Insulin-delivery from glucose-responsive polyamine-salt aggregates: smart "sense-and-treat" nanocarriers made easy

SANTIAGO E. HERRERA; AGAZZI, MAXIMILIANO L.; CORTEZ, M. LORENA; MARMISOLLÉ, WALDEMAR A.; TAGLIAZUCCHI, MARIO; AZZARONI, OMAR

Simposio; Vancouver Nanomedicine Day 2020; 2020

Polyamine-salt aggregates (PSA) are biomimetic soft-materials that have attracted great attentiondue to their straightforward fabrication methods, high drug-loading efficiencies and attractiveproperties for pH-triggered release. In this work, we constructed poly(allylaminehydrochloride)/phosphate PSAs through one-pot ionic gelation containing glucose oxidase asa glucose-responsive element, and human recombinant insulin as therapeutic drug for diabetesmellitus treatment (GI-PSA). The self-assembly process is depicted in Figure 1 (left side).The addition of increasing glucose concentrations promotes the release of insulin due to thedisassembly of GI-PSA, triggered by catalytic in-situ formation of gluconic acid (Figure 1, rightside). While under normoglycemia, the carrier integrity remained intact for at least 24 h withoutlosing Insulin, hyperglycemic conditions produced a 100% of cargo releasing after 4 h of glucoseaddition. This entirely supramolecular strategy presents great potential for the construction ofsmart glucose-responsive delivery nanocarriers.