Schistosoma mansoni and alpha-galactosylceramide: prophylactic effect of Th1 Immune suppression in a mouse model of Graves' hyperthyroidism.

نویسندگان

  • Yuji Nagayama
  • Kanji Watanabe
  • Masami Niwa
  • Sandra M McLachlan
  • Basil Rapoport
چکیده

Graves' hyperthyroidism, an organ-specific autoimmune disease mediated by stimulatory thyrotropin receptor (TSHR) autoantibodies, has been considered a Th2-dominant disease. However, recent data with mouse Graves' models are conflicting. For example, we recently demonstrated that injection of BALB/c mice with adenovirus coding the TSHR induced Graves' hyperthyroidism characterized by mixed Th1 and Th2 immune responses against the TSHR, and that transient coexpression of the Th2 cytokine IL-4 by adenovirus skewed Ag-specific immune response toward Th2 and suppressed disease induction. To gain further insight into the relationship between immune polarization and Graves' disease, we evaluated the effect of Th2 immune polarization by helminth Schistosoma mansoni infection and alpha-galactosylceramide (alpha-GalCer), both known to bias the systemic immune response to Th2, on Graves' disease. S. mansoni infection first induced mixed Th1 and Th2 immune responses to soluble worm Ags, followed by a Th2 response to soluble egg Ags. Prior infection with S. mansoni suppressed the Th1-type anti-TSHR immune response, as demonstrated by impaired Ag-specific IFN-gamma secretion of splenocytes and decreased titers of IgG2a subclass anti-TSHR Abs, and also prevented disease development. Similarly, alpha-GalCer suppressed Ag-specific splenocyte secretion of IFN-gamma and prevented disease induction. However, once the anti-TSHR immune response was fully induced, S. mansoni or alpha-GalCer was ineffective in curing disease. These data support the Th1 theory in Graves' disease and indicate that suppression of the Th1-type immune response at the time of Ag priming may be crucial for inhibiting the pathogenic anti-TSHR immune response.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Schistosoma mansoni and -Galactosylceramide: Prophylactic Effect of Th1 Immune Suppression in a Mouse Model of Graves’ Hyperthyroidism

متن کامل

Antioxidant effects of gold nanoparticles on Schistosoma mansoni induced granuloma, in vitro

Objective(s): Schistosomiasis and hepatitis C virus [HCV] co-infection is common among the Egyptian population. Co-infected patients have higher rate of chronic hepatitis, cirrhosis and hepatocellular carcinoma. The aim of the present study was to investigate the potential role of gold nanoparticles on granuloma in vitro. Materials and Methods: In the current study, granulocytes were isolated f...

متن کامل

Altered immune responses in mice with concomitant Schistosoma mansoni and Plasmodium chabaudi infections.

Mixed parasitic infections are common in many parts of the world. However, little is known about how concurrent infections affect the immunity to and/or pathogenesis of each other. Protection and elimination of blood-stage Plasmodium chabaudi chabaudi AS in resistant mice are characterized by a sequential activation of CD4(+) Th1 and Th2 cells. The patent egg-laying stage of the murine model of...

متن کامل

Inhibition of Hepatitis B Virus Replication during Schistosoma mansoni Infection in Transgenic Mice

Although coinfection of hepatitis B virus (HBV) and Schistosoma mansoni is a frequent event in humans, little is known about the interactions between these two pathogens. S. mansoni infection induces T helper cell type 2 (Th2)-type cytokines in the liver of humans and mice. The intrahepatic induction of nitric oxide (NO) and Th1-type cytokines, such as interferon (IFN)-gamma and IFN-alpha/beta,...

متن کامل

Inhibition of Granulomatous Inflammation and Prophylactic Treatment of Schistosomiasis with a Combination of Edelfosine and Praziquantel

BACKGROUND Schistosomiasis is the third most devastating tropical disease worldwide caused by blood flukes of the genus Schistosoma. This parasitic disease is due to immunologic reactions to Schistosoma eggs trapped in tissues. Egg-released antigens stimulate tissue-destructive inflammatory and granulomatous reactions, involving different immune cell populations, including T cells and granulocy...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of immunology

دوره 173 3  شماره 

صفحات  -

تاریخ انتشار 2004