b-amyloid , human

Human beta-amyloid protein 42 (1-7) is a bioactive chemical.

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.

β-Amyloid (1-37) (human) is potentially associated with mental status in Alzheimer's disease.

The amyloid β-protein is a 39- to 43-amino acid polypeptide that is the primary constituent of senile plaques and cerebrovascular deposits in Alzheimer's disease and Down's syndrome. Additionally it acts as an inhibitor of the ubiquitin-dependent protein degradation in vitro.

AChE/BChE/MAO-B-IN-4, an indan-1-one derivative, is a potent inhibitor of monoamine oxidase B (MAO-B) and acetylcholinesterase/butyrylcholinesterase (AChE/BChE). It strongly inhibits human MAO-B with an IC50 of 0.0393 μM and is highly effective against human AChE and BChE with IC50 values of 0.0458 μM and 0.075 μM, respectively. Additionally, this compound exhibits significant antioxidant properties and ability to prevent β-amyloid plaque aggregation, suggesting its potential in Alzheimer's disease (AD) research.

AChE/MAO-B-IN-3 is a dual inhibitor targeting both acetylcholinesterase (AChE) and monoamine oxidase B (MAO-B), exhibiting inhibitory concentrations (IC50s) of 0.0257 μM and 0.0456 μM against human AChE and MAO-B, respectively. This compound holds potential for Alzheimer's disease research.

AChE/MAO-IN-1 is a potent inhibitor of human acetylcholinesterase (AChE), monoamine oxidase A (MAO-A), and monoamine oxidase B (MAO-B), demonstrating inhibitory concentrations (IC50) of 0.0248 μM, 0.0409 μM, and 0.1108 μM against AChE, MAO-A, and MAO-B, respectively.

β-Amyloid (1-42), human, is a 42-amino acid peptide integral to the pathogenesis of Alzheimer disease.

β-Amyloid (42-1), human is the inactive form of amyloid β peptide (1-42), consisting of 42 amino acids. It plays a key role in the pathogenesis of Alzheimer's disease and is commonly used to induce Alzheimer's disease models.

Amyloid β Peptide (42-1)(human) acetate is the inactive form of Amyloid β Peptide (1-42). Amyloid β Peptide (42-1)(human) acetate is a 42-amino acid peptide which plays a key role in the pathogenesis of Alzheimer disease.