STAT1 is a member of the Signal Transducers and Activators of Transcription family of transcription factors. STAT1 is involved in upregulating genes due to a signal by either type I, type II, or type III interferons. In response to IFN-γ stimulation, STAT1 forms homodimers or heterodimers with STAT3 that bind to the GAS (Interferon-Gamma-Activated Sequence) promoter element; in response to either IFN-α or IFN-β stimulation, STAT1 forms a heterodimer with STAT2 that can bind the ISRE (Interferon-Stimulated Response Element) promoter element. The phosphorylated STATs dimerize and associate with ISGF3G/IRF-9 to form a complex termed ISGF3 transcription factor that enters the nucleus. ISGF3 binds to the IFN stimulated response element (ISRE) to activate the transcription of IFN-stimulated genes (ISG), which drive the cell in an antiviral state. In response to type II IFN (IFN-gamma), STAT1 is tyrosine- and serine-phosphorylated.
背景文献
1. Clark DN et al. Unique aspects of IFN-γ/STAT1 signaling in neurons. Immunol Rev. 2022 Oct
2. Butturini E et al. Redox Regulation of STAT1 and STAT3 Signaling. Int J Mol Sci. 2020 Sep
Western blot analysis of STAT1 on different lysates with Mouse anti-STAT1 antibody (HA601309) at 1/1,000 dilution.
Lane 1: Jurkat cell lysate Lane 2: A431 cell lysate Lane 3: HeLa cell lysate Lane 4: A549 cell lysate Lane 5: SK-Br-3 cell lysate Lane 6: SK-MEL-28 cell lysate Lane 7: MCF7 cell lysate Lane 8: HT-29 cell lysate
Lysates/proteins at 15 µg/Lane.
Predicted band size: 87/83 kDa Observed band size: 87/83 kDa
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA601309) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Mouse IgG - HRP Secondary Antibody (HA1006) at 1/50,000 dilution was used for 1 hour at room temperature.
Western blot analysis of STAT1 on different lysates with Mouse anti-APE1 antibody (HA601309) at 1/1,000 dilution.
Lane 1: PATU8988-parental cell lysate Lane 2: PATU8988-STAT1 KD cell lysate
Lysates/proteins at 10 µg/Lane.
Predicted band size: 87/83 kDa Observed band size: 83 kDa
Exposure time: 15 seconds; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA601309)) at 1/1,000 dilution was used in primary antibody dilution (K1803) at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Immunohistochemical analysis of paraffin-embedded human breast cancer tissue with Mouse anti-STAT1 antibody (HA601309) at 1/1,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0) (high pressure) for 2 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA601309) at 1/1,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunohistochemical analysis of paraffin-embedded human spleen tissue with Mouse anti-STAT1 antibody (HA601309) at 1/1,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0) (high pressure) for 2 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA601309) at 1/1,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
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