کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10815902 | 1058525 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
PKA and actin play critical roles as downstream effectors in MRP4-mediated regulation of fibroblast migration
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کلمات کلیدی
RACWASPpKaSPTMEFsMRP4VASPactin - اکتین Vasodilator-stimulated phosphoprotein - فسفوپروتئین تحریک شده با واسوادولاتورmouse embryo fibroblasts - فیبروبلاست جنین موشMigration - مهاجرتCyclic nucleotides - نوکلئوتید سیکلRAS-related C3 botulinum toxin substrate - وابسته به RAS وابسته به سم بوتولینوم توکسینMultidrug resistance protein 4 - پروتئین مقاومتی چندین رژیم 4protein kinase A - پروتئین کیناز ASingle-particle tracking - پیگیری تک ذرات
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Multidrug resistance protein 4 (MRP4), a member of the ATP binding cassette transporter family, functions as a plasma membrane exporter of cyclic nucleotides. Recently, we demonstrated that fibroblasts lacking the Mrp4 gene migrate faster and contain higher cyclic-nucleotide levels. Here, we show that cAMP accumulation and protein kinase A (PKA) activity are higher and polarized in Mrp4â/â fibroblasts, versus Mrp4+/+ cells. MRP4-containing macromolecular complexes isolated from these fibroblasts contained several proteins, including actin, which play important roles in cell migration. We found that actin interacts with MRP4, predominantly at the plasma membrane, and an intact actin cytoskeleton is required to restrict MRP4 to specific microdomains of the plasma membrane. Our data further indicated that the enhanced accumulation of cAMP in Mrp4â/â fibroblasts facilitates cortical actin polymerization in a PKA-dependent manner at the leading edge, which in turn increases the overall rate of cell migration to accelerate the process of wound healing. Disruption of actin polymerization or inhibition of PKA activity abolished the effect of MRP4 on cell migration. Together, our findings suggest a novel cAMP-dependent mechanism for MRP4-mediated regulation of fibroblast migration whereby PKA and actin play critical roles as downstream effectors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cellular Signalling - Volume 27, Issue 7, July 2015, Pages 1345-1355
Journal: Cellular Signalling - Volume 27, Issue 7, July 2015, Pages 1345-1355
نویسندگان
Chandrima Sinha, Aixia Ren, Kavisha Arora, Chang Suk Moon, Sunitha Yarlagadda, Koryse Woodrooffe, Songbai Lin, John D. Schuetz, Assem G. Ziady, Anjaparavanda P. Naren,