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| DOI | 10.1186/S12936-024-04960-9 | ||||
| Año | 2024 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Background The sequestration of Plasmodium falciparum infected erythrocytes in the placenta, and the resulting inflammatory response affects maternal and child health. Despite existing information, little is known about the direct impact of P. falciparum on the placental barrier formed by trophoblast and villous stroma. This study aimed to assess placental tissue damage caused by P. falciparum in human placental explants (HPEs). Methods HPEs from chorionic villi obtained of human term placentas (n = 9) from normal pregnancies were exposed to P. falciparum-infected erythrocytes (IE) for 24 h. HPEs were embedded in paraffin blocks and used to study tissue damage through histopathological and histochemical analysis and apoptosis using TUNEL staining. Culture supernatants were collected to measure cytokine and angiogenic factors and to determine LDH activity as a marker of cytotoxicity. A subset of archived human term placenta paraffin-embedded blocks from pregnant women with malaria were used to confirm ex vivo findings. Results Plasmodium falciparum-IE significantly damages the trophoblast layer and the villous stroma of the chorionic villi. The increased LDH activity and pathological findings such as syncytial knots, fibrin deposits, infarction, trophoblast detachment, and collagen disorganization supported these findings. The specific damage to the trophoblast and the thickening of the subjacent basal lamina were more pronounced in the ex vivo infection. In contrast, apoptosis was higher in the in vivo infection. This disparity could be attributed to the duration of exposure to the infection, which significantly varied between individuals naturally exposed over time and the 24-h exposure in the ex vivo HPE model. Conclusion Exposure to P. falciparum-IE induces a detachment of the syncytiotrophoblast, disorganization of the stroma villi, and an increase in apoptosis, alterations that may be associated with adverse results such as intrauterine growth restriction and low birth weight.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Lopez-Guzman, Carolina | - |
UNIV ANTIOQUIA - Colombia
Universidad de Antioquia - Colombia |
| 2 | Garcia, Ana Maria | - |
UNIV ANTIOQUIA - Colombia
Universidad de Antioquia - Colombia |
| 3 | Ramirez, Juan Diego | - |
UNIV ANTIOQUIA - Colombia
Universidad de Antioquia - Colombia |
| 4 | Aliaga, Trinidad Torres | - |
Universidad de Chile - Chile
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| 5 | Fernandez-Moya, Alejandro | Hombre |
Universidad de Chile - Chile
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| 6 | KEMMERLING-WEIS, ULRIKE | Mujer |
Universidad de Chile - Chile
|
| 7 | Vasquez, Ana Maria | - |
UNIV ANTIOQUIA - Colombia
Universidad de Antioquia - Colombia |
| Fuente |
|---|
| Minciencias (Ministerio de Ciencia Tecnologia e Innovacion), Colombia |
| Clínica El Rosario, Poblado and Central branch |
| Agradecimiento |
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| This study was supported by Minciencias (Ministerio de Ciencia Tecnologia e Innovacion), Colombia, project code 111584467585, CT 921-2019. |
| We would like to thank Cl\u00EDnica El Rosario, Poblado and Central branch, with whom it was possible to obtain approval from the Bioethics Committee for the inclusion of placentas donated by patients who signed informed consent. |