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3 protocols using anti phospho tyrosine 705 stat3

1

Quantitative Gene and Protein Expression Analysis in Murine Hearts

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Total RNA from adult murine hearts was isolated with Trizol (Invitrogen) and cDNA synthesis was performed as described previously.21 (link),22 (link) Real-time PCR with SYBR green dye method (Brilliant SYBR Green Mastermix-Kit, Thermo Fisher) was performed with the AriaMx Real-Time PCR System (Agilent Technologies) as described.21 (link),22 (link) List of qRT-PCR primers used in this study is provided below. Expression of mature miR-146a was determined using miR-qRT-PCR on an ABI7500 cycler (Applied Biosystems, Foster City, USA) and was normalized using the 2-ΔΔCT method relative to U6 as described.23 (link)

Sequences of qRT-PCR primers

mRNASense primers (5’ to 3’)Antisense primers (5’ to 3’)
mmu 18SGTAACCCGTTGAA CCCCATTCCATCCAATCGGTA GTAGCG
mmu ANPGCCGGTAGAAGA TGAGGTCAGGGCTCCAATCCT GTCAATC
mmu α-MHCGGAAGAGCGAGC GGCGCATCAAGGGTCTGCTGGAGAGGT TATTCCTCG
mmu β-MHCCAAGTTCCGCA AGGTGCAAATTGCTTTATTCTG CTTCCAC
mmu Col1a1ACAGACGAACAAC CCAAACTGGTTTTTGGTCACG TTCAGT
Protein expression levels were determined by Western blotting, using SDS-PAGE as previously described.20 (link) The following antibodies were used: Anti-ErbB2, anti-ErbB4, anti-MMP2, anti-phospho-Tyrosine 705-STAT3, anti-STAT3, anti-phospho-Tyrosine 694 STAT5 and anti-STAT5 (Cell Signalling Technology), anti-MMP3 and anti-MMP9 (Abcam).
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2

STAT3 Activation in TH17 Cells

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B6 CD4+ T cells were cultured under TH17 polarizing conditions for 5 d in presence of anti-CD3 and irradiated, T cell-depleted splenocytes. Following Ficoll separation to isolate viable cells, T cells were rested in neutral media and restimulated with IL-6 (20 ng/ml), IL-1β (20 ng/mL) or IL-21 (20 ng/ml) for the indicated times. Cell lysates were prepared in lysis buffer (RIPA buffer; 50 mM Tris-HCl pH?, 150 mM NaCl, 1 mM EDTA, 1% Triton X-100, 1% sodium deoxycholate, 0.1% SDS) containing a protease & phosphatase inhibitor mixture (Pierce). Protein was quantified by Bradford Assay before equivalent amounts were separated by SDS-PAGE and transferred to a PVDF membrane (Millipore). Primary antibodies were: anti-STAT3 (Cell Signaling #9132), anti-phospho-tyrosine(705)-STAT3 (Cell signaling Technology #9145), or anti-phospho-serine(727)-STAT3 (Cell signaling Technology #9134). HRP-cojugated Donkey anti-rabbit or HRP-conjuaged anti-mouse antibody (Affinity Bioreagents) were used to detect target protein by ECL detection kit (GE Healthcare or Pierce SuperSignal Dura).
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3

STAT3 Activation in TH17 Cells

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B6 CD4+ T cells were cultured under TH17 polarizing conditions for 5 d in presence of anti-CD3 and irradiated, T cell-depleted splenocytes. Following Ficoll separation to isolate viable cells, T cells were rested in neutral media and restimulated with IL-6 (20 ng/ml), IL-1β (20 ng/mL) or IL-21 (20 ng/ml) for the indicated times. Cell lysates were prepared in lysis buffer (RIPA buffer; 50 mM Tris-HCl pH?, 150 mM NaCl, 1 mM EDTA, 1% Triton X-100, 1% sodium deoxycholate, 0.1% SDS) containing a protease & phosphatase inhibitor mixture (Pierce). Protein was quantified by Bradford Assay before equivalent amounts were separated by SDS-PAGE and transferred to a PVDF membrane (Millipore). Primary antibodies were: anti-STAT3 (Cell Signaling #9132), anti-phospho-tyrosine(705)-STAT3 (Cell signaling Technology #9145), or anti-phospho-serine(727)-STAT3 (Cell signaling Technology #9134). HRP-cojugated Donkey anti-rabbit or HRP-conjuaged anti-mouse antibody (Affinity Bioreagents) were used to detect target protein by ECL detection kit (GE Healthcare or Pierce SuperSignal Dura).
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