Tian-Yi Zhang

The Third Xiangya Hospital of the Central South University, Ch’ang-sha-shih, Hunan, China

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Publications (6)3.94 Total impact

  • Hao Liu · Zhi Song · Da-Guang Liao · Tian-Yi Zhang · Feng Liu · Wen Zheng · Kui Luo · Liang Yang
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    ABSTRACT: A number of studies have suggested that the Cyclin D1 (CCND1) G870A polymorphism was associated with susceptibility to various cancers. In the present study, we aimed to investigate the association between CCND1 G870A polymorphism and the risk of glioma in a Chinese population. CCND1 genotyping was determined by the PCR-RFLP method. The χ (2) test was used to assess for any deviation of the genotype frequencies from Hardy-Weinberg equilibrium and to compare the genotype distributions among glioma patients and healthy control subjects. We calculated the odds ratios (ORs) and 95% confidence intervals (95% CIs) by using unconditional logistic regression. The A allele frequency was higher in cases than that in controls (49.40% vs. 36.39%), and this difference was statistically significant (P = 0.001). Using the G allele as the reference allele, the subjects carrying the A allele had 3.926-fold increase in the risk of glioma (95% CI, 2.172-7.889), and p-value was significant (P = 0.007). Compared to individuals with the GG genotype, individuals with the AA genotype exhibited significantly increased glioma risk (OR = 3.661, 95% CI: 1.658-6.287, P = 0.01). Our results suggest that the CCND1 G870A polymorphism may contribute to the susceptibility to glioma in Chinese population.
    No preview · Article · Aug 2015 · International Journal of Clinical and Experimental Medicine
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    ABSTRACT: This paper was designed to investigate anticonvulsant and sedative effects of eudesmin isolated from Acorus tatarinowii. The eudesmin (5, 10, and 20 mg/kg) was administered intraperitoneally (i.p.). The maximal electroshock test (MES) and pentylenetertrazole (PTZ)-induced seizures in male mice were used to evaluate anticonvulsant activities of eudesmin, and sedative effects of eudesmin were evaluated by pentobarbital sodium-induced sleeping time (PST) and locomotor activity in mice. Finally, the mechanisms of eudesmin were investigated by determining contents of glutamic acid (Glu) and gamma-aminobutyric acid (GABA) in epileptic mice, and expressions of glutamate decarboxylase 65 (GAD65), GABAA , Bcl-2, and caspase-3 in the brain of chronic epileptic rats. Results of MES and PTZ tests revealed that eudesmin possesses significant anticonvulsant effects, and the PST and locomotor activity tests demonstrated that eudesmin has significant sedative effects. Furthermore, our study revealed that after treatment with eudesmin, GABA contents increased, whereas Glu contents decreased, and ratio of Glu/GABA decreased. Our results also indicated that expressions of GAD65, GABAA, and Bcl-2 were up-regulated by treating with eudesmin, whereas the caspase-3 obviously was down-regulated. In conclusion, eudesmin has significant anticonvulsant and sedative effects, and the mechanism of eudesmin may be related to up-regulation of GABAA and GAD65 expressions, and anti-apoptosis of neuron the in brain. Copyright © 2015 John Wiley & Sons, Ltd. Copyright © 2015 John Wiley & Sons, Ltd.
    No preview · Article · Apr 2015 · Phytotherapy Research
  • Fei Liu · Wen Yuan · Da-Guang Liao · Tian-Yi Zhang · Zhi-Fei Wang
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    ABSTRACT: To evaluate the effect of aneurysm clipping and partial blood clot removal in the subarachnoid space on hemorrhage volume in the subarachnoid space and cerebral vasospasm in patients with different Fisher grades. Patients with subarachnoid space hemorrhage (SAH) of Fisher Grades I, II, and III were subdivided into control and treatment groups for comparative studies. The patients with unruptured intracranial aneurysms (UIAs) undergoing aneurysm clipping were also compared with Fisher grade I control subgroup. OxyHb levels in the cerebrospinal fluid and cerebral blood flow volume (CBFV) of the middle cerebral artery (MCA) were measured on days 3, 7, and 13 day after SAH. The patients with UIAs and Fisher Grade I control subgroup showed significant differences in OxyHb levels on day 3 in CBFV of the MCA on days 3 and 7 (P<0.05). In the SAH groups, OxyHb levels increased significantly on day 3 day in the treatment subgroups of Fisher Grades I and II, but declined significantly on days 7 and 13 in Fisher Grade III treatment subgroup as compared with the corresponding control subgroups (P<0.05); in Fisher Grade I group on days 3 and 7 and in Fisher Grade II group on day 7, CBFV of the MCA increased significantly in the treatment subgroups, but in Fisher Grade III group, CBFV decreased significantly on days 7 and 13 compared with the control subgroup (P<0.05). A positive correlation was found between OxyHb levels in the cerebrospinal fluid and CBFV of the MCA (P<0.05). For patients with Fisher Grades I and II aneurysms, craniotomy may increase hemorrhage volume in the subarachnoid space and exacerbate cerebral vasospasm, but for Grade III patients, aneurysm clipping and blood clot removal shows beneficial effects in terms of reducing hemorrhage volume and relieving cerebral vasospasm.
    No preview · Article · Jul 2013 · Nan fang yi ke da xue xue bao = Journal of Southern Medical University
  • Fei Liu · Wen Yuan · Da-Guang Liao · Tian-Yi Zhang · Zhi-Fei Wang
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    ABSTRACT: To study the role of transforming growth factor-β1 (TGF-β1) levels and other risk factors in the occurrence of chronic hydrocephalus after aneurysmal subarachnoid hemorrhage (aSAH). Patients treated for aSAH in our hospital between January, 2007 and June, 2012 were divided into non-hydrocephalus group and hydrocephalus group. TGF-β1 levels in the cerebrospinal fluid (CSF) were compared between the two groups at different time points. A retrospective analysis was conducted to identify the potential risk factors for chronic hydrocephalus, which were subsequently confirmed by Logistic regression analysis. Of the 129 patients enrolled, 16 (12.4%) developed chronic hydrocephalic with an average diagnosis time of 31.6∓17.0 days. In patients with chronic hydrocephalus, TGF-β1 level in the CSF increased significantly on the 13th day following aSAH (P<0.05). Retrospective analysis showed that the patients with hydrocephalus and those without had significant differences in history of hypertension, times of SAH, Hunt-Hess classification, ventricular expansion, aneurysm position, Fisher classification, ventricular hemorrhage score and intracranial infections (P<0.05). Logistic regression analysis identified ventricular expansion, aneurysm position, Fisher classification, ventricular hemorrhage score and postoperative intracranial infections as significant risk factors for the occurrence of chronic hydrocephalus (P<0.05). In adult patients with aSAH, the risk factors for chronic hydrocephalus include ventricular expansion, aneurysm position, Fisher classification, ventricular hemorrhage score and postoperative intracranial infections. These risk factors can have greater clinical value than TGF-β1 levels in the CSF in predicting the occurrence of chronic hydrocephalus following aSAH.
    No preview · Article · Mar 2013 · Nan fang yi ke da xue xue bao = Journal of Southern Medical University
  • Zhi-fei Wang · Da-guang Liao · Tian-yi Zhang · Jin-fu Yang · Fei Liu
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    ABSTRACT: To simulate the surgical approaches for intracranial aneurysms using three-dimensional CT angiography (3D-CTA) and assess the value of 3D-CTA in early microneurosurgery for ruptured intracranial aneurysms. Forty-eight patients with spontaneous subarachnoid hemorrhage due to ruptured intracranial aneurysm were confirmed by early operation. All the patients were classified according to Hunt-Hess, including 11 of grade I, 29 of grade II, and 8 of grade III. CTA was performed before the operation and surgical simulation was conducted. The preoperative findings on CTA and the intraoperative findings were compared and the clinical value of cerebral 3D-CTA was analyzed. Pre-operative 3D-CTA clearly displayed the location, size and shape of the aneurysms, the axis direction of the aneurysm apex and the width of aneurysm neck. The spatial relation between the parent aneutysm artery, the aneurysm, the peripheral vessels and the bony structures were also demonstrated. These findings were basically consistent with the intraoperative findings. The Glasgow outcome score was 5 in 41 patients, 4 in 4 patients, 3 in 2 patients, and 2 in 1 patient upon discharge from the hospital. Preoperative 3D-CTA examination can simulate the surgery for ruptured aneurysms to help improve the surgical success rate.
    No preview · Article · Dec 2009 · Nan fang yi ke da xue xue bao = Journal of Southern Medical University
  • Zhi-fei Wang · Fei Liu · Da-guang Liao · Tian-yi Zhang
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    ABSTRACT: To evaluate the use of endoscopic surgery for hypertensive cerebral hemorrhage. Sixteen patients with hyertensive intracerebral hematoma were evacuated with neuroendoscope. The surgical invasive markers, volume of remaining hematoma, and prognosis were compared with those of 19 comparable patients undergoing conventional craniotomy. Complete evacuation of hematoma was achieved in 9 patients, and partial evacuation in 7. All patients were followed up for 6 months. According to GOS, the result was excellent in 6 patients, good in 6, fare in 2, poor and dead in one respectively. The volume of remaining hematoa and invasive markers significantly decreased (P < 0.05); No difference was found in prognosis between the two groups (P > 0.05). Neuroendoscopic surgery for hypertensive intracerebral hematoma is characterized by mini-invasion, time-saving, and direct-vision, and is a new approach in this field.
    No preview · Article · Aug 2005 · Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences