Anti-CTLA-4 [9D9]

Catalogue Number: BAB0166-BT-ABA

Manufacturer:Vector Laboratories, Inc (ABA)
Type:Recombinant Monoclonal
Alias:CD152; CTLA4; Cytotoxic T-Lymphocyte Associated Protein 4; Insulin-Dependent Diabetes Mellitus 12; Celiac Disease 3; Ligand And Transmembrane Spliced Cytotoxic T Lymphocyte Associated Antigen 4; Cytotoxic T Lymphocyte Associated Antigen 4 Short Spliced Fo
Shipping Condition:Blue Ice
Unit(s): 500 ug
Host name: Mouse
Clone: 9D9
Isotype: IgG2a
Immunogen: The antibody was raised against CTLA-4.
Application: IF, Blk

Additional Text

Gene ID

12477

Gene Name

CTLA4

Uniprot ID

P09793

Purification

Purified

Antibody Clonality

Recombinant Monoclonal

Storage Note

Store at 4⁰C for up to 3 months. Note, this antibody is provided without added preservatives, it is therefore recommed this antibody be handled under sterile conditions. For longer storage, aliquot and store at -20⁰C.

Application Notes

The antibody has been used to block CTLA-4 and has been shown to enhance T-cell immunity against tumours (Quezada et al, 2006). 9D9 also has an anti-B16/BL6 melanoma effect in non-irradiated tumour-bearing recipients when given as combinatorial therapy with Gvax (Peggs et al, 2009). Selby et al. (PMID: 24777248) show how conversion of the original mouse IgG2b to a mouse IgG2a greatly increases anti-tumor activity of the 9D9 antibody in both MC38 (C57BL/6 mice) and CT26 (BALB/c mice) models. This mechanism both involves blockade of CTLA4 as well as depletion of tumor-infiltrating regulatory T-cells. Fc Silent antibodies were shown to have reduced anti-tumor activity as they did not deplete tumor infiltrating regulatory T-cells, however they lead to expansion of peripheral Tregs.

Short Description

This is a bispecific, knob-into-hole heterodimerized antibody, with one arm directed against CTLA4 (Fab) and one arm directed against mouse PDL-1 (VHH).