Chemical synthesis and adjuvant activity of N-acetylmuramyl-L-alanyl-D-isoglutamine (MDP) analogs.
作者:KEIICHI KAMISANGO、IKUO SAIKI、YOSHIRO TANIO、SHIGERU KOBAYASHI、TSUNEHIKO FUKUDA、ISAO SEKIKAWA、ICHIRO AZUMA、YUICHI YAMAMURA
DOI:10.1248/cpb.29.1644
日期:——
Twenty-two kinds of N-acetylmuramyl-L-alanyl-D-isoglutamine (MDP) analogs were synthesized and their adjuvant activity on the induction of delayed-type hypersensitivity to ABA-N-acetyl-L-tyrosine was examined. The L-alanine residue of MDP could be replaced with certain other amino acid residues without loss of activity. The structureactivity relationship of these compounds is discussed. With respect to replacement of the L-alanine residue of MDP in connection with adjuvant activity, it was shown that (1) amino acids having a suitable side chain were effective, (2) basic amino acids were unfavorable, (3) aromatic amino acids were unfavorable, and (4) acidic amino acids were effective. The D-isoglutamine residue of MDP was considered to be essential for the adjuvant activity. The adjuvant activity was decreased by esterification with methanol of the D-glutamic acid residue of MDP and related N-acetylmuramyldipeptides, but the adjuvant activity of D-glutamic acid diamide analogs was similar to that of MDP and its analogs.
合成了二十二种N-乙酰胞壁酰-L-丙氨酰-D-异谷氨酰胺(MDP)的类似物,并检验了它们对诱导对ABA_N-乙酰-L-酪氨酸的迟发型过敏反应的佐剂活性。MDP的L-丙氨酸残基能为某些其他氨基酸残基所置换,而活性不变。讨论了这些化合物的结构-活性关系。关于MDP中L-丙氨酸残基的置换和佐剂活性,表明; (1)具有合适侧链的氨基酸是有效的; (2)碱性氨基酸不是有利的; (3)芳香族的氨基酸不是有利的; (4)酸性氨基酸是有效的。认为MDP的D-异谷氨酰胺残基对佐剂活性是必要的。与MDP和有关N-乙酰胞壁酰二肽的D-谷氨酸残基的酯化作用使佐剂活性降低,但D-谷氨酸二酰胺类似物的佐剂活性与MDP及其类似物的佐剂活性相似。