Temporal expression of Toxoplasma stage-specific genes in brain tissue: coincidence with parasitological and histopathological findings in mice models
| Autor: | Mona H El-Sayad, Omnya A El Geddawi, Hend A El-Taweel, Neveen A. Hussein, Amany Hussein Kazem, Enas M Rizk |
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| Rok vydání: | 2020 |
| Předmět: |
Parasite Encystment
medicine.medical_specialty Pathology Genes Protozoan Group A BAG1 law.invention Mice law parasitic diseases Gene expression medicine Animals Polymerase chain reaction Dexamethasone Life Cycle Stages General Veterinary biology Brain Gene Expression Regulation Developmental Toxoplasma gondii General Medicine medicine.disease biology.organism_classification Toxoplasmosis Toxoplasmosis Animal Infectious Diseases Insect Science Female Parasitology Histopathology Toxoplasma medicine.drug |
| Zdroj: | Parasitology Research. 119:2299-2307 |
| ISSN: | 1432-1955 0932-0113 |
| DOI: | 10.1007/s00436-020-06723-2 |
| Popis: | In the intermediate hosts, tachyzoites of T. gondii predominate in the acute stage while bradyzoites persist inside tissue cysts with the potential for reactivation. The two stages exhibit different metabolic and antigenic characters. The present study aimed to investigate temporal expression of Toxoplasma SAG1 and BAG1 genes in the brain tissue and the coincident parasitological and histopathological findings in mice models of toxoplasmosis. The study included group A: mice infected with RH strain and sacrificed 7 days post-infection (p.i.); group B: mice infected with RH strain and treated with sulfamethoxazole-trimethoprim (30 mg/kg/day and 150 mg/kg/day respectively) 24 h p.i. until sacrificed at days 5, 10, or 20 post-treatment; group C: mice infected with ME-49 strain and sacrificed at days 7, 27, 47, or 67 p.i; and group D: mice infected with ME-49 strain and received dexamethasone daily starting at day 68 p.i. and scarified at days 6 or 10 post-treatment. All mice were inspected daily for abnormal physical signs. Peritoneal exudate and brain homogenate were examined for detection of Toxoplasma stages. Brain sections were examined histopathologically. SAG1 and BAG1 gene expression was evaluated using reverse transcription real-time polymerase chain reaction and the ΔΔCt method. Results revealed that marked BAG1 upregulation is consistent with detection of Toxoplasma cysts and degenerative changes while predominance of tachyzoites and inflammatory infiltrate is compatible with SAG1 upregulation. The study sheds light on the potential for using stage-specific gene expression pattern as markers for evaluation of toxoplasmosis disease progression in clinical settings. |
| Databáze: | OpenAIRE |
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