Cytotoxic Impact of Naringenin-Loaded Solid Lipid Nanoparticles on RIN5F Pancreatic β Cells via Autophagy Blockage.

Background: Autophagy plays a crucial role in modulating the proliferation of cancer diseases. However, the application of Naringenin (Nar), a compound with potential benefits against these diseases, has been limited due to its poor solubility and bioavailability.

Objective: This study aimed to develop solid lipid nanoparticles (Nar-SLNs) loaded with Nar to enhance their therapeutic impact.

Methods: In vitro experiments using Rin-5F cells exposed to Nar and Nar-SLNs were carried out to investigate the protective effects of Nar and its nanoformulation against the pancreatic cancer cell line of Rin-5F.

Results: Treatment with Nar and Nar-SLN led to an increase in autophagic markers (Akt, LC3, Beclin1, and ATG genes) and a decrease in the level of miR-21. Both Nar and Nar-SLN treatments inhibited cell proliferation and reduced the expression of autophagic markers. Notably, Nar-SLNs exhibited greater efficacy compared to free Nar.

Conclusion: These findings suggest that SLNs effectively enhance the cytotoxic impact of Nar, making Nar-SLNs a promising candidate for suppressing or preventing Rin-5F cell growth.