Journal: Journal of Veterinary Emergency and Critical Care
Article Title: Assessment of Platelet Storage Lesions, Viability, and Function in Canine Platelet Concentrate Units Stored at 4°C for 14 Days
doi: 10.1111/vec.13470
Figure Lengend Snippet: Flow cytometry analysis of platelet activation by surface P‐selectin expression (CD62P) in six canine platelet concentrate units stored at 4°C for 14 days. (A) In unstimulated (resting) platelets, platelet activation was measured as percentage of P‐selectin‐positive cells and P‐selectin surface density, measured as median fluorescence intensity (MFI). Over time, an increased number of P‐selectin‐positive platelets was detected and was significantly higher on Days 12 and 14. However, this did not translate to increased MFI over time since P‐selectin MFI was lower from Day 9. Platelet response to the agonists (B) adenosine diphosphate (ADP), (C) convulxin (CVX), and (D) thrombin (Throm) was measured by fold change (FC) in MFI (log10) relative to resting platelets. (B) Response to ADP was minimal until Days 12 and 14. (C) Compared to ADP, convulxin was able to elicit platelet activation throughout the storage period with maximum response noted on Day 7. (D) A decline in response to thrombin was noted. After Day 7, P‐selectin upregulation in response to thrombin was minimal and significantly less compared to Day 0.
Article Snippet: Bovine α‐thrombin, Prolytix, Essex Junction, VT.
Techniques: Flow Cytometry, Activation Assay, Expressing, Fluorescence