8azu

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Current revision (06:46, 24 July 2024) (edit) (undo)
 
Line 15: Line 15:
Soluble oligomers of amyloid beta-protein (Abeta) have been defined as aggregates in supernatants following ultracentrifugation of aqueous extracts from Alzheimer's disease (AD) brains and are believed to be upstream initiators of synaptic dysfunction, but little is known about their structures. We now report the unexpected presence of Abeta fibrils in synaptotoxic high-speed supernatants from AD brains extracted by soaking in an aqueous buffer. The fibrils did not appear to form during preparation, and their counts by EM correlated with Abeta ELISA quantification. Cryo-EM structures of aqueous Abeta fibrils were identical to those from sarkosyl-insoluble homogenates. The fibrils in aqueous extracts were labeled by lecanemab, an Abeta aggregate-directed antibody reported to improve AD cognitive outcomes. Lecanemab provided protection against aqueous fibril synaptotoxicity. We conclude that fibrils are abundant in aqueous extracts from AD brains and have the same structures as those from plaques. These findings have implications for AD pathogenesis and drug design.
Soluble oligomers of amyloid beta-protein (Abeta) have been defined as aggregates in supernatants following ultracentrifugation of aqueous extracts from Alzheimer's disease (AD) brains and are believed to be upstream initiators of synaptic dysfunction, but little is known about their structures. We now report the unexpected presence of Abeta fibrils in synaptotoxic high-speed supernatants from AD brains extracted by soaking in an aqueous buffer. The fibrils did not appear to form during preparation, and their counts by EM correlated with Abeta ELISA quantification. Cryo-EM structures of aqueous Abeta fibrils were identical to those from sarkosyl-insoluble homogenates. The fibrils in aqueous extracts were labeled by lecanemab, an Abeta aggregate-directed antibody reported to improve AD cognitive outcomes. Lecanemab provided protection against aqueous fibril synaptotoxicity. We conclude that fibrils are abundant in aqueous extracts from AD brains and have the same structures as those from plaques. These findings have implications for AD pathogenesis and drug design.
-
Abundant Abeta fibrils in ultracentrifugal supernatants of aqueous extracts from Alzheimer's disease brains.,Stern AM, Yang Y, Jin S, Yamashita K, Meunier AL, Liu W, Cai Y, Ericsson M, Liu L, Goedert M, Scheres SHW, Selkoe DJ Neuron. 2023 May 2:S0896-6273(23)00269-6. doi: 10.1016/j.neuron.2023.04.007. PMID:37167969<ref>PMID:37167969</ref>
+
Abundant Abeta fibrils in ultracentrifugal supernatants of aqueous extracts from Alzheimer's disease brains.,Stern AM, Yang Y, Jin S, Yamashita K, Meunier AL, Liu W, Cai Y, Ericsson M, Liu L, Goedert M, Scheres SHW, Selkoe DJ Neuron. 2023 Jul 5;111(13):2012-2020.e4. doi: 10.1016/j.neuron.2023.04.007. Epub , 2023 May 10. PMID:37167969<ref>PMID:37167969</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

Current revision

Paired helical tau filaments from high-spin supernatants of aqueous extracts from Alzheimer's disease brains | PHF Tau

PDB ID 8azu

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools