Cited by 29Antifungal resistance and susceptibilityFungal and yeast genetics researchFungal Plant Pathogen Control

Multifactorial Role of Mitochondria in Echinocandin Tolerance Revealed by Transcriptome Analysis of Drug-Tolerant Cells

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Garcia-Rubio, Rocio, Jimenez-Ortigosa, Cristina, DeGregorio, Lucius, Quinteros, Christopher, Shor, Erika, Perlin, David S.·2021·mBio

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Abstract

Echinocandin drugs are a first-line therapy to treat invasive candidiasis, which is a major source of morbidity and mortality worldwide. The opportunistic fungal pathogen Candida glabrata is a prominent bloodstream fungal pathogen, and it is notable for rapidly developing echinocandin-resistant strains associated with clinical failure.

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Crossref · 10.1128/mbio.01959-21

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  • That same study also tested "mitochondrial inhibitors" that either have multiple cellular targets or have no targets at all in C. glabrata, producing data that did not match the mitochondria-deficient mutants.

    “That same study also tested “mitochondrial inhibitors” that either have multiple cellular targets (sodium azide) or have no targets at all in C. glabrata (diphenyleneiodonium chloride, rotenone), producing data that did not match the mitochondria-deficient mutants.”

    From Echinocandin tolerance and persistence <i>in vitro</i> are regulated by calcineurin signaling in <i>Candida glabrata</i> (2026) · cites this paper as [47]

    The Results section (page unavailable) confirms that the study tested rotenone, DPI, and sodium azide and found that inhibitor treatment and mitochondrial defects had different effects on caspofungin tolerance. But the Discussion identifies DPI as an inhibitor of NADH dehydrogenases and sodium azide as an inhibitor of complex IV; it does not support describing DPI as having no target or sodium azide as having multiple cellular targets in C. glabrata. It notes that C. glabrata lacks rotenone’s canonical complex I target, while suggesting rotenone may also act through other pathways. (LLM, conf=0.88)

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  • That conclusion is inconsistent with the genetic data reported there and here, showing that several mitochondria-deficient knockout mutants exhibited wild-type levels of viability after long exposure to high doses of echinocandins.

    “That conclusion is inconsistent with the genetic data reported there (47) and here (Fig. S4), showing that several mitochondria-deficient knockout mutants (cox4∆, atp1∆, atp2∆, atp10∆, mrp20∆) exhibited wild-type levels of viability after long exposure to high doses of echinocandins.”

    From Echinocandin tolerance and persistence <i>in vitro</i> are regulated by calcineurin signaling in <i>Candida glabrata</i> (2026) · cites this paper as [47]

    The Results section (page unavailable) reports 24-hour caspofungin survival assays involving cox4Δ, atp1Δ, atp2Δ, and atp10Δ. It describes these mutants as less tolerant at one or more concentrations, particularly below the MIC, but does not state that they had wild-type viability at high doses. The paper also does not report an mrp20Δ mutant; the citing sentence attributes data from the citing paper’s own Fig. S4 as well. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • A recent study concluded that mitochondrial dysfunction decreases tolerance to echinocandins in C. glabrata.

    “A recent study concluded that mitochondrial dysfunction decreases tolerance to echinocandins in C. glabrata (47).”

    From Echinocandin tolerance and persistence <i>in vitro</i> are regulated by calcineurin signaling in <i>Candida glabrata</i> (2026) · cites this paper as [47]

    The Discussion (Fig. 8) says chronic mitochondrial dysfunction decreases echinocandin tolerance in C. glabrata. But the Discussion also distinguishes this from acute mitochondrial inhibition, which reduced echinocandin-mediated killing. The claim omits that important qualification. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The recent report did not make use of time-kill experiments and extensively utilized low-resolution dose-kill experiments.

    “The recent report (47) did not make use of time-kill experiments and extensively utilized low-resolution dose-kill experiments, in which CFU are quantified at only one time point (24 h) after exposure to varying doses of echinocandins (23).”
  • Caspofungin stress itself can induce reactive oxygen species (ROS) accumulation, which has been linked to decreased susceptibility and may act as a driver of lipid peroxidation.

    “caspofungin stress itself can induce reactive oxygen species (ROS) accumulation [54], which has been linked to decreased susceptibility and may act as a driver of lipid peroxidation”

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Authors
Garcia-Rubio, R., Jimenez-Ortigosa, C., DeGregorio, L., Quinteros, C., Shor, E., & Perlin, D. S.
Affiliations
  • Center for Discovery and Innovation, Hackensack Meridian Health, Nutley, New Jersey, USA
  • Hackensack Meridian Health (US)
  • Georgetown University (US)
Corresponding author
  • Shor, Erika
  • Perlin, David S.
Venue
mBio
Published
2021-08-31
Volume
12
Issue
4
Pages
e0195921-e0195921
ISSN
2150-7511 (ISSN-L)
OpenAlex
W3189016689
Cited by
29
References
73
Citations by year
2026: 3 · 2025: 9 · 2024: 4 · 2023: 5 · 2022: 7 · 2021: 1
FWCI
1.35
Type
journal article
Language
en
Open access
Locations
  • mBio (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
HHS | National Institutes of Health (5R01AI109025)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Fungal Plant Pathogen Control
Keywords
Candida glabrata, mitochondrial function, echinocandin resistance, invasive candidiasis, electron transport inhibition, gene expression signatures, antifungal resistance, fungemia
MeSH terms
Antifungal Agents, Microbial Sensitivity Tests, Mitochondria, Stress, Physiological, Gene Expression Profiling, Candida glabrata, Echinocandins

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