A variety of N-(acyOmuramoyl-dipeptides were synthesized and their immunoadjuvant activities were examined on the induction of delayed-type hypersensitivity to N-acetyl-l-tyrosine-3- azobenzene-4′-arsonate in guinea pigs. It was found that introduction of acyl groups to the 2-amino group in muramoyl-l-valyl- or -l-seryl-d-isoglutamine reduced the activity with the increasing length of the acyl group, although all N-(acyl)muramoyl-l-alanyl-d-isoglutamines were active as an adjuvant. The results suggest that development of the adjuvant activity of N-(acyl)muramoyl- dipeptides is closely related to both the length of the acyl group and the bulkiness of the peptide moiety.
多种N-(酰基胞壁酰)二肽被合成,并检测了它们在诱发豚鼠对
N-乙酰-L-酪氨酸-3-
偶氮苯-4′-
砷酸的迟发型超敏反应中的免疫佐剂活性。研究发现,将酰基引入胞壁酰-L-缬
氨酰-或-L-丝
氨酰-D-异谷
氨酰胺的2-
氨基组,随着酰基链长的增加,活性降低,尽管所有N-(酰基)胞壁酰-L-丙
氨酰-D-异谷
氨酰胺都具有佐剂活性。结果表明,N-(酰基)胞壁酰二肽的佐剂活性的开发与酰基链的长度和肽部分的体积密切相关。