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EP1436395A2 - Methodes d'identification et d'utilisation de modulateurs du recepteur gamma dependant des oestrogenes - Google Patents

Methodes d'identification et d'utilisation de modulateurs du recepteur gamma dependant des oestrogenes

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Publication number
EP1436395A2
EP1436395A2 EP02776223A EP02776223A EP1436395A2 EP 1436395 A2 EP1436395 A2 EP 1436395A2 EP 02776223 A EP02776223 A EP 02776223A EP 02776223 A EP02776223 A EP 02776223A EP 1436395 A2 EP1436395 A2 EP 1436395A2
Authority
EP
European Patent Office
Prior art keywords
errγ
compound
compounds
ligand
hydroxytamoxifen
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Withdrawn
Application number
EP02776223A
Other languages
German (de)
English (en)
Other versions
EP1436395A4 (fr
Inventor
Steven G. GlaxoSmithKline Blanchard
Aaron Bayne GlaxoSmithKline Miller
Lisa A. GlaxoSmithKline Orband-Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SmithKline Beecham Corp
Original Assignee
SmithKline Beecham Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SmithKline Beecham Corp filed Critical SmithKline Beecham Corp
Publication of EP1436395A2 publication Critical patent/EP1436395A2/fr
Publication of EP1436395A4 publication Critical patent/EP1436395A4/fr
Withdrawn legal-status Critical Current

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    • 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
    • G01N33/74—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving hormones or other non-cytokine intercellular protein regulatory factors such as growth factors, including receptors to hormones and growth factors
    • G01N33/743—Steroid hormones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00—Drugs for genital or sexual disorders; Contraceptives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
    • A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P5/00—Drugs for disorders of the endocrine system
    • A61P5/24—Drugs for disorders of the endocrine system of the sex hormones
    • A61P5/30—Oestrogens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • 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
    • G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
    • 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
    • G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
    • G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
    • G01N2333/70567—Nuclear receptors, e.g. retinoic acid receptor [RAR], RXR, nuclear orphan receptors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2500/00—Screening for compounds of potential therapeutic value
    • G01N2500/04—Screening involving studying the effect of compounds C directly on molecule A (e.g. C are potential ligands for a receptor A, or potential substrates for an enzyme A)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/10—Musculoskeletal or connective tissue disorders
    • G01N2800/108—Osteoporosis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/32—Cardiovascular disorders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/36—Gynecology or obstetrics
    • G01N2800/362—Menopause

Definitions

  • the present invention relates to compounds and methods for identifying compounds that interact directly with
  • Estrogen Related Receptor ⁇ (ERR ⁇ ) , and are useful for the treatment of ERR ⁇ -mediated diseases, risk factors, or conditions including, but not limited to, osteoporosis, cancer, menopause, and cardiovascular disease.
  • ERR ⁇ Estrogen Related Receptor ⁇
  • These compounds can also affect the estrogen receptor signaling system, and are useful for the treatment of Estrogen Receptor (ER) -mediated diseases, risk factors, and conditions including, but not limited to, osteoporosis, cancer, menopause, and cardiovascular disease.
  • ER Estrogen Receptor
  • the Estrogen Related Receptor gamma (ERR ⁇ :NR3B3) is an orphan nuclear receptor.
  • ERR ⁇ is the third orphan nuclear receptor in the Estrogen Related Receptor family to be cloned. There are two other receptors in the ERR subfamily, ERR and ERR ⁇ . The sequence identity in the ligand binding domain of ERR ⁇ and ERR ⁇ is 77% (Johnston et . al. Mol. Endo. 1997 11:342-52).
  • ERR ⁇ was found by using glucocorticoid receptor interacting protein 1 (GRIP1) as bait in the yeast two-hybrid system.
  • GRIP1 glucocorticoid receptor interacting protein 1
  • ERR ⁇ is highly expressed in adult tissue such as the brain, skeletal muscle, heart, kidney, and retina. It is also expressed in fetal tissue such as the placenta, brain, heart, skeletal muscle, kidney and lung (Bonnelye et. al. Mol. Endo. 1997 11:905
  • Receptors of the ERR subfamily exhibit 68% amino acid identity to estrogen receptor ⁇ (ER ⁇ ) in the DNA binding domain and 36% identity to ER ⁇ in the Ligand Binding Domain. Thus, receptors of the ERR subfamily are able to bind to the estrogen response element (ERE) . However, despite the similarities between ERRs and ERs, to date there is no detectable binding of estradiol or steroid like estrogen compounds to ERR ⁇ . Further, the overall distribution of ERR ⁇ expressed in the mouse brain indicates functional differences between ERR ⁇ and the ERs (Lorke et al. Molecular Brain Research 2000 77:277-280).
  • the present invention provides methods for identifying compounds which interact with ERR ⁇ .
  • Compositions identified via the methods of the present invention are believed to be useful in the treatment of diseases and conditions such as osteoporosis, cancer, menopause and cardiovascular disease.
  • Estrogen Related Receptor Gamma is a member of the Nuclear Receptor family of transcription regulators, of which ERR ⁇ and ERR ⁇ are close relatives. In humans, ERR ⁇ exists as three distinct splice variants with different tissue distributions. ERR ⁇ l is expressed in brain, placenta, heart, retina. ERR ⁇ 2 is expressed in kidney and pancreas. ERR ⁇ 3 is expressed in skeletal muscle only (Heard et al. Mol. Endo. 2000 14:382-392). The ligand-binding domain of all three ERR ⁇ splice variants is identical so compounds which bind selectively to the LBD of ERR ⁇ will selectively regulate the activity of ERR ⁇ over the other ERR subtypes .
  • the present invention relates to compounds and methods for identifying compounds useful in the treatment of osteoporosis, cancer, menopause, and cardiovascular disease which interact with ERR ⁇ .
  • These compounds are also referred to herein as ligands of ERR ⁇ .
  • interact for purposes of the present invention, it is meant that the compound binds with this receptor. More preferably it is meant that the compound binds with and modulates ERR ⁇ expression and/or activity. It is preferred that the compound binds directly with the receptor at its ligand binding domain, thereby inhibiting the ability of the receptor to bind with other ligands.
  • modulate By “modulate” or “modulating” it is meant that expression of ERR ⁇ is upregulated or downregulated and/or that activity of ERR ⁇ is increased or decreased.
  • Compounds which upregulate expression and/or increase activity of ERR ⁇ are referred to as ERR ⁇ agonists while compounds which downregulate expression and/or decrease activity of ERR ⁇ are referred to as ERR ⁇ antagonists .
  • the present invention also relates to methods for using compounds which interact directly with ERR ⁇ in the treatment of ERR ⁇ mediated diseases, risk factors, or conditions.
  • ERR ⁇ mediated diseases, risk factors, and conditions include, but are not limited to, osteoporosis, cancer, menopause, and cardiovascular disease.
  • additional ERR ⁇ mediated diseases, risk factors, or conditions can be identified based upon tissue distribution of this nuclear receptor as well as current therapies for known compounds which can now be identified in accordance with the present invention as interacting with ERR ⁇ .
  • the compounds of the present invention can also affect the estrogen receptor (ER) signaling system.
  • the present invention also relates to methods for the treatment of ER-mediated diseases, risk factors, and conditions including, but not limited to, osteoporosis, cancer, menopause, and cardiovascular disease.
  • FRET fluorescence resonance emission transfer
  • FRET assays comprise the steps of exposing a sample portion comprising the donor located at a first position and the acceptor located at the second position to light at a first wavelength capable of inducing a first electronic transition in the donor, wherein the donor comprises a complex of lanthanide chelate and a lanthanide capable of binding the chelate and wherein the spectral overlap of the donor emission and acceptor absorption is sufficient to enable energy transfer from the donor to the acceptor as measured by a detectable increase in acceptor luminescence.
  • Various coactivators for use in FRET assays have been described.
  • Examples include, but are not limited to, Steroid Receptor Complex (SRCl) , CREB binding protein (CBP) , and Retinoid Interacting Protein (RIP 140).
  • SRCl Steroid Receptor Complex
  • CBP CREB binding protein
  • RIP 140 Retinoid Interacting Protein
  • RIP140 372-392
  • RIP140 was selected because both mammalian two-hybrid and Biacore experiments indicated a nanomolar interaction between ERR ⁇ and RIP140.
  • coactivators exhibiting similar interactions with ERR ⁇ can also be used in identifying affinity ligands.
  • the assay was set up in a one to one ratio of receptor to coactivator. However, as will also be understood by those of skill in the art upon reading this disclosure, other ratios can be used.
  • a homology model was also developed from the ER ⁇ backbone with sequence analysis of ERR ⁇ . This model showed the phenol binding site of ERs to be retained in the ERRs, thus indicating that a compound containing a phenol could serve as a ligand for ERR ⁇ .
  • LiSA ligand sensing assay
  • a binding assay was also developed to determine if compounds were actually binding at the binding site or disrupting the LiSA in a different manner.
  • the binding assay was developed with a different set of parameters than that of the LiSA assay. No common set of assay conditions is applicable to all nuclear receptors. Accordingly, parameters to be optimized included pH, detergents, carriers, and bead concentrations. By changing several variables at one time, a large number of conditions can be examined through the statistical capabilities of a program called JMP (SAS Institute, Cary NC) . Multiple variables including, but not limited to, buffer, detergents, and carrier, were entered simultaneously into the program with the goal being to increase specific counts while lowering non-specific counts. The parameters that were suggested by the program, namely MOPs, pH7, Tween 20, no carrier and 0.125 mg/ml beads were run in the binding assay. In this assay, binding was determined via competition between 3 H tamoxifen and unlabeled 4- hydroxytamoxifen and/or tamoxifen.
  • analogs of tamoxifen are ligands for ERR ⁇ .
  • tamoxifen see Formula 1
  • 3-hydroxytamoxifen see Formula 2
  • 4-hydroxytamoxifen see Formula 3
  • the most preferred analog is 4- hydroxytamoxifen (see Formula 3)
  • test substances comprise organic molecules, preferably small organic molecules that have a molecular weight of from 50 to 2500 daltons .
  • candidate compounds may comprise biomolecules including saccharides, fatty acids, steroids, purines, pyrimidines, derivative and structural analogs or combinations thereof. These compounds are obtained from a wide variety of sources including libraries of synthetic or natural compounds.
  • known pharmacological agents may be subjected to directed or random chemical modifications, such as acylation, alkylation, esterification, amidification, etc. to produce structural analogs for screening.
  • Compounds may be used in an initial screen of, for example, 10 different compounds per reaction. Those compounds showing inhibition or activation are then tested individually.
  • Compounds may be used at a concentration of from 1 nM to 1000 ⁇ M, preferably from 1 ⁇ M to 100 ⁇ M, more preferably from 1 ⁇ M to 10 ⁇ M.
  • the activity of the compound is compared to activity shown by a known activator or inhibitor of ERR ⁇ .
  • a compound which acts as an inhibitor may produce a 50% inhibition of activity of ERR ⁇ .
  • a compound which acts as an activator may produce 50% of the maximal activity produced using a known activator of ERR ⁇ .
  • Comp'ounds identified as inhibitors or activators of ERR ⁇ are believed to be useful in modulating the activity of this nuclear receptor. Accordingly, these compounds can be used in the prevention and/or treatment of ERR ⁇ - and ER- mediated risk factors, diseases and conditions wherein activation or inhibition of ERR ⁇ or ER is desired.
  • Phenol containing compounds such as tamoxifen and analogs thereof such as 3-hydroxytamoxifen and 4-hydroxytamoxifen, as well as other compounds identified via the ERR ⁇ :RIPl40 FRET assay and/or the ERR ⁇ direct binding assay can be administered in a therapeutically effective amount of the compound, preferably as a pharmaceutically acceptable composition, to treat ERR ⁇ - and ER-mediated diseases, risk factors and conditions including, but not limited to osteoporosis, cancer, menopause and cardiovascular disease.
  • the present invention also relates to pharmaceutically acceptable compositions comprising a compound identified as an ERR ⁇ ligand with one or more pharmaceutically acceptable carriers or excipients.
  • the pharmaceutical composition comprise a compound other than tamoxifen or 4-hydroxytamoxifen.
  • the carrier (s) or excipient(s) must be acceptable in the sense of being compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.
  • ERR ⁇ ligands may be formulated for administration by any route appropriate for the ERR ⁇ - or ER-mediated disease to be treated.
  • Suitable pharmaceutical formulations include, but are not limited to, those for oral, rectal, nasal, topical (including buccal and sublingual) , vaginal or parenteral (including intramuscular, subcutaneous, intravenous, and directly into the affected tissue) administration or in a form suitable for administration by inhalation or insufflation.
  • the formulation may, where appropriate be presented in convenient, discrete dosage units and may be prepared by any method well known in the art of pharmacy. All methods include the step of bringing into association the active ERR ⁇ ligand with a liquid or finely divided solid carrier or both and then, if needed, shaping of the product into the desired formulation.
  • compositions suitable for oral administration may be presented in convenient discrete units including, but not limited to, capsules, cachets, or tablets, each containing a predetermined amount of the ERR ⁇ ligand; as a powder or granules; as a solution, a suspension or as an emulsion.
  • the ERR ⁇ ligand can also be presented as a bolus, electuary, or paste.
  • Tablets and capsules for oral administration may contain conventional excipients such as binding agents, fillers, lubricants, disintegrants, or wetting agents.
  • the tablets may be coated according to methods well known in the art. Timed release formulations, which are known in the art, may also be suitable.
  • Oral liquid preparations may be in the form of, for example, aqueous or oily suspensions, solutions, emulsions, syrups or elixirs, or may be presented as a dry product for constitution with water or other suitable vehicles before use.
  • Such liquid preparations may contain conventional additives such as suspending agents, non- aqueous vehicles, including edible oils, or preservatives.
  • ERR ⁇ ligands of the present invention may also be formulated for parenteral administration, such as by injection, for example bolus injection or continuous ] infusion, and may be presented in unit dose form in ampules, pre-filled syringes, small volume infusion or in multi-dose containers with an added preservative.
  • compositions comprising an ERR ⁇ ligand for parenteral administration may take the form of suspension,' solution or emulsion in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing, and/or dispersing agents.
  • the active ingredient may be in powder form, obtained by asceptic isolation of sterile solid or by lyophilization from solution, for constitution with a suitable vehicle such as sterile, pyrogen free water, before use.
  • ERR ⁇ ligands of the present invention may be formulated as ointments, creams, or lotions, or as a transdermal patch.
  • Ointments and creams may, for example, be formulated with an aqueous or oily base with the addition of suitable thickening and/or gelling agents.
  • Lotions may be formulated with an aqueous or oily base and will in general also contain one or more emulsifying agents, stabilizing agents, suspending agents, thickening agents, or coloring agents.
  • Formulations suitable for topical administration in the mouth include lozenges comprising an ERR ⁇ ligand in a flavored base, usually sucrose and acacia or tragacanth; pastilles comprising the active ingredient in an inert base such as gelatin and glycerin or sucrose and acacia; and mouth washes comprising the active ingredient in a suitable liquid carrier.
  • the ERR ⁇ ligands of the present invention can be made up in solution or suspension in a suitable sterile aqueous or non-aqueous vehicle. Additives such as buffers (e.g. sodium metabisulphite or disodium edeate) and thickening agents such as hypromellose can also be included.
  • compositions suitable for rectal administration wherein the carrier is a solid are preferably presented as unit dose suppositories.
  • Suitable carriers include cocoa butter and other materials commonly used in the art, and the suppositories may be conveniently formed by admixture of the ERR ⁇ ligand with the softened or melted carrier or carriers followed by chilling and shaping in molds .
  • Formulations suitable for vaginal administration may be presented as pessaries, tampons, creams, gels, pastes, foams, or sprays containing in addition to the ERR ⁇ ligand such carriers as are known in the art to be appropriate.
  • ERR ⁇ ligands of the present invention can be used as a liquid spray or dispersible powder or in the form of drops. Drops may be formulated with an aqueous or non-aqueous base also comprising one or more dispersing agents, solubilizing agents, or suspending agents. Liquid sprays are conveniently delivered from pressurized packs.
  • ERR ⁇ ligands of the present invention can be delivered by insufflator, nebulizer or a pressurized pack or other convenient means of delivering the aerosol spray.
  • Pressurized packs may comprise a suitable propellant such as dichlorodifluoro ethane, trichlorofluoromethane, dichlorotetrafluoroethane, carbon dioxide or other suitable gas.
  • the dosage unit may be determined by providing a valve to deliver a metered amount .
  • the ERR ⁇ ligands of the present invention can take the form of a dry powder composition, for example a powder mix of an ERR ⁇ ligand and a suitable powder base such as lactose or starch.
  • the powder composition may be presented in unit dosage form in, for example, capsules, cartridges or blister packs of gelatins, from which the powder can be administered with the aid of an inhalator or insufflator.
  • any of the above-described formulations may be adapted to provide sustained release of the ERR ⁇ ligand.
  • compositions of the present invention comprising an ERR ⁇ ligand can also used in combination with other therapeutic agents.
  • the amount of an ERR ⁇ ligand of the present invention required for use in treatment will of course vary not only with the particular ERR ⁇ ligand selected but also with the route of administration, the nature of the condition being treated, and the age and condition of the patients. Selection of such an amount, referred to herein as the "therapeutically effective amount or concentration" is ultimately at the discretion of the attending physician.
  • suitable doses of pharmaceutical compositions of the present invention providing a therapeutically effective amount of an ERR ⁇ ligand will be in the range of from about 0.1 to 300 mg/kg of bodyweight per day, particularly from about 1 to 100 mg/kg of bodyweight per day.
  • An appropriate dosage unit for oral administration generally contains from about 1 to about 250 mg, more preferably 25 to 250 mg of an ERR ⁇ ligand.
  • compositions comprising an ERR ⁇ ligand can be administered by any of the aforementioned routes, preferably by the oral route or by injection.
  • the daily dosage for a 70 kg mammal will typically be in the range of about 5 mg to 5 grams of an ERR ⁇ ligand of the present invention.
  • ERR ⁇ LBD Human Estrogen Related Receptor ⁇ Ligand Binding Domain
  • This lysate was loaded onto a column (XK-26, 10cm) packed with Sepharose [Ni ++ charged] Chelation resin (Pharmacia) and pre-equilibrated with TBS pH 8.0 / 50mM imidazole. After washing to baseline absorbance with equilibration buffer, the column was washed with approximately one column volume of TBS, pH 8.0 (containing 95mM imidazole) . ERR ⁇ LBD (229-458) was eluted with a linear gradient of 50 to 500 mM imidazole in TBS pH 8.0.
  • Peak fractions were pooled and concentrated using Centri-prep 10K (TAmicon) filter devices and subjected to size exclusion chromatography using a column (XK-26, 90 cm) packed with Superdex 75 column (Pharmacia) pre-equilibrated with TBS, pH 8.0 (containing 5 % 1, 2-propanediol, 5 mM DTT and 0.5 mM EDTA).
  • ERR ⁇ LBD was buffer exchanged using PD-10 gel filtration columns into PBS [100 mM NaPhosphate, pH 8.0, 150 mM NaCl] .
  • ERR ⁇ LBD was diluted to approximately 50 ⁇ M in PBS and five-fold molar excess of NHS-LC-Biotin (Pierce) was added in a minimal volume of PBS. This solution was incubated with gentle mixing for 2 hours at ambient room temperature. The biotinylation modification reaction was stopped by the addition of 2000x molar excess of Tris-HCl, pH 8.0.
  • the modified ERR ⁇ LBD was dialyzed against 3 buffer changes, each of at least 50 volumes; TBS, pH 8.0 (containing 5 mM DTT, 2 mM EDTA and 2% sucrose) .
  • This modified protein was distributed into aliquots, frozen on dry ice and stored at -80°C.
  • the biotinylated ERR ⁇ LBD was subjected to mass spectrometric analysis to reveal the extent of modification by the biotinylation reagent. In general, approximately 95% of the protein had at least a single site of biotinylation; and the overall extent of biotinylation followed a normal distribution of multiple sites, ranging from one to five.
  • Example 4 LiSA Protein-protein interactions were assayed by FRET detection. Proteins were set up in a one to one ratio of Europium labeled streptavidin (Wallac CR28-100) -ERR ⁇ : APC labeled streptavidin (Molecular Probes #S-868) -RIP140 Complex.
  • the RIP140 peptide (LCD2, 373-392) B- LERNNIKQAANNSLLLHLLKSQTIP-CONH 2 (SEQ ID NO: 3) was prepared by SynPep. In this sequence, B represents biotin, CONH 2 indicates an amidated C-terminus and the other letters refer to the standard one letter amino acid code.
  • the buffer for this system was made at 50 mM Hepes (pH 7), 50 mM KC1, 1 mM EDTA, in 1 L of deionized water. This buffer was then filtered with the Corning (431205) filter system with a 0.22 ⁇ m cellulose Acetate filter. After filtering there was an addition of 0.1 mg/mL BSA (fatty acid free), and 2 mM Chaps. Before using the buffer in the assay lOmM DTT was added to the appropriate amount of buffer. The proteins were incubated for 30 minutes then excess biotin was added to fill vacant streptavidin (SA) sites. Protein mixture was added to prepared plates. They were then counted on the Wallac, Victor, and counts were then analyzed.
  • SA streptavidin
  • Binding assays were performed with [ 3 H] -Tamoxifen (Amersham) .
  • the same ERR ⁇ protein as set forth in Example 4 was used to develop the binding assay.
  • the buffer for this system was prepared with 50 mM MOPS (pH 7), 50 mM KCl, and 1 mM EDTA, in 1 L of deionized water. This buffer was then filtered with the Corning (431205) filter system with a 0.22 ⁇ m cellulose Acetate filter. After filtering, 0.01% Tween20 was added. Before using the buffer in the assay, 10 mM DTT was added to the appropriate amount of buffer.

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Abstract

La présente invention concerne des méthodes d'identification de composés qui interagissent avec le récepteur gamma dépendant des oestrogènes (RGDO) et qui sont utiles dans le traitement des maladies induites par RGDO et par les récepteurs des oestrogènes (RO), des facteurs de risque et des affections. Cette invention se rapporte également à des compositions pharmaceutiques contenant des composés qui interagissent directement avec RGDO et des méthodes d'utilisation de ces compositions dans le traitement des maladies induites par RGDO et RO, des facteurs de risque et des affections.
EP02776223A 2001-10-16 2002-10-16 Methodes d'identification et d'utilisation de modulateurs du recepteur gamma dependant des oestrogenes Withdrawn EP1436395A4 (fr)

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US32988801P 2001-10-16 2001-10-16
US329888P 2001-10-16
PCT/US2002/032917 WO2003034028A2 (fr) 2001-10-16 2002-10-16 Methodes d'identification et d'utilisation de modulateurs du recepteur gamma dependant des oestrogenes

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EP1436395A2 true EP1436395A2 (fr) 2004-07-14
EP1436395A4 EP1436395A4 (fr) 2006-12-13

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AU2002342058A1 (en) 2003-04-28
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EP1436395A4 (fr) 2006-12-13

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