Key Product Details

Species Reactivity

Human

Applications

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

Label

Alexa Fluor 488 (Excitation = 488 nm, Emission = 515-545 nm)

Antibody Source

Monoclonal Mouse IgG1 Clone # MEM-G/1

Concentration

Please see the vial label for concentration. If unlisted please contact technical services.

View all HLA-G Antibodies »

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)

Reactivity Notes

Mouse reactivity reported in scientific literature (PMID: 27849611).

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

Applications for HLA G Antibody (MEM-G/1) [Alexa Fluor® 488]

Application
Recommended Usage

Immunocytochemistry/ Immunofluorescence

Optimal dilutions of this antibody should be experimentally determined.

Immunohistochemistry

Optimal dilutions of this antibody should be experimentally determined.

Immunohistochemistry-Frozen

Optimal dilutions of this antibody should be experimentally determined.

Immunohistochemistry-Paraffin

Optimal dilutions of this antibody should be experimentally determined.

Western Blot

Optimal dilutions of this antibody should be experimentally determined.
Application Notes
Optimal dilution of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Protein A purified

Formulation

50mM Sodium Borate

Preservative

0.05% Sodium Azide

Concentration

Please see the vial label for concentration. If unlisted please contact technical services.

Shipping

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

Stability & Storage

Store at 4C in the dark.

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) [Alexa Fluor® 488]

Product Datasheets

Certificate of Analysis

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

Download SDS

Product Specific Notices for HLA G Antibody (MEM-G/1) [Alexa Fluor® 488]



Alexa Fluor (R) products are provided under an intellectual property license from Life Technologies Corporation. The purchase of this product conveys to the buyer the non-transferable right to use the purchased product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components, or any materials made using the product or its components, in any activity to generate revenue, which may include, but is not limited to use of the product or its components: (i) in manufacturing; (ii) to provide a service, information, or data in return for payment; (iii) for therapeutic, diagnostic or prophylactic purposes; or (iv) for resale, regardless of whether they are resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@lifetech.com. This conjugate is made on demand. Actual recovery may vary from the stated volume of this product. The volume will be greater than or equal to the unit size stated on the datasheet.

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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