Sure pertuzumab seems to suggest inhibiting other family of EGF and dimerization might be important. However, If I recall correctly 543 was not as potent as 380 in clinical trials due to tolerability issues. Targeting EGF-1 might be an added benefit but it also reduces MTD and reduces HER-2 inhibition. ONTY is running a combo of 380 with herceptin and TMD-1. We should see in 2-3 years if I am wrong.
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