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9 protocols using stat5

1

Immunoblotting analysis of STAT5 phosphorylation

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Cells were suspended in Laemmli’s 2× buffer (Bio-Rad, Hercules, CA, USA), separated on SDS/PAGE and blotted onto nitrocellulose membrane. Blots were incubated with the following antibodies (Abs): P-Y694/699-STAT5, Actin (Cell Signaling Technology, Danvers, MA, USA), STAT5 (BD Transduction Laboratories, Franklin Lakes, NJ, USA), STAT5A and STAT5B (Zymed/ThermoFisher Scientific, Waltham, MA, USA). Membranes were developed with the ECL chemiluminescence detection system (GE Healthcare, Little Chalfont Buckinghamshire, UK) using specific peroxidase (HRP) conjugated to rabbit or mouse IgG antibodies (Cell Signaling Technology).
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2

Protein Immunoblotting Protocol

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NP40 cell lysates (1% NP40, 10% glycerol, 0.05 M Tris pH 7.5, 0.15 M NaCl, 1 mM PMSF, protease and phosphatase Inhibitor cocktails) (Roche and Thermo Scientific, respectively) were resuspended in Laemmli's 2x buffer, separated on SDS/PAGE and blotted onto nitrocellulose membrane (GE Healthcare, Little Chalfont, United Kingdom). Blots were incubated with the following antibodies (Abs): P-Y694/699-STAT5, catalase (Cell Signaling Technology, Danvers, United States), STAT5 (BD Transduction Laboratories, Franklin Lakes, United States), actin (Santa Cruz, Dallas, United States), Flag M2 (Stratagene, Santa Clara, United States), Glutaredoxin1 (Glrx1) (R&D, Minneapolis, United States). Membranes were developed with the ECL chemiluminescence detection system (GE Healthcare, Little Chalfont, United Kingdom) using specific peroxidase (HRP) conjugated to rabbit or mouse IgG antibodies (Cell signaling Technology, Danvers, United States) or goat IgG (Santa Cruz, Dallas, United States).
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3

BCR-ABL1 Signaling Pathway Analysis

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Ba/F3 cells expressing native or mutant BCR-ABL1 or primary CML patient cells were cultured for 4–6 hr in standard medium alone or with escalating concentrations of TKI(s), followed by lysis and boiling for 10 min in SDS-PAGE loading buffer. Lysates were separated on 4–15% Tris-glycine gels, transferred, and immunoblotted with antibodies for the BCR N-terminus (3902; Cell Signaling), phospho-ABLl (Y393 [1a numbering]; 2865; Cell Signaling), ABL1 (554148; BD Biosciences), phospho-CRKL (Tyr207) (3181S; Cell Signaling), phospho-STAT5 (Tyr694) (9351S; Cell Signaling), STAT5 (610192; BD Biosciences), β-actin (2691430; Millipore) and/or β-tubulin (05–66; Millipore).
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4

Antibody Validation for Signaling Pathways

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Antibodies used were HA (SC-805, Santa Cruz, Dallas, TX), HA-7-HRP (H6533, Sigma-Aldrich), MEK1/2 (#9126, Cell Signaling, Danvers, MA), phospho-MEK1/2 (#2338, Cell Signaling), ERK1/2 (M5670, Sigma-Aldrich), phospho- ERK1/2 (#4370, Cell Signaling), STAT5 (610191, BD Biosciences, Franklin Lakes, NJ), phospho-STAT5A/B (05–886R, Merck Millipore), phospho-p70 S6 kinase (#9234, Cell Signaling), p70 S6 kinase (SC-230, Santa Cruz), RIPK3 (#12107, Cell Signaling), HSP90 (610418, BD Transduction Laboratories), actin (AAN01-A, Cytoskeleton, Denver, CO), and tubulin (ab7291, Abcam, Cambridge, UK). The secondary antibodies used were goat anti-mouse HRP (115–035-003, Jackson ImmunoResearch, West Grove, PA), goat anti-rabbit HRP (111–035-003, Jackson ImmunoResearch), and Alexa Fluor 680 goat anti-mouse (A-21057, Molecular probes, Grand Island, NY).
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5

Immunoblotting of STAT Proteins

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Total cell lysates were prepared in lysis buffer (20 mM Hepes, pH 7.4, 20 mM NaCl, 10% Glycerol, and 1% Triton X-100) and protease and phosphatase inhibitor cocktails (CalBiochem). Blots were probed with antibodies that are specific for p-STAT1 (Y701, BD Biosciences), STAT1 (BD Biosciences), STAT2 (Santa Cruz), STAT3 (BD Biosciences), STAT4 (Santa Cruz), STAT5 (BD Biosciences), STAT6 (BD Biosciences), GAPDH (Santa Cruz), and β-actin (sigma).
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6

Immunoblot Analysis of Cellular Proteins

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Immunoblots were performed according to [11 (link)]. For each membrane, a housekeeping protein is depicted (HSP90, GAPDH, vinculin), which is always shown underneath the detected proteins of interest. Antibodies were: BCL-XL (#ab32370), GAPDH (#ab128915), WT1 (#ab89901) from Abcam, Cambridge, U.K.; RAF1 (#sc-133), HSP90 (#sc-13119), vinculin (#sc-736), ɣH2AX (#sc-101696) from Santa Cruz, Heidelberg, Germany; cleaved caspase-3 (#cs9661), p-Tyr202/Tyr204-ERK1/ERK2 (#cs9101), ERK1/ERK2 (#cs9102) from Cell Signaling, Leiden, Netherlands; p-Tyr694-STAT5 (#MA5-14973) from Thermo Fisher, Braunschweig, Germany; STAT5 (#610192) from BD Bioscience, Heidelberg, Germany; and PARP1 (#556362) from Pharmingen, Heidelberg, Germany. The protein ladders used were the prestained ScientificTM PageRulerTM (#26617) and the PageRulerTM Plus (#26620) from Thermo Fisher, Braunschweig, Germany.
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7

Immunoblotting Antibody Panel for AML

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Primary antibodies used for immunoblotting included NOX4 (Ab109225; Abcam; used for human primary AML samples), NOX4 (NB110-58849; Novus Biologicals; used for all other analyses), p22phox (#SC20781; Santa Cruz Biotechnology), β-Actin (A5441), α-Tubulin (T5168) (Sigma), Vinculin (BZL03106; Biozol), NUP98 (Ab179911 (13C1)), Histone H3 (Ab1220), Calreticulin (Ab22683), KDEL (Ab12223) (Abcam), GAPDH (#5174), Lamin A/C (#2032), HDAC1 (#5356), pAKT (Ser473; #9271), AKT(#9272), pERK1/2 (Thr202/Tyr204; #9106), ERK1/2 (#4696), pGSK3β (Ser9; #9336), GSK3β (#9315) (Cell Signaling), pSTAT5 (Tyr694/699; #04-886; Millipore), STAT5 (#610191; BD Biosciences) and HA (#MMS-101R; Cambridge Bioscience).
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8

Antibodies Used in Cell Signaling

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Antibodies used were HA (SC-805, Santa Cruz, Dallas, TX, USA), HA-7-HRP (H6533, Sigma-Aldrich), MEK1/2 (#9126, Cell Signaling, Danvers, MA, USA), phospho-MEK1/2 (#2338, Cell Signaling), ERK1/2 (M5670, Sigma-Aldrich), phospho- ERK1/2 (#4370, Cell Signaling), STAT5 (610191, BD Biosciences, Franklin Lakes, NJ, USA), phospho-STAT5A/B (05-886R, Merck Millipore), phospho-p70 S6 kinase (#9234, Cell Signaling), p70 S6 kinase (SC-230, Santa Cruz), RIPK3 (12107, Cell Signaling), HSP90 (610418, BD Transduction Laboratories), actin (AAN01-A, Cytoskeleton, Denver, CO, USA), and tubulin (ab7291, Abcam, Cambridge, UK). The secondary antibodies used were goat anti-mouse HRP (115-035-003, Jackson ImmunoResearch, West Grove, PA, USA), goat anti-rabbit HRP (111-035-003, Jackson ImmunoResearch), and Alexa Fluor 680 goat anti-mouse (A-21057, Molecular probes, Grand Island, NY, USA).
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9

Western Blot for Phospho-Protein Analysis

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Protein lysate was resolved by 12% sodium dodecyl sulfate-polyacrylamide gel electrophoresis and transferred to a polyvinylidene difluoride membrane. The following Abs were used for immunoblotting: rabbit monoclonal Abs to phospho (p)-Akt (Ser473), Akt, extracellular signal-regulated kinases (Erk), p-Erk (Thr202/Tyr204) (all from Cell Signaling Technology, Danvers, MA, USA), p-STAT5 (EMD Millipore, Billerica, MA, USA), and STAT5 (BD Biosciences). The membranes were stained with appropriate Abs and visualized using SuperSignal West Femto Chemiluminescent Substrate (Thermo Fisher Scientific, Fremont, CA, USA).
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