Acidic and alkaline pullulan derivative, called respectively SUPL and AMPL, were synthesized and characterized.
Pullulan, SUPL and AMPL activated TLRs-mediated MyD88-dependent type I IFN and NF-κB signal pathways in CAL-1 cells.
AMPL showed remarkably enhanced immunomodulatory activities compared to pullulan and SUPL.
AMPL showed great potential to be used as a potent immunomodulatory agent.