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Published in: Journal of Parasitic Diseases 1/2024

05-12-2023 | Toxoplasmosis | Original Article

Modulation of CXCL10 activity as a therapeutic target of ocular toxoplasmosis in diabetic mice

Authors: Mennat-Elrahman Ahmed Fahmy, Amany Ahmed Abdel-Aal, Maisa Ahmed Shalaby, Ragaa Issa, Manal Badawi, Marwa A. Fouly

Published in: Journal of Parasitic Diseases | Issue 1/2024

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Abstract

Ocular toxoplasmosis is likely the most common cause of infectious posterior uveitis worldwide. CXCL10 chemokine has an important role in the maintenance of the T-cell response and the control of Toxoplasma gondii in the eye during chronic infection. Drugs that can modulate the chemokine activity could be effective against the parasite. In this work, CXCL10 local retinal expression was investigated in a diabetic mouse model with ocular toxoplasmosis for the first time. In addition, the efficacy of naphthoquinones and quinolones was compared to spiramycin (SP) in treating the infection and modulating the chemokine expression. Our results revealed that chloroquine (CQ) achieved the best results regarding the reduction of cerebral cyst burden (84.36%), improving the retinal histopathological changes, cellular infiltrates, and vasculitis significantly (P < 0.005), and balancing the strong CXCL10 expression caused by the infection. Buparvaquone-treated mice showed a significant percentage of reduction of brain cysts (76.25%), moderate improvement of histopathology, and mild to moderate CXCL10 expression. While SP showed the least efficacy against the parasite in the eye in the form of mild improvement of histopathological changes and downregulation of retinal chemokine expression with the least reduction rate of cerebral parasitic burden (57%). In conclusion, Optimal control of pathogens probably needs a balanced immune response with an optimum expression of chemokines. So, targeting the modulation of retinal CXCL10 may eventually be beneficial in the management of ocular toxoplasmosis plus its potential to act as a marker for predictive local immunological response during the infection.
Literature
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Metadata
Title
Modulation of CXCL10 activity as a therapeutic target of ocular toxoplasmosis in diabetic mice
Authors
Mennat-Elrahman Ahmed Fahmy
Amany Ahmed Abdel-Aal
Maisa Ahmed Shalaby
Ragaa Issa
Manal Badawi
Marwa A. Fouly
Publication date
05-12-2023
Publisher
Springer India
Published in
Journal of Parasitic Diseases / Issue 1/2024
Print ISSN: 0971-7196
Electronic ISSN: 0975-0703
DOI
https://doi.org/10.1007/s12639-023-01635-1

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