2.Ratio of peak early to late diastolic filling velocity of the left ventricular inflow is associated with left atrial appendage thrombus formation in elderly patients with acute ischemic stroke and sinus rhythm
Ling LIU ; Huazhao DENG ; Sigan ZHONG ; Fei YANG ; Chun XIAO
Journal of Chinese Physician 2013;(6):751-754
Objective To investigate the useful parameters of transthoracic echocardiography (TTE) for the diagnosis of stroke subtypes in patients with acute cerebral infarction.Methods One hundred and one acute ischemic stroke patients met all of the following criteria including ≥50 years of age,normal sinus rhythm on admission,and transesophageal echocardiography (TEE) within 7 days from the onset.The clinical significance of the TEE parameters on admission was examined for identifying intracardiac thrombus formation as follows; left atrial dimension,left ventricular end-diastolic dimension,percentage fractional shortening,left ventricular mass index,ratio of the transmitral inflow velocities (E/A),and the deceleration time of the E wave.Results There were 28 patients with E/A ≥ 1.0 (70 ± 12) years old and 73 with E/A < 1.0 (73 ± 10) years old.No patients showed pulmonary congestion on chest radiography.There were no significant differences in age,TTE parameters,and plasma levels of brain natriuretic peptide between the two groups.Patients with E/A≥ 1.0 had higher incidence of left atrial appendage (LAA)thrombus formation and/or spontaneous echograhic contrast than those with < 1.0 (25.0% vs 5.5%,x2 =7.95,P <0.01).A significant relationship was found between E/A and emptying flow velocity of the LAA (r =-0.569,P <0.01).Multivariate logistic regression analysis showed E/A was an independent predictor for LAA thrombus (risk ratio 1.531 per0.1 increase,95% confidence interval 1.129-2.076,P =0.0002).Conclusions Increased level of E/A on admission was associated with the occurrence of left atrial appendage thrombus formation in patients with acute ischemic stroke.
4.Clinical observation of diabetic retinopathy after transplantation of autologous stem cell in diabetic patients
Xiao-Lin, HAO ; Xiu-Ling, YE ; Zhong-Chen, ZHANG
International Eye Science 2014;(9):1702-1704
To observe the effect of autologous stem cell transplantation in diabetic retinopathy.
●METHODS:Totally 58 cases (116 eyes) who underwent autologous stem cell transplantation were confirmed as no diabetic retinopathy (18 eyes), mild non-proliferative diabetic retinopathy (NPDR) (41 eyes), mid-level NPDR (51 eyes); severe NPDR (6 eyes) by ophthalmoscope directly or indirectly and fluorescence fundus angiography (FFA ). Follow - up was 6 - 12mo, the changes of retinopathy were observed.
●RESULTS: The total effective rate of vision and retinopathy was 84. 4%, 76. 7%. The results of severe NPDR was statistically worse than the other groups ( P <0. 05).
●CONCLUSlON: The stable blood glucose level and improved pancreatic function after autologous stem cell transplantation might be helpful in diabetic retinopathy, the long effects need to be researched further.
6.Quality analysis of Guizhi Fuling capsule before and after application of in-process quality control in pharmaceutical production.
Jia-chun LI ; Jin-ling WANG ; Jing-ling WU ; Wen-zhe HUANG ; Zhen-zhong WANG ; Wei XIAO
China Journal of Chinese Materia Medica 2015;40(6):1017-1022
The effects of application of in-process quality control in Guizhi Fuling capsule production were evaluated by 192 batches data analysis. Using a statistical analysis method, each batch of data were to be counted to research for the difference between 96 samples adopting the technologies of in-process control or not. According to quality standards of Guizhi Fuling capsule, all measurements of the 192 batches of the drugs before and after the application of process control technology were analyzed, and they were within the rules. There was a significant difference between adopting the technologies of process control or not. Application of in-process control technology can improve the uniformity of lot-to-lot for Guizhi Fuling capsule.
Capsules
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chemistry
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Chemistry, Pharmaceutical
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Chromatography, High Pressure Liquid
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Drugs, Chinese Herbal
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chemistry
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Quality Control
7.Inhibitory effect of polydatin on expression of toll-like receptor 4 in ischemia-reperfusion injured NRK-52E cells.
Ying LI ; Wei-Jian XIONG ; Jing YANG ; Jin ZHONG ; Jin ZHENG ; Ling ZHANG ; Xiao-Qin OUYANG
China Journal of Chinese Materia Medica 2014;39(16):3157-3161
Polydatin is a monocrystaline compound isolated from Polygonum cuspidatum Sieb. et Zucc. (Polygonaceae) with biological properties, such as anti-inflammation, anti-oxidative and nephroprotective effects. Increasing number of studies have demonstrated the protective effect of polydatin on renal ischemia reperfusion injury. However, the possible mechanisms of this protection are not fully elucidated. This study aimed to investigate the effect of polydatin on ischemia-reperfusion induced expression of toll-like receptor4 (TLR4) in rat renal tubular epithelia cells (NRK-52E), and analyze the mechanism of polydatin on TLR4 signal pathway. The cultured NRK-52E cells were incubated in three gas incubators for a period of 6 h at hypoxia and 24h at reoxygenation to simulate the ischemia-reperfusion injury in vitro. TLR4 mRNA level was analyzed by real-time-PCR, and the protein expression of TLR4 and NF-κB by Western blotting, while TNF-α and IL-1β proteins expressions were detected by ELISA. Polydatin downregulated I/R induced mRNA and protein expressions of TLR4, and decreased the protein expression of NF-κB, TNF-α and IL-1β. The TLR4 blocker partially antagonized the effect of I/R on NF-κB signaling, and such inhibitory effect was markedly enhanced by polydatin. In the present study, polydatin protects NRK-52E cells from I/R injury possibly by relieving the inflammatory response through regulation of TLR4/NF-κB signaling pathway.
Animals
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Cell Line
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Drugs, Chinese Herbal
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pharmacology
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Gene Expression
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drug effects
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Glucosides
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pharmacology
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Humans
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Rats
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Reperfusion Injury
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drug therapy
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genetics
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metabolism
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Stilbenes
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pharmacology
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Toll-Like Receptor 4
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genetics
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metabolism
8.A continuous-monitoring procedure of alkaline phosphatase activity with p-acetylphenylphosphace as substrate
Ling WANG ; Zhong-Xin LI ; Dian-Jun WEI ; Xiao-Qin DING ; Zong-Hua HU ; Hui JIN ;
Chinese Journal of Laboratory Medicine 2001;0(03):-
Objective To establish a new determination method for the measuring of alkaline phosphatase activity (ALP) with p-acetyl phenyl phosphace (PAP-PNa_2) as substrate.Methods With the help of Vital semiautomatic analyzer,researched a continuous-monitoring procedure and set up experimental parameters.Results When using this assay,the wavelength of PAP's absorption was 325 nm and the Km of ALP was 0.376 mmol/L.The molecular extinction coefficient of PAP at 340 nm was 23 390 L?mol~(-1)? cm~(-1) and the concentration of citrate buffer was 0.438 mol/L.During the process,we found that the optimum pH of enzyme was 10.4,and the concentration of substrate was 5.0 mmol/L.The time of linear reaction was 900 seconds,and the linear range was 0-1 110 U/L.Serum total ALP were 63.1-118.3 U/ L(male) and 52.5-89.0 U/L(female),based on results from 60 heath adults.Conclusions The method is practical in its repetition and convenience,saves time and is not liable to be affected by bilirubin in serum.It is especially suited to the use of automatic analyzers.
9.MRI Diagnosis of Intracranial Meningiomas (An Analysis of 63 Cases)
Zi-San ZENG ; Li-Ling LONG ; Zhong-Kui HUANG ; Xiao-Yang LI
Journal of Practical Radiology 2001;0(10):-
Objective To study the relationship between the MRI features and pathological types of intracranial meningiomas. Methods MRI findings of intracranial meningiomas in 63 cases proved by operation and pathology were analyzed retrospectively.Results Of 63 cases,62 cases were singular and one case was multiple lesions. The lesions were located in frontal,parietal and occipital regions nearby the convexity of the brain in 30 cases,in sellar region in 10,at sphenoidal crest in 8 , at olfactory sulcus in 5 and at other regions in 10. Isointense or slightly hypointense signal on T 1WI was found in 87.27% cases of meningiomas . On T 2WI, tumors had isointense or slightly hyperintense signal in 69.84%, obviously hyperintense signal in 19.05%,heterogenous texture signal in 7.94% and slightly low intense signal in 3.17%. Pathological type was included meningiomas meningothelial(n=29), meningiomas fibrous(n=11) , meningiomas psammomatous(n=8),angioblastic meningiomas (n=5) and meningiomas angiomatous(n=10). Conclusion It is great value in diagnosis of meningiomas with MRI. Meningiomas angiomatous show effecting of blood-vessel flowed empty with MR imaging.
10.Simultaneous determination of amlodipine, benazepril and benazeprilat in human plasma by LC-HESI/MS/MS method.
Hua-Ling PAN ; Li-Shan LIN ; Jue-Fang DING ; Xiao-Yan CHEN ; Da-Fang ZHONG
Acta Pharmaceutica Sinica 2014;49(1):95-100
The study aims to develop a rapid, sensitive and specified method of liquid chromatography with heated electrospray ionization tandem mass spectrometry (LC-HESI/MS/MS) for simultaneous determination of amlodipine, benazepril and benazeprilat in human plasma using amlodipine-d4 and ubenimex as internal standards (ISs). Selected reaction monitoring (SRM) with heated electrospray ionization (HESI) was used in the positive mode for mass spectrometric detection. Analytes and ISs were extracted from plasma by simple protein precipitation. The reconstituted samples were chromatographed on a C18 (100 mm x 4.6 mm, 5 microm) column with mixture of methanol-acetonitrile-5 mmol.L- ammonium acetate-formic acid (30 : 30 : 40 : 0.1) as mobile phase at a flow rate of 0.6 mL.min-1. The standard curves were demonstrated to be linear in the range of 0.02 to 6.00 ng.mL-1 for amlodipine, 0.2 to 1,500 ng.mL-1 for benazepril and benazeprilat with r2>0.99 for each analyte. The lower limit of quantitation was identifiable and reproducible at 0.02, 0.2 and 0.2 ng mL-1 for amlodipine, benazepril and benazeprilat, respectively. The intra-day and inter-day precision and accuracy results were within the acceptable limit across all concentrations. The plasma samples were stable after four freeze-thaw cycles and being stored for 93 days at -20 degrees C. The method was applied to a pharmacokinetic study of a fixed-dose combination of amlodipine and benazepril on Chinese healthy volunteers.
Administration, Oral
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Amlodipine
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administration & dosage
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blood
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Benzazepines
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administration & dosage
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blood
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Chromatography, Liquid
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Humans
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Sensitivity and Specificity
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Spectrometry, Mass, Electrospray Ionization
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Tandem Mass Spectrometry