14-0747-80

antibody from Invitrogen Antibodies

Targeting: CD74 DHLAG

Western blot (Supportive data in Antibodypedia)

Immunocytochemistry (Supportive data in Antibodypedia)

Immunohistochemistry (Supportive data in Antibodypedia)

Other assay (Supportive data in Antibodypedia)

Antibody Data

Product number

14-0747-80

Provider

Invitrogen Antibodies

Product name

CD74 Monoclonal Antibody (VIC-Y1), eBioscience™

Antibody type

Monoclonal

Antigen

Other

Description

Description: This VIC-Y1 monoclonal antibody recognizes human CD74, also known as the MHC Class II-associated invariant chain. A 33-43 kDa nonpolymorphic type II membrane protein, CD74 is highly expressed on B cells and subsets of activated T cells, Langerhans cells, dendritic cells, and epithelial cells. Monocytes and macrophages also express CD74, but at lower levels. CD74 acts as a chaperone of MHC Class II (HLA-DR) proteins, promoting their translocation from the ER to endocytic compartments during antigen presentation. Activation of NFkB and ERK has been shown following CD74 interaction with CD44 and binding to the proinflammatory cytokine macrophage migration-inhibitory factor (MIF). CD74 also plays a role in the maturation of follicular B-cells and accumulation of marginal zone B-cells. CD74 has also been demonstrated to interact with CXCR2 and CXCR4.

Antibody clone number

VIC-Y1

Concentration

0.5 mg/mL

References

Submitted references

A functional heteromeric MIF receptor formed by CD74 and CXCR4.

Schwartz V, Lue H, Kraemer S, Korbiel J, Krohn R, Ohl K, Bucala R, Weber C, Bernhagen J
FEBS letters 2009 Sep 3;583(17):2749-57

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CD74 is a member of the regulated intramembrane proteolysis-processed protein family.

Becker-Herman S, Arie G, Medvedovsky H, Kerem A, Shachar I
Molecular biology of the cell 2005 Nov;16(11):5061-9

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Invariant chain targets HLA class II molecules to acidic endosomes containing internalized influenza virus.

Lamb CA, Yewdell JW, Bennink JR, Cresswell P
Proceedings of the National Academy of Sciences of the United States of America 1991 Jul 15;88(14):5998-6002

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Human major histocompatibility complex class II invariant chain is expressed on the cell surface.

Wraight CJ, van Endert P, Möller P, Lipp J, Ling NR, MacLennan IC, Koch N, Moldenhauer G
The Journal of biological chemistry 1990 Apr 5;265(10):5787-92

Western blot

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

Western blot was performed using Anti-CD74 Monoclonal Antibody (VIC-Y1), (Product # 14-0747-82) and 35 kDa band corresponding to CD 74 was observed across cell lines tested except in K-562, H-L60, HEK-293 and BJ. Whole cell extracts (30 µg lysate) of Daudi (Lane 1), REH (Lane 2), K-562 (Lane 3), Raji (Lane 4), HL-60 (Lane 5), HEK-293 (Lane 6) and BJ (Lane 7) were electrophoresed using Novex® NuPAGE® 4-12 % Bis-Tris gel (Product # NP0321BOX). Resolved proteins were then transferred onto a nitrocellulose membrane (Product # IB23001) by iBlot® 2 Dry Blotting System (Product # IB21001). The blots were probed with the primary antibody (0.5 µg/mL) and detected by chemiluminescence with Goat anti-Mouse IgG (H+L), Superclonal™ Recombinant Secondary Antibody, HRP conjugate (Product # A28177, 1:4000 dilution) using the iBright FL 1000 (Product # A32752). Chemiluminescent detection was performed using Novex® ECL Chemiluminescent Substrate Reagent Kit (Product # WP20005).

Immunocytochemistry

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

Immunofluorescence analysis of CD74 was performed using Daudi cells. The cells were fixed with 4% paraformaldehyde for 10 minutes, permeabilized with 0.1% Triton™ X-100 for 15 minutes, and blocked with 2% BSA for 1 hour at room temperature. The cells were labeled with CD74 Monoclonal Antibody (VIC-Y1) (Product # 14-0747-82) at 1:100 dilution in 0.1% BSA, incubated at 4 degree Celsius overnight and then labeled with Donkey anti-Mouse IgG (H+L) Highly Cross-Adsorbed Secondary Antibody, Alexa Fluor Plus 488 (Product # A32766) at a dilution of 1:2000 for 45 minutes at room temperature (Panel a: green).Nuclei (Panel b: blue) were stained with SlowFade® Gold Antifade Mountant with DAPI (Product # S36938). F-actin (Panel c: red) was stained with Rhodamine Phalloidin (Product # R415, 1:300). Panel d represents the merged image showing localization to the plasma membrane. Panel e represents control cells with no primary antibody to assess background. The images were captured at 60X magnification.

Immunohistochemistry

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

Immunohistochemistry on formalin-fixed paraffin embedded human tonsil, using 5 µg/mL of Mouse IgG1 kappa Isotype Control (Product # 14-4714-82) (left) or Anti-Human CD74 Purified (right) followed by biotinylated Anti-Mouse IgG Biotin (Product # 13-4013-85) and DAB visualization. Nuclei are counterstained with hematoxylin.

Other assay

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

NULL

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

NULL

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

NULL

Supportive validation

Submitted by

Invitrogen Antibodies (provider)

Main image

Experimental details

CXCR4/CD74 receptor complex formation correlates with a functional interplay between CD74 and CXCR4. The CXCR4 inhibitor AMD3100 as well as anti-CXCR4 and anti-CD74 antibodies block MIF-mediated AKT activation in Jurkat T cells, whereas SDF-1alpha-mediated AKT activation is only reduced by anti-CXCR4 but not anti-CD74. (a) Flow cytometry histogram showing surface expression of CXCR4 in Jurkat T cells. Fluorescence intensity of anti-CXCR4-stained cells (green) is compared with that of cells stained with a non-specific FITC-IgG (grey). (b) Flow cytometry histogram showing surface expression of CD74 in Jurkat T cells. Fluorescence intensity of anti-CD74-stained cells (red) is compared with that of cells stained with a non-specific FITC-IgG (grey). (c) Jurkat cells pre-treated with AMD3100 (1 mug/ml, 30 min; +AMD3100) or with control buffer were incubated with rMIF at indicated concentrations for 10 min and AKT activation measured by Western blot using a phospho-Ser473-AKT antibody. Actin staining was performed for standardization of the blot. (d) Quantification of the blot according to (c) (phosphorylation ratio: AKT/actin; mean of n = 2). (e) As in c except that Jurkat cells were pre-treated with anti-CD74, anti-CXCR4 antibody or control IgG1 (10 mug/ml each, 30 min). MIF was added at a concentration of 100 ng/ml and for comparison cells were stimulated with 100 ng/ml SDF-1alpha. (f) Quantification of the blot according to (e) (phosphorylation ratio: AKT/actin; mean of n = 2).