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EP2187735A2 - Substances pour la protection de cellules et/ou de tissus - Google Patents

Substances pour la protection de cellules et/ou de tissus

Info

Publication number
EP2187735A2
EP2187735A2 EP08784693A EP08784693A EP2187735A2 EP 2187735 A2 EP2187735 A2 EP 2187735A2 EP 08784693 A EP08784693 A EP 08784693A EP 08784693 A EP08784693 A EP 08784693A EP 2187735 A2 EP2187735 A2 EP 2187735A2
Authority
EP
European Patent Office
Prior art keywords
substance
group
cells
substance according
preparation
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Withdrawn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
EP08784693A
Other languages
German (de)
English (en)
Inventor
Ralf Lösel
Benito Yard
Grietje Beck
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2187735A2 publication Critical patent/EP2187735A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N1/00—Preservation of bodies of humans or animals, or parts thereof
    • A01N1/10—Preservation of living parts
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N1/00—Preservation of bodies of humans or animals, or parts thereof
    • A01N1/10—Preservation of living parts
    • A01N1/12—Chemical aspects of preservation
    • A01N1/122—Preservation or perfusion media
    • A01N1/125—Freeze protecting agents, e.g. cryoprotectants or osmolarity regulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P39/00—General protective or antinoxious agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

  • the invention relates to substances which are suitable for the protection of cells and / or tissue.
  • Mammalian organs and tissues or other eukaryotic cells can be exposed to a variety of damaging influences. Especially the cells of higher organisms are particularly susceptible, especially damage then occurs frequently when cells or tissues are dissolved out of the organism, such as in cell cultures or in transplants. Furthermore, even if the original environment of the cells or organs, e.g. due to surgical intervention or pathological processes.
  • An optimal substance on the one hand sufficiently protects the cells or the tissue against ischemic damage and on the other hand achieves the desired protective effect in low concentration, so that no haemodynamic effects occur, the substance is neither harmful nor environmentally harmful, has not yet been found.
  • the object of the invention was therefore to find a substance which cells and tissues, in vivo but especially during storage and transport, i. ex-vivo, protects, in particular tissue to be transplanted or removed cells from ischemic damage or cold damage preserved or reduced. Furthermore, the substance should be able to be used in low concentration and have no hemodynamic or otherwise undesirable activity.
  • the double circle is an aromatic system having 6 to 18 carbon atoms and carrying at least the substituents R 1 , R 2 and R 3 , wherein R 1 and R 2 are each selected from the group consisting of OH, SH and NH 2 , the may also be in protected form, and R 3 is a hydrophobic group, where log P of the substance is at least 2.5.
  • the aromatic system may be composed of both aromatic rings carrying exclusively carbons as ring atoms and those having heteroatoms as long as they are biocompatible.
  • Carbazoles and derivatives thereof are, for example, aromatic rings containing heteroatoms in the aromatic system; only aromatics containing carbon are preferred.
  • the aromatic system has one or more aromatic rings which may be fused together. Preferred examples are phenyl, naphthalene and anthracene.
  • the aromatic system may carry, in addition to the substituents R 1, R 2 and R 3, further substituents which are inert with respect to the desired properties and may optionally stabilize or activate the system. Apart from R 1, R 2 and R 3, no further substituents are preferably bonded.
  • the aromatic system which carries at least the substituents R 1, R 2 and R 3 is preferably characterized by containing 5-, 6- or 7-membered rings. Rings in a size of 5 to 7 atoms have a high ring stability, so have reduced internal stresses, even at high degree of substitution of the aromatic ring. In addition, such aromatic systems are readily available, well studied and therefore safe, in terms of not harmful or harmful to the environment.
  • aromatic system having 1 to 3 rings.
  • compounds can also be used whose aromatic system contains more rings, it has been found that in particular smaller aromatic systems with only 1 to 3 rings can better penetrate through the cell wall due to their small size.
  • R 1 and R 2 are selected from the group consisting of OH, SH and NH 2 , optionally in protected form, wherein any combination of these radicals may be present.
  • Ri and R 2 are each OH.
  • the groups may be protected with a protecting group to protect them from harmful reactions during storage.
  • the radicals Ri and R 2 are each bound in the aromatic system to an aromatic ring, either in ortho or para position to each other. It is believed that the reducing effect of the two functional groups and thus the protection of the tissue from oxidative damage is enhanced precisely by this selective position of the two substituents Ri and R 2 to one another. It can be assumed that due to the conformation of the aromatic ring at the ortho or para position, the two functional groups, ie the substituents R 1 and R 2 , point in the same direction, and thus their function is synergistically enhanced.
  • the aromatic system is particularly preferably derived from 2,5-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 2,5-dihydroxyphenethylamine or 3,4-dihydroxyphenethylamine.
  • the substance according to the invention can protect cells or tissues from damaging influences only if the substance is formed such that the log P of the substance is at least 2.5, log P is an empirically calculated parameter and can be mathematically calculated from the structure of a substance where P is the partition coefficient of the considered substance between n-octanol and water, so represents a measure of the hydrophobicity of a substance.
  • Small values of the log P mean an increased hydrophilicity of the molecule, while large values mean increased lipophilicity.
  • a molecule with a log P of at least 2.5 has such a good lipophilicity or hydrophobicity that the molecule can migrate better through the cell wall into cells than conventional substances with a lower log P in order to protect it unfold.
  • highly hydrophilic molecules with a log P of less than 2.5 do not pass through the semipermeable cell wall, so that their effect is reduced.
  • a threshold appears to be reached which refers to substances that are capable of penetrating the cells of a tissue to prevent ischemic damage to the tissue by reducing or preventing oxidative factors.
  • the preparation according to the invention has, in addition to the two reducing substituents R 1 and R 2 , another substituent R 3 .
  • This serves to set the application properties of the substance targeted and is varied in particular to adjust the log P value accordingly.
  • the constitution of R 3 is not limited as long as it is biocompatible and contributes to hydrophobicity.
  • R 3 can be both a homoalkyl radical, as well as a heteroalkyl radical, straight-chain or branched.
  • R 3 includes substituted, such as unsubstituted, homoatomic or heteroatomic "radicals" in the chemical sense
  • the substituent R 3 is an alkyl substituent having a chain length of C6 to C26 and preferably C 8 to C 18.
  • R is 3 preferably represents a saturated alkyl radical consisting of carbon atoms which may be linear or branched and comprises 6 to 26 and preferably 8 to 18 carbon atoms Among the alkyl radicals, preference is given to linear versus branched alkyl chains It is believed that such alkyl substituents have a carbon chain of 6 to 26 carbon atoms on the aromatic ring which carries the more hydrophilic substituents Ri and R 2 , the hydrophobicity of the aromatic ring significantly raises, so that the penetration of the cells is in turn facilitated, and thus the substance according to the invention, these cells and thus the tissue or the organ, can protect.
  • the hydrophilic, strongly reducing substituents R 1 and R 2 are thus "masked" and the substances are introduced into the cell where they take effect, but this lipophilic-enhancing effect can only occur from a chain length of at least 6 carbon atoms and is the strongest with a hydrocarbon radical of 8 to 18 carbon atoms From a carbon number of more than 26 carbon atoms, the substituent R 3 has too strong a shielding effect, so that the substance can not exert its protective effect in the cell, since the active strongly reducing functional groups R 1 and R 2 sterically hindered.
  • the substituent R 3 may be bonded directly to the aromatic system.
  • the bond is via a bridging member, which may be the chemical moiety Y-NHCO, where Y is either a direct bond between the aromatic system and the NHCO group, or an alkyl group with a carbon chain of C1 to C8 and preferred from C1 to C3.
  • R 3 is then attached to the carbonyl carbon. Together with R 3 , this thus represents an amide.
  • Amides ie substances that have a peptide bond, are common in nature. They are building blocks of the polypeptides, the proteins. It is therefore estimated that substances which have an amide group can in principle immigrate very well into cells.
  • amides which have an alkyl radical having 1 to 8 carbon atoms and preferably 1 to 3 carbon atoms on the nitrogen atom and an alkyl chain having 2, preferably 6 to 26, carbon atoms on the carbonyl carbon are well suited to the permeability of the invention Substance according to the invention to increase through the cell wall into the cell interior, and thus to facilitate the entry into the cell interior, so that the substance can develop their cell-protecting or organ-protective effect in place very well. Thus, for bonds via a bridging member, the alkyl chain of R 3 may be shorter since the chain is extended by the bridging member.
  • alkyl chains on the nitrogen atom would also be suitable, it has been found that especially the short alkyl chains, ie those which comprise a maximum of 3 carbon atoms, are particularly well suited. It is believed that this is related to the steric arrangement on the aromatic ring, or with the electron cloud of the lone pair of electrons on the nitrogen atom, which can cause a shielding effect. The same applies to the alkyl radical which is bonded to the carbonyl carbon. However, here the effect of the steric shielding is no longer so great, because already by the nitrogen, the essential shielding is effected, so that in principle longer carbon chains of up to 26 C-atoms are possible.
  • R 3 is bonded via a group having the structure Y-COO, where Y again represents a direct bond between the aromatic system and the grouping COO, but also a C1 to C8 alkyl group, preferably a C1 to C3 alkyl group can.
  • R 3 ie preferably an alkyl radical having a chain length of C 2 to C 26, is bonded to an oxygen atom and in this embodiment gives an ester grouping.
  • esters and amides also have a similar polarity so that they can be used alternatively or in combination.
  • the peptide bond contributes to a slightly improved acceptance in the cell or tissue compared to the ester.
  • esters are not as stable chemically as peptides and split even with slightly changed pH values in acid and alcohol, whereby the effect of the substance according to the invention is at least partially lost.
  • R 3 is bonded via a group having the structure Y-CH 2 O, where Y in turn represents a direct bond between the aromatic system and the grouping CH 2 O or else a C1 to C8 alkyl group, preferably a C1 to C3 alkyl group can be.
  • R 3, ie preferably an alkyl radical having a chain length of C 2 to C 26, is bonded to the oxygen, which in this embodiment leads to an ether grouping.
  • Ethers with the formula given above can also be used as substituent R 3 .
  • the molecule acquires a proportion of hydrophilicity which, however, is markedly reduced with respect to the esters or amides.
  • At least one of the two substituents Ri or R 2 bears a protective group.
  • Functional group protecting groups are used in chemistry whenever a particular functional group is to be prevented from premature reaction. After cleavage of the protecting group then the reactive functional group is free again and can react as desired.
  • Suitable protective groups are the protective groups customarily used in organic chemistry for OH, SH and NH 2 groups, which are well known to the person skilled in the art. As is well known to those skilled in the art, the protecting groups must sufficiently bind to the functional groups R 1 and R 2 to protect them during storage, but the bond must be designed to redissolve the protecting group in a physiological environment.
  • Suitable protecting groups for OH are acyl groups, preferably the acetyl group or succinyl group or else phosphate groups.
  • the substance according to the invention is accordingly reacted with desired protection of one of the radicals R 1 or R 2 with a suitable acid, such as, for example, acetic acid or phosphoric acid.
  • a suitable acid such as, for example, acetic acid or phosphoric acid.
  • Protecting groups of this type can be split off again very easily, usually even under slightly different conditions inside the cell, for example when the pH is changed.
  • the cleavage of the protecting group recovers the functional, strongly reducing group, ie either OH, SH or NH 2 , which protects it from oxidative damage inside the cell.
  • Particularly suitable are acetyl protecting groups. They are readily available, well known, do not split any harmful substances when the protecting group is removed, and are also
  • succinyl protective groups or phosphate protecting groups are obtained by reaction of the substituent Ri and / or R 2 with succinic acid or phosphoric acid.
  • the succinyl group or phosphate group can easily be cleaved off again under conditions which are present in the interior of a cell, so that the reducing effect of the OH, SH or NH 2 groups reappears.
  • Succinic acid and phosphoric acid, which are recovered after cleavage of the protective group are harmless to the body, which can easily be flushed out again.
  • an aromatic system bearing on a ring at least two substituents R 1 and R 2 selected from OH, SH and NH 2 has a strong reducing action and therefore oxidative damage to cells or tissues as counteracted by ischemic conditions, counteracts.
  • a very low concentration is sufficient, i. a concentration of the substance of about 0.5 to 200 uM, preferably 1 to 100 uM.
  • the substance according to the invention can be administered in a variety of ways. All modes of administration are suitable here, such as parenteral or oral administration, with parenteral administration being preferred. It is essential that the substance enters the bloodstream of the tissue to be protected or the cells to be protected, so that there can be an accumulation of the active substance in sufficient quantity. This is usually achieved by injection or infusion into the bloodstream of the donor.
  • the substance according to the invention is particularly suitable in the form of an injectable preparation for administration to a donor.
  • the preparation consists at least of the substance according to the invention and at least one pharmaceutically acceptable carrier.
  • the carrier may be water in the simplest case.
  • the substance is predissolved in suitable pharmaceutically acceptable solvents such as PEG derivatives or the like and then administered after processing either as a solution or dispersion or in the form of liposomes or micelles.
  • suitable pharmaceutically acceptable solvents such as PEG derivatives or the like
  • surfactants can be used for better processing.
  • the surfactants also used for pharmaceutical products are suitable, for example substances which are marketed under the name "Pluronic".
  • the preparation is suitable for being injected into a donor and can preferably be used as a rinsing solution through which the relevant organ to be transplanted flows so that the substance according to the invention reaches all cells of the organ. An almost complete flush is achieved after about 30 minutes to 2 hours.
  • the preparation preferably contains the substance at 0.5 to 20 ⁇ M, since there is thus a sufficient, effective concentration of the substance according to the invention which protects the cells or the organs.
  • the substance according to the invention described above is used to protect cells or even tissues and organs.
  • the protection relates to damage by oxygen deficiency (ischemic conditions) of the cells / tissue, especially in tissue or cells to be transplanted.
  • the substance according to the invention is used in very low concentration and shows no hemodynamic activity. It is highly compatible with this and prolongs the life of cells or tissue intended for transplantation, in order to reduce or completely prevent damage to the tissue prior to transplantation, thus significantly increasing the chances of successful transplantation ,
  • the active substances are synthesized as described below.
  • the effect of the substances on the cold-induced damage of cells is quantified in a model system.
  • endothelial cells for example cells of the endothelium of the human umbilical vein, are cultivated in culture.
  • the cells are incubated with different concentrations of the test substances for variable periods of time, after which the medium is replaced by fresh medium without test substance. Subsequently, the cells are incubated at 0 ° C. for, for example, 24 hours.
  • the laktatdehydrogenase released is determined in the supernatant of the culture vessels by known methods, the concentration of which is a measure of the cell damage.
  • the effectiveness of each compound is determined by the concentration at which 50% of the release of lactate dehydrogenase is inhibited (EC50).
  • N-octanoic acid 1 gram is dissolved in 10 ml of tetrahydrofuran and 0.90 grams of N-ethyldiisopropylamine are added. While stirring, 0.75 grams (0.658 ml) of ethyl chloroformate is added slowly. After 3 hours, the mixture is mixed with 15 ml of ethyl acetate and 10 ml of water. The organic phase is separated and dried over magnesium sulfate.
  • the combined organic phases are washed successively with 10 ml sat. Saline, 10 ml of 0.5 M sulfuric acid and 10 ml of brine.
  • the organic phase is over Dried magnesium sulfate and the solvent removed in vacuo (rotary evaporator). This gives 1.74 grams (96%) of a very tough, nearly colorless oil.
  • the acid chloride is prepared in a known manner by means of phosphorus trichloride. To this, dissolved in 20 ml of tetrahydrofuran, the stoichiometric amount of N-octylamine is slowly added under a nitrogen atmosphere in an ice bath with vigorous stirring. After completion of the addition, the ice bath is removed and stirred overnight with exclusion of light. The solvent is removed in vacuo, the organic phase washed successively with sodium bicarbonate / sodium sulfite solution, water, dilute phosphoric acid and brine and finally dried over molecular sieves. After removal of the solvent gives 2,5-Dihydroxybenzoylamidooctan as an almost white solid.
  • N-octanoyl-dopamine 0.5 grams is taken up in 9.5 grams of a mixture of 60% (v / v) 1, 2-propylene glycol and 40% (v / v) water and mixed.
  • the result is a clear, durable solution, which is suitable for sterilization according to the recognized pharmaceutical rules for parenteral use in mammals.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Dentistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Medicinal Preparation (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

L'invention concerne des substances qui conviennent à la protection de cellules et/ou de tissus.
EP08784693A 2007-07-30 2008-07-10 Substances pour la protection de cellules et/ou de tissus Withdrawn EP2187735A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007035642A DE102007035642A1 (de) 2007-07-30 2007-07-30 Substanzen zur Protektion von Zellen und Geweben gegen Schädigung durch ungünstige Bedingungen
PCT/EP2008/005651 WO2009015752A2 (fr) 2007-07-30 2008-07-10 Substances pour la protection de cellules et/ou de tissus

Publications (1)

Publication Number Publication Date
EP2187735A2 true EP2187735A2 (fr) 2010-05-26

Family

ID=39816962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08784693A Withdrawn EP2187735A2 (fr) 2007-07-30 2008-07-10 Substances pour la protection de cellules et/ou de tissus

Country Status (11)

Country Link
US (1) US20100129436A1 (fr)
EP (1) EP2187735A2 (fr)
JP (1) JP2010534691A (fr)
KR (1) KR20100094446A (fr)
CN (1) CN101765367A (fr)
AU (1) AU2008281106A1 (fr)
BR (1) BRPI0814337A2 (fr)
CA (1) CA2694265A1 (fr)
DE (1) DE102007035642A1 (fr)
WO (1) WO2009015752A2 (fr)
ZA (1) ZA201000483B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004569C2 (en) * 2010-04-16 2011-10-18 Angteq B V Compounds for prevention of cell injury.
EP2422769A1 (fr) 2010-08-17 2012-02-29 Novaliq GmbH Compositions et procédés pour préservation et acceptation améliorées de greffe d'organe
JP6117789B2 (ja) * 2011-09-06 2017-04-19 ノバリック ゲーエムベーハー 親油性ドーパミン誘導体およびその使用

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WO1998009620A1 (fr) * 1996-09-05 1998-03-12 Research Development Foundation INHIBITION DU FACTEUR DE TRANSCRIPTION NUCLEAIRE NF-λB PAR L'ESTER PHENETHYLIQUE D'ACIDE CAFEIQUE, LES DERIVES DE CET ESTER, LA CAPSAICINE (8-METHYL-N-VANILLYLE-6-NONEAMIDE) ET LA RESINIFERATOXINE

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Also Published As

Publication number Publication date
DE102007035642A1 (de) 2009-02-12
US20100129436A1 (en) 2010-05-27
WO2009015752A2 (fr) 2009-02-05
CA2694265A1 (fr) 2009-02-05
ZA201000483B (en) 2011-03-30
BRPI0814337A2 (pt) 2014-10-14
WO2009015752A3 (fr) 2009-04-16
CN101765367A (zh) 2010-06-30
KR20100094446A (ko) 2010-08-26
AU2008281106A1 (en) 2009-02-05
JP2010534691A (ja) 2010-11-11

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