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Effect of sildenafil on neuroinflammation and synaptic plasticity pathways in experimental autoimmune encephalomyelitis.
International Immunopharmacology ( IF 4.8 ) Pub Date : 2020-05-19 , DOI: 10.1016/j.intimp.2020.106581
Shyrlene Meiry da Rocha Araújo 1 , Eduardo Duarte-Silva 2 , Crislayne Gonçalo de Santana Marinho 3 , Wilma Helena Oliveira 1 , Maria Eduarda Rocha de França 1 , Deniele Lós 4 , Gabriela Peron 5 , Livia Tomaz 5 , Amanda Pires Bonfanti 5 , Liana Verinaud 5 , Christina Alves Peixoto 6
Affiliation  

Multiple sclerosis (MS) is a chronic immuno-inflammatory disease of the central nervous system characterized by demyelination and axonal damage. Cognitive changes are common in individuals with MS since inflammatory molecules secreted by microglia interfere with the physiological mechanisms of synaptic plasticity. According to previous data, inhibition of PDE5 promotes the accumulation of cGMP, which inhibits neuroinflammation and seems to improve synaptic plasticity and memory. The present study aimed to evaluate the effect of sildenafil on the signaling pathways of neuroinflammation and synaptic plasticity in experimental autoimmune encephalomyelitis (EAE). C57BL/6 mice were divided into three experimental groups (n = 10/group): (a) Control; (b) EAE; (c) EAE + sild (25 mg/kg/21 days). Sildenafil was able to delay the onset and attenuate the severity of the clinical symptoms of EAE. The drug also reduced the infiltration of CD4+ T lymphocytes and their respective IL-17 and TNF-α cytokines. Moreover, sildenafil reduced neuroinflammation in the hippocampus (assessed by the reduction of inflammatory markers IL-1β, pIKBα and pNFkB and reactive gliosis, as well as elevating the inhibitory cytokines TGF-β and IL-10). Moreover, sildenafil induced increased levels of NeuN, BDNF and pCREB, protein kinases (PKA, PKG, and pERK) and synaptophysin, and modulated the expression of the glutamate receptors AMPA and NMDA. The present findings demonstrated that sildenafil has therapeutic potential for cognitive deficit associated with multiple sclerosis.



中文翻译:

西地那非对实验性自身免疫性脑脊髓炎的神经炎症和突触可塑性通路的影响。

多发性硬化症(MS)是中枢神经系统的慢性免疫炎症性疾病,其特征在于脱髓鞘和轴突损伤。由于小胶质细胞分泌的炎性分子干扰了突触可塑性的生理机制,因此认知障碍在MS患者中很常见。根据以前的数据,抑制PDE5会促进cGMP的积累,从而抑制神经炎症并似乎改善突触的可塑性和记忆力。本研究旨在评估西地那非对实验性自身免疫性脑脊髓炎(EAE)中神经炎症和突触可塑性信号通路的影响。将C57BL / 6小鼠分为三个实验组(n = 10 /组):(b)阿拉伯联合酋长国;(c)EAE +淤泥(25 mg / kg / 21天)。西地那非能够延迟发作并减轻EAE临床症状的严重性。该药物还减少了CD4 + T淋巴细胞及其各自的IL-17和TNF-α细胞因子的浸润。此外,西地那非可减少海马中的神经炎症(通过减少炎症标志物IL-1β,pIKBα和pNFkB以及反应性神经胶质增生,以及增加抑制性细胞因子TGF-β和IL-10来评估)。此外,西地那非可诱导增加NeuN,BDNF和pCREB,蛋白激酶(PKA,PKG和pERK)和突触素的水平,并调节谷氨酸受体AMPA和NMDA的表达。目前的发现表明西地那非具有治疗与多发性硬化症相关的认知缺陷的潜力。该药物还减少了CD4 + T淋巴细胞及其各自的IL-17和TNF-α细胞因子的浸润。此外,西地那非可减少海马中的神经炎症(通过减少炎症标志物IL-1β,pIKBα和pNFkB以及反应性神经胶质增生,以及增加抑制性细胞因子TGF-β和IL-10来评估)。此外,西地那非可诱导增加NeuN,BDNF和pCREB,蛋白激酶(PKA,PKG和pERK)和突触素的水平,并调节谷氨酸受体AMPA和NMDA的表达。目前的发现表明西地那非具有治疗与多发性硬化症相关的认知缺陷的潜力。该药物还减少了CD4 + T淋巴细胞及其各自的IL-17和TNF-α细胞因子的浸润。此外,西地那非可减少海马中的神经炎症(通过减少炎症标志物IL-1β,pIKBα和pNFkB以及反应性神经胶质增生,以及增加抑制性细胞因子TGF-β和IL-10来评估)。此外,西地那非可诱导增加NeuN,BDNF和pCREB,蛋白激酶(PKA,PKG和pERK)和突触素的水平,并调节谷氨酸受体AMPA和NMDA的表达。目前的发现表明西地那非具有治疗与多发性硬化症相关的认知缺陷的潜力。pIKBα和pNFkB与反应性神经胶质增生,以及升高抑制性细胞因子TGF-β和IL-10)。此外,西地那非可诱导增加NeuN,BDNF和pCREB,蛋白激酶(PKA,PKG和pERK)和突触素的水平,并调节谷氨酸受体AMPA和NMDA的表达。目前的发现表明西地那非具有治疗与多发性硬化症相关的认知缺陷的潜力。pIKBα和pNFkB与反应性神经胶质增生,以及升高抑制性细胞因子TGF-β和IL-10)。此外,西地那非可诱导增加NeuN,BDNF和pCREB,蛋白激酶(PKA,PKG和pERK)和突触素的水平,并调节谷氨酸受体AMPA和NMDA的表达。本研究结果表明西地那非具有治疗多发性硬化症相关认知功能障碍的潜力。

更新日期:2020-05-19
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