The invention relates to the field of active
peptide preparation, in particular to a preparation method and application of modified
protein peptide for improving memory, and the preparation method comprises the following steps: S1, adding modified chimeric
peptide and
piperine into 70% wt of
ethanol aqueous solution, and adding zein to obtain an organic phase; according to the invention, a neuroprotective
peptide fragment and a core memory improving peptide are embedded by an
enzyme method and subjected to fixed-point palmitoylation modification, and then the neuroprotective
peptide fragment and the core memory improving peptide are entrapped in zein-
chitosan nanoparticles together with an absorption
enhancer piperine, so that an oral co-loading
delivery system is constructed; functional
synergy and efficient targeted delivery of the active peptide are achieved, meanwhile, the whole preparation process is green and mild, purification is efficient, the
bioavailability,
efficacy and production feasibility of polypeptide products are remarkably improved, and the polypeptide has wide application prospects in the fields of
functional food, special
medical food and pharmaceutical preparations.