A cysteine (Cys) residue was synthetically appended to the C-terminal of the TLR2 targeting peptide, resulting in an amino acid sequence represented as His-Leu-Tyr-Val-Ser-Pro-Trp-Cys. TLR2 targeting peptide was co-incubated and conjugated to the orid-liposome-MAL. The drugs named as 1:1 and 5:1 differed only in the amount of TLR2 pep. TLR2 pep-orid-liposome 1:1 represents the molar ratio of 1:1 for oridonin: TLR2 peptide, whereas 5:1 for TLR2 pep-orid-liposome 5:1. Dialysis was performed to eliminate any excess free peptide post-incubation.
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