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Updated: May 31, 2026
Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
Published on: November 22, 2024
Platelet expression of stromal-cell-derived factor-1 (SDF-1): an indicator for ACS?
Thomas Wurster1, Konstantinos Stellos, Michael Haap
1Medizinische Klinik III, Kardiologie und Kreislauferkrankungen, Eberhard-Karls-Universität Tübingen, Germany.
Insights
Platelet stromal-cell-derived factor-1 (SDF-1) expression is elevated in acute coronary syndrome (ACS) patients. This finding suggests platelet SDF-1 may serve as an early biomarker for cardiovascular risk stratification.
Area of Science:
- Cardiology
- Hematology
- Biomarker Discovery
Background:
- Acute coronary syndrome (ACS) is a primary cause of chest pain and myocardial ischemic injury.
- Platelet stromal-cell-derived factor-1 (SDF-1) expression increases during ischemia, potentially aiding tissue regeneration.
- This study investigated platelet SDF-1 expression in patients presenting with chest pain.
Purpose of the Study:
- To evaluate platelet surface expression of SDF-1 in patients with chest pain.
- To determine if SDF-1 expression levels correlate with the diagnosis of ACS.
- To assess the potential of platelet SDF-1 as an early biomarker for cardiovascular risk.
Main Methods:
- 1000 patients admitted with chest pain were consecutively evaluated.
- Whole blood flow cytometry was used to measure platelet surface expression of SDF-1 and GPIb.
- Statistical analyses, including logistic regression and ROC analysis, were performed.
Main Results:
- Patients with ACS exhibited significantly higher platelet SDF-1 expression compared to those with stable angina pectoris (SAP) or other causes of chest pain (CPO).
- Logistic regression confirmed a significant association between platelet SDF-1 expression and ACS (P=0.026).
- Receiver operating characteristic analysis showed an AUC of 0.718 for SDF-1 versus 0.795 for troponin-I; elevated SDF-1 (≥ 27.7 MFI) indicated a 1.4-fold increased risk for ACS.
Conclusions:
- Platelet SDF-1 surface expression is significantly elevated in patients diagnosed with ACS.
- Platelet SDF-1 determination shows promise as an early additional biomarker for cardiovascular risk stratification.
- Further research may elucidate the role of SDF-1 in ACS pathogenesis and management.
Background:
Acute coronary syndrome (ACS) along with myocardial ischemic injury are the leading causes for chest pain. Platelet surface expression of stromal-cell-derived factor-1 (SDF-1) is enhanced during ischemic events and may play an important role in trafficking hematopoietic progenitor cells for tissue regeneration and neovascularization. This study examined the platelet surface expression of SDF-1 in patients with chest pain.
Methods:
We consecutively evaluated 1000 patients, who were admitted to the emergency department with chest pain. Platelet surface expression of GPIb and SDF-1 was determined by two-color whole blood flow cytometry.
Results:
Patients with ACS showed significantly enhanced SDF-1 expression on admission compared to patients with other causes such as stable angina pectoris (SAP) and other origin of chest pain (CPO) (ACS vs. SAP/CPO (mean fluorescence intensity (MFI)± SD): 39.7 ± 26.3 vs. SAP: 37.6 ± 31.5;P=0.045; arterial hypertension: 27.3 ± 12.7;P=0.003; orthopedic disease: 22.1 ± 6.5;P=0.014; pulmonary embolism: 26.6 ± 19.1;P=0.003; Da Costa's syndrome: 22.1 ± 12.5;P=0.021; inflammatory cardiomyopathy: 19.8 ± 11.5;P=0.025). Logistic regression analysis showed that surface expression of platelet SDF-1 was significantly associated with ACS (P=0.026), however, the superiority of troponin-I in predicting ACS remains on a high level (P=0.001). Areas under the curve of receiver operating characteristic analysis revealed 0.718 (95% confidence interval (CI):0.680-0.757) using SDF-1, and 0.795 (95%CI:0.760-0.829) applying troponin-I baseline serum levels. Patients with enhanced SDF-1 levels (cutoff:MFI ≥ 27.7) had a 1.4-fold relative risk (95%CI:1.17-1.52) for ACS.
Conclusions:
Platelet SDF-1 surface expression was significantly enhanced in patients with ACS compared to SAP or CPO. Determination of platelet SDF-1 may be useful as an early additional biomarker for cardiovascular risk stratification.
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