کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8259984 | 1534653 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ghrelin inhibits BSCB disruption/hemorrhage by attenuating MMP-9 and SUR1/TrpM4 expression and activation after spinal cord injury
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کلمات کلیدی
iNOSVPABSCBi.pMMPTRPM4COX-2GHS-R1aTNFSUR1 - sur1Spinal cord injury - آسیب نخاعیTight junction - اتصال تنگinterleukin - اینترلوکینHemorrhage - خونریزیintraperitoneal - داخل صفاقیBBB - سد خونی مغزیinducible nitric oxide synthase - سنتاز اکسید نیتریک القاییCyclooxygenase-2 - سیکلوکوکسیژناز2sci - علمیtumor necrosis factor - فاکتور نکروز تومورMatrix metalloprotease - ماتریکس متیل پروتئازایBlood-brain barrier - مانع خون مغزیBlood spinal cord barrier - مانع طناب نخاعی خونValproic acid - والپروات و والپروات سدیم یا والپروئیک اسیدGhrelin - گرلینsulfonylurea receptor 1 - گیرنده سولفونیل اوره 1Ghrelin receptor - گیرنده گرلین
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Blood spinal cord barrier (BSCB) disruption after spinal cord injury (SCI) leads to secondary injury and results in apoptosis of neurons and glia, leading to permanent neurological deficits. Here, we examined the effect of ghrelin on BSCB breakdown and hemorrhage after SCI. After moderate weight-drop contusion injury at T9 spinal cord, ghrelin (80 μg/kg) was administered via intraperitoneal injection immediately after SCI and then the same dose of ghrelin was treated every 6 h for 1 d. Our data showed that ghrelin treatment significantly inhibited the expression and activation of matrix metalloprotease-9 (MMP-9) at 1 d after SCI. The increases of sulfonylurea receptor 1 (SUR1) and transient receptor potential melastatin 4 (TrpM4) expressions at 1 h and 8 h after SCI respectively were also alleviated by ghrelin treatment. In addition, both BSCB breakdown and hemorrhage at 1 d after injury were significantly attenuated by ghrelin. In parallel, the infiltration of blood cells such as neutrophils and macrophages was inhibited by ghrelin treatment at 1 d and 5 d after SCI respectively. We also found that ghrelin receptor, growth hormone secretagogue receptor-1a (GHS-R1a), was expressed in the blood vessel of normal spinal tissue. Furthermore, the inhibitory effects of ghrelin on hemorrhage and BSCB disruption at 1 d after SCI were blocked by GHS-R1a antagonist, [D-Lys-3]-GHRP-6 (3 mg/kg). Thus, these results indicate that the neuroprotective effect by ghrelin after SCI is mediated in part by blocking BSCB disruption and hemorrhage through the down-regulation of SUR1/TrpM4 and MMP-9, which is dependent on GHS-R1a.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease - Volume 1842, Issue 12, Part A, December 2014, Pages 2403-2412
Journal: Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease - Volume 1842, Issue 12, Part A, December 2014, Pages 2403-2412
نویسندگان
Jee Y. Lee, Hae Y. Choi, Won H. Na, Bong G. Ju, Tae Y. Yune,