DE102006058450A1 - Preparations for the inhibition of prostaglandin E2 synthesis - Google Patents
Preparations for the inhibition of prostaglandin E2 synthesis Download PDFInfo
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- DE102006058450A1 DE102006058450A1 DE102006058450A DE102006058450A DE102006058450A1 DE 102006058450 A1 DE102006058450 A1 DE 102006058450A1 DE 102006058450 A DE102006058450 A DE 102006058450A DE 102006058450 A DE102006058450 A DE 102006058450A DE 102006058450 A1 DE102006058450 A1 DE 102006058450A1
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- myrtucommulone
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- acylphloroglucinol
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 19
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 230000005764 inhibitory process Effects 0.000 title claims description 11
- XEYBRNLFEZDVAW-ARSRFYASSA-N dinoprostone Chemical compound CCCCC[C@H](O)\C=C\[C@H]1[C@H](O)CC(=O)[C@@H]1C\C=C/CCCC(O)=O XEYBRNLFEZDVAW-ARSRFYASSA-N 0.000 title abstract description 6
- 229960002986 dinoprostone Drugs 0.000 title 1
- XEYBRNLFEZDVAW-UHFFFAOYSA-N prostaglandin E2 Natural products CCCCCC(O)C=CC1C(O)CC(=O)C1CC=CCCCC(O)=O XEYBRNLFEZDVAW-UHFFFAOYSA-N 0.000 title 1
- 229930190978 myrtucommulone Natural products 0.000 claims abstract description 27
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/12—Ketones
-
- 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
- A61K31/12—Ketones
- A61K31/121—Ketones acyclic
-
- 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
- A61K31/12—Ketones
- A61K31/122—Ketones having the oxygen directly attached to a ring, e.g. quinones, vitamin K1, anthralin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
-
- 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
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- Veterinary Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Animal Behavior & Ethology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Pain & Pain Management (AREA)
- Rheumatology (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
Die vorliegende Erfindung betrifft Zubereitungen aus Acylphloroglucinolen, insbesondere Hyperforin und Myrtucommulon und deren Derivaten, die Bereitstellung dieser Zubereitungen für die therapeutische Behandlung von entzündlichen Erkrankungen, schmerzhaften und fiebrigen Zuständen und Krebserkrankungen, die mit einer erhöhten Aktivität der induzierbaren mitochondrialen Prostaglandin E<SUB>2</SUB> Synthase-1 (mPGES-1) bzw. erhöhten Prostaglandin E<SUB>2</SUB> Synthese einhergehen, sowie das dazugehörige Verfahren.The present invention relates to preparations of acylphloroglucinols, in particular hyperforin and myrtucommulone and their derivatives, the provision of these preparations for the therapeutic treatment of inflammatory diseases, painful and febrile conditions and cancers associated with increased activity of inducible mitochondrial prostaglandin E <SUB> 2 < / SUB> synthase-1 (mPGES-1) or elevated prostaglandin E <SUB> 2 </ SUB> synthesis, and the associated method.
Description
Die vorliegende Erfindung betrifft natürliche und synthetische Acylphloroglucinole, insbesondere Hyperforin und Myrtucommulon sowie deren strukturellen Derivate als Hemmstoffe der induzierbaren mitochondrialen Prostaglandin E2 Synthase-1 und deren Anwendung zur Therapie von Prostaglandin E2-vermittelten Erkrankungen.The present invention relates to natural and synthetic acylphloroglucinols, in particular hyperforin and myrtucommulone and their structural derivatives as inhibitors of inducible mitochondrial prostaglandin E 2 synthase-1 and their use for the treatment of prostaglandin E 2 -mediated diseases.
Die
Prostaglandinbiosynthese wird durch die initialen Schritte der Umwandlung
von Arachidonsäure
zu Prostaglandin (PG)H2 durch die Cyclooxygenase
(COX)-1 oder -2 eingeleitet. Gewisse PGs, dazu gehörend das
PGE2, sind Mediatorstoffe bei Entzündungen
(v. a. rheumatoide Arthritis), Schmerz und Fieber, und sind des
Weiteren bei Krebserkrankungen (Lunge, Kolon, Endometrium) beteiligt,
andere PGs dagegen erfüllen
wichtige physiologische Funktionen [1]. Hemmstoffe der COX-1 und
-2 unterbinden damit die Synthese aller PGs und weisen aufgrund
der Hemmung physiologisch wichtiger PGs (wie PGF2α, PGI2, PGD2) und aufgrund
der PGE2 Hemmung in der Magenmucosa beträchtliche
Nebenwirkungen (Magen, Niere, kardiovaskuläres System) auf [2]. Der Biosyntheseweg
der Prostaglandine ist in
Die induzierbare mikrosomale Prostaglandin E2 Synthase-1 (mPGES-1) ist Mitglied der MAPEG Familie und katalysiert die Umwandlung von PGH2 zu PGE2 [3]. Neben der mPGES-1 sind die mPGES-2 und die cytosolische (c) PGES als PGE2 Synthasen bekannt [4]. Interessanterweise ist die mPGES-1 an die Aktivität der COX-2 gekoppelt und die Expression beider Enzyme ist durch entzündungsrelevante Stimuli (Interleukin-1β, Tumornekrosisfaktorα) induzierbar. Die COX-1 dagegen stellt PGH2 als Substrat für die cPGES bereit und beide Enzyme werden konstitutiv exprimiert. Das von der COX-2/mPGES-1 lokal synthetisierte PGE2 weist im Gegensatz zu den physiologisch notwendigen PGs ausgeprägte pathophysiologische Eigenschaften (Entzündung, Schmerz, Fieber, Krebserkrankungen, Angiogenese) auf. Dagegen wird das für die Magenmucosa protektiv wirkende PGE2 von der COX-1/cPGES direkt im Magen produziert.The inducible microsomal prostaglandin E 2 synthase-1 (mPGES-1) is a member of the MAPEG family and catalyzes the conversion of PGH 2 to PGE 2 [3]. Besides mPGES-1, mPGES-2 and cytosolic (c) PGES are known as PGE 2 synthases [4]. Interestingly, mPGES-1 is coupled to COX-2 activity and expression of both enzymes is inducible by inflammation-relevant stimuli (interleukin-1β, tumor necrosis factorα). In contrast, COX-1 provides PGH 2 as a substrate for cPGES and both enzymes are constitutively expressed. In contrast to the physiologically necessary PGs, PGE 2 , which is locally synthesized by COX-2 / mPGES-1, has pronounced pathophysiological properties (inflammation, pain, fever, cancers, angiogenesis). In contrast, PGE 2 , which is protective for gastric mucosa, is produced by COX-1 / cPGES directly in the stomach.
Seit Entdeckung der mPGES-1 im Jahre 1999 ist man bestrebt, potente und selektive Hemmstoffe gegen die mPGES-1 zu entwickeln, um die PGE2 Synthese bei entzündlichen Vorgängen selektiv zu inhibieren, ohne dabei die Bildung der physiologisch wichtigen PGs und des im Magen protektiv wirkenden PGE2 zu unterdrücken. Weiterhin konnte im Gegensatz zu selektiven COX-2 Inhibitoren (sog. Coxibe wie z. B. Rofecoxib oder Celecoxib) die Suppression des vasodilatorischen PGI2 durch selektiven pharmakologischen Angriff an der mPGES-1 vermieden werden. Dies macht die mPGES-1 zu einem hochinteressanten Arzneistoff-Target, v. a. bei entzündlichen Erkrankungen (z. B. rheumatoide Arthritis), die mit Schmerz oder Fieber einhergehen, aber auch bei diversen Krebserkrankungen. Allerdings ist bislang kein Inhibitor der mPGES-1 als Arzneimittel zur Therapie zugelassen. Die Anzahl verfügbarer Hemmstoffe (wie z. B. MK-886) ist noch äußerst gering, die derzeit noch am Anfang der klinischen Prüfung stehen. Die Motivation der pharmazeutischen Forschung sichere und selektive Hemmstoffe der mPGES-1 zu finden ist enorm.Since the discovery of mPGES-1 in 1999, efforts have been made to develop potent and selective inhibitors of mPGES-1 in order to selectively inhibit PGE 2 synthesis in inflammatory processes, without inhibiting the formation of the physiologically important PGs and of the gastric to suppress acting PGE 2 . Furthermore, in contrast to selective COX-2 inhibitors (so-called coxibs such as rofecoxib or celecoxib), the suppression of vasodilatory PGI 2 could be avoided by selective pharmacological attack on mPGES-1. This makes the mPGES-1 a highly interesting drug target, especially in inflammatory diseases (eg rheumatoid arthritis), which are associated with pain or fever, but also in various cancers. However, so far no inhibitor of mPGES-1 is approved as a drug for therapy. The number of available inhibitors (such as MK-886) is still extremely low, which is still at the beginning of the clinical trial. The motivation of pharmaceutical research to find safe and selective inhibitors of mPGES-1 is enormous.
Die Aufgabe der vorliegenden Erfindung ist es daher, die Nachteile der bekannten Verfahren (Einsatz von Hemmstoffen der COX Enzyme) zu umgehen, und Wirkstoffe, insbesondere Naturstoffe, und pharmazeutische Zubereitungen zu identifizieren, die in der Lage sind, die mPGES-1 selektiv zu hemmen. Diese Wirkstoffe sollen zur therapeutischen Behandlung von PGE2-vermittelten Erkrankungen, insbesondere rheumatoide Arthritis, bereitgestellt werden, um bei einer hohen Effizienz geringe Nebenwirkungen aufzuweisen.The object of the present invention is therefore to circumvent the disadvantages of the known processes (use of inhibitors of COX enzymes), and to identify active substances, in particular natural substances, and pharmaceutical preparations which are able to selectively inhibit mPGES-1 , These agents are to be provided for the therapeutic treatment of PGE 2 -mediated diseases, especially rheumatoid arthritis, to have low side effects at a high efficiency.
Diese Aufgabe wird durch den Einsatz von Acylphloroglucinolen, insbesondere Hyperforin und Myrtucommulon sowie deren struktureller Derivaten gelöst, wie es im Anspruch 1 beschrieben ist. Bevorzugte Ausführungen sowie das Verfahren zur therapeutischen Behandlung sind in den abhängigen Ansprüchen 2 bis 10 genannt.These Task is by the use of Acylphloroglucinolen, in particular Hyperforin and myrtucommulone as well as their structural derivatives are solved, such as it is described in claim 1. Preferred embodiments and the method of therapeutic treatment are defined in the dependent claims 2 to 10 called.
Hyperforin ist ein natürlich vorkommendes, prenyliertes Acylphloroglucinol aus dem Johanniskraut (Hypericum perforatum L.) [5]. In geläufigen, kommerziell in Apotheken oder Drogerien erhältlichen Johanniskrautextrakten ist Hyperforin bis zu 4% enthalten. Johanniskrautextrakte kommen hauptsächlich zur Anwendung um leichte bis mittelstarke Depressionen zu lindem [6]. Hyperforin gilt hierbei als wirksamkeitsbestimmender Inhaltsstoff und führte in zahlreichen zellulären und tierexperimentellen Untersuchungen zur Erhöhung der Konzentration verschiedener Neurotransmitter im zentralen Nervensystem [7]. Der genaue Wirkmechanismus ist unbekannt. Daneben wurden für Hyperforin apoptotische Eigenschaften beschrieben, die besonders gegenüber Krebszellen ausgeprägt zu sein scheinen [8]. Auch zur Behandlung von atopischer Dermatitis wurde Hyperforin getestet [9]. Als molekulare Targets für Hyperforin wurden der Pregnan-X-Rezeptor, die 5-Lipoxygenase und die Cyclooxygenase-1 beschrieben [10]. In der Literatur sind Untersuchungen von Effekten des Hyperforins auf die Biosynthese des PGE2 nicht bekannt.Hyperforin is a naturally occurring, prenylated acylphloroglucinol from St. John's Wort (Hypericum perforatum L.) [5]. In common St. John's wort extracts commercially available in pharmacies or drug stores, hyperforin is up to 4%. St. John's wort extracts are mainly used to treat mild to moderate depression [6]. Hyperforin is regarded as an efficacy-determining ingredient and led in numerous cellular and animal studies to increase the concentration of various neurotransmitters in the central nervous system [7]. The exact mechanism of action is unknown. In addition, hyperforin has been reported to have apoptotic properties that appear to be particularly pronounced against cancer cells [8]. Hyperforin has also been used to treat atopic dermatitis [9]. As molecular targets for hyperforin the pregnane X receptor, 5-lipoxygenase and cyclooxygenase-1 have been described [10]. In the literature, studies of effects of hyperforin on the biosynthesis of PGE 2 are unknown.
Myrtucommulon
ist ein nicht-prenyliertes Acylphoroglucinoiderivat, das bislang
nur in den Blättern
(0,12% in getrockneten Blättern)
der Myrte (Myrtus communis L.) nachgewiesen wurde. Myrte wird seit
Jahrtausenden als Gewürz
und zur Herstellung von Likören
verwendet. Für
Myrte bzw. deren charakteristische Inhaltstoffe wurden bisher nur
wenige pharmakologische Wirkungen nachgewiesen. Dazu gehören anti-hyperglykämische [11-13],
antibakterielle [14, 15] und analgetische Effekte [16]. Darüber hinaus
wurden schwache antioxidative Wirkungen beobachtet [17-19]. Es wurde
außerdem
kürzlich
gezeigt, dass Myrtucommulon proinflammatorische Eigenschaften von
Leukozyten suprimiert [20]. So hemmt Myrtucommulon die COX-1 moderat
(IC50 = 17 μM), die Aktivität der COX-2
wird dagegen nicht inhibiert. Effekte auf die Biosynthese des PGE2 durch Präparationen der Myrte oder deren
charakteristischen Inhaltsstoffen (insbesondere Myrtucommulon) sind
nicht bekannt. Ebenso sind toxische oder unerwünschte Wirkungen an Menschen
durch Applikation von Myrte-Zubereitungen nicht oder kaum beobachtet
worden. Die Strukturformeln von Acylphloroglucinolen Myrtucommulon
und Hyperforin sowie von zwei weiteren Substanzen Semi-Myrtucommulon und
Isobutyrophenon-Kern sind in
In
der vorliegenden Erfindung konnte zum ersten Mal gezeigt werden,
dass Hyperforin aus Johanniskraut, natürliches Myrtucommulon aus den Blättern der
Myrte und vollsynthetisches Myrtucommulon die katalytische Aktivität der humanen
mPGES-1 (Umwandlung von PGH2 zu PGE2) hemmen (
In einer Ausführung der Erfindung werden Extrakte aus den ganzen Myrtenpflanzen oder Teilen davon verwendet, wobei insbesondere frische oder getrocknete Blätter der Myrte geeignet sind, welche die höchste Konzentration der Substanz Myrtucommulon enthalten. Daneben werden Extrakte aus den Blüten des Johanniskrauts verwendet. Besonders bevorzugt sind dabei jeweils lipophile Extrakte, z. B. auf der Basis von Chloroform, Aceton o. ä., weil sie im Vergleich zu nicht-lipophilen Extrakten (z. B. zu Extrakten in Wasser oder Ethanol) wesentlich mehr Myrtucommulon bzw. Hyperforin enthalten.In an execution extracts of the whole myrtle plants or Parts thereof used, in particular fresh or dried leaves the myrtle are suitable, which is the highest concentration of the substance Myrtucommulone included. In addition, extracts of the flowers of Johanniskraut used. Particular preference is given in each case lipophilic extracts, e.g. B. based on chloroform, acetone o. Ä., Because in comparison to non-lipophilic extracts (for example to extracts in water or ethanol) significantly more myrtucommulone or hyperforin contain.
In einer weiteren Ausführung der Erfindung wird natürliches Hyperforin aus den Blüten des Johanniskraut, natürliches Myrtucommulon aus den Blättern der Myrte, als auch vollsynthetisches Myrtucommulon verwendet. In einer bevorzugten Ausführung der Erfindung wird vollsynthetisches Myrtucommulon verwendet. Dieses kann z. B. nach einem Verfahren von Jauch et al. (nicht publiziert) gewonnen werden.In another embodiment the invention becomes natural Hyperforin from the flowers St. John's wort, natural Myrtucommulone from the leaves myrtle, as well as fully synthetic myrtucommulone. In a preferred embodiment The invention uses fully synthetic myrtucommulone. This can z. By a method of Jauch et al. (not published) be won.
In einer weiteren Ausführung werden strukturelle Derivate des Myrtucommulons oder des Hyperforins verwendet, die eine vergleichbare oder bessere Hemmwirkung auf die mPGES-Aktivität haben.In another embodiment become structural derivatives of myrtucommulone or hyperforin used, which has a comparable or better inhibitory effect on the mPGES activity to have.
Die Erfindung umfasst ferner eine pharmazeutische Zusammensetzung, die mindestens einen Wirkstoff aus Johanniskraut, Myrte oder/und eines seiner Derivate und gegebenenfalls ein pharmazeutisches Trägermaterial enthält.The The invention further encompasses a pharmaceutical composition which at least one active substance of St. John's wort, myrtle or / and one of its Derivatives and optionally a pharmaceutical carrier material contains.
Die Erfindung umfasst ferner eine pharmazeutische Zusammensetzung, die mindestens ein anderes Acylphloroglucinol und gegebenenfalls ein pharmazeutisches Trägermaterial enthält.The The invention further encompasses a pharmaceutical composition which at least one other acylphloroglucinol and optionally a pharmaceutical support material contains.
Zur therapeutischen Behandlung von PGE2-vermittelten Erkrankungen sind Plasmakonzentrationen von ca. 3 μM Myrtucommulon oder Hyperforin erstrebenswert, das könnte etwa die p. o. Gabe von etwa 500-1000 mg/Tag sein.For the therapeutic treatment of PGE 2 -mediated diseases, plasma concentrations of about 3 μM myrtucommulone or hyperforin are desirable, which could be about the po dose of about 500-1000 mg / day.
Die Verabreichung von Acylphloroglucinolen wie Hyperforin oder Myrtucommulon und deren Derivaten oder diese enthaltenden pharmazeutischen Zusammensetzungen zur Therapie von Erkrankungen kann oral oder parenteral erfolgen.The Administration of acylphloroglucinols such as hyperforin or myrtucommulone and their derivatives or pharmaceutical compositions containing them for the treatment of diseases can be done orally or parenterally.
Der Vorteil der vorliegenden Erfindung liegt darin, dass für das Arzneistofftarget mPGES-1 mit Acylphloroglucinolen Grundstrukturen identifiziert wurden, die zur Hemmung der Aktivität der mPGES-1 führen. Damit könnte nun selektiv die Synthese des PGE2 durch COX-2/mPGES-1 gehemmt werden, ohne dabei, wie bislang mittels Inhibitoren der COX-1 und -2, auch die Synthese anderer (physiologisch wichtiger) PGs zu hemmen. Dies hat zur Folge, dass die Therapie PGE2-vermittelter Erkrankungen mittels Acylphloroglucinolen im Vergleich zu COX-1/2 Inhibitoren weniger Nebenwirkungen aufweisen dürfte. Des Weiteren kann durch Verwendung von Acylphloroglucinolen der Einsatz bzw. die Dosis von nicht-steroidalen Antiphlogistika (COX Inhibitoren) reduziert und die Dauer der Einnahme verkürzt werden, die wegen ihrer unspezifischen Blockade der Synthese aller PGs zu erheblichen Nebenwirkungen führen.The advantage of the present invention is that for the drug target mPGES-1 with acylphloroglucinols basic structures have been identified which lead to the inhibition of the activity of mPGES-1. Thus, the synthesis of PGE 2 could be selectively inhibited by COX-2 / mPGES-1, without inhibiting the synthesis of other (physiologically important) PGs, as hitherto by inhibitors of COX-1 and -2. As a result, the therapy of PGE 2 -mediated diseases by means of acylphloroglucinols should have fewer side effects compared to COX-1/2 inhibitors. Furthermore, by using acylphloroglucinols, the use or the dose of non-steroidal anti-inflammatory drugs (COX inhibitors) can be reduced and the duration of administration can be shortened, which leads to considerable side effects because of their unspecific blockade of the synthesis of all PGs.
Die Erfindung kann genutzt werden, um alle Formen von Erkrankungen, die mit einer erhöhten Produktion von PGE2 einhergehen, zu behandeln. Dabei handelt es sich primär um entzündliche Erkrankungen (v. a. rheumatoide Arthritis), fiebrige und schmerzhafte Zustände, sowie Krebserkrankungen, bei denen PGE2 eine Rolle spielt.The invention can be used to treat all forms of diseases associated with increased production of PGE 2 . These are primarily inflammatory diseases (especially rheumatoid arthritis), feverish and painful conditions, as well as cancers in which PGE 2 plays a role.
Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der Erfindung werden nachstehend anhand der Ausführungsbeispiele mit Bezug auf die Zeichnungen beschrieben. Die Zeichnungen zeigen:Further Advantages, features and applications of the invention will be below with reference to the embodiments described with reference to the drawings. The drawings show:
Ausführungsbeispieleembodiments
Einfluss von Acylphloroglucinolen auf die Aktivität der mPGES-1Influence of Acylphloroglucinolen on the activity the mPGES-1
A549 Zellen wurden mit Interleukin-1β (1 ng/ml) für 72 Stunden inkubiert. Nach Ernte und Zellzahlbestimmung wurden die pelletierten Zellen auf Trockeneis/Ethanol schockgefroren, durch Zugabe von 1 ml Homogenisierungspuffer (4°C) wieder aufgetaut und mittels Ultraschall homogenisiert. Nach Zentrifugation (10.000 g für 10 min bei 4°C) wurde der erhaltene Überstand bei 174.000 g und 4°C für 1 h Stunde zentrifugiert um Mikrosomen zu gewinnen. Das Pellet (Mikrosomen) wurde im Homogensierungspuffer gelöst und mit den Testsubstanzen (Hyperforin, Myrtucommulon und Derivate bzw. DMSO) für 10 min bei 4°C in 96-well Platten vorinkubiert. Dann wurde PGH2 als Substrat zugegeben und die Reaktion nach 1 min bei 4°C mittels Stopplösung (enthält u. a. Fe2+, Citronensäure und 11-β-PGE2 als Standard) beendet. Ein Ansatz wird bereits vor Reaktionsbeginn mit der Stopplösung versetzt um den Gehalt an PGE2 in der PGH2-Lösung zu ermitteln. Nach Festphasenextraktion (RP-18-Säulen und Acetonitril als Elutionsmittel) wurde die Probe mittels HPLC (RP-18, UV-Detektion bei 190 nm) analysiert.A549 cells were incubated with interleukin-1β (1 ng / ml) for 72 hours. After harvesting and cell count determination, the pelleted cells were flash-frozen on dry ice / ethanol, thawed again by adding 1 ml of homogenization buffer (4 ° C.) and homogenized by means of ultrasound. After centrifugation (10,000 g for 10 min at 4 ° C), the resulting supernatant was centrifuged at 174,000 g and 4 ° C for 1 h to obtain microsomes. The pellet (microsomes) was dissolved in Homogensierungspuffer and preincubated with the test substances (hyperforin, myrtucommulone and derivatives or DMSO) for 10 min at 4 ° C in 96-well plates. Then PGH 2 was added as a substrate and the reaction after 1 min at 4 ° C by means of stop solution (contains, inter alia, Fe 2+ , citric acid and 11-β-PGE 2 as standard) ended. An approach is added before the start of the reaction with the stop solution to determine the content of PGE 2 in the PGH 2 solution. After solid phase extraction (RP-18 columns and acetonitrile as eluent), the sample was analyzed by HPLC (RP-18, UV detection at 190 nm).
Es
zeigt sich, dass die Vorinkubation der mikrosomalen Fraktion von
Interleukin-1β-stimulierten A549
Zellen zu einer potenten Hemmung der mPGES-1 Aktivität führt, indem
3 μM Myrtucommulon die
PGE2-Synthese aus PGH2 zu
ca. 74% hemmt, der IC50-Wert liegt bei ca.
1 μM (
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| DE19854446A1 (en) * | 1998-11-25 | 2000-06-08 | Univ Ludwigs Albert | Use of hyperforin for treating cancer, or in topical compositions optionally together with hypericin for treating e.g. inflammatory skin disease, skin aging or bacterial skin infections |
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| EP1131063B1 (en) * | 1998-11-25 | 2003-04-23 | Universitätsklinikum Freiburg | Hyperforin ointment or cream |
| AU2003222316A1 (en) * | 2002-05-07 | 2003-11-11 | Universitatsklinikum Freiburg | Use of hyperforin and derivatives thereof for inhibiting angiogenesis |
| DE102006021154A1 (en) * | 2006-05-06 | 2007-11-08 | Eberhard-Karls-Universität Tübingen | Preparations of myrtle, their ingredients and / or their derivatives for the treatment of cancer |
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2006
- 2006-12-12 DE DE102006058450A patent/DE102006058450A1/en not_active Ceased
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2007
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| DE69901309T2 (en) * | 1998-09-17 | 2002-12-05 | Fabre Pierre Dermo Cosmetique | MYRTE EXTRACT, METHOD FOR THE PRODUCTION AND USE |
| DE19854446A1 (en) * | 1998-11-25 | 2000-06-08 | Univ Ludwigs Albert | Use of hyperforin for treating cancer, or in topical compositions optionally together with hypericin for treating e.g. inflammatory skin disease, skin aging or bacterial skin infections |
| DE19913333C2 (en) * | 1999-03-24 | 2001-10-11 | Univ Ludwigs Albert | Hyperforin as a cytostatic |
| EP1345614B1 (en) * | 2000-12-22 | 2004-08-11 | Dr. Willmar Schwabe GmbH & Co. KG | Improved and stable extract from hypericum perforatum l. , method for the production thereof and its use as a topical medicament |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008044993A1 (en) * | 2008-08-29 | 2010-03-18 | Universität des Saarlandes | Synthesis of myrtucommulone A and myrtucommulone analogues |
| DE102008044993B4 (en) * | 2008-08-29 | 2011-01-27 | Universität des Saarlandes | Synthesis of myrtucommulone A and myrtucommulone analogues |
| WO2018202787A1 (en) | 2017-05-03 | 2018-11-08 | Bertholdt Guenther | Foodstuff to produce positive health effects |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008071173A1 (en) | 2008-06-19 |
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