This invention discloses a modified
American cockroach polypeptide derivative, its preparation method,
polypeptide composition, and applications. The
amino acid sequence of the polypeptide derivative is shown in SEQ ID NO: 1 (PA1702); it is modified by replacing the
asparagine at position 13 of the natural polypeptide PA1701 with
glutamine, and can be prepared by Fmoc
solid-phase polypeptide synthesis.
Network pharmacology predicts that it acts on 59 core anti-inflammatory targets, enriched in pathways such as PI3K-Akt and MAPK. Molecular docking shows that PA1702 has a
strong binding affinity for TNF-α and AKT1.
In vitro experiments confirm that PA1702 is non-cytotoxic, can inhibit LPS-induced release of NO, TNF-α, IL-6, and IL-1β, and promote
cell migration. The above-mentioned polypeptide derivative can be used as an
active ingredient in
cosmetics or pharmaceutical compositions; it has anti-inflammatory,
skin barrier repair, and
wound healing promotion effects, and can be used to prepare anti-inflammatory,
skin barrier repair, and
wound healing-promoting
cosmetics or drugs.