1.Progress of RASSF1A gene in neoplasms.
Xue-Sen XING ; Li-Ming HUANG ; Xiang-Dong MA
Chinese Journal of Pathology 2004;33(6):562-564
Animals
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DNA Methylation
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Female
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Genes, Tumor Suppressor
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Genes, ras
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Humans
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Lung Neoplasms
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genetics
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metabolism
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Nasopharyngeal Neoplasms
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genetics
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metabolism
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Signal Transduction
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Tumor Suppressor Proteins
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genetics
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metabolism
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Uterine Cervical Neoplasms
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genetics
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metabolism
2.Effect of pretreatment with danazol on expressions of EGFR and VEGF in endometrium
Zhao DUAN ; Xiang XUE ; Ming LIU ; Jianguo ZHANG
Journal of Xi'an Jiaotong University(Medical Sciences) 1981;0(02):-
Objective To study the expressions of EGFR and VEGF in endometrium after danazol pretreatment and the pathological changes of endometrium. Methods A total of 60 patients with anovulartory functional bleeding were randomly divided into two groups: Danazol group and control group with 30 cases in each group. Danazol group were given transcervical resection of endometrium with danazol pretreatment, and control group without any pretreatment. The endometrium resected from uterus was sent for histological assessment, observation of the grandular quantity and stromal loose degree, and of the expressions of EGFR and VEGF in endometrium. Results The endometrium of patients who took Danazol were almost in proliferative phase(similar to early proliferative phase).The numbers of endometrial glands near the basal layer with Danazol pretreatment were lower than that in the control group; the stromal components (+~) were more compact than the contral group (~). The expression intensity and rates of EGFR and VEGF in glands were higher than those of stromal components. Danazol decreased the expression of EGFR and VEGF in endometrium compared to the control group. Conclusion Pretreatment with Danazol can suppress the prolifieration of endometrial cells, thin the endometrium,and disperse the glands, compact the stromal components, and it can also reduce the expressions of EGFR and VEGF in endometrial glands and stromal components compared with the control group.
3.Improving doctor-patient relationship, enhancing the oral cavity medical service effect
Ming-cong YANG ; Xiao-ping FAN ; Xue-rong XIANG
Chinese Journal of Medical Education Research 2011;10(7):851-853
While the medicine pattern of biomedicine turn to biological-psychology-society, the medical trouble communication becomes more and more important in the medical service. Good medical trouble communication ability is the essential condition of doctor. As oral cavity clinicians, only by gasping the principle of communication can we appropriately utilize some skills of communication exchange,establish the good medical trouble relations with the patient and achieve the good treatment result finally.
4.Study on inhibitory effects and mechanism of lipophilic components in Salvia miltiorrhiza on angiogenesis in vitro.
Xue-Mei FAN ; Gui-Xiang REN ; Qiong-Lin LIANG ; Yi-Ming WANG ; Guo-An LUO
China Journal of Chinese Materia Medica 2014;39(4):744-747
In this study, the human umbilical vein endothelial cell model was used to study the regulating effect of lipophilic components in Salvia miltiorrhiza on angiogenesis, and explore its possible mechanism. The cell model was established to determine the effect of lipophilic components in S. miltiorrhiza on the proliferative activity and migration capacity of endothelial cells. Then the realtime fluorescence quantification PCR technology was applied to detect the changes in the gene expressions of angiogenesis-related cytokines VEGF-A, VEGF-C and MMP-9. The results showed that 5 mg x L(-1) lipophilic components in S. miltiorrhiza could inhibit the proliferation and migration of endothelial cells, and reduce the expression of VEGF-A and MMP-9 genes. It indicated that lipophilic components in S. miltiorrhiza may inhibit the proliferation and migration of endothelial cells by inhibiting the expression of VEGF-A and MMP-9 genes, so as to show the inhibitory effect on angiogenesis.
Angiogenesis Inhibitors
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chemistry
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pharmacology
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Cell Movement
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drug effects
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Cell Proliferation
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drug effects
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Drugs, Chinese Herbal
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chemistry
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pharmacology
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Human Umbilical Vein Endothelial Cells
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cytology
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drug effects
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metabolism
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Humans
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Matrix Metalloproteinase 9
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genetics
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metabolism
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Salvia miltiorrhiza
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chemistry
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Vascular Endothelial Growth Factor A
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genetics
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metabolism
5.Non-linear research of alertness levels under sleep deprivation.
Ranting XUE ; Peng ZHOU ; Xiang GAO ; Xinming DONG ; Xiaolu WANG ; Dong MING ; Hongzhi QI ; Xuemin WANG
Journal of Biomedical Engineering 2014;31(3):506-510
We applied Lempel-Ziv complexity (LZC) combined with brain electrical activity mapping (BEAM) to study the change of alertness under sleep deprivation in our research. Ten subjects were involved in 36 hours sleep deprivation (SD), during which spontaneous electroencephalogram (EEG) experiments and auditory evoked EEG experiments-Oddball were recorded once every 6 hours. Spontaneous and evoked EEG data were calculated and BEAMs were structured. Results showed that during the 36 hours of SD, alertness could be divided into three stages, i. e. the first 12 hours as the high stage, the middle 12 hours as the rapid decline stage and the last 12 hours as the low stage. During the period SD, LZC of Spontaneous EEG decreased over the whole brain to some extent, but remained consistent with the subjective scales. By BEAMs of event related potential, LZC on frontal cortex decreased, but kept consistent with the behavioral responses. Therefore, LZC can be effective to reflect the change of brain alertness. At the same time LZC could be used as a practical index to monitor real-time alertness because of its simple computation and fast calculation.
Attention
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physiology
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Brain Mapping
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Electroencephalography
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Evoked Potentials
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Humans
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Nonlinear Dynamics
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Sleep Deprivation
6.Brain Vigilance Analysis Based on the Measure of Complexity.
Yunlong ZHAO ; Xuemin WANG ; Ranting XUE ; Xiaolu WANG ; Xiang GAO ; Dong MING ; Hongzhi QI ; Peng ZHOU
Journal of Biomedical Engineering 2015;32(4):725-729
Vigilance is defined as the ability to maintain attention for prolonged periods of time. In order to explore the variation of brain vigilance in work process, we designed addition and subtraction experiment with numbers of three digits to induce the vigilance to change, combined it with psychomotor vigilance task (PVT) to measure this process of electroencephalogram (EEG), extracted and analyzed permutation entropy (PE) of 11 cases of subjects' EEG and made a brief comparison with nonlinear parameter sample entropy (SE). The experimental results showed that: PE could well reflect the dynamic changes of EEG when vigilance decreases, and has advantages of fast arithmetic speed, high noise immunity, and low requirements for EEG length. This can be used as a measure of the brain vigilance indicators.
Attention
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Brain
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physiology
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Electroencephalography
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Entropy
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Humans
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Mathematics
7.Glucuronidation is the dominating in-vivo metabolism pathway of herbacetin:elucidation of herbacetin pharmacokinetics after intravenous and oral administration in rats
GE BEI-KANG ; ZHAO LIANG ; QI TE ; XU PING-XIANG ; XUE MING
Chinese Journal of Pharmacology and Toxicology 2017;31(10):1019-1019
OBJECTIVE To map a comprehensive metabolic pathway of herbacetin in rats, specifically, to elucidate the biotransformation of herbacetin in vivo and to simultaneously monitor the pharmacokinetic process of both parent drug and its major metabolites. METHODS liquid chromatography/ion trap mass spectrometry (LC/MSn) and ultra-liquid chromatography coupled with mass spectrometry (UPLC/MS) were combined in the current study for qualitative and quantitative determinations of herbacetin and its metabolites in bile, urine and feces after both oral and intravenous administration of herbacetin to rats. Enzyme kinetic studies on the intestinal and hepatic metabolism of herbacetin were further conducted to elucidate metabolic profiles of herbacetin in rat tissues and organs. Additionally, plasma concentration profiles of herbacetin and its metabolites in rats were obtained to characterize the overall pharmacokinetic behavior of herbacetin. RESULTS It was found that herbacetin was excreted primarily from rat urine in the form of glucuronide-conjugations. Subsequent in vitro enzyme kinetic studies and in vivo pharmacokinetic investigations suggested an extensive hepatic metabolism of herbacetin and the high exposure of herbacetin- glucuronides in systemic circulation. The clearance, half- life and bioavailability of herbacetin in rats were determined as (16.4±1.92)mL·kg-1·min-1, (11.9±2.7)min, and 1.32%, respectively. On basis of these findings, a comprehensive metabolic pathway of herbacetin in rats was composed. In addition, a physiology based pharmacokinetic (PBPK) model was successfully developed with the aid of the GastroPlus to simulate the pharmacokinetic process of herbacetin in rats. Application of the PBPK modeling can provide a useful starting point to understand and extrapolate pharmacokinetic parameters among different species, populations, and disease states. CONCLUSION After oral administration, herbacetin was subjected to colonic degradation and extensive first pass metabolism, with glucuronidation as its dominating in vivo metabolic pathway.
8.Mechanistic study on the pharmacokinetic process of salidroside in hypoxic rats
QI TE ; GE BEI-KANG ; ZHAO LIANG ; XU PING-XIANG ; XUE MING
Chinese Journal of Pharmacology and Toxicology 2017;31(10):996-997
OBJECTIVE To investigate the effect of hypoxia on the pharmacokinetic process of salidrosidein rats and to explore its underlying mechanisms. METHODS The Caco-2 cell monolayerwas exposed to 1% oxygen (O2) concentration for 24 h to build the hypoxiccell model. The transportation mode of salidroside was investigated with the aid of this hypoxia model by detecting the apparent permeability coefficient(Papp). Healthy Sprague Dawley (SD) rats were exposed to 9% O2 for 72 h for the construction of hypoxic rat model. Liver sample was subsequently collected from the hypoxic rats with an aim to identify enzymes responsible for salidroside metabolism. The expression levels of sali?droside-transporting and salidroside-metabolizing enzymes, including Sodium-dependent glucose cotrans?porters (SGLT1), β-glucosidase (GBA3)and sulfotransferase (SULT2A1), were thereafter detected by RT-PCR and Western blot. The metabolic activity of GBA3 and SULT2A1 was monitored by rat liver microsome incubation.In addition, the renal function of rats under hypoxia was assessed by detecting concentrations of blood urea nitrogen and creatinine. RESULTS The AUC and t1/2 values of salidroside in hypoxic rats were more than doubled, while the in vivo clearance was significantly reduced. Mechanistic study demonstrated that the PappA- B/PappB- A eualsto 10.3, indicating the potential active transport of salidrosile. The expression of SGLT1 and GBA3 was significantly decreased, which indicated a reduced metabolism of salidroside under hypoxia. Moreover, rat under hypoxia was found to suffer from renal dysfunction, with an abnormal value of blood urea nitrogen. CONCLUSION Due to the reduced metabolism and the abnormal renal function under hypoxia, the systemic exposure of salidroside in rats was signifi?cantly enhanced.
9.Comparative study of absorbable screw and metallic internal fixation in treatment of tibial plateau fractures
An-Qun YANG ; Xue-Ming CHENG ; Jin-Dong WANG ; Chun-Yan LAN ; Li-Juan XIANG ;
Chinese Journal of Trauma 2003;0(07):-
Objective To assess the effectiveness of absorbable screws and metallic devices for treating tibial plateau fractures.Methods Fifty-seven cases of tibial plateau fractures were treated with internal fixation using absorbable screws(Group A),cannulated screws(Group B)and condylar buttress plates(Group C)in our hospital.According to Schatzker classification,there were 15 cases with typeⅠfractures,21 with typeⅡ,nine with typeⅢand 12 with typeⅣ,who were followed up for 6-51 months. Statistical analysis was performed to compare bone union and functional restoration of the knee between three groups.Results Bone union was achieved in all cases.Based on Merchant scale for knee func- tion,excellence rate was 84%(16/19)for Group A,92%(11/12)for Group B and 85%(22/26) for Group C,with no significant statistical difference.Conclusion Absorbable screws is as effective as metallic devices for treating tibial plateau fractures and has advantages of minimal invasion,few complica- tions and avoiding secondary operation.
10.Correlation between Platelet Activating Factor Acetylhydrolase and Primary Nephrotic Syndrome
chun, ZHOU ; cheng-xue, JING ; ming-fang, LI ; xiang-zhi, XIE
Journal of Applied Clinical Pediatrics 2006;0(17):-
Objective To investigate the association of platelet activating factor acetylhydrolase(PAF-AH) activity in children with primary nephrotic syndrome(PNS).Methods The plasma PAF-AH activity was measured in 78 children with PNS who were divided into 3 groups:steroid-responsive nephritic,steroid-dependent nephritic,steroid-resistent nephritic,after they had been given steroid for 6 months.The plasma PAF-AH activity were also measured in 60 healthy children at the same age,with spectrophotometric assay,at the ame time,the blood cholesterol was measured.Results The blood cholesterol has positive correlation with the plasma PAF-AH activity,there was no significant difference of the blood cholesterol among 3 groups in nephrotic syndrome children,there was a significant difference in the plasma PAF-AH activity among 3 groups in PNS children,but there was no significant difference in the plasma PAF-AH activity between the groups of steroid-responsive nephritic and healthy children.Conclusion Plasma PAF-AH activity is related to the sensibility to steroid treatment in children′s PNS,and the plasma PAF-AH activity in steroid-resistent nephritic is higher than steroid-dependent nephritic.It is a question that if gene mutation is related with PAF-AH activity.