriramarao P, Esko JD. Genetic alteration of endothelial heparan sulfate selectively inhibits tumor angiogenesis. J Cell Biol 2007; 177:539-49. [PMID: 17470635 PMCID: PMC2064806 DOI: 10.1083/jcb.200610086] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 03/26/2007] [Indexed: 11/24/2022] Open
Abstract
To examine the role of endothelial heparan sulfate during angiogenesis, we generated mice bearing an endothelial-targeted deletion in the biosynthetic enzyme N-acetylglucosamine N-deacetylase/N-sulfotransferase 1 (Ndst1). Physiological angiogenesis during cutaneous wound repair was unaffected, as was growth and reproductive capacity of the mice. In contrast, pathological angiogenesis in experimental tumors was altered, resulting in smaller tumors and reduced microvascular density and branching. To simulate the angiogenic environment of the tumor, endothelial cells were isolated and propagated in vitro with proangiogenic growth factors. Binding of FGF-2 and VEGF(164) to cells and to purified heparan sulfate was dramatically reduced. Mutant endothelial cells also exhibited altered sprouting responses to FGF-2 and VEGF(164), reduced Erk phosphorylation, and an increase in apoptosis in branching assays. Corresponding changes in growth factor binding to tumor endothelium and apoptosis were also observed in vivo. These findings demonstrate a cell-autonomous effect of heparan sulfate on endothelial cell growth in the context of tumor angiogenesis.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Apoptosis/genetics
- Cell Line, Tumor
- Endothelium, Vascular/enzymology
- Endothelium, Vascular/pathology
- Extracellular Signal-Regulated MAP Kinases/metabolism
- Fibroblast Growth Factor 2/pharmacology
- Heparitin Sulfate/metabolism
- Mice
- Mice, Mutant Strains
- Neoplasm Proteins/deficiency
- Neoplasm Proteins/metabolism
- Neoplasms, Experimental/enzymology
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/pathology
- Neovascularization, Pathologic/enzymology
- Neovascularization, Pathologic/genetics
- Neovascularization, Pathologic/pathology
- Organ Specificity/genetics
- Phosphorylation/drug effects
- Sulfotransferases/deficiency
- Sulfotransferases/metabolism
- Vascular Endothelial Growth Factor A/pharmacology
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Affiliation(s)
- Mark M Fuster
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, University of California San Diego, La Jolla, CA 92093, USA
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Waldner M, Hutter J, Uhl E, Baethmann A, Lehmberg J. Modified labeling technique for in vivo visualization of platelets in the cerebral microcirculation of Mongolian gerbils. J Cereb Blood Flow Metab 2007; 27:327-33. [PMID: 16736042 DOI: 10.1038/sj.jcbfm.9600341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Activation of platelets induces interactions with platelets, endothelial cells, and leukocytes. In vivo observation of these interactions in the cerebral microcirculation is rare. The purpose of the present study was to develop a model enabling the in vivo observation of platelet kinetics in the cerebral microcirculation. Intravital fluorescence microscopy was performed in the Mongolian gerbil. Platelets of a donor were labeled ex vivo with carboxyfluorescein diacetat-succinimidylester (CFDA-SE), providing long-term fluorescence. Platelet function was tested ex vivo by flow cytometric analysis and in vivo by analyzing platelet-endothelium interactions. Labeled platelets stimulated with adenosine diphosphate ADP (200 micromol/L) or thrombin (1000 U/L) showed aggregation in flow cytrometric analysis, whereas unstimulated platelets were not aggregated. Irradiation of the brain surface after intravenous injection of the photosensitizing dye Photosan first induced rolling and firm adherence of platelets on arteriolar and venular endothelium, followed by the formation of a thrombus obstructing the vessel. Quantitative analysis (n x 100 microm(-1) min(-1)) before and after 6 mins of irradiation showed 2.6+/-3.2 versus 29.0+/-28.9 rolling, and 0.0+/-0.0 versus 1.7+/-2.3 firm adherent platelets in arterioles, and 3.9+/-3.3 versus 36.6+/-20.9 rolling and 0.0+/-0.0 versus 13.6+/-8.9 firm adherent platelets in venules. Thus, we conclude that ex vivo labeling of platelets with CFDA-SE does not activate platelets. Platelet aggregation and adhesion was achieved by platelet-specific stimulation such as ADP, thrombin or irradiation. In vivo assessment of physiologic and pathophysiologic mechanisms of platelets in the cerebral microcirculation can be achieved in this model.
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Affiliation(s)
- Maximilian Waldner
- Institute for Surgical Research, Ludwig-Maximilians-University, Munich, Germany
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Fischer TH, Bode AP, Parker BR, Russell KE, Bender DE, Ramer JK, Read MS. Primary and secondary hemostatic functionalities of rehydrated, lyophilized platelets. Transfusion 2006; 46:1943-50. [PMID: 17076850 DOI: 10.1111/j.1537-2995.2006.01002.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The rehydrated, lyophilized (RL) platelet (PLT) is being developed as a hemostatic infusion agent for the control of active bleeding. The key to the method for preparing RL PLTs is a mild aldehyde stabilization that allows for freezing and lyophilizing without cellular rupture. RL PLTs have been shown to be effective at rapidly controlling bleeding in animal models of cardiopulmonary bypass induced PLT dysfunction and washout thrombocytopenia, yet the rehydrated cells have proved to be safe with respect to induction of pathologic intravascular coagulation. STUDY DESIGN AND METHODS In vitro and in vivo studies were performed to better understand the differential effect of the RL PLT manufacturing method on primary and secondary hemostatic processes. The functionality of the von Willebrand factor (VWF) receptor (glycoprotein Ib) complex, the PAR receptors, integrin-mediated aggregation (inside-out signaling), and surface membrane prothrombin to thrombin conversion systems were investigated. RESULTS RL PLTs were found to retain native VWF-mediated adhesion and surface thrombin generation functions. In contrast, the coupling of thrombin receptors to integrin inside-out signaling was largely inhibited. CONCLUSION These results suggest that RL PLTs may stop bleeding by forming primary hemostatic plugs and providing a localized source of thrombin for secondary hemostatic processes, yet do not build up occlusive pathologic clots possibly because integrin functions for forming PLT-PLT aggregates are partially inhibited.
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Affiliation(s)
- Thomas H Fischer
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516, USA.
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Abstract
Many cancer patients have a reportedly hypercoagulable state, with recurrent thrombosis due to the impact of cancer cells and chemotherapy or radiotherapy on the coagulation cascade. Studies have demonstrated that unfractionated heparin or its low-molecular-weight fractions interfere with various processes involved in tumor growth and metastasis. These include fibrin formation; binding of heparin to angiogenic growth factors, such as basic fibroblast growth factor and vascular endothelial growth factor; modulation of tissue factor; and perhaps other more important modulatory mechanisms, such as enhanced tissue factor pathway inhibitor (TFPI) release and inhibition of various matrix-degrading enzymes. Clinical trials have suggested a clinically relevant effect of low-molecular-weight heparin (LMWH), as compared with unfractionated heparin, on the survival of cancer patients with deep vein thrombosis. Similarly, the impact of warfarin on the survival of cancer patients with thromboembolic disorders was demonstrated. Studies from the author's laboratory demonstrated a significant role for LMWH, warfarin, anti-VIIa, and LMWH-releasable TFPI on the regulation of angiogenesis, tumor growth and tumor metastasis. Thus, modulation of tissue factor/VIIa noncoagulant activities by LMWH, warfarin, anti-VIIa, or TFPI may be a useful therapeutic method for the inhibition of angiogenesis associated with human tumor growth and metastasis. Additionally, antiplatelet drugs may have an impact on tumor metastasis, and the combination of antiplatelets and anticoagulants at adjusted doses may provide greater benefits to cancer patients.
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Affiliation(s)
- Shaker A Mousa
- Pharmaceutical Research Institute (PRI), Albany College of Pharmacy, 106 New Scotland Avenue, Albany, NY 12208-3492, USA.
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Steinstraesser L, Ring A, Bals R, Steinau HU, Langer S. The Human Host Defense Peptide LL37/hCAP Accelerates Angiogenesis in PEGT/PBT Biopolymers. Ann Plast Surg 2006; 56:93-8. [PMID: 16374104 DOI: 10.1097/01.sap.0000190883.30005.91] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Antimicrobial peptides are effector molecules of the innate immune response and contribute to host defense and inflammation. This study was designed to evaluate neovascularization in biopolymers after instillation with LL37 of angiogenesis in the dorsal skinfold chamber in mice. MATERIAL AND METHODS The host defense peptide human cathelicicin LL37 was tested for in vitro antimicrobial activity in a bilayer radial diffusion assay. For in vivo testing, 4 different concentrations of LL37 or carrier control were instilled into a biopolymer, then inserted into the dorsal skinfold chamber in Balb/c mice. Standard microcirculatory parameters were assessed over 24 days' follow-up. RESULTS LL37 showed broad-spectrum antimicrobial activity against gram-positive and -negative bacteria. The LL37 treatment of the biopolymer accelerated the onset of neovascularization by 6 days compared with the carrier control (P < 0.01). CONCLUSION This study demonstrated that LL37 has antimicrobial activity and is important for early support of neoangiogenesis in biopolymers. The multifunctional human host defense peptide LL37 has potential as an adjunct for tissue engineering.
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Affiliation(s)
- Lars Steinstraesser
- Department of Plastic and Hand Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany.
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Guba M, Yezhelyev M, Eichhorn ME, Schmid G, Ischenko I, Papyan A, Graeb C, Seeliger H, Geissler EK, Jauch KW, Bruns CJ. Rapamycin induces tumor-specific thrombosis via tissue factor in the presence of VEGF. Blood 2005; 105:4463-9. [PMID: 15671443 DOI: 10.1182/blood-2004-09-3540] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Therapeutic strategies that target and disrupt the already-formed vessel networks of growing tumors are actively pursued. The goal of these approaches is to induce a rapid shutdown of the vascular function of the tumor so that blood flow is arrested and tumor cell death occurs. Here we show that the mammalian target of rapamycin (mTOR) inhibitor rapamycin, when administered to tumor-bearing mice, selectively induced extensive local microthrombosis of the tumor microvasculature. Importantly, rapamycin administration had no detectable effect on the peritumoral or normal tissue. Intravital microscopy analysis of tumors implanted into skinfold chambers revealed that rapamycin led to a specific shutdown of initially patent tumor vessels. In human umbilical vein endothelial cells vascular endothelial growth factor (VEGF)–induced tissue factor expression was strongly enhanced by rapamycin. We further show by Western blot analysis that rapamycin interferes with a negative feedback mechanism controlling this pathologic VEGF-mediated tissue factor expression. This thrombogenic alteration of the endothelial cells was confirmed in a one-step coagulation assay. The circumstance that VEGF is up-regulated in most tumors may explain the remarkable selectivity of tumor vessel thrombosis under rapamycin therapy. Taken together, these data suggest that rapamycin, besides its known antiangiogenic properties, has a strong tumor-specific, antivascular effect in tumors.
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Affiliation(s)
- Markus Guba
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, Munich, Germany. markus.guba@.med.uni-muenchen.de
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37
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Schmitt-Sody M, Klose A, Gottschalk O, Metz P, Gebhard H, Zysk S, Eichhorn ME, Hernandez-Richter TM, Jansson V, Veihelmann A. Platelet–endothelial cell interactions in murine antigen-induced arthritis. Rheumatology (Oxford) 2005; 44:885-9. [PMID: 15827038 DOI: 10.1093/rheumatology/keh638] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Growing evidence supports the substantial pathophysiological impact of platelets on the development of rheumatoid arthritis. At present there are no methods for studying these cellular mechanisms in vivo. The aim of this study was to visualize and investigate platelet-endothelial cell interaction in the knee joint of mice with antigen-induced arthritis (AiA) by means of intravital microscopy. METHODS In 14 mice (Balbc) intravital microscopic assessment was performed on day 8 after AiA induction in two groups (controls, AiA). The severity of AiA was assessed by measuring knee joint swelling and by histological scoring. Ex vivo fluorescently labelled rolling and adherent platelets and leucocyte-endothelium interactions were investigated by intravital fluorescence microscopy. RESULTS Swelling of the knee joint as well as histological score was significantly enhanced in arthritic animals compared with controls. In control mice intravital microscopy revealed low baseline rolling and sticking of leucocytes and fluorescently labelled platelets. AiA induced a significant increase in the fraction of rolling leucocytes (3 times) and rolling platelets (6 times) compared to the control group. Furthermore, AiA induction resulted in a significantly enhanced number of adherent leucocytes (3-fold) and adherent platelets (12-fold) in comparison with control animals. CONCLUSIONS Platelet kinetics were directly analysed using intravital microscopy in the arthritic microcirculation in vivo for the first time. We provide the first evidence that platelets accumulate in arthritic vessels, indicating platelet activation due to AiA. Platelet recruitment and subsequent activation might play an important role in the pathogenesis of rheumatoid arthritis.
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Affiliation(s)
- M Schmitt-Sody
- Department of Orthopedics, Klinikum Grosshadern, Marchioninistr. 15, Ludwig-Maximilians-University, 81377 Munich, Germany.
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Brown KM, Domin C, Aranha GV, Yong S, Shoup M. Increased preoperative platelet count is associated with decreased survival after resection for adenocarcinoma of the pancreas. Am J Surg 2005; 189:278-82. [PMID: 15792750 DOI: 10.1016/j.amjsurg.2004.11.014] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2004] [Revised: 11/19/2004] [Accepted: 11/19/2004] [Indexed: 12/21/2022]
Abstract
BACKGROUND Platelets are thought to participate in tumor metastasis. However, the relationship between platelet count and prognosis in pancreatic cancer remains unresolved. METHODS A chart review of patients undergoing resection for pancreatic adenocarcinoma was undertaken. Demographic, perioperative, and outcome data were collected. Kaplan-Meier survival and Cox regression analyses were used to determine the impact of preoperative platelet count on survival. RESULTS Between June 1995 and March 2003, 109 patients (63% male) with a median age of 68 years (range 42 to 85 years) underwent resection for pancreatic cancer. Univariate analysis demonstrated that platelet count, lymph node or margin status, and histology were associated with survival. In multivariate analysis, the association between increased platelet count and poor survival maintained significance. CONCLUSIONS Increased preoperative platelet count is associated with adverse survival outcome in patients undergoing resection for pancreatic cancer. Antiplatelet medications warrant further study in an attempt to improve survival in these patients.
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Affiliation(s)
- Kimberly M Brown
- Department of Surgery, Section of Surgical Oncology, Loyola University Medical Center, 2160 South First Ave., 3rd Floor, Bldg. 110, Maywood, IL 60153, USA
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Arakelyan L, Merbl Y, Agur Z. Vessel maturation effects on tumour growth: validation of a computer model in implanted human ovarian carcinoma spheroids. Eur J Cancer 2005; 41:159-67. [PMID: 15618001 DOI: 10.1016/j.ejca.2004.09.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2004] [Revised: 08/05/2004] [Accepted: 09/07/2004] [Indexed: 10/26/2022]
Abstract
We analysed measurements of tumour growth, neovascular maturation and function in human epithelial ovarian carcinoma xenografts, studied noninvasively by magnetic resonance imaging. Results suggest that vascular maturation and mature and immature vessel regression occur continuously during tumour neovascularisation. Moreover, in these spheroids, a high tumour growth-rate is associated with monotonic changes in vessel density (VD) and with large proportions of mature blood vessels, whereas a lower tumour growth-rate is associated with fluctuating VD and lower proportions of mature vessels. These results corroborate a mathematical model for tumour dynamics, including vascular maturation and immature and mature vessel regression. The model predicts that rapid tumour growth may result from a high maturation-rate of neo-vasculatures, due to substantial mature VD in the microenvironment, while a slower tumour growth is an outcome of a lower background VD, leading to a lower vessel maturation-rate, larger proportion of immature vessels and, consequently, to regression-driven instabilities. The generality of these results for other tumour types should be validated.
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Affiliation(s)
- L Arakelyan
- Institute for Medical BioMathematics (IMBM), 10 Ha'Teena St., P.O. Box 282, Bene Ataroth, 60991, Israel
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Jurasz P, Alonso-Escolano D, Radomski MW. Platelet--cancer interactions: mechanisms and pharmacology of tumour cell-induced platelet aggregation. Br J Pharmacol 2004; 143:819-26. [PMID: 15492016 PMCID: PMC1575943 DOI: 10.1038/sj.bjp.0706013] [Citation(s) in RCA: 239] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2004] [Revised: 09/08/2004] [Accepted: 09/10/2004] [Indexed: 11/09/2022] Open
Abstract
During haematogenous metastasis, cancer cells migrate to the vasculature and interact with platelets resulting in tumour cell-induced platelet aggregation (TCIPA). We review: 1. The biological and clinical significance of TCIPA; 2. Molecular mechanisms involved in platelet aggregation by cancer cells; 3. Strategies for pharmacological regulation of these interactions. We conclude that pharmacological regulation of platelet-cancer cell interactions may reduce the impact of TCIPA on cancer biology.
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Affiliation(s)
- Paul Jurasz
- Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas-Houston, U.S.A
- Department of Integrative Biology and Pharmacology, University of Texas-Houston, U.S.A
| | - David Alonso-Escolano
- Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas-Houston, U.S.A
- Department of Integrative Biology and Pharmacology, University of Texas-Houston, U.S.A
| | - Marek W Radomski
- Institute of Molecular Medicine for the Prevention of Human Diseases, University of Texas-Houston, U.S.A
- Department of Integrative Biology and Pharmacology, University of Texas-Houston, U.S.A
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Aggio FB, Cariello AJ, Almeida MSS, Rodrigues CA, De Moraes NSB, Colleoni GWB, Farah ME. Bilateral Central Retinal Vein Occlusion Associated with Multiple Myeloma. Ophthalmologica 2004; 218:283-7. [PMID: 15258420 DOI: 10.1159/000078622] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2003] [Accepted: 12/04/2003] [Indexed: 11/19/2022]
Abstract
PURPOSE To report a case of simultaneous bilateral central retinal vein occlusion (CRVO) associated with multiple myeloma. METHODS A 65-year-old woman had sudden, painless loss of vision in both eyes for 20 days. Ophthalmologic examination revealed bilateral CRVO. Appropriate medical workup was conducted, and multiple myeloma was diagnosed as the underlying cause. RESULTS Clinical support and chemotherapy effectively controlled paraprotein production, leading to improvement of both systemic and ocular alterations. CONCLUSIONS Many conditions have been noted to be associated with CRVO. Based on a Medline search, this is the first report of simultaneous bilateral CRVO as the first manifestation of multiple myeloma, illustrating the need for a primary care ophthalmologist to be involved in the basic assessment for associated underlying diseases in retinal disorders.
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Affiliation(s)
- Fabio B Aggio
- Department of Ophthalmology, Instituto da Visão - IPEPO, São Paulo, Brazil.
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Abstract
Platelets are small in size and simple in structure. Nevertheless, these anucleate cytoplasts utilize complex molecular systems to regulate a variety of biological functions. Here we review evolutionary paths, traditional roles, and previously unrecognized biological capacities of platelets that interface thrombosis with inflammation and potentially identify new roles in inflammatory diseases.
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Affiliation(s)
- A S Weyrich
- Department of Internal Medicine and the Eccles Institute of Human Genetics, University of Utah, Salt Lake City, Utah 84112, USA.
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