Behavioral Improvement and Regulation of Molecules Related to Neuroplasticity in Ischemic Rat Spinal Cord Treated with PEDF
نویسندگان
چکیده
Pigment epithelium derived factor (PEDF) exerts trophic actions to motoneurons and modulates nonneuronal restorative events, but its effects on neuroplasticity responses after spinal cord (SC) injury are unknown. Rats received a low thoracic SC photothrombotic ischemia and local injection of PEDF and were evaluated behaviorally six weeks later. PEDF actions were detailed in SC ventral horn (motor) in the levels of the lumbar central pattern generator (CPG), far from the injury site. Molecules related to neuroplasticity (MAP-2), those that are able to modulate such event, for instance, neurotrophic factors (NT-3, GDNF, BDNF, and FGF-2), chondroitin sulfate proteoglycans (CSPG), and those associated with angiogenesis and antiapoptosis (laminin and Bcl-2) and Eph (receptor)/ephrin system were evaluated at cellular or molecular levels. PEDF injection improved motor behavioral performance and increased MAP-2 levels and dendritic processes in the region of lumbar CPG. Treatment also elevated GDNF and decreased NT-3, laminin, and CSPG. Injury elevated EphA4 and ephrin-B1 levels, and PEDF treatment increased ephrin A2 and ephrins B1, B2, and B3. Eph receptors and ephrins were found in specific populations of neurons and astrocytes. PEDF treatment to SC injury triggered neuroplasticity in lumbar CPG and regulation of neurotrophic factors, extracellular matrix molecules, and ephrins.
منابع مشابه
Effects of Valproic Acid, a Histone Deacetylase Inhibitor, on improvement of Locomotor Function in Rat Spinal Cord Injury Based on Epigenetic Science
Background: The primary phase of traumatic spinal cord injury (SCI) starts by a complex local inflammatory reaction such as secretion of pro-inflammatory cytokines from microglia and injured cells that substantially contribute to exacerbating pathogenic events in secondary phase. Valproic acid (VPA) is a histone deacetylase inhibitor. Acetylation of histones is critical to cellular inflammatory...
متن کاملThe Effect of Reperfusion after Short Time Ischemic on Spinal Cord on Rat
Introduction: Ischemia plays an important role in the development of pathologic in various neuropathies, and reperfusion improves the pathological and physiological abnormalities of ischemic nerves. In this study, the effect of shortreperfusion time after short time ischemic on spinal cord of rat was investigated. Methods: Eighteen rats (Sprague-Dawley, 250-350 g), were divided into 3 groups: g...
متن کاملIntrathecal Amylin and Salmon Calcitonin Affect Formalin Induced c-Fos Expression in the Spinal Cord of Rats
Background: Amylin and Salmon Calcitonin belong to the calcitonin family of peptides and have high affinity binding sites in the rat spinal cord. The aim of this study was to characterize receptors for Amylin and Salmon Calcitonin functionally in the spinal cord of rats. We assessed the expression of c-Fos in response to intraplantar formalin in the lumbar regions of the spinal cord in consciou...
متن کاملبررسی اثر ضد آپوپتوزی والپروئیک اسید در مدل موشی ضایعه نخاعی
Background and Objective: Spinal cord injury (SCI) leads to the loss of axons and cell death via necrosis and apoptosis, eventually resulting in sensory and motor dysfunction. The aim of this study was to evaluate the effects of valproic acid on the inhibition of apoptosis and the improvement of motor function in the rat model of spinal cord injury. Materials and Methods: Contusion model was u...
متن کاملThe Effect of Aerobic Exercise and Melatonin on COX-2 Gene Expression in Spinal Cord Tissue and Neuropathic Pain Behavioral Responses in a Diabetic Rat Model
Introduction: Neuroinflammation plays an important role in developing many neurological changes in diabetic patients. This study aimed to investigate the effect of aerobic exercise and melatonin on COX-2 expression in spinal cord tissue and behavioral responses to pain caused by diabetic neuropathy in a rat model. Materials and Methods: Forty eight-week-old male Wistar rats (weight range 204 ± ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
دوره 2014 شماره
صفحات -
تاریخ انتشار 2014