A method of labelling a cell is provided. Aspects of the method include the contacting the cell with a cholesteryl-cargo conjugate having the formula: C-L-Z (I) wherein C is a cholesterylamine anchor group, L is an optional linker and Z is a linked cargo moiety to non-covalently bind the cholesterylamine anchoring group to the cell membrane thereby displaying Z at the cell surface for an extended period of time. Aspects of the method further include administering the labelled cell to a subject. Also provided is a method of modulating an immune response in a subject and a method of targeting a cell in a subject. Cholesterylamine conjugates, labelled cells and kits including the same that fmd use in the subject methods are also provided.
