Platelet proteome links metabolism to reactivity in Essential Thrombocythemia. (PubMed, Mol Cell Proteomics)
Acetylsalicylic acid (ASA) decreased the abundance of metabolic proteins in CALR Type1 platelets, whereas JAK2 V617F platelets showed only minor, heterogeneous increases restricted to a subset of proteins and samples. In functional assays, JAK2 V617F platelets showed aggregation responses similar to or lower than those of healthy controls, whereas untreated CALR Type2 platelets showed higher CD62P expression, indicating a more activated phenotype than the other ET groups. These findings indicate that ET platelets display mutation-associated proteomic and functional differences and suggest that an altered metabolic state may contribute to platelet reactivity.