Related Experiment Video
Updated: Aug 8, 2026
Detection of Human Leukocyte Antigen Biomarkers in Breast Cancer Utilizing Label-free Biosensor Technology
Published on: March 24, 2015
HLA-C expression on platelets: studies with an HLA-Cw1-specific human monoclonal antibody
1Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands.
Insights
Platelets express Human Leukocyte Antigen-C (HLA-C), though at lower levels than lymphocytes. This finding suggests HLA-C plays a minimal role in immunological platelet refractoriness.
Area of Science:
- Immunogenetics
- Hematology
Background:
- Human Leukocyte Antigen-C (HLA-C) expression on platelets is understudied due to limited specific antibodies.
- A novel IgM monoclonal antibody (VP6G3) targeting HLA-Cw1 was utilized.
Purpose of the Study:
- To investigate the expression of HLA-Cw1 on human platelets.
- To assess the role of HLA-C in platelet refractoriness.
Main Methods:
- Flow cytometry was employed to quantify HLA-Cw1 expression on platelets and lymphocytes.
- Complement-dependent cytotoxicity assays were performed using platelets and lymphocytes as targets.
Main Results:
- Flow cytometry revealed lower HLA-Cw1 expression on platelets compared to peripheral blood lymphocytes, with inter-individual variations.
- Complement-dependent cytotoxicity assays showed no lysis of platelets, while lymphocytes were effectively lysed.
Conclusions:
- Platelets express HLA-C, confirming previous limited findings.
- The study indicates a negligible role for HLA-C in immunological platelet refractoriness.
Background And Objectives:
The expression of HLA-C on the surface of platelets is rarely studied due to the lack of proper alloantisera. We addressed this question using an IgM human monoclonal antibody directed against HLA-Cw1 (VP6G3).
Material And Methods:
Both flow cytometry and complement dependent cytotoxicity studies were used in the current analysis.
Results:
The expression of the HLA-Cw1 antigen on platelets is lower than on peripheral blood lymphocytes as shown by flow cytometry. Variation in expression levels between individuals is also observed. Using this antibody in a complement-dependent cytotoxicity assay, we did not observe lysis using platelets as targets, whereas peripheral blood lymphocytes of the same blood donors were adequately lysed.
Conclusions:
These results confirm that platelets indeed express HLA-C. Furthermore, the results support the insignificant role of HLA-C in immunological platelet refractoriness.
