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4 protocols using fitc conjugated donkey anti mouse antibody

1

HER2 Expression Analysis in Cancer Cells

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The U-87 MG and SK-BR-3 cells were trypsinized, washed three times with PBS, and incubated for 1 h with (ZHER2:4)2DCS-FITC at the concentrations of 0.03, 0.3, and 3.0 μM. As a control, the cells were incubated for 1 h with mouse monoclonal anti HER-2 antibody (AbD Serotec, Bio-Rad, Hercules, CA, USA), washed three times with PBS, and again incubated for 1 h with FITC-conjugated donkey anti-mouse antibody (Jackson Immuno Research, West Grove, PA, USA). Cells were washed three times with PBS and fixed with 1% paraformaldehyde, following their analysis on a FACSDiva instrument (BD Biosciences, Franklin Lakes, NJ, USA). The obtained results were analyzed using WinMidi software (Purdue University, West Lafayette, IN, USA).
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2

Quantification of DNA Double-Strand Breaks

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DNA DSBs were quantified in spatially (three-dimensionally = 3D) fixed cells by the means of high-resolution ICM detection of co-localized γH2AX and 53BP1 repair foci as described earlier [16 (link),20 (link)]. Briefly, cells were fixed with 4% paraformaldehyde (10 min, at room temperature RT) prior to irradiation (0 min PI, non-irradiated controls) and in several time points PI covering a long (48 h) PI period (5 min, 30 min, 1 h, 2 h, 4 h, 8 h, 24 h and 48 h PI). Cells were permeabilized in 0.2% Triton X-100/PBS (15 min, RT) and immunoassayed with mouse antiphospho-H2AX (serine 139) (Merck, Darmstadt, Germany, cat. no.: 05-636) and rabbit anti-53BP1 (Cell Signaling Technology, Danvers, MA, USA, cat. no.: 4937) primary antibodies to simultaneously detect the γH2AX and 53BP1. Antiphospho-H2AX antibody was visualized with the secondary FITC-conjugated donkey anti-mouse antibody and anti-53BP1 antibody with Cy3-conjugated donkey anti-rabbit antibody (both Jackson Laboratory, West Grove, PA, USA, cat. no.: 715-095-150 and 711-165-152). Chromatin was counterstained with 1 μM TO-PRO-3 (Molecular Probes, Eugene, OR, USA) prepared in 2× saline sodium citrate (SSC). After brief washing in 2× SSC, Vectashield medium (Vector Laboratories, Burlington, Ontario, Canada) was used for sample mounting.
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3

Immunofluorescence analysis of RAGE and MAPK

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Cells were grown overnight on coverslips in complete medium at 37°C followed by serum starvation for 16 hours. PR3 (0.5 μg/mL) was added to the cells for 30 min at 37°C. After washes, cells were fixed in 4% paraformaldehyde (PFA) for 10 min at room temperature (RT), permeabilized with 0.1% saponin, 0.1% BSA in TBS (30 min) and blocked with 1% BSA/TBS for 1 h at RT. Staining was performed with anti-RAGE antibody (Abcam) at 1 μg/mL, rabbit anti-PR3 antibody (Novus Biologicals) at 2 μg/mL, mouse monoclonal phospho-p44/42 (Thr202/Tyr204) E10 antibody (Cell Signaling) at 5 μg/mL, or rabbit anti-phospho-JNK (T183/Y185) antibody (R&D Systems) at 2 μg/mL. Secondary FITC-conjugated donkey anti-mouse antibody was used at 5 μg/mL and Cy3-conjugated goat anti-mouse or mouse anti-rabbit antibodies were used at 2.5 μg/mL (Jackson ImmunoResearch Laboratories). DNA was stained with Hoeschst 33258 (Sigma) or DAPI VectaShield (Vector Laboratories). Images were captured with an IX70 fluorescence microscope (Olympus) and confocal Leica TCS SP8.
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4

Immunofluorescence Analysis of Trigeminal Ganglia

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For immunofluorescence analysis, rats were deeply anesthetized with sodium pentobarbital (80 mg/kg, i.p.) and transcardially perfused them with 100 ml of heparinized normal saline, followed by 500 ml freshly prepared fixative containing 4% (w/v) paraformaldehyde in 0.1 M phosphate buffer (pH 7.4). The TG sections were permeabilized with 50% ethanol for 30 min, blocked with 10% normal donkey serum (NDS) for 30 min, and incubated overnight in the primary antibodies [goat polyclonal antibody to GRP78 (sc1050, 1:200, Santa Cruz Biothechnology), rabbit monoclonal antibody to p-eIF2α (#3597, 1:500, Cell Signaling) and the neuronal marker, microtubule associated protein (MAP2; #ab11267, 1:1,000, Abcam)]. TG sections were washed with 0.01 M phosphate buffered saline (PBS, pH 7.4) and incubated with 2% NDS for 30 min, and incubated with secondary antibodies [Cy3-conjugated-donkey anti-goat antibody, Cy3-conjugated-donkey anti-rabbit antibody and FITC-conjugated-donkey anti-mouse antibody (1:200 in PBS; Jackson Immunoresearch)] for 3 h. Finally, sections were rinsed with PBS, mounted on slides, and coverslipped with Vectashield (Vector, Burlingame, CA) solution. Microscopic observation was performed with an Exi digital camera (Q-Imaging Inc, Surrey, CA) attached to a Zeiss Axioplan 2 conventional fluorescence microscope (Carl Zeiss Inc, Jena, Germany).
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