Evaluation of Cannabis sativa L. Callus Extract as a Novel Cosmetic Ingredient with Dual Anti-Inflammatory and Antioxidant Effects

The plant callus culture technique is an emerging source of bioactive compounds with potential applications in cosmetics and pharmaceuticals. Callus-derived extracts contain high concentrations of secondary metabolites with significant antioxidant and anti-inflammatory properties when elicited. <i>Cannabis sativa</i> L. has been used for its medicinal effects; however, the potential of its <i>C. sativa</i> callus extract (CCE) for cosmetic applications remains unexplored. Callus from <i>C. sativa</i> was induced in vitro using a Murashige and Skoog (MS) medium supplemented with Thidiazuron (TDZ) and naphthalene acetic acid (NAA). The extract was analyzed for its bioactive composition using high-performance liquid chromatography (HPLC). The antioxidant activity was assessed using the DPPH radical scavenging assay. The anti-inflammatory effects were evaluated in lipopolysaccharides (LPS)-stimulated RAW264.7 macrophages by measuring nitric oxide (NO) production, DAF-2 fluorescence intensity, released cytokine levels, and protein expression of inflammatory mediators via ELISA, Western blot, and immunofluorescence assays. CCE demonstrated significant radical scavenging activity. CCE effectively suppressed LPS-induced NO production and reduced pro-inflammatory cytokine levels. Western blot analysis revealed that CCE inhibited NF-κB nuclear translocation while upregulating NRF2-mediated antioxidant responses. Furthermore, HPLC analysis confirmed the presence of cannabinoids, which could potentially be associated with the modulation of inflammatory pathways through the endocannabinoid system. This study provides evidence that CCE possesses notable antioxidant and anti-inflammatory properties, making it a promising ingredient for cosmetic formulations targeting oxidative stress and inflammatory skin conditions.