All performed as reported34 , using the following reagents: the mouse monoclonal anti-PR (6A1; Cell Signaling, Beverly, MA, USA), anti-cytokeratin (C11; Santa Cruz), anti-αSMA (CGA7; Santa Cruz), anti-FAP (SS-13; Santa Cruz), anti MT-MMP-1 (SC-373908; Santa Cruz), anti-tubulin (Sigma-Aldrich), anti-FAK and anti P-Tyr397 FAK (both from BD Bioscience) antibodies; the rabbit polyclonal anti-AR (N-20; Santa Cruz), anti-ERα (HC-20; Santa Cruz), anti-vimentin (H-84; Santa Cruz), anti-FlnA (4762S; Cell Signaling) and anti-integrin β1 (Ab1952; Millipore) antibodies. The mouse monoclonal anti-AR (441; Santa Cruz) antibody was used to immune-precipitate and detect AR in Co-IP experiments. Rac pull-down assay was done20 (link), using the Rac activation kit (Upstate Biotechnology, Burlington, MA, USA). The ECL system (GE Healthcare) was used to reveal immune-reactive proteins.
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