TY - JOUR
T1 - Pharmacokinetics of gentamicin C1, C1a and C 2 in horses after single intravenous dose
AU - Steinman, A.
AU - Isoherranen, N.
AU - Ashoach, O.
AU - Soback, S.
PY - 2002/9
Y1 - 2002/9
N2 - Gentamicin pharmacokinetics has not been studied in horses. Pharmacokinetics of gentamicin C1, C1a and C2 components following i.v. administration of total gentamicin at 6.6 mg/kg bwt to 6 healthy mature horses was determined. Significant differences in clearance, half-life (t1/2), and mean residence time (MRT) between the gentamicin C1a and the 2 other components were found. The total body clearance (CL) of gentamicin C1a was 1.62 ± 0.50 ml/min x kg and similar to the glomerular filtration rate (GFR) reported for horses. The CL of gentamicin C1 and C2 were 1.03 ± 0.08 ml/min x kg and 1.10 ± 0.15 ml/min x kg, respectively, and significantly slower than that of gentamicin C1a. The values of apparent volume of distribution at steady state were 0.22 ± 0.05, 0.26 ± 0.12 and 0.23 ± 0.05 l/kg for gentamicin C1, C1a and C 2, respectively. The MRT values were mean ± s.d. 3.6 ± 0.5, 2.7 ± 0.3 and 3.5 ± 0.4 h and the t1/2 values were 3.1 (2.5-4.0), 2.4 (2.0-3.2) and 3.3 (2.4-4.3) h (harmonic mean and range) for gentamicin C1, C1a and C2, respectively. The MRT and t1/2 values for gentamicin C1a were significantly shorter than those of gentamicin C1 and C2. It was concluded that the difference in pharmacokinetics between the gentamicin components has potential pharmacological and toxicological implications.
AB - Gentamicin pharmacokinetics has not been studied in horses. Pharmacokinetics of gentamicin C1, C1a and C2 components following i.v. administration of total gentamicin at 6.6 mg/kg bwt to 6 healthy mature horses was determined. Significant differences in clearance, half-life (t1/2), and mean residence time (MRT) between the gentamicin C1a and the 2 other components were found. The total body clearance (CL) of gentamicin C1a was 1.62 ± 0.50 ml/min x kg and similar to the glomerular filtration rate (GFR) reported for horses. The CL of gentamicin C1 and C2 were 1.03 ± 0.08 ml/min x kg and 1.10 ± 0.15 ml/min x kg, respectively, and significantly slower than that of gentamicin C1a. The values of apparent volume of distribution at steady state were 0.22 ± 0.05, 0.26 ± 0.12 and 0.23 ± 0.05 l/kg for gentamicin C1, C1a and C 2, respectively. The MRT values were mean ± s.d. 3.6 ± 0.5, 2.7 ± 0.3 and 3.5 ± 0.4 h and the t1/2 values were 3.1 (2.5-4.0), 2.4 (2.0-3.2) and 3.3 (2.4-4.3) h (harmonic mean and range) for gentamicin C1, C1a and C2, respectively. The MRT and t1/2 values for gentamicin C1a were significantly shorter than those of gentamicin C1 and C2. It was concluded that the difference in pharmacokinetics between the gentamicin components has potential pharmacological and toxicological implications.
KW - Gentamicin
KW - Gentamicin C, C, C
KW - Horse
KW - Pharmacokinetics
UR - http://www.scopus.com/inward/record.url?scp=0036719631&partnerID=8YFLogxK
U2 - 10.2746/042516402776180160
DO - 10.2746/042516402776180160
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
C2 - 12358003
AN - SCOPUS:0036719631
SN - 0425-1644
VL - 34
SP - 615
EP - 618
JO - Equine Veterinary Journal
JF - Equine Veterinary Journal
IS - 6
ER -