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-130205
    Milacemide hydrochloride
    		Inhibitor
    Milacemide hydrochloride (CP 1552 S), a glycinamide derivative, is an orally active MAO-B inhibitor with anticonvulsant activity. Milacemide hydrochloride reduces the levels of dihydroxyphenylacetic acid and homovanilic acid, but increases the levels of dopamine and serotonin in the caudate nucleus. Milacemide hydrochloride is promising for research of Alzheimer's disease.
    Milacemide hydrochloride
  • HY-161240
    MAO-B-IN-30
    		Inhibitor 98.53%
    MAO-B-IN-30 (compound IS7) is a potent, selective and cross the blood-brain barrier MAO-B inhibitor with IC50 values of 19.176, 0.082 µM for MAO-A and MAO-B, respectively. MAO-B-IN-30 shows antiproliferative activity and non-cytotoxic. MAO-B-IN-30 reduces TNF-alpha, IL-6, NF-kB levels. MAO-B-IN-30 has the potential for the research of Parkinson's disease.
    MAO-B-IN-30
  • HY-176271
    MAO-B-IN-45
    		Inhibitor
    MAO-B-IN-45 is a dual inhibitor of ferroptosis and MAO-B. MAO-B-IN-45 shows selectivity towards MAO-B with an IC50 of 87.47 nM and selectivity exceeding 229-fold for MAO-B over MAO-A. MAO-B-IN-45 has excellent antiferroptosis activity through modulation of the iron metabolic pathway and GSH-GPX4 axis in vitro. MAO-B-IN-45 improves cognitive and behavioral impairments in 3×Tg (APP/Tau/Ps1) AD mouse and significantly reduced the levels of ferritin heavy chain 1 (FTH1), APP, and Tau phosphorylation (p-Tau) proteins in the brain.
    MAO-B-IN-45
  • HY-143330
    MAO-B-IN-4
    		Inhibitor
    MAO-B-IN-4 (Compound 26) is an orally active and reversible MAO-B inhibitor with an IC50 of 9 nM. MAO-B-IN-4 has good metabolic stability, safety profile and brain permeability. MAO-B-IN-4 shows antidepressant activity in rats and mice. MAO-B-IN-4 can be used in studies related to Alzheimer's disease.
    MAO-B-IN-4
  • HY-162573
    Monoamine Oxidase B inhibitor 5
    		Inhibitor
    Monoamine Oxidase B inhibitor 5 (Compound 16d) is a selective and reversible inhibitor for monoamine oxidase B (hMAO-B) with an IC50 of 67.3 nM and a Ki of 82.5 nM. Monoamine Oxidase B inhibitor 5 exhibits good pharmacokinetic characters and weak toxicity in rats model. Monoamine Oxidase B inhibitor 5 alleviates MPTP-induced (HY-15608) motor impairment in Parkinson’s mouse model. Monoamine Oxidase B inhibitor 5 is blood-brain barrier (BBB) penetrate.
    Monoamine Oxidase B inhibitor 5
  • HY-149408
    MAOA-IN-1
    		Inhibitor
    MAOA-IN-1 (compound 15) is an orally active MAOA inhibitor with cytotoxicity against prostate cancer cells. MAOA-IN-1 has Caco-2 permeability and lower CNS permeability. MAOA-IN-1 can be further used in the research of anti-cancer and anti-inflammatory indications.
    MAOA-IN-1
  • HY-119395
    Kynuramine
    Kynuramine is an endogenous amine that serves as a fluorescent substrate and probe for plasma amine oxidase.
    Kynuramine
  • HY-163618
    DHMQ
    DHMQ is a NIR fluorescent probe that binds to the propylamino group of monoamine oxidase A (MAO-A). DHMQ tracks MAO-A activity in real-time by using fluorescence imaging on mice and cells.
    DHMQ
  • HY-170798
    Monoamine Oxidase B inhibitor 6
    		Inhibitor
    Monoamine Oxidase B inhibitor 6 (Compound BT5) is a BBB-penetrable, highly selective, reversible and competitive MAO-B inhibitor, with an IC50 of 0.11 μM. Monoamine Oxidase B inhibitor 6 has antioxidant and neuroprotective effects and can be used in the research of neurodegenerative diseases.
    Monoamine Oxidase B inhibitor 6
  • HY-144673
    LSD1-IN-12
    		Inhibitor
    LSD1-IN-12 (compound 2) is a potent LSD1 inhibitor, with Ki values of 1.1 μM (LSD1), 61 μM (LSD2), 2.3 μM (MAO-A), and 3.5 μM (MAO-B), respectively.
    LSD1-IN-12
  • HY-146312
    AChE/BChE/MAO-B-IN-1
    		Inhibitor 99.57%
    AChE/BChE/MAO-B-IN-1 is a reversible and non-time-dependent AChE, BChE and MAO-B inhibitor with IC50 values of 7.31, 0.56 and 26.1 μM for hAChE, hBChE and hMAO-B, respectively. AChE/BChE/MAO-B-IN-1 can cross the BBB and shows neuroprotective effects without cytotoxicity.
    AChE/BChE/MAO-B-IN-1
  • HY-155330
    PZ-1922
    		Inhibitor
    PZ-1922 (Compound 16) is a BBB-penetrable 5-HT6R/5-HT3R antagonist (Ki: 17 nM, 0.45 nM for 5-HT6R/5-HT3R respectively). PZ-1922 reversibly inhibits MAO-B (pIC50: 8.93). PZ-1922 reverses Scopolamine (SCOP) (HY-N0296) induced memory deficits in the novel object recognition (NOR) test in rats. PZ-1922 prevents Aβ-induced memory decline in the T-maze test.
    PZ-1922
  • HY-162606
    MAO-A/B-IN-3
    		Inhibitor
    MAO-A/B-IN-3 (Compound 12) stands out as a key dual MAO-AChE inhibitor, displaying excellent multi-target efficacy against MAO-A, MAO-B, and AChE with IC50 values of 67 nM, 29 nM, and 1370 nM respectively. MAO-A/B-IN-3 is adept at altering the A site (hydrophobic ring) and C site (semicarbazone chain) within ketone amine-based MTDLs to bolster the inhibitory potential against MAO-A/B while notably diminishing activity against AChE. MAO-A/B-IN-3 is poised for research applications in the field of neurodegenerative diseases.
    MAO-A/B-IN-3
  • HY-131624
    LON 954
    		Inhibitor
    LON 954, a tremorogenic agent, is a reversible monoamine oxidase (MAO) inhibitor. LON 954 inhibits MAO activity in various tissue preparations.
    LON 954
  • HY-W335927
    MAO-B-IN-19
    		Inhibitor
    MAO-B-IN-19 is a selective MAO-B inhibitor with an IC50 of 0.67 μM. MAO-B-IN-19 shows neuroprotective and anti-inflammatory properties.
    MAO-B-IN-19
  • HY-148159
    Safrazine
    		Inhibitor
    Safrazine is an irreversible, non-specific and orally active monoamine oxidase (MAO) inhibitor. Safrazine can be used for the research of depression.
    Safrazine
  • HY-160002
    MAO-B-IN-27
    		Inhibitor
    MAO-B-IN-27 (Compound 12c) is a monoamine oxidase B (MAO-B) inhibitor. MAO-B-IN-27 has potent and selective MAO-B inhibitory effect for hMAO-B with an IC50 values of 8.9 nM. MAO-B-IN-27 can be used for the research of parkinson's disease (PD).
    MAO-B-IN-27
  • HY-174834
    MAO-B-IN-44
    		Inhibitor
    MAO-B-IN-44 (Compound 4n) is a selective monoamine oxidase B (MAO-B) inhibitor targetin with an IC50 value of 1.01 μM, showing weak inhibition on MAO-A (IC50=14.4 μM). MAO-B-IN-44 reduces degradation of neurotransmitters like dopamine. MAO-B-IN-44 is promising for research of neurodegenerative diseases related to MAO-B abnormalities such as Parkinson’s disease.
    MAO-B-IN-44
  • HY-157517
    MAO-B-IN-29
    		Inhibitor
    MAO-B-IN-29 (compound 9a) is a inhibitor against MAO-B activity.
    MAO-B-IN-29
  • HY-Y1750A
    β-Aminopropionitrile hydrochloride
    		Inhibitor
    β-Aminopropionitrile (BAPN) hydrochloride is a specific, irreversible and orally active lysyl oxidase (LOX) inhibitor. β-Aminopropionitrile hydrochloride targets the active site of LOX or LOXL isoenzymes.
    β-Aminopropionitrile hydrochloride
Cat. No. Product Name / Synonyms Application Reactivity
Monoamine Oxidase Isoform Comparison

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