NO Synthase Inhibitor

Centrolobol is a diarylheptane compound with antioxidant and anti-inflammatory properties, which exists in the fermented stems of Alnus sibirica. Centrolobol scavenges DPPH free radicals and inhibits the production of NO in LPS-stimulated immune cells. Centrolobol can be used in studies related to anti-inflammation and antioxidation.

GYY4137 (GMP) is the GMP-grade version of GYY4137 (HY-107632). Small molecules of GMP grade can be used as adjuvant reagents in cell therapy. GYY4137 (GMP) is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GYY4137 (GMP) can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.

Vulgarin is an orally active, naturally occurring eudesmane sesquiterpene with multiple biological activities including anti-inflammatory and antioxidant properties. Vulgarin targets and inhibits HMGB1, NF-κB and iNOS, while regulating key genes involved in hepatic gluconeogenesis; it also blocks inflammatory signaling pathways and inhibits the production and release of pro-inflammatory cytokines such as TNF-α and IL-1β. Vulgarin effectively alleviates pancreatic oxidative stress by reducing lipid peroxidation levels and restoring antioxidant enzyme activity. Vulgarin reverses abnormally elevated serum pancreatic enzyme levels, preserves the integrity of pancreatic acinar cells, and reduces pancreatic edema, hemorrhage and inflammatory infiltration. Vulgarin remodels the function of pancreatic endocrine cells, restores insulin content in β cells, and downregulates glucagon levels in α cells and somatostatin levels in δ cells. Vulgarin can be used in studies related to pancreatic injury and diabetes.

Paroxetine-d₄ (BRL29060-d₄) is the deuterated-labeled Paroxetine (HY-122272). Paroxetine (BRL29060) is an orally active and selective serotonin reuptake inhibitor (SSRI) and apoptosis inducer with blood-brain barrier permeability. Paroxetine inhibits nitric oxide synthase and CYP2D6, induces desensitization of 5-HT1A/1B/1D autoreceptors, downregulates 5-HT2 receptors, and promotes the production of inflammatory cytokines. Paroxetine is a weak norepinephrine (NE) uptake inhibitor and possesses antitumor activity. Paroxetine is widely used in research concerning depression, obsessive-compulsive disorder, panic disorder, social phobia, generalized anxiety disorder, post-traumatic stress disorder, premenstrual dysphoric disorder, hot flashes, and related conditions.

Hedopeptolide can be found in the marine cyanobacteria Okeania sp. Hedopeptolide inhibits LSP-induced NO production in RAW264.7 cells (IC₅₀: 4 μM). Hedopeptolide exhibits anti-inflammatory activity.

L-NAPNA is a nitric oxide synthase (NOS) inhibitor with an IC₅₀ of 1.4 μM. L-NAPNA exhibits analgesic effects by inhibiting formalin-induced paw licking behavior in mice (ED₅₀ of 57.2 mg/kg) and suppressing acetic acid-induced abdominal writhing in mice (ED₅₀ of 25 mg/kg). L-NAPNA can be used in research related to central nervous system diseases.

O‑Methylnotoptol is a Coumarin (HY-N0709) isolated from the roots and rhizomes of Notopterygium incisum. O‑Methylnotoptol inhibits LPS‑induced nitric oxide production in RAW 264.7 murine macrophages with an IC₅₀ value of 23.9 μM.

Nω-Propyl-L-arginine (Standard) is the analytical standard of Nω-Propyl-L-arginine (HY-102062). This product is intended for research and analytical applications. Nω-Propyl-L-arginine (N-omega-Propyl-L-arginine) is a potent, competitive, and highly selective inhibitor of neuronal nitric oxide synthase (nNOS), with a K_i of 57 nM. Nω-Propyl-L-arginine displays a 149-fold selectivity for nNOS over endothelial NOS (eNOS).

Cinnamyl Alcohol-d₅ is deuterated labeled Cinnamyl Alcohole (HY-Y0045). Cinnamyl Alcohol is an active component from chestnut flower, inhibits increased PPARγ expression, exhibits anti-obesity, antioxidant and anti-inflammatory activities.

VR11 aptamer is a DNA-based TNF-α inhibitor with a K_D of 7.0 nM. VR11 aptamer prevents TNFα-induced apoptosis and NO production. VR11 aptamer has non-immunogenicity and does not raise immune responses when injected intraperitoneally into C57BL/6 mice model. VR11 aptamer can be used for inflammatory diseases research.

α-Guanidinoglutaric acid is a guanidino compound first found in cobaltinduced epileptogenic focus tissue in the cerebral cortex of cats. α-Guanidinoglutaric acid induces epileptic seizures in rats after intraventricular administration.

Agnuside (Standard) is the analytical standard of Agnuside. This product is intended for research and analytical applications. Agnuside is used in the study of asthma, inflammation, and angiogenic diseases. Agnuside is an orally active compound that can be extracted from Vitex negundo.

3β,7β,15α-Trihydroxy-4-(hydroxymethyl)-11,23-dioxo-lanost-8-en-26-oic acid is a triterpene compound that can be found in Ganoderma lucidum, and it inhibits nitric oxide (NO) production in BV-2 microglial cells induced by lipopolysaccharide (LPS, HY-D1056), with an IC₅₀ of 4.15 μM.

Pratol (7-Hydroxy-4'-methoxyflavone) is an NF-κB inhibitor. Pratol also inhibits NO, PGE₂, TNF-α, IL-1β, and IL-6 production. Pratol increases the phosphorylation of p38 MAPK, JNK, and ERK, decreases AKT phosphorylation, and upregulates MITF, tyrosinase, TRP-1, and TRP-2 through a PKA-dependent signaling pathway. Pratol reduces iNOS and COX-2 protein expression, inhibits p65 phosphorylation, and protects IκBα from degradation, thereby inhibiting NF-κB nuclear translocation. Pratol can be used in research on hypopigmentary disorders, inflammatory diseases, cervical cancer, and colon cancer.

Ethylnotopterol is a coumarin found in the roots and rhizomes of Notopterygium incisum and an inhibitor with an IC₅₀ value of 18.1 μM for LPS-induced nitric oxide production. Ethylnotopterol blocks LPS-induced nitric oxide production in macrophage cells.

Cornuside (Standard) is the analytical standard of Cornuside (HY-N0631). This product is intended for research and analytical applications. Cornuside is an iridoid glycoside with anti-allergic, anti-inflammatory, and neuroprotective activities. Cornuside exerts anti-allergic activity by downregulating the p38 MAPK, JNK, and NF-κB signaling pathways, and inhibits IgE-mediated histamine release from mast cells. Cornuside improves cognitive impairment in mice by inhibiting BACE1 activity (IC₅₀ = 55.84 μg/mL) and enhancing ChAT activity. Cornuside inhibits LPS (HY-D1056)-induced inflammatory mediators, including iNOS, COX-2, PGE2, TNF-α, IL-6, and IL-1β, by suppressing NF-κB activation.

L-Canavanine (sulfate) (Standard) is the analytical standard of L-Canavanine (sulfate). This product is intended for research and analytical applications. L-Canavanine sulfate is a selective inhibitor of inducible NO synthase.

Licoflavanone (3′-Prenylnaringenin) is a flavanone with antioxidant, anti-inflammatory and anticancer activities. Licoflavanone can be isolated from the leaf extract of Glycyrrhiza glabra. Licoflavanone downregulates the mTOR/PI3K/AKT signaling pathway to inhibit the proliferation, migration and invasion of cancer cells, while activates Bax, Bad and multiple caspase enzymes to induce apoptosis. Its anti-inflammatory effect is manifested by reducing the nuclear translocation of NF-κB, decreasing the phosphorylation levels of p38, JNK and ERK1/2, thereby inhibiting the expression of nitric oxide, proinflammatory cytokines, COX-2 and iNOS. Licoflavanone is used in studies on nasopharyngeal carcinoma and related mechanisms.

Paeonidanin is a monoterpenoid glycoside with an IC₅₀ > 100 μM for nitric oxide production inhibition in lipopolysaccharide-activated microglia and macrophages. Paeonidanin suppresses lipopolysaccharide-induced production of nitric oxide, interleukin-6, and tumor necrosis factor alpha in macrophages and microglia.Paeonidanin can be used for the research of inflammation.

Corydaldine is a alkaloid. Corydaldine inhibits the production of NO in the BV2 cell line when stimulated by LPS.^[1]