The cationic antimicrobial peptide LL-37 modulates dendritic cell differentiation and dendritic cell-induced T cell polarization.
Davidson. Donald J DJ; Currie. Andrew J AJ; Reid. Gregor S D GS; Bowdish. Dawn M E DM; MacDonald. Kelly L KL; Ma. Rebecca C RC; Hancock. Robert E W RE; Speert. David P DP
Key Findings
- LL‑37 alters dendritic cell differentiation and boosts their ability to take up material
- It increases expression of costimulatory molecules and Th‑1‑promoting cytokines
- LL‑37‑treated dendritic cells drive stronger Th‑1 polarization in T cells
Practical Outcomes
- LL‑37 looks promising as an immune‑modulating tool, but the research is still early and done in lab dishes. There’s no clear dosage or delivery method for personal use, so biohackers should wait for clinical studies before trying it as a supplement for health or performance.
Summary
The study shows that the natural peptide LL‑37 can change how immune cells called dendritic cells develop, making them better at grabbing stuff, showing more activation signals, and pushing other immune cells toward a Th‑1 type response, which is important for fighting infections.
Abstract
Dendritic cells (DC) are instrumental in orchestrating an appropriately polarized Th cell response to pathogens. DC exhibit considerable phenotypic and functional plasticity, influenced by lineage, Ag engagement, and the environment in which they develop and mature. In this study, we identify the human cationic peptide LL-37, found in abundance at sites of inflammation, as a potent modifier of DC differentiation, bridging innate and adaptive immune responses. LL-37-derived DC displayed significantly up-regulated endocytic capacity, modified phagocytic receptor expression and function, up-regulated costimulatory molecule expression, enhanced secretion of Th-1 inducing cytokines, and promoted Th1 responses in vitro. LL-37 may be an attractive therapeutic candidate for manipulating T cell polarization by DC.
Study Information
pubmed
2004
2004-01-15T00:00:00.000Z
10.4049/jimmunol.172.2.1146
272
48