Drug-induced hemolytic anemia and thrombocytopenia associated with alterations of cell membrane lipids and acanthocyte formation
| Autor: | Laura Engstrom, Robert C. Johnson, Frederique M. Poulet, Malaz AbuTarif, Kelley Penraat, Denise Manfra, Jay S. Fine, Brianna Peterson, Maria Geraci-Erck, Ellen W. Evans, Evan A. Thackaberry, Brian S. Cummings, Richard Geissler, Nathaniel Collins, Carlos Frugone |
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| Rok vydání: | 2010 |
| Předmět: |
Hemolytic anemia
Blood Platelets medicine.medical_specialty Anemia Hemolytic Receptors CXCR3 Membrane lipids Hypercholesterolemia Acanthocytes Biology Toxicology Pathology and Forensic Medicine Blood cell Membrane Lipids Internal medicine medicine Animals Platelet Molecular Biology Triglycerides Erythrocyte Membrane Erythrocyte fragility Cell Biology medicine.disease Thrombocytopenia Rats Sphingomyelins Red blood cell Osmotic Fragility Endocrinology medicine.anatomical_structure Cholesterol Hemosiderin Hematopoiesis Extramedullary Phosphatidylcholines Sphingomyelin Spleen |
| Zdroj: | Toxicologic pathology. 38(6) |
| ISSN: | 1533-1601 |
| Popis: | CXCR3 is a chemokine receptor, upregulated upon activation of T cells and expressed on nearly 100% of T cells in sites of inflammation. SCH 900875 is a selective CXCR3 receptor antagonist. Thrombocytopenia and severe hemolytic anemia with acanthocytosis occurred in rats at doses of 75, 100, and 150 mg/kg/day. Massively enlarged spleens corresponded histologically to extramedullary hematopoiesis, macrophages, and hemosiderin pigment and sinus congestion. Phagocytosed erythrocytes and platelets were within splenic macrophages. IgG and/or IgM were not detected on erythrocyte and platelet membranes. Ex vivo increased osmotic fragility of RBCs was observed. Lipid analysis of the RBC membrane revealed modifications in phosphatidylcholine, overall cholesterol, and/or sphingomyelin. Platelets exhibited slender filiform processes on their plasma membranes, analogous to those of acanthocytes. The presence of similar morphological abnormalities in acanthocytes and platelets suggests that possibly similar alterations in the lipid composition of the plasma membrane have taken place in both cell types. This phenotype correlated with alterations in plasma lipids (hypercholesterolemia and low triglycerides) that occurred after SCH 900875 administration, although other factors cannot be excluded. The increased cell destruction was considered triggered by alterations in the lipid profile of the plasma membranes of erythrocytes and platelets, as reflected morphologically. |
| Databáze: | OpenAIRE |
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