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- W3011083066 abstract "Abstract Single domain shark antibodies that bind to the transferrin receptor 1 (TfR1) on brain endothelial cells can be used to shuttle antibodies and other cargos across the blood brain barrier (BBB). We have fused one of these (TXB4) to differing regions of TrkB and TrkC neurotrophin receptor agonist antibodies (AAb) and determined the effect on agonist activity, brain accumulation and engagement with neurons in the mouse brain following systemic administration. The TXB4-TrkB and TXB4-TrkC fusion proteins retain agonist activity at their respective neurotrophin receptors and in contrast to their parental AAb they rapidly accumulate in the brain reaching nM levels following a single IV injection. Following SC administration, the most active TrkB fusion protein, TXB4-TrkB 1 , associates with and activates ERK1/2 signalling in TrkB positive cells in the cortex and tyrosine hydroxylase (TH) positive dopaminergic neurons in the substantia nigra pars compacta (SNc). When tested in the 6-hydroxydopamine (6-OHDA) mouse model of Parkinson’s disease (PD) TXB4-TrkB 1 , but not the parental TrkB AAb or a TXB4-TrkC 1 fusion protein, completely prevented the 6-OHDA induced death of TH positive neurons in the SNc. In conclusion, the fusion of the TXB4 TfR1 binding module allows a TrkB AAb to reach neuroprotective concentrations in the brain parenchyma following systemic administration." @default.
- W3011083066 created "2020-03-23" @default.
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- W3011083066 date "2020-03-12" @default.
- W3011083066 modified "2023-09-26" @default.
- W3011083066 title "A single domain shark antibody targeting the transferrin receptor 1 delivers a TrkB agonist antibody across the blood brain barrier to provide full neuroprotection in a mouse model of Parkinson’s Disease" @default.
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