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We develop multidrug-loaded cubosome and spongosome lipid nanoparticles for targeting of endoplasmic reticulum stress as a potential emerging therapeutic strategy against neuronal degeneration. The multicompartment organization of the liquid crystalline nanoparticles (LCNPs), fabricated by self-assembly, was characterized by cryogenic transmission electron microscopy (cryo-TEM) and small-angle X-ray scattering (SAXS). Monoolein-based cubosome and spongosome LCNPs co-encapsulated the natural plant-derived antioxidant curcumin, fish oil rich in ω-3 polyunsaturated fatty acids (PUFA), and the neurotrophin brain-derived neurotrophic factor (BDNF), which is of vital need for neurogenesis. The neuroprotective properties of the nanoparticles were in vitro investigated in a cellular model of tunicamycin-induced endoplasmic reticulum (ER) stress using differentiated human neuroblastoma SH-SY5Y cells …