Academic Journal
Cytokine Control of the Granulomatous Response in Schistosoma mansoni-Infected Baboons: Role of Exposure and Treatment
| العنوان: | Cytokine Control of the Granulomatous Response in Schistosoma mansoni-Infected Baboons: Role of Exposure and Treatment |
|---|---|
| المؤلفون: | Mola, Paul W., Farah, Idle O., Kariuki, Thomas M., Nyindo, Mramba, Blanton, Ronald E., King, Christopher L. |
| المساهمون: | Moore, R. N. |
| المصدر: | Infection and Immunity ; volume 67, issue 12, page 6565-6571 ; ISSN 0019-9567 1098-5522 |
| بيانات النشر: | American Society for Microbiology |
| سنة النشر: | 1999 |
| الوصف: | Variations in exposure and treatment may contribute to heterogeneity in immunity and granuloma-induced pathology in human schistosomiasis. To examine this hypothesis, olive baboons were either repeatedly infected with Schistosoma mansoni cercariae or received an equivalent dose in a single infection. They were then cured with praziquantel and reinfected with a single exposure. Serial liver biopsies were obtained throughout the course of the experiment, and cytokine responses by peripheral blood mononuclear cells were measured every 2 to 3 weeks. Reinfection after treatment resulted in a twofold-smaller granuloma size at 6 and 9 weeks after infection compared to the size for the same period after primary infection ( P < 0.001) but had no effect at 16 or 19 weeks postinfection. The pattern of exposure did not influence granuloma size. During primary infection schistosome-soluble egg antigen (SEA)-induced cytokine production correlated with granulomatous inflammation. Cytokine levels peaked during the acute infection, declined with chronic infection, and became undetectable after treatment. Reinfection after treatment stimulated a two- to three-fold increase in SEA-specific interleukin-4 (IL-4), IL-5, IL-10, IL-2, and transforming growth factor β (TGF-β) production and a marked rise in SEA-specific immunoglobulin E (IgE) and IgG regardless of the type of exposure. Cytokine production was significantly greater in repeatedly exposed animals ( P < 0.001). SEA-induced gamma interferon production, however, did not increase with reinfection after treatment. SEA-induced TGF-β was the only cytokine that remained elevated as the infection become chronic and correlated with diminished hepatic granuloma size, implying its participation in down-modulation. These studies demonstrate that baboons partially retain their ability to down-modulate the granulomatous response after treatment. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1128/iai.67.12.6565-6571.1999 |
| DOI: | 10.1128/IAI.67.12.6565-6571.1999 |
| الاتاحة: | http://dx.doi.org/10.1128/iai.67.12.6565-6571.1999 https://journals.asm.org/doi/pdf/10.1128/IAI.67.12.6565-6571.1999 |
| Rights: | https://journals.asm.org/non-commercial-tdm-license |
| رقم الانضمام: | edsbas.B48F505D |
| قاعدة البيانات: | BASE |
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