learning

SB 202190 (FHPI) is a p38 MAPK inhibitor that inhibits p38α and p38β2 (IC50=50/100 nM) selectively and cell-permeably. SB 202190 has antitumor activity and also induces the differentiation of human embryonic stem cells into cardiomyocytes.

Octopamine hydrochloride ((±)-p-Octopamine hydrochlorid) is a biogenic monoamine structurally associated with noradrenaline. It can serve as a neurohormone, a neurotransmitter, and a neuromodulator in invertebrates.

T-448 is a specific, orally active, and irreversible inhibitor of lysine-specific demethylase 1 (LSD1, an H3K4 demethylase) with an IC50 of 22 nM.

GGTI 2147 FA, a selective GGT inhibitor, abolishes bicuculline-induced increase in dendritic spine density in hippocampal experiments and may reduce learning and memory abilities in mice.

BRD4097, a negative control in the HDAC1/2/3/8 assay, is a selective histone deacetylase (HDAC3) inhibitor that can be used to protect b-cells and improve insulin resistance, help promote cognitive function and enhance learning and memory formation.

Paeoniflorin (Peoniflorin) is a herbal constituent extracted from the root of Paeonia albiflora Pall.

Ginsenoside Rg1 (Panaxoside Rg1) is a class of steroid glycosides, and triterpene saponins found exclusively in the plant genus Panax (ginseng). It improves spatial learning and increase hippocampal synaptophysin level in mice, plus demonstrates estrogen-like activity.

Sunifiram (DM-235) is a potent nootropic agent, known for enhancing cognitive functions, memory, and learning abilities through modulating neurotransmitter activity, particularly via the AMPA receptor.

Mirisetron (WAY-100579, SEC-579) is an indole-based 5-HT3 receptor antagonist exhibiting cognitive-enhancing effects. It counteracts learning deficits associated with central cholinergic neuronal dysfunction and may be employed in studying neurological disorders such as Alzheimer's disease.

Unifiram is a nootropic agent.1It increases acetylcholine (ACh) release in the rat cerebral cortexin vivoand induces a long-lasting increase in the amplitude of field excitatory postsynaptic potentials (fEPSPs) in the rat hippocampal CA1 region (EC50= 27 nM). It does not bind to serotonin (5-HT), dopamine, muscarinic, nicotinic, adrenergic, glutamate, histamine, opioid, or GABA receptors at 1 μM. Unifiram (0.1 mg/kg) improves memory in non-memory-impaired rats in a social learning test.2It also prevents memory deficits induced by the anticholinergic agent scopolamine, nicotinic receptor antagonist mecamylamine, GABABreceptor agonist baclofen, or α2-adrenergic receptor agonist clonidine in the passive avoidance test in mice when administered at a dose of 0.01 mg/kg and prevents memory deficits induced by the AMPA/kainate glutamate receptor antagonist NBQX at 0.1 mg/kg.1 1.Romanelli, M.N., Galeotti, N., Ghelardini, C., et al.Pharmacological characterization of DM232 (unifiram) and DM235 (sunifiram), new potent cognition enhancersCNS Drug Rev.12(1)39-52(2006) 2.Ghelardini, C., Galeotti, N., Gualtieri, F., et al.The novel nootropic compound DM232 (unifiram) ameliorates memory impairment in mice and ratsDrug Develop. Res.56(1)23-32(2002)

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.

H-89 is a selective and potent protein kinase A inhibitor (IC50: 48 nM), a candidate cardioprotectant, induces spatial learning impairment in rats, and can be used to study myocardial infarction.

(S)-MCPG ((+)-MCPG) is a class I/II metabotropic glutamate receptors (mGluRs) antagonist that blocks spatial learning and long-term enhancement of the dentate gyrus in vivo in rats, and can be used to study neurological disorders.

delta-Valerobetaine is a precursor of trimethylamine N-oxide (TMAO).

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.

Lecozotan (SRA-333) is a potent and selective 5-HT antagonist developed for Alzheimer's disease treatment. This compound significantly increases the release of glutamate and acetylcholine in the hippocampus and dentate gyrus areas upon potassium ion stimulation, exhibiting cognitive enhancement properties. Long-term use of Lecozotan does not lead to tolerance or dysfunction of the 5-HT(1A) receptor, demonstrating its stable pharmacological properties. Additionally, acute administration can improve learning and memory abilities in rats without affecting their anxiety levels or behavior depression.

PDE2 inhibitor6 (Compound 1) is an orally active phosphodiesterase (PDE) inhibitor, effectively inhibiting PDE2A, PDE3B, and PDE10A2 with IC50 values of 0.95 nM, 6.17 μM (pIC50=5.21), and 87.1 nM (pIC50=7.06), respectively. It modulates AMPA receptor activity, enhances synaptic plasticity, and improves learning and memory in rat models. Furthermore, PDE2 inhibitor6 possesses blood-brain barrier permeability.

hAChE/hBACE-1-IN-1 (compounds 5d) is an orally active inhibitor of hAChE that can cross the blood-brain barrier. It effectively inhibits hAChE and hBACE-1, with IC50 values of 0.076 and 0.23 μM, respectively. Additionally, hAChE/hBACE-1-IN-1 prevents Aβ1-42 aggregation and enhances learning and memory in mice. This compound is useful in Alzheimer's disease research.

Atoxifent is a μ-opioid receptor agonist (EC50=0.39 nM), found in brain regions involved in pain control, emotion, habit learning, and cognition. It exhibits potent analgesic effects with a lower risk of respiratory depression and is useful for research in opioid pharmacology and signal transduction.

eeAChE-IN-3 (compound YS3g) is an orally bioavailable and potent inhibitor of EeAChE and IL-6, with IC50 values of 0.54 μM for EeAChE, 0.49 μM for RatAChE, 8.54 μM for RatBuChE, and 0.57 μM for IL-6. It can enhance learning and memory deficits in mice induced by STZ (streptozotocin) and shows potential for Alzheimer's disease (AD) research.

BRD6688 is a selective HDAC2 inhibitor that acts by enhancing the learning and memory processes

CGP 35348 is a selective antagonist of GABAB receptor (EC50 = 34 μM). CGP 35348 can be used in studies of neuromuscular coordination and spatial learning after neonatal brain damage in albino mice.

AR-R17779 hydrochloride is a potent, selective full agonist of the nAChR, demonstrating K i values of 92 nM for the α7 subtype and 16,000 nM for the α4β2 subtype. It is noted for its ability to enhance learning and memory in rats, suggesting potential therapeutic applications. Additionally, this compound exhibits anxiolytic properties and can mitigate inflammation by activating anti-inflammatory cholinergic (vagal) pathways [1] [2] [4].

DL-AP7, a competitive NMDA antagonist and anticonvulsant, blocks NMDA-induced convulsions and impairs learning performance in mice during a passive avoidance task [1].