The present invention relates to the targeted delivery of a delivery
vehicle construct which specifically binds to and stimulates endocytosis
into cells expressing the urokinase plasminogen activator receptor
(uPAR), and particularly human airway epithelia. The delivery vehicle
construct comprises a portion of uPA and a cargo linked thereto and is
useful for the targeted delivery of the cargo to a cell. In one aspect of
the invention, the uPA portion of the delivery vehicle construct
comprises the wild-type uPA, a fragment of uPA which has the PAI-1
binding region deleted, or a uPA peptide comprising amino acids 13 19 and
is useful for the targeted delivery of the cargo to cells, and in
particular to airway epithelia. The present invention also provides a
method for delivering the delivery vehicle construct to a cell. The
method comprises the steps of (a) contacting a target cell with a
delivery vehicle construct comprising a uPA portion and a cargo portion;
and (b) obtaining a desired result in the target cell.