The complexity of substance P-mediated mast cell activation

The neuropeptide substance P mediates adventitial mast cell activation and induces intraplaque hemorrhage in advanced atherosclerosis.

RATIONALE Although we and others have recently shown that mast cells play an important role in plaque progression and destabilization, the nature of the actual trigger for (peri)vascular mast cell activation during atherosclerosis is still unresolved. OBJECTIVE In this study, we confirm that perivascular mast cell content correlates with the number of nerve fibers in the adventitia of human c...

Comparison of the inhibitory effects of resveratrol and tranilast on IgE, 48/80 and substance P dependent-mast cell activation

Results In LAD2 cells, both resveratrol and tranilast (10 ug/ml) inhibited degranulation induced by mast cell activators IgE/anti-IgE (39% and 19%, respectively; P<0.03), compound 48/80 (9% and 6%), and substance P (23% and 28%; P<0.03). This may be attributable to modulation of Ca levels, as resveratrol, and to a lesser extent tranilast, attenuated substance P-dependent increases in [Ca]i. Res...

Mast cell production of TNF-alpha induced by substance P evidence for a modulatory role of substance P-antagonists.

Unregulated increasing of Tumor necrosis factor-alpha (TNF-alpha) could be pathogenic in inflammatory diseases. The aim of this study was to investigate the anti-inflammatory role of the Substance P-antagonists (SPAs) through the inhibition of histamine release (HR) and TNF-alpha production from mast cell. Rat peritoneal mast cells (PMC) stimulated with Substance P (SP), in the presence of SPAs...

the effect of task complexity on lexical complexity and grammatical accuracy of efl learners’ argumentative writing

بر اساس فرضیه شناخت رابینسون (2001 و 2003 و 2005) و مدل ظرفیت توجه محدود اسکهان (1998)، این تحقیق تاثیر پیچیدگی تکلیف را بر پیچیدگی واژگان و صحت گرامری نوشتار مباحثه ای 60 نفر از دانشجویان زبان انگلیسی بررسی کرد. میزان پیچیدگی تکلیف از طریق فاکتورهای پراکندگی-منابع تعیین شد. همه ی شرکت کنندگان به صورت نیمه تصادفی به یکی از سه گروه: (1) گروه موضوع، (2) گروه موضوع + اندیشه و (3) گروه موضوع + اندی...

Cell Activation Calpain-1 Contributes to IgE-Mediated Mast