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Piclozotan (anhydrous), a 5-HT1A receptor agonist, demonstrated significant neuroprotective activity in a transient middle cerebral artery occlusion (t-MCAO) model, ameliorating motor complications in patients with advanced Parkinson's disease.

Pinokalant (LOE-908) is a novel non-selective cation channel inhibitor.Pinokalant significantly reduces cortical infarct volume in in vivo experiments, improves the metabolic and electrophysiological status of the ischemic penumbra region, and reduces the size of the lesion on magnetic resonance images in the acute phase after middle cerebral artery occlusion in rats.Pinokalant is a potential SARS-CoV-2 protease inhibitor for the study of stroke.

Pramipexole (SND 919) is a selective dopamine receptor agonist used in the therapy of Parkinson disease. Pramipexole therapy is associated with a low rate of transient serum enzyme elevations during treatment but has not been implicated in cases of clinically apparent acute liver injury.

2,2,2-Trichloroethanol, the active form of the sedative hypnotic drug chloral hydrate, is an agonist for the nonclassical K2P channels TREK-1 (KCNK2) and TRAAK (KCNK4). It activates a nonclassical potassium channel in cerebrovascular smooth muscle and dilates the middle cerebral artery [1]. [1]. Nikhil K Parelkar, et al. 2,2,2-trichloroethanol Activates a Nonclassical Potassium Channel in Cerebrovascular Smooth Muscle and Dilates the Middle Cerebral Artery. J Pharmacol Exp Ther. 2010 Mar;332(3):803-10.

Pramipexole dihydrochloride hydrate (Mirapex) is the hydrochloride salt of pramipexole, a benzothiazole derivative. As a nonergot dopamine agonist, pramipexole binds to D2 and D3 dopamine receptors in the striatum and substantia nigra of the brain.

EIDD-1931 (Beta-d-N4-hydroxycytidine) is a ribonucleoside analog with antiviral activity that inhibits the replication of severe acute respiratory syndrome coronavirus [SARS-CoV] in Vero 76 cells, Middle East respiratory syndrome coronavirus [MERS-CoV] in Calu-3 2B4 cells, and SARS-CoV-2 in Vero cells (IC50s = 0.1, 0.15, and 0.3 μM, respectively).

Dihydrocapsaicin (CCRIS1589) is isolated from Capsicum fruit. Capsaicin is the primary active component of the heat and pain-eliciting lipid soluble fraction of the Capsicum pepper. Like capsaicin, dihydrocapsaicin is an irritant. Capsaicin is found in natural hot pepper extracts along with a number of impurities, including dihydrocapsaicin and several lesser impurities. Separation by HPLC is required in order to obtain pure dihydrocapsaicin. Dihydrocapsaicin represents about 10% of the compound present in commercial preparations purporting to be pure capsaicin, but it has about the same pungency as capsaicin. VR1 (vanilloid receptor 1) is a heat activated calcium ion channel which functions as a part of the normal nociceptive pain pathway. Capsaicin elicits a sensation of burning pain by activation of VR1 on small, non-myelinated polymodal C-type nociceptive nerve fibers. The potency of dihydrocapsaicin at VR1 appears equivalent to capsaicin. Antioxidant. Reduces oxidation of serum lipids. Mutagenic. Dihydrocapsaicin is an activator of VR1.

The quinuclidine PHA 568487 free base is an agonist of the alpha 7 nicotinic acetylcholine receptor that was designed to mitigate the bioactivation associated with the core scaffold and subsequently remove associated liabilities with in vivo tolerability.

MTP 131 is a mitochondria-targeted peptide antioxidant.1,2It localizes to the mitochondria and reducestert-butyl hydroperoxide-induced lipid peroxidation and apoptosis in SH-SY5Y cells when used at concentrations ranging from 0.001 to 1 nM.1MTP 131 (2 mg kg) reduces infarct volume, hemispheric swelling, and glutathione (GSH) depletion in a mouse model of acute cerebral ischemia induced by middle cerebral artery occlusion (MCAO).2It increases survival, improves motor function, and decreases degeneration of the lumbar spinal cord in a superoxide dismutase 1 mutant (SOD1G93A) transgenic mouse model of amyotrophic lateral sclerosis (ALS) when administered at a dose of 5 mg kg. MTP 131 reduces albuminuria, urinary hydrogen peroxide levels, and mesangial matrix accumulation, as well as preserves superoxide production, in adb dbmouse model of diabetic nephropathy.3 1.Zhao, K., Luo, G., Giannelli, S., et al.Mitochondria-targeted peptide prevents mitochondrial depolarization and apoptosis induced by tert-butyl hydroperoxide in neuronal cell linesBiochem. Pharmacol.70(12)1796-1806(2005) 2.Szeto, H.H.Mitochondria-targeted peptide antioxidants: Novel neuroprotective agentsAAPS J.8(3)E521-E531(2006) 3.Miyamoto, S., Zhang, G., Hall, D., et al.Restoring mitochondrial superoxide levels with elamipretide (MTP-131) protects db db mice against progression of diabetic kidney diseaseJ. Biol. Chem.295(21)7249-7260(2020)

Bumetanide (PF 1593) is a potent sulfamoylanthranilic acid derivative belonging to the class of loop diuretics. In the brain, bumetanide may prevent seizures in neonates by blocking the bumetanide-sensitive sodium-potassium-chloride cotransporter (NKCC1), thereby inhibiting chloride uptake thus, decreasing the internal chloride concentration in neurons and may block the excitatory effect of GABA in neonates.

SMND-309, a metabolite of salvianolic acid B, exhibits neuroprotective effects in cultured neurons and in rats subjected to permanent middle cerebral artery occlusion.

CXM102 is an activator of autophagy. This compound induces autophagy in aged BMSCs, rejuvenating them and promoting their preferential differentiation into osteoblasts. CXM102 enhances the nuclear translocation of transcription factor EB (TFEB) and the formation of osteoblasts. In middle-aged male mice, it stimulates bone anabolic metabolism, reduces marrow adipocytes, delays bone loss, lowers serum inflammation levels, reduces organ fibrosis, and extends lifespan.

Neuroprotective agent 6 (Compound Y12) functions as an antioxidant and displays prominent neuroprotective effects in both oxygen-glucose deprivation reperfusion (OGD R) induced cell models and transient middle cerebral artery occlusion (tMCAO) induced animal models. Additionally, this compound shows significant metal chelating activity towards Cu2+.

KUS121 is a valosin-containing protein (VCP) modulator that inhibits VCP ATPase activity (IC50= 330 nM).1It inhibits cell death, ATP depletion, and upregulation of C/EBP-homologous protein (CHOP) induced by tunicamycin, an inducer of ER stress, in HeLa cells when used at concentrations of 20, 50, and 50 μM, respectively. KUS121 (100 μM) inhibits ATP depletion and cell death induced by oxygen-glucose deprivation (OGD) in rat primary cortical neurons in anin vitromodel of cerebral ischemia.2It reduces infarction volume and increases the latency to fall in an accelerating rotarod test in a mouse model of focal cerebral ischemia induced by transient distal middle cerebral artery occlusion (MCAO) when administered at a dose of 100 mg/kg immediately following occlusion and again at 50 mg/kg following reperfusion. KUS121 (50 mg/kg) inhibits thinning of the retinal outer nuclear layer and preserves visual function in an rd10 mouse model of retinitis pigmentosa.1 1.Ikeda, H.O., Sasaoka, N., Koike, M., et al.Novel VCP modulators mitigate major pathologies of rd10, a mouse model of retinitis pigmentosaSci. Rep.45970(2014) 2.Kinoshita, H., Maki, T., Yasuda, K., et al.KUS121, a valosin-containing protein modulator, attenuates ischemic stroke via preventing ATP depletionSci. Rep.9(1)11519(2019)

L-Palmitoylcarnitine chloride (Palmitoyl-L-carnitine chloride) is a fatty acid metabolite with antithrombotic properties that protects mice from ischemic stroke by counteracting intracerebral thrombosis in the tMCAO model.L-Palmitoylcarnitine chloride (Palmitoyl-L-carnitine chloride) is a fatty acid metabolite with antithrombotic properties. Palmitoylcarnitine chloride inhibits the Na K pump in the heart and inhibits FeCl 3-induced arterial thrombosis Attenuates intracerebral thrombosis and inflammation in a mouse model of transient middle cerebral artery occlusion (tMCAO).

Blancoxanthone is a molecule isolated from plants could also be potential drug candidates against COVID-19. Moreover, these could also show promising inhibitory effects against influenza-parainfluenza viruses, respiratory syncytial virus, severe acute respiratory syndrome (SARS), and Middle East respiratory syndrome coronavirus (MERS-CoV).

Rizatriptan-d6 is intended for use as an internal standard for the quantification of rizatriptan by GC- or LC-MS. Rizatriptan is an agonist of the serotonin receptor subtypes 5-HT1B and 5-HT1D. It is selective for 5-HT1B and 5-HT1D receptors over 5-HT1A receptors. Rizatriptan induces vasoconstriction in isolated human middle meningeal arteries. In vivo, rizatriptan reduces head grooming, the number of oculotemporal strokes, eye blinking, and one-eye closures in a Cacna1a mutant transgenic mouse model of migraine. Formulations containing rizatriptan have been used in the treatment of migraine.

LFHP-1c is a novel PGAM5 inhibitor that shows neuroprotective activity in an ischemic stroke model, preventing BBB destruction after transient middle cerebral artery occlusion (tMCAO) in rats.LFHP-1c can be used to study cerebral ischemic stroke.

EE epitope, a biologically active peptide, is a fragment (314 to 319 amino acids) of the middle T antigen from mouse polyomavirus and is frequently utilized as an epitope tag. Pyroglutamyl (pGlu) peptides, which can arise spontaneously at the N-terminus from either Glutamine (Q) or Glutamic acid (E), are recognized for potentially enhancing peptide stability through the hydrophobic γ-lactam ring of pGlu, particularly against gastrointestinal proteases. Such peptides, as a normal variant, are accounted for within peptide purity assessments during HPLC analysis.

Tat-Gap 19, a peptide inhibitor of connexin43 (Cx43) hemichannels, is derived from the HIV-1 Tat protein transduction domain fused with a nine-amino acid sequence from Cx43 residues 128-136. This compound, at a concentration of 10 µM, effectively suppresses glutamate-induced ATP release in primary rat hepatocytes, indicating inhibition of Cx43 hemichannel activity. Furthermore, Tat-Gap 19 demonstrates therapeutic potential by significantly reducing infarct volume in a mouse cerebral ischemia-reperfusion injury model following middle cerebral artery occlusion (MCAO) at a dosage of 25 mg/kg. Moreover, its intraperitoneal administration at 1 mg/kg per day ameliorates fibrosis and decreases the area of hepatic stellate cells, the precursors to myofibroblasts, expressing α-smooth muscle actin (α-SMA), in a model of thioacetamide-induced liver damage. Additionally, it enhances superoxide dismutase (SOD) activity in hepatic cells from the treated mice, indicating its antioxidative benefits.

Myelin oligodendrocyte glycoprotein (MOG) peptide, a truncated form of MOG located on the extracellular myelin sheath surface, interacts with antigen serotype HLA-DR2 to mitigate effects of ischemic stroke induced by middle cerebral artery occlusion (MCAO) in mice. In female mice, it notably reduces cortical and striatal infarct volumes, lessens sensorimotor deficits as observed in tube- and corner turn tests, enhances engagement with novel odors, and prolongs the duration of cage mate-directed vocalizations, without exhibiting similar outcomes in male mice.

Tat-NTS peptide, a cell-penetrating compound, comprises the HIV-1 Tat protein transduction domain fused with a 10-amino acid sequence (residues 228-237) from the repeat III domain of annexin A1, serving as a nuclear translocation signal (NTS). This peptide hinders the interaction between annexin A1 and importin β, obstructing annexin A1's nuclear entry in primary mouse hippocampal neurons. Tat-NTS effectively prevents apoptosis triggered by glucose-oxygen deprivation and reperfusion in these neurons. When administered in vivo at a dosage of 10 mg/kg, it significantly reduces infarct size, minimizes neuronal apoptosis, and improves navigation performance in the Morris water maze test for mice subjected to ischemia-reperfusion injury via middle cerebral artery occlusion (MCAO).

Tat-CIRP, a peptide inhibitor, impedes the protein-protein interaction between myeloid differentiation 2 (MD-2), also known as lymphocyte antigen 96 (LY96), and cold-inducible RNA binding protein (CIRP) by binding to MD-2. This disrupts the MD-2 and CIRP interaction as confirmed in co-immunoprecipitation assays. Notably, in vivo studies reveal that Tat-CIRP, at dosages of 10 and 20 mg/kg, significantly reduces infarct volume in both a mouse model of middle cerebral artery occlusion (MCAO) and a rhesus monkey model of thrombosis-induced stroke. Additionally, it improves motor function, evidenced by decreased time to manipulate and withdraw food with the affected arm in the primate model.

Tat-M2NX, a peptide antagonist of transient receptor potential melastatin 2 (TRPM2), blocks hydrogen peroxide-induced calcium influx in HEK293 cells expressing human TRPM2 at concentrations between 25 to 100 µM. In male mice models of stroke caused by middle cerebral artery occlusion (MCAO), Tat-M2NX (20 mg/kg) demonstrates efficacy in reducing brain infarct volume when applied before or 3 hours-post occlusion, yet it shows no such effect in female mice.