DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi.
Trypanosoma cruzi is the etiologic agent of Chagas' disease. Infected cells with T. cruzi activate several responses that promote unbalance of reactive oxygen species (ROS) that may cause DNA damage that activate cellular responses including DNA repair processes. In this work, HeLa cells and AC...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2021-04-01
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| Series: | PLoS Pathogens |
| Online Access: | https://doi.org/10.1371/journal.ppat.1009502 |
| _version_ | 1818589144662671360 |
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| author | Pilar T V Florentino Davi Mendes Francisca Nathalia L Vitorino Davi J Martins Julia P C Cunha Renato A Mortara Carlos F M Menck |
| author_facet | Pilar T V Florentino Davi Mendes Francisca Nathalia L Vitorino Davi J Martins Julia P C Cunha Renato A Mortara Carlos F M Menck |
| author_sort | Pilar T V Florentino |
| collection | DOAJ |
| description | Trypanosoma cruzi is the etiologic agent of Chagas' disease. Infected cells with T. cruzi activate several responses that promote unbalance of reactive oxygen species (ROS) that may cause DNA damage that activate cellular responses including DNA repair processes. In this work, HeLa cells and AC16 human cardiomyocyte cell line were infected with T. cruzi to investigate host cell responses at genome level during parasites intracellular life cycle. In fact, alkaline sensitive sites and oxidized DNA bases were detected in the host cell genetic material particularly in early stages of infection. These DNA lesions were accompanied by phosphorylation of the histone H2Ax, inducing γH2Ax, a marker of genotoxic stress. Moreover, Poly [ADP-ribose] polymerase-1 (PARP1) and 8-oxoguanine glycosylase (OGG1) are recruited to host cell nuclei, indicating activation of the DNA repair process. In infected cells, chromatin-associated proteins are carbonylated, as a possible consequence of oxidative stress and the nuclear factor erythroid 2-related factor 2 (NRF2) is induced early after infection, suggesting that the host cell antioxidant defenses are activated. However, at late stages of infection, NRF2 is downregulated. Interestingly, host cells treated with glutathione precursor, N-acetyl cysteine, NRF2 activator (Sulforaphane), and also Benznidonazol (BNZ) reduce parasite burst significantly, and DNA damage. These data indicate that the balance of oxidative stress and DNA damage induction in host cells may play a role during the process of infection itself, and interference in these processes may hamper T. cruzi infection, revealing potential target pathways for the therapy support. |
| first_indexed | 2024-12-16T09:35:59Z |
| format | Article |
| id | doaj.art-9a653777f44749288db259984be0b119 |
| institution | Directory Open Access Journal |
| issn | 1553-7366 1553-7374 |
| language | English |
| last_indexed | 2024-12-16T09:35:59Z |
| publishDate | 2021-04-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Pathogens |
| spelling | doaj.art-9a653777f44749288db259984be0b1192022-12-21T22:36:25ZengPublic Library of Science (PLoS)PLoS Pathogens1553-73661553-73742021-04-01174e100950210.1371/journal.ppat.1009502DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi.Pilar T V FlorentinoDavi MendesFrancisca Nathalia L VitorinoDavi J MartinsJulia P C CunhaRenato A MortaraCarlos F M MenckTrypanosoma cruzi is the etiologic agent of Chagas' disease. Infected cells with T. cruzi activate several responses that promote unbalance of reactive oxygen species (ROS) that may cause DNA damage that activate cellular responses including DNA repair processes. In this work, HeLa cells and AC16 human cardiomyocyte cell line were infected with T. cruzi to investigate host cell responses at genome level during parasites intracellular life cycle. In fact, alkaline sensitive sites and oxidized DNA bases were detected in the host cell genetic material particularly in early stages of infection. These DNA lesions were accompanied by phosphorylation of the histone H2Ax, inducing γH2Ax, a marker of genotoxic stress. Moreover, Poly [ADP-ribose] polymerase-1 (PARP1) and 8-oxoguanine glycosylase (OGG1) are recruited to host cell nuclei, indicating activation of the DNA repair process. In infected cells, chromatin-associated proteins are carbonylated, as a possible consequence of oxidative stress and the nuclear factor erythroid 2-related factor 2 (NRF2) is induced early after infection, suggesting that the host cell antioxidant defenses are activated. However, at late stages of infection, NRF2 is downregulated. Interestingly, host cells treated with glutathione precursor, N-acetyl cysteine, NRF2 activator (Sulforaphane), and also Benznidonazol (BNZ) reduce parasite burst significantly, and DNA damage. These data indicate that the balance of oxidative stress and DNA damage induction in host cells may play a role during the process of infection itself, and interference in these processes may hamper T. cruzi infection, revealing potential target pathways for the therapy support.https://doi.org/10.1371/journal.ppat.1009502 |
| spellingShingle | Pilar T V Florentino Davi Mendes Francisca Nathalia L Vitorino Davi J Martins Julia P C Cunha Renato A Mortara Carlos F M Menck DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. PLoS Pathogens |
| title | DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. |
| title_full | DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. |
| title_fullStr | DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. |
| title_full_unstemmed | DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. |
| title_short | DNA damage and oxidative stress in human cells infected by Trypanosoma cruzi. |
| title_sort | dna damage and oxidative stress in human cells infected by trypanosoma cruzi |
| url | https://doi.org/10.1371/journal.ppat.1009502 |
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