Ana Maria Ghelidiu
Einführung:
Es wurde eine Studie durchgeführt, um die Pharmakokinetik von Triclabendazolsulfoxid zu bewerten. Der aktive Metabolit von Triclabendazol ist 6-Chlor-5-(2,3-dichlorphenoxy)-2-methylthio-benzimidazol und um die Bioäquivalenz von zwei oralen Suspensionsformen mit jeweils 50 mg/ml Triclabendazol an 36 gesunden Schafen zu untersuchen. Triclabendazol mit dem Handelsnamen Egaten wird zur Behandlung von Fasziolose und Paragonimiasis eingesetzt. Es ist für beide Erkrankungen sehr wirksam. Es ist ein Mitglied der Benzimidazol-Gruppe der Anthelminthika. Die Benzimidazol-Medikamente haben eine gemeinsame Atomstruktur, wobei Triclabendazol die Ausnahme darstellt, da es einen chlorierten Benzolring, jedoch keine Carbamatgruppe aufweist. Benzimidazole wie Triclabendazol binden bekanntermaßen an Beta-Tubulin und verhindern so die Polymerisation von Mikrotubuli.
Verfahren:
Um die Gesamtbioverfügbarkeit des Testprodukts im Vergleich zum Referenzprodukt zu bestimmen, wurde die Untersuchung als randomisierte Hybriduntersuchung mit Verabreichung einer Einzeldosis unter Fastenbedingungen in jedem der beiden Untersuchungszeiträume geplant. Zur Bestätigung der Triclabendazolsulfoxid-Schafplasmafixierungen wurde eine schnelle, spezifische Hochflüssigkeitschromatographie kombiniert mit Massenspektrometrie (LC-MS/MS)-Technik entwickelt und getestet.
Fluid chromatography–mass spectrometry (LC-MS) is a scientific science strategy that consolidates the physical division capacities of fluid chromatography (or HPLC) with the mass investigation abilities of mass spectrometry (MS). Coupled chromatography - MS frameworks are famous in substance investigation in light of the fact that the individual abilities of every strategy are improved synergistically. While fluid chromatography isolates blends with numerous parts, mass spectrometry gives auxiliary personality of the individual segments with high sub-atomic particularity and discovery affectability. This couple strategy can be utilized to break down biochemical, natural, and inorganic mixes ordinarily found in complex examples of ecological and organic beginning. LC-MS framework contains an interface that productively moves the isolated parts from the LC section into the MS particle source. The interface is essential in light of the fact that the LC and MS gadgets are in a general sense incongruent. The versatile stage in a Liquid Chromatography framework is a pressurized fluid, the MS analyzers generally work under high vacuum. In this way, it is beyond the realm of imagination to straightforwardly siphon the eluate from the LC section into the MS source. In general, the interface is a precisely straightforward piece of the LC-MS framework that moves the greatest measure of analyte, expels a critical bit of the versatile stage utilized in LC and jelly the synthetic personality of the chromatography items (synthetically idle). As a necessity, the interface ought not meddle with the ionizing productivity and vacuum states of the MS framework. These days, most broadly applied LC-MS interfaces depend on barometrical weight ionization (API) systems like electrospray ionization (ESI), environmental weight synthetic ionization (APCI), and climatic weight photograph ionization (APPI).These interfaces opened up during the 1990s following a multi decade long innovative work process.
The interface between a fluid stage method (HPLC) with a consistently streaming eluate, and a gas eliminate strategy conveyed in a vacuum was hard for quite a while. The approach of electrospray ionization changed this. As of now, the most widely recognized LC-MS interfaces are electrospray ionization (ESI), environmental weight synthetic ionization (APCI), and barometrical weight photograph ionization (APPI). These are more up to date MS particle sources that encourage the progress from a high weight condition (HPLC) to high vacuum conditions required at the MS analyser. In spite of the fact that these interfaces are depicted independently, they can likewise be economically accessible as double ESI/APCI, ESI/APPI, or APCI/APPI particle sources. Different testimony and drying methods were utilized previously (e.g., moving belts) yet the most widely recognized of these was the disconnected MALDI affidavit. Another methodology still a work in progress called direct-EI LC-MS interface, couples a nano HPLC framework and an electron ionization prepared mass spectrometer.
LC-MS is generally utilized in the field of bioanalysis and is uncommonly engaged with pharmacokinetic investigations of pharmaceuticals. Pharmacokinetic examines are expected to decide how rapidly a medication will be cleared from the body organs and the hepatic blood stream. MS analyzers are valuable in these examinations on account of their shorter investigation time, and higher affectability and particularity contrasted with UV identifiers generally joined to HPLC frameworks. One significant favorable position is the utilization of couple MS-MS, where the indicator might be modified to choose certain particles to section. The deliberate amount is the aggregate of atom sections picked by the administrator. For whatever length of time that there are no obstructions or particle concealment, the LC partition can be very brisk. LC-MS is much of the time utilized in tranquilize advancement since it permits speedy atomic weight affirmation and structure recognizable proof. These highlights accelerate the way toward creating, testing, and approving a disclosure beginning from an immense range of items with potential application. LC-MS applications for medicate advancement are profoundly mechanized techniques utilized for peptide mapping, glycoprotein mapping, lipodomics, normal items dereplication, bioaffinity screening, in vivo sedate screening, metabolic soundness screening, metabolite distinguishing proof, pollution recognizable proof, quantitative bioanalysis, and quality control.
The deliberate plasma groupings of triclabendazole sulfoxide were utilized for the assurance of bioequivalence between the test item concerning the reference item. Non compartmental examination of the pharmacokinetic information of triclabendazole sulphoxide demonstrated likeness between first-request energy of the test and reference item.
Results and Discussion:
Die relevanten pharmakokinetischen Parameter wie Cmax, AUClast und AUCtot wurden bestimmt. Die Mittelwerte für Cmax betrugen 56,0 (17,1) µg/ml für das Testprodukt und 54,4 (20,1) µg/ml für das Referenzprodukt. Die Mittelwerte für AUClast betrugen 1655,6 (443,9) µg/ml xh für das Testprodukt und 1803,3 (750,6) µg/ml xh für das Referenzprodukt. Die Mittelwerte für AUCtot betrugen 1702,4 (445,9) µg/ml xh für das Testprodukt und 1847,7 (755,6) µg/ml xh für das Referenzprodukt. Das mittlere Bioäquivalenzverhältnis von Test zu Referenz für Cmax und AUClast beträgt 1,05119 bzw. 0,969058. Die 90%-Konfidenzintervalle für das Verhältnis der Mittelwerte von Triclabendazolsulfoxid-Test zu Referenz betragen 98,28–112,44 % bzw. 87,97–106,75 % für Cmax und AUClast, was innerhalb des herkömmlichen Bioäquivalenzbereichs von 80–125 % liegt. Der Unterschied zwischen den Mittelwerten ist für Tmax der Test- und Referenzprodukte nicht statistisch signifikant (Friedman- und Kruskal-Wallis-Test).
Abschluss:
Daher wurde angenommen, dass der Testgegenstand hinsichtlich der Geschwindigkeit und des Ausmaßes der Pharmakokinetik von Triclabendazolsulfoxid mit dem Referenzgegenstand bioäquivalent ist.