[125I]-N-[(3-Azido-5-iodo)benzyl]dantrolene and [125I]-N-{[3-Iodo-5-(3-trifluoromethyl-3H-diazirin-3-yl)]benzyl}dantrolene: photoaffinity probes specific for the physiological Ca2+ release from sarcoplasmic reticulum of skeletal muscle
作者:Takamitsu Hosoya、Hiroshi Aoyama、Takaaki Ikemoto、Toshiyuki Hiramatsu、Yasutaka Kihara、Makoto Endo、Masaaki Suzuki
DOI:10.1016/s0960-894x(02)00701-1
日期:2002.11
In order to capture and identify key molecules that regulate the release of Ca2+ from the sarcoplasmic reticulum (SR) of skeletal muscle, we designed specific photoaffinity probes based on the structural modification of dantrolene. Thus, GIF-0082 and GIF-0276 possessing azido- and trifluoromethyldiazirinyl-benzyl groups, respectively, at the hydantoin moiety were found to have a highly selective inhibitory effect on physiological Ca2+ release (PCR) without affecting Ca2+-induced Ca2+ release (CICR). Successful realization of the sharp discrimination between PCR and CICR has led to the creation of [I-125]GIF-0082 and [I-125]GIF-0276, which were synthesized by substituting a stannyl group with I-125 in the corresponding phenylstannane precursors. (C) 2002 Published by Elsevier Science Ltd.