Authors
Tingmin Qu, Shiyu Wen, Liangjie Hu, Ying Wu, Ruibo Huang, Hao Wu, Daichen Mu, Qingming Huang, Jian Hu, Li Wen
Published in
Plant foods for human nutrition (Dordrecht, Netherlands). Volume 81. Issue 3. Jun 27, 2026. Epub Jun 27, 2026.
Abstract
Food-derived biopeptides have attracted increasing attention due to their potential health benefits and favorable safety profiles. In this study, rice protein hydrolysates (< 3 kDa) and their derived peptides were investigated for their protective effects against tumor necrosis factor (TNF)-α/interferon (IFN)-γ-induced injury in human keratinocyte cells (HaCaT). The hydrolysates significantly enhanced cell viability and migration, and five peptides were identified by LC-MS/MS and in-silico analysis. These peptides improved the viability of damaged cells, with PG9 (PSWVAFTGG) showing the greatest activity. PG9 significantly downregulated the mRNA expression of pro-inflammatory cytokines, including Regulated on Activation, Normal T-cell Expressed and Secreted (RANTES), Interleukin (IL)-1β, IL-6, and IL-23, while also markedly promoting keratinocyte migration. Molecular dynamics simulations revealed that PG9 formed stable hydrogen-bonds with key residues (Lys745 and Asp855) within the epidermal growth factor receptor (EGFR) binding site, suggesting its involvement in EGFR-mediated wound healing signaling. In addition, PG9 regulated the PI3K/AKT/mTOR pathway by reducing the expression of PI3K, AKT, mTOR, and inhibiting AKT phosphorylation. These results identify PG9 as a stable EGFR-binding peptide capable of modulating inflammatory signaling and supporting its potential as a natural agent for skin repair.
PMID:
42364030
Bibliographic data and abstract were imported from PubMed on 27 Jun 2026.
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