Yuqian Tao

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (5)13.75 Total impact

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    ABSTRACT: To investigate the patient satisfaction with medications commonly used for migraine therapy in patients seen in headache clinic in China with emphasis on the evaluation of Chinese patent medicine (CPM) in relieving acute migraine attack. Patients admitted at headache clinics in the neurological departments of four hospitals during April to October 2011 were enrolled in the investigation. The questionnaire was designed based on the validation of a diagnostic questionnaire for a population-based survey in China in 2009. Among 219 eligible patients, 58% had used CPM at the acute attack of migraine while the guideline-recommended treatments were seldom used. However, patients using CPMs were less satisfied than those using Western Medicines (WMs) in either single medication groups or mixed medication groups (P < 0.05). Fifty-eight percent of the eligible respondents in Guangdong and Guangxi Province had used CPM at the acute attack of migraine, but based on our data, the effect of CPM on treating migraine attack was poor with low satisfaction compared with WMs. However, many factors may bias or explain our findings. This suggests the need for accelerated research in understanding patient choice, treatment availability, and use of medications.
    Pain Medicine 02/2014; 15(2):320-8. · 2.46 Impact Factor
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    ABSTRACT: Pleiotrophin (PTN) is an effective neuroprotective factor and its expression is strikingly increased in microglia after ischemia/reperfusion injury. However, whether PTN could provide neurotrophic support to neurons by regulating microglia function is not clear. In this study, we demonstrated that the expression of PTN was induced in microglia after oxygen-glucose deprivation/reperfusion. PTN promoted the proliferation of microglia by enhancing the G1 to S phase transition. PTN also stimulated the secretion of brain-derived neurotrophic factor (BDNF), ciliary neurotrophic factor (CNTF) and nerve growth factor (NGF) in microglia, but did not upregulate the expression of proinflammatory factors such as TNF-α, IL-1β and iNOS. Mechanistically, we found that PTN increased the phosphorylation of extracellular signal-regulated kinase (ERK) 1/2 in microglia in both concentration-dependent and time-dependent manners. In addition, ERK1/2 inhibitor U0126 abolished the proliferation and G1 to S phase transition of microglia stimulated by PTN, and inhibited the production of BDNF, CNTF and NGF induced by PTN. In conclusion, our results demonstrated that PTN-ERK1/2 pathway plays important role in regulating microglia growth and secretion of neurotrophic factors. These findings provide new insight into the neuroprotective role of PTN and suggest that PTN is a new target for therapeutic intervention of stroke.
    Neuroscience Research 12/2012; 74(s 3–4):269–276. · 2.20 Impact Factor
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    ABSTRACT: BACKGROUND AND PURPOSE: Overuse of analgesic plays a prominent role in migraine chronification. Paracetamol caffeine aspirin (PCA) powders are commonly used in Chinese migraineurs. This study investigated the effects of the specific combination analgesic on cerebral glucose metabolism in chronic migraine (CM). METHODS: 18F-FDG-PET was used to measure regional metabolism in all subjects. Brain metabolisms of CM patients with analgesic overuse (AO-CM; n = 10), no analgesic overuse (NAO-CM; n = 10), and no regimen (NR-CM; n = 10) and 17 age- and gender-matched normal controls (NC) were compared using statistical parametric mapping. Then, all patients underwent brain MRI analysis within 7 days after PET scans, as well as MMSE and MoCA scale for cognitive function tests. RESULTS: Glucose metabolic changes in CM patients taking different dosage of analgesic during headache-free periods and clear distinctions in several brain regions were observed. Patients with AO-CM exhibited significant metabolic reductions in thalamus, as well as increased metabolism in middle temporal gyrus and insula relative to NR-CM and NAO-CM. However, in these regions, no difference was observed in AO-CM except for increased metabolism in the right insula relative to NC group. CONCLUSIONS: Overusing PCA powders affects regional brain glucose metabolism in CM. Increased metabolism in the right insula may be associated with recurrently overusing of PCA powders.
    European Journal of Neurology 10/2012; · 4.16 Impact Factor
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    ABSTRACT: Preconditioning-induced cellular adaptation is a new therapeutic strategy for ischemic stroke. This research aims to examine the role of peroxisome proliferator activated receptor (PPAR)-γ co-activator 1-α (PGC-1α) and hypoxia induced factor-1α (HIF-1α) in hypoxic preconditioning-induced protection. In this study, rat artery endothelial cells and neuronal PC12 cells were preconditioned with hypoxia before oxygen-glucose deprivation (OGD) insult. Cell viability, protein expression and oxidative stress were then evaluated. PGC-1α and HIF-1α were knocked down by RNA interference. We found that hypoxic preconditioning significantly reduced cell damage, enhanced the expression of PGC-1α, HIF-1α and VEGF and attenuated oxidative stress in endothelial and PC12 cells in OGD model. The protective effects of hypoxic preconditioning were hardly detected in HIF-1α or PGC-1α deficit cells. The loss of protection was accompanied with a significant loss of VEGF expression in HIF-1α or PGC-1α deficit PC12 cells and PGC-1α deficit endothelial cells as well as a considerable decrease of anti-oxidative effects in PGC-1α knocked-down endothelial cells. The present study demonstrated that both PGC-1α and HIF-1α played crucial roles in hypoxic preconditioning in endothelial and neuronal cells.
    Brain research 02/2012; 1447:1-8. · 2.46 Impact Factor
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    ABSTRACT: DL-3-n-butylphthalide (NBP) has been used for stroke treatment in China for years. Recently, we found that NBP can reduce the incidence of stroke and have protective action on cerebral microvessels, suggesting a direct action of NBP on endothelial cells. However, it is difficult to evaluate the direct action of NBP on endothelial cells in vivo because of the interactions of endothelial cells with other types of neuronal cells. Therefore, we investigated whether NBP protects against oxygen glucose deprivation (OGD)-induced cell injury in an immortalized human umbilical vein endothelial cells (HUVEC) in vitro. Cells were exposed to OGD, leading to endothelial damage. Endothelial injury was assessed by measuring MTT and the changes in chromatin morphology. Mitochondrial superoxide, mitochondrial membrane potential and mitochondrial morphology were assessed using MitoSOX Red. Rhodamine 123 and MitoTracker, respectively. Nitrosative stress was assessed by measuring the production of peroxynitrite. The activity of superoxide dismutase (SOD) is evaluated using SOD assay kit-WST. The expression of hypoxia inducible factor-1 alpha (HIF-1alpha) was assessed at the protein level by immunofluorescence and Western blotting. NBP at doses between 0.01 and 100 micromol/L dose-dependently protected against OGD-induced cell death. In addition, NBP attenuated OGD-induced mitochondria superoxide, cellular formation of peroxynitrite, and decrease in SOD activity, mitochondria fragmentation and loss of mitochondrial membrane potential. In parallel, NBP enhanced OGD-induced HIF-1alpha expression. This study demonstrates that NBP can protect HUVEC against OGD-induced oxidative/nitrosative stress, mitochondrial damage and subsequent cell death. This protective effect is, at least in part, associated with its enhancement on OGD-induced HIF-1alpha expression.
    Brain research 08/2009; 1290:91-101. · 2.46 Impact Factor