Effect of treatment with caspofungin on the diagnosis of fungal infections by gamma scintigraphy

Dublin Core

Title

Effect of treatment with caspofungin on the diagnosis of fungal infections by gamma scintigraphy

Subject

TECNECIO
RADIOFARMACOS
CANDIDA ALBICANS
ESTAFILOCOCOS
BIBLIOGRAFIA NACIONAL QUIMICA
2017

Abstract

The aim of this work was to assess the influence of treatment with U-Caspofungin, on the quality of diagnostic scintigraphic images of induced lesions in nude mice undergoing both bacterial and fungal infections and to determine the level of specificity of 99mTc-tricarbonyl-Caspofungin to discriminate between fungal or bacterial infections. In vitro studies on the behaviour of the 99mTc-tricarbonyl-Caspofungin complex binding percentage at different yeast concentrations of Candida albicans or Staphyolococcus aureus were determined. The incubation was performed with and without U-Caspofungin. In vivo evaluation was performed of 6 groups of athymic mice: sham, inflammation (LPS), fungal infection with Candida albicans (CA) and bacterial infection with Staphylocuccus aureus (SA). In vitro studies showed that the uptake of the complex by both yeasts and bacteria, depends on the concentration of colony forming units (cfu), and that this uptake is favoured by the presence of UCaspofungin that increases the membrane permeability to the 99mTc-tricarbonyl-Caspofungin complex. In vivo evaluation showed low uptake in sterile inflammation model and moderate to high uptake in infections models both treated or not with U-Caspofungin. The results of biodistributions were compatible with scintigraphic images. Conclusion: The uptake of the complex depends on the load of microorganisms, but it presents high sensibility, even at low concentrations of the infecting agent. The treatment with U-Caspofungin has no influence on the quality of the scintigraphic images used for diagnosis and localization of infection foci.

Creator

Fernández González, Leticia
Reyes, A. L.
Oliver, Patricia

Source

Current Radiopharmaceuticals v. 10, no. 2, 2017. -- p. 131-138

Publisher

Ingenta

Date

2017

Rights

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Format

PDF

Language

Inglés

Type

Articulo

Identifier

DOI: 10.2174/1874471010666170703125709

Document Item Type Metadata

Original Format

PDF
Date Added
April 12, 2018
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Fernández González, Leticia et al., “Effect of treatment with caspofungin on the diagnosis of fungal infections by gamma scintigraphy,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/4925.