Abstract
Purposes
To evaluate the effects of component contents in different colistin methanesulfonate (CMS) formulas on their clinical pharmacokinetics of the prodrug CMS and the formed colistin.
Methods
Two CMS formulas (CTTQ and Parkedale) were investigated in a single dose, randomized, open-label, crossover study conducted in 18 healthy Chinese subjects. Both CMS formulas met the requirements of European Pharmacopoeia 9.2 with 12.1% difference in the two major active components (CMS A and CMS B). The PK parameters after a single intravenous infusion of CMS at 2.5 mg/kg were calculated and the steady-state plasma colistin concentrations (Css,avg) following multiple dosing, once every 12 h for 7 days, were simulated with the non-compartment model.
Results
The systemic exposure (AUC0-inf) of CMS were 59.49 ± 5.90 h·μg/mL and 51.09 ± 4.70 h·μg/mL, and the AUC0-inf of colistin were 15.39 ± 2.63 h·μg/mL and 12.36 ± 2.10 h·μg/mL for CTTQ and Parkedale, respectively. The ratios (90% CI) of geometric mean of AUC0-inf of CTTQ to Parkedale were 116.38% (112.95%, 119.91%) and 124.49% (120.76%, 128.35%) for CMS and colistin, respectively. The predicted Css,avg (95% CI) were 0.92 (0.85, 0.99) μg/mL and 0.74 (0.69, 0.79) μg/mL for CTTQ and Parkedale, respectively.
Conclusion
The difference in component content in the two CMS formulas had a significant (P < 0.001) impact on the systemic exposure of colistin in human, thus, warranted essential considerations in clinical applications.
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Abbreviations
- AE:
-
Adverse events
- AKI:
-
Acute kidney injury
- AUC0–12 :
-
Area under the concentration–time curve from time 0 to 12 h after drug administration
- AUC0–24 :
-
Area under the concentration–time curve from time 0 to 24 h after drug administration
- AUC0-inf :
-
Area under the concentration–time curve from time zero to infinity after drug administration
- AUCss,24 :
-
Steady-state 24-h area under the concentration-time curve
- BMI:
-
Body mass index
- CBA:
-
Colistin base activity
- CLr :
-
Renal clearance
- CLt :
-
Total clearance
- Cmax :
-
Peak concentration
- CMS:
-
Colistin methanesulfonate
- CMSA:
-
Colistin A methanesulfonate
- CMSB:
-
Colistin B methanesulfonate
- Css,avg :
-
Average steady-state concentration
- CysC:
-
Cysteine dehydrogenase inhibitor C
- fAUC/MIC:
-
Ratio of area under curve of free colistin over minimum inhibitory concentration
- f m :
-
Fraction of CMS converted into colistin in blood
- MIC:
-
Minimum inhibitory concentration
- NGAL:
-
Neutrophil gelatinase-associated lipocalin
- PK:
-
Pharmacokinetics
- PK/PD:
-
Pharmacokinetic/pharmacodynamic
- SAE:
-
Serious adverse events
- T1/2 :
-
Half time
- TDM:
-
Therapeutic drug monitoring
- Tmax :
-
Time to peak concentration
- Vd :
-
Distribution volume
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ACKNOWLEDGEMENT AND DISCLOSURES
The authors declare no conflict of interest. The authors would like to thank CHIA TAI TIAN-QING Pharmaceutical Group Co., Ltd. (Jiangsu, China) for kindly providing the CMS formula. This study was supported by Major Research and Development Project of Innovative Drugs, Ministry of Science and Technology (2017ZX09304005). The authors would also like to thank Professor Jian Li, Facility for Anti-Infective Drug Development and Innovation, Victorian College of Pharmacy, Monash University for his advice on PK analysis.
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Fan, YX., Chen, YC., Li, Y. et al. Effects of Different Component Contents of Colistin Methanesulfonate on the Pharmacokinetics of Prodrug and Formed Colistin in Human. Pharm Res 38, 79–87 (2021). https://doi.org/10.1007/s11095-021-02991-4
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DOI: https://doi.org/10.1007/s11095-021-02991-4