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

Monoamine Oxidase


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:

Cat. No. Product Name Effect Purity
  • HY-Y1750
    Inhibitor 99.99%
    β-Aminopropionitrile (BAPN) is a specific, irreversible and orally active lysyl oxidase (LOX) inhibitor. β-Aminopropionitrile targets the active site of LOX or LOXL isoenzymes.
  • HY-N0529
    Rosmarinic acid
    Inhibitor 99.23%
    Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and COMT enzymes with IC50s of 50.1, 184.6 and 26.7 μM, respectively.
  • HY-B1496
    Tranylcypromine hemisulfate
    Inhibitor 99.94%
    Tranylcypromine (SKF 385) hemisulfate is an irreversible, nonselective monoamine oxidase (MAO) inhibitor used in the treatment of depression. Tranylcypromine hemisulfate is also a lysine-specific demethylase 1 (LSD1) inhibitor, suppresses lesion growth and improves generalized hyperalgesia in mouse with induced endometriosis. Tranylcypromine has antidepressant effects.
  • HY-100546A
    GSK-LSD1 dihydrochloride
    Inhibitor ≥98.0%
    GSK-LSD1 dihydrochloride is a potent, selective and irreversible lysine specific demethylase 1 (LSD1) inhibitor with an IC50 of 16 nM.
  • HY-14197A
    Clorgyline hydrochloride
    Inhibitor 99.70%
    Clorgyline hydrochloride is an irreversible and selective inhibitor of monoamine oxidase A (MAO-A) that is used in scientific research; structurally related to Pargyline.
  • HY-17447A
    Tranylcypromine hydrochloride
    Tranylcypromine hydrochloride (SKF 385 hydrochloride) is an irreversible inhibitor of lysine-specific demethylase 1 (LSD1/BHC110) and monoamine oxidase (MAO). Tranylcypromine hydrochloride inhibits LSD1, MAO A and MAO B with IC50s of 20.7, 2.3 and 0.95 μM, respectively. Tranylcypromine hydrochloride can be used for the research of depression.
  • HY-138625B
    LOX-IN-3 dihydrochloride monohydrate
    LOX-IN-3 dihydrochloride monohydrate (Compound 33) is an orally active lysyl oxidase (LOX) inhibitor. LOX-IN-3 dihydrochloride monohydrate can be used for fibrosis, cancer and angiogenesis research.
  • HY-P99047
    Simtuzumab (AB 0024; GS 6624) is a monoclonal antibody directed against Lysyl oxidase like-2 (LOXL2). Simtuzumab can be used for the research of primary sclerosing cholangitis (PSC).
  • HY-14536
    Methylene Blue
    Inhibitor 98.08%
    Methylene blue (Basic Blue 9) is a guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS) inhibitor. Methylene blue is a vasopressor and is often used as a dye in several medical procedures. Methylene blue through the nitric oxide syntase/guanylate cyclase signalling pathway to reduce prepulse inhibition. Methylene blue is a REDOX cycling compound and able to cross the blood-brain barrier. Methylene blue is a Tau aggregation inhibitor. Methylene blue reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
  • HY-N0453
    Inhibitor ≥98.0%
    Hypericin is a naturally occurring substance found in Hyperlcurn perforatum L. Hypericin is an inhibitor of PKC (protein kinase C), MAO (monoaminoxidase), dopamine-beta-hydroxylase, reverse transcriptase, telomerase and CYP (cytochrome P450). Hypericin shows antitumor, antiviral, antidepressive activities, and can induce apoptosis.
  • HY-N0159
    Inhibitor 99.98%
    Paeonol is an active extraction from the root of Paeonia suffruticosa, Paeonol inhibits MAO-A and MAO-B with IC50 of 54.6 μM and 42.5 μM, respectively.
  • HY-114286A
    PXS-5153A monohydrochloride
    Inhibitor 99.67%
    PXS-5153A monohydrochloride is a potent, selective, orally active and fast-acting lysyl oxidase like 2/3 enzymatic (LOXL2/LOXL3) inhibitor, with an IC50 of <40 nM for LOXL2 across all mammalian species and an IC50 of 63 nM for human LOXL3. PXS-5153A monohydrochloride could reduce crosslinks and ameliorates fibrosis.
  • HY-A0091
    Pargyline hydrochloride
    Inhibitor 99.91%
    Pargyline hydrochloride is an irreversible monoamine oxidase (MAO) inhibitor with Kis of 13 μM and 0.5 μM for MAO-A and MAO-B, respectively. Pargyline hydrochloride has antihypertensive and anticancer activities.
  • HY-13779
    Inhibitor 99.87%
    J-147 is an exceptionally potent, orally active, neuroprotective agent for cognitive enhancement. J-147 can readily pass the blood brain barrier (BBB). J-147 can inhibit monoamine oxidase B (MAO B) and the dopamine transporter with EC50 values of 1.88 μM and 0.649 μM, respectively. J-147 has potential for the treatment of Alzheimer’s disease (AD).
  • HY-14605
    Rasagiline mesylate
    Inhibitor 99.66%
    Rasagiline (R-AGN1135) mesylate is a highly potent selective irreversible mitochondrial monoamine oxidase (MAO) inhibitor with IC50s of 4.43 nM and 412 nM for rat brain MAO B and A activity, respectively.
  • HY-101771A
    (2-Chloropyridin-4-yl)methanamine hydrochloride
    (2-Chloropyridin-4-yl)methanamine hydrochloride is a selective LOXL2 inhibitor with an IC50 of 126 nM.
  • HY-107422
    PAT-1251 is a potent, selective and oral lysyl oxidase-like 2 (LOXL2) inhibitor, with IC50s of 0.71 and 1.17 μM for hLOXL2 and hLOXL3, respectively, and also potently inhibits mouse, rat, and dog LOXL2 (IC50s, 0.10, 0.12, and 0.16 μM, respectively); PAT-1251 is used in the research of fibrotic diseases.
  • HY-112726
    Inhibitor 99.66%
    PXS-4728A (BI-1467335) is a selective, orally active inhibitor of semicarbazide-sensitive amine oxidase (SSAO). PXS-4728A ameliorates chronic obstructive pulmonary disease in mice.
  • HY-19333
    Inhibitor 99.55%
    OG-L002 is a potent and highly selective LSD1 inhibitor with an IC50 of 0.02 μM. OG-L002 is a potent monoamine oxidases (MAO) inhibitor with IC50s of 1.38 μM and 0.72 μM for MAO-A and MAO-B, respectively. OG-L002 potently inhibits the expression of HSV IE genes.
  • HY-70057
    Inhibitor 99.95%
    Safinamide is a potent, selective, and reversible monoamine oxidase B (MAO-B) inhibitor (IC50=0.098 µM) over MAO-A (IC50=580 µM). Safinamide also blocks sodium channels and modulates glutamate (Glu) release, showing a greater affinity at depolarized (IC50=8 µM) than at resting (IC50=262 µM) potentials. Safinamide has neuroprotective and neurorescuing effects and can be used for the study of parkinson disease, ischemia stroke etc.al.

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