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https://www.readbyqxmd.com/read/28300551/role-of-caveolin-1-vascular-endothelial-growth-factor-pathway-in-basic-fibroblast-growth-factor-induced-angiogenesis-and-neurogenesis-after-treadmill-training-following-focal-cerebral-ischemia-in-rats
#1
Qiongyi Pang, Huimei Zhang, Zhenzhen Chen, Yudan Wu, Min Yidian Bai Liu, Yun Zhao, Fengxia Tu, Chan Liu, Xiang Chen
Exercise is known to aid functional recovery following ischemia, though the mechanisms responsible for the beneficial effects of exercise on recovery from ischemic stroke are not fully understood. Basic fibroblast growth factor (bFGF) contributes to angiogenesis and promotes neurologic functional recovery after stroke. The present study aimed to investigate the possible mechanisms whereby treadmill exercise ameliorated impaired angiogenesis and neurogenesis following transient cerebral ischemia in middle cerebral artery occlusion (MCAO) rats...
March 11, 2017: Brain Research
https://www.readbyqxmd.com/read/28288870/tia-model-is-attainable-in-wistar-rats-by-intraluminal-occlusion-of-the-mca-for-10-min-or-shorter
#2
A Durukan Tolvanen, E Tatlisumak, E Pedrono, U Abo-Ramadan, T Tatlisumak
Transient ischemic attack (TIA) has received only little attention in the experimental research field. Recently, we introduced a TIA model for mice, and here we set similar principles for simulating this human condition in Wistar rats. In the model: 1) transient nature of the event is ensured, and 2) 24 h after the event animals are free from any sensorimotor deficit and from any detectable lesion by magnetic resonance imaging (MRI). Animals experienced varying durations of ischemia (5, 10, 12.5, 15, 25, and-30 min, n=6-8 per group) by intraluminal middle cerebral artery occlusion (MCAO)...
March 10, 2017: Brain Research
https://www.readbyqxmd.com/read/28264448/paeoniflorin-attenuates-cerebral-ischemia-induced-injury-by-regulating-ca-2-camkii-creb-signaling-pathway
#3
Yuqin Zhang, Lifei Qiao, Wen Xu, Xiaoying Wang, Huang Li, Wei Xu, Kedan Chu, Yu Lin
Paeoniflorin (PF) is an active ingredient of Paeoniae Radix which possesses the neuroprotective effect. However, so far, the neuroprotective mechanism of PF has still not been fully uncovered. The Ca(2+)/Ca(2+)/calmodulin-dependent protein kinase II (CaMKII)/cAMP response element-binding (CREB) signaling pathway plays an important role in the intracellular signal transduction pathway involved in cell proliferation, cell survival, inflammation and metabolism. Herein, the neuroprotective roles of PF in the models of middle cerebral artery occlusion (MCAO) followed by reperfusion in rats and N-methyl-d-aspartic acid (NMDA)-induced excitotoxicity in primary hippocampal neurons were investigated...
February 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28257891/combined-metabolic-and-transcriptional-profiling-identifies-pentose-phosphate-pathway-activation-by-hsp27-phosphorylation-during-cerebral-ischemia
#4
Taichiro Imahori, Kohkichi Hosoda, Tomoaki Nakai, Yusuke Yamamoto, Yasuhiro Irino, Masakazu Shinohara, Naoko Sato, Takashi Sasayama, Kazuhiro Tanaka, Hiroaki Nagashima, Masaaki Kohta, Eiji Kohmura
The metabolic pathophysiology underlying ischemic stroke remains poorly understood. To gain insight into these mechanisms, we performed a comparative metabolic and transcriptional analysis of the effects of cerebral ischemia on the metabolism of the cerebral cortex using middle cerebral artery occlusion (MCAO) rat model. Metabolic profiling by gas-chromatography/mass-spectrometry analysis showed clear separation between the ischemia and control group. The decreases of fructose 6-phosphate and ribulose 5-phosphate suggested enhancement of the pentose phosphate pathway (PPP) during cerebral ischemia (120-min MCAO) without reperfusion...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28257582/osthole-prevents-cerebral-ischemia-reperfusion-injury-via-notch-signaling-pathway
#5
Junhong Guan, Xiangtai Wei, Shengtao Qu, Tao Lv, Qiang Fu, Ye Yuan
Stroke is a common cerebrovascular disease in aged population with the second leading mortality and the leading cause of permanent disability, and the ischemic stroke is the primary form. Osthole is a coumarin derivative extracted from the fruits of Cnidium monnieri (Linn.) Cuss. In this study, we established the rat middle cerebral artery occlusion/reperfusion (MCAO/R) model in vivo, and found that MCAO/R caused cerebral infarction, hippocampus neuronal injury and apoptosis, and also activated the Notch 1 signaling pathway...
March 3, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28251683/limb-remote-ischemic-postconditioning-induced-elevation-of-fibulin-5-confers-neuroprotection-to-rats-with-cerebral-ischemia-reperfusion-injury-activation-of-the-akt-pathway
#6
Wei Zhang, Ye Wang, Guorong Bi
Limb remote ischemic postconditioning (RIPostC) is an effective and well-acknowledged treatment for brain ischemia injury. The present study aimed to evaluate the role of fibulin-5 in the neuroprotection of RIPostC against cerebral ischemia/reperfusion (I/R) injury in rats. The middle cerebral artery occlusion (MCAO) model was established in rats and then RIPostC was carried out by 3 cycles of 10 min occlusion/10 min release of the bilateral femoral artery at the beginning of the reperfusion. To downregulate the fibulin-5 level, fibulin-5 siRNA was injected into the lateral ventricle 24 h before MCAO...
March 2, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28236211/%C3%AE-caryophyllene-pretreatment-alleviates-focal-cerebral-ischemia-reperfusion-injury-by-activating-pi3k-akt-signaling-pathway
#7
Qian Zhang, Ruidi An, Xiaocui Tian, Mei Yang, Minghang Li, Jie Lou, Lu Xu, Zhi Dong
β-Caryophyllene (BCP) has been reported to be protective against focal cerebral ischemia-reperfusion (I/R) injury by its anti-oxidative and anti-inflammatory features. Recent study demonstrates that the BCP exhibits potential neuroprotection against I/R injury induced apoptosis, however, the mechanism remains unknown. Therefore, we investigate the underlying anti-apoptotic mechanism of BCP pretreatment in I/R injury. Sprague-Dawley rats (pretreated with BCP suspensions or solvent orally for 7 days) were subjected to transient Middle Cerebral Artery Occlusion (MCAO) for 90 min, followed by 24 h reperfusion...
February 24, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28203483/galanin-protects-from-caspase-8-12-initiated-neuronal-apoptosis-in-the-ischemic-mouse-brain-via-galr1
#8
Yun Li, Zhu Mei, Shuiqiao Liu, Tong Wang, Hui Li, Xiao-Xiao Li, Song Han, Yutao Yang, Junfa Li, Zhi-Qing David Xu
Galanin (GAL) plays key role in many pathophysiological processes, but its role in ischemic stroke remains unclear. Here, the models of 1 h middle cerebral artery occlusion (MCAO)/1-7 d reperfusion (R)-induced ischemic stroke and in vitro cell ischemia of 1 h oxygen-glucose deprivation (OGD)/24 h reoxygenation in primary cultured cortical neurons were used to explore GAL's effects and its underlying mechanisms. The results showed significant increases of GAL protein levels in the peri-infarct region (P) and infarct core (I) within 48 h R of MCAO mice (p<0...
February 2017: Aging and Disease
https://www.readbyqxmd.com/read/28190474/salvianolic-acid-a-inhibits-calpain-activation-and-enos-uncoupling-during-focal-cerebral-ischemia-in-mice
#9
Qaisar Mahmood, Guang-Fa Wang, Gang Wu, Huan Wang, Chang-Xin Zhou, Hong-Yu Yang, Zhi-Rong Liu, Feng Han, Kui Zhao
BACKGROUND: Salvianolic acid A (SAA) is obtained from Chinese herb Salviae Miltiorrhizae Bunge (Labiatae), has been reported to have the protective effects against cardiovascular and neurovascular diseases. HYPOTHESIS: The aim of present study was to investigate the relationship between the effectiveness of SAA against neurovascular injury and its effects on calpain activation and endothelial nitric oxide synthase (eNOS) uncoupling. STUDY DESIGN: SAA or vehicle was given to C57BL/6 male mice for seven days before the occlusion of middle cerebral artery (MCAO) for 60min...
February 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28186440/britanin-ameliorates-cerebral-ischemia-reperfusion-injury-by-inducing-the-nrf2-protective-pathway
#10
Guozhen Wu, Lili Zhu, Xing Yuan, Hao Chen, Rui Xiong, Shoude Zhang, Hao Cheng, Yunheng Shen, Huazhang An, Tiejun Li, Honglin Li, Weidong Zhang
AIMS: Oxidative stress is considered the major cause of tissue injury after cerebral ischemia. The nuclear factor erythroid 2-related factor 2 (Nrf2) pathway is one of the most important defensive mechanisms against oxidative stresses and has been confirmed as a target for stroke treatment. Thus, we desired to find new Nrf2 activators and test their neuronal protective activity both in vivo and in vitro. RESULTS: The herb-derived compound, Britanin, is a potent inducer of the Nrf2 system...
March 9, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28178380/pre-ischemia-melatonin-treatment-alleviated-acute-neuronal-injury-after-ischemic-stroke-by-inhibiting-endoplasmic-reticulum-stress-dependent-autophagy-via-perk-and-ire1-signalings
#11
Dayun Feng, Bao Wang, Lei Wang, Neeta Abraham, Kai Tao, Lu Huang, Wei Shi, Yushu Dong, Yan Qu
Melatonin has demonstrated a potential protective effect in central nervous system. Thus, it is interesting to determine whether pre-ischemia melatonin administration could protect against cerebral ischemia/reperfusion (IR)-related injury and the underlying molecular mechanisms. In this study, we revealed that IR injury significantly activated endoplasmic reticulum (ER) stress and autophagy in a middle cerebral artery occlusion mouse model. Pre-ischemia melatonin treatment was able to attenuate IR-induced ER stress and autophagy...
February 8, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28178289/eupatilin-exerts-neuroprotective-effects-in-mice-with-transient-focal-cerebral-ischemia-by-reducing-microglial-activation
#12
Arjun Sapkota, Bhakta Prasad Gaire, Kyu Suk Cho, Se Jin Jeon, Oh Wook Kwon, Dae Sik Jang, Sun Yeou Kim, Jong Hoon Ryu, Ji Woong Choi
Microglial activation and its-driven neuroinflammation are characteristic pathogenetic features of neurodiseases, including focal cerebral ischemia. The Artemisia asiatica (Asteraceae) extract and its active component, eupatilin, are well-known to reduce inflammatory responses. But the therapeutic potential of eupatilin against focal cerebral ischemia is not known, along with its anti-inflammatory activities on activated microglia. In this study, we investigated the neuroprotective effect of eupatilin on focal cerebral ischemia through its anti-inflammation, particularly on activated microglia, employing a transient middle cerebral artery occlusion/reperfusion (tMCAO), combined with lipopolysaccharide-stimulated BV2 microglia...
2017: PloS One
https://www.readbyqxmd.com/read/28154249/innovations-in-liposomal-dds-technology-and-its-application-for-the-treatment-of-various-diseases
#13
REVIEW
Naoto Oku
Liposomes have been widely used as drug carriers in the field of drug delivery systems (DDS), and they are thought to be ideal nano-capsules for targeting DDS after being injected into the bloodstream. In general, DDS drugs meet the needs of aged and super-aged societies, since the administration route of drugs can be changed, the medication frequency reduced, the adverse effects of drugs suppressed, and so on. In fact, a number of liposomal drugs have been launched and used worldwide including liposomal anticancer drugs, and these drugs have appeared on the market owing to various innovations in liposomal DDS technologies...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28130211/plasma-kallikrein-mediates-brain-hemorrhage-and-edema-caused-by-tissue-plasminogen-activator-therapy-in-mice-after-stroke
#14
Fabrício Simão, Tuna Ustunkaya, Allen C Clermont, Edward P Feener
Thrombolytic therapy using tissue plasminogen activator (tPA) in acute stroke is associated with increased risks of cerebral hemorrhagic transformation and angioedema. While plasma kallikrein (PKal) has been implicated in contributing to both hematoma expansion and thrombosis in stroke, its role in the complications associated with the therapeutic use of tPA in stroke is not yet available. We investigated the effects of tPA on plasma prekallikrein (PPK) activation and the role of PKal on cerebral outcomes in a murine thrombotic stroke model treated with tPA...
January 27, 2017: Blood
https://www.readbyqxmd.com/read/28127755/bisperoxovandium-pyridin-2-squaramide-targets-both-pten-and-erk1-2-to-confer-neuroprotection
#15
Zhi-Feng Zhang, Juan Chen, Xin Han, Ya Zhang, Hua-Bao Liao, Rui-Xue Lei, Yang Zhuang, Ze-Fen Wang, Zhiqiang Li, Jin-Cao Chen, Wei-Jing Liao, Hai-Bing Zhou, Fang Liu, Qi Wan
BACKGROUND AND PURPOSE: We and others have shown that inhibiting PTEN or activating Erk1/2 confer neuroprotection. We designed a compound, the bisperoxovandium (pyridin-2-squaramide) [bpV(pis)]. The purpose of this study was to determine whether and how bpV(pis) exerted its neuroprotective effect in cerebral ischemia-reperfusion injury. EXPERIMENTAL APPROACH: Malachite Green based phosphatase assay was used to measure PTEN activity. Western bolt assay was used to measure the phosphorylation level of Akt and Erk1/2 (p-Akt and p-Erk1/2)...
January 27, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28120153/effects-of-neural-stem-cell-and-olfactory-ensheathing-cell-co-transplants-on-tissue-remodelling-after-transient-focal-cerebral-ischemia-in-the-adult-rat
#16
Ingrid Lovise Augestad, Axel Karl Gottfrid Nyman, Alex Ignatius Costa, Susan Carol Barnett, Axel Sandvig, Asta Kristine Håberg, Ioanna Sandvig
Effective transplant-mediated repair of ischemic brain lesions entails extensive tissue remodeling, especially in the ischemic core. Neural stem cells (NSCs) are promising reparative candidates for stroke induced lesions, however, their survival and integration with the host-tissue post-transplantation is poor. In this study, we address this challenge by testing whether co-grafting of NSCs with olfactory ensheathing cells (OECs), a special type of glia with proven neuroprotective, immunomodulatory, and angiogenic effects, can promote graft survival and host tissue remodelling...
January 24, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28103118/park2-dependent-mitophagy-induced-by-acidic-postconditioning-protects-against-focal-cerebral-ischemia-and-extends-the-reperfusion-window
#17
Zhe Shen, Yanrong Zheng, Jiaying Wu, Ying Chen, Xiaoli Wu, Yiting Zhou, Yang Yuan, Shousheng Lu, Lei Jiang, Zhenghong Qin, Zhong Chen, Weiwei Hu, Xiangnan Zhang
Prompt reperfusion after cerebral ischemia is critical for neuronal survival. Any strategies that extend the limited reperfusion window will be of great importance. Acidic postconditioning (APC) is a mild acidosis treatment that involves inhaling CO2 during reperfusion following ischemia. APC attenuates ischemic brain injury although the underlying mechanisms have not been elucidated. Here we report that APC reinforces ischemia-reperfusion-induced mitophagy in middle cortical artery occlusion (MCAO)-treated mice, and in oxygen-glucose deprivation (OGD)-treated brain slices and neurons...
March 4, 2017: Autophagy
https://www.readbyqxmd.com/read/28093478/long-noncoding-rna-malat1-regulates-cerebrovascular-pathologies-in-ischemic-stroke
#18
Xuejing Zhang, Xuelian Tang, Kai Liu, Milton H Hamblin, Ke-Jie Yin
The study was designed to determine the role of long noncoding RNA (lncRNA), metastasis-associated lung adenocarcinoma transcript 1 (Malat1), in ischemic stroke outcome. Primary mouse brain microvascular endothelial cells (BMECs) were cultured and treated with Malat1 GapmeR before 16 h oxygen and glucose depravation (OGD). Cell death was assayed by LDH and MTT methods. Malat1 knock-out and wild-type mice were subjected to 1 h of middle cerebral artery occlusion (MCAO) and 24-72 h of reperfusion. To explore the underlying mechanism, apoptotic and inflammatory factors were measured by qPCR, ELISA, and Western blotting...
February 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28087909/-tripotolide-ameliorates-inflammation-and-apoptosis-induced-by-focal-cerebral-ischemia-reperfusion-in-rats
#19
Shi Bai, Yayi Sun, Lijuan Wu, Zhongmin Wu, Marong Fang
Objective: To investigate the effects of triptolide on inflammation and apoptosis induced by focal cerebral ischemia/reperfusion in rats. Methods: The rat model of focal cerebral ischemia/reperfusion injury was established according to Longa's method. A total of 80 SD rats were randomly divided into 5 groups:normal control, sham group, DMSO group, middle cerebral artery occlusion (MCAO) group, and MCAO with tripolide treatment group. TTC staining was used to examine the site and volume of cerebral infarction, and Longa score was employed for neurological disorders measurement...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28087473/salvianolic-acids-for-injection-safi-suppresses-inflammatory-responses-in-activated-microglia-to-attenuate-brain-damage-in-focal-cerebral-ischemia
#20
Pengwei Zhuang, Yanjun Wan, Shihan Geng, Ying He, Bo Feng, Zhengliang Ye, Dazheng Zhou, Dekun Li, Hongjun Wei, Hongyan Li, Yanjun Zhang, Aichun Ju
BACKGROUND: Inflammatory reactions induced by microglia in the brain play crucial roles in ischemia/reperfusion (I/R) cerebral injuries. Microglia activation has been shown to be closely related to TLR4/NF-κB signal pathways. Salvianolic acids for injection (SAFI) have been used in clinical practice to treat ischemic stroke with reported neuroprotective effects; however, the underlying mechanisms are still uncertain. OBJECTIVE AND METHODS: First, we studied the effect of SAFI on inflammatory responses in LPS-stimulated BV-2 microglia...
January 10, 2017: Journal of Ethnopharmacology
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