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Synthesis and Biological Properties of a 1-(6-Aziridinylhexyl)-2-phenylindole, a Potential Fluorescence Label for Estrogen Receptors

✍ Scribed by Sebastian Erber; Herbert Birnböck; Erwin Von Angerer


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
455 KB
Volume
323
Category
Article
ISSN
0365-6233

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✦ Synopsis


Phenyliiole derivative 8. linked to aziridine by a hexamethylene spacer group, was synthesized and tested. It binds to the estrogen receptor with an MA-value of 4.0 (estradiol = 100). In v i m , it shows a selective cytostatic activity in hormone-dependent MCF-7 breast cancer cells (41% T/C at 10' M). In vivo, it exem a strong estrogenic effect. The binding to the estrogen receptor is largely reversible.

Synthese und biologische Eigenschaften eines l-(dAziridinylhexy1)-2phenylindols, ein potentieller Fluoreszenzmarker fur Ostrogenrezeptoren Das 2-Phenylindolderivat 8, das iiber eine Hexamethylengruppe mit einem Aziridin verbunden ist, wurde synthetisiert und gepriift. Es bindet mit einem RBA-Wert von 4.0 (Esmdiol= 100) an den 8strogemzeptor. In virro zeigt es eine selektive cytostatische Wirkung an hormonabhilngigen MCF-7 Brustkrebszellen In vivo beobachtet man einen starken btrogenen Effekt. Die Bindung an den 6strogemzeptor ist weitgehend reversibel.

Affinity labeling agents, capable of forming covalent bonds with hormone binding sites, have proved to be useful in characterizing the physicochemical properties, inhacellular dynamics, and mode of action of steroid hormone receptors"2'. The aziridinyl group was applied successfully as electrophilic function for the labeling of estrogen receptors (ER)3-5'. It has been demonstrated that tritium labeled tamoxifen aziridine binds irreversibly to the receptorf).


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