Aβ-IN-1

Aβ-IN-1 is a novel, potent and orally active γ-secretase modulator (GSM). Aβ-IN-1 potently reduced Aβ42 levels with an IC 50 value of 0.091 μM in cultured cells without inhibiting CYP3A4. Aβ-IN-1 shows a sustained pharmacokinetic profile.

Aβ-IN-1 TFA inhibits and reverses different types of protein aggregation.

AChE Aβ-IN-1 (compound 32) is a potent, orally active acetylcholinesterase (AChE) inhibitor with an IC50 of 86 nM and an NMDA receptor antagonist targeting the GluN1-1b GluN2B subunit combination with an IC50 of 3.876 μM. It also impedes Aβ aggregation, exhibits favorable blood-brain barrier permeability, offers neuroprotection, and enhances cognitive and spatial memory in rat models [1].

Aβ aggregation-IN-1 (Compound 1b) is an inhibitor of amyloid-beta precursor protein. It suppresses the aggregation and disaggregation of amyloid-beta fibrils with IC50 values of 3.92 and 7.19 M, respectively. Additionally, Aβ aggregation-IN-1 reduces malondialdehyde formation in neuronal cells, increases intracellular levels of reduced glutathione (GSH), and inhibits caspase 3.

Aβ tau aggregation-IN-1 is a potent inhibitor of Aβ 1-42 β-sheet formation and tau aggregation, exhibiting K D values of 160 μM and 337 μM with Aβ 1-42 and tau, respectively. Additionally, Aβ tau aggregation-IN-1 efficiently penetrates the blood-brain barrier.

Aβ-IN-10 (Compound Alz-5) is a bifunctional copper chelator and an inhibitor of beta-amyloid (Aβ), interacting with Aβ aggregates to reduce their neurotoxicity. This compound also displays antioxidative properties and exhibits moderate cytotoxicity in SH-SY5Y and HepG2 cells in the presence of CuCl2, with IC50 values of 65.5 and 31.2 μM, respectively. Additionally, Aβ-IN-10 reduces the increase in cell rigidity caused by Aβ.

Atabecestat (JNJ-54861911) is a potent, brain-penetrant, and orally active β-site amyloid precursor protein cleaving enzyme 1 (BACE1) inhibitor that achieves robust and high CSF Aβ reduction, is well-tolerated, and displays sustained pharmacokinetic (PK) and pharmacodynamic (PD) characteristics. Atabecestat (JNJ-54861911) has the potential for Alzheimer's Disease treatment[1].

3,5-Bis(4-nitrophenoxy)benzoic acid (Compound W) is a γ-secretase inhibitor that reduces the levels of released Aβ42 and notch-1 Aβ-like peptide 25 (Nβ25).

Aftin-4, an amyloid forty-two inducer, activates γ-secretase, promoting the generation of amyloid-β-1-42 (Aβ1-42) from amyloid-β protein precursor. Aftin-4(Aftin4) increased Aβ-1-42, but not Aβ-1-40 in mouse hipppocampus, accompanied by learning deficits and mitochondrial ultrastructural changes similar to those found in the brains of patients with AD. Aftin-4(Aftin4) can thus be used to induce a rapid, acute Alzheimer's disease-like toxicity in the rodent brain.

BACE1-IN-5 (Compound 15), a potent β-site amyloid precursor protein cleaving enzyme 1 (BACE1) inhibitor, demonstrates significant efficacy with an IC50 of 9.1 nM for BACE1 inhibition and an impressive IC50 of 0.82 nM against cellular amyloid-β (Aβ) production. Additionally, it is engineered to enhance hERG inhibition and P-gp efflux, indicating its optimized medicinal chemistry profile [1].

BuChE-IN-TM-10 (TM-10) is a potent inhibitor of butyrylcholinesterase (BuChE) with an IC50 of 8.9 nM. It effectively inhibits and disaggregates self-induced Aβ aggregation, exhibits significant antioxidant activity, and demonstrates substantial penetration through the blood-brain barrier (BBB), holding promise as a potential treatment for Alzheimer's disease.

Gamma-secretase modulator 2 is a potent, selective compound for the treatment of Alzheimer's disease, specifically designed to modulate γ-secretase activity. This modulation selectively attenuates the production of Aβ(1-42), addressing diseases associated with Aβ deposition in the brain, particularly Alzheimer's disease.

Amyloid-β-IN-1 (compound 13), a synthetic peptide featuring the hydrophobic C-terminal segment VVIA-NH2 and its reversed sequence AIVV-NH2 derived from Aβ 42, acts as an Aβ inhibitor. It effectively inhibits Aβ aggregation and exhibits neuroprotective effects.

Tau-0N4R-IN-1 (Compound 6T) is a brain-penetrant inhibitor of tau0N4R oligomerization. It effectively inhibits the fibrillization of tau 0N4R, 2N3R, and 2N4R, showcasing potent anti-seeding effects against tau in vitro, and can dose-dependently reduce α-syn oligomerization while preventing the formation of α-syn inclusions. Tau-0N4R-IN-1 demonstrates stability in mouse microsomes and reduces Aβ plaques derived from the brain tissue of AD patients. Moreover, it exhibits favorable pharmacokinetic properties in mice.

hAChE hBuChE GSK-3β-IN-1 (Compound 6c) is a multi-target compound designed for Alzheimer's treatment capable of crossing the blood-brain barrier. It inhibits hAChE with an IC50 of 28.88 nM, hBuChE with an IC50 of 131.90 nM, and GSK-3β with an IC50 of 51.42 nM. Additionally, it acts as an inhibitor of tau protein and Aβ protein aggregation.

AChE-IN-80 (Compound 1) is an inhibitor of acetylcholinesterase (AChE). It suppresses inflammation and reactive oxygen species (ROS) production in cultured neurons and microglia, induces autophagy, and prevents the spread of beta-amyloid (Aβ) fibrils. AChE-IN-80 exhibits antioxidant activity and neuroprotective effects, making it valuable for Alzheimer's disease research.

SEN-1269 is an amyloid-β (AB) aggregation inhibitor that acts by blocking Aβ(1-42) aggregation and protecting neuronal cell lines exposed to Aβ(1-42), reducing Aβ oligomer-induced LTP and memory deficits in vivo.

Tabersonine (Tabersonin)is a terpene indole alkaloid found in the medicinal plant Catharanthus roseus.

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 (1-8, A2V) is a truncated form of amyloid-β (Aβ) that contains a valine to alanine substitution at position 2 of the Aβ numbering convention (Aβ A2V), which corresponds to position 673 of the amyloid precursor protein (APP) numbering convention (APP A673V). An Aβ (1-40) (Aβ40) A2V peptide increases the production of Aβ and the rate and amount of amyloid fibril formation in vitro, effects that can be reduced by coincubation with wild-type Aβ40. Aβ40 and Aβ42 levels are increased in CHO cells expressing the Aβ A2V mutation and in fibroblasts derived from patients with the Aβ A2V mutation. As a homozygous mutation, Aβ A2V is correlated with Alzheimer's disease with distinctive pathological features, but disease does not develop in patients with a heterozygous Aβ A2V mutation.

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.

1. N-trans-Feruloyltyramine (Feruloyltyramine)(NTF) has hepatoprotective effect. 2. NTF has antioxidative activity against Aβ(1-42)-induced neuronal death. 3. NTF is likely to inhibit COX enzymes, thereby suppressing P-selectin expression on platelets, is a platelet aggregation inhibitor. 4. NTF inhibits melanogenesis in a dose-dependent manner, NTF induces downregulation of tyrosinase resulted in suppression of melanin biosynthesis in murine B16 melanoma cells.

β-Secretase Inhibitor II is a tripeptide aldehyde inhibitor of β-Secretase with an inhibitory potency of IC50 = 700 nM against total Aβ and IC50 = 2.5 μM against Aβ[1-42]. This compound, with a simple structure, is particularly useful in Alzheimer's disease research.

AChE BChE BACE-1-IN-2 (Compound 4o) is an orally active AChE, BACE-1, and BChE inhibitor with IC50 values of 0.069, 0.097, and 0.127 μM against hAChE, hBACE-1, and hBChE, respectively. It exhibits remarkable antioxidant potential, considerable binding capability towards PAS-AChE, potential disassembly of Aβ aggregates, and neuroprotective activity against Aβ-induced stress with excellent brain permeation [1].