tau protein

NQTrp is an inhibitor of the aggregation of the tau protein with generic anti-amyloidogenic effects.

tau Protein α-synuclein-IN-2 (Compound 14T) is a tau and α-synuclein inhibitor capable of crossing the blood-brain barrier. It reduces α-synuclein oligomerization in a dose-dependent manner through a thiourea linker structure. In biosensor cells, tau Protein α-synuclein-IN-2 prevents tau aggregation seed effects. In the M17D neuroblastoma model, this compound exhibits anti-inclusion effects and reduces Aβ plaque formation. tau Protein α-synuclein-IN-2 shows potential for Alzheimer's and Parkinson's disease research.

Tau Protein Aggregation-IN-1 (Compound 0c) serves as an inhibitor of Tau protein aggregation, applicable in research related to protein folding disorders including Alzheimer's disease, dementia, Parkinson's disease, Huntington's disease, and prion-based spongiform encephalopathies [1].

Tau protein α-synuclein-IN-1 is a dual inhibitor that not only impedes tau protein and α-synuclein but also reduces the development of α-syn inclusions in M17D neuroblastoma cells, making it a useful agent in the study of Alzheimer's disease [1].

Tau protein (592-597), Human (TFA) is a peptide fragment of human Tau protein.

Microtubule-associated protein tau (26-44) is a synthetic peptide with an amino group conjugated to glutamine and a carboxyl group conjugated to lysine.

C004019 is a small molecule PROTAC capable of targeting tau for selective protein degradation from the cell, while recruiting tau and E3 ligase (Vhl) for selective enhancement of tau ubiquitination and proteollyzation. C004019 is a candidate for AD and related tau protein diseases.

ARN25068 is a potent inhibitor of GSK-3β, FYN, and DYRK1A protein kinases, exerting its activity in the sub-micromolar range. This compound effectively addresses tau hyperphosphorylation [1].

LY3372689 (Formulaic Ia) is an orally active O-GlcNAcase (OGA) enzyme inhibitor targeting tau protein-based disorders, including Alzheimer's disease.

GSK-3 inhibitor 4 is an orally active and brain-permeable compound that acts as a triple inhibitor of GSK-3, CDK2, and CDK5, with IC50 values of 0.56 nM (GSK-3β), 0.45 nM (GSK-3α), 0.47 μM (CDK2), and 0.68 μM (CDK5). It effectively reduces Tau protein levels and can be used in the study of Alzheimer's disease.

GSK-3 inhibitor 3 is a selective, orally active, brain-permeable GSK-3 inhibitor that inhibits GSK-3α and GSK-3β with IC50s of 0.35 nM and 0.25 nM, respectively.GSK-3 inhibitor 3 reduces the phosphorylation level of tau protein S396 with an IC50 of 10 nM in a triple transgenic mouse model of Alzheimer's disease. GSK-3 inhibitor 3 reduced the phosphorylation level of tau protein S396 in a triple transgenic mouse model of Alzheimer's disease, with an IC50 of 10 nM.GSK-3 inhibitor 3 can be used for the study of neurological diseases.

Tau-aggregation and neuroinflammation-IN-1 is a potent inhibitor of tau protein aggregates, showing significant inhibitory activity against AcPHF6 and full-length tau protein aggregates. It has anti-inflammatory activity, reduces NO release, exhibits low cytotoxicity against LSP-stimulated BV2 cells, and reverses okadaic acid-induced memory impairment in rats.

IFB-088 acetate, a benzyl guanidine derivative, is used to treat diseases and cancers associated with the PPP1R15A pathway and associated with protein misfolding stress, Examples include tau disease, synaptic riboprotein disease, polyglutamine and polyalanine diseases, leukodystrophy, cystic fibrosis, multiple sclerosis, lysosome storage disorders, amyloidosis diseases, inflammation, metabolic disorders, cardiovascular diseases, osteoporosis, neurological trauma, and more.

Anandamide ((5Z,8Z,11Z,14Z)-N-(2-Hydroxyethyl)icosa-5,8,11,14-tetraenamide), an immune modulator, acts via not only cannabinoid receptors (CB1 and CB2) but also other targets (e.g., GPR18 GPR55) in the central nervous system.

H3R antagonist 4 (compound 11l) serves as a dual inhibitor of cholinesterases and histamine H3 receptors (H3R), demonstrating IC50 values of 7.04 μM (eeAChE), 9.73 μM (hAChE)(reversible), and 1.09 nM (H3R). It effectively inhibits both self and Cu2+-induced Aβ1-42 aggregation at 95.48% and 88.63%, respectively, and degrades Aβ1-42 protofibrils with 80.16% and 89.30% efficiency under similar conditions. Additionally, H3R antagonist 4 possesses the chelating capability for biometals Cu2+, Zn2+, Al3+, and Fe2+. It significantly reduces tau protein hyperphosphorylation induced by Aβ1-42, inhibits RSL-3 induced apoptosis and ferroptosis in PC12 cells, and shows optimal blood-brain barrier permeability and intestinal absorption characteristics in hCMEC D3 and hPepT1-MDCK cells, respectively. Moreover, the compound improves learning and memory impairments in an Alzheimer's mouse model induced with scopolamine.

D-688 serves as an inhibitor of Tau and Aβ. It can reverse the cytotoxicity in SH-SY5Y cells induced by Aβ1–42, displaying significant neuroprotective characteristics. Additionally, D-688 enhances the survival rate of transgenic fruit flies expressing the human tau protein isoform (2N4R).

GSK-3β Inhibitor21 (compound 44) is an ATP-competitive inhibitor of GSK-3β with an IC50 value of 6.06 µM, characterized by its ability to inhibit tau phosphorylation and prevent amyloid protein aggregation. This compound is utilized in the research of Alzheimer's disease.

JBPOS0101 modulates amyloid-beta protein, tau protein, and glial cells in Alzheimer's disease models.

Simufilamum (also known as PTI-125) is an oral small-molecule compound candidate that targets altered conformations of filamin A. It binds and reverts the misfolded filamin A in the brains of Alzheimer's disease patients, thereby slowing the disease's pathological progression. Additionally, PTI-125 reduces tau protein hyperphosphorylation, decreases Aβ42 aggregation and deposition, neurofibrillary tangles, and neuroinflammation. The compound demonstrates concentration-dependent efficacy in vitro, starting at 1 picomolar (pM), in both control groups and post-mortem hippocampal slices from Alzheimer's disease (AD) patients. PTI-125 is the first therapeutic candidate to preferentially bind and reverse pathogenic protein conformations.

BChE-IN-39 (Compound 7c) selectively inhibits butyrylcholinesterase (BChE) with an IC50 of 0.08 μM, while showing an IC50 of 3.98 μM for acetylcholinesterase (AChE) inhibition. Additionally, BChE-IN-39 downregulates GSK-3β expression, thereby inhibiting the excessive phosphorylation of tau protein.

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.

GSK-3β inhibitor24 (Compound 41) is a potent GSK-3β inhibitor with an IC50 of 0.22 nM. It increases GSK-3β phosphorylation at the Ser9 site in a dose-dependent manner and inhibits tau protein hyperphosphorylation by reducing the abundance of p-tau-Ser396. The compound upregulates β-catenin and neurogenesis-related markers (GAP43 and MAP-2), demonstrating significant anti-Alzheimer's disease (AD) activity.

Aberrant tau degrader 2 (Compound 4-12) acts as a degrader of tau protein and serves as a target protein ligand for the synthesis of PROTAC degrader C004019.

GSK3β-IN-2 (Compound S01) is an inhibitor of GSK3β with an IC50 of 0.35 nM. It activates the Wnt β-catenin signaling pathway, promoting neurogenesis and neurite outgrowth. GSK3β-IN-2 reduces tau protein phosphorylation induced by Aβ at the Ser396 site, thereby decreasing neurofibrillary tangles. Furthermore, GSK3β-IN-2 improves Alzheimer's disease symptoms in a zebrafish model.