Synthetic Analogues of the Bacterial Signal (Quorum Sensing) Molecule N-(3-Oxododecanoyl)-l-homoserine Lactone as Immune Modulators
摘要:
Comparative immune modulatory activity for a range of synthetic analogues of a Pseudomonas aeruginosa signal molecule, N-(3-oxododecanoyl)-L-homoserine lactone (3O, C-12-HSL), is described. Twenty-four single or combination systematic alterations of the structural components of 3O, C12-HSL were introduced as described. Given the already defined immunological profile of the parent compound, 3O, C12-HSL, these compounds were assayed for their ability to inhibit murine and human leucocyte proliferation and TNF-alpha secretion by lipopolysaccharide (LPS) stimulated human leucocytes in order to provide an initial structure-activity profile. From IC50 values obtained with a murine splenocyte proliferation assay, it is apparent that acylated L-homoserine lactones with an 11-13 C side chain containing either a 3-oxo or a 3-hydroxy group are optimal structures for immune suppressive activity. These derivatives of 3O, C-12-HSL with monounsaturation and/or a terminal nonpolar substituent on the side chain were also potent immune suppressive agents. However, structures lacking the homoserine lactone ring, structures lacking the L-configuration at the chiral center, and those with polar substituents were essentially devoid of activity. The ability of compounds selected from the optimal activity range to modulate mitogen-driven human peripheral blood mononuclear cell proliferation and LPS-induced TNF-alpha secretion indicates the suitability of these compounds for further investigation in relation to their molecular mechanisms of action in TNF-alpha driven immunological diseases, particularly autoimmune diseases such as psoriasis, rheumatoid arthritis, and type 1 (autoimmune) diabetes.
Enamine-Based Domino Strategy for C-Acylation/Deacetylation of Acetoacetamides: A Practical Synthesis of β-Keto Amides
作者:Plamen Angelov
DOI:10.1055/s-0029-1219836
日期:2010.5
A practical three-step route for C-acylation/deacetylation of acetoacetamides is described. Initial enamination of the acetoacetamides with Boc-monoprotected ethylenediamine provides β-enamino amides, which are acylated at the α-carbon with excellent selectivity. The C-acylated derivatives undergo domino fragmentation in acidic media to give the corresponding α-Keto amides accompanied by 2-methyl-4
INHIBITORS OF BIOFILM FORMATION OF GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIA
申请人:Ammendola Aldo
公开号:US20090192192A1
公开(公告)日:2009-07-30
The present invention relates to the use of compounds as broad spectrum inhibitors of bacterial biofilm formation. In particular the invention refers to a family of compounds that block the quorum sensing system of Gram-negative and Gram-positive bacteria, a process for their manufacture, pharmaceutical compositions containing them and to their use for the treatment and prevention of bacterial damages and diseases, in particular for diseases where there is an advantage in inhibiting quorum sensing regulated phenotypes of pathogens.
Quorum sensing based polymer for stimulation of biofilms and related phenotypes, and synthesis process thereof
申请人:FIB-SOL Life Technologies Private Limited
公开号:US10988571B2
公开(公告)日:2021-04-27
The invention relates to the synthesis and process thereof of a Quorum Sensing (QS) based polymer formed by the process of ring opening polymerization/ring opening copolymerization. The formed homopolymer or heteropolymer or copolymer displays increased half-life, bioactivity and biostability in stimulating the microbial quorum sensing in a predetermined microbial population.
QUORUM SENSING BASED POLYMER FOR STIMULATION OF BIOFILMS AND RELATED PHENOTYPES, AND SYNTHESIS PROCESS THEREOF
申请人:FIB-SOL Life Technologies Private Limited
公开号:US20200031989A1
公开(公告)日:2020-01-30
The invention relates to the synthesis and process thereof of a Quorum Sensing (QS) based polymer formed by the process of ring opening polymerization/ring opening copolymerization. The formed homopolymer or heteropolymer or copolymer displays increased half-life, bioactivity and biostability in stimulating the microbial quorum sensing in a predetermined microbial population.
ANALOGUES OF N-ACYL-HOMOSERINE LACTONES AND PHARMACEUTICAL COMPOSITION COMPRISING SAME
申请人:SORBONNE UNIVERSITE
公开号:US20220411397A1
公开(公告)日:2022-12-29
The present invention relates to analogues of N-acyl homoserine lactones (AHLs) and pharmaceutical compositions comprising same. The invention also relates to their use in the treatment of inflammatory diseases of the epithelium.