Human STAT1 Antibody

STAT1 in HeLa Human Cell Line.

STAT1 was detected in immersion fixed HeLa human cervical epithelial carcinoma cell line using Rat Anti-Human STAT1 Monoclonal Antibody (Catalog # MAB1490) at 3 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Rat IgG Secondary Antibody (red; Catalog # NL014) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm and nuclei. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.

Detection of STAT1 in HeLa Human Cell Line by Flow Cytometry.

HeLa human cervical epithelial carcinoma cell line was stained with Rat Anti-Human STAT1 Monoclonal Antibody (Catalog # MAB1490, filled histogram) or isotype control antibody (Catalog # MAB0061, open histogram) followed by APC-conjugated Goat anti-Rat IgG Secondary Antibody (Catalog # F0113). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.

Detection of STAT1 by Western Blot

Galectin-3 expression induces activation of PYK2, STAT1 and GSK3 alpha/ beta signalling. Expression of 37 protein kinases in SW620 cells in response to 10 µg/ml galectin-3 or BSA for 0.5 h was assessed by Proteome Profiler Human Phospho-Kinase Array (A, Percentage changes of the kinases in cell response to galectin-3 in comparison to control are shown at the bottom panel). The presence of galectin-3 increases the phosphorylation of PYK2, GSK3 alpha/ beta, and STAT1 and decreases phosphorylation of STAT3. SW620 cells treated with 10 µg/ml galectin-3 for different times were assessed by immunoblotting using antibodies against p-PYK2, p-STAT-1, p-GSK3 alpha/ beta or p-STAT-3 (B). The blots were striped and reprobed with antibodies against PYK2, STAT-1, GSK3 alpha/ beta or STAT-3. The band density was quantified and expressed as percentages of phospho-/non-phosphorylated proteins (C). In D and E, SW620 cells were treated with 10 µg/ml galectin-3 or BSA followed by introduction of GSK3 alpha/ beta inhibitor SB 216763 (SB) or PKY2 inhibitor PF-431396 (PF) for 15 min and the levels of phosphorylated PYK2, STAT-1, GSK3 alpha/ beta or STAT-3 were analysed by immunoblotting. The blots were striped and reprobed with antibodies against PYK2, STAT-1, GSK3 alpha/ beta or STAT-3. The densities of the blots from three independent experiments were quantified and are expressed as the percentage of phosphorylated/non-phosphorylated levels of each protein. ***P < 0.001, **P < 0.01, *P < 0.05 (ANOVA). Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/37055381), licensed under a CC-BY license. Not internally tested by R&D Systems.