Acute infection with Toxoplasma gondii oocysts preferentially activates non-neuronal cells expressing serotonin in the jejunum of rats
| Autor: | Debora de Mello Gonçales Sant'Ana, Carlos Alberto Miqueloto, João Luis Garcia, Maria José Pastre, Lucas Casagrande, Lainy Leiny de Lima, Silvia Lima Costa, Letícia Sarturi Pereira-Severi, Marcelo Biondaro Góis, Aline Rosa Trevizan, Gessilda de Alcântara Nogueira-Melo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
Serotonin Serotonergic General Biochemistry Genetics and Molecular Biology Immune system medicine Enterochromaffin Cells Animals General Pharmacology Toxicology and Pharmaceutics Rats Wistar Basement membrane biology Oocysts Toxoplasma gondii General Medicine biology.organism_classification Molecular biology Epithelium Rats medicine.anatomical_structure Jejunum Acute Disease Enterochromaffin cell Enteric nervous system Toxoplasma Immunostaining Toxoplasmosis |
| Zdroj: | Life sciences. 283 |
| ISSN: | 1879-0631 |
| Popis: | The interaction of Toxoplasma gondii with the gastrointestinal tract of its host is highly regulated. Once ingested, the parasite crosses the epithelium without altering the permeability of the intestinal barrier. Nevertheless, many studies report alterations ranging from structural to functional damage in cells and tissues that make up the wall of the small and large intestine. Although the immune response to the parasite has been extensively studied, the role of serotonin (5-HT) in toxoplasmosis is poorly understood. Here we investigate the distribution of cells expressing 5-HT and its effects on cells and tissues of the jejunal wall of rats after 2, 3, or 7 days of T. gondii infection. Key results Our results show that transposition of the jejunal epithelium by T. gondii leads to ruptures in the basement membrane and activation of the immune system, as confirmed by the decrease in laminin immunostaining and the increase in the number of mast cells, respectively. Conclusions and inferences We showed an increase in the number of enterochromaffin cells and mast cells expressing 5-HT in the jejunal wall. We also observed that the percentage of serotonergic mast cells increased in the total population. Thus, we can suggest that oral infection by T. gondii oocysts preferentially activates non-neuronal cells expressing 5-HT. Together, these results may explain both the changes in the extracellular matrix and the morphology of the enteric ganglia. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect