کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2493972 1115538 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Augmentation of immune response by chicoric acid through the modulation of CD28/CTLA-4 and Th1 pathway in chronically stressed mice
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Augmentation of immune response by chicoric acid through the modulation of CD28/CTLA-4 and Th1 pathway in chronically stressed mice
چکیده انگلیسی

This study demonstrates the protective effect of chicoric acid (CA) on chronic restraint stress-induced altered T lymphocyte subset distribution and corresponding cytokine secretion patterns in experimental Swiss albino mice. CA has the potential to restore diminished immune response and Th1/Th2 homeostasis in chronically stressed mice as evident by significant increase in lymphocyte proliferation and CD3+, CD4+ and CD8+ T cell population. Interestingly, chicoric acid imparted immunostimulation mainly by upregulating the expression of CD28 and CD80 and downregulating CTLA-4. It exerted stimulatory effect on IL-12, IFN-gamma and IL-2 and suppressed the increased IL-10 levels in chronically stressed mice. It also exhibited a significant lowering effect on raised corticosterone levels and reversed the chronic stress-induced hypertrophy of adrenal glands and atrophy of thymus and spleen, thereby showing its normalizing effect on HPA axis. Our results reveal that CA has the potential to reverse the impact of chronic restraint stress on immune status by normalizing corticosterone levels and augmenting Th1 cytokine profile along with the co-stimulatory molecules particularly CD28/CTLA-4 pathway that plays a very important role in generation of an effective immune response in immune compromised situations.


► The study demonstrates the immune restorative potential of CA in chronically stressed mice.
► Our study reports categorically that CA restores immune response in chronically stressful conditions by modulating the expression of CD28/CTLA-4 receptor on T cells with its ligand B7 that are necessary for the activation/inhibition of T cells.
► CA also upregulates the expression of Th1 cytokines like IL-2, IFN-gamma and IL-12 in chronic stressed conditions.
► The study also shows the normalizing effect of CA on raised corticosterone levels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 60, Issue 6, May 2011, Pages 852–860
نویسندگان
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