2. Signaling Pathways
  3. Neuronal Signaling
  4. Monoamine Oxidase

Monoamine Oxidase

MAO

Monoamine Oxidase

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Monoamine oxidases (MAO) are a family of enzymes that catalyze the oxidation of monoamines. They are found bound to the outer membrane of mitochondria in most cell types in the body. They belong to the protein family of flavin-containing amine oxidoreductases. Monoamine oxidases catalyze the oxidative deamination of monoamines. Oxygen is used to remove an amine group from a molecule, resulting in the corresponding aldehyde and ammonia. Monoamine oxidases contain the covalently bound cofactor FAD and are, thus, classified as flavoproteins. Because of the vital role that MAOs play in the inactivation of neurotransmitters, MAO dysfunction is thought to be responsible for a number of psychiatric and neurological disorders. MAO-A inhibitors act as antidepressant and antianxiety agents, whereas MAO-B inhibitors are used alone or in combination to treat Alzheimer’sand Parkinson’s diseases.

Monoamine Oxidase Isoform Specific Products:

Monoamine Oxidase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-B1440R
    Ethaverine hydrochloride (Standard)
    		Inhibitor
    Ethaverine (hydrochloride) (Standard) is the analytical standard of Ethaverine (hydrochloride). This product is intended for research and analytical applications. Ethaverine hydrochloride, a derivative of papaverine, inhibits cardiac L-type calcium channel. Ethaverine hydrochloride is a peripheral vasodilator and antispasmodic agent. Ethaverine hydrochloride can be used for research of peripheral vascular disease.
    Ethaverine hydrochloride (Standard)
  • HY-N7603
    Rubrofusarin triglucoside
    		Inhibitor
    Rubrofusarin triglucoside is a glycoside compound isolated from Cassia obtusifolia Linn seeds. Rubrofusarin triglucoside inhibits human monoamine oxidase A (hMAO-A) with an IC50 of 85.5 μM.
    Rubrofusarin triglucoside
  • HY-168728
    MAO-B-IN-37
    		Inhibitor
    MAO-B-IN-37 (Compound 37) is a derivative of TT01001 (HY-114520), and a selective inhibitor for monoamine oxidase B (MAO-B) with an IC50 of 270 nM. MAO-B-IN-37 exhibits good metabolic stability in mice microsomes and good affinity with human serum albumin.
    MAO-B-IN-37
  • HY-120017
    Befloxatone
    		Inhibitor
    Befloxatone (MD-370503) is an orally active, selective and reversible inhibitor of Monoamine Oxidase A (MAO-A) (IC50=4 nM). Befloxatone increases the tissue level of monoamine, striatal dopamine and cortical norepinephrine. Befloxatone has antidepressant potential.
    Befloxatone
  • HY-162523
    hMAO-B-IN-8
    		Inhibitor
    hMAO-B-IN-8 (Compound 23) is a hMAO-B, eeAChE, COX-2 and 5-LOX inhibitor, with IC50 values of 0.037 μM, 0.071 μM, 14.3 μM and 0.59 μM, respectively. hMAO-B-IN-8 can be used for the research of Alzheimer's disease.
    hMAO-B-IN-8
  • HY-145708
    Dual AChE-MAO B-IN-2
    		Inhibitor
    Dual AChE-MAO B-IN-2 is a potent AChE and MAO B dual inhibitor with IC50s of 0.12 µM and 0.01 µM for b>AChE and MAO B, respectively. Dual AChE-MAO B-IN-2 has the potential for the research of Alzheimer’s disease.
    Dual AChE-MAO B-IN-2
  • HY-157981
    AChE-IN-60
    		Inhibitor
    AChE-IN-60 (compound 6k) is a potant acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitor with IC50s of 27 nM and 43 nM, respectively. AChE-IN-60 also inhibits monoamine oxidase (MAO)-A and MAO-B with IC50s of 353 nM and 716 nM, respectively.
    AChE-IN-60
  • HY-22385B
    (S)-Salsolidine
    		Inhibitor
    (S)-Salsolidine is a weak monoamine oxidase (MAO) inhibitor (Ki=63 μM). The R enantiomer of Salsolidine is more potent than the S form (Ki=26 μM).
    (S)-Salsolidine
  • HY-163322
    MAO-A inhibitor 2
    		Inhibitor
    MAO-A inhibitor 2 (compound HT4) is a monoamine oxidase A (MAO-A) inhibitor with an IC50 of 14.3 µM. MAO-A inhibitor 2 shows a less effect on MAO-B (IC50 of 106 µM) and shows almost ineffective on xanthine oxidase (XO). MAO-A inhibitor 2 can be used for the neurodegenerative disorders and oxidative stress research.
    MAO-A inhibitor 2
  • HY-146314
    MAO-B-IN-9
    		Inhibitor 99.70%
    MAO-B-IN-9 (compound 16) is a potent, selective, BBB-penetrated, irreversible and time-dependent MAO-B (monoamine oxidase B) inhibitor, with an IC50 of 0.18 μM. MAO-B-IN-9 prevents Aβ1-42-induced neuronal cell death. MAO-B-IN-9 shows neuroprotective effects, which may be the result of its Aβ1-42 anti-aggregation effects. MAO-B-IN-9 is a click chemistry reagent, itcontains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    MAO-B-IN-9
  • HY-145577
    Lafadofensine
    		Inhibitor
    Lafadofensine is the monoamines reuptake inhibitor. Lafadofensine has th sufficient effects after short-term administration (extracted from patent WO2006121218A1, compound 1).
    Lafadofensine
  • HY-158092
    ChEs/MAOs-IN-2
    		Inhibitor
    ChEs/MAOs-IN-2 (compound a11) is a cholinesterases and monoamine oxidases inhibitor with IC50 values of 0.10, 0.20, 0.30, 0.40 µM for MAO-A, MAO-B, AChE, and BChE, respectively. ChEs/MAOs-IN-2 has the potential for the research of Alzheimer's disease.
    ChEs/MAOs-IN-2
  • HY-107811A
    Harmol hydrochloride
    		Inhibitor
    Harmol hydrochloride is an orally active β-carboline alkaloid. Harmol hydrochloride is a TFEB activator and monoamine oxidase inhibitor. Harmol hydrochloride can induce cell mitosis, Autophagy and Apoptosis. Harmol hydrochloride promotes the degradation of α-synuclein by regulating the autophagy-lysosomal pathway. Harmol hydrochloride has anti-tumor, anti-depressant and anti-aging activities. Harmol hydrochloride improves motor impairment in a mouse Parkinson's disease model.
    Harmol hydrochloride
  • HY-144758
    LSD1-IN-17
    		Inhibitor
    LSD1-IN-17 (compound 5b) is a potent LSD1 inhibitor. LSD1-IN-17 can inhibit LSD1-CoREST, MAO-A and MAO-B, with IC50 values of 0.005, 0.028, and 0.820 μM, respectively. LSD1-IN-17 displays cell growth arrest in prostate cancer LNCaP cells, with an IC50 of 17.2 μM.
    LSD1-IN-17
  • HY-N4037
    Homopterocarpin
    		Inhibitor
    Homopterocarpin is an isoflavonoid that can be isolated from Pterocarpus erinaceus. Homopterocarpin has hepatoprotective and antioxidant properties. Homopterocarpin is a competitive reversible inhibitor of human monoamine oxidase-B with an IC50 and a Ki of 0.72 and 0.21 μM for hMAO-B, respectively. Homopterocarpin can be used for the research of liver injury and oxidative stress.
    Homopterocarpin
  • HY-101392S1
    Harmane-d2
    		Inhibitor
    Harmane-d2 is the deuterium labeled Harmane. Harmane, a β-Carboline alkaloid (BCA), is a potent neurotoxin that causes severe action tremors and psychiatric manifestations. Harmane shows 1000-fold selectivity for I1-Imidazoline receptor (IC50=30 nM) over α2-adrenoceptor (IC50=18 μM). Harmane is also a potent and selective inhibitor of monoamine oxidase (MAO) (IC50s=0.5 and 5 μM for human MAO A/B, respectively).
    Harmane-d<sub>2</sub>
  • HY-119885A
    (±)-Amiflamine
    		Inhibitor 99.23%
    (±)-Amiflamine (FLA 336) is a potent monoamine oxidase-A (MAO-A) inhibitor with a pIC50 of 5.57.
    (±)-Amiflamine
  • HY-147953
    MAO-B-IN-13
    		Inhibitor
    MAO-B-IN-13 (compound 12a) is a highly potent, reversible and blood-brain barrier (BBB) penetrant MAO-B inhibitor with an IC50 value of 10 nM. MAO-B-IN-13 has neuroprotective and antioxidant activity. MAO-B-IN-13 can be used for researching Parkinson’s disease.
    MAO-B-IN-13
  • HY-B1199A
    Nialamide hydrochloride
    		Inhibitor
    Nialamide hydrochloride is a non-selective monoamine oxidase (MAO) inhibitor. Nialamide hydrochloride inhibits MAO and regulates ROS production. Nialamide hydrochloride induces hyperkinesis in animals, enhances the anticonvulsant effect of Diphenylhydantoin in mice, increases rectal temperature, and enhances the pressor effect of Norepinephrine. Nialamide hydrochloride can be used in the research of depression, inflammatory diseases, neurodegenerative diseases, and hypertension.
    Nialamide hydrochloride
  • HY-15386
    Cimoxatone
    		Inhibitor
    Cimoxatone (MD 780515) is a reversible, selectively and orally active type A monoamine oxidase (MAO-A) inhibitor. Cimoxatone enhances the anorectic action of Serotonin (HY-B1473A).
    Cimoxatone
Cat. No. Product Name / Synonyms Application Reactivity
Monoamine Oxidase Isoform Comparison

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