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Per-claim provenance."}],"not_medical_advice":true},"slug":"5-amino-1mq","title":"5-amino-1MQ blocks the enzyme that throws away vitamin B3, and three currencies move at once","register":"canonical","tags":["5-amino-1mq","NNMT","NAD+","SAM","polyamines","preclinical"],"updated_at":"2026-08-05T09:39:22.724Z","body_excerpt":"5-amino-1MQ blocks an enzyme that sits at a junction between three different things your cells need: the molecule that carries energy transactions, the molecule that donates methyl groups, and a set of small compounds called polyamines. Blocking it in obese mice made them lose fat. It has never been given to a person in a published trial.\n\nThat is the whole compound in three sentences, and the interesting part is not the fat loss. It is the junction.\n\n## What NNMT actually does, and why blocking it does several things at once\n\nThe enzyme is nicotinamide N-methyltransferase, NNMT. Its job is simple to state: it takes nicotinamide — a form of vitamin B3 — and attaches a methyl group to it. A methyl group is a single carbon with three hydrogens, the smallest chemical tag cells use to mark things. The result is 1-methylnicotinamide, which the cell then excretes.\n\nSo NNMT is a disposal enzyme. It takes vitamin B3 and throws it away in a form that cannot be recycled.\n\nNow look at what it consumes doing that, because this is where the compound gets interesting. The Nature paper that identified the target explains it precisely: \"NNMT methylates nicotinamide (vitamin B3) using S-adenosylmethionine (SAM) as a methyl donor. Nicotinamide is a precursor of NAD(+), an important cofactor linking cellular redox states with energy metabolism. SAM provides propylamine for polyamine biosynthesis and donates a methyl group for histone methylation.\"\n\nUnpack that and you get three separate consequences of one enzyme running.\n\n**It destroys NAD⁺ precursor.** Nicotinamide is the raw material your cell uses to make NAD⁺, the molecule that carries electrons in every energy-producing reaction you run. Methylating nicotinamide takes it permanently out of that supply chain. Every NAD⁺ booster sold — nicotinamide riboside, NMN, plain niacinamide — is an attempt to push more material into the front of that chain. Inhibiting NNMT is an attempt to stop material leaking out of the back of it.\n\n**It burns through SAM.** S-adenosylmethionine is the cell's universal methyl donor. It is what marks DNA and histones — the proteins your DNA is wound around — and those marks determine which genes are switched on. Every methylation reaction in your cell competes for the same SAM pool. An enzyme consuming SAM at high rates to dispose of vitamin B3 is spending a budget that gene regulation also draws on.\n\n**It competes with polyamine synthesis.** SAM also supplies propylamine for making polyamines — spermidine and spermine — which the paper notes have \"a major role in energy metabolism.\"\n\nSo one enzyme, three currencies. Inhibit it and all three should move at once. That is unusual, and it is why NNMT attracted interest as a target rather than as a curiosity.\n\n## The finding that started it\n\nThe 2014 Nature paper did not set out to study NNMT. It was looking at Glut4, the glucose transporter that fat cells lose in obesity and diabetes. Using gene arrays across mice engineered to lack or overexpress Glut4 in fat, the authors found \"that nicotinamide N-methyltransferase (Nnmt) is the most strongly reciprocally regulated gene.\"\n\nMost strongly, out of the whole array. That is the kind of result that redirects a laboratory. Then: \"We report that NNMT expression is increased in WAT and liver of obese and diabetic mice.\"\n\nAnd the experiment that made it a drug target: \"Nnmt knockdown in WAT and liver protects against diet-induced obesity by augmenting cellular energy expenditure.\"\n\nNote the mechanism named in that sentence. Not reduced appetite — increased energy expenditure. The mice were not eating less; their cells were spending more.\n\nThe paper then traced the pathway all the way through, and this is why it is a genuinely strong piece of work rather than an association. \"NNMT inhibition increases adipose SAM and NAD(+) levels and upregulates ODC and SSAT activity as well as expression, owing to the effects of NNMT on histone H3 lysine 4 methylation in adipose tissue.\" So th","ranking":"safety-first (interaction_risk/limitations), then quote-gated effective_weight","claims":[{"id":"c9","text":"No human trial of 5-amino-1MQ has been published — no phase I, no safety study, no pharmacokinetic run — and the deepest mechanistic evidence comes from genetic knockdown rather than from the drug.","tier":"human","interaction_risk":false,"status":"active","source_ids":["s1","s6"],"why_material":"It separates what is known about the target from what is known about the compound. The mechanism is well established; the molecule has been tested in mice and nowhere else.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.8,"quote_gated":false},{"id":"c1","text":"NNMT is a disposal enzyme: it methylates nicotinamide, vitamin B3, into a form the cell excretes and cannot recycle back into NAD+.","tier":"mechanistic","interaction_risk":false,"status":"active","source_ids":["s2"],"why_material":"It frames the compound correctly. Inhibiting NNMT blocks a leak out of the NAD+ pathway, which is a different intervention from the NAD+ boosters that push more precursor into the front of it.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.3,"quote_gated":false},{"id":"c2","text":"One enzyme consumes three currencies at once — NAD+ precursor, the shared SAM methyl pool, and the propylamine that polyamine synthesis draws on — so blocking it moves all three together.","tier":"mechanistic","interaction_risk":false,"status":"active","source_ids":["s2"],"why_material":"This is the whole reason NNMT is a target rather than a curiosity, and it is also why the unstudied consequences are not a formality: a shared methyl budget is being reallocated.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.3,"quote_gated":false},{"id":"c3","text":"NNMT emerged as the most strongly reciprocally regulated gene in a DNA array study that was investigating Glut4, not NNMT.","tier":"animal","interaction_risk":false,"status":"active","source_ids":["s5"],"why_material":"The target was found rather than hypothesised, which is a stronger provenance than a mechanism reasoned into existence and then tested.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c4","text":"Genetic knockdown of Nnmt in white adipose tissue and liver protected mice from diet-induced obesity by increasing cellular energy expenditure, not by reducing food intake.","tier":"animal","interaction_risk":false,"status":"active","source_ids":["s1"],"why_material":"The named mechanism is expenditure, which is what the biochemistry predicts and what makes the result internally consistent rather than merely favourable.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c5","text":"The 2014 pathway was traced end to end: freed SAM changed histone H3 lysine 4 methylation, which upregulated the polyamine enzymes ODC and SSAT.","tier":"animal","interaction_risk":false,"status":"active","source_ids":["s3"],"why_material":"It is the step that turns an association into a mechanism, and it is also the clearest evidence that this compound changes gene marking in a tissue rather than adjusting a single metabolic number.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c6","text":"The predicted polyamine metabolite diacetylspermine appeared in urine and adipocyte secretion, and the increase in oxygen consumption disappeared when the polyamine enzymes were blocked.","tier":"animal","interaction_risk":false,"status":"active","source_ids":["s4"],"why_material":"A predicted metabolite that appears, plus an effect that vanishes when the proposed pathway is cut, is as close to demonstrated causation as an animal study gets.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c7","text":"5-amino-1MQ was first tested as a molecule in living animals in 2018, in mice that were already obese, by injection over days.","tier":"animal","interaction_risk":false,"status":"active","source_ids":["s6"],"why_material":"It is the only dosing evidence that exists for the compound, and it is in mice by injection — so any human protocol quoted for it was invented rather than derived.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c8","text":"Membrane permeability was the real obstacle rather than binding, because 5-amino-1MQ carries a permanent positive charge and NNMT is inside the cell; it was measured two independent ways.","tier":"in-vitro","interaction_risk":false,"status":"active","source_ids":["s7"],"why_material":"It identifies what the 2018 paper actually achieved, and it is why the compound is a small charged aromatic molecule rather than the peptide it is routinely sold as.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c10","text":"NNMT expression in adipocytes is itself regulated by glucose availability, with glucose deprivation raising it about twofold.","tier":"cell","interaction_risk":false,"status":"active","source_ids":["s8"],"why_material":"The enzyme being blocked responds to nutritional state, so baseline diet is an uncontrolled variable in any effect and nobody has quantified it.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false}],"sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Nnmt knockdown in WAT and liver protects against diet-induced obesity by augmenting cellular energy expenditure.","summary":"Kraus et al., Nature 2014. The paper that made NNMT a target. Note the named mechanism: increased energy expenditure, not reduced appetite. This is genetic knockdown, not the drug.","claim_ids":[],"hash":"9d042c569bd8f77b080ceb70070b69f9de82f239eb0e8383e4a23b7e7685911d"},{"id":"s2","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"NNMT methylates nicotinamide (vitamin B3) using S-adenosylmethionine (SAM) as a methyl donor. Nicotinamide is a precursor of NAD(+), an important cofactor linking cellular redox states with energy metabolism. SAM provides propylamine for polyamine biosynthesis and donates a methyl group for histone methylation.","summary":"The three currencies one enzyme consumes. Why blocking one disposal enzyme moves three things at once: NAD+ precursor stops being destroyed, the shared methyl budget stops being spent on disposal, and polyamine synthesis stops competing for it. This is the reason NNMT is interesting rather than incidental.","claim_ids":[],"hash":"1f2b86e9788cbef81e6fe495fa0c6f7844557de36c0fd3d9fd52b73c5786d9ea"},{"id":"s3","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"NNMT inhibition increases adipose SAM and NAD(+) levels and upregulates ODC and SSAT activity as well as expression, owing to the effects of NNMT on histone H3 lysine 4 methylation in adipose tissue.","summary":"The pathway traced from histone mark to urinary metabolite. The freed methyl budget showed up as changed histone marks, and those marks turned up the polyamine enzymes. This is the step that makes the paper a mechanism rather than an association — and the reason to take the unstudied long-term consequences seriously, since gene marking is what changed.","claim_ids":[],"hash":"e307d1913a0c6196c81bd26e2870c2fd1919a30d43c15048f1676fdd16cbc337"},{"id":"s4","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Direct evidence for increased polyamine flux resulting from NNMT inhibition includes elevated urinary excretion and adipocyte secretion of diacetylspermine, a product of polyamine metabolism.","summary":"The predicted waste product, found in urine. They predicted a specific metabolite should appear if the model was right, and it appeared. Oxygen consumption then rose in an ODC-, SSAT- and PAO-dependent manner, so blocking the polyamine enzymes abolished the effect — the pathway is load-bearing rather than incidental.","claim_ids":[],"hash":"7c36d242e640b091f5ed2b55f4a8a941f8a570190acf6e443a0e601431d21929"},{"id":"s5","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Here we show, using DNA array analyses, that nicotinamide N-methyltransferase (Nnmt) is the most strongly reciprocally regulated gene when comparing gene expression in white adipose tissue (WAT) from adipose-specific Glut4-knockout or adipose-specific Glut4-overexpressing mice with their respective controls.","summary":"How the target was found — it was not being looked for. The study was about Glut4, the glucose transporter fat cells lose in obesity. NNMT came out of the array as the most strongly regulated gene of all, which is the kind of result that redirects a laboratory.","claim_ids":[],"hash":"c1948f6bc0442ac8f93061a5ca43b25fa939889101f3e4fddd2e61fbce11fabe"},{"id":"s6","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/29155147/","title":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice","quote":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice.","summary":"Neelakantan et al., Biochem Pharmacol 2018. The first test of 5-amino-1MQ as a molecule in living animals. Three words carry the work: membrane-permeable, because NNMT is inside the cell; selective, or the effect is not attributable to NNMT; reverse, because the mice were already obese when treatment began.","claim_ids":[],"hash":"0394f5e87ebfacc3fd0bf46bee5eadee3ed278b3d1ebca74a1e89865e5f52219"},{"id":"s7","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/29155147/","title":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice","quote":"Membrane permeability of NNMT inhibitors was characterized using parallel artificial membrane permeability and Caco-2 cell assays. Selectivity was tested against structurally-related methyltransferases and nicotinamide adenine dinucleotide (NAD+) salvage pathway enzymes.","summary":"What the 2018 paper actually measured before claiming an effect. Permeability measured two independent ways, selectivity measured against exactly the enzymes most likely to confound the result. This is a careful drug-discovery paper rather than an enthusiastic one, and the permeability was the real obstacle — the compound carries a permanent positive charge.","claim_ids":[],"hash":"b0bcc1bb5709ac364bbd8159823339e397401940d223c516b86036bf5c2ee945"},{"id":"s8","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/32112869/","title":"Glucose availability regulates nicotinamide N-methyltransferase expression in adipocytes","quote":"Glucose deprivation of 3T3-L1 adipocytes induced a 2-fold increase in","summary":"Ehebauer et al., Life Sci 2020. The enzyme this compound blocks is itself under nutritional control — glucose deprivation raised its expression twofold in cultured adipocytes. So baseline diet is a variable in any effect, and nobody has measured how large a one.","claim_ids":[],"hash":"5375dbbbc7f3c6d1f8b669b9e5d12de125b2603d0ef20a7fc7618650caee995e"}],"anecdotal_sources":[],"scientific_sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Nnmt knockdown in WAT and liver protects against diet-induced obesity by augmenting cellular energy expenditure.","summary":"Kraus et al., Nature 2014. The paper that made NNMT a target. Note the named mechanism: increased energy expenditure, not reduced appetite. This is genetic knockdown, not the drug.","claim_ids":[],"hash":"9d042c569bd8f77b080ceb70070b69f9de82f239eb0e8383e4a23b7e7685911d"},{"id":"s2","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"NNMT methylates nicotinamide (vitamin B3) using S-adenosylmethionine (SAM) as a methyl donor. Nicotinamide is a precursor of NAD(+), an important cofactor linking cellular redox states with energy metabolism. SAM provides propylamine for polyamine biosynthesis and donates a methyl group for histone methylation.","summary":"The three currencies one enzyme consumes. Why blocking one disposal enzyme moves three things at once: NAD+ precursor stops being destroyed, the shared methyl budget stops being spent on disposal, and polyamine synthesis stops competing for it. This is the reason NNMT is interesting rather than incidental.","claim_ids":[],"hash":"1f2b86e9788cbef81e6fe495fa0c6f7844557de36c0fd3d9fd52b73c5786d9ea"},{"id":"s3","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"NNMT inhibition increases adipose SAM and NAD(+) levels and upregulates ODC and SSAT activity as well as expression, owing to the effects of NNMT on histone H3 lysine 4 methylation in adipose tissue.","summary":"The pathway traced from histone mark to urinary metabolite. The freed methyl budget showed up as changed histone marks, and those marks turned up the polyamine enzymes. This is the step that makes the paper a mechanism rather than an association — and the reason to take the unstudied long-term consequences seriously, since gene marking is what changed.","claim_ids":[],"hash":"e307d1913a0c6196c81bd26e2870c2fd1919a30d43c15048f1676fdd16cbc337"},{"id":"s4","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Direct evidence for increased polyamine flux resulting from NNMT inhibition includes elevated urinary excretion and adipocyte secretion of diacetylspermine, a product of polyamine metabolism.","summary":"The predicted waste product, found in urine. They predicted a specific metabolite should appear if the model was right, and it appeared. Oxygen consumption then rose in an ODC-, SSAT- and PAO-dependent manner, so blocking the polyamine enzymes abolished the effect — the pathway is load-bearing rather than incidental.","claim_ids":[],"hash":"7c36d242e640b091f5ed2b55f4a8a941f8a570190acf6e443a0e601431d21929"},{"id":"s5","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/24717514/","title":"Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity","quote":"Here we show, using DNA array analyses, that nicotinamide N-methyltransferase (Nnmt) is the most strongly reciprocally regulated gene when comparing gene expression in white adipose tissue (WAT) from adipose-specific Glut4-knockout or adipose-specific Glut4-overexpressing mice with their respective controls.","summary":"How the target was found — it was not being looked for. The study was about Glut4, the glucose transporter fat cells lose in obesity. NNMT came out of the array as the most strongly regulated gene of all, which is the kind of result that redirects a laboratory.","claim_ids":[],"hash":"c1948f6bc0442ac8f93061a5ca43b25fa939889101f3e4fddd2e61fbce11fabe"},{"id":"s6","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/29155147/","title":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice","quote":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice.","summary":"Neelakantan et al., Biochem Pharmacol 2018. The first test of 5-amino-1MQ as a molecule in living animals. Three words carry the work: membrane-permeable, because NNMT is inside the cell; selective, or the effect is not attributable to NNMT; reverse, because the mice were already obese when treatment began.","claim_ids":[],"hash":"0394f5e87ebfacc3fd0bf46bee5eadee3ed278b3d1ebca74a1e89865e5f52219"},{"id":"s7","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/29155147/","title":"Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice","quote":"Membrane permeability of NNMT inhibitors was characterized using parallel artificial membrane permeability and Caco-2 cell assays. Selectivity was tested against structurally-related methyltransferases and nicotinamide adenine dinucleotide (NAD+) salvage pathway enzymes.","summary":"What the 2018 paper actually measured before claiming an effect. Permeability measured two independent ways, selectivity measured against exactly the enzymes most likely to confound the result. This is a careful drug-discovery paper rather than an enthusiastic one, and the permeability was the real obstacle — the compound carries a permanent positive charge.","claim_ids":[],"hash":"b0bcc1bb5709ac364bbd8159823339e397401940d223c516b86036bf5c2ee945"},{"id":"s8","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/32112869/","title":"Glucose availability regulates nicotinamide N-methyltransferase expression in adipocytes","quote":"Glucose deprivation of 3T3-L1 adipocytes induced a 2-fold increase in","summary":"Ehebauer et al., Life Sci 2020. The enzyme this compound blocks is itself under nutritional control — glucose deprivation raised its expression twofold in cultured adipocytes. 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