“…Moreover, the prominent siRNA signal detected in tumor, the high signals in kidney are consistent with our previous publications that major clearance route of this nanoparticle is kidney [ 51 ]. We also detected some siRNA signal in the liver, lung, and brain, which may be due to lymphoma associated inflammation in central nervous system [ 57 , 58 , 59 , 60 , 61 ] and other organs. Because our previous studies have shown that this delivery system spares health brain [ 45 ], lung [ 50 ], and other organs/tissues, and is not cleared appreciably by a healthy liver [ 51 ], the present results support the observation that this nanomaterial permeates leaky vasculature associated with tumoral and inflammatory microenvironment.…”