1.Meta-analysis on disinfectant efficacy of air disinfector
Lihua LIU ; Xiao SONG ; Li WANG
Chinese Journal of Infection Control 2015;(7):450-454
Objective To evaluate disinfectant efficacy of air disinfector and ultraviolet lamp.Methods Domestic literatures were searched by computer,RevMan 5 .3 software provided by the Cochrane collaboration was used for quantitative analysis,efficacy of two kinds of air disinfection methods was compared. Results A total of 1 1 articles met the inclusion criteria. Because the heterogeneity of literatures,random effects model analysis was adopted, colony forming unit (CFU)before disinfection(WMD= -26.28,95% CI:[-60.31,7.75],P>0.05 )and immediately-after disinfection(WMD= 22.45,95% CI:[-34.24,79.13],P>0.05)had no obvious difference between two methods respectively,but CFU of air disinfector 2 hours after disinfection was significantly less than ultraviolet lamp group(WMD= -345.11,95% CI:[-478.28,-211.94],P<0.05).Conclusion Air disinfector has good continuous disinfection efficacy.
2.Mycobacterium tuberculosis antigen activates the nuclear factor-?B pathway and delays spontaneous apoptosis in neutrophils
Chuan-Wang SONG ; Jie TANG ; Qi LIU ; Xiao-Song GE ;
Chinese Journal of Laboratory Medicine 2001;0(03):-
Objective To explore the effect of Mycobacterium tuberculosis antigen (Mtb-Ag) on neutrophils apoptosis.Methods The fresh isolated neutrophils from healthy adults blood were cultured with Mtb-Ag for 24 h,with or without pretreatment of nuclear factor -?B (NF-?B) inhibitor N-tosyl-L-phenylanyl chloromethyl ketone (TPCK) for 30 minutes.Annexin V staining and Flow cytometry were used to measure cell apoptosis of neutrophils.NF-?B DNA binding was measured by gelelectrophorestic mobility shift assay (EMSA) in neutrophils after incubated with Mtb-Ag for 0,1,2,4,6,24 hours.Results Comparing to the spontaneous apoptosis (55%?6%) of neutrophils after culture in vitro for 24 h,treatment of Mtb-Ag (1.125 mg/ml) decreased the cell apoptosis of neutrophils (32%?3%).The NF-?B shift bands were detected at 1 h in neutrophils after stimulated by Mtb-Ag,and reached maximum peak at 2 hours,and then returned to basal levels within 24 h.Pretreatment of TPCK inhibited the anti-apoptosis role of Mtb-Ag in neutrophils.Conclusion Mtb-Ag prevents neutrophils apoptosis and its inhibitory role concerns NF-?B pathway.
3.Studies on anti-inflammatory effects of Zengxuean Capsule
Jian LIU ; Jie SONG ; Zhenxiu LIU ; Peigen XIAO ;
Chinese Traditional Patent Medicine 1992;0(01):-
Objective: To study the pharmacological effects of Zengxuean capsule (Radix Astragali, Indigo Naturalis, Cordyceps, etc) on anti inflammation.Methods:A few conventional models, such as the mouse pinna swelling induced by croton oil, were employed to determine the anti inflammatory activities of Zengxuean capsule.Results: Zengxuean capsule obviously inhibited the swelling of mouse pinna induced by croton oil, suppressed the edema of rat hind paw elicited by injection of 1% carrageenan, significantly depressed the increase of peritoneal capillary permeability in the xylene induced mice, and greatly decreased proliferation of granuloma led by implanting cotton pellet. It had an abatement effect of algesia induced by heat with tail flick method, and could not inhibit the swelling of pinna led by croton oil when mouse's adrenal was resected.Conclusion: Zengxuean capsule is an effective medicine on anti inflammation, and its acitivity is realized by adrenal cortical system.
4.In Vivo Intestinal Absorption Characteristics of Dioscin from Dioscorea nipponica Makino Extract in Rat
Xihui BAI ; Shiyu LIU ; Jing WANG ; Changli WANG ; Xiao SONG
Herald of Medicine 2017;36(6):610-613
Objective To study absorption characteristic of dioscin from Dioscorea nipponica Makino extract in rat intestine.Methods Single-pass intestinal perfusion (SPIP) model was used for rat in situ and HPLC was used to determine the concentrations of dioscin.The effects of different intestinal segments,drug concentration and P-glycoprotein (P-gp) inhibitor on intestinal absorption were investigated.Results Dioscin could be absorbed in the whole intestine,the absorption rate constant (Ka) and the apparent coefficient (Papp) of dioscin decreased following the sequence of ileum > duodenum =jejunum > colon.Absorption parameters of dioscin had no significant difference at different concentrations (40,80,120 mg·L-1).There were significant differences in Ka and Papp values between P-gp inhibitor group and no P-gp inhibitor group(P<0.05).Conclusion The saturate phenomena was not observed under the test range of drug concentration,and the absorption mechanism may be passive diffusion transport.Dioscin in Dioscorea nipponica Makino extract may be the substrate of P-gp.
5.The Effects ofNesfatin-1 in the Paraventricular Nucleus on Gastric Motility and Its Potential Regulation by the Lateral Hypothalamic Area in Rats
Song SHI ; Xiao LUAN ; Yang LIU ; Feifei GUO ; Luo XU
Progress in Modern Biomedicine 2017;17(25):4831-4836,4891
Objective:The current study investigated the effects of nesfatin-1 in the hypothalamic paraventricular nucleus (PVN) on gastric motility and the regulation of the lateral hypothalamic area (LHA).Methods:The projection of nerve ?ber and expression of nesfatin-1 were observed by retrograde tracing and fluo-immunohistochemistry staining;The nuclei microinjection and nuclei electrical stimulation,extracellular discharges of single unit neuron were used to observe the effects of nesfatin-1 on the GD neurons;Gastric motility recording in vivo were used to monitor the effects of nesfatin-1 on the amplitude of constriction and frequency of gastric motility in conscious rats.Results:Nesfatin-1 inhibited the majority of the GD-E neurons(1.97± 0.12 Hz vs.1.15± 0.07 Hz) and excited GD-I neurons (1.74± 0.10 Hz vs.3.04± 0.18 Hz) in the PVN,which were weakened by oxytocin receptor antagonist H4928 (GD-E:1.38± 0.08 Hz,P<0.05 vs.nesfatin-1;GD-I:2.49± 0.15 Hz,P<0.05 vs.nesfatin-1).Gastric motility experiments showed that administration ofnesfatin-1 in the PVN decreased gastric motility.Retrograde tracing and immunofluorescent staining showed that nucleobindin-2/nesfatin-1 and fluorogold double-labeled neurons were observed in the LHA.Electrical LHA stimulation excited the firing rate of GD-responsive neurons (GD-E:2.06± 0.12 Hz vs.4.23± 0.21 Hz,GD-I:1.61± 0.09 Hz vs.4.83± 0.25 Hz) in the PVN.Pre-administration of an antinucleobindin-2/nesfatin-1 antibody in the PVN strengthened gastric motility,decreased GD-E neurons (1.74± 0.10 Hz vs.3.04± 0.18 Hz) and excited the discharging of the GD-I neurons(4.15± 0.18 Hz vs.4.83± 0.25) induced by electrical stimulation of the LHA.Conclusion:Nesfatin-1 in the PVN could serve as an inhibitory factor to inhibit gastric motility,which might be regulated by the LHA.
6.Detection of EWSR1 gene translocation in paraffin-embedded Ewing family tumor by fluores-cence in situ hybridization
Xiao LI ; Chong LIU ; Guoxin SONG ; Guoqiang PING ; Qixing GONG
Chinese Journal of Clinical and Experimental Pathology 2015;(3):302-305,306
Purpose To evaluate the application of fluorescence in situ hybridization ( FISH) in detection of EWSR1 gene translocation in formalin-fixed paraffin-embedded tissue samples of Ewing family tumor ( EFT) . Methods Four cases of EFT were collected and their clinical pathological features were obsered. Interphase FISH was carried out in paraffin-embedded tissue of EFT cases, using a EWSR1 dual colar break-apart probe. Fifteen cases of other soft tissue tumor were selected as negative control. Results Translocation of EWSR1 was detected in four EFT cases, which may be a adjuvantly diagnositic value for the diagnosis of atypical cases. Conclu-sions FISH may serve as an adjunctive diagnostic tool in problematic cases of EFT, however, FISH results should be interpreted con-cerning clinical pathological features, morphological patterns and immunohistological results.
7.Comparative study of vertebral arterial blood flow between arteriosclerosis patients and healthy people
Wanhua SONG ; Yinghong DENG ; Jing XIAO ; Xiaowei LIU
International Journal of Biomedical Engineering 2014;37(6):359-361,后插5
Objective To conduct comparative study of vertebral artery blood flow of arteriosclerosis patients and healthy people using color Doppler ultrasound (CDUS),and to discuss the effect of arteriosclerosis on vertebral arterial blood flow.Methods Two hundred and eighty-five cases of vertebral artery test were collected and divided in to normal group of one hundred and thirty-five cases and vertebral artery sclerosis group of one hundred and fifty cases according to the presence of vertebral artery sclerosis.Time averaged maximum velocity (TAMV) and vertebral artery diameter(D) of vertebral artery were measured using CDUS technique.Unilateral vertebral artery blood flow and total blood flow were calculated.Results The vertebral artery TAMV and total blood flow of arteriosclerosis group was both lower than that of normal group (P<0.05).Left side vertebral artery diameters of the two groups were higher than that of the right side.Conclusions Arteriosclerosis can reduce vertebral artery TAMV and blood flow.The inner diameter of the left side vertebral artery dominates the artery blood flow.
8.Analysis of urinary markers for ornithine transcarbamylase deficiency by gas chromatography-mass spectrometry
Yuanzong SONG ; Hu HAO ; Guosheng LIU ; Xin XIAO ; Zineng WANG
Basic & Clinical Medicine 2006;0(07):-
Objective To develope both qualitative and quantitative analytic method of the four urinary markers,i.e.lactate,uracil,orotate and hippurate,from ornithine transcarbamylase deficiency(OTCD) by Gas Chromatography-Mass Spectrometry(GC-MS).Methods Urea in urine samples was decomposed with urease,and heptadecanoiate was added as internal standard,then protein was denatured with ethanol and removed by centrifugation.After evaporation,the residue was derivatized trimethylsilylly by BSTFA/TMCS,and analyzed by GC-MS.ResultsThe markers can be separated in total ion current profiles,with indentifications confirmed by mass spectra.The significantly elevated levels of lactate,uracil and orotate in urine from OTCD patient were droped to normal or subnormal levels,together with large amount of hippurate excretion in the urine,after clinical therapeutic measures,including introduction of benzoic acid,were performed.Conclusion GC-MS analysis of the urinary markers is a valuable tool for the diagnosis and evaluation of the therapeutic outcome of OTCD.
9.Clinial application of free posterlateral leg perforator flap in the reconstruction of soft tissue defects at oral and maxillofacial region
Jiancheng LI ; Peijun SONG ; Dongkun YANG ; Liang LIU ; Xiao HONG
Chinese Journal of Microsurgery 2017;40(3):248-251
Objective To investigate the outcome of free posterolateral leg perforator flap in the reconstruction of soft tissue defects of oral and maxillofacial area.Methods From February,2014 to August,2016,16 patients were performed defect reconstruction following oral cancer ablation with free posterolateral leg perforator flap including 3 cases of sequamous cell carcinoma of the tongue,6 cases of carcinoma of the buccal mucosa,7 cases of sequamouse cell carcinoma of the floor of mouth.The flap ranged from 5.0 cm×3.0 cm to 13.0 cm ×9.0 cm in size,and were adjected to the soft tissue defects of oral and maxillofacial area.The outcome of reconstruction was evaluated by considering the facial appearance,the swallowing and the speach function,the ranges of mouth opening and patient prognosis.Results All 15 transplanted flaps survived well and only 1 survived after disposing in time,because of vascular crisis.The donor sites were closed directly without donor-site morbidity.All patients were satisfactory with their facial appearance,the ranges of mouth opening and swallowing and speech function.Conclusion The free posterolateral leg perforator was an ideal free tissue for repairing functionally oral and maxillofacial defects,sinceit including some beneficial characteristic such as constant blood vessel,flexible and divese design,abundant and position-latent donor site tissues,small operation loss,flexible preparation and loss of major vascular nerves.
10.Optimization for Extracting Polysaccharide from Paris polyphylla Smith var. chinensis (Franch.) Hara in Shaan'xi by Response Surface Method
Yun LIU ; Peng ZHAO ; Xiao SONG ; Changli WANG
Herald of Medicine 2014;(9):1212-1215
Objective To select the optimum extracting method of polysaccharide from Paris polyphylla Smith var. chinensis(Franch. )Hara in Shaan'xi. Methods The optimum extraction technology and condition were determined by using response surface methodology and single factor experiment,with the extraction ratio of polysaccharides from Paris polyphylla Smith var. chinensis( Franch. ) Hara in Shaan'xi as indicator. Results The optimum extraction condition for the polysaccharides was as follows:extracting at 92 ℃ for 2. 6 h and with the liquid to solid ratio of 15 ( mLg). The average extraction yield of polysaccharide was 3. 22%under the optimum extraction condition. Conclusion The method is suitable for the extraction and determination of polysaccharides from Paris polyphylla Smith var. chinensis( Franch. ) Hara in Shaan'xi.