Phenylethanolamine N-methyltransferase inhibition: re-evaluation of kinetic data
摘要:
Inhibitors of phenylethanolamine N-methyltransferase [PNMT, the enzyme that catalyzes the final step in the biosynthesis of epinephrine (Epi)] may be of use in determining the role of Epi in the central nervous system. Here we demonstrate that a routinely used assay for screening PNMT inhibitors is not appropriate for those inhibitors having K-i values less than 1 muM. A revised assay has been developed that shows some inhibitors bind two orders of magnitude more tightly than previously reported. (C) 2004 Elsevier Ltd. All rights reserved.
Phenylethanolamine N-methyltransferase inhibition: re-evaluation of kinetic data
摘要:
Inhibitors of phenylethanolamine N-methyltransferase [PNMT, the enzyme that catalyzes the final step in the biosynthesis of epinephrine (Epi)] may be of use in determining the role of Epi in the central nervous system. Here we demonstrate that a routinely used assay for screening PNMT inhibitors is not appropriate for those inhibitors having K-i values less than 1 muM. A revised assay has been developed that shows some inhibitors bind two orders of magnitude more tightly than previously reported. (C) 2004 Elsevier Ltd. All rights reserved.
A compound of the formula [I]
wherein R1, R2 and R3 are the same or different and each is hydrogen atom,
wherein each symbol is as defined in the specification, a salt thereof or a prodrug thereof. The compound of the present invention, a salt thereof and a prodrug thereof are useful as factor Xa inhibitor and blood coagulation inhibitor, and are useful for the prophylaxis and/or treatment of diseases caused by blood coagulation or thrombus.
Provision of a novel amidine derivative or a pharmaceutically acceptable salt thereof having an activated blood coagulation factor X-inhibitory activity. A compound represented by the formula (I)
wherein each symbol is as defined above, or a pharmaceutically acceptable salt thereof.
Compounds represented by general formula [I] or salts thereof or prodrugs of the same [I] wherein R1, R2 end R3 are the same or different and each represents hydrogen, hydroxy, lower alkyl or aryl; and R represents formulas (a), (b) and (c) (wherein each symbol has the meaning as defined in the specification). These compounds, salts thereof or prodrugs of the same are useful as factor Xa inhibitors and anticoagulants and usable in preventing and/or treating diseases caused by blood coagulation or thrombi.
通式[I]代表的化合物或其盐类或其原药[I],其中R1、R2和R3是相同或不同的,各自代表氢、羟基、低级烷基或芳基;R代表式(a)、(b)和(c)(其中各符号具有说明书中定义的含义)。这些化合物、其盐类或其原药可作为 Xa 因子抑制剂和抗凝剂,用于预防和/或治疗由血液凝固或血栓引起的疾病。