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Abstract
High-altitude polycythemia (HAPC) can occur in individuals who are intolerant to high-altitude hypoxia. In patients with HAPC, erythrocytosis is often accompanied by a decrease in platelet count. Chronic hypoxia can increase the incidence of arteriovenous thrombosis and the risk of bleeding during antithrombotic treatment due to thrombocytopenia; therefore, understanding the cause of thrombocytopenia can reduce the risk of treatment-related bleeding. In this study, we examined platelet production and apoptosis to understand the cause of thrombocytopenia in patients with HAPC. The classification of myeloid-derived megakaryocytes (MKs) in HAPC patients was mainly granular MKs rather than mature MKs, suggesting impaired differentiation and maturation. However, the total number of MKs and newly generated reticulated platelets in the peripheral blood increased, indicating sufficient platelet generation in HAPC thrombocytopenia. Increased platelet apoptosis may be one of the causes of thrombocytopenia. Platelet activation and GP1bα pathway activation induced by thrombin and von Willebrand factor can lead to platelet apoptosis. Platelet production was not reduced in patients with HAPC, whereas platelet apoptosis was associated with thrombocytopenia. These findings provide a rationale for considering the bleeding risk in HAPC patient while treating thrombotic diseases.
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Affiliation(s)
- Zhuoya Wang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of Qinghai University, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, China.,Gerontology Department, Qinghai University Affiliated Hospital, Xining, China
| | - Noryung Tenzing
- Gerontology Department, Qinghai University Affiliated Hospital, Xining, China
| | - Qiying Xu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of Qinghai University, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, China.,Gerontology Department, Qinghai University Affiliated Hospital, Xining, China
| | - Huifang Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of Qinghai University, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, China.,Gerontology Department, Qinghai University Affiliated Hospital, Xining, China
| | - Yi Ye
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of Qinghai University, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, China
| | - Yi Wen
- Department of General Surgery & Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command (Chengdu Military General Hospital), Chengdu, China
| | - Tana Wuren
- Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of Qinghai University, Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, China
| | - Sen Cui
- Gerontology Department, Qinghai University Affiliated Hospital, Xining, China
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Lim S, Murphy S, Murphy S, Coughlan T, O'Neill D, Tierney S, Egan B, Collins D, McCarthy A, Lim SY, Smith D, Cox D, McCabe D. Assessment of on-treatment platelet reactivity at high and low shear stress and platelet activation status after the addition of dipyridamole to aspirin in the early and late phases after TIA and ischaemic stroke. J Neurol Sci 2022; 441:120334. [DOI: 10.1016/j.jns.2022.120334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 05/30/2022] [Accepted: 06/30/2022] [Indexed: 11/24/2022]
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Molnar T, Csecsei P. Prevention of Non-Cardiogenic Ischemic Stroke: Towards Personalized Stroke Care. In: Dehkharghani S, editor. Stroke. Exon Publications; 2021. pp. 133-48. [DOI: 10.36255/exonpublications.stroke.personalizedcare.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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