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10 protocols using phospho jak2 tyr1007 1008

1

Myricitrin Modulates Inflammatory Signaling

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Myricitrin was obtained from Aladdin Industrial Corporation (Shanghai, China). Monoclonal and polyclonal antibodies against iNOS, COX-2, JNK, phospho-JNK (Thr183/Tyr185), p38, phospho-p38 (Thr180/Tyr182), ERK1/2, phospho-ERK1/2 (Thr202/Tyr204), JAK1, phospho-JAK1 (Tyr1022/1023), JAK2, phospho-JAK2 (Tyr1007/1008), STAT1, phospho-STAT1 (Tyr701), STAT3, phospho-STAT3 (Tyr705), phospho-STAT3 (Ser727), TBP, gp91phox, Na/K ATPase-α1, and GAPDH were purchased from Cell Signaling Technology (Beverly, MA, USA). Antibody to p47phox was obtained from Santa Cruz Biotechnology (CA, USA). All secondary antibodies used for western blotting were purchased from LI-COR Biosciences (Lincoln, NE, USA). LPS (from Escherichia coli 0111:B4), NAC, and DAPI were obtained from Sigma-Aldrich (St. Louis, MO, USA). CCK-8 was purchased from KeyGen Biotech (Nanjing, JS, China). CM-H2DCFDA was obtained from Invitrogen (Carlsbad, CA, USA). Ruxolitinib and apocynin were purchased from Selleck Chemicals (Houston, TX, USA). All ELISA kits were purchased from R&D Systems China Co. Ltd. (Shanghai, China).
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2

Comprehensive Protein Analysis Protocol

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This has been performed as previously described [32 (link)]. Antibodies directed against alpha smooth muscle actin (α-SMA), Twist-1, Vimentin (RV202), N-cadherin, transforming growth factor beta 1 (TGF-β1), VEGF-A (ab46154) and IL-6 were purchased from Abcam (Cambridge, MA); Lin28B (D4H1), AKT (C73H10), p-AKT (Thr308), STAT3, pSTAT3-Tyr705 (D3A7), Snail (C15D3), E-cadherin (24E10), EpCam (UV1D9), JAK-2 (D2E12), phospho-JAK-2 (TYR1007/1008), Cyclin D1 (2922), Akt, phospho-Akt (193H12), NF-κB, ERK1/2 (137F5), phospho-ERK1/2, MMP-9, HIF-1α, Glyceraldehydes-3-phosphate dehydrogenase (GAPDH, 14C10) and β-Actin from Cell Signaling (Danvers, MA); ZEB-1 (4C4) from Abnova (Taipei, Taiwan), ALDH1A1 from Sigma (CA, USA) and IL-8 (EpR1116(2)) from Origene (Rockville, MD, USA).
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3

Western Blot Analysis of Signaling Proteins

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For western blot analysis, differentially treated cells were washed with cold PBS and then lysed in lysis buffer containing protease and phosphatase inhibitor. Insoluble cell fragments were removed by centrifugation. Cells were separated by SDS-PAGE electrophoresis and next transferred to PVDF membranes. Membranes were incubated overnight with the primary antibodies against phospho-AKT (Cell Signaling Technologies), ERK-1/2 (Cell Signaling Technologies), phosphor-ERK-1/2 (Cell Signaling Technologies), STAT3 (Cell Signaling Technologies), phospho-STAT3 (Cell Signaling Technologies), phospho-IGF-I (Cell Signaling Technologies, Danvers, MA, USA), JAK1, phospho-Jak1 (Tyr1022/1023) (Cell Signaling Technologies), JAK2 (Cell Signaling Technologies), phospho-Jak2 (Tyr1007/1008) (Cell Signaling Technologies), IGF-I Receptor β (Cell Signaling Technologies), AKT (Cell Signaling Technologies), epithelial-mesenchymal transition (EMT) antibody sampler kit (Cell Signaling Technologies). Fluorescent secondary anti-mouse (Thermo Scientific, Waltham, USA) and anti-rabbit (Thermo Scientific, Waltham, USA) antibodies were used and were detected using Odyssey Sa infrared imager (LI-COR Biosciences, Lincoln, USA).
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4

Dihydrotanshinone Modulates Cell Signaling

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Dihydrotanshinone (DHTS) was purchased from Sigma-Aldrich (USA). DHTS was dissolved in DMSO to form a concentration of 10 μM stock solution. Anti- STAT3 (#9139), Phospho- Stat3 (Tyr705) (#9145), JAK2 (#3230), Phospho-Jak2 (Tyr1007/1008) (#3771), Bax (#5023), Bcl-2 (#), Cyt C (#4280), Survivin (#2808), cleaved caspase-3 (#9661), cleaved caspase-9 (#20750), cleaved caspase-7 (#8438) were from Cell Signaling Technology (United States). The secondary antibodies were purchased from LI-COR (United States).
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5

Western Blot Analysis of Signaling Proteins

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Sample preparation of whole cell lysates, SDS-PAGE, membrane transfer and blotting were performed according to standard protocols. Antibodies to p21 (#2947), PTPN2 (TCPTP) (#58935), Jak2 (D2E12) (#3230), Phospho-Jak2 (Tyr1007/1008) (#3771), Stat3 (D1B2J) (#30835), phospho-Stat3 (Tyr705) (D3A7) (#9145), Stat5 (D3N2B) (#25656), phospho-Stat5 (Tyr694) (D47E7) (#4322), MDM2 (D1V2Z) (#86934), α-Tubulin (#2144) and GAPDH (#5174) were purchased from Cell Signaling Technologies. Antibody to TP53 (sc-47698) and MDMX (G-10) (sc-74467) were purchased from Santa Cruz Biotechnology. Antibodies were used at 1:1000 dilution (Cell Signaling Technologies) or at 1:500 dilution (Santa Cruz Biotechnology).
Uncropped western blots from the main figures are provided in Supplementary Figure 8.
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6

JAK2 Pathway Protein Analysis

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Protein amounts in cells with exogenous or endogenous JAK2 variants were assessed using standard protocols for western blotting. The antibodies used were the following: JAK2 (Cell Signaling, #74987S), phospho-JAK2 Tyr1007/1008 (Cell Signaling, #3771S), STAT5 (Cell Signaling, #25656), pSTAT5 Tyr694 (Cell Signaling, #9359), STAT3 (Cell Signaling, #4904), pSTAT3 Tyr705 (Cell Signaling, #9145), and β-ACTIN (Santa Cruz, sc-47778).
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7

Immunoblotting analysis of signaling pathways

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Whole cell lysates were prepared for immunoblotting as described previously [23 (link)–25 (link)]. Equal amounts of total proteins (30 μg) were subjected to SDS-PAGE, transferred onto nitrocellulose, and immunoblotted with specific antibodies. The primary antibodies against phospho-STAT3 (Tyr705), STAT3, phospho-JAK2 (Tyr1007/1008), JAK2, PARP, MCL1, XIAP, Cox2 and iNOS were purchased from Cell Signaling Technology (Danvers, MA). Anti-β-Actin, anti-α-Tublin, anti–mouse IgG and anti–rabbit IgG horseradish peroxidase conjugated antibodies were purchased from Santa Cruz (Santa Cruz, CA). Anti-Myc antibody was purchased from Medical & Biological Laboratories (Tokyo, Japan). Anti-GAPDH antibody was purchased from Abgent (Suzhou, China).
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8

Molecular Mechanisms of PPII in Cancer

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The primary antibodies against LC3B, Src, phospho-Src (Tyr416), JAK2, phospho-JAK2 (Tyr1007/1008), STAT3, phospho-STAT3 (Tyr705), PI3K, phospho-PI3K, AKT, phospho-AKT, mTOR, phospho-mTOR, p53, p21, CDC2, cyclin B1, cyclin A2, Mcl-1, Bcl-XL, poly (ADP-Ribose) polymerase (PARP), and β-actin were purchased from Cell Signaling Technology (Beverly, MA, USA). Dimethyl sulfoxide (DMSO), 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium bromide (MTT), and 5-fluorouracil (5-FU) were purchased from Sigma Company (St. Louis, MO, USA). PPII (purity of ≥ 98%, as determined by HPLC) was bought from Chengdu Must Bio-Technology Co. Ltd. (Chengdu, China). The chemical structure of the PPII is shown in Figure 1A.
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9

Immunoblotting Analysis of Cellular Markers

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This has been performed as previously described [18 (link)]. Antibodies directed against alpha smooth muscle actin (α-SMA), Ki-67, transforming growth factor beta 1 (TGF-β1), Stromal-derived factor-1 (SDF-1), Twist-1, Vimentin (RV202), MMP-9, (ab38898), ATR (ab54793), N-cadherin and interleukin-6 (IL-6) were purchased from Abcam (Cambridge, MA); STAT3, pSTAT3-Tyr705 (D3A7), Snail (C15D3), E-cadherin (24E10), EpCAM (UV1D9), JAK-2 (D2E12) and phospho-JAK-2 (TYR1007/1008), CyclinD1 (2922), Akt, phospho-Akt (193H12), MMP-2 (4022), ERK1/2 (137F5) and phospho-ERK1/2 from Cell Signaling (Danvers, MA); ZEB-1 (4C4) from Abnova (Taipei, Taiwan); p21 (F-5), p53 (DO-1) and Glyceraldehydes-3-phosphate dehydrogenase (GAPDH, FL-335) were purchased from Santa Cruz (Santa Cruz, CA).
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10

Molecular Mechanisms of Erythropoietin Signaling

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Recombinant human EPO (rhEPO) was purchased from Sunshine Pharmaceutical (Shenyang, China). Lipopolysaccharide (LPS from Escherichia coli 055:B5) was purchased from Sigma–Aldrich (St. Louis, MO, United States). EPO mimetic peptide 9 (EMP9, an EPOR antagonist) was synthesized by Fenghui Biotechnology (Changsha, China). Fedratinib (a JAK2 inhibitor), NSC 74859 (a STAT3 inhibitor), and BAY 11-7082 (an NF-κB inhibitor) were from MedChemExpress (Deer Park Dr, NJ, United States). The interleukin-1β (IL-1β), interleukin-18 (IL-18), myeloperoxidase (MPO) enzyme-linked immunosorbent assay (ELISA) kits, and anti-IL-1β antibody (catalog no. AF-401-NA) were from R&D Systems (Minneapolis, MN). Antibodies against phospho-NF-κB p65 (Ser536, catalog no. 3033S), NF-κB p65 (catalog no. 8242S), phospho-STAT3 (Tyr705, catalog no. 9145S), STAT3 (catalog no. 9139S), phospho-JAK2 (Tyr1007/1008), and JAK2 were obtained from Cell Signaling Technology (Beverly, MA, United States). Anti-Caspase-1 (catalog no. AG-20B-0042-C100), anti-NLRP3 (catalog no. AG-20B-0006-C100), and anti-ASC antibodies (catalog no. AG-25B-0006-C100) were from AdipoGen (San Diego, CA, United States).
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