Anti-HLA-G Purified

EXBIO

Mouse Monoclonal to HLA-G

7

The mouse monoclonal antibody 4H84 recognizes an extracellular epitope of HLA-G molecule (39 kDa). HLA-G belongs to the MHC Class I molecules (MHC Class Ib; nonclassical) and it is expressed on the surface of trophoblast cells.

Immunohistochemistry (paraffin sections): Recommended dilution: 10 microg/ml. ELISA: The antibody 4H84 has been tested as the capture antibody in a sandwich ELISA for analysis of heavy chains of all HLA-G isoforms in combination with antibody MEM-G/1 (cat. no. 1B-291-C100). Flow cytometry: Recommended dilution: 2-5 microg/ml. Intracellular staining or surface staining after acid treatment (Polakova K. et al. Molecular immunology 1993; 1223-30). Western blotting: Recommended dilution 1-2 microg/ml.

Flow Cytometry, ImmunoPrecipitation, Western Blot, ELISA, ImmunoCytoChemistry, ImmunoHistoChemistry, ImmunoHistoChemistry Frozen, ImmunoHistoChemistry Paraffin

Research Use Only

4H84

1 mg/ml

IgG1

Human leukocyte antigen G (HLA-G), belonging to MHC class I glycoproteins, plays important roles in both physiological and pathological immunotolerance. It gives an inhibitory signal to cytotoxic T cells, NK cells, monocytes, and some other immune cells. It also induces regulatory T cells and anti-inflammatory macrophages. HLA-G is important e.g. for maternal tolerance to the fetus, and for immunomodulation in particular adult tissues, such as in cornea, pancreatic islets, thymus and other. On the other hand, it is expressed in many solid and hematologic malignancies, where it contributes to evasion of the immune surveillance. HLA-G expression pattern in cancer is an important prognostic factor regarding a poor clinical outcome. Unlike most other MHC glycoproteins, HLA-G acts as an immune checkpoint molecule rather than as an antigen presenting molecule. It concerns both transmembrane and soluble HLA-G isoforms. Among other, HLA-G can promote Th2 immunological response and downregulate Th1 immunological response. For its benefits regarding allograft tolerance, including embryo implantation, soluble HLA-G (sHLA-G) can be used as a marker of developmental potential of embryos during the process of in vitro fertilization. Similarly, sHLA-G concentrations in maternal serum are decreased in preeclampsia. Transplanted patients with increased sHLA-G serum levels have improved allograft acceptance. On the other hand, increased sHLA-G can also indicate presence of malignant (sometimes also of benign) tumor cells. Another important topic is induction of HLA-G expression (sometimes associated with shedding of HLA-G from the cell surface) by some anti-cancer or anti-viral therapies, which can weaken the therapy effect. Monitoring of HLA-G in patients thus has a wide usage.

Human

2°C to 8°C

12352203