The Ras inhibitor S-trans, trans-farnesylthiosalicylic acid (FTS, Salirasib) interferes with Ras membrane interactions that are crucial for Ras-dependent transformation. It remains unknown whether modifications of the carboxyl group of FTS can affect its activity. Here we show that specific modifications of the FrS carboxyl group by esterification or amidation yield compounds with improved growth inhibitory activity, compared to FTS, as shown in Panc-1 and U87 cells. The most potent compounds were FTS-methoxymethyl ester and FTS-amide. However, selectivity toward active Ras-GTP, as known for FrS, was apparent with the amide derivatives of FTS. FTS-amide exhibited the overall highest efficacy in inhibition of Ras-GTP and cell growth. This new compound significantly inhibited growth of both Panc-1 tumors and U87 brain tumors. Thus amide derivatives of the FTS carboxyl group provide potent cell-growth inhibitors without loss of selectivity toward the active Ras protein and may serve as new candidates in cancer therapy.
TREATMENT OF MULTIPLE SCLEROSIS
申请人:Ramot at Tel-Aviv University Ltd
公开号:EP2523668A1
公开(公告)日:2012-11-21
TREATMENT OF DELAYED CUTANEOUS HYPERSENSITIVITY CONDITIONS WITH S-FARNESYLTHIOSALICYLIC ACID AND ANALOGS THEREOF
申请人:Ramot at Tel-Aviv University Ltd.
公开号:EP2590639A1
公开(公告)日:2013-05-15
USE OF FTS AND ANALOGS TO TREAT NON-AUTOIMMUNE-ALLERGIC AND NON-ALLERGIC INFLAMMATORY CONDITIONS