Development and validation of a UPLC-UV method for the determination of daptomycin in rabbit plasma.
Daptomycin (DPT) is a lipopeptide antibiotic with potent bactericidal activity in vitro against Gram-positive bacteria, which has attracted the attention of the scientific community due to its unique mechanism of action and due to the immediate need for new antibiotics in the era of multidrug resistance. In order to assess its pharmacokinetics in rabbits a new analytical method has been developed and validated using ultra performance liquid chromatography in conjugation with ultraviolet detection for the quantitation of the antibiotic in rabbit plasma, using the internal standard methodology. The separation was achieved employing a C(18) column with gradient elution using 0.1% aq. trifluoroacetic acid and methanol. The total analysis time was 2.5 min. The sample pretreatment employed protein precipitation with acetonitrile-methanol mixture and centrifugation. The method was validated in terms of linearity, precision, accuracy, sensitivity, robustness, short-term and freeze-thaw stability and was applied to the quantification of DPT in plasma samples obtained from rabbits treated with 25 mg kg(-1) DPT.
GAIA Research Center, Bioanalytical Department, The Goulandris Natural History Museum, Kifissia, Greece.
Evagelos
E
Gikas
Fotini N
FN
Bazoti
Panagiotis
P
Fanourgiakis
Efstathia
E
Perivolioti
Andreas
A
Roussidis
Athanasios
A
Skoutelis
Anthony
A
Tsarbopoulos
D000818:Animals; D000900:Anti-Bacterial Agents / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D017576:Daptomycin / Q000097:blood*; D011817:Rabbits; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D000900:Anti-Bacterial Agents; D017576:Daptomycin