CAMBIO DE DISCURSO : ADIÓS A LA SEGUNDA LÍNEA SCLC-ES EN EEUU Y EN EU ...CAMBIAMOS DISCURSO A MANTENIMIENTO EN FIRTS-LINE /// SI NO EXISTIERA IMFORTE ... AHORA MISMO PHARMAMAR ESTARÍA ANTE UNA GRAVE SITUACIÓN /// IMFORTE EN EU DE UN TAM DE 600 MILLONES A UN MERCADO REAL MUCHO MENOR QUE PODRÍA SER DE TAN SOLO UNOS 85 MILLONES /// 2 DE OCTUBRE DE 2028 ... ES LA FECHA PARA LA POSIBLE ENTRADA DE GENÉRICOS DE LURBINECTEDIN ...
22 mayo 2007
Synthesis and Structure-Activity Relationship of Cytotoxic Marine Cyclodepsipeptide IB-01212 Analogues. 18 / 5 / 2007 .
2007 May 18
Cruz LJ, Francesch A, Cuevas C, Albericio F.
Institute for Research in Biomedicine, Barcelona Science Park, University of Barcelona, 08028-Barcelona, Spain, Fax: (+34) 93-403-71-26.
Several recently discovered marine products have remarkable in vitro and in vivo anticancer profiles against a wide range of tumor cell lines. Some of these compounds are currently in clinical trials. These compounds show complex structures and mechanisms of action of interest. Herein, we describe the preparation of a series of totally synthetic molecules that are structurally related to the natural marine product IB-01212 and evaluated them as antitumor agents. For this, total solid-phase syntheses of the products were performed in parallel by two distinct routes: linear synthesis and convergent synthesis. Structural modifications were introduced in several residue positions to afford 21 IB-01212 analogues for structure-relationship studies. An increase in the number of methyl groups in the macrocycle enhanced cytotoxic activity. Also, the replacement of an ester bond by an amide bond favored antitumor activity against several human cell lines. In addition, the L configuration analogues were more active against all the tumor cell lines than those containing the D configuration. A significant increase in the size and asymmetry of the macrocycle diminished biological activity with respect to that of IB-01212. These results are of great value for the discovery of new and more effective anticancer agents.
Cruz LJ, Francesch A, Cuevas C, Albericio F.
Institute for Research in Biomedicine, Barcelona Science Park, University of Barcelona, 08028-Barcelona, Spain, Fax: (+34) 93-403-71-26.
Several recently discovered marine products have remarkable in vitro and in vivo anticancer profiles against a wide range of tumor cell lines. Some of these compounds are currently in clinical trials. These compounds show complex structures and mechanisms of action of interest. Herein, we describe the preparation of a series of totally synthetic molecules that are structurally related to the natural marine product IB-01212 and evaluated them as antitumor agents. For this, total solid-phase syntheses of the products were performed in parallel by two distinct routes: linear synthesis and convergent synthesis. Structural modifications were introduced in several residue positions to afford 21 IB-01212 analogues for structure-relationship studies. An increase in the number of methyl groups in the macrocycle enhanced cytotoxic activity. Also, the replacement of an ester bond by an amide bond favored antitumor activity against several human cell lines. In addition, the L configuration analogues were more active against all the tumor cell lines than those containing the D configuration. A significant increase in the size and asymmetry of the macrocycle diminished biological activity with respect to that of IB-01212. These results are of great value for the discovery of new and more effective anticancer agents.
Suscribirse a:
Entradas (Atom)