申请人:Duke University
公开号:US06359182B1
公开(公告)日:2002-03-19
A C-nitroso compound having a molecular weight ranging from about 225 to about 1,000 (from about 225 to about 600 for oral administration) on a monomeric basis wherein a nitroso group is attached to a tertiary carbon, which is obtained by nitrosylation of a carbon acid having a pKa less than about 25, is useful as an NO donor. When the compound is obtained from a carbon acid with a pKa less than about 10, it provides vascular relaxing effect when used at micromolar concentrations and this activity is potentiated by glutathione to be obtained at nanomolar concentrations. When the compound is obtained from a carbon acid with a pKa ranging from about 15 to about 20, vascular relaxing effect is obtained at nanomolar concentrations without glutathione. The compound is preferably water-soluble and preferably contains a carbon alpha to the nitrosylated carbon which is part of a ketone group. In one embodiment, the C-nitroso compound is obtained by nitrosylation of a conventional drug or such drug modified to modify the carbon acid pKa thereof When such drug is a nonsteroidal anti-inflammatory drug, the resulting C-nitroso compound functions as a COX-1 and COX-2 inhibitor without the deleterious effects associated with COX-1 inhibition but with the advantageous effects associated with COX-1 and COX-2 inhibition. One such C-nitroso compound is a nitrosoketoibuprofen. A specific example of this kind of compound is isolated as dimeric 2-[4′-(&agr;-nitroso)isobutyrylphenyl] propionic acid. In another case, the C-nitroso compound contains the moiety
where X is S, O or NR One embodiment is directed to COX-2 inhibitors where a tertiary carbon atom and/or an oxygen atom and/or a sulfur atom is nitrosylated.
一种分子量在约225至约1,000之间(口服时为约225至约600)的C-亚硝基化合物,以单体为基础,其中亚硝基连接到三级碳上,通过对pKa小于约25的碳酸的亚硝基化获得,可用作NO供体。当该化合物从pKa小于约10的碳酸中获得时,在微摩尔浓度下使用时提供血管松弛效果,并且谷胱甘肽可以增强该活性,使其在纳摩尔浓度下获得。当该化合物从pKa在约15到约20之间的碳酸中获得时,在不使用谷胱甘肽的情况下,在纳摩尔浓度下获得血管松弛效果。该化合物最好是水溶性的,最好包含与硝化碳的碳α相连的酮基团。在一种实施例中,通过对常规药物或改变其碳酸pKa的药物进行亚硝基化来获得C-亚硝基化合物。当这种药物是非甾体抗炎药时,所得到的C-亚硝基化合物作为COX-1和COX-2抑制剂,没有与COX-1抑制相关的有害效果,但具有与COX-1和COX-2抑制相关的有益效果。其中一种C-亚硝基化合物是亚硝基酮布洛芬。这种化合物的一个具体例子是二聚体2-[4'-(α-亚硝基)异丁酰苯基]丙酸。在另一种情况下,C-亚硝基化合物包含X为S、O或NR的基团。其中一种实施例是针对COX-2抑制剂,其中三级碳原子和/或氧原子和/或硫原子被亚硝化。