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[Platelet GPⅠb-Ⅸ-Ⅴ receptor-mediated mechanism and its application in thrombotic diseases]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2019; 40:532-536. [PMID: 31340631 PMCID: PMC7342399 DOI: 10.3760/cma.j.issn.0253-2727.2019.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Shang D, Zhang Z, Wang Q, Ran Y, Shaw TS, Van JN, Peng Y. Membrane skeleton orchestrates the platelet glycoprotein (GP) Ib-IX complex clustering and signaling. IUBMB Life 2016; 68:823-9. [PMID: 27634617 PMCID: PMC5132009 DOI: 10.1002/iub.1559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/03/2016] [Indexed: 11/10/2022]
Abstract
Platelet glycoprotein Ib‐IX complex is affixed to the membrane skeleton through interaction with actin binding protein 280 (ABP‐280). We find that removal of the ABP‐280 binding sites in GP Ibα cytoplasmic tail has little impact on the complex clustering induced by antibody crosslinking. However, large truncation of the GP Ibα cytoplasmic tail allows the formation of larger patches of the complex, suggesting that an ABP‐280 independent force may exist. Besides, we observe that the signaling upon GP Ib‐IX clustering is elicited in both membrane lipid domain dependent and independent manner, a choice that relies on how the membrane skeleton interacts with the complex. Our findings suggest a more complex mechanism for how the membrane skeleton regulates the GP Ib‐IX function. © 2016 The Authors IUBMB Life published by Wiley Periodicals, Inc. on behalf of International Union of Biochemistry and Molecular Biology, 68(10):823–829, 2016
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Affiliation(s)
- Dan Shang
- Department of Vascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX
| | - Zuping Zhang
- Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX.,Department of Parasitology, School of Basic Medicine, Central South University, Changsha, China
| | - Qian Wang
- Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX
| | - Yali Ran
- Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX
| | - Tanner S Shaw
- Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX
| | - John N Van
- Department of Medicine, Infectious Disease Section, Baylor College of Medicine, Houston, TX
| | - Yuandong Peng
- Department of Medicine, Cardiovascular Research Section, Baylor College of Medicine, Houston, TX.
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Zhou H, Ran Y, Da Q, Shaw TS, Shang D, Reddy AK, López JA, Ballantyne CM, Ware J, Wu H, Peng Y. Defective Association of the Platelet Glycoprotein Ib-IX Complex with the Glycosphingolipid-Enriched Membrane Domain Inhibits Murine Thrombus and Atheroma Formation. THE JOURNAL OF IMMUNOLOGY 2016; 197:288-95. [PMID: 27206768 DOI: 10.4049/jimmunol.1501946] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 04/29/2016] [Indexed: 01/13/2023]
Abstract
Localization of the platelet glycoprotein Ib-IX complex to the membrane lipid domain is essential for platelet adhesion to von Willebrand factor and subsequent platelet activation in vitro. Yet, the in vivo importance of this localization has never been addressed. We recently found that the disulfide linkage between Ibα and Ibβ is critical for the association of Ibα with the glycosphingolipid-enriched membrane domain; in this study, we established a transgenic mouse model expressing this mutant human Ibα that is also devoid of endogenous Ibα (HαSSMα(-/-)). Characterization of this model demonstrated a similar dissociation of Ibα from murine platelet glycosphingolipid-enriched membrane to that expressed in Chinese hamster ovary cells, which correlates well with the impaired adhesion of the transgenic platelets to von Willebrand factor ex vivo and in vivo. Furthermore, we bred our transgenic mice into an atherosclerosis-prone background (HαSSMα(-/-)ApoE(-/-) and HαWTMα(-/-)ApoE(-/-)). We observed that atheroma formation was significantly inhibited in mutant mice where fewer platelet-bound CD11c(+) leukocytes were circulating (CD45(+)/CD11c(+)/CD41(+)) and residing in atherosclerotic lesions (CD45(+)/CD11c(+)), suggesting that platelet-mediated adhesion and infiltration of CD11c(+) leukocytes may be one of the mechanisms. To our knowledge, these observations provide the first in vivo evidence showing that the membrane GEM is physiologically and pathophysiologically critical in the function of the glycoprotein Ib-IX complex.
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Affiliation(s)
- Hao Zhou
- Department of Hospital Infection Management of Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Yali Ran
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Qi Da
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Tanner S Shaw
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Dan Shang
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030; Department of Vascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Anilkumar K Reddy
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - José A López
- Puget Sound Blood Center, Division of Hematology, Department of Medicine, University of Washington, Seattle, WA 98195
| | - Christie M Ballantyne
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Jerry Ware
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR 72205
| | - Huaizhu Wu
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Yuandong Peng
- Cardiovascular Research Section, Department of Medicine, Baylor College of Medicine, Houston, TX 77030;
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