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Cytotoxicity of nanoliposomes. Primary cultures of rat embryo cortical neurons were incubated in medium containing the indicated concentrations of nanoliposomes on day 3 in vitro. After 24 h, MTT assay was performed to assess cell viability. Mean and SD are shown for quadruplicate determinations. Statistical significance is shown as compared to that obtained for cells incubated in absence of nanoliposomes (* p < 0.05, ** p < 0.01).
