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5 mM GSSH; 1.5 M urea; 200 mM NaCl; 0.3 M L-Arg; glycerol 5%, pH 7.5). Then, a series dilution of scFv1C9, 200 ng/mL; 100 ng/mL; 50 ng/mL; 20 ng/mL; 10 ng/mL; 5 ng/mL, was used to test the binding activity on FGF-1 by ELISA. The immunoreaction was developed by the TMB substrate and the absorbance at 450 nm was measured with a Microplate Reader. Twenty-four http://www.selleckchem.com/products/Metformin-hydrochloride(Glucophage).html hours after transfection, cells were fixed in 4% PFA and then permeabilized in PBS containing 0.2% (v/v) Triton X-100 for 10 min. After saturation in PBS containing 2% BSA for 1 h, cells were incubated with rabbit anti-FGF-1 antibody for 1 h at room temperature. After washing, cells were incubated with Alexa Fluor 546 goat anti-rabbit IgG (H+L) for 30 min at room temperature. The nuclei were labeled with DAPI. Washed cells were embedded in glycerin and photographed by laser scanning confocal microscope (Olympus, FV1000). MCF-7 cells were co-transfected with pKH3-FGF-1 (HA-FGF-1) and pEGFP-scFv1C9, and pEGFP-C1 as control. Fourty-eight hours after transfection, the cells were lysed and total protein 1 mg were subjected http://www.selleck.cn/products/carfilzomib-pr-171.html for immunoprecipitation with mouse anti-HA antibody. Precipitations were isolated on 12% SDS PAGE and detected with anti-GFP antibody and reprobed with anti-HA antibody. Forty-eight hours after transfection, cells were fixed and permeabilized in 70% ethanol on ice for 10 Min. After washing, cells were treated with 10 ��g/mL RNase A at 37��C for 30 Min. Washed cells were incubated with 50 ��g/mL propidium iodide (PI) at room temperature for 10 Min. The GFP positive cells were subjected for cell cycle analysis. The proliferation index was calculated according the distribution of cell cycle based on the formula: proliferation index = (S + G2/M)/(S + G2/M + G1). MCF-7 cells were transfected with pKH3-FGF-1. Twenty-four hours later, transfected cells were distributed equivalently into two wells and transfected with pEGFP-C1 and pEGFP-scFv1C9, respectively. Twenty-four hours after transfection, the cells were cultured in serum free medium for 72 h. The secreted FGF-1 in serum free medium was quantitated http://www.selleckchem.com/products/BIBF1120.html using FGF-1 ELISA kit. Pure FGF-1 (1 ��g), FGF-2 (1 ��g) or total protein (50 ��g) were separated by 12% SDS�CPAGE and transferred to PVDF membrane. After blocking, blots were incubated with the primary antibody overnight at 4��C, and then were incubated with secondary antibody for 1 hour at room temperature. Immunoreactive bands were developed by the ECL kit. The antibodies used were mAb 1C9 (1:2000), mouse anti-p21 (1:200), mouse anti-actin (1:1000), HRP-conjugated goat anti-mouse IgM (1:2000) and HRP-conjugated rabbit anti-mouse IgG (1:5000). Each experiment was performed at least in triplicate. Results were expressed as the mean �� SD. Statistical analysis was performed using unpaired Student's t-test. P