Activity of VT-1129 against Cryptococcus neoformans clinical isolates with high fluconazole MICs

Kirsten Nielsen, Priya Vedula, Kyle D. Smith, David B. Meya, Edward P. Garvey, William J. Hoekstra, Robert J. Schotzinger, David R Boulware

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Although antifungal drug resistance in the human fungal pathogen Cryptococcus neoformans is relatively uncommon, fluconazole-resistant strains are problematic for preemptive treatment of cryptococcal antigenemia or during cryptococcal meningitis consolidation therapy. We analyzed activity of the experimental antifungal VT-1129 on 51 clinical Cryptococcus neoformans isolates previously screened for fluconazole resistance; with an emphasis on fluconazole dose-dependent (MIC 16-32 μg/ml) or resistant (MIC ≥ 64 μg/ml) isolates. Overall, the VT-1129 geometric mean MIC was 0.027 μg/ml. The VT-1129 MIC50 was 0.05 μg/ml and 0.25 μg/ml for dose-dependent (n = 27) and resistant isolates (n = 6), respectively. These data suggest VT-1129 shows potential for use against fluconazole-resistant Cryptococcus.

Original languageEnglish (US)
Pages (from-to)453-456
Number of pages4
JournalMedical mycology
Issue number4
StatePublished - Jun 1 2017

Bibliographical note

Publisher Copyright:
© The Author 2016. Published by Oxford University Press on behalf of The International Society for Human and Animal Mycology. All rights reserved. For permissions, please e-mail:


  • CYP51
  • Cryptococcus
  • VT-1129
  • antifungal
  • azole


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