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Enregistrement W7043505219

Sviluppo e validazione di un metodo HPLC per la determinazione della flupirtina nel plasma. Analisi farmacocinetica nei cani e nei gatti.

2014· article· it· W7043505219 sur OpenAlexaboutno aff

Notice bibliographique

RevueElectronic Theses and Dissertations Repository (University of Pisa) · 2014
Typearticle
Langueit
DomaineMaterials Science
ThématiqueX-ray Diffraction in Crystallography
Établissements canadiensnon disponible
Organismes subventionnairesnon disponible
Mots-clésPhysical activityReference valuesHydraulic turbines
DOInon disponible

Résumé

récupéré en direct d'OpenAlex

Riassunto La flupirtina (FLU) è un farmaco analgesico non-oppioide appartenente alla classe del N-metil D-aspartato (NMDA) priva di proprietà antipiretiche e antiflogistiche, utilizzata nel trattamento di una vasta gamma di stati di dolore nell'uomo Lo scopo di questo studio è stato: • Sviluppare e validare un metodo analitico per la determinazione della FLU con HPLC-FL • Determinare il profilo farmacocinetico della FLU nei cani e nei gatti sani dopo differenti vie di somministrazioni e formulazioni Determinazione e validazione del metodo analitico Il metodo analitico descritto è risultato essere accurato e selettivo per la determinazione della FLU attraverso HPLC-FL. È stata utilizzata una fase mobile ACN:AcONH4 (20 mM) pH 6.8 (60:40, v/v) con un flusso di 1 mL/min in condizione isocratica e λ di emissione ed eccitazione rispettivamente di 370 e 323 nm. I tempi di ritenzione per la FLU e IS (trazodone) sono stati rispettivamente 4.6 ± 0.2 e 5.8 ± 0.2 min. La FLU ed il suo IS sono stati inoltre caratterizzati da un recupero rispettivamente del 75% e 67%. La determinazione del metodo è stata validata in accordo con le linee guida internazionali EMA. Il LOQ e LOD sono stati rispettivamente di 10 e 3 ng/mL. L’applicabilità di questo metodo è stata verificata attraverso la determinazione della FLU in plasma canino dopo singolo trattamento orale di Efiret® 5 mg/Kg. Sperimentazione animale Animali: sei cani adulti di razza Labrador e sei gatti adulti di razza mista sono stati utilizzati in due differenti sperimentazioni per valutare il profilo farmacocinetico della FLU. Cani: Una singola dose di farmaco è stata somministrata secondo un disegno a cross over (quadrato latino 4x4) attraverso quattro trattamenti (intravena IV, orale a rilascio immediato POIR, rettale RC 5 mg/kg FLU e orale a rilascio prolungato POPR 200mg/cane) a quattro diversi gruppi. Gatti: Una singola dose di farmaco è stata somministrata secondo un disegno a cross-over (quadrato latino 2X2) a due gruppi di animali utilizzando due diversi trattamenti (IV e PO 5 mg/Kg). Abstract Flupirtine (FLU) is a non-opiod analgesic drug belonging to the class of N-methyl-D-aspartate (NMDA). Its properties are used in the treatment of a wide range of pain states in humans without antipyretic or antiphlogistic effects. According to the literature, there is a substantial body of evidence on the efficacy of FLU in humans but no study has been performed in pets. The aim of this study was: • to determine and validate a bioanalytical method to detect FLU with HPLC-FL • to evaluate the pharmacokinetic profiles of FLU in healthy dogs and cats after different routes and formulations. Determination and validation of a bioanalytical method The analytical method provided a selective and accurate quantization of FLU through a HPLC-FL. The mobile phase consisted of ACN:AcONH4 (20 mM) pH 6.8 (60:40, v/v) at a flow rate of 1 mL/min in isocratic mode. Excitation and emission wavelengths were set at 323 and 370 nm, respectively. The recoveries of FLU and IS (trazodone) were about 75% and 67%. Typical retention times for FLU and IS were 4.6 ± 0.2 and 5.8 ± 0.2 min, respectively. The described method was validated according to international guidelines on the bioanalytical method validation. Limits of quantification and detection were 10 and 3 ng/mL, respectively. The applicability of this method has been verified by determining FLU in canine plasma after single oral treatment with 5 mg/kg of Efiret®. Animal and experimental design Animals: Six healthy Labrador breed adult dogs and six healthy mixed breed adult cats were used in two different experiments to evaluate the pharmacokinetic profiles (PK) of FLU. Study design: Dogs: single-dose, four-group and four-treatment (intravenous IV, oral immediate release POIR, per rectum RC routes 5 mg/kg FLU, oral prolonged release POPR route 200 mg/subject), crossover design (4x4 Latin-square). Cats: single-dose, two-group, two-treatment (IV and PO routes 5 mg/kg), crossover design (2x2 Latin-square). The wash out period was 1-week between trials. Blood samples were collected at assigned times and plasma was then analysed by the validated HPLC method. Some adverse effects were noted only in dogs of the IV group, however they resolved rapidly and spontaneously. In all the other groups, no adverse effects were observed. The FLU plasma concentrations were detectable in all groups up to 36 h following treatment. The bioavailability (F%) values after POIR, POPR and RC in dogs were 41.9, 36.8 and 29.3% respectively, while the PO F% in cats was 39.3 ± 9.7%. The PO F% in both dogs and cats was similar, but about two times smaller than that found in humans (90%). This large differences in F% demonstrated that PK values derived in dogs or in cats should not be extrapolated to humans, and vice versa. Conclusion: This study represents the first step that should pave the way for use of this active ingredient in veterinary field.

Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.

Comment cette classification a été obtenuedéplier

Prédiction distillée sur la base complète

Imitation des enseignants

Ni prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.

score de la tête « metaresearch » (Codex)0,001
score de la tête « metaresearch » (Gemma)0,000
Version: codex-gemma-dda1882f352aStatut de validation: machine_predicted_unvalidated
Catégories candidatesMéta-épidémiologie (sens strict), Études des sciences et des technologies
Catégories consensuellesaucune
DomaineSignal candidat: aucune · Signal consensuel: aucune
Devis d'étudeSignal candidat: Expérimental (laboratoire) · Signal consensuel: aucune
GenreSignal candidat: Empirique · Signal consensuel: Empirique
Score de désaccord entre enseignants0,745
Score d'incertitude au seuil1,000

Scores Codex et Gemma par catégorie

CatégorieCodexGemma
Métarecherche0,0010,000
Méta-épidémiologie (sens strict)0,0000,001
Méta-épidémiologie (sens large)0,0010,000
Bibliométrie0,0000,001
Études des sciences et des technologies0,0010,001
Communication savante0,0000,001
Science ouverte0,0010,000
Intégrité de la recherche0,0000,000
Charge utile insuffisante (le modèle a refusé de juger)0,0010,000

Scores machine (provisoires)

Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.

Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.

Tête enseignante Opus0,006
Tête enseignante GPT0,215
Écart entre enseignants0,210 · la distance entre les deux têtes enseignantes sur ce seul travail
Statut de validationscore_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle

Classification

machine, non validée

Prédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.

Devis d'étudeExpérimental (laboratoire)
Domainenon disponible
GenreEmpirique

Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».

En bref

Citations0
Publié2014
Routes d'admission1
Résumé présentoui

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