Product Information

Contents: Phycoerythrin (PE) anti-human ILT4 (CD85d)
Catalog Number: 12-5149
Sizes: 25 tests, 100 tests
Formulation: Phosphate buffered saline, pH 7.2, less than or equal to 0.09% NaN₃, BSA and/or gelatin for protein stabilization
Storage Conditions: Store at 4°C.
DO NOT FREEZE.
LIGHT-SENSITIVE MATERIAL.
Clone: 42D1
Isotype: Rat IgG2a

Staining of normal human peripheral blood cells with APC anti-human CD14 (61D3) (cat. 17-0149) and PE anti-human ILT4 (42D1). Cells in the lymphocyte (left) or monocyte (right) gate were used for analysis.

Available Formats of This Product
Cat. No.	Format	Excite (nm)	Emit (nm)	Reported Applications
16-5149	Functional Grade* Purified anti-human ILT4 (CD85d)	N/A	N/A	FC NU
12-5149	Phycoerythrin (PE) anti-human ILT4 (CD85d)	488	575	FC
*Functional Grade™ (FG™) Purified: Azide-free, sterile-filtered, and endotoxin < 0.001 ng/µg (unless otherwise noted). *Functional Grade™ (FG™) Biotin: Azide-free, sterile-filtered, and endotoxin < 0.05 ng/µg. Purified: Contains azide, not sterile-filtered, and not endotoxin tested.
Flow Cytometry Product Notes: Test Sizes: To accommodate multicolor flow cytometry, eBioscience is in the process of reducing test size volumes from 20 µl to 5 µl. Please check your antibody vial for the recommended test size. Fluorochrome Replacements: eBioscience is in the process of replacing all Pacific Blue® and APC-Alexa Fluor® 750 conjugated products with eFluor™ 450 and APC-eFluor™ 780 conjugated products, respectively.

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Description

The monoclonal antibody 42D1 recognizes the CD85d protein also known as ILT4, LIR-2. It is a member of the ILT (immunoglobulin-like transcript)/ LIR (leukocyte Ig-like receptor), MIR (monocytes Ig-like receptor) family. CD85d is a 110 kDa single transmembrane receptor with 3 Ig-like domains and a long cytoplasmic domain containing ITIMs (immunoreceptor tyrosine-based inhibitory motifs). Expression is confined to monocytes, macrophages and dendritic cells. The ligand for CD85d is non-classical class I HLA-G, -B and G1. Upon ligand binding, tyrosine phosphatase SHP-1 interacts with the ITIM. Interaction of HLA-G with ILT4/CD85d is thought to contribute to tolerance during fetal implantation. Additionally, it is the levels of ILT3 and ILT4 on DCs that suggests a role in organ allograft rejection.

Crosslinking of the receptor with the monoclonal antibody 42D1 inhibits calcium flux. The monoclonal antibody 42D1 has been shown to block binding of ligand (HLA-G tetramer).

Applications Reported

For research use only, not for diagnostic or therapeutic use. This 42D1 antibody has been reported for use in flow cytometric analysis.

Applications Tested

This 42D1 antibody has been pre-titrated and tested by flow cytometric analysis of normal human peripheral blood cells. This can be used at 20 μl (1 μg) per million cells in a 100 μl total staining volume.

References

Colonna M, Samaridis J, Cella M, Angman L, Allen RL, O'Callaghan CA, Dunbar R, Ogg GS, Cerundolo V, Rolink A.Human myelomonocytic cells express an inhibitory receptor for classical and nonclassical MHC class I molecules. J Immunol. 1998 Apr 1;160(7):3096-100.

Allan DS, Colonna M, Lanier LL, Churakova TD, Abrams JS, Ellis SA, McMichael AJ, Braud VM. Tetrameric complexes of human histocompatibility leukocyte antigen (HLA)-G bind to peripheral blood myelomonocytic cells. J Exp Med. 1999 Apr 5;189(7):1149-56.

Colonna M, Nakajima H, Navarro F, López-Botet M.A novel family of Ig-like receptors for HLA class I molecules that modulate function of lymphoid and myeloid cells. J Leukoc Biol. 1999 Sep;66(3):375-81

Manavalan JS, Rossi PC, Vlad G, Piazza F, Yarilina A, Cortesini R, Mancini D, Suciu-Foca N. High expression of ILT3 and ILT4 is a general feature of tolerogenic dendritic cells. Transpl Immunol. 2003 Jul-Sep;11(3-4):245-58. (42D1, FA,FC, PubMed)

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