作者:Ornella Gia、Sebastiano Marciani Magno、Humberto Gonzalez-Diaz、Elias Quezada、Lourdes Santana、Eugenio Uriarte、Lisa Dalla Via
DOI:10.1016/j.bmc.2004.10.044
日期:2005.2
The QSAR directed synthesis of tetracyclic psoralen derivatives (3-5) characterised by the condensation of a cyclopentane ring at the level of the 3,4 double bond of the tricyclic psoralen moiety is reported. The new compounds present a methoxy (3). a hydroxy (4) or a dimethylaminopropoxy (5) side chain inserted in position 8 of the lead chromophore. The evaluation of photoantiproliferative activity on human tumour cell lines reveals for 5 an ability to inhibit cell growth significantly higher with respect to that of the reference drug, 8-MOP. Interestingly, the enhancement in antiproliferative activity is accompanied by the disappearance of skin phototoxicity. On the other hand, no significant photobiological activity was scored for 3 and 4. The ability to photoreact with DNA. evaluated by isolating the 4',5' monoadduct and by estimating the ability to form interstrand cross-links, appeared to be significant for 5. practically negligible for 3 and 4. Furthermore, a back-projection of the more active compound identifies structural features suitable for further synthetic modifications. (C) 2004 Elsevier Ltd. All rights reserved.