KB-1343

9D9-mIgG2b

12285

Background of 9D9-mIgG2b

9D9 antibody is specific for mouse CTLA-4. The antibody has been used to block CTLA-4 and has been shown to enhance T-cell immunity against tumours. 9D9 also has an anti-B16/BL6 melanoma effect in non-irradiated tumour-bearing recipients when given as combinatorial therapy with Gvax. 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.

Specifications

Catalog Number	KB-1343
Antibody Name	9D9-mIgG2b
Isotype	Mouse IgG2b,kappa
Target	Mouse-CTLA4
Species Reactivity	Mouse
Host Cell Line	EXPI CHO
Purification Method	Affinity purified
Concentration	>2 mg/mL
Formulation	50 mM sodium citrate,150mM NaCl,pH5.5
Purity	>95% by SDS-PAGE and SEC-HPLC
Validation	ELISA
Endotoxin Level	<0.2 EU/mg as determined by the LAL method
Sterility	0.2μm filtered
Storage	It is recommended that the protein should be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Stability	Stable for twelve months from date of receipt when stored at -20°C to -80°C; Stored at 2-8°C for one month without detectable loss of activity.

Characterization

Application

References

Korman AJ, Peggs KS, Allison JP. Checkpoint blockade in cancer immunotherapy. Adv. Immunol. 2006;90:297–339. doi: 10.1016/S0065-2776(06)90008-X.
Leach DR, Krummel MF, Allison JP. Enhancement of antitumor immunity by CTLA-4 blockade. Science. 1996;271:1734–1736.