申请人:Takeda Chemical Industries, Ltd.
公开号:US05506267A1
公开(公告)日:1996-04-09
A compound of the invention is represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, an acyl group; R.sup.3, R.sup.4, R.sup.6 and R.sup.7 are the same or different, hydrogen or an alkyl group; R.sup.5 is hydrogen, an alkyl group or a hydroxyl group which may optionally be protected, or R.sup.4 and R.sup.5 are combined to form a chemical bond; X is a carbonyl group or a sulfonyl group; Y is an amino acid sequence consisting of 1 to 7 amino acid residues which may optionally be protected and having optionally an intervening --SO.sub.2 NH--; n is an integer of 0 to 2, or a salt thereof. The compound or salt thereof of the present invention possesses immunoenhancing activity and platelet reduction recovery activity, and can be used as a prophylactic/therapeutic agent for leukocytopenia in cancer chemotherapy or radiotherapy, as an immunoenhancing agent in bone marrow transplantation therapy and the treatment of osteomyelodysplasia and aplastic anemia, and as a prophylactic/therapeutic agent for thrombocytopenia.
本发明的化合物由以下公式表示:##STR1##其中R.sup.1和R.sup.2是相同或不同的酰基;R.sup.3、R.sup.4、R.sup.6和R.sup.7是相同或不同的氢原子或烷基基团;R.sup.5是氢原子、烷基基团或可能被保护的羟基基团,或者R.sup.4和R.sup.5结合形成化学键;X是羰基团或磺酰基团;Y是由1至7个氨基酸残基组成的氨基酸序列,可能被保护,可能具有一个可选的--SO.sub.2 NH--插入;n是0至2的整数,或其盐。本发明的该化合物或其盐具有免疫增强活性和血小板减少恢复活性,可用作癌症化疗或放疗中白细胞减少症的预防/治疗剂,用作骨髓移植治疗和骨髓畸形和再生障碍性贫血治疗中的免疫增强剂,以及用作血小板减少症的预防/治疗剂。