1,25-Dihydroxyvitamin D3 attenuates platelet aggregation potentiated by SARS-CoV-2 spike protein via inhibiting integrin αIIbβ3 outside-in signaling
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View abstract on PubMed
Summary
This summary is machine-generated.Vitamin D (1,25(OH)2D3) reduces platelet hyperreactivity caused by the SARS-CoV-2 spike protein. This effect is mediated by downregulating integrin signaling, offering potential therapeutic insights for COVID-19-related clotting.
Area Of Science
- Cardiovascular Biology
- Immunology
- Endocrinology
Background
- Platelet hyperreactivity is implicated in COVID-19 pathogenesis, leading to hypercoagulability and thrombosis.
- Vitamin D deficiency correlates with increased COVID-19 severity.
- Vitamin D supplementation is a common, safe dietary intervention.
Purpose Of The Study
- To investigate the direct effects of 1,25(OH)2D3 on platelet hyperreactivity induced by SARS-CoV-2 spike protein.
- To elucidate the underlying molecular mechanisms of 1,25(OH)2D3's action on platelets.
Main Methods
- In vitro platelet functional studies.
- Western blot analysis to assess signaling pathways.
- Utilized SARS-CoV-2 spike protein to induce platelet responses.
- Employed Src family kinase inhibitor (PP2) for mechanistic insights.
Main Results
- 1,25(OH)2D3 attenuated platelet aggregation and Src-mediated signaling.
- 1,25(OH)2D3 inhibited spike protein-potentiated platelet aggregation in vitro.
- 1,25(OH)2D3 downregulated spike protein-induced integrin αIIbβ3 outside-in signaling, including platelet spreading and phosphorylation of β3, c-Src, and Syk.
- Combined inhibition with PP2 and 1,25(OH)2D3 showed no additive effects, suggesting a shared pathway.
Conclusions
- 1,25(OH)2D3 mitigates platelet hyperreactivity induced by the SARS-CoV-2 spike protein.
- The mechanism involves the downregulation of integrin αIIbβ3 outside-in signaling.
- These findings suggest a potential role for Vitamin D in managing COVID-19-associated thrombotic complications.
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