Abstract: This invention is directed to, inter alia, compositions comprised of pentosan polysulfate sodium (PPS) components and methods for making such compositions and using the same for the treatment of sickle cell disease (SCD). The disclosed compositions possess superior bioavailability as well as P-selectin blocking activity for the treatment of sickle-cell disease (SCD). Methods for using the same are additionally provided herein. Also provided herein is a method for detecting or quantifying PPS or a PPS fraction in solutions or in a biological sample obtained from an animal or an individual.

Abstract: This invention is directed to, inter alia, compositions comprised of pentosan polysulfate sodium (PPS) components and methods for making such compositions and using the same for the treatment of sickle cell disease (SCD). The disclosed compositions possess superior bioavailability as well as P-selectin blocking activity for the treatment of sickle-cell disease (SCD). Methods for using the same are additionally provided herein. Also provided herein is a method for detecting or quantifying PPS or a PPS fraction in solutions or in a biological sample obtained from an animal or an individual.

Abstract: A method of preventing pain in a sickle cell patient is disclosed. The method includes orally administering to the patient, an amount of an active agent effective on oral administration to inhibit binding of the patient's sickle erythrocytes to P-selectin on the patient's vascular endothelium. The inhibition may be evidenced in a number of ways. The active agent administration inhibits the adhesion of sickle erythrocytes to vascular endothelium in the patient, thereby preventing patient pain associated with vascular occlusion. Also disclosed are compositions useful in practicing the method.