An encapsulation
system for use in the treatment of diabetes (Types 1 or 2, and LADA) are provided. The
system has (1) a
delivery vehicle comprising a selectively permeable membrane that allows passage of glucose,
insulin and other nutrients through the membrane, but prevents large molecules such as antibodies or inflammatory cells from passing through the membrane; (2) a
population of
islet cells or
insulin producing cells encapsulated by said membrane; and (3) a biological response modifier that may be in contact with the membrane or encapsulated by the membrane. Generally, the biological response modifier is a compound, including resolved enantiomers, diastereomers, tautomers, salts and solvates thereof, having the following formula:wherein:X, Y and Z are independently selected from a member of the group consisting of C(R3), N, N(R3) and S;R1 is selected from a member of the group consisting of
hydrogen, methyl, C(5-9)
alkyl, C(5-9)alkenyl, C(5-9)alkynyl, C(5-9)hydroxyalkyl, C(3-8)alkoxyl, C(5-9)alkoxyalkyl, the R1 being optionally substituted;R2 and R3 are independently selected from a member of the group consisting of
hydrogen, halo, oxo, C(1-20)
alkyl, C(1-20)hydroxyalkyl, C(1-20)thioalkyl, C(1-20)alkylamino, C(1-20)alkylaminoalkyl, C(1-20)aminoalkyl, C(1-20)aminoalkoxyalkenyl, C(1-20)aminoalkoxyalkynyl, C(1-20)diaminoalkyl, C(1-20)triaminoalkyl, C(1-20)tetraaminoalkyl, C(5-15)aminotrialkoxyamino, C(1-20)alkylamido, C(1-20)alkylamidoalkyl, C(1-20)amidoalkyl, C(1-20)acetamidoalkyl, C(1-20)alkenyl, C(1-20)alkynyl, C(3-8)alkoxyl, C(1-11)alkoxyalkyl, and C(1-20)dialkoxyalkyl.