WO2013172732A1 - Комплексные соединения германия, способы их получения и лекарственные средства - Google Patents
Комплексные соединения германия, способы их получения и лекарственные средства Download PDFInfo
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- WO2013172732A1 WO2013172732A1 PCT/RU2012/000897 RU2012000897W WO2013172732A1 WO 2013172732 A1 WO2013172732 A1 WO 2013172732A1 RU 2012000897 W RU2012000897 W RU 2012000897W WO 2013172732 A1 WO2013172732 A1 WO 2013172732A1
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- germanium
- guanine
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H23/00—Compounds containing boron, silicon, or a metal, e.g. chelates, vitamin B12
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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
- A61K31/28—Compounds containing heavy metals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/52—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an inorganic compound, e.g. an inorganic ion that is complexed with the active ingredient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/54—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
- A61K47/542—Carboxylic acids, e.g. a fatty acid or an amino acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/54—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
- A61K47/547—Chelates, e.g. Gd-DOTA or Zinc-amino acid chelates; Chelate-forming compounds, e.g. DOTA or ethylenediamine being covalently linked or complexed to the pharmacologically- or therapeutically-active agent
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
- A61P27/02—Ophthalmic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/20—Antivirals for DNA viruses
- A61P31/22—Antivirals for DNA viruses for herpes viruses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/30—Germanium compounds
Definitions
- the invention relates to medicine and pharmacology, in particular to the development of drugs intended for the prevention and / or treatment of various viral diseases, in particular caused by herpes viruses, and also used as part of complex anti-cancer and immunotherapy.
- the invention relates to new complex compounds of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, preferably, amino acids.
- the invention relates to complex compounds of germanium with derivatives of adenine and / or guanine, preferably acyclovir, valacyclovir, ganciclovir, penciclovir, vidarabine and others are used.
- the proposed compounds provide a high level of biological, in particular, antiviral activity against herpes viruses, for example, herpes simplex viruses type 1 and 2, including resistant strains, for example, acyclovir-resistant stamps.
- guanine derivatives are used as medicines for the treatment and prevention of various viral infections, in particular infections caused by the herpes virus, including as part of complex therapy in the treatment of HIV-infected and cancer patients, as well as in organ transplantation .
- guanine derivatives are used as antiviral drugs, in particular for the treatment of herpes virus infections.
- Herpes is the most common human disease caused by the herpes virus. Eight types of herpes viruses are known, among which the most famous are the herpes simplex virus type 1 and 2 (HSV-1 and HSV-2), Varicella-Zoster virus (HHV-3), Epstein-Barr virus (HHV-4), cytomegalovirus (HHV- 5) and others. In the world, a significant part of the population is infected with herpes viruses in the form of a latent infection. The herpes virus is in the nerve cells of an infected person constantly, but clinically the disease manifests itself only in the period of exacerbation, i.e. active reproduction of the pathogen.
- HSV-1 is the cause of diseases such as keratitis, "cold on the lips", encephalitis
- HSV-2 causes genital infections
- HHV-3 causes chickenpox and shingles
- HHV-4 is the cause of infectious mononucleosis
- HHV-5 - cytomegalovirus hepatitis, colitis, pneumonitis.
- Acyclovir which is a derivative of guanine, and which prevents the multiplication of the virus in cells, has become widespread as such a drug.
- acyclovir effectively prevents the proliferation of viruses when used in large doses, in particular, when taking the drug inside, it is used in an amount up to 4000 mg / day.
- an increase in a single dosage of acyclovir leads to a decrease in its bioavailability, which can cause drug toxic effects on the body.
- acyclovir Another disadvantage of acyclovir is its low solubility in water: 1.3 mg / ml at 25 ° C and 2.5 mg / ml at 37 ° C, while acyclovir is practically insoluble in hydrophobic systems. Therefore, when taking acyclovir inside, there is a possibility of the formation of small crystals in the urine (Mason W.J., Nickols N.N., Crystalluria from acyclovir use, N. Engl. J. Med., 2008, 358: el4) and the appearance of nephrotoxicity. In addition, recently acyclovir resistant strains of herpes viruses have been increasingly appearing, especially in people with reduced immunity.
- Valaciclovir is a modified form of acyclovir and has greater efficacy and bioavailability: 54% versus 15-20% for acyclovir. Nevertheless, valaciclovir, like acyclovir, is effective only in large doses of 1000-4000 mg / day.
- penciclovir and ganciclovir which are active against herpes simplex viruses type 1 and 2 (HSV-1 and HSV-2), Varicella-Zoster virus, Epstein-Barr virus, cytomegalovirus infections and which are used to treat and prevention of infections caused by these viruses, including for the treatment and prevention of immunocompromised individuals, such as AIDS patients, as well as cancer patients and organ transplants.
- HSV-1 and HSV-2 herpes simplex viruses type 1 and 2
- Varicella-Zoster virus Epstein-Barr virus
- cytomegalovirus infections which are used to treat and prevention of infections caused by these viruses, including for the treatment and prevention of immunocompromised individuals, such as AIDS patients, as well as cancer patients and organ transplants.
- a common disadvantage of penciclovir and Ganciclovir is their low solubility in water (penciclovir - 0.17%, ganciclovir - 0.43%,), as well as low bioavailability (1.5% and 5%, respectively).
- Antiviral drugs should have the following properties: penetrate the cell, have minimal cytotoxicity, act selectively, not addictive, and not accumulate in the body. Therefore, one of the directions in the creation of new dosage forms was the search for compounds that, in combination with already known drugs, improve their antiviral activity.
- EP 0 477 871 (1992, IPC A61K 31/52) discloses an antiviral composition having selective and synergistic activity against herpes simplex viruses type 1 and 2.
- the antiviral composition consists of at least two compounds representing guanine derivatives: oxetanocin G (OXT-G), acyclovir (ACV), carbocyclic oxetanocin G C-OXT-G).
- the combination of acyclovir (0.04-0.4 ⁇ g / ml) with oxetanocin G (0.4-5.4 ⁇ g / ml) or with carbocyclic oxetanocin G (0.01-0.2 ⁇ g / ml) provides a synergistic effect in relation to the HSV-1 virus
- the combination of acyclovir (0.1-3.4 ⁇ g / ml) with oxetanocin G (0.4-4 ⁇ g / ml) or with carbocyclic oxetanocin G (0.04-0.54 ⁇ g / ml) provides a synergistic effect in relation to the HSV-2 virus.
- compositions based on netropsin or its bis-derivative with acyclovir and ganciclovir are provided, providing a high level of antiviral activity against herpes simplex virus type 1 (HSV-1).
- HSV-1 herpes simplex virus type 1
- Combinations of compounds of netropsins with acyclovir and ganciclovir provide a significant increase in antiherpetic action compared to each of the combined antiviral substances taken separately. So with the combined use of netropsin (2.5 ⁇ g / ml) and bis-netropsin (0.15 ⁇ g / ml) with acyclovir, 50% inhibition of the development of virus-induced cytopathic effect is achieved at a concentration of acyclovir of 0.075 ⁇ g / ml and 0.15 ⁇ g / ml , which is 5 and 3 times less, respectively, than when using only one acyclovir (0.4 ⁇ g / ml). The combination of netropsin and bis-netropsin with ganciclovir reduces the concentration of ganciclovir by 5 times.
- US Pat. No. 6,448,227 discloses a mixture containing S-acetyl glutathione and acyclovir as an anti-herpes simplex virus or Varicella-Zoster virus.
- Glutathione is a ⁇ -glutamylcysteinylglycine tripeptide.
- S-acetyl glutathione is an effective agent against herpes simplex virus (HSV-1) starting at concentrations of 0.35 mg / ml
- acyclovir is especially effective at concentrations of 0.45 ⁇ g / ml.
- the combination of S-acetyl glutathione and acyclovir leads to a strong synergistic effect against HSV-1. For example, if you use S-acetyl glutathione (0.7 mg / ml) with acyclovir (0.45 ⁇ g / ml), then the titer of the virus is not determined.
- compositions of S-acetyl glutathione (0.35 mg / ml) with three different concentrations of acyclovir show a noticeable synergistic effect against the Varicella-Zoster virus, especially strong at a concentration of acyclovir of 0.9 ⁇ g / ml.
- compositions consisting of germatran derivatives with foscarnet or acyclovir were tested on male guinea pigs infected with the HSV-2 herpes simplex virus. Clinical studies have shown that the use of germatran derivatives in compositions together with foscarnet or acyclovir enhances the effect of the latter 2-4 times in the treatment of HSV-2.
- compositions of xanthates are claimed in combination with antiviral drugs for the treatment of viral diseases.
- xanthates especially tricyclodecan-9-yl-xanthogenate (D609), are well known as substances with antiviral and antitumor activity.
- xanthates as antiviral drugs is complicated by the fact that high concentrations of these agents are required for the effective treatment of living organisms.
- the patent demonstrates that the use of xanthate derivatives, such as D609, in combination with acyclovir leads to increased antiviral activity.
- xanthate derivatives such as D609
- the activity of acyclovir in cell culture increased by 5 times.
- the combination of D609 and acyclovir ensured the survival of all animals infected with HSV-1 virus.
- the authors of this invention offer a fundamentally different approach to solving the problem of improving the antiviral activity of known compounds.
- the invention provides complex compounds of germanium with derivatives of the nitrogenous bases of the purine series, hydroxycarboxylic acids and amino acids, while these complex compounds of germanium are individual chemical compounds with improved biopharmaceutical characteristics, in particular, high solubility in water compared with the corresponding derivatives of nitrogenous bases, and exhibit higher antiviral activity and immunostimulating activity than with tvetstvuyuschie derivatives of nitrogenous bases.
- the aim of the present invention is the proposal of new complex compounds of germanium with derivatives of nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids with antiviral activity, in particular against herpes viruses.
- Another objective of the invention is to propose new complex compounds of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids with higher antiviral activity, in particular against herpes viruses, compared with the antiviral activity of derivatives corresponding nitrogen bases.
- Another objective of the invention is the proposal of new complex compounds of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids that have good solubility in water.
- Another objective of the invention is to develop a simple method for producing complex compounds of germanium with various derivatives of the nitrogenous bases of the purine series (nucleoside analogues), various in nature hydroxycarboxylic acids, and various in nature amino acids that are stable in the solid state and can easily be converted into an aqueous solution.
- Another objective of the invention is the development of such a method for producing complex compounds of germanium with derivatives of nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably amino acids, which allows you to adjust the ratio of germanium, a derivative of the nitrogenous base of the purine series, hydroxycarboxylic acid and amino acids in complex compound, that is, to regulate the composition of the complex compound.
- Another objective of the invention is the proposal of an antiviral drug containing, as an active component, a complex compound of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids.
- Another objective of the invention is the use of complex compounds of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids to obtain a drug to improve immunity.
- Another objective of the invention is the use of complex compounds of germanium with derivatives of the nitrogenous bases of the purine series (nucleoside analogues), hydroxycarboxylic acids and, optionally, but preferably, amino acids for the treatment and / or prevention of viral diseases, in particular diseases caused by the herpes virus.
- AD is a derivative of the nitrogenous base of the purine series with antiviral activity
- CA is hydroxycarboxylic acid
- Derivatives of the nitrogenous bases of the purine series use derivatives of adenine and / or guanine, preferably acyclovir, valacyclovir, ganciclovir, penciclovir, vidarabine are used.
- hydroxycarboxylic acid citric, lactic and / or malic acid is preferably used.
- the amino acids are preferably arginine, glycine, lysine, threonine.
- Germanium complex compounds of structural formula (I) are individual chemical compounds that are readily soluble in water and which can be isolated in solid form.
- Germanium complex compounds of structural formula (I) containing derivatives of the nitrogenous bases of the purine series exhibit high antiviral and immunostimulating activity.
- a method for producing germanium complex compounds of structural formula (1) _ includes mixing germanium dioxide with water to obtain an aqueous suspension of germanium dioxide, adding a mixture of hydroxycarboxylic acid, a derivative of the nitrogenous base of the purine series, and optionally, but preferably, amino acids, heating the resulting mixture at a temperature of 40-100 ° C for 3-14 hours to form the target product, removing water by any known method to obtain a powdered product KTA.
- a mixture of several amino acids of different chemical nature and / or a mixture of hydroxycarboxylic acids of various chemical nature can be added to an aqueous suspension of germanium dioxide, and / or a mixture of various derivatives of the nitrogenous bases of the purine series.
- New germanium-organic complex compounds containing derivatives of the nitrogenous bases of the purine series are obtained, the composition of which is described by the following structural formula:
- AD is a derivative of the nitrogenous base of the purine series with antiviral activity
- CA is hydroxycarboxylic acid
- AA is an amino acid selected from various a-amino acids
- x can be 1 or 2
- y can be 2, 3 or 4
- z can be 0, 1 or 2 that is, x, y, z are integers.
- Derivatives of the nitrogenous bases of the purine series are derivatives of adenine and / or guanine, which have antiviral activity, in particular against herpes viruses. Such derivatives are well known in the prior art. Examples of such compounds are cyclo-viral guanine derivatives such as acyclovir (9 - [(2-hydroxyethoxy) methyl] guanine), valaciclovir (2- (guanine-9-ylmethoxy) L-valine ethyl ester), ganciclovir (9- [(1,3-dihydroxy-2-propoxy) methyl] guanine), penciclovir (9- [4-hydroxy-3- (hydroxymethyl) butyl] guanine), etc.
- adenine derivatives can also be used according to the invention, for example, vidarabine (9-P-0-ribofuranosyladenine).
- vidarabine (9-P-0-ribofuranosyladenine).
- nucleoside analogues In this application, these terms are used interchangeably.
- guanine derivatives that have antiviral activity are used as derivatives of the nitrogen bases of the purine series (AD).
- AD purine series
- hydroxycarboxylic acids (CA) in the method according to the invention can be used various hydroxycarboxylic acids, such as citric, milk, apple and others.
- citric acid is used in the process.
- amino acids (AA) Any ⁇ -amino acids may be used as amino acids (AA) in the method according to the invention, arginine, glycine, lysine, threonine are preferred, arginine and lysine are most preferred.
- Compounds of structural formula (I) are individual chemical compounds that can be isolated in the solid state as an amorphous powder.
- Individual chemical compounds of formula (I) are germanium-organic compounds containing several biologically active components in a single molecule, such as germanium and a nitrogenous derivative that exhibits antiviral activity. This provides the proposed compounds with high antiviral and immunostimulating activity.
- the presence of hydroxycarboxylic acid and amino acids in the complex also provides the compounds with high solubility in water.
- amino acids and hydroxycarboxylic acids increase the biological activity of the complex compounds of formula (I).
- the method according to the invention is characterized in that germanium dioxide is mixed with water to obtain an aqueous suspension.
- a nitrogenous base derivative hydroxycarboxylic acid and an amino acid or a nitrogenous base derivative and hydroxycarboxylic acid.
- the mixture is stirred at 40-100 ° C for 3-14 hours to obtain a solution of the target product, then water is removed by any known method and the target product is obtained in the form of a white amorphous powder.
- germanium dioxide As germanium dioxide, germanium dioxide of both ⁇ -modification, which is insoluble in water, and ⁇ -modification, which is soluble in water, can be used. It is preferable to use germanium dioxide a-modification, which is not soluble in water, and when mixed with water forms suspension of germanium dioxide in water.
- Derivatives of the nitrogenous bases of the purine series use derivatives of adenine or guanine, which have antiviral activity, in particular against herpes viruses.
- the cyclo-viral derivatives of guanine are used in the method, such as acyclovir (9 - [(2-hydroxyethoxy) methyl] guanine), valaciclovir (2- (guanine-9-ylmethoxy) ethyl ester of L-valine), ganciclovir (9- [(1,3-dihydroxy-2-propoxy) methyl] guanine), penciclovir (9- [4-hydroxy-3-
- adenine derivatives for example, vidarabine (9- ⁇ - ⁇ -ribofuranosyladenine), are used in the method of the invention.
- hydroxycarboxylic acids such as citric, lactic, malic and others can be used.
- citric acid is used in the process.
- amino acids (AA) Any ⁇ -amino acids may be used as amino acids (AA) in the method according to the invention, arginine, glycine, lysine, threonine are preferred, arginine and lysine are most preferred.
- the ratio of germanium, a derivative of the nitrogenous base of the purine series, hydroxycarboxylic acid and amino acid in the germanium complex depends on the amount of these components that are added to the aqueous suspension of germanium dioxide. By adjusting the ratio between the amount of germanium dioxide and the amount of the derivative of the nitrogenous base of the purine series, hydroxycarboxylic acid and amino acids, complex compounds with different ratios of germanium, the derivative of the nitrogenous base of the purine series, hydroxycarboxylic acid and amino acids can be obtained.
- a complex compound is formed in which the molar ratio between the derivative of the nitrogenous base of the purine series and germanium dioxide is 1: 1.
- the ratio can be adjusted between germanium and a derivative of the nitrogenous base of the purine series in the resulting complex compound.
- the ratio of germanium to hydroxycarboxylic acid and amino acid can be controlled in the complex compound.
- hydroxycarboxylic acid (or amino acids) to an aqueous solution with germanium dioxide in a stoichiometric ratio
- a complex compound is formed in which the molar ratio of germanium to hydroxycarboxylic acid (or amino acid) is 1: 1.
- a complex compound with a molar ratio of hydroxycarboxylic acid (or amino acid) to germanium is 2: 1.
- the temperature at which the reaction of the formation of the target complex compound of germanium with derivatives of the nitrogenous bases of the purine series, hydroxycarboxylic acids and optionally, but preferably amino acids is 40-100 ° C.
- a temperature of 80-100 ° C is preferred, a temperature of 85-100 ° C is more preferred.
- the reaction time is 3-14 hours.
- the reaction time is 5-12 hours, even more preferably 6-8 hours.
- germanium-organic complex compound is controlled by the complete dissolution of germanium dioxide (in the case of using insoluble germanium dioxide) and the formation of a clear solution. Any other methods for controlling product formation, for example, based on sampling and analysis, may be used.
- the solution is filtered, and then water is removed from the solution by any known method.
- any of the known methods can be used, for example, evaporation of water, vacuum distillation by heating or freeze-drying (freeze-drying).
- the target compounds are obtained as an amorphous powder.
- Derivatives of the nitrogenous base of the purine series, hydroxycarboxylic acids and amino acids can be added to an aqueous suspension of germanium dioxide at the same time or by sequential introduction of these components.
- the order of introduction of the components does not significantly affect the resulting target product - a complex of germanium with derivatives of the nitrogenous base of the purine series, hydroxycarboxylic acids and amino acids, if any.
- One method variant is a method in which hydroxycarboxylic acid is added to an aqueous suspension of germanium dioxide, the resulting mixture is heated with stirring at 80-100 ° C for 6-10 hours until a clear solution is formed, then an amino acid and a derivative of the nitrogenous base of the purine series are added to in particular, guanine, and continue heating at 80-100 ° C for 2-3 hours, the solution is filtered and water is removed to obtain a complex compound
- Another variant of the method is a method in which an amino acid is added to an aqueous suspension of germanium dioxide, the resulting mixture is heated with stirring at 80-100 ° C for 3-5 hours until a clear solution is formed, then hydroxycarboxylic acid and a derivative of the nitrogenous base of the purine series are added, in particular, guanine, and continue heating at 80-100 ° C for 3-5 hours, the solution is filtered and water is removed to obtain the complex compound in solid form.
- Another variant of the method is a method in which an amino acid and hydroxycarboxylic acid are added to an aqueous suspension of germanium dioxide, the resulting mixture is heated with stirring at 80-100 ° C for 6-8 hours until a clear solution is formed, then a derivative of the nitrogenous base of the purine series is added, in particular, guanine, and continue heating at 80-100 ° C for 2-3 hours, the solution is filtered and water is removed to obtain the complex compound in solid form.
- Another variant of the method is a method in which a mixture of an amino acid, hydroxycarboxylic acid and a derivative of the nitrogen base of the purine series, in particular guanine, is added to an aqueous suspension of germanium dioxide, the resulting mixture is heated with stirring at 80-100 ° C for 6-12 hours forming a clear solution, the solution is filtered and water removed to obtaining complex compounds in solid form.
- Another method variant is a method in which hydroxycarboxylic acid is added to an aqueous suspension of germanium dioxide, the resulting mixture is heated with stirring at 80-100 ° C for 8-9 hours until a clear solution is formed. Then a derivative of the nitrogenous base of the purine series, in particular guanine, is added, and heating is continued at 80-100 ° C for 2-3 hours, the solution is filtered and water is removed to obtain the complex compound in solid form.
- the resulting product is a white amorphous powder, which is readily soluble in water. It should be noted that most of the derivatives of guanine, as a rule, are hardly soluble in water (with the exception of valacyclovir). So the solubility in water of acyclovir is 2.5 mg / ml at 37 ° C, the solubility in water of ganciclovir is 4.3 mg / ml at 25 ° C, the solubility in water of penciclovir is 1.74 mg / ml at 20 ° C, the solubility in water, valaciclovir is 174 mg / ml at 25 ° C.
- derivatives of adenine have limited solubility in water, for example, the drug vidarabine is poorly soluble in water and is used as an ointment.
- the germanium complexes obtained according to the invention have good solubility in water of more than 25 wt.% At 20 ° C, i.e. more than 250 mg / ml at 20 ° C.
- the high solubility of the germanium complex compounds obtained according to the invention makes it possible to obtain and use aqueous solutions with a high concentration of these compounds as antiviral drugs without the side effects of nephrotoxicity.
- AD is a derivative of the nitrogenous base of the purine series with antiviral activity
- CA is hydroxycarboxylic acid
- AA is a-amino acid
- germanium-containing compounds of the base of the purine series as well as amino acids and hydroxycarboxylic acids gives the complex compounds high biological activity and good solubility in water, and they can be useful in the development and preparation of new pharmaceutical compositions and drugs for various medical applications.
- germanium complex compounds exhibiting very high biological activity can be obtained, on the basis of which highly effective pharmaceutical preparations can be obtained. It is proposed to use the germanium complex compounds proposed according to the invention as the active component of such pharmaceutical preparations and medicines.
- the proposed complex compounds of germanium exhibit the same type of biological activity as those of the base of the purine series.
- the complex compound of germanium can also exhibit a different type of biological activity, which is not characteristic of those initial components that make up its composition.
- Germany complex compounds should be used in effective amounts.
- pharmaceutical compositions and preparations may also contain traditional auxiliary components, which are well known from the prior art.
- Example 1 For the germanium complex compound obtained in Example 1, NMR and IR spectra were obtained and analyzed, and also elemental analysis data were obtained.
- FIG. 1 The ⁇ NMR spectrum in D 2 0 of the complex compound of germanium with arginine, citric acid and acyclovir is presented.
- FIG. Figure 2 shows the IR spectrum of a complex compound of germanium with arginine, citric acid, and acyclovir.
- the elemental analysis data of the compound obtained in Example 1 are presented in Table 1. Next, the compound obtained in Example 1 is designated as WDS-1.
- Example 5 NMR and IR spectra of the compound obtained in Example 5 are shown in FIG. 3 and 4, respectively. Elemental analysis data are presented in Table 1. The compound is hereinafter referred to as WDS-5.
- Arg - arginine Gly - glycine, Lys - lysine, Thr - threonine, Citr - citric acid, Mai - malic acid, Acv - acyclovir, Vcv - valaciclovir, Gcv - ganciclovir, Pcv - penciclovir, Vdrb - vidarabine
- the acute toxicity of new compounds obtained, in particular, according to Examples 1, 5 and 6, was determined on non-linear white male mice weighing 18-20 g with a single intragastric (iv) administration at doses of 1000, 2000, 3000, 4000 and 5000 mg / kg of a 20% aqueous solution of 0.1; 0.2; 0.3; 0.4; and 0.5 ml per 20 g of mouse weight, respectively.
- the introduction of each of the compounds was carried out separately. Within 14 days after the introduction of each of the compounds there were no signs of intoxication, lag in weight gain and death of animals. In the interval of the studied doses, no violation of animal movements, reflexes, and behavior was observed.
- mice Anatomical studies did not detect changes in the lungs, kidneys, spleen or other organs.
- the LD50 value for the studied compounds was more than 5000 mg / kg, which allows them to be classified as hazard class IV in accordance with the hazard classification of substances according to the degree of exposure to the body according to GOST 12.1.007-76 or toxicity class V (practically non-toxic substances) by Hodge, Sterner (1943).
- the studied substances do not accumulate in the body and do not possess cumulative properties.
- intragastric administration to nonlinear mice for 14 days at a dose of 1000 mg / kg, there were no deaths of animals, changes in body weight, and weight coefficients of parenchymal organs (liver, kidneys, spleen) in animals of the experimental group as compared to indicators in animals of the control group.
- the solubility of drugs in the gastrointestinal biofluids is an important biopharmaceutical property.
- a number of biopharmaceutical characteristics of some of the new compounds obtained were studied, in particular WDS-1 and WDS-5 in comparison with acyclovir. The test was carried out in accordance with the requirements of the regulatory documentation of the European Medical Agency (Guidance on the Investigation of Bioequivalence. European Medicines Agency (EMA). Committee for Medicinal Products of Human Use (CHMP), 2010).
- D / S Dose / Solubility Ratio
- biopharmaceutical solubility is not a constant for a specific drug substance (drug), but depends on the maximum registered dosage of drugs for the immediate release of systemic action.
- dose to solubility ratio was calculated based on the maximum dosage of acyclovir registered for medical use in the Russian Federation in the dosage form - tablets (800 mg).
- bio-relevant media are solubility media that are as close as possible to the internal fluids of the human body (intestinal, gastric juice) in chemical composition and in physicochemical properties (pH, osmolality, buffer capacity, surface tension). Modeling of physiological conditions is achieved by using surfactants — lecithin and sodium taurocholate as part of these media.
- biorelevant media fasting artificial intestinal juice (FaSSIF)) and after meals (Fed State Simulated Intestinal Fluid (FeSSIF)).
- the criterion for assessing the absorption of a dissolved substance through the membrane of the small intestine of a substance is permeability - the fraction of a substance that has penetrated through the intestinal wall.
- the physicochemical property of a molecule that makes the greatest contribution to its permeability is lipophilicity.
- the measure of lipophilicity used in the indirect assessment of intestinal permeability is the partition coefficient of octanol-water (partition coefficient) - the logarithm of the ratio of concentrations of non-ionized substance in the system of two immiscible liquids - n-octanol and water (log P).
- the biopharmaceutical solubility of the germanium complex compounds obtained according to the invention can be characterized as “high” in the entire physiological pH range corresponding to the pH values in the stomach, duodenum, or initial small intestine.
- the solubility value is not only quantitatively, but also qualitatively different from the solubility of acyclovir. So the solubility of the complex compounds according to the invention is not less than 10 times higher than that of acyclovir, in addition, the solubility of the germanium complex compounds of the invention is “high” in the entire pH range studied, while the solubility of acyclovir at pH 4.4-4.5 and 6.8 is “low”.
- the bio-relevant solubility of the germanium complex compounds of the invention in both FaSSIF and FeSSIF bio-relevant media is “high”, with more than 10 maximum dosages of the substance being dissolved in 250 ml. Since the solubility in both biorelevant media is high, the food intake process will not be limiting when the substance is dissolved in the gastrointestinal tract, and other factors should be taken into account when optimizing the dosage regimen (for example, is there an irritant effect on the gastrointestinal wall, destruction of the compound when eating and etc.).
- the distribution coefficient log P of the investigated germanium complex compounds according to the invention is lower than that of metoprolol and is comparable in magnitude with the distribution coefficient log P for acyclovir.
- the intestinal permeability of these compounds can be characterized as “low”.
- the bioavailability of the germanium complex compounds of the invention will be higher than the bioavailability of acyclovir.
- the process of absorption through the intestinal wall will be the limiting stage in which the compounds of the invention enter the systemic circulation.
- the complex compounds of the invention have significantly greater bio-relevant and biopharmaceutical solubility, which may indicate their higher bioavailability.
- the antiviral activity of the new germanium compounds of the invention was studied in vitro on green monkey kidney cell cultures (VERO) in accordance with generally accepted methods (Guskova TA., Nikolaeva I.S., Peter V .V. Guidelines for the study of the antiviral activity of pharmacological substances / UR Manual of experimental (preclinical) study of new pharmacological substances. - M. - Ministry of Health of the Russian Federation. CJSC IIA Remedium. - 2000. - S.274-280.
- HSV herpes simplex virus
- the criteria for evaluating antiviral activity were: the ability to prevent the development of virus-induced cytopathic effects and inhibit the reproduction of viruses in cell culture.
- the studied samples were introduced in the composition of the nutrient medium 1 hour after infection of the cell culture with a certain dose of the virus (therapeutic regimen). Evaluation of the antiviral activity of the samples and virus-induced cytopathic action in cell culture was carried out daily by light microscopy according to the degree of change in the morphology of the cell monolayer. The results were taken into account on the 4th day after the cells contacted with infectious material, after the appearance of a pronounced (100%) cytopathic effect in the control samples (positive control).
- Virus titer was determined by Reed and Mench (Reed, LJ; Muench, N. (1938). "A simple method of estimating fifty percent endpoints.” The American Journal of Hygiene 27: 493- 497).
- the compound having considered low antiviral activity while the difference equal to 1.5 - 2.0 lg TCD 50 the compound was considered to have moderate antiviral activity, with a difference of> 2.0 lg TCD 50 the compound had a pronounced inhibitory activity against HSV.
- an acyclovir sample in the concentration range from 500 to 100 ⁇ g / ml significantly reduced the infectious activity of the virus by a value in the range from 2.0 lg to 1.0 lg.
- a sample of the complex compound according to the invention WDS-5 in a concentration range equivalent to acyclovir from 400 to 160 ⁇ g / ml, significantly reduced the infectious activity of HSV-1 virus "L2 / R" in the range of 1.75-1.0 log tyd 50 .
- HSV-infected rabbits started 48 hours after infection and were administered per os 6 times a day at a concentration of 10 mg / ml daily for 8 days.
- WDS-1 showed a pronounced positive therapeutic effect and led to a statistically significant decrease in the severity of the clinical picture of ophthalmic herpes, a decrease in the duration of the disease, and prevention of complications of herpes virus infection of the eyes with menigoencephalitis compared with similar indicators in the control group.
- FIG. 5 shows the dynamics of the course of ophthalmic herpes in rabbits.
- the therapeutic effect index of compound WDS-1 was 42.9%.
- a decrease in the severity of the inflammatory process was noted, leading to a rapid decrease in the severity of clinical manifestations.
- the drug is most active in the treatment of epithelial keratitis.
- the survival of animals in the experimental group was 100% against the background of good tolerance compared to 66.7% in the control.
- Table 3 The effect of compound WDS-1 on the reproduction of HSV-1 in samples of swabs from the eyes obtained in rabbits with ophthalmic herpes.
- the titers of the virus isolated in animals treated with WDS-1 compounds on the 5th day after infection were significantly lower than the titers of the virus isolated in animals treated with placebo and amounted to 1.25 lg TCD5o / 0. 1 ml and 4.0 lg of SCC / OD ml, respectively.
- High titers of the virus in control animals indicate continued active reproduction of the virus, including in the corneal epithelium.
- the germanium complexes of the invention have a combined antiviral mechanism of action. They not only exhibit an inhibitory effect on herpes viruses, including acyclovir-resistant strains (in particular, HSV-1 "L2 / R"), but also simultaneously stimulate the formation and maintenance of specific humoral immunity for a long period of time.
- the germanium complex compounds of the invention can be used to treat and prevent various infections caused, in particular, by herpes viruses.
- the germanium complexes of the invention can be used as immunostimulating agents. Due to the combined mechanism of action of the compounds according to the invention, drugs based on them should be effective for the treatment and prevention of immunocompromised persons, for example, AIDS patients, as well as cancer patients and organ transplants.
- the resulting compounds are non-toxic and have good biopharmaceutical characteristics, which allows us to develop on their basis a wide range of drugs containing the active compounds of the invention in effective doses of the germanium complex compounds of the invention.
- Medicines according to the invention can be made in the form of various dosage forms: solid (capsules, tablets), liquid (solutions for injection and ingestion, eye drops) and soft (ointments, gels, suppositories), etc., and may contain as additional components pharmaceutically acceptable carriers and other commonly used ingredients.
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EP12876796.9A EP2851368B1 (en) | 2012-05-16 | 2012-11-01 | Complex compounds of germanium, methods for producing same, and drugs |
CA2873390A CA2873390C (en) | 2012-05-16 | 2012-11-01 | Complex compounds of germanium, methods for producing same, and drugs |
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BR112014027919A BR112014027919B1 (pt) | 2012-05-16 | 2012-11-01 | compostos complexos de germânio, métodos de produção dos mesmos e medicamentos. |
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PT2851368T (pt) | 2019-02-11 |
AU2012380376B2 (en) | 2015-10-01 |
DK2851368T3 (en) | 2019-02-25 |
BR112014027919B1 (pt) | 2020-02-04 |
KR101717280B1 (ko) | 2017-03-17 |
AU2012380376A1 (en) | 2014-12-04 |
TR201901561T4 (tr) | 2019-02-21 |
KR20150011386A (ko) | 2015-01-30 |
CA2873390A1 (en) | 2013-11-21 |
CA2873390C (en) | 2017-10-24 |
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