Synthesis and biological activity of ester and ether analogues of α-galactosylceramide (KRN7000)
作者:Masao Shiozaki、Takuya Tashiro、Hiroyuki Koshino、Ryusuke Nakagawa、Sayo Inoue、Tomokuni Shigeura、Hiroshi Watarai、Masaru Taniguchi、Kenji Mori
DOI:10.1016/j.carres.2010.05.003
日期:2010.8
(alphaGalCer, KRN7000) has been identified as a modulator of immunological processes through its capacity to bind iNKT cells mediated by CD1d molecules. Some analogues in while the amide group in alphaGalCer is replaced with ester or ether groups were synthesized from d-arabinitol or l-ribose to evaluate their ability to activate iNKT cells. Ester analogues 30a, 31a, and 61 showed activity for IFNgamma
The invention provides esterified α-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I):
wherein R
1
is a hydrocarbon group having a carbon number of 1 to 30, R
2
is a hydrocarbon group having a carbon number of 1 to 20, R
3
is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R
4
and R
5
are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R
4
and R
5
in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.