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At the molecular level, 5-amino-1MQ functions as a competitive inhibitor of NNMT, demonstrating remarkable potency with an IC of 1.2 0.1 M under standard assay conditions (50 M SAM, 100 M nicotinic acid). This represents a dramatic 10-fold improvement over the parent compound 1-methylquinolinium, achieved through strategic amino group substitution that enhances binding affinity to the NNMT active site. The compound's mechanism centers on preventing the methylation of nicotinamide to 1-methylnicotinamide (1-MNA), thereby preserving nicotinamide for recycling back to NAD+ through the salvage pathway. This intervention effectively blocks what researchers have termed the "NNMT metabolic drain" a process that simultaneously depletes NAD+ precursors and consumes cellular methylation capacity
Sepesi B, Nelson DB, Mitchell KG, Gibbons DL, Heymach JV, Vaporciyan AA, Swisher SG , Roszik J
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Cardiovascular benefits include significant reductions in systolic and diastolic blood pressure (mean systolic reduction of 9.9 mm Hg in non-diabetic adults and 6.5 mm Hg in those with diabetes), improved lipid profiles, and lower C-reactive protein levels, all of which are relevant for cardiovascular risk reduction
Regarding P38 activation, similar profiles were obtained in WT and Gstp1/2 / mice
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