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Martyanov AA, Morozova DS, Sorokina MA, Filkova AA, Fedorova DV, Uzueva SS, Suntsova EV, Novichkova GA, Zharkov PA, Panteleev MA, Sveshnikova AN. Heterogeneity of Integrin α IIbβ 3 Function in Pediatric Immune Thrombocytopenia Revealed by Continuous Flow Cytometry Analysis. Int J Mol Sci 2020; 21:ijms21093035. [PMID: 32344835 PMCID: PMC7246588 DOI: 10.3390/ijms21093035] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 03/10/2020] [Revised: 04/06/2020] [Accepted: 04/22/2020] [Indexed: 02/07/2023] Open
Abstract
Immune thrombocytopenia (ITP) is an autoimmune condition primarily induced by the loss of immune tolerance to the platelet glycoproteins. Here we develop a novel flow cytometry approach to analyze integrin αIIbβ3 functioning in ITP in comparison with Glanzmann thrombasthenia (GT) (negative control) and healthy pediatric donors (positive control). Continuous flow cytometry of Fura-Red-loaded platelets from whole hirudinated blood was used for the characterization of platelet responses to conventional activators. Calcium levels and fibrinogen binding were normalized to ionomycin-induced responses. Ex vivo thrombus formation on collagen was observed in parallel-plate flow chambers. Platelets from all ITP patients had significantly higher cytosolic calcium concentration in the quiescent state compared to healthy donors (15 ± 5 nM vs. 8 ± 5 nM), but calcium increases in response to all activators were normal. Clustering analysis revealed two subpopulations of ITP patients: the subgroup with high fibrinogen binding (HFB), and the subgroup with low fibrinogen binding (LFB) (8% ± 5% for LFB vs. 16% ± 3% for healthy donors in response to ADP). GT platelets had calcium mobilization (81 ± 23 nM), fibrinogen binding (5.1% ± 0.3%) and thrombus growth comparable to the LFB subgroup. Computational modeling suggested phospholipase C-dependent platelet pre-activation for the HFB subgroup and lower levels of functional integrin molecules for the LFB group.
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Affiliation(s)
- Alexey A. Martyanov
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
- Center for Theoretical Problems of Physico-Chemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., Moscow 109029, Russia
- Institute for Biochemical Physics (IBCP), Russian Academy of Sciences (RAS), Russian Federation, Moscow, Kosyigina 4 119334, Russia
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, Moscow 119991, Russia
| | - Daria S. Morozova
- Faculty of Basic Medicine, Lomonosov Moscow State University, 27/1 Lomonosovsky av., Moscow 119991, Russia
| | - Maria A. Sorokina
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Aleksandra A. Filkova
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
- Center for Theoretical Problems of Physico-Chemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., Moscow 109029, Russia
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, Moscow 119991, Russia
| | - Daria V. Fedorova
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Selima S. Uzueva
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Elena V. Suntsova
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Galina A. Novichkova
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Pavel A. Zharkov
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
| | - Mikhail A. Panteleev
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
- Center for Theoretical Problems of Physico-Chemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., Moscow 109029, Russia
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, Moscow 119991, Russia
- Faculty of Biological and Medical Physics, Moscow Institute of Physics and Technology, 9 Institutskii per., Dolgoprudnyi 141700, Russia
| | - Anastasia N. Sveshnikova
- National Medical Research Center of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, Moscow 117198, Russia
- Center for Theoretical Problems of Physico-Chemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., Moscow 109029, Russia
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, Moscow 119991, Russia
- Department of Normal Physiology, Sechenov First Moscow State Medical University, 8/2 Trubetskaya St., Moscow 119991, Russia
- Correspondence:
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