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Antifungal activity of local anesthetics against Candida species

Pina-Vaz, C; Rodrigues, A G; Sansonetty, F; Martinez-De-Oliveira, J; Fonseca, A F and Mårdh, Per-Anders LU (2000) In Infectious Diseases in Obstetrics and Gynecology 8(3-4). p.124-137
Abstract
OBJECTIVE: To evaluate the activity of benzydamine, lidocaine, and bupivacaine, three drugs with local anesthetic activity, against Candida albicans and non-albicans strains and to clarify their mechanism of activity. METHODS: The minimal inhibitory concentration (MIC) was determined for 20 Candida strains (18 clinical isolates and two American Type Culture Collection strains). The fungistatic activity was studied with the fluorescent probe FUN-1 and observation under epifluorescence microscopy and flow cytometry. The fungicidal activity of the three drugs was assayed by viability counts. Membrane alterations induced in the yeast cells were evaluated by staining with propidium iodide, by quantitation of intracellular K+ leakage and by... (More)
OBJECTIVE: To evaluate the activity of benzydamine, lidocaine, and bupivacaine, three drugs with local anesthetic activity, against Candida albicans and non-albicans strains and to clarify their mechanism of activity. METHODS: The minimal inhibitory concentration (MIC) was determined for 20 Candida strains (18 clinical isolates and two American Type Culture Collection strains). The fungistatic activity was studied with the fluorescent probe FUN-1 and observation under epifluorescence microscopy and flow cytometry. The fungicidal activity of the three drugs was assayed by viability counts. Membrane alterations induced in the yeast cells were evaluated by staining with propidium iodide, by quantitation of intracellular K+ leakage and by transmission electron microscopy of intact yeast cells and prepared spheroplasts. RESULTS: The MIC ranged from 12.5-50.0 microg/mL, 5.0-40.0 mg/mL, and 2.5-10.0 mg/mL for benzydamine, lidocaine, and bupivacaine, respectively. The inhibitory activity of these concentrations could be detected with the fluorescent probe FUN-1 after incubation for 60 minutes. A very fast fungicidal activity was shown by 0.2, 50, and 30 mg/mL of benzydamine, lidocaine, and bupivacaine, respectively. CONCLUSIONS: At lower concentrations, the tested drugs have a fungistatic activity, due to yeast metabolic impairment, while at higher concentrations they are fungicidal, due to direct damage to the cytoplasmic membrane. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Infectious Diseases in Obstetrics and Gynecology
volume
8
issue
3-4
pages
124 - 137
publisher
Hindawi Publishing Corporation
external identifiers
  • pmid:10968594
  • scopus:6744255808
ISSN
1064-7449
DOI
10.1155/S1064744900000168
language
English
LU publication?
yes
id
55f3be38-d417-4723-b7e0-43becd3b0a05 (old id 1118241)
date added to LUP
2008-06-18 13:57:32
date last changed
2017-08-06 03:36:41
@article{55f3be38-d417-4723-b7e0-43becd3b0a05,
  abstract     = {OBJECTIVE: To evaluate the activity of benzydamine, lidocaine, and bupivacaine, three drugs with local anesthetic activity, against Candida albicans and non-albicans strains and to clarify their mechanism of activity. METHODS: The minimal inhibitory concentration (MIC) was determined for 20 Candida strains (18 clinical isolates and two American Type Culture Collection strains). The fungistatic activity was studied with the fluorescent probe FUN-1 and observation under epifluorescence microscopy and flow cytometry. The fungicidal activity of the three drugs was assayed by viability counts. Membrane alterations induced in the yeast cells were evaluated by staining with propidium iodide, by quantitation of intracellular K+ leakage and by transmission electron microscopy of intact yeast cells and prepared spheroplasts. RESULTS: The MIC ranged from 12.5-50.0 microg/mL, 5.0-40.0 mg/mL, and 2.5-10.0 mg/mL for benzydamine, lidocaine, and bupivacaine, respectively. The inhibitory activity of these concentrations could be detected with the fluorescent probe FUN-1 after incubation for 60 minutes. A very fast fungicidal activity was shown by 0.2, 50, and 30 mg/mL of benzydamine, lidocaine, and bupivacaine, respectively. CONCLUSIONS: At lower concentrations, the tested drugs have a fungistatic activity, due to yeast metabolic impairment, while at higher concentrations they are fungicidal, due to direct damage to the cytoplasmic membrane.},
  author       = {Pina-Vaz, C and Rodrigues, A G and Sansonetty, F and Martinez-De-Oliveira, J and Fonseca, A F and Mårdh, Per-Anders},
  issn         = {1064-7449},
  language     = {eng},
  number       = {3-4},
  pages        = {124--137},
  publisher    = {Hindawi Publishing Corporation},
  series       = {Infectious Diseases in Obstetrics and Gynecology},
  title        = {Antifungal activity of local anesthetics against Candida species},
  url          = {http://dx.doi.org/10.1155/S1064744900000168},
  volume       = {8},
  year         = {2000},
}