For research use only. Not for therapeutic Use.
L-NMMA acetate is a nitric oxide synthase inhibitor of all NOS isoforms including NOS1, NOS2, and NOS3. The Ki values for nNOS (rat), eNOS (human), and iNOS (mouse) are approximately 0.18, 0.4, and 6 µM, respectively.
L-NMMA, starting from 100 μM, produces a concentration-dependent inhibition of the evoked relaxations (2Hz); maximal inhibition at 1 mM averaged about 35%. The inhibitory effect of L-NMMA is unchanged by previous incubation with D-arginine while it is prevented by L-arginine (L-Arg). L-NMMA does not affect isoprenaline-induced relaxation[2]. Superfusion of L-NMMA reduces arteriolar diameter and causes dose-dependent increases in arteriolar tone. The onset of action of L-NMMA is nearly immediate. L-NMMA inhibits vasodilator responses to the endothelium-dependent vasodilator ACh but not to the endothelium-independent NP. NE induced dose-related vasoconstriction that is significantly potentiated by L-NMMA[3].
| Catalog Number | R000287 |
| CAS Number | 53308-83-1 |
| Synonyms | acetic acid;(2S)-2-amino-5-[(N’-methylcarbamimidoyl)amino]pentanoic acid |
| Molecular Formula | C9H20N4O4 |
| Purity | ≥95% |
| InChI | InChI=1S/C7H16N4O2.C2H4O2/c1-10-7(9)11-4-2-3-5(8)6(12)13;1-2(3)4/h5H,2-4,8H2,1H3,(H,12,13)(H3,9,10,11);1H3,(H,3,4)/t5-;/m0./s1 |
| InChIKey | IKPNWIGTWUZCKM-JEDNCBNOSA-N |
| SMILES | CC(=O)O.CN=C(N)NCCCC(C(=O)O)N |
| Reference | [1]. Frey C, et al. L-thiocitrulline. A stereospecific, heme-binding inhibitor of nitric-oxide synthases. J Biol Chem. 1994 Oct 21;269(42):26083-91. [2]. Maggi CA, et al. Effect of NG-monomethyl L-arginine (L-NMMA) and NG-nitro L-arginine (L-NOARG) on non-adrenergic non-cholinergic relaxation in the circular muscle of the human ileum. Br J Pharmacol. 1991 Aug;103(4):1970-2. [3]. Nakamura T, et al. Effect of NG-monomethyl-L-arginine on arcade arterioles of rat spinotrapezius muscles. Am J Physiol. 1991 Jul;261(1 Pt 2):H46-52. |
