Metabolism and excretion of novel pulmonary-targeting docetaxel liposome in rabbits
The Korean Journal of Physiology and Pharmacology
;
: 45-54, 2017.
Article
in English
| WPRIM
| ID: wpr-728258
ABSTRACT
Our study aims to determine the metabolism and excretion of novel pulmonary-targeting docetaxel liposome (DTX-LP) using the in vitro and in vivo animal experimental models. The metabolism and excretion of DTX-LP and intravenous DTX (DTX-IN) in New Zealand rabbits were determined with ultraperformance liquid chromatography tandem mass spectrometry. We found DTX-LP and DTX-IN were similarly degraded in vitro by liver homogenates and microsomes, but not metabolized by lung homogenates. Ultra-performance liquid chromatography tandem mass spectrometry identified two shared DTX metabolites. The unconfirmed metabolite M(un) differed structurally from all DTX metabolites identified to date. DTX-LP likewise had a similar in vivo metabolism to DTX-IN. Conversely, DTX-LP showed significantly diminished excretion in rabbit feces or urine, approximately halving the cumulative excretion rates compared to DTX-IN. Liposomal delivery of DTX did not alter the in vitro or in vivo drug metabolism. Delayed excretion of pulmonary-targeting DTX-LP may greatly enhance the therapeutic efficacy and reduce the systemic toxicity in the chemotherapy of non-small cell lung cancer. The identification of M(un) may further suggest an alternative species-specific metabolic pathway.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Mass Spectrometry
/
In Vitro Techniques
/
Chromatography, Liquid
/
Carcinoma, Non-Small-Cell Lung
/
Models, Animal
/
Animal Experimentation
/
Drug Therapy
/
Tandem Mass Spectrometry
/
Metabolic Networks and Pathways
/
Feces
Limits:
Animals
Language:
English
Journal:
The Korean Journal of Physiology and Pharmacology
Year:
2017
Type:
Article
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