Human Uteroglobin/SCGB1A1 Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human Uteroglobin/SCGB1A1 in direct ELISAs.
  • Source
    Polyclonal Sheep IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    E. coli-derived recombinant human Uteroglobin/SCGB1A1
    Glu22-Asn91
    Accession # NP_003348
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Immunohistochemistry
    5-15 µg/mL
    See below
  • Neutralization
    Measured by its ability to neutralize Uteroglobin-mediated adhesion of A549 human lung carcinoma cells. The Neutralization Dose (ND50) is typically 0.3-1.2 µg/mL in the presence of 5 µg/mL Recombinant Human Uteroglobin.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Cell Adhesion Mediated by Uteroglobin and Neutralization by Human Uteroglobin Antibody. Recombinant Human Uteroglobin (Catalog # 4218-UT), immobilized onto a microplate, supports the adhesion of A549 human lung carcinoma cell line in a dose-dependent manner (orange line). Adhesion elicited by Recombinant Human Uteroglobin (5 µg/mL) is neutralized (green line) by increasing concentrations of Human Uteroglobin Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4218). The ND50 is typically 0.3‑1.2 µg/mL.
Immunohistochemistry
Uteroglobin/SCGB1A1 in Human Endometrial Cancer Tissue. Uteroglobin/SCGB1A1 was detected in immersion fixed paraffin-embedded sections of human endometrial cancer tissue using Human Uteroglobin/SCGB1A1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4218) at 3 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm of epithelial cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Uteroglobin/SCGB1A1

Uteroglobin, also called Clara cell secretory, phospholipid binding, 10 kDa or 16 kDa protein (CCSP, CCPBP, CC10 or CC16, respectively) is a small, non‑glycosylated secreted protein of the secretoglobin superfamily, (designated 1A, member 1) (1‑3). Its name is derived from its very high expression in the pre‑implantation uterus. It is produced by the non-ciliated, non-mucous secretory cells that predominate in lung bronchioles (Clara cells), and other non-ciliated epithelia that communicate with the external environment (1‑3). Expression is induced by steroid hormones such as estrogen, and enhanced by the non-steroid hormone prolactin (1). Uteroglobin is found in blood, urine and other body fluids (1). Human Uteroglobin cDNA encodes a 21 amino acid (aa) signal sequence and a 70 aa mature protein. It shares 53-56% aa identity with mouse, rat, bovine, canine, equine or rabbit Uteroglobin, and is active in mice (4). The mature protein forms a disulfide-linked head-to-tail homodimer of 16 kDa (2, 5). This homodimer is thought to form a binding pocket that binds hydrophobic ligands such as phospholipids, progesterone and retinols (5). Sequestering of prostaglandins and leukotrienes is anti-inflammatory, while sequestering of carcinogens such as polychlorinated bisphenols is anti-tumorigenic (6‑8). Other immunoregulatory activities of Uteroglobin include cell migration inhibition (by binding the chemotaxis-related formyl peptide receptor FPR2 on dendritic cells), and the inhibition of T cell differentiation to a Th2 phenotype (9). A single nucleotide polymorphism of Uteroglobin, A38G, confers increased risk of asthma (10). Transglutaminase can crosslink Uteroglobin, either to itself or to other proteins such as the adhesion molecule fibronectin (3, 11). Binding of fibronectin to Uteroglobin in the kidney is thought to protect against nephropathy, while binding of the lipocalin-1 receptor has been reported to suppress cancer cell motility and invasion (12, 13).

  • References:
    1. Mukherjee, A.B. et al. (2007) Endocr. Rev. 28:707.
    2. Singh, G. et al. (1988) Biochim. Biophys. Acta 950:329.
    3. Mantile, G. et al. (1993) J. Biol. Chem. 268:20343.
    4. Wang, S-Z. et al. (2003) J. Immunol. 171:1051.
    5. Umland, T.C. et al. (1994) Nat. Struct. Biol. 1:538.
    6. Mandal, A.K. et al. (2004) J. Exp. Med. 199:1317.
    7. Watson, T.M. et al. (2001) Am. J. Physiol. Lung Cell Mol. Physiol. 281:L1523.
    8. Yang, Y. et al. (2004) J. Biol. Chem. 279:29336.
    9. Ray, R. et al. (2006) FEBS Lett. 580:6022.
    10. Martin, A.C. et al. (2006) Am. J. Respir. Crit. Care Med. 173:617.
    11. Antico, G. et al. (2006) J. Cell Physiol. 207:553.
    12. Zheng, F. et al. (1999) Nat. Med. 5:1018.
    13. Zhang, Z. et al. (2006) Gene 369:66.
  • Entrez Gene IDs:
    7356 (Human); 22287 (Mouse); 25575 (Rat)
  • Alternate Names:
    Blastokinin; CC10; CC10Urine protein 1; CC16; CCPBP; CCSP; CCSPCCPBP; Clara cell phospholipid-binding protein; Clara cells 10 kDa secretory protein; Clara; PCB-BP; SCGB1A1; Secretoglobin family 1A member 1; secretoglobin, family 1A, member 1 (uteroglobin); UGB; UGBUP-1; UP1; Urinary protein 1; Uteroglobin
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