β amyloid (1 11)

Anionic interaction of Beta-amyloid (1-11) with Factor XII is suspected to cause massive activation of the C4 (complement 4) system in the cerebrospinal fluid of Alzheimer's disease patients.

β-amyloid 1-11 acetate is a fragment of Amyloid-β peptide, maybe used in the research of neurological disease.

Umibecestat is an inhibitor of beta-site amyloid precursor protein cleaving enzyme-1 (BACE-1), with IC50s of 11 nM and 10 nM for human BACE-1 and mouse BACE-1, respectively. Umibecestat can be used for the research of alzheimer's disease.

BuChE-IN-11 (Compound 3b-1) is a selective inhibitor of BuChE with an IC50 of 0.44 μM for hBuChE. The compound demonstrates high brain-blood barrier permeability and possesses free radical scavenging capabilities, indicating significant antioxidant activity. BuChE-IN-11 interacts with the choline binding site, the acyl binding site, and the peripheral anionic site, showing submicromolar inhibitory activity against BuChE and preventing the self-aggregation of β-amyloid protein (Aβ). This compound holds promise for research in the field of Alzheimer's disease.

Amyloid-β (1-42) (Aβ42) is a neurotoxic 42-amino acid protein fragment found in amyloid plaques in postmortem cerebral cortex from patients with Alzheimer's disease.1,2,3Aggregation of Aβ42 results in the formation of neurotoxic fibrils or globular oligomers.1Aβ42 accumulates in the brain of many transgenic mouse models of Alzheimer's disease and, in many models, the onset of amyloid deposition positively correlates with deficits in spatial learning and memory.4 1.Wolfe, M.S.Therapeutic strategies for Alzheimer's diseaseNat. Rev. Drug Discov.1(11)859-866(2002) 2.Iwatsubo, T., Odaka, A., Suzuki, N., et al.Visualization of Aβ42(43) and Aβ40 in senile plaques with end-specific Aβ monoclonals: Evidence that an initially deposited species is Aβ42(43)Neuron13(1)45-53(1994) 3.Hardy, J.A., and Higgins, G.A.Alzheimer's disease: The amyloid cascade hypothesisScience256(5054)184-185(1992) 4.Jankowsky, J.L., and Zheng, H.Practical considerations for choosing a mouse model of Alzheimer's diseaseMol. Neurodegener.12(1)89(2017)

Amyloid-β (25-35) (Aβ (25-35)) is an 11-residue fragment of the Aβ protein that retains the physical and biological characteristics of the full length peptide. It forms fibrils that react to thioflavin T and Congo red and are organized in a cross-β arrangement of β-strands similar to Aβ (1-40) and Aβ (1-42) fibrils. Aggregated Aβ (25-35) decreases the viability of rat adrenal PC12 cells. It also decreases the viability of primary rat cortical neurons at concentrations ranging from 1 nM to 30 μM. In vivo, intracerebral injection of Aβ (25-35) (20 nmol) in rats induces lesions of neuronal and tissue loss. Aggregated Aβ (25-35) administered intracerebroventricularly to rats induces learning and memory impairments in the Y-maze, novel object recognition, and contextual fear conditioning tests.

(Pyr11)-Amyloid β-Protein (11-40) (Aβ11pE-40), a peptide, is utilized in Alzheimer's disease research [1].