Synthesis and Characterisation of Substrate-Based Peptides as Inhibitors of Histone Demethylase KDM4C
作者:Simon D. Nielsen、Ulrike Leurs、Magnus Bergner、Silvia A. Barris、Kanchan Devkota、Kamilla Meyer,、Daniella Iaria、Jack McCaughan、Brian Lohse、Jesper L. Kristensen、Rasmus P. Clausen
DOI:10.2174/0929866523666160613210831
日期:2016.8.8
The design and synthesis of modified pentapeptides based on a truncated
version of the substrate for KDM4C, a histone lysine demethylase (KDM), and investigation
of their inhibitory activity at KDM4C is reported. By modifying the
lysine residue corresponding to lysine 9 at histone 3 (H3K9), three different series of
peptides were designed and synthesized. One series contained N-acylated H3K9 and
two series introduced triazoles in this position via click chemistry to enable facile
variation of headgroups. The click reaction is compatible with free amino acids and
this was performed on an azido containing deprotected pentapeptide demonstrating a
highly facile and convergent synthetic strategy for making substrate-based inhibitors.
One of the 14 peptides showed inhibitory activity at KDM4C demonstrating the
need for an iron chelator in the pentapeptide series.
The present invention relates to macrocyclic compounds which are capable of selective binding to a target saccharide (e.g. glucose), making them particularly well suited for use in saccharide sensing applications. The present invention also relates to processes for the preparation of said compounds, to compositions and devices comprising them, and to their use in the detection of a target saccharide.
In Vitro Membrane Permeation Studies and in Vivo Antinociception of Glycosylated Dmt<sup>1</sup>-DALDA Analogues
作者:Steven Ballet、Cecilia Betti、Alexandre Novoa、Csaba Tömböly、Carsten Uhd Nielsen、Hans Christian Helms、Anna Lesniak、Patrycja Kleczkowska、Nga N. Chung、Andrzej W. Lipkowski、Birger Brodin、Dirk Tourwé、Peter W. Schiller
DOI:10.1021/ml4004765
日期:2014.4.10
In this study the mu opioid receptor (MOR) ligands DALDA (Tyr-D-Arg-Phe-Lys-NH2) and Dmt(1)-DALDA (Dmt-D-Arg-Phe-Lys-NH2, Dmt = 2',6'-dimethyltyrosine) were glycosylated at the N- or C-terminus. Subsequently, the modified peptides were subjected to in vitro and in vivo evaluation. In contrast to the N-terminally modified peptide (3), all peptide analogues derivatized at the C-terminus (4-7) proved to possess high affinity and agonist potency at both MOR and DOR (delta opioid receptor). Results of the Caco-2 monolayer permeation, as well as in vitro blood-brain barrier model experiments, showed that, in the case of compound 4, the glycosylation only slightly diminished the lumen-to-blood and blood-to-lumen transport. Altogether, these experiments were indicative of transcellular transport but not active transport. In vivo assays demonstrated that the peptides were capable of (i) crossing the blood-brain barrier (BBB) and (ii) activating both the spinal ascending as well as the descending opioid pathways, as determined by the tail-flick and hot-plate assays, respectively. In contrast to the highly selective MOR agonist Dmt(1)-DALDA 1, compounds 4-7 are mixed MOR/DOR agonists, expected to produce reduced opioid-related side effects.
MACROCYCLIC COMPOUNDS
申请人:Ziylo Limited
公开号:US20200399232A1
公开(公告)日:2020-12-24
The present invention relates to macrocyclic compounds which are capable of selective binding to a target saccharide (e.g. glucose), making them particularly well suited for use in saccharide sensing applications. The present invention also relates to processes for the preparation of said compounds, to compositions and devices comprising them, and to their use in the detection of a target saccharide.
Oxidative α,ω-diyne coupling as an approach towards novel peptidic macrocycles
作者:S. Verlinden、N. Geudens、J. C. Martins、D. Tourwé、S. Ballet、G. Verniest
DOI:10.1039/c5ob01153a
日期:——
The Glaser–Hay diyne coupling proved to be an efficient cyclisation approach towards diyne containing peptidic macrocycles.