text: Design, synthesis and structure-activity relationship of new arginine vasopressin analogues containing proline derivatives in position 2.
  In this study, we present the synthesis and pharmacological properties of new analogues of arginine vasopressin modified in the N-terminal part of the molecule with proline derivatives: indoline-2-carboxylic acid (Ica) and (2S,4R)-4-(naphthalene-2-ylmethyl)pyrrolidine-2-carboxylic acid. All the peptides were tested for pressor, antidiuretic and in vitro uterotonic activities. We also determined their binding affinity to the human oxytocin receptor. The Ica(2) substitution resulted in two moderately potent and selective antioxytocic agents: [Mpa(1), Ica(2), D-Arg(8)]VP and [Mpa(1),Ica(2),Val(4),D-Arg(8)]VP (pA(2) = 7.09 and 7.50, respectively). On the other hand, peptides modified with (2S,4R)-4-(naphthalene-2-ylmethyl)pyrrolidine-2-carboxylic acid, apart from their moderate antioxytocic activity, turned out to be weak antagonists of the pressor response to arginine vasopressin. The results of this study provide useful information about the structure-activity relationship of arginine vasopressin analogues and can help to design compounds with desired biological properties.
entities.id: T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T1 T20 T2 T3 T4 T5 T6 T7 T8 T9
entities.type: CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL GENE-Y GENE-Y GENE-Y GENE-Y CHEMICAL GENE-Y CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL
entities.text: (2S,4R)-4-(naphthalene-2-ylmethyl)pyrrolidine-2-carboxylic acid arginine vasopressin arginine vasopressin arginine vasopressin proline arginine vasopressin human oxytocin receptor arginine vasopressin arginine vasopressin arginine vasopressin N arginine vasopressin proline indoline-2-carboxylic acid Ica (2S,4R)-4-(naphthalene-2-ylmethyl)pyrrolidine-2-carboxylic acid oxytocin Ica [Mpa(1), Ica(2), D-Arg(8)]VP [Mpa(1),Ica(2),Val(4),D-Arg(8)]VP