Platelet Immunophenotyping Service

Introduction: The Critical Role of Platelet Immunophenotyping in Hemostasis

Platelets are pivotal cellular components in hemostasis, the intricate physiological process that prevents blood loss following vascular injury. Beyond their well-established role in primary hemostasis—involving adhesion, activation, and aggregation to form a stable platelet plug—recent decades have illuminated their broader involvement in diverse pathophysiological processes, including inflammation, immunity, and arterial thrombosis. Accurate assessment of platelet function and characterization of their surface protein expression are therefore paramount for diagnosing a spectrum of bleeding disorders, monitoring the efficacy of antiplatelet therapies, and identifying individuals at elevated risk of thrombotic events.

Traditional platelet function tests, such as Light Transmission Aggregometry (LTA), while foundational, often require specialized expertise and can be labor-intensive. The advent of flow cytometry has revolutionized the field, offering a precise, quantitative, and multiparametric approach to analyze platelet characteristics directly from whole blood. This advanced technique, known as platelet immunophenotyping, enables the identification and quantification of specific proteins (antigens) on the platelet surface, providing unparalleled insights into their activation status, functional integrity, and underlying abnormalities. At Creative Biolabs, with over two decades of dedicated experience in biological diagnostics, we leverage cutting-edge flow cytometry to deliver a comprehensive platelet immunophenotyping service, empowering clinicians and researchers with actionable data.

Fig.1 Schematic of platelets' role in health and disease.1

Our Platelet Immunophenotyping Service

Recognizing the nuanced complexity of platelet biology, our platelet immunophenotyping service is meticulously designed to provide highly accurate and reproducible data on platelet surface marker expression. This capability is indispensable for both routine clinical diagnostics and advanced research applications, offering a deeper understanding of platelet behavior ex vivo. Our commitment to employing state-of-the-art flow cytometric platforms, coupled with the profound expertise of our biological specialists, ensures that every analysis yields precise and clinically relevant insights.

Our service is tailored to address the growing demand for sophisticated platelet assessments, moving beyond rudimentary functional tests to provide a molecular-level characterization. Whether it's diagnosing rare inherited platelet disorders, assessing the effectiveness of novel antiplatelet agents, or exploring the role of platelets in complex disease pathologies, Creative Biolabs stands as your trusted partner in unraveling platelet dynamics.

Service Content

Our Platelet Immunophenotyping Service meticulously analyzes a panel of crucial platelet surface markers, providing a comprehensive profile of platelet status. The analysis is performed on sodium citrate-anticoagulated whole blood, minimizing in vitro artifacts and ensuring a physiologically relevant assessment.

• Key Platelet Markers and Their Functional Significance:
  • P-selectin (CD62P): This transmembrane glycoprotein is rapidly translocated from the α-granule membrane to the platelet surface upon activation. Its expression serves as a robust indicator of platelet degranulation and activation. Quantification of surface P-selectin provides direct evidence of platelet activation in response to various stimuli, reflecting the release of pro-coagulant and inflammatory mediators.
  • Activated Glycoprotein (GP)IIb-IIIa (Integrin αIIbβ3): This integrin complex is the most abundant receptor on the platelet surface and is critical for platelet aggregation. Upon activation, GPIIb-IIIa undergoes a conformational change, transitioning from a low-affinity to a high-affinity state for its ligands, primarily fibrinogen and von Willebrand factor. Our service utilizes the PAC1 antibody, which specifically binds only to the activated conformation of GPIIb-IIIa, providing a precise measure of the platelet's readiness to aggregate and form a stable thrombus.
  • Glycoprotein Ib-IX-V Complex (GPIb-IX-V): This complex plays a fundamental role in platelet adhesion to the subendothelial matrix, particularly by binding to von Willebrand factor (vWF) at sites of vascular injury. Deficiencies or abnormalities in this complex are characteristic of Bernard-Soulier syndrome, a severe inherited bleeding disorder. Analysis of GPIb-IX-V expression is crucial for diagnosing such adhesion defects.
  • CD63: A lysosomal-associated membrane protein, CD63 is expressed on the platelet surface following the release of contents from dense granules and lysosomes. Its surface expression is another reliable marker of robust platelet activation and secretion.
• Rigorous Methodology and Controls:

Our flow cytometric protocol involves precise incubation of whole blood aliquots with fluorescently labeled monoclonal antibodies. The reaction is meticulously stopped with formaldehyde fixation to preserve cell morphology and antigenicity. Rigorous negative controls, including isotype-matched antibodies and specific receptor antagonists (e.g., eptifibatide for activated GPIIb-IIIa), are employed to ensure the specificity and accuracy of all measurements. This meticulous approach allows Creative Biolabs to provide highly reliable data for diagnosing conditions by assessing platelet-associated antibodies.

Our Advantages

Creative Biolabs' Platelet Immunophenotyping Service is distinguished by a unique combination of unparalleled expertise and cutting-edge technological sophistication, forged over 20 years in the biological industry.

• Precision and Accuracy
• Comprehensive Data Interpretation
• Whole Blood Analysis
• Customizable Panels

FAQs

Contact Us

For detailed inquiries regarding Creative Biolabs' Platelet Immunophenotyping Service, to discuss your specific diagnostic or research needs, or to request a quote, please do not hesitate to contact our expert team.

Reference

1. Chaudhary, Preeti Kumari et al. "An Insight into Recent Advances on Platelet Function in Health and Disease." International journal of molecular sciences vol. 23,11 6022. 27 May. 2022, doi:10.3390/ijms23116022. Distributed under Open Access License CC BY 4.0, without modification.

For Research Use Only | Not For Clinical Use