4- and 6-(p-Sulphamoylphenyl)androstenediones: Studies of aromatase inhibitor-based oestrone sulphatase inhibition
摘要:
4-(p-Sulphamoylphenyl)androstenedione (3) and 6 alpha-p-sulphamoylphenyl analogues 12-14 were synthesised and tested as aromatase inhibitors as well as oestrone sulphatase inhibitors in human placental microsomes. All of the p-sulphamoylphenyl compounds synthesised were powerful inhibitors of aromatase with apparent K-i values ranging between 30 and 97 nM. In addition, the aromatase inhibitory activities of 6 alpha-p-hydroxyphenyl compounds 9-11, which may be produced from their respective sulphamoylphenyl compounds by action of oestrone sulphatase, were also high in a range of 23 and 75 nM of the K-i values. On the other hand, all of the sulphamoylphenyl compounds were poor inhibitors of oestrone sulphatase with more than about 200 mu M of IC25 values. Although the present findings of the oestrone sulphatase inhibition are disappointing, such attempts may be valuable to develop a new class of drugs having a dual function, aromatase inhibitor and oestrone sulphatase inhibitor, for the treatment of oestrogen-dependent breast cancer. (C) 2010 Elsevier Inc. All rights reserved.