Cited by 226Antifungal resistance and susceptibilityAntibiotics Pharmacokinetics and EfficacyFungal Infections and Studies

In Vivo Comparison of the Pharmacodynamic Targets for Echinocandin Drugs against Candida Species

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Andes, D., Diekema, D. J., Pfaller, M. A., Bohrmuller, J., Marchillo, K., Lepak, A.·2010·Antimicrobial Agents and Chemotherapy

Abstract

Previous pharmacodynamic studies using in vivo candidiasis models have demonstrated that the 24-h area under the concentration-time curve (AUC)/MIC is a good descriptor of the echinocandin exposure-response relationship. Further studies investigating the 24-h AUC/MIC target for a stasis endpoint identified free-drug 24-h AUC/MIC against Candida albicans and were similar for two echinocandins, anidulafungin and micafungin. The current studies expand investigation of a third echinocandin (caspofungin) and compare the pharmacodynamic target among C. albicans , Candida glabrata , and Candida parapsilosis . Treatment studies were conducted with six C. albicans , nine C. glabrata , and 15 C. parapsilosis strains with various MICs (anidulafungin, 0.015 to 4.0 μg/ml; caspofungin, 0.03 to 4.0 μg/ml; and micafungin, 0.008 to 1.0 μg/ml). Efficacy was closely tied to MIC and the 24-h AUC/MIC. Therapy against C. parapsilosis required more of each echinocandin on a mg/kg basis. Caspofungin required less drug on a mg/kg basis for efficacy against all of the organisms than did the other two drugs. However, the 24-h AUC/MIC targets were similar among the echinocandins when free drug concentrations were considered, suggesting the relevance of protein binding. The targets for C. parapsilosis (mean, 7) and C. glabrata (mean, 7) were significantly lower than those for C. albicans (mean, 20) for each echinocandin. The results suggest that current susceptibility breakpoints and the consideration of organism species in these determinations should be reexplored.

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Crossref · 10.1128/aac.01584-09

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  • The amount of echinocandin relative to the MIC needed for efficacy was higher for C. albicans than for C. glabrata or C. parapsilosis.

    “The results of these studies demonstrated the amount of echinocandin relative to the MIC needed for efficacy was higher for C albicans than for C glabrata or C parapsilosis.”
  • The free drug AUC/MIC target for echinocandins was approximately 5 to 7 for C. parapsilosis and C. glabrata, whereas for C. albicans the target AUC/MIC was approximately 10 to 20.

    “The free drug AUC/MIC target was much less for C parapsilosis and C glabrata at approximately 5 to 7, whereas for C albicans the target AUC/MIC was approximately 10 to 20.”

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Authors
Andes, D., Diekema, D. J., Pfaller, M. A., Bohrmuller, J., Marchillo, K., & Lepak, A.
Affiliations
  • University of Wisconsin–Madison (US)
  • University of Iowa (US)
Venue
Antimicrobial Agents and Chemotherapy
Published
2010-06
Volume
54
Issue
6
Pages
2497-2506
ISSN
  • 0066-4804 (ISSN-L)
  • 1098-6596
OpenAlex
W2147335917
Cited by
226
References
57
Citations by year
2026: 5 · 2025: 8 · 2024: 11 · 2023: 11 · 2022: 9 · 2021: 16 · 2020: 21 · 2019: 10 · 2018: 11 · 2017: 18 · 2016: 15 · 2015: 10 · 2014: 18 · 2013: 15 · 2012: 14
FWCI
12.81
Type
journal article
Language
en
Open access
Locations
  • Antimicrobial Agents and Chemotherapy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Pfizer
  • Astellas Pharma
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Health Sciences › Medicine › Pharmacology › Antibiotics Pharmacokinetics and Efficacy
  • Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
Keywords
echinocandins, caspofungin, anidulafungin, micafungin, Candida albicans, Candida glabrata, Candida parapsilosis, therapeutic target, AUC/MIC, free drug concentration, protein binding, antifungal susceptibility breakpoints
MeSH terms
Caspofungin, Micafungin, Anidulafungin, Animals, Antifungal Agents, Candida, Candida albicans, Candidiasis, Female, Kidney, Mice, Inbred ICR, Microbial Sensitivity Tests, Protein Binding, Species Specificity, Candida glabrata, Mice, Echinocandins, Lipopeptides

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