کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2831979 1163821 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-silico cell surface modeling reveals mechanism for initial steps of B-cell receptor signal transduction
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
In-silico cell surface modeling reveals mechanism for initial steps of B-cell receptor signal transduction
چکیده انگلیسی

Ligand binding to B-cell receptors (BcRs) on the B-cell surface induces crosslinking and phosphorylation of BCRs by the Src family kinases, followed by initiation of signaling. Although the nature of the earliest events following receptor engagement is currently under intensive investigation, the precise connection between crosslinking and the signaling cascade triggering has thus far remained unclear.Using a novel multiscale, agent-based simulation of B-cell surface dynamics, we present a coherent quantitative analysis of the initial stages of B-cell activation following ligand presentation. The simulation reproduces experimental results of H3 uptake, immunoglobulin secretion, immunoelectron photomicrography and FRET. While merging multiple experimental techniques, the simulation captures all essential events in the first twenty seconds following ligand presentation, and is used to make predictions on subsequent molecular events. We show that B-cell activation is mediated through a positive feedback loop between Lyn and ITAM phosphorylation, but that specificity is achieved through a combination of BcR spatial segregation and BcR selective partitioning within lipid rafts following clustering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 46, Issue 15, September 2009, Pages 3141–3150
نویسندگان
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