Fig 1: Infusions of nanocarriers are not associated with acute systemic toxicities.Female Sprague Dawley rats were intravenously infused with CD8-targeted IVT mRNA encoding the 1928z CAR, and a full histopathological evaluation as well as serum chemistry analysis were performed 48 h later in a blinded fashion by a board-certified pathologist. a Representative H&E-stained sections of various organs isolated from controls or nanoparticle-treated animals. Scale bars, 400 µm. b Blood counts and c serum chemistry. d ELISA measurements of serum TNF-α, IL-1β, and IL-6 cytokines. On each box plot, the central mark indicates the median, and the bottom and top edges of the box indicate the interquartile range. Whiskers represent 95% confidence intervals. Two tailed unpaired Student’s t-test. N = 5 biologically independent animals/group pooled from two independent experiments.