| First Author | White AL | Year | 2015 |
| Journal | Cancer Cell | Volume | 27 |
| Issue | 1 | Pages | 138-48 |
| PubMed ID | 25500122 | Mgi Jnum | J:217741 |
| Mgi Id | MGI:5615522 | Doi | 10.1016/j.ccell.2014.11.001 |
| Citation | White AL, et al. (2015) Conformation of the human immunoglobulin g2 hinge imparts superagonistic properties to immunostimulatory anticancer antibodies. Cancer Cell 27(1):138-48 |
| abstractText | Monoclonal antibody (mAb) drugs that stimulate antitumor immunity are transforming cancer treatment but require optimization for maximum clinical impact. Here, we show that, unlike other immunoglobulin isotypes, human IgG2 (h2) imparts FcgammaR-independent agonistic activity to immune-stimulatory mAbs such as anti-CD40, -4-1BB, and -CD28. Activity is provided by a subfraction of h2, h2B, that is structurally constrained due its unique arrangement of hinge region disulfide bonds. Agonistic activity can be transferred from h2 to h1 by swapping their hinge and CH1 domains, and substitution of key hinge and CH1 cysteines generates homogenous h2 variants with distinct agonistic properties. This provides the exciting opportunity to engineer clinical reagents with defined therapeutic activity regardless of FcgammaR expression levels in the local microenvironment. |
