No silencing antibodies in this approach: Inovio recently announced the successful animal testing of its dMAbs targeting the immune checkpoint molecule CTLA-4, as reported in the prestigious journal Cancer Research. The breakthrough preclinical study demonstrated that highly optimized dMAbs targeting mouse CTLA-4 protein can be robustly expressed in vivo, and shrank tumors in mice. More importantly, Inovio’s dMAb constructs for anti-human CTLA-4 antibodies ipilimumab (YERVOY®) and tremelimumab, achieved high expression levels in mice (approximately 85µg/ml and 58µg/ml, respectively). These dMAbs exhibited long-term expression with maintenance of serum levels >15µg/ml for over a year.
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