EP4048258A1 - Analogues de n-acyl-homoserine lactones et composition pharmaceutique les comprenant - Google Patents
Analogues de n-acyl-homoserine lactones et composition pharmaceutique les comprenantInfo
- Publication number
- EP4048258A1 EP4048258A1 EP20796580.7A EP20796580A EP4048258A1 EP 4048258 A1 EP4048258 A1 EP 4048258A1 EP 20796580 A EP20796580 A EP 20796580A EP 4048258 A1 EP4048258 A1 EP 4048258A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxo
- chem
- formula
- cells
- hsl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
- A61K31/381—Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D333/30—Hetero atoms other than halogen
- C07D333/32—Oxygen atoms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/16—Amides, e.g. hydroxamic acids
- A61K31/165—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide
- A61K31/167—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide having the nitrogen of a carboxamide group directly attached to the aromatic ring, e.g. lidocaine, paracetamol
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/06—Antipsoriatics
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
- C07C235/70—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups and doubly-bound oxygen atoms bound to the same carbon skeleton
- C07C235/72—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups and doubly-bound oxygen atoms bound to the same carbon skeleton with the carbon atoms of the carboxamide groups bound to acyclic carbon atoms
- C07C235/74—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups and doubly-bound oxygen atoms bound to the same carbon skeleton with the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of a saturated carbon skeleton
Definitions
- TITLE ANALOGUES OF N-ACYL-HOMOSERINE LACTONS AND PHARMACEUTICAL COMPOSITION CONTAINING THEM
- the invention relates to analogs of N-acyl-homoserine lactones (AHLs) and pharmaceutical compositions comprising them. It also relates to their use in the treatment of inflammatory diseases of the epithelium. Inflammatory diseases of the epithelium affect both the digestive tract and the skin. Indeed, these organs are in direct contact with the external environment and their microbiome is specific. Inflammatory skin diseases include psoriasis.
- IBD Chronic inflammatory bowel disease
- CD Crohn's disease
- UC ulcerative colitis
- CD can a priori affect all segments of the digestive tract, but more frequently affects the ileum, colon and anus.
- the disease presents with transmural inflammation, i.e. affecting the different layers of the digestive wall, which can cause severe complications in patients, such as strictures and fistulas.
- UC affects the rectum and the terminal part of the colon. The resulting inflammation is usually limited to the intestinal mucosa and submucosa.
- the pathophysiology of IBD is complex and still poorly understood, but obviously involves multiple factors including environmental causes, genetic predisposition, immune disturbances, a defect in barrier function and an imbalance, called dysbiosis, of the intestinal flora: the microbiota.
- the gut microbiota plays an important role in controlling inflammation and regulating barrier function.
- barrier strengthening mechanisms have been described, such as the stimulation of the secretion of antimicrobial peptides or mucus, but little work has analyzed the influence of the commensal microbiota on the permeability of tight junctions, which are the key players in the control of paracellular permeability.
- Quorum sensing is a mode of communication between the individuals of a bacterial colony, based on the secretion into the surrounding environment of small diffusible molecules playing the role of chemical messengers and called auto-inducers (AI). Quorum sensing is based on the density of bacteria present in the medium and on the concentration of signal molecules in their close environment. The quantity of molecules in the medium is a direct reflection of the state of the colony: when the number of individuals is low, the concentration of auto-inducers is also low; but when the cell density increases, the concentration of molecules in turn increases until it crosses a threshold beyond which one or more bacterial phenotypes are modified. This is called a quorum threshold.
- sensing refers to the ability of bacteria to detect molecules in the medium via appropriate receptors, hence the name auto-inducers because the molecules are both secreted and detected.
- Quorum sensing involving N-acyl-homoserine lactones (AHLs) is a mode of inter-bacterial communication described in Gram-negative bacteria in many ecosystems. These molecules are also capable of exerting effects on the host's cells, in a so-called “inter-kingdom” dialogue.
- inter-kingdom the presence of molecules of the AHLs type in the intestinal ecosystem has hitherto remained very little described.
- the intestinal microbiota includes all the microorganisms (bacteria, yeasts, archaea and viruses) present in our digestive tract, including 10 14 bacteria (about 10 times the number of human cells, although this ratio is subject to debate) distributed in a thousand species.
- the relationship between the host and its gut microbiota is symbiotic, as it mutually benefits both parties.
- the host provides nutrients via its food bolus, while the microbiota performs many physiological functions (metabolism of carbohydrates and lipids, transformation of bile acids, etc.), immune (“education” of the immune system), but also ecological, because the occupation of the intestinal space by a commensal flora prevents colonization by pathogenic species.
- microbiota of an adult individual is unique to them, major common characteristics have been identified to describe a healthy microbiota in a state of normobiosis.
- the dominant microbiota or core microbiome is made up of 4 phyla: Firmicutes and Bacteroidetes are strongly represented, and to a lesser extent Actinobacteria and Proteobacteria phyla.
- an imbalance may appear in the representation of the bacterial populations normally present: this is dysbiosis. It has thus been shown that there is a state of dysbiosis in IBD, which certainly constitutes a key element in the establishment of these pathologies, although these mechanisms of establishment have not yet been elucidated.
- This dysbiosis is characterized by a loss of diversity with changes in the microbial composition (decreased Bacteroidetes and Firmicutes with in particular a significant loss of the Clostridia genus, increase in Gammaproteobacteria and the appearance of new groups such as AIEC and Fusobacterium) and in the functions. of the microbiota (metabolism of amino acids and biosynthesis of SCFAs and reduced butyrate, increased oxidative stress, etc.). As described previously, QS is involved in bacterial inter-species communication, but can also intervene in host-microbiota relationships (interkingdom or inter-kingdom in French).
- this molecule can modulate the immune response of the host by acting as a virulence factor in itself and lead to an inflammatory response by induction of immune cells and pro-inflammatory cytokines through the expression of NF- kappaB.
- the entry of AHL into eukaryotic cells was demonstrated in 2007 by Ritchie et al.
- ECollection 2018 are known and described as molecules having an anti-inflammatory effect and an action on tight junctions. These two molecules (3-oxo-C12-HSL produced by a pathogen and 3-oxo-C12: 2-HSL associated with a healthy microbiota) both act on eukaryotic cells in the intestinal ecosystem. However, "natural" AHLs are molecules with poor stability.
- AHLs The degradation of AHLs can lead to two different by-products: on the one hand, hydrolysis of the lactone head produces an open form of AHL exhibiting a new alcohol function and a carboxylic acid (this molecule will be referred to here as 3 -oxo-C12-HS); on the other hand, a rearrangement of the molecule can give a new molecule called tetramic acid.
- the transformation of AHLs into open form can take place by spontaneous hydrolysis in an aqueous medium, or else be catalyzed by enzymes secreted by the intestinal epithelium of mammals, and in particular paraoxonases (PON1, 2 and 3). Besides the question of the stability of AHLs, the recognition of these molecules by bacterial receptors is problematic.
- the invention aims to provide molecules bio-inspired by natural AHLs (analogs of natural AHLs) whose structural modifications are intended: - to increase their stability, - to limit their toxicity, - to allow their direct use as therapeutic molecules, - to modulate their biological activity, - to study their impact on the host, - to exploit their properties for therapeutic purposes.
- the invention provides a compound having the following general formula I: [Chem 3] in which: - X, Y, Z and W are independently of each other a carbon atom or a heteroatom chosen from S, N and O, provided that X is different from O, - X, Y, Z and W are independently of each other optionally substituted by a halogen chosen from Cl, F, Br, and I, or a linear or branched C 1 to C 4 alkyl group, - x, y, z, and w, independently of each other others are 0 or 1, provided that 3 ⁇ x + y + z + w ⁇ 4, - R represents H or a linear or branched C1 to C4 alkyl group, or a hydroxyl group (OH) or an azido group (N3 ), - R 'represents H or a linear or branched C 1 to C 4 alkyl group - - ----- represents a single or double bond (-cis or
- the compound of formula I is chosen from the group formed by: - - (D / L) -3oxoC12 aminothiolactone ((D / L) -3oxoC12 -HTL) of following formula I-1: [Chem 4] (D / L) -3oxoC 12 -HTL Formula I-1 - la (S, S) 3-oxo C12-aminocyclohexanol (S, S) 3-oxo C12-ACH) of formula I-2 following: [Chem 5] - (S) -3 – oxo C12 aminothiolactone ((S) -3oxoC12 –HTL) of the following formula I-3: [Chem 6] - (R, S) -3-oxo C 12 -aminocyclohexanol of the following formula I-4: [Chem 7] -
- the invention also provides a pharmaceutical composition
- a pharmaceutical composition comprising: - at least one compound having the following general formula I: [Chem 10]
- Formula I in which: - X, Y, Z and W are independently of each other a carbon atom or a heteroatom selected from S, N and O, provided that X is other than O, - X, Y , Z and W are independently of each other optionally substituted by a halogen selected from Cl, F, Br, and I, or a linear or branched C 1 to C 4 alkyl group, - x, y, z, and w, independently of each other is 0 or 1, provided that 3 ⁇ x + y + z + w ⁇ 4, - R represents H or a linear or branched C1 to C4 alkyl group, or a hydroxyl group (OH) or an azido group (N 3 ), - R 'represents H or a linear or branched C 1 to C 4 alkyl group
- the at least one compound of formula I is chosen from the group formed by: - - (D / L) -3oxoC 12 aminothiolactone ((D / L) -3-oxo-C 12 -HTL) of the following formula I-1: (D / L) -3oxoC 12 -HTL Formula I-1 - la (S, S) 3-oxo C12 aminocyclohexanol (S, S) 3-oxo C12-ACH) of formula I-2 as follows: [Chem 12 ] , - (S) -3 – oxo C12 aminothiolactone ((S) -3oxoC12 –HTL) of the following formula I-3: [Chem 13] - (R, S) -3-oxo C 12 -aminocyclohexanol of the following formula I-4: [Chem 14] - 3-oxo C12-aminocyclohexanol
- FIG. 1 shows in bar graph the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of (D, L) -3oxo C12 aminothiolactone of formula I-1 used in the invention
- FIG. 2 shows the activation curves of the LasR receptor on a reporter bacterial strain compared to the natural molecules C4-HSL and 3-oxo-C12-HSL and to the molecule of formula I-1 used. in the invention
- FIG. 3 FIG.
- FIG. 3 represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of (S, S) 3- oxo C12 aminocyclohexanol (S, S) 3-oxo C12-ACH) of formula I-2 used in the invention
- FIG. 4 represents the curve of inhibition of the secretion. IL-8 etion by human keratinocytes stimulated by IL-17 and TNF- ⁇ in the presence of increasing doses of (S, S) 3-oxo C12 aminocyclohexanol (S, S) 3-oxo C12-ACH) of formula I-2 used in the invention
- FIG. 5 FIG.
- FIG. 5 represents the curve of inhibition of the secretion of IL-2 by human lymphocytes stimulated by CD2, CD3 and CD28, in the presence of increasing doses of (S, S) 3-oxo C 12 - aminocyclohexanol (S, S) 3-oxo C12-ACH) of formula I-2 used in the invention
- FIG. 6 shows the activation curves of the LasR receptor on a reporter bacterial strain relative to the natural 3-oxo-C 12 HSL molecule and to the molecule of formula I-2 used in the invention
- FIG. 7 FIG.
- FIG. 7 represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1ß in the presence of (S) -3 – oxo C12 aminothiolactone ((S) -3oxoC12 - HTL) of formula I-3 used in the invention
- FIG. 8 represents in the form of a bar graph the results of stimulation of murine cells Raw 264.7 by the combination IFN- ⁇ / LPS in the presence of (S, S) -3 – oxo C12 ami- nocyclohexanol ((S, S) -3 oxo C12-ACH) of formula I-2 used in the invention
- FIG. 9 represents in bar graph form the results of stimulation of Caco- cells.
- FIG. 10 represents in the form of a bar graph the results of stimulation of raw 264.7 murine cells by the IFN- ⁇ / LPS combination in the presence of (R, S) 3-oxo C12- ACH) of formula I-4 used in the invention, [Fig. 11] FIG.
- FIG. 11 shows the curves of activation of the LasR receptor on a reporter bacterial strain compared to the natural molecule 3-oxo-C12-HSL and to the (R, S) 3- oxo C12-aminocy-clohexanol of formula I-4 used in the invention
- FIG. 12 represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in presence of 3-oxo C12-aminochlorophenol of formula I-6 used in the invention
- FIG. 13 FIG.
- FIG. 13 represents in the form of a bar graph the results of stimulation of murine Raw 264.7 cells by the IFN- ⁇ / LPS combination in the presence of 3-oxo C 12 -amino-chlorophenol of formula I-6 used in the invention
- FIG. 14 shows the curves of activation of the LasR receptor on a reporter bacterial strain compared to the natural molecule 3-oxo-C 12 -HSL and to the 3 -oxo C 12 -aminochlorophenol of formula I-6 used in the invention.
- FIG.15 FIG.
- FIG. 15 represents in the form of a “heat map” the secretion of 23 cytokines by murine cells Raw264.7 under stimulated conditions (LPS 10 ng / mL; IFN- ⁇ 20 U / mL) (normalized by compared to control),
- Figure 16 represents in the form of histograms: Top, the amount of TNF ⁇ secreted by Raw264.7.7 murine cells stimulated by LPS and interferon ⁇ in the presence of 3-oxo-C12: 2-HSL Bottom, the amount of TNF ⁇ secreted by Raw264.7 murine cells stimulated by LPS and interferon ⁇ in the presence of PCR, [Fig. 17] FIG.
- FIG. 18 represents in diagram form the results in gene expression obtained by measuring the messenger RNAs by quantitative PCR for 3 cytokines of interest: Rantes, TNF alpha, IL1-beta, [Fig. 18]
- FIG. 18 represents in the form of histograms the cytotoxicity of the treatments with 3oxoC 12 -HSL (A) and 3oxoC 12 : 2-HSL (B) AHL on stimulated Caco-2 / TC7 cells. Mean values of different replicates (n ⁇ 3) ⁇ SEM, [Fig.
- Figure 21 represents in the form of histograms the secretion of LDH under stimulated conditions in the Caco-2 / TC7 cell lines (A) and Raw264.7 (B). Mean values of several replicates (n ⁇ 6) ⁇ SEM, [Fig. 22] Figure 22 represents in the form of histograms the secretion of LDH under stimulated conditions in the cell lines Caco-2 / TC7 (A) and Raw264 .7 (B). Average values of several replicates (n ⁇ 8) ⁇ SEM, [Fig. 23] Figure 23 represents in the form of histograms the comparative survival of the E.
- the invention is based on the discovery of bio-inspired synthetic analogues of N-acyl-homoserine lactones (AHLs) having anti-inflammatory activity and an action on tight junctions at least equal to those of natural AHLs produced in the invention.
- AHLs N-acyl-homoserine lactones
- intestine while having better stability, delayed bacterial recognition and lower toxicity.
- Natural AHLs, produced in the intestine, including the compounds used in the invention are analogs, are 3-oxo-C12-HSL and -oxo-C12: 2-HSL.
- the inventors have these natural AHLs segmented into three areas of interest: - homoserine lactone Head - Substitution oxo to form a ketone in the 3 rd carbon of the carbon chain - acyl chain from 10 to 16 carbons.
- the L-enantiomer of AHL is the active form (no activity of the D-enantiomer).
- the inventors then studied the influence of a modification with various chemical groups of each of these three areas of interest on the biological activity on human and murine cells, on the stability and bacterial recognition of the analogues thus obtained.
- the length of the carbon chain can be from 10 and up to 16 carbon atoms, with an optimal length of 14 carbon atoms, and only tolerates the addition of chemical groups of small steric hindrance.
- the presence of the lactone group in position C3 is necessary, since its removal or its transformation into acetal inhibits the anti-inflammatory activity of AHLs.
- the head group can only tolerate minor modifications which do not excessively increase its size and which retain chemical groups capable of forming hydrogen bonds.
- the compounds used in the invention for the treatment of inflammatory diseases of the epithelium, and in particular inflammatory diseases of the intestine and psoriasis have the following general formula I: [Chem 17] Formula I in which: - X, Y, Z and W are independently of each other a carbon atom or a heteroatom selected from S, N and O, provided that X is other than O, - X, Y, Z and W are independently of each other optionally substituted by a halogen selected from Cl, F, Br, and I, or a linear or branched C 1 to C 4 alkyl group, - x, y, z, and w, independently each other is 0 or 1, provided that 3 ⁇ x + y + z + w ⁇ 4, - R represents H or a linear or branched C 1 to C 4 alkyl group, or a hydroxyl group (OH) or an azido group (N3), - R 'represents H or a linear formula I
- the pharmaceutical composition can be formulated for any form of administration, in a solid or liquid or semi-solid form, such as for example in the form of gel, cream, balm and can be administered orally, rectally, intravenously, or topical.
- This pharmaceutical composition is in particular intended for the treatment of an inflammatory disease of the epithelium, and in particular of an inflammatory bowel disease and psoriasis.
- Preferred compounds for use in the treatment of inflammatory disease of the epithelium are the following compounds.
- the first of these compounds is (D / L) -3oxoC12 aminothiolactone ((D / L) -3oxoC 12 - HTL) of the following formula I-1: [Chem 18]
- the compound of formula I-1 corresponds to natural 3-oxo-C12 HSL in which the lactone head has been replaced by a thiolactone group.
- FIG. 1 shows in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of (D / L) -3oxo C12 aminothiolactone of formula I-1 used in the invention, in comparison with DMSO, this compound exhibits in the human enterocytes (cells of the intestinal epithelium) line Caco-2 / TC7 an activity equivalent to that of 3-oxo- C12 natural HSL, and is more active than this at the 100 ⁇ M dose.
- FIG. 2 shows the activation curves of the LasR receptor on a reporter bacterial strain relative to the natural molecules C 4 -HSL and 3-oxo-C 12 -HSL and to the molecule of formula I-1 used in the invention.
- the racemic of formula I-1 exhibits a delayed recognition capacity with an EC50 of 125 nM vs. 9 nM for the natural molecule 3-oxo-C 12 -HSL and vs. an absence of recognition (EC 50 > 1000 ⁇ M) for the natural molecule C4-HSL.
- the second of these compounds is (S, S) 3-oxo C12 aminocyclohexanol ((S, S) 3 oxo C12- ACH) of formula I-2 below: [Chem 19]
- the compound of formula I-2 corresponds to 3-oxo-C12 HSL in which the lactone head has been replaced by an (S, S) -aminocyclohexanol group.
- this compound has a relative EC 50 of 111nM and a maximum inhibition corresponding to 39% of the inhibition obtained in the presence of the reference compound betamethasone, which makes it possible to show the generalization of the anti-inflammatory effects of this molecule to several cell lines, derived from different organs of the human body.
- Figure 8 shows in bar graph form the results of stimulation of Raw 264.7 murine cells by the IFN- ⁇ / LPS combination in the presence of (S, S) -3 – oxo C12 aminothiolactone ((S, S) -3 oxo C12-ACH) of formula I-2.
- This figure shows that the compound of formula I-2 is more active than the reference molecule 3-oxo-C12-HSL, and this at all doses in the range of concentrations from 1 to 50 ⁇ M.
- the third compound is (S) -3 – oxo C12aminothiolactone ((S) -3oxoC12 – HTL) of the following formula I-3: [Chem 20]
- the compound of formula I-3 corresponds to 3-oxo-C 12 HSL in which the lactone head has been replaced by a thiolactone group.
- FIG. 7 which represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of (S) -3 – oxo C 12 aminothiolactone ( (S) -3oxoC 12 –HTL) of formula I-3, we find during this stimulation effects observed with the molecule of formula I-3 used in the invention similar to those observed with the natural molecule 3-oxo-C12 -HSL, including a 27% decrease in inflammatory secretion at 5 ⁇ M.
- the fourth compound is (R, S) -3-oxo C12-aminocyclohexanol of the following formula I-4: [Chem 21] FIG.
- FIG. 9 represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of (R, S) 3-oxo C12 aminocyclohexanol ((R, S) 3 - oxo C 12 -ACH) of formula I-4 used in the invention. From FIG. 9, an activity equivalent to that of natural 3-oxo-C12 HSL in the range 1-50 ⁇ M can be seen in the Caco-2 / TC7 human enterocyte line.
- FIG. 10 represents in the form of a bar graph the results of stimulation of murine cells Raw 264.7 by the IFN- ⁇ / LPS combination in the presence of (R, S) 3-oxo C 12 -ACH of formula I-4 used in the invention. It can be seen from FIG.
- FIG. 11 shows the activation curves of the LasR receptor on a reporter bacterial strain compared to the natural molecule 3-oxo-C 12 -HSL and to the (R, S) 3-oxo C 12 -aminocy- clohexanol of formula I -4 used in the invention.
- the (R, S) -3-oxo C12-aminocyclohexanol of formula I-4 exhibits an EC50 of 200 ⁇ M. It therefore has a very markedly delayed recognition capacity compared to natural AHLs.
- the fifth compound is 3-oxo C 12 -aminocyclohexanol of the following formula I-5: [Chem 22]
- the compound of formula I-5 corresponds to 3-oxo-C12 HSL in which the lactone head has been replaced by an aminocyclohexanol group.
- the sixth compound is 3-oxo C12-aminochlorophenol of the following formula I-6: [Chem 23]
- the compound of formula I-6 corresponds to 3-oxo-C12 HSL in which the lactone head has has been replaced by an aminochlorophenol group.
- FIG. 12 represents in bar graph form the results of stimulation of Caco-2 / TC7 cells by IL-1 ⁇ in the presence of 3-oxo C 12 -aminochlorophenol of formula I-6 used in the invention. . It can be seen from FIG. 12 that in the Caco-2 / TC7 human enterocyte line, the molecule exhibits significantly greater activity than that of natural 3-oxo-C 12 HSL in the 10-100 ⁇ M range.
- FIG. 13 represents in bar graph form the results of stimulation of raw 264.7 murine cells by the IFN- ⁇ / LPS combination in the presence of 3-oxo C12-amino-chlorophenol of formula I-6 used in the combination. invention.
- the molecule of formula I-6 exhibits in the murine macrophage line Raw 264.7 an activity significantly greater than that of natural 3-oxo-C12 HSL in the 10-50 ⁇ M range.
- FIG. 14 shows the activation curves of the LasR receptor on a reporter bacterial strain compared to the natural molecule 3-oxo-C12-HSL and to the 3-oxo C12-aminochlorophenol of formula I-6 used in the invention.
- the molecule of formula I-6 exhibits an EC 50 greater than 1000 ⁇ M. It has the most delayed recognition capacity compared to natural AHLs and to the molecules of formula I-1 to I-5 used in the invention. EXAMPLES 1.
- the antibiotics penicillin-streptomycin, non-essential amino acids (NEAA) and L-glutamine were from Invitrogen (Thermo Fisher Scientific, Waltham, USA).
- Dulbecco's Phosphate Buffered Saline (10X DPBS), High Glucose Cell Culture Medium (DMEM GlutaMAX 4.5g / L Glucose), DMEM, and DMEM without Red-Phenol were sourced from Gibco (Thermo Fisher Scientific, Waltham, Massachusetts, USA).
- the fetal calf serum was obtained from GE Healthcare (Life Sciences, South Logan, Utah, USA).
- the 3oxoC 12 -HSL molecule was synthesized on request by the company Diverchim (Roissy-en-France, France • All the absorbance and luminescence tests were read on the SpectraMax M5 spectrometers of the Molecular Devices® brand.
- the Caco-2 / TC7 cell line • The Caco-2 cell line originates from a human colon adenocarcinoma and represents a cell culture model of enterocytes lining the epithelium of the small intestine.
- the Caco-2 / TC7 cell line is a clonal population of Caco-2 cells which to a large extent and homogeneously mimics most of the morphological and functional characteristics of normal human enterocytes.
- Caco-2 / TC7 cells exhibit a contact inhibition property leading to growth arrest when cells reach confluence, which allows the establishment of a cell monolayer.
- the cells During the exponential growth phase (from seeding to confluence), the cells remain undifferentiated. At the confluence, they can spontaneously (in the absence of differentiation inducers) differentiate and gradually polarize.
- the differentiation process which is a mechanism related to growth, is maximal at the end of confluence (stationary phase of the growth curve).
- the medium has been changed every day. Under these conditions, the cells showed confluence on day 6. On day 17, the cells were deprived of serum, and were used on day 18. 1.1.2.
- the Raw 264.7 Cell Line consists of macrophage-type murine cells derived from the cell line transformed by the Abelson leukemia virus and originating from BALB / c mice. This cell line is very often used as a model of macrophages in vitro.
- Raw 264.7 cells are capable of phagocytosis and pinocytosis, can kill target cells by antibody-dependent cytotoxicity, and secrete a wide range of inflammatory cytokines as well as nitric oxide (NO).
- Raw 264.7 cells are a very practical cell line: cells grow quickly, appreciate small diameter wells and should be used before a match. These conditions make it an advantageous line for screening compounds.
- the cells were used between passages 13 and 26.
- the Raw 264.7 cells used come from the ATCC bank. They were grown in DMEM supplemented with 10% heat-inactivated fetal calf serum and 1% 200 mM L-glutamine, and maintained at 37 ° C with an atmosphere of 5% CO 2 / air. The medium was changed every two days. 1.1.3.
- the bacterial reporter strain E E.
- coli pSB1075 • A reporter bacterial strain from Quorum Sensing was used to study the ability of molecules to be recognized by the Pseudomonas aeruginosa AHL receptor (LasR) and to induce activation. Thus, the strain pSB1075 of Escherichia coli was used. • The enterobacterium Escherichia coli does not naturally produce AHL, nor does it have an orphan receptor capable of recognizing AHL. This bioluminescent strain was modified by the addition of a plasmid pSB1075.
- This plasmid contains genes encoding both tetracycline resistance and expression of the AHL LasR receptor of the bacterium Pseudomonas aeruginosa, as well as a fusion gene derived from the LasR promoter and the luxCDABE gene from Photorhabdus luminescens.
- the bacterial strain was cultured in LB medium supplemented with 5 ⁇ g / ml of tetracycline to exert selection pressure and to ensure that only the desired strain is amplified.
- the fusion gene included in the plasmid gives the bacteria the ability to emit bioluminescence when the LasR receptor is activated, and provides the user with a robust assay for molecular screening.
- aeruginosa LasR receptor is well suited for the recognition of long chain AHLs, especially its natural partner, 3oxoC 12- HSL, which elicits the highest bioluminescent response.
- short chain AHLs such as C 4 -HSL do not induce the emission of bioluminescence.
- Caco-2 / TC7 cells were seeded in 6-well plates at 100,000 cells / well and grown for 18 days. On day 17, the cells were serum-deprived - meaning that the cell medium was replaced with medium without fetal calf serum - and used on day 18. • The stimulation medium consisted of a so-called “medium”. starvation ”ie without fetal calf serum (DMEM GlutaMAX, 1% NEAA, 1% penicillin-streptomycin) with 100 ⁇ M 2-HQ.
- the cells were incubated for 18 h at 37 ° C with 2 ml of stimulation medium containing 0.1% DMSO (negative control) or stimulation medium containing the test compounds at the desired concentrations, with or without pro-inflam cytokines. - materials to induce inflammation. To induce inflammation, either IL-1 ⁇ at 25 ng / ml or the combination of TNF- ⁇ and IFN- ⁇ at 50 ng / ml each were used. After 18 h, the supernatants were collected and stored at -80 ° C before analysis by ELISA test. The cells were washed with 1 ml of 1X PBS / well, and lysed in 100 ⁇ l of 1X PBS containing 1% Triton X-100.
- Raw 264.7 cells were harvested by scraping and stored at -80 ° C before protein quantification. The LDH assay was performed immediately before freezing. • All cell experiments were performed in triplicates. 1.2.2. Stimulation of Raw 264.7 with LPS and IFN- ⁇ • Raw 264.7 cells were seeded in 12-well plates at 75,000 cells / well, or 24-well plates at 40,000 cells / well, so as to reach 80 to 90% confluence after 3 days of culture. For stimulation, the cells were incubated for 6 h at 37 ° C with 750 ⁇ L (respectively 500 ⁇ L) of cell medium enriched in 2-HQ 100 ⁇ M, containing 0.1% DMSO (negative control) or test compounds.
- cytokine levels were first normalized to the protein content determined in the corresponding cell lysates. Then, to compare the experiments, they could be further normalized using the activated control condition (DMSO + cytokines) as a 100% response. 1.2.5. Quantification of Murine Cytokines • Levels of murine IL-6 cytokines produced by cells were determined in cell supernatants or lysates using the "BD OptEIA Mouse IL-6 ELISA Set" commercially available from BD Biosciences ( San Jose, California, USA, ref. 555240). All ELISA kits were used according to the manufacturer's instructions. • Cytokine levels were first normalized to the protein content determined in the corresponding cell lysates.
- Cytotoxicity test • The cytotoxicity of test compounds and controls, with or without pro-inflammatory cytokines, was assessed using a lactate dehydrogenase (LDH) release test, which follows the release of this enzyme in the supernatants. of cells, a good indicator of membrane damage and cell death. A compound was considered cytotoxic when its level of secreted LDH was greater than 10%. • Two methods can be used to perform the test: measurement with a pyruvate / NADH solution (Sigma), or using the Cytotoxicity PLUS (LDH) detection kit from Roche (Sigma-Aldrich).
- LDH lactate dehydrogenase
- the percentage of cytotoxicity could be established with the formula: [Math 1] 1.3.
- Biological activity of molecules on the bacterial reporter strain E. coli pSB1075 • Escherichia coli does not naturally produce AHL.
- This bioluminescent strain was developed by the addition of a plasmid pSB1075 containing genes encoding tetracycline resistance and expression of the AHL LasR receptor, as well as a fusion gene of the LasR promoter and the gene luxCDABE from Photorhabdus luminescens.
- Luminescence was then read at all wavelengths (integration time 200 ms) on a microplate reader.
- the culture protocol was similar but the bacteria were previously subjected to a pre-incubation with 1, 10 or 100 nM of 3oxoC 12 -HSL for different durations (1, 2, 6 or 16 h) before dilution to obtain P2. After which the incubation was continued according to the standard protocol, with the test compound at the desired concentrations. 1.4.
- Statistical Analysis • All data are represented as the mean plus or minus SEM of n independent experiments, and have been tested for the Gaussian distribution.
- Anti-inflammatory effect of the compounds of the invention In order to evaluate the properties of compounds of interest, a line of murine macrophages, the RAW264.7 was used. In order to assess the effect on inflammation, the cells were treated or not by adding a pro-inflammatory cocktail (interferon- ⁇ (IFN- ⁇ , 20U / mL) and lipopolysaccharides (LPS, 10ng / mL)). The inflammatory state was evaluated by Multiplex analysis by assaying the secretion of 23 cytokines in the supernatant of the cells.
- IFN- ⁇ interferon- ⁇
- LPS lipopolysaccharides
- cytokines The results as a heatmap are shown in Figure 15, which shows the secretion of cytokines by RAW264.7 under stimulated conditions (LPS 10 ng / mL; IFN- ⁇ 20 U / mL) (normalized to control). These results make it possible to visualize overall a decrease in the production of cytokines in the presence of PCR at 50 ⁇ M.
- the cytokines whose production has been modulated by the compounds of the invention are interleukin-1 ⁇ (IL-1 ⁇ ), IL-2, IL-6, IL-12, RANTES, TNF ⁇ , pro-inflammatory cytokines. The decrease in these proteins was dose dependent, and the greatest effects were observed in the presence of PCR at 50 ⁇ M.
- FIG. 16 2 histograms (the first with 3oxoC12: 2; the 2 nd with PCR) showing the results observed for TNF alpha (results from the Multiplex analysis) are shown in figure 16 (top : TNF ⁇ secreted by RAW264.7 stimulated by LPS and interferon ⁇ in the presence of 3oC12: 2 and below: TNF ⁇ secreted by RAW264.7 stimulated by LPS and interferon ⁇ ⁇ in the presence of PCR).
- the confirmation of certain results in gene expression was carried out by measuring the messenger RNAs by quantitative PCR, in particular for 3 cytokines of interest: Rantes, TNF aplha, IL1-beta. The results appear in the diagrams shown in FIG. 17.
- FIG. 19 shows that in the murine cell line Raw264.7, an increase in secreted LDH was observed from 50 ⁇ M for the two AHLs, with a cytotoxicity greater than 10% at the 100 ⁇ M concentration. This phenomenon is observed in basal and stimulated condition, and is therefore attributable to the toxicity of the molecules. This justifies the use of the 1-50 ⁇ M doses in the remainder of the study on the macrophage line. b.
- Natural AHL 3oxoC12-HSL and 3oxoC12 2-HSL
- the AHL 3oxoC12-HSL and 3oxoC12: 2-HSL were tested for bactericidal effects in the range 1- 100 ⁇ M. No toxic effects were observed after 18h of incubation: Absorbances recorded were identical to those recorded for LYBHI medium alone and in the presence of 0.1% DMOS: see figure 23. 4.5 Results on bacterial strain a.
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| Application Number | Priority Date | Filing Date | Title |
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| FR1911861A FR3102357B1 (fr) | 2019-10-23 | 2019-10-23 | Analogues de n-acyl-homoserine lactones et composition pharmaceutique les comprenant |
| PCT/EP2020/079913 WO2021078952A1 (fr) | 2019-10-23 | 2020-10-23 | Analogues de n-acyl-homoserine lactones et composition pharmaceutique les comprenant |
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| EP4048258A1 true EP4048258A1 (fr) | 2022-08-31 |
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| US (1) | US20220411397A1 (fr) |
| EP (1) | EP4048258A1 (fr) |
| JP (1) | JP2023504768A (fr) |
| CN (1) | CN115209891A (fr) |
| AU (1) | AU2020370741A1 (fr) |
| CA (1) | CA3155199A1 (fr) |
| FR (1) | FR3102357B1 (fr) |
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| ES2139079T3 (es) * | 1993-07-02 | 2000-02-01 | Univ Nottingham | Compuestos inmunosupresores y antialergicos, tales como n-(3-oxohexanoil)-homoserina-lactona. |
| US6395282B1 (en) * | 1998-04-16 | 2002-05-28 | University Of Rochester | Immunogenic conjugates of Gram-negative bacterial autoinducer molecules |
| GB0007588D0 (en) * | 2000-03-30 | 2000-05-17 | Univ Nottingham | N-Acyl homoserine lactones |
| US7498292B2 (en) * | 2002-08-15 | 2009-03-03 | The Research Foundation Of State University Of New York | Combinatorial libraries of autoinducer analogs, autoinducer agonists and antagonists, and methods of use thereof |
-
2019
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| FR3102357B1 (fr) | 2022-06-24 |
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| WO2021078952A1 (fr) | 2021-04-29 |
| JP2023504768A (ja) | 2023-02-07 |
| CA3155199A1 (fr) | 2021-04-29 |
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| AU2020370741A1 (en) | 2022-06-02 |
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