Antibodies against the urokinase receptor and their use

Details Antibodies against the urokinase receptor and their use Antibodies against the urokinase receptor and their use

C - Chemistry, Metallurgy

12

P

C12P 21/08 (2006.01) A61K 31/185 (2006.01) A61K 39/395 (2006.01) C07K 14/705 (2006.01) C07K 16/28 (2006.01) C12Q 1/02 (2006.01) G01N 33/566 (2006.01) G01N 33/573 (2006.01) G01N 33/574 (2006.01) G01N 33/577 (2006.01) G01N 33/86 (2006.01) A61K 38/00 (2006.01) A61K 49/02 (1990.01)

Patent

CA 2094276

A monoclonal or polyclonal antibody directed against urokinase plasminogen activator receptor (u-PAR), or a subse- quence, analogue or glycosylation variant thereof. Antibodies are disclosed,which react with free u-PAR or with complexes be- tween u-PA and u-PAR and which are capable of 1) catching u-PAR in ELISA, or 2) detecting u-PAR, e.g. in blotting, or 3) in radioimmunoprecipitation assay precipitate purified u-PAR in intact or fragment form, or 4) is useful for immunohistochemical detection of u-PAR, e.g. in immunostaining of cancer cells, such as in tissue sections at the invasive front, or 5) inhibits the bind- ing of pro-u-PA and active u-PA and thereby inhibits cell surface plasminogen activation. Methods are disclosed 1) for detecting or quantifying u-PAR, 2) for targeting a diagnostic to a cell containing a u- PAR on the surface, 3) for preventing or counteracting proteolytic activity in a mammal. Methods for selecting a substance suitable for inhibiting u-PA/u-PAR interaction, for preven- ting or counteracting localized proteolytical activity in a mammal, for inhibiting the invasion and/or metastasis comprise the use of the antibodies and of nude mice inoculated with human cancer cells which are known to invade and/or metastasize in mice and having a distinct colour, f.x. obtained by means of an enzyme and a chromogenic substrate for the enzyme, the colour being different from the cells of the mouse.

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