Abstract: The disclosure provides a composition comprising red cell-derived microparticles (RMPs) demonstrating acetylcholine esterase (AchE) activity of less than 350 pmol/min/106 particles/uL. The disclosure further provides a method of treating excessive bleeding comprising administering the composition to a subject.

Abstract: The disclosure provides a composition comprising red cell-derived microparticles (RMPs) demonstrating clinically advantageous characteristics.

Abstract: Red blood cell membrane derived microparticles (RMP) are safe, economical, effective hemostatic agents in the treatment of a wide range of bleeding conditions and can, therefore, be considered as universal hemostatic agents. Effective RMP are produced from red blood cells using a high-pressure extrusion membrane shear process. The RMP can be lyophilized after production and retain activity even when stored at room temperature. RMP can be administered to original donors (autologous treatment), thus avoiding transfusion complications, or can be administered to blood type compatible recipients. RMP produced from type O, Rh negative red cells can be given to any person regardless of blood type. RMP can be administered to reduce excessive bleeding resulting from trauma, surgeries, invasive procedures and various bleeding disorders such as platelet disorders, either congenital or acquired, and coagulation disorders, either congenital or acquired.

Abstract: Red blood cell membrane derived microparticles (RMP) are safe, economical, effective hemostatic agents in the treatment of a wide range of bleeding conditions and can be considered as universal hemostatic agents. RMP are produced from red blood cells using a high-pressure extrusion membrane shear process and can be lyophilized after production and retain activity even when stored at room temperature. RMP can be administered to original donors (autologous treatment), thus avoiding transfusion complications, or can be administered to blood type compatible recipients. RMP produced from type O, Rh negative red cells can be given to any person regardless of blood type. RMP can be administered to reduce excessive bleeding resulting from trauma, surgeries, invasive procedures and various bleeding disorders such as platelet disorders, either congenital or acquired, and coagulation disorders, either congenital or acquired.

Abstract: Red blood cell membrane derived microparticles (RMP) are safe, economical, effective hemostatic agents in the treatment of a wide range of bleeding conditions and can, therefore, be considered as universal hemostatic agents. Effective RMP are produced from red blood cells using a high-pressure extrusion membrane shear process. The RMP can be lyophilized after production and retain activity even when stored at room temperature. RMP can be administered to original donors (autologous treatment), thus avoiding transfusion complications, or can be administered to blood type compatible recipients. RMP produced from type O, Rh negative red cells can be given to any person regardless of blood type. RMP can be administered to reduce excessive bleeding resulting from trauma, surgeries, invasive procedures and various bleeding disorders such as platelet disorders, either congenital or acquired, and coagulation disorders, either congenital or acquired.

Abstract: Compositions comprising membrane-derived and synthetic microparticles that induce platelet aggregation and are useful for treating bleeding disorders, particularly those involving platelet dysfunction. Microparticles include endothelial derived microparticles (EMP), platelet derived microparticles (PMP), erythrocyte derived microparticles (RMP), and synthetic microparticles (SMP), and are used to treat disorders such as thrombocytopenia caused by chemotherapy.

Abstract: Danazol, a known androgen, is used to (1) correct immune abnormalities associated with hemotologic disorders or (2) treating immune disorders associated with depressed T helper cells, in the invention disclosed.

Abstract: Treatment of sickle cell disease using danazol.

Abstract: Calcium (Ca.sup.2+) channel blockers, such as nifedipine and verapamil, are used in the treatment of thromboembolic diseases such as stroke and peripheral vascular occlusive diseases, especially arterial and venous thrombosis, vasculitis, myelofibrosis disease and hemolytic anemias. Such diseases arise from platelet hyperactivation and the Ca.sup.2+ channel blockers restore the platelets to their normal aggregation characteristics. Diagnostic procedures for detecting platelet hyperactivation and defective calcium handling/transport indicative of certain peripheral obstructive diseases using chlorotetracycline as a detectable fluorescent probe as a means of assessing a patient's response to Ca.sup.2+ channel blockers in the therapy of such diseases are also described.