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Key Product Details

Validated by

Biological Validation

Species Reactivity

Validated:

Human

Cited:

Human

Applications

Validated:

Immunocytochemistry/ Immunofluorescence, Immunohistochemistry, Immunohistochemistry-Frozen, Immunohistochemistry-Paraffin, Western Blot

Cited:

IF/IHC, Immunocytochemistry/ Immunofluorescence, Immunohistochemistry, Immunohistochemistry-Paraffin, Western Blot

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG1 Clone # MEM-G/1

Format

BSA Free

Concentration

1 mg/ml

Product Specifications

Immunogen

HLA-A2.1/human beta2-microglobulin double transgenic mice were immunized with murine L cells transfected with both human beta2-microglobulin and HLA G Antibody (G233)

Localization

Cell Membrane

Specificity

The antibody MEM-G/1 reacts with denaturated HLA-G heavy chain. HLA-G belongs to the MHC Class I molecules (MHC Class Ib; nonclassical) and it is expressed on the surface of trophoblast cells.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Scientific Data Images for HLA G Antibody (MEM-G/1) - BSA Free

Immunohistochemistry: HLA G Antibody (MEM-G/1) - BSA Free [NB500-302]

Immunohistochemistry: HLA G Antibody (MEM-G/1) - BSA Free [NB500-302]

Immunohistochemistry: HLA G Antibody (MEM-G/1) [NB500-302] - ELA affects first trimester placental explant trophoblast proliferation. HLA-G immunostaining (brown color) indicates the location of extravillous trophoblasts. In control explants (left panel) almost all villous cytotrophoblasts proliferate, while this is much less apparent in explants treated with ELA (0.25nM, right panel). Image collected and cropped by CiteAb from the following publication (https://www.nature.com/articles/s41598-019-55650-5) licensed under a CC-BY license.
Western Blot: HLA G Antibody (MEM-G/1)BSA Free [NB500-302]

Western Blot: HLA G Antibody (MEM-G/1)BSA Free [NB500-302]

Western Blot: HLA G Antibody (MEM-G/1) [NB500-302] - Using the Biotin direct conjugate analysis (reducing conditions) of HLA-G1 in HLA-G1 transfectants using the antibody MEM-G/1 biotin.
Immunohistochemistry: HLA G Antibody (MEM-G/1) - BSA Free [NB500-302]

Immunohistochemistry: HLA G Antibody (MEM-G/1) - BSA Free [NB500-302]

Immunohistochemistry: HLA G Antibody (MEM-G/1) [NB500-302] - Fig. 1B - first-trimester placenta (paraffin-embedded sections)

Applications for HLA G Antibody (MEM-G/1) - BSA Free

Application
Recommended Usage

Immunohistochemistry

1:60 - 1:100

Immunohistochemistry-Paraffin

1:60 - 1:100

Western Blot

1-2 ug/ml
Application Notes
Immunohistochemistry (paraffin sections) incubation: 1 h at RT; positive tissue: human placenta - extravillous cytotrophoblast, heat retrieval in 0.01M citrate buffer (4x2 min. in microwave oven). Use in ICC/IF reported in scientific literature (PMID: 27849611).

Formulation, Preparation, and Storage

Purification

Protein A purified

Formulation

PBS (pH 7.4)

Format

BSA Free

Preservative

0.9% Sodium Azide

Concentration

1 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C. Do not freeze.

Background: HLA-G

Human leukocyte antigen (HLA)-G is a non-classical major histocompatibility complex (MHC) class I gene belonging to the HLA class I family. The HLA class I family is subdivided into the classical (HLA-Ia) antigens comprised of HLA-A, -B, and -C molecules and the nonclassical (HLA-Ib) group including the HLA-E, -F, and -G molecules. Seven different splice variants of HLA-G have been observed including four membrane isoforms (HLA-G1, HLA-G2, HLA-G3, and HLA-G4) and three soluble isoforms (HLA-G5, HLA-G6 and HLA-G7). Proteolytic processing of HLA-G1 by metalloproteinases (MMPs) such as MMP-2 produces the soluble isoform, shedding HLA-G1. The HLA-G1 and HLA-G5 isoforms share a similar confirmation to the classical MHC class I protein, consisting of three extracellular domains including alpha1, alpha2, and alpha3 associated with Beta-2-microglobulin (B2M). Other HLA-G variants are shorter, missing one or two of the globular domains and are not bound to B2M. HLA-G receptors include KIR2DL4 (CD158d), with the highest affinity for ILT2 (LILRB1, CD85j) and ILT4 (LILRB2, CD85d) (1,2).

Discovered in cytotrophoblasts, HLA-G is involved in fetal maternal immune tolerance and some studies have linked its downregulation with severe preeclampsia (3). HLA-G mediated immune suppression works by impeding cell proliferation, differentiation, cytotoxicity, cytokine secretion and chemotaxis; and activation of regulatory cells and MDSCs or M2 type macrophage. HLA-G is constitutively expressed in immune-privileged sites such as pancreatic islets, mesenchymal stem cells (MSCs) and the cornea. Upregulation of HLA-G occurs in pathological states including cancer, allo-transplantations, viral infections, autoimmune and inflammatory diseases (4). In cancer, HLA-G expression is induced by hypoxia and has been correlated with advanced tumor stage, tumor metastasis, and poor therapeutic response and survival. HLA-G is an attractive tumor associated-antigen (TAA) for immunotherapy and is considered a major immune checkpoint (ICP).

References

1. Loustau, M., Anna, F., Drean, R., Lecomte, M., Langlade-Demoyen, P., & Caumartin, J. (2020). HLA-G Neo-Expression on Tumors. Front Immunol, 11:1685. PMID: 32922387

2. Lin A, Yan WH. (2018) Heterogeneity of HLA-G Expression in Cancers: Facing the Challenges. Front Immunol. 9:2164. PMID: 30319626

3. Djurisic S, Hviid TV. (2014) HLA Class Ib Molecules and Immune Cells in Pregnancy and Preeclampsia. Front Immunol. 5:652. PMID: 25566263

4. Lila N, Rouas-Freiss N, Dausset J, Carpentier A, Carosella ED. (2001) Soluble HLA-G protein secreted by allo-specific CD4+ T cells suppresses the allo-proliferative response: a CD4+ T cell regulatory mechanism. Proc Natl Acad Sci U S A. 98(21):12150-12155. PMID: 11572934

Long Name

Major Histocompatibility Complex, Class I, G

Alternate Names

HLA G, HLA-6.0, HLAG, MHC Class I Antigen G, MHC-G

Gene Symbol

HLA-G

Additional HLA-G Products

Product Documents for HLA G Antibody (MEM-G/1) - BSA Free

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Product Specific Notices for HLA G Antibody (MEM-G/1) - BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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