Western blot analysis was performed on whole cell extracts (30 ug lysate) of Mouse testis (Lane 1), Rat testis (Lane 2), Mouse Stomach (Lane 3), Rat stomach (Lane 4). The blots were probed with Anti-STAT4 Mouse Monoclonal Antibody (Product# 332300, 1-3 ug/ml) and detected by chemiluminescence using Goat anti-Mouse IgG (H+L) Secondary Antibody, HRP conjugate (Product # 626520, 1:4000 dilution). A 86 kDa band corresponding to STAT4 was observed across tissue tested along with a 160 kDa extra band in Mouse Testis and Rat Testis. Known quantity of protein samples were electrophoresed using Novex® NuPAGE® 4-12 % Bis-Tris gel (Product # NP0321BOX), XCell SureLock™ Electrophoresis System (Product # EI0002) and Novex® Sharp Pre-Stained Protein Standard (Product # LC5800). Resolved proteins were then transferred onto a transferred onto a nitrocellulose membrane with Pierce™ Power Blotter System (22834). The membrane was probed with the relevant primary and secondary Antibody following blocking with 5 % skimmed milk. Chemiluminescent detection was performed using Novex® ECL Chemiluminescent Substrate Reagent Kit (Product # WP20005).
|Tested species reactivity||Human, Mouse, Rat|
|Published species reactivity||Rat, Virus, Human, Mouse|
|Host / Isotype||Mouse / IgG2a, kappa|
|Immunogen||A synthetic peptide derived form the C terminus of murine STAT4.|
|Storage buffer||PBS, pH 7.4|
|Contains||0.1% sodium azide|
|Tested Applications||Dilution *|
|ELISA (ELISA)||0.1-1.0 ug/ml|
|Gel Shift (GS)||1-5 ug/ml|
|Immunoprecipitation (IP)||5 ug|
|Western Blot (WB)||1-3 ug/ml|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
|Western Blot (WB)||See 2 publications below|
STAT4 was originally identified using degenerate primers complementary to sequences encoding conserved regions of other STAT proteins. The STAT4 protein is most similar to STAT1 (52%) and STAT3 (47%). Functionally, STAT4 is similar to other STAT family members in that it can be tyrosine phosphorylated by Jak1 or Jak2. STAT4 forms homodimers and heterodimers with related STAT family members. Tyrosine phosphorylated STAT4 can bind the IFN-gamma activated site (GAS). Serine phosphorylation of STAT is also required for maximal transcriptional activity. STAT4 expression is restricted to the thymus, spleen and testis. Until recently the cytokine(s) responsible for activation of STAT4 had not been identified. STAT4 is now known to be activated by the cytokine interleukin 12 (IL-12). IL-12 is required for the T-cell independent induction of IFN-gamma which is a key step in the initial suppression of bacterial and parasitic infections. In addition, IL-12 is required for the development of a Th1 response which is necessary for effective host defense against intracellular pathogens. STAT4-deficient mice display impaired IL-12 development of Th1 cells and enhanced development of Th2 cells. A recent study in mouse has shown that in response to viral infection IFN-a/b activation of STAT4 is required for IFN-g production.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
|Rat||Not Cited||Increased sensitivity to interferon-alpha in psoriatic T cells.||Eriksen KW,Lovato P,Skov L,Krejsgaard T,Kaltoft K,Geisler C,Ødum N||The Journal of investigative dermatology (125:936)||2005|
|Activated signal transducer and activator of transcription (STAT) 3: localization in focal adhesions and function in ovarian cancer cell motility.||Silver DL,Naora H,Liu J,Cheng W,Montell DJ||Cancer research (64:3550)||2004|