Disclosed are a drug having renal selectivity and a drug carrier for specifically transporting a drug supported thereon to a kidney. A segment structure specifically recognizable in the kidney is utilized. More specifically, since a segment structure represented by formula (I) is kidney-oriented, introduction of a drug into a molecule having the segment structure can provide a renal targeting drug. A compound, which has the segment structure and can support a drug thereon, can be utilized as a drug carrier which can specifically transport a drug supported thereon to the kidney.
A-U-V- (I)
wherein A represents glycosyl, such as glucosyl, mannosyl, or 2-deoxy-glucosyl; U represents O, S, or NH; and V represents an aromatic hydrocarbon or a straight-chain or branched C1-18 aliphatic hydrocarbon.
Carbohydrate antigenic determinants containing a glycosidically linked bridging arm are synthesized and coupled to carrier molecules to form artificial antigens, and to solid supports to form immunoabsorbants. These artificial antigens are used to detect antibodies to the carbohydrate haptens, and to raise antisera specific for the carbohydrate antigenic determinants. The immunoabsorbants are used to purify or remove antibodies to the carbohydrate haptens. Specific examples are given to the synthesis of the Lewis-a, Lewis-b, B, and H(O) blood group antigens; to the preparation of antisera to these artificial antigens, and to the preparation of immunoabsorbants specific for antibodies to these antigens.
Carbohydrate antigenic determinants containing a glycosidically linked bridging arm are synthesized and coupled to carrier molecules to form artificial antigens, and to solid supports to form immunoadsorbents. Various artificial antigens of the blood group type are prepared and applications shown. Specific examples are given to the synthesis of the Lewis-a, Lewis-b, A, B, and H(O) blood group antigens; to the preparation of antisera to these artificial antigens, to the preparation of immunoadsorbents specific for antibodies to these antigens, and to the detection of such antigens wherever they occur.