HLA G Antibody (17A5)

Novus Biologicals, part of Bio-Techne | Catalog # NBP3-26226

Recombinant monoclonal antibody expressed in HEK293F cells
Novus Biologicals, part of Bio-Techne
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NBP3-26226-100ul
NBP3-26226-50ul
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Key Product Details

Species Reactivity

Validated:

Human

Applications

ELISA, Flow Cytometry

Label

Unconjugated

Antibody Source

Recombinant Monoclonal Rabbit IgG Clone # 17A5

Concentration

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

View all HLA-G Antibodies »

Product Summary for HLA G Antibody (17A5)

Immunogen

A synthesized peptide derived from Human HLA G [UniProt P17693]

Clonality

Monoclonal

Host

Rabbit

Isotype

IgG

Scientific Data Images for HLA G Antibody (17A5)

HLA G Antibody (17A5)

Flow Cytometry: HLA G Antibody (17A5) [NBP3-26226] -

Flow Cytometry: HLA G Antibody (17A5) [NBP3-26226] - Overlay Peak curve showing U937 cells stained with HLA G Antibody (17A5) (red line) at 1:50. The cells were fixed in 4% formaldehyde and permeated by 0.2% Triton X-100. Then 10% normal goat serum to block non-specific protein-protein interactions followed by the antibody (1ug/1*10^6 cells) for 45min at 4C. The secondary antibody used was FITC-conjugated Goat Anti-rabbit IgG (H+L) at 1:200 dilution for 35min at 4C. Control antibody (green line) was rabbit IgG (1ug/1*10^6 cells) used under the same conditions. Acquisition of >10,000 events was performed.

Applications for HLA G Antibody (17A5)

Application
Recommended Usage

Flow Cytometry

1:50-1:200
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Affinity purified

Formulation

PBS, pH 7.4, 150mM NaCl and 50% glycerol

Preservative

0.02% 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 -20 to -70C. Avoid freeze-thaw cycles.

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 (17A5)

Product Datasheets

Certificate of Analysis

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Product Specific Notices for HLA G Antibody (17A5)

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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