COMPOSITIONS FOR USE IN THE TREATMENT OF ULCERATIVE COLITIS
申请人:Sigmoid Pharma Limited
公开号:EP3091967A1
公开(公告)日:2016-11-16
[EN] COMPOSITIONS FOR USE IN THE TREATMENT OF ULCERATIVE COLITIS<br/>[FR] COMPOSITIONS DESTINÉES À ÊTRE UTILISÉES DANS LE TRAITEMENT DE LA RECTOCOLITE HÉMORRAGIQUE
申请人:SIGMOID PHARMA LTD
公开号:WO2015104414A1
公开(公告)日:2015-07-16
An oral modified release composition comprising cyclosporin, wherein the composition is for use in the treatment of ulcerative colitis in a patient, wherein the composition is for use in the concurrent treatment of the patient with an active agent selected from an aminosalicylate and a steroid, and a fixed or free combination thereof. Also claimed are kits comprising the oral modified release composition and the active agent. Also disclosed are methods for the treatment of ulcerative colitis using the oral modified release composition.
Synthesis, characterization, crystal structures and in vitro antimicrobial activities of triorganotin(IV) complexes of azo-dicarboxylates
complexes (R = n-butyl, phenyl and methyl) of azo-dicarboxylates were synthesized by reacting bis-tri-n-butyltin(IV) oxide with (E)-5-((2-carboxyphenyl)diazenyl)-2-hydroxy benzoic acid (L1HH′) [compound 1] and tri-organotin(IV) chlorides [R = Ph, Me] with either sodiumsalt of (E)-5-((2-carboxyphenyl)diazenyl)-2-hydroxy benzoic acid (L1Na) [compounds 2 and 3] or sodiumsalt of (E)-5-((4-carboxyphenyl)diazenyl)-2-hydroxy
We report here an extensive structure-activity relationship study of balsalazide, which was previously identified in a high-throughput screening as an inhibitor of Sirt5. To get a closer understanding why this compound is able to inhibit Sirt5, we initially performed docking experiments comparing the binding mode of a succinylated peptide as the natural substrate and balsalazide with Sirt5 in the presence of NAD(+). Based on the evidence gathered here, we designed and synthesized 13 analogues of balsalazide, in which single functional groups were either deleted or slightly altered to investigate which of them are mandatory for high inhibitory activity. Our study confirms that balsalazide with all its given functional groups is an inhibitor of Sirt5 in the low micromolar concentration range and structural modifications presented in this study did not increase potency. While changes on the N-aroyl-beta-alanine side chain eliminated potency, the introduction of a truncated salicylic acid part minimally altered potency. Calculations of the associated reaction paths showed that the inhibition potency is very likely dominated by the stability of the inhibitor-enzyme complex and not the type of inhibition (covalent vs. non-covalent). Further in-vitro characterization in a trypsin coupled assay determined that the tested inhibitors showed no competition towards NAD(+) or the synthetic substrate analogue ZKsA. In addition, investigations for subtype selectivity revealed that balsalazide is a subtype-selective Sirt5 inhibitor, and our initial SAR and docking studies pave the way for further optimization. (C) 2020 Elsevier Masson SAS. All rights reserved.