KRAS and neoplasm: Aiming to improve tumor response and regression, Xue et al. proposed lipid/polymer nanocarriers composed of 7C1 (i.e., PEI-C15 carbon lipid) mixed with C14PEG2000 for concurrent delivery of miR-34a and siKRAS, to restore the p53-regulated tumor suppressor mRNA levels in lung tumor and reduce KRAS gene expression.