EP2046980A2 - Modulateurs de la lanostérol synthétase dans le traitement de l'acné ou de l'hyperséborrhée - Google Patents
Modulateurs de la lanostérol synthétase dans le traitement de l'acné ou de l'hyperséborrhéeInfo
- Publication number
- EP2046980A2 EP2046980A2 EP07823597A EP07823597A EP2046980A2 EP 2046980 A2 EP2046980 A2 EP 2046980A2 EP 07823597 A EP07823597 A EP 07823597A EP 07823597 A EP07823597 A EP 07823597A EP 2046980 A2 EP2046980 A2 EP 2046980A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- expression
- gene
- activity
- lanosterol
- synthetase
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/573—Immunoassay; Biospecific binding assay; Materials therefor for enzymes or isoenzymes
-
- 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
- A61P17/08—Antiseborrheics
-
- 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
- A61P17/10—Anti-acne agents
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/25—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving enzymes not classifiable in groups C12Q1/26 - C12Q1/66
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6893—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids related to diseases not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/90—Enzymes; Proenzymes
- G01N2333/99—Isomerases (5.)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/20—Dermatological disorders
Definitions
- the invention relates to the identification and use of lanosterol synthetase (LSS) modulator compounds for the treatment of acne, as well as skin disorders associated with hyperseborrhoea. It also relates to methods of in vitro diagnosis or prognosis in vitro of these pathologies.
- LSS lanosterol synthetase
- Hyperseborrhoeic oily skin is characterized by excessive secretion and excretion of sebum.
- a level of sebum greater than 200 ⁇ g / cm 2 measured at the forehead is considered to be characteristic of oily skin.
- Oily skin is often associated with a lack of desquamation, a glowing complexion, a thick skin texture.
- the excess of sebum can serve as a support for the anarchic development of the saprophytic bacterial flora (P. acnes in particular), and cause the appearance of comedones and / or acne lesions. This stimulation of sebaceous gland production is induced by androgens.
- Acne is, in fact, a chronic disease of the pilosebaceous follicle under hormonal dependence.
- a hormonal therapy against acne is a possibility of treatment for women, the goal being to oppose the effects of androgens on the sebaceous gland.
- estrogens, anti-androgens, or agents that decrease the production of androgens by the ovaries or the adrenal gland are generally used.
- Antiandrogens used for the treatment of acne include spironolactone, cyproterone acetate, and flutamide. However, these agents have potentially severe side effects. Thus, any pregnancy must be absolutely prevented, particularly because of a risk of feminization for the male fetus. These agents are prohibited in male patients.
- LSS lanosterol synthetase
- acne we mean all forms of acne, namely in particular vulgar acne, comedonal, polymorphic, nodulocystic acne, conglobata, or secondary acne such as solar acne, drug or professional.
- the Applicant also proposes in vitro diagnostic methods or in vitro prognosis, based on the detection of the level of expression or activity of the LSS.
- LSS lanosterol synthetase, also called 2,3-epoxysqualen-lanosterol cyclase, 2,3-oxidosqualen-lanosterol cyclase, OSC, or Oxidosqualene-lanosterol cyclase.
- Lanosterol synthetase catalyzes the cyclization of (S) -2,3 oxidosqualene to lanosterol during the reaction that forms the sterol nucleus.
- the gene encoding lanosterol synthetase is called OSC gene, or, in the context of the present application, LSS gene.
- the LSS gene is considered an interesting target for the treatment of hypercholesterolemia (Huff and Telford, 2005, Trends Pharmacol Sci., 2005 Jul; 26 (7): 335-40) but also for the treatment of Chagas' disease ( Hankins, Gillesprie, Aikenhead and Buckner, 2005, Mol Biochm Parasitol, 2005 Nov, 144 (1): 68-75).
- LSS gene or "LSS nucleic acid” means the gene or nucleic acid sequence that encodes lanosterol synthetase. If the targeted target is preferably the human gene or its expression product, the invention may also use cells expressing a heterologous lanosterol synthetase, by genomic integration or transient expression of an exogenous nucleic acid encoding the enzyme. .
- a human LSS cDNA sequence is reproduced in the appendix (SEQ ID No. 1). It is the NM 002340 sequence whose coding portion is from nucleic acid 33 to 2231.
- An object of the invention relates to an in vitro method for diagnosing or monitoring the progression of acne lesions or skin disorder associated with hyperseborrhea in a subject, comprising comparing the expression or activity of the lanosterol synthetase protein (LSS), the expression of its gene or the activity of at least one of its promoters, in a biological sample of a subject relative to a biological sample of a control subject.
- LSS lanosterol synthetase protein
- the expression of the protein can be determined by an assay of the LSS protein by radioimmunoassay, for example by ELISA assay. Another method, in particular for measuring the expression of the LSS gene, is to measure the amount of corresponding mRNA by any method as described above. An assay of the activity of LSS can also be envisaged.
- control is a "healthy” subject.
- control subject refers to the same subject at a different time, which preferably corresponds to the beginning of the treatment (To ).
- This measurement of the difference in expression or activity of the LSS, or of expression of its gene or activity of at least one of its promoters makes it possible in particular to monitor the efficacy of a treatment, in particular a treatment with a LSS modulator, as envisaged above, or another treatment against acne or a skin disorder associated with hyperseborrhoea.
- follow-up can reassure the patient as to the appropriateness, or necessity, of continuing this treatment.
- Another aspect of the present invention relates to an in vitro method for determining susceptibility of a subject to develop acne lesions or skin disorder associated with hyperseborrhoea, comprising comparing the expression or activity of the subject.
- lanosterol synthetase protein LSS
- the expression of its gene or the activity of at least one of its promoters in a biological sample of a subject relative to a biological sample of a control subject.
- the expression of the LSS protein can be determined by an assay of this protein by radioimmunoassay, for example by ELISA assay.
- Another method, especially for measuring the expression of the LSS gene is to measure the amount of mRNA corresponding by any method as described above.
- An assay of the activity of LSS can also be envisaged.
- the subject tested here is an asymptomatic subject, having no skin disorder associated with hyperseborrhoea or acne.
- the subject "control” in this method means a "healthy" reference subject or population.
- the detection of this susceptibility allows the establishment of a preventive treatment and / or increased monitoring of signs related to acne or a skin disorder associated with hyperseborrhoea.
- the biological sample tested may be any sample of biological fluid or a sample of a biopsy.
- the sample may be a preparation of skin cells, obtained for example by desquamation or biopsy. It can also be sebum.
- An object of the invention is an in vitro method for screening candidate compounds for the preventive and / or curative treatment of acne, or any skin disorder associated with hyperseborrhoea, comprising determining the capacity of a compound to modulate the expression or activity of lanosterol synthetase or the expression of its gene or the activity of at least one of its promoters, said modulation indicating the utility of the compound for the preventive or curative treatment of lanosterol synthetase acne, or any skin disorder associated with hyperseborrhoea.
- the method therefore makes it possible to select the compounds capable of modulating the expression or the activity of the LSS, or the expression of its gene, or the activity of at least one of its promoters.
- the subject of the invention is an in vitro method for screening candidate compounds for the preventive and / or curative treatment of acne, or skin disorders associated with hyperseborrhoea, comprising the following steps: a. preparation of at least two biological samples or reaction mixtures; b. contacting one of the samples or reaction mixtures with one or more of the test compounds; vs. measuring the expression or the activity of the lanosterol synthetase protein, the expression of its gene or the activity of at least one of its promoters, in the biological samples or reaction mixtures; d.
- Modulation means any effect on the expression or the activity of the enzyme, the expression of the gene or the activity of at least one of its promoters, that is to say, a stimulation, but preferably a inhibition, partial or complete.
- the compounds tested in step d) above preferably inhibit the expression or the activity of the lanosterol synthetase protein, the expression of its gene or the activity of at least one of its promoters.
- the difference in expression obtained with the test compound compared to a control carried out in the absence of the compound is significant from 25% or more.
- expression of a protein means the amount of that protein
- protein activity is meant its biological activity
- promoter activity is meant the ability of this promoter to trigger the transcription of the coded DNA sequence downstream of this promoter (and thus indirectly the synthesis of the corresponding protein).
- the compounds tested can be of any type. They can be of natural origin or have been produced by chemical synthesis. It can be a library of structurally defined chemical compounds, compounds or uncharacterized substances, or a mixture of compounds. Various techniques can be implemented to test these compounds and identify compounds of therapeutic interest, modulators of the expression or activity of lanosterol synthetase.
- the biological samples are cells transfected with a reporter gene operably linked to all or part of the promoter of the gene encoding lanosterol synthetase, and step c) described above consists in measuring the expression of said reporter gene.
- the reporter gene may in particular code for an enzyme which, in the presence of a given substrate, leads to the formation of colored products, such as CAT (chloramphenicol acetyltransferase), GAL (beta galactosidase), or GUS (beta glucuronidase). It may also be the gene for luciferase or GFP (Green Fluorescent Protein).
- the assay of the protein encoded by the reporter gene, or its activity is carried out conventionally, by colorimetric, fluorometric or chemiluminescent techniques, among others.
- the biological samples are cells expressing the gene encoding lanosterol synthetase, and step c) described above consists in measuring the expression of said gene.
- the cell used here can be of any type. It may be a cell expressing the LSS gene endogenously, such as for example a liver cell, an ovarian cell, or more preferably a sebocyte. It is also possible to use organs of human or animal origin, such as, for example, the preputial gland, clitoral gland or the sebaceous gland of the skin.
- nucleic acid coding for lanosterol synthetase, preferably human, or mammalian.
- a wide variety of host cell systems can be used, such as, for example, Cos-7, CHO, BHK, 3T3, HEK293 cells.
- the nucleic acid can be stably or transiently transfected by any method known to those skilled in the art, for example by calcium phosphate, DEAE-dextran, liposome, virus, electroporation, or microinjection.
- the expression of the LSS gene or the reporter gene can be determined by evaluating the transcription rate of said gene, or its translation rate.
- transcription rate of a gene is meant the amount of the corresponding mRNA produced.
- translation rate of a gene is meant the amount of protein produced.
- the expression of the gene can be measured by real-time PCR or by RNase protection.
- RNase protection is meant the detection of an mRNA known from the poly (A) RNAs of a tissue that can be made using specific hybridization with a labeled probe.
- the probe is a complementary RNA labeled (radioactive) messenger to look for. It can be constructed from a known mRNA whose cDNA, after RT-PCR, has been cloned into a phage.
- RNA-poly (A) of the tissue where the sequence is to be searched is incubated with this probe under slow hybridization conditions in a liquid medium.
- RNA RNA hybrids are formed between the desired mRNA and the antisense probe.
- the hybrid medium is then incubated with a mixture of ribonucleases specific for single-stranded RNA, so that only the hybrids formed with the probe can resist this digestion.
- the digestion product is then deproteinized and repurified, before being analyzed by electrophoresis.
- the labeled hybrid RNAs are detected by autoradiography.
- the translation rate of the gene is evaluated for example by immunological assay of the product of said gene.
- the antibodies used for this purpose may be of polyclonal or monoclonal type. Their production is based on conventional techniques.
- a polyclonal anti-lanosterol synthetase antibody may, inter alia, be obtained by immunizing an animal such as a rabbit or a mouse, using the entire enzyme. The antiserum is removed and then exhausted according to methods known to those skilled in the art.
- a monoclonal antibody can, inter alia, be obtained by the conventional method of Kohler and Milstein (Nature (London), 256: 495-497 (1975)). Other methods of preparing monoclonal antibodies are also known.
- monoclonal antibodies can be produced by expression of a cloned nucleic acid from a hybridoma.
- Antibodies can also be produced by the phage display technique, by introducing antibody cDNAs into vectors, which are typically filamentous phages that have V gene libraries on the surface of the phage. (for example fUSE5 for E.coli).
- the immunoassay can be carried out in solid phase or in homogeneous phase; in a time or in two stages; sandwich method or competitive method, by way of non-limiting examples.
- the capture antibody is immobilized on a solid phase.
- solid phase it is possible to use microplates, in particular polystyrene microplates, or particles or solid beads, paramagnetic beads.
- ELISA assays radioimmunoassays, or any other detection technique can be used to reveal the presence of the antigen-antibody complexes formed.
- the characterization of antigen / antibody complexes, and more generally isolated or purified but also recombinant proteins (obtained in vitro and in vivo) can be performed by mass spectrometry analysis. This identification is made possible thanks to the analysis (determination of the mass) of the peptides generated by the enzymatic hydrolysis of the proteins (trypsin in general). In general, the proteins are isolated according to methods known to those skilled in the art, prior to enzymatic digestion.
- Peptide analysis in the form of a hydrolyzate is carried out by separation of the peptides by HPLC (nano-HPLC) based on their physicochemical properties (reverse phase).
- HPLC nano-HPLC
- the determination of the mass of the peptides thus separated is carried out by ionization of the peptides and either by direct coupling to the mass spectrometer (electrospray mode ESI), or after deposition and crystallization in the presence of a matrix known to those skilled in the art (MALDI mode analysis).
- the proteins are then identified through the use of appropriate software (eg Mascot).
- step a) described above consists in preparing reaction mixtures each comprising an enzyme lanosterol synthetase and a substrate of the enzyme, and step c) described above consists in measuring the enzymatic activity.
- the lanosterol synthetase enzyme can be produced according to standard techniques using Cos-7, CHO, BHK, 3T3, HEK293 cells. It can also be produced using microorganisms such as bacteria (for example E. coli or B. subtilis), yeasts (for example Saccharomyces, Pichia) or insect cells, such as Sf9 or Sf21.
- the determination of the enzyme activity preferably comprises the determination of the synthetase activity, by extraction of the produced sterols and chromatographic analysis.
- lanosterol synthetase cDNA is expressed under the control of a glyceraldehydes-3-phosphate dehydrogenase promoter in yeast deficient in lanosterol synthetase, GIL77 (Kushiro et al., Eur J. Biochem., 256, 238-241, 1998).
- the acellular extract obtained from the transformed yeast cell is used.
- the yeast is therefore homogenized in buffer A [0.1 M potassium phosphate buffer (pH 7.4), 0.45 M sucrose, 1 mM EDTA and 1 mM dithiothreitol] in the presence of glass beads treated with acid.
- the supernatant obtained by centrifugation is brought to the concentration of 10 mg / ml by adding buffer A.
- a substrate 14C (3S) -2,3-oxidosqualene is prepared biosynthetically by culturing GL7 yeast cells deficient in lanosterol (Gollub et al. J. Biol. Chem. 252, 2846- 2854, 1977) in the presence of 14 C sodium acetate, to incorporate the radioactivity into the oxidosqualene.
- the substrate (final concentration, 0.17-0.42 ⁇ M, 4.5 nCi) and the test compound are added to buffer B [0.1 M potassium-phosphate buffer (pH 7.4) and 0.1% Triton X-100] to obtain a total volume of 900 ⁇ l, preincubated at 37 ° C. for 10 minutes, before adding the enzyme (1 mg) to prepare a 1 ml solution, incubated at 37 ° C. for 60 minutes. 6% potassium hydroxide / ethanol is added to stop the reaction, and the mixture is saponified by incubation at 37 ° C for 10 minutes, before adding cyclohexane (2 ml).
- buffer B 0.1 M potassium-phosphate buffer (pH 7.4) and 0.1% Triton X-100]
- the cyclohexane layer is dried, deposited on a thin layer chromatography plate, and developed with a benzene / acetone solvent (19/1, v / v).
- the amounts of unreacted substrate and 14 C lanosterol are then determined by BAS-1500 analyzer (Fuji Photo Film Co., Japan) to calculate the inhibition rate of lanosterol synthesis.
- Modulators of the enzyme also relates to the use of a modulator of the human enzyme lanosterol synthetase, obtainable by one of the above methods, for the preparation of a medicinal product intended for the preventive and / or curative treatment of acne, or skin disorders associated with hyperseborrhoea. It is thus described here a method of preventive and / or curative treatment of acne, or skin disorders associated with hyperseborrhoea, a method comprising the administration of a therapeutically effective amount of a modulator of the human enzyme lanosterol synthetase , to a patient in need of such treatment.
- the invention finally relates to the cosmetic use of a modulator of the human enzyme lanosterol synthetase, for the aesthetic treatment of oily skin.
- the modulator is an inhibitor of the enzyme.
- the term "inhibitor” refers to a compound or a chemical substance that substantially eliminates or reduces the enzymatic activity of lanosterol synthetase.
- the term “substantially” means a reduction of at least 25%, preferably at least 35%, more preferably at least 50%, and more preferably at least 70% or 90%. More particularly, it may be a compound that interacts with, and blocks, the catalytic site of the enzyme, as compounds of the competitive inhibitory type.
- a preferred inhibitor interacts with the enzyme in solution at inhibitor concentrations of less than 1 ⁇ M, preferably less than 0.1 ⁇ M, more preferably less than 0.01 ⁇ M.
- the modulator compound may be an anti-lanosterol synthetase inhibitory antibody, preferably a monoclonal antibody.
- an inhibitory antibody is administered in an amount sufficient to obtain a plasma concentration of about 0.01 ⁇ g per ml to about 100 ⁇ g / ml, preferably from about 1 ⁇ g per ml to about 5 ⁇ g / ml.
- the modulator compound may also be a polypeptide, an antisense DNA or RNA polynucleotide, an si-RNA, or a PNA ("Peptide nucleic acid", a polypeptide chain substituted with purine and pyrimidine bases, whose spatial structure mimes that of DNA and allows hybridization to it).
- PNA Peptide nucleic acid
- lanosterol synthetase inhibitors are known, and proposed for the treatment of hypercholesterolemia.
- the invention comprises the use of such lanosterol synthetase inhibiting compounds for the preventive and / or curative treatment of acne, or cutaneous disorders associated with hyperseborrhoea.
- Other modulator compounds identified by the screening method described above are also useful.
- the modulating compounds are formulated within a pharmaceutical composition, in association with a pharmaceutically acceptable vehicle.
- These compositions may be administered, for example, orally, enterally, parenterally, or topically.
- the pharmaceutical composition is applied topically.
- the pharmaceutical composition can be in the form of tablets, capsules, dragees, syrups, suspensions, solutions, powders, granules, emulsions, suspensions of microspheres or nanospheres or lipid vesicles or polymers for controlled release.
- the pharmaceutical composition may be in the form of solutions or suspensions for infusion or for injection.
- the pharmaceutical composition is more particularly intended for the treatment of skin and mucous membranes and may be in the form of ointments, creams, milks, ointments, powders, soaked swabs, solutions, gels , sprays, lotions or suspensions. It can also be in the form of suspensions of microspheres or nanospheres or lipid or polymeric vesicles or polymeric patches or hydrogels allowing controlled release.
- This composition for topical application may be in anhydrous form, in aqueous form or in the form of an emulsion.
- the pharmaceutical composition is in the form of a gel, a cream or a lotion.
- the composition may comprise a content of LSS modulator ranging from 0.001 to 10% by weight, especially from 0.01 to 5% by weight relative to the total weight of the composition.
- the pharmaceutical composition may further contain inert additives or combinations of these additives, such as
- osmotic pressure modifying agents emulsifying agents
- antioxidants such as alpha-tocopherol, butylhydroxyanisole or butylhydroxytoluene, superoxide dismutase, ubiquinol or certain metal chelators.
- Figures 1A and 1B are graphs that show the extent of LSS gene expression in gonadectomized and vehicle-treated mice, DHT, DHEA or DHEA-Flutamide combination for a period of 7 days. times a day (long-term treatment).
- the results obtained by the Affymetrix technique (FIG. 1A) were confirmed by the RT-PCR technique in real time (FIG. 1B).
- GDX gonadectomized and vehicle-treated mice
- DHT gonadectomized mice treated with Dihydrotestosterone (androgen receptor agonist)
- DHEA gonadectomized mice treated with dihydroepiandrosterone (precursor of steroid hormones, in the preputial glands metabolized to active androgen)
- DHEA-FIu gonadectomized mice treated with a combination of dihydroepiandrosterone and flutamide (androgen receptor antagonists, which blocks the effects DHT and DHEA agonists).
- Figures 2A and 2B are graphs reporting a kinetic study from 15 minutes to 96 hours (Figure 2A) and a kinetic study from 1 hour to 24 hours (Figure 2B).
- Expression level Square mRNA expression level: expression in gonadectomized mice following treatment with DHT at zero time.
- Rhombus expression in gonadectomized mice without DHT treatment.
- the Ctrl-24h point shows the level of expression of lanosterol synthetase of gonadectomized mice not treated with DHT at the 24 hour point.
- the following points come from gonadectomized mice and treated with DHT and indicate the successive times (in hours) of the kinetic study.
- Level of expression level of expression of mRNA
- Figures 3A, 3B and 3C show the expression of LSS in the sebaceous gland of mouse skin by in situ hybridization.
- Figure 3A is a photograph in conventional illumination and dark field illumination of a section of mouse skin subjected to in situ hybridization using a sense probe of LSS (negative control, intact animal 44).
- Figure 3B is a photograph in conventional illumination and dark field illumination of a mouse skin section subjected to in situ hybridization with an antisense probe, in an intact animal (animal 44).
- Figure 3C is a photograph in conventional illumination and dark field illumination of a section of mouse skin subjected to in situ hybridization with an antisense probe, in a gonadectomized animal (animal 53).
- Figures 4A, 4B and 4C show the expression of LSS in the mouse preputial gland by in situ hybridization.
- Figure 4A is a photograph in conventional lighting and dark-field illumination of a prepuce section of mice subjected to in situ hybridization with a sense probe of LSS (negative control, animal 45).
- Figure 4B is a photograph in conventional lighting and dark field illumination of a foreskin section of mice subjected to in situ hybridization with an antisense probe, in an intact animal (animal 45).
- Figure 4C is a photograph in conventional illumination and dark field illumination of a prepuce section of mice subjected to in situ hybridization with an antisense probe, in a gonadectomized animal (animal 53).
- RNA samples were prepared from the sebaceous glands and from the epidermis.
- RNA expression was analyzed on an Affymetrix station (microfluidic module, hybridization oven, scanner, computer) following the protocols provided by the company.
- Affymetrix station microfluidic module, hybridization oven, scanner, computer
- the total RNA isolated from the tissues is transcribed into cDNA.
- biotin-labeled cRNA is synthesized using T7 polymerase and a precursor NTP conjugated to biotin.
- the cRNAs are then fragmented into small fragments. All molecular biology steps are controlled using Agilent's "Lab on a chip" system to confirm the good efficiencies of the enzyme reactions.
- the Affymetrix chip is hybridized with the biotinylated cRNA, rinsed and then fluorescently labeled using a streptavidin-conjugated fluorophore. After washes, the chip is scanned and the results are calculated using the MAS5 software provided by Affymetrix. An expression value is obtained for each gene as well as an indication of the significance of the value obtained. The calculation of the significance of the expression is based on the analysis of the signals that are obtained following the hybridization of the cRNA of a given gene with a perfectly matched oligonucleotide ("perfect match") versus an oligonucleotide that contains a mutation ("single mismatch") in the central region of the oligonucleotide (see Table 1).
- Table 1 Measurement of the expression of lanosterol synthetase in the epidermis and in the human sebaceous gland via the use of the affymetrix flea technology.
- mice show differentiation of the sebocyte type and are used as an experimental model of the sebaceous gland. They are of sufficient size to allow isolation of RNA without the use of microdissection technologies.
- Lanosterol synthetase in the mouse preputial glands was carried out under conditions of steroid hormone deficiencies (in particular in androgenic hormones) following gonadectomy.
- the gonadectomized animals were then treated with physiological amounts of Dihydrotestosterone (DHT) or Dihydroepiandrosterone (DHEA) to restore a physiological level of the androgenic hormones, or as a control experiment with a combination of DHEA-Flutamide in which Flutamide, a Androgen receptor antagonist blocks the effect of DHEA.
- DHT Dihydrotestosterone
- DHEA Dihydroepiandrosterone
- the comparison of the gene expression under these experimental conditions makes it possible to unambiguously identify the modulation or not of the gene expression of a gene in question by the androgenic hormones.
- RNA isolated from the tissues is transcribed (RT) into the cDNA and this is amplified by PCR (Polymerase Chain Reaction).
- PCR Polymerase Chain Reaction
- the progress of the PCR is monitored in real time using fluorescent TaqMan probes, allowing precise quantification of the amount of mRNA of a given gene present in the biological sample at the start.
- the mRNA of lanosterol synthetase is induced by chronic treatment for 7 days with androgens in the preputial gland.
- Figure 2A and Figure 2B show the level of relative expression of mRNA as a function of time.
- Gonadectomy which causes steroid hormone deficiency induces a decrease in the amount of lanosterol synthetase mRNA in the mouse preputial gland.
- the mRNA of lanosterol synthetase in the mouse preputial gland is induced by a short-term treatment with DHT (visible effect at 18, 24 and 96 hours).
- Sense and antisense probes were prepared from the LSS gene by incubation of the linearized gene (2 ⁇ g) with 63 ⁇ Ci of [ 35 S] UTP (1250 Ci / mmol, NEN, Massachusetts, USA) in the presence of T7 RNA polymerase or T3.
- In situ hybridization was performed on formaldehyde-fixed mouse tissue wrapped in paraffin. Sections (4 ⁇ m wide) were then deparaffinized in toluene and rehydrated in an alcohol gradient. After drying, the different sections were incubated in prehybridization buffer for two hours.
- Hybridization took place over night in hybridization buffer (prehybridization buffer with DTT and 1 Omm 2X10 6 cpm RNA / .mu.l Smarqué 35) to 53 ⁇ .
- the excess probe was removed and the sections were slanted in an LM1 emulsion (Amersham Biosciences, UK) and exposed in the dark at 4 ° C for at least one month.
- the sections were then grown and counter stained with hematoxylin and eosin. Hybridization with the sense probe was used as a negative control and only background was detected. These probes were incubated with histological sections of mouse skin or mouse preputial gland.
- Figure 3A shows a strong marking of the basal layer of the sebaceous gland, visible by accumulation of silver grains.
- Figure 3C also shows a marking of the basal layer of the sebaceous gland.
- LSS is expressed in the basal layers of the sebaceous glands of mouse skin.
- mice show differentiation of the sebocyte type and are used as an experimental model of the sebaceous gland.
- Figure 4A shows no marking at the level of the preputial gland which is consistent with the expectations of the inventors because it corresponds to the negative control.
- Figure 4B shows a very strong labeling of the mouse preputial gland in a normal animal.
- Figure 4C shows a more moderate labeling of acini of the preputial gland in a gonadectomized animal.
- LSS is expressed in the preputial gland of mice, particularly in the basal layers of acini.
- An analysis of several histological sections from 4 control animals and 4 gonadectomized animals indicates a significantly stronger expression in the preputial glands of the intact animals.
- in situ hybridization results in the mouse preputial gland indicate that expression of the LSS enzyme increases under conditions characterized by androgenic stimulation (intact animals). These observations are consistent with data obtained by Affymetrix technologies and real-time PCR.
- Example 5 Examples of Compositions
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Urology & Nephrology (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Medicinal Chemistry (AREA)
- Biotechnology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Physics & Mathematics (AREA)
- Cell Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dermatology (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- General Chemical & Material Sciences (AREA)
- Veterinary Medicine (AREA)
- General Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0653026A FR2904002A1 (fr) | 2006-07-19 | 2006-07-19 | Modulateurs de la lanosterol synthetase dans le traitement de l'acne ou de l'hyperseborrhee |
PCT/FR2007/051678 WO2008009852A2 (fr) | 2006-07-19 | 2007-07-18 | Modulateurs de la lanostérol synthétase dans le traitement de l'acné ou de l'hyperséborrhée |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2046980A2 true EP2046980A2 (fr) | 2009-04-15 |
Family
ID=37684869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07823597A Withdrawn EP2046980A2 (fr) | 2006-07-19 | 2007-07-18 | Modulateurs de la lanostérol synthétase dans le traitement de l'acné ou de l'hyperséborrhée |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100021893A1 (fr) |
EP (1) | EP2046980A2 (fr) |
CA (1) | CA2656908A1 (fr) |
FR (1) | FR2904002A1 (fr) |
WO (1) | WO2008009852A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2938343A1 (fr) * | 2008-11-13 | 2010-05-14 | Galderma Res & Dev | Ciblage de modulateurs de cyp2b15 et/ou gpd1 pour le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6278038B1 (en) * | 1992-04-10 | 2001-08-21 | Oregon Health And Science University | Mammalian melanocortin receptors and uses |
WO1997048701A1 (fr) * | 1996-06-20 | 1997-12-24 | Pfizer Inc. | 4,1-benzoxazepines ou 4,1-benzothiazepines et leur utilisation comme inhibiteurs de squalene synthetase |
CA2398219A1 (fr) * | 2000-02-02 | 2001-08-09 | Warner-Lambert Company | Doubles inhibiteurs de la synthese d'ester de choslesterol et d'ester d e cire dans le traitement des troubles des glandes sebacees |
US6737261B2 (en) * | 2001-03-23 | 2004-05-18 | Applera Corporation | Isolated nucleic acid molecules encoding human lanosterol synthase proteins, and related products and processes |
ATE384720T1 (de) * | 2002-08-14 | 2008-02-15 | Neurosearch As | Chinucledin - derivate und deren verwendung |
-
2006
- 2006-07-19 FR FR0653026A patent/FR2904002A1/fr active Pending
-
2007
- 2007-07-18 CA CA002656908A patent/CA2656908A1/fr not_active Abandoned
- 2007-07-18 WO PCT/FR2007/051678 patent/WO2008009852A2/fr active Application Filing
- 2007-07-18 EP EP07823597A patent/EP2046980A2/fr not_active Withdrawn
-
2009
- 2009-01-21 US US12/320,171 patent/US20100021893A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2008009852A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008009852A3 (fr) | 2009-03-19 |
CA2656908A1 (fr) | 2008-01-24 |
WO2008009852A2 (fr) | 2008-01-24 |
FR2904002A1 (fr) | 2008-01-25 |
US20100021893A1 (en) | 2010-01-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2737993A1 (fr) | Modulateurs de fzd2 dans le traitement de l'alopecie | |
FR2938341A1 (fr) | Modulateurs de la monoglyceride lipase dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938338A1 (fr) | Modulateurs de l'acetyl-coenzyme a acyltransferase 1 ou 2 dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
WO2008009855A2 (fr) | Modulateurs de sc4mol dans le traitement de l'acné ou de l'hyperséborrhée | |
WO2008009856A2 (fr) | Modulateurs de hsd17b7 dans le traitement de l'acné ou de l'hyperséborrhée | |
EP2046976A2 (fr) | Modulateurs du transporteur abcd3 dans le traitement de l'acné ou de l'hyperséborrhée | |
WO2008009857A2 (fr) | Modulateurs de la udp-glucose céramide glucosyltransférase dans le traitement de l'acné ou de l'hyperkératinisation | |
WO2008009859A2 (fr) | Modulateurs de scarb-1 dans le traitement de l'acné ou de l'hyperséborrhée | |
FR2938333A1 (fr) | Modulateurs de cidea dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
EP2046979A2 (fr) | Modulateurs de elovl5 dans le traitement de l'acné ou de l'hyperséborrhée | |
EP2046980A2 (fr) | Modulateurs de la lanostérol synthétase dans le traitement de l'acné ou de l'hyperséborrhée | |
FR2938342A1 (fr) | Ciblage de modulateurs de ces1 et/ou ces3 dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938334A1 (fr) | Modulateurs de l'adfp dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
CA2706672A1 (fr) | Modulateurs de egr1 dans le traitement de l'alopecie | |
CA2738002A1 (fr) | Modulateurs de lgr5 dans le traitement de l'alopecie | |
FR2938339A1 (fr) | Modulateurs de la pctp dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938335A1 (fr) | Modulateurs de l'isovaleryl-coenzyme a dehydrogenase dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938340A1 (fr) | Modulateurs de la carnitine octanoyltransferase dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938336A1 (fr) | Modulateurs de gos2 dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938337A1 (fr) | Modulateurs de mcam dans le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee | |
FR2938343A1 (fr) | Ciblage de modulateurs de cyp2b15 et/ou gpd1 pour le traitement de l'acne, d'une dermatite seborrheique ou de l'hyperseborrhee |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
R17D | Deferred search report published (corrected) |
Effective date: 20090319 |
|
17P | Request for examination filed |
Effective date: 20090921 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20110622 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20130201 |