Characterisation of the in vitro activity of a Nitazoxanide-N-methyl-1H-benzimidazole hybrid molecule against albendazole and nitazoxanide susceptible and resistant strains of Giardia intestinalis and its in vivo giardicidal activity
Mem. Inst. Oswaldo Cruz
;
115: e190348, 2020. tab, graf
Article
in English
| LILACS
| ID: biblio-1091246
ABSTRACT
BACKGROUND It was previously demonstrated that CMC-20, a nitazoxanide and N-methyl-1H-benzimidazole hybrid molecule, had higher in vitro activity against Giardia intestinalis WB strain than metronidazole and albendazole and similar to nitazoxanide. OBJETIVES To evaluate the in vitro activity of CMC-20 against G. intestinalis strains with different susceptibility/resistance to albendazole and nitazoxanide and evaluate its effect on the distribution of parasite cytoskeletal proteins and its in vivo giardicidal activity. METHODS CMC-20 activity was tested against two isolates from patients with chronic and acute giardiasis, an experimentally induced albendazole resistant strain and a nitazoxanide resistant clinical isolate. CMC-20 effect on the distribution of parasite cytoskeletal proteins was analysed by indirect immunofluorescence and its activity was evaluated in a murine model of giardiasis. FINDINGS CMC-20 showed broad activity against susceptible and resistant strains to albendazole and nitaxozanide. It affected the parasite microtubule reservoir and triggered the parasite encystation. In this process, alpha-7.2 giardin co-localised with CWP-1 protein. CMC-20 reduced the infection time and cyst load in feces of G. muris infected mice similar to albendazole. MAIN CONCLUSIONS The in vitro and in vivo giardicidal activity of CMC-20 suggests its potential use in the treatment of giardiasis.
Full text:
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Index:
LILACS (Americas)
Main subject:
Thiazoles
/
Albendazole
/
Giardia lamblia
/
Cytoskeletal Proteins
/
Antiprotozoal Agents
Type of study:
Prognostic study
Limits:
Animals
/
Humans
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2020
Type:
Article
Affiliation country:
Mexico
Institution/Affiliation country:
Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional/MX
/
Escuela Nacional de Ciencias Biológicas-Instituto Politécnico Nacional/MX
/
Instituto Mexicano del Seguro Social/MX
/
Universidad Nacional Autónoma de México/MX
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