Skeptics counter that those figures come from voluntary reporting rather than controlled trials, and that questions remain about immunogenicity, whether the body mounts an immune response to the peptide
add on to other therapeutic schemes)
117 Another example is that the AMPs, human -defensins, can specifically bind to fibronectin (FN) to block the adhesion and transfer of integrin 51 mediating endothelial cells to fibronectin, and block the proliferation and apoptosis of endothelial cells mediated by vascular endothelial growth factor (VEGF), that is, human -defensins inhibit tumor angiogenesis in many ways, thereby exerting its anti-cancer effect
Scientists have focused on polypeptide drugs because they tend to need lower doses and induce fewer side effects than other drugs
The difference between a study that replicates published senolytic outcomes and one that reports 'no significant effect' often traces to errors invisible in the methods section: a vial left at room temperature for 30 minutes during transport between labs, a reconstitution ratio miscalculated by 20%, or doses drawn from a vial on day 25 when biological activity has declined below threshold
Cutri, R