Dépôt numérique

Neuronal Uptake and Neuroprotective Effect of Curcumin-Loaded PLGA Nanoparticles on the Human SK-N-SH Cell Line

Doggui, Sihem; Sahni, Jasjeet Kaur; Arseneault, Madeleine; Dao, Le et Ramassamy, Charles ORCID logoORCID: https://orcid.org/0000-0002-3252-5878 (2012). Neuronal Uptake and Neuroprotective Effect of Curcumin-Loaded PLGA Nanoparticles on the Human SK-N-SH Cell Line Journal of Alzheimer's Disease , vol. 30 , nº 2. pp. 377-392. DOI: 10.3233/JAD-2012-112141.

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Curcumin, a natural polyphenolic pigment present in the spice turmeric (Curcuma longa), is known to possess a pleiotropic activity such as antioxidant, anti-inflammatory, and anti-amyloid-β activities. However, these benefits of curcumin are limited by its poor aq. soly. and oral bioavailability. In the present study, a polymer-based nanoparticle approach has been utilized to deliver drugs to neuronal cells. Curcumin was encapsulated in biodegradable poly (lactide-co-glycolide) (PLGA) based-nanoparticulate formulation (Nps-Cur). Dynamic laser light scattering and transmission electronic microscopy anal. indicated a particle diam. ranging from 80 to 120 nm. The entrapment efficiency was 31% with 15% drug-loading. In vitro release kinetics of curcumin from Nps-Cur revealed a biphasic pattern with an initial exponential phase followed by a slow release phase. Cellular internalization of Nps-Cur was confirmed by fluorescence and confocal microscopy with a wide distribution of the fluorescence in the cytoplasm and within the nucleus. The prepd. nanoformulation was characterized for cellular toxicity and biol. activity. Cytotoxicity assays showed that void PLGA-nanoparticles (Nps) and curcumin-loaded PLGA nanoparticles (Nps-Cur) were nontoxic to human neuroblastoma SK-N-SH cells. Moreover, Nps-Cur was able to protect SK-N-SH cells against H2O2 and prevent the elevation of reactive oxygen species and the consumption of glutathione induced by H2O2. Interestingly, Nps-Cur was also able to prevent the induction of the redox-sensitive transcription factor Nrf2 in the presence of H2O2. Taken together, these results suggest that Nps-Cur could be a promising drug delivery strategy to protect neurons against oxidative damage as obsd. in Alzheimer's disease.

Type de document: Article
Mots-clés libres: Alzheimer's disease; antioxidant; glutathione; Nrf2; reactive oxygen species
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 07 mars 2024 16:41
Dernière modification: 07 mars 2024 16:41
URI: https://espace.inrs.ca/id/eprint/14017

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