Fasciola hepatica reinfection potentiates a mixed Th1/Th2/Th17/Treg response and correlates with the clinical phenotypes of anemia

Valero, M. Adela; Pérez-Crespo, Ignacio; Chillón-Marinas, Carlos; Khoubbane, Messaoud; Quesada, Carla; Reguera-Gómez, Marta; Mas‐Coma, Santiago; Fresno, Manuel; Gironès, Núria

doi:10.1371/journal.pone.0173456

Cited by 39 publications

(33 citation statements)

References 93 publications

(112 reference statements)

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“…The results obtained indicate that altiplanic sheep and cattle should be considered the main animal reservoir species involved in F. hepatica transmission and therefore also of the infection and reinfection risks of humans and which have immunological and clinical consequences (90,91). The infections and reinfections in children are detected in the monitorings by appropriate coprological techniques (37,92) in between yearly mass treatment campaigns implemented in this hyperendemic area.…”

Section: Discussionmentioning

confidence: 90%

Sheep and Cattle Reservoirs in the Highest Human Fascioliasis Hyperendemic Area: Experimental Transmission Capacity, Field Epidemiology, and Control Within a One Health Initiative in Bolivia

et al. 2020

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Section: Discussionmentioning

confidence: 90%

Sheep and Cattle Reservoirs in the Highest Human Fascioliasis Hyperendemic Area: Experimental Transmission Capacity, Field Epidemiology, and Control Within a One Health Initiative in Bolivia

et al. 2020

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“…Although CD4 + Th17 cells play a role in the control of a variety of parasitic infections, the role of IL-17 produced by CD4 + Th17 cells in immunity to F. gignatica has not been clearly defined [ 38 , 39 ]. Our current and previous studies [ 8 ], demostrated that IL-17 may play a role in the inflammatory process during early F. gigantica infection.…”

Section: Discussionmentioning

confidence: 99%

Dynamic expression of cytokine and transcription factor genes during experimental Fasciola gigantica infection in buffaloes

et al. 2017

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BackgroundDetermining the mechanisms involved in the immune-pathogenesis of the tropical liver fluke, Fasciola gigantica, is crucial to the development of any effective therapeutic intervention. Here, we examined the differential gene expression of cytokines and transcription factors in the liver of F. gigantica-infected buffaloes, over the course of infection.MethodsWater buffaloes (swamp type) were infected orally with 500 F. gigantica encysted metacercariae. Liver tissue samples were collected 3, 10, 28, 42, 70 and 98 days post-infection (dpi). Levels of gene expression of nine cytokines (IFN-γ, TGF-β, IL-1β, IL-4, IL-6, IL-10, IL-12B, IL-13 and IL-17A) and four transcription factors (T-bet, GATA-3, Foxp3 and ROR-γτ) were determined using quantitative real-time PCR (qRT-PCR). We evaluated any correlation between gene expression of these immune-regulatory factors and the severity of liver pathology.ResultsHistopathological examination revealed that cellular infiltration, hemorrhage and fibrosis without calcification in the liver parenchyma of infected buffaloes, increased over the course of infection. This progressive pathology was attributed to dysregulated and excessive inflammatory responses induced by infection. The early infection phase (3–10 dpi) was marked by a generalized immunosuppression and elevated TGF-β expression in order to facilitate parasite colonization. A mixed Th1/Th2 immune response was dominant from 28 to 70 dpi, to promote parasite survival while minimizing host tissue damage. During late infection (98 dpi), the response was biased towards Th1/Treg in order to inhibit the host’s Th2 protective response and promote chronic infection. Both IL-10 and IL-17A and the Th17/Treg balance, played key roles in mediating the inflammatory and immunoregulatory mechanisms in the liver during chronic fasciolosis.ConclusionsOur data showed distinct CD4+ T helper (Th) polarization and cytokine dysregulation in response to F. gigantica infection in water buffaloes over the course of infection. Characterizing the temporal expression profiles for host immune genes during infection should provide important information for defining how F. gigantica adapts and survives in the liver of buffaloes and how host immune responses influence F. gigantica pathogenicity.

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“…In schistosomiasis and filariasis, it was observed in individuals with a chronic pathology that the parasite causes a damaging immunopathology, with high levels of Th1-, Th2-, and Th17-type cytokines being found in serum (42). Reinfection with Fasciola hepatica potentiates a mixed Th1/Th2/Th17/regulatory T cell response in Wistar rats (43). A mixed Th1/Th2 cytokine response was also observed in mice treated with Taenia solium metacestode antigens (44).…”

Section: Fig 10mentioning

confidence: 99%

Whipworm Infection Promotes Bacterial Invasion, Intestinal Microbiota Imbalance, and Cellular Immunomodulation

et al. 2020

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Infections with Trichuris trichiura are among the most common causes of intestinal parasitism in children worldwide, and the diagnosis is based on microscopic egg identification in the chronic phase of the infection. During parasitism, the adult worm of the trichurid nematode maintains its anterior region inserted in the intestinal mucosa, which causes serious damage and which may open access for gut microorganisms through the intestinal tissue. The immune-regulatory processes taking place during the evolution of the chronic infection are still not completely understood. By use of the Swiss Webster outbred mouse model, mice were infected with 200 eggs, and tolerance to the establishment of a chronic Trichuris muris infection was induced by the administration of a short pulse of dexamethasone during nematode early larval development. The infected mice presented weight loss, anemia, an imbalance of the microbiota, and intense immunological cell infiltration in the large intestine. It was found that mice have a mixed Th1/Th2/Th17 response, with differences being found among the different anatomical locations. After 45 days of infection, the parasitism induced changes in the microbiota composition and bacterial invasion of the large intestine epithelium. In addition, we describe that the excretory-secretory products from the nematode have anti-inflammatory effects on mouse macrophages cultured in vitro, suggesting that T. muris may modulate the immune response at the site of insertion of the worm inside mouse tissue. The data presented in this study suggest that the host immune state at 45 days postinfection with T. muris during the chronic phase of infection is the result of factors derived from the worm as well as alterations to the microbiota and bacterial invasion. Taken together, these results provide new information about the parasite-host-microbiota relationship and open new treatment possibilities.

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Fasciola hepatica reinfection potentiates a mixed Th1/Th2/Th17/Treg response and correlates with the clinical phenotypes of anemia

Cited by 39 publications

References 93 publications

Sheep and Cattle Reservoirs in the Highest Human Fascioliasis Hyperendemic Area: Experimental Transmission Capacity, Field Epidemiology, and Control Within a One Health Initiative in Bolivia

Sheep and Cattle Reservoirs in the Highest Human Fascioliasis Hyperendemic Area: Experimental Transmission Capacity, Field Epidemiology, and Control Within a One Health Initiative in Bolivia

Dynamic expression of cytokine and transcription factor genes during experimental Fasciola gigantica infection in buffaloes

Whipworm Infection Promotes Bacterial Invasion, Intestinal Microbiota Imbalance, and Cellular Immunomodulation

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