2.Preparation and detection of centromere-associated protein E antibody
Xin MA ; Changjun ZHU ; Wei JIANG
International Journal of Biomedical Engineering 2016;39(2):74-78,后插2
Objective To prepare centromere-associated protein E(CENP-E)polyclonal antibody with specificity by using New Zealand white rabbits.Methods Prokaryotic expression plasmid of pHis-CENPEC410 was constructed by molecular cloning technique and then transformed into competent cells of E.coli BL-21 (DE3).HisCENPEC410 fusion protein was induced by isopropyl β-D-thiogalactoside (IPTG) and purified by affinity chromatography using Ni-NTA beads.The purified protein was used as antigen to immune New Zealand white rabbits to produce spccific polyclonal antibody of CENP-E.The antibodies serum was detected by immunoblotting and co-immunoprecipitation,and the purified antibodies were detected by immunofluorescene staining.Results The results of immunoblotting and co-immunoprecipitation demonstrated that the antibody serum was effective and the purified antibody could be applied to immunofluorescene test.Conclusions CENP-E polyclonal antibody with high specificity and sensitivity was obtained,which lay the foundation for the follow-up study of CENP-E.
3.Literature review and comments on implementation outcomes of the essential medicine system in China
Wei WANG ; Wenqiang YIN ; Yan WEI ; Xin MA ; Yankui ZHAO
Chinese Journal of Hospital Administration 2013;29(7):481-487
Objective A systematic review of implementation outcomes of the essential medicine system in China to identify scientific evidences for a better system.Methods A systematic review is made to extract data from the research papers on outcomes of the essential medicine system,followed by an analysis and description of such data.Results Of the 87 papers included,most of them focused on primary care institutions,while four of them on residents or patients,and one of them on pharmaceutical enterprises.The study found the medical institutions with rising availability of essential drugs,lowered medicine costs,rising or dropping business volume,and apparent drop of out-of-pocket expenses for patients.These have encouraged rational drug use.Evidences in hand indicate expected outcomes from the essential medicine system.Conclusion Current researches on the system focus on primary care institutions in developed areas in China,lacking rigorous design.Studies of broader scale,further depth and more rigorous designs of the implementations of the system are recommended for evaluation of the impacts and outcomes of the system on various stakeholders of the policy.
4.Tissue distribution of s-oleylpropanolamide in rats detected by liquid chromatography with tandem mass spectrometry.
Chengwei ZHENG ; Xin JIN ; Yanhui SHEN ; Ang MA ; Wei LU
Acta Pharmaceutica Sinica 2011;46(8):962-7
This paper is to report the development of a rapid and sensitive method for the determination of s-oleylpropanolamide (OPA) in various tissues of rat (brain, heart, lung, liver, spleen, small intestine, kidney, adipose tissue and muscle), and to assess the applicability of the assay to tissue distribution. OPA was extracted by liquid-liquid extraction method with undecylenoylethanolamide as an internal standard. The concentrations of OPA were determined by LC-MS/MS after a single intragastric dose of 50 mg x kg(-1) at 4 time points (5 rats per group). With multiple reactions monitoring mode (MRM) the limit of quantification (LLOQ) was determined at 1 microg x L(-1). The calibration curve was linear from 1 to 2 x 104 microg x L(-1) (r > or = 0.999 0) for tissue homogenates. Validation parameters such as accuracy, precision and recovery were found to be within the acceptance criteria of the assay validation guidelines. The highest concentration was found in small intestine (the highest time point is 15 min) and heart (the highest time point is 90 min). The assay is rapid, sensitive and applicable to studying tissue distribution of OPA in rats.
5.Role of transient receptor potential ion channel 1 in spinal dorsal horn neurons in maintenance of neuropathic pain in rats
Wei ZHANG ; Xin ZHAO ; Chongxue CHENG ; Xiaoping GU ; Zhengliang MA
Chinese Journal of Anesthesiology 2014;34(1):37-39
Objective To evaluate the role of transient receptor potential ion channel 1 (TRPA1) in the spinal dorsal horn neurons in maintenance of neuropathic pain in rats.Methods Fifty-six adult male SpragueDawley rats,weighing 200-250 g,were randomly divided into 4 groups (n =14 each):sham operation group (group S); chronic compression of dorsal root ganglia (CCD) group; CCD + dimethyl sulfoxide group (group D); and CCD + TRPA1 blocker HC-030031 group (group H).CCD was produced by infiltrating the L5 intervertebral foramen with 50 μl of a hemostatic matrix (SURGIFLO) in anesthetized rats in CCD,D and H groups.In D and H groups,10% dimethyl sulfoxide 20 μl and HC-030031 50 μg were injected intrathecally at 7 days after CCD operation,respectively.Paw withdrawal threshold to mechanical stimulation (PWMT) was measured at 1 day before operation (T0),at 1 h before intrathecal administration (T1),and at 1,2,4,6,8,and 24 h after intrathecal administration (T2-7).Six rats in each group were sacrificed at T4 and T7,the L3-5 segments of the spinal cord were obtained for determination of TRPA1 expression in the spinal cord by Western blot.Results Compared with group S,PWMT was significantly decreased at T1-7,the expression of TRPA1 in the spinal cord was up-regulated at T4 and T7 in CCD and D groups,and the PWMT was decreased at T1 and T5-7 and the expression of TRPA1 was up-regulated at T7 in H group (P < 0.05).Compared with CCD group,the PWMT was significantly increased at T2-5 and the expression of TRPA1 was down-regulated at T4 in H group (P < 0.05).Conclusion TRPA1 in the spinal dorsal horn neurons is involved in the maintenance of neuropathic pain in rats.
6.Asymptomatic cardiovascular changes in children with adenoid hypertrophy
Xin SUN ; Wei LI ; Hang ZHANG ; Xiaolin MA
Chinese Pediatric Emergency Medicine 2013;20(3):287-288
Objective To detect the asymptomatic cardiovascular changes in children with adenoid hypertrophy.Methods One hundred and twenty children with adenoid hypertrophy underwent both chest X-ray and echocardiography before adenoidectomy,and echocardiography 6 months after operation.Results No child showed an increase in the cardiothoracic ratio on X-ray.But preoperative echocardiography showed an increase in pulmonary artery pressure [(22.6 ±3.6) mm Hg,1 mm Hg =0.133 kPa],a decrease in E/A (1.01 ± 0.17),and an increase in right ventricular end-diastolic diameters [(1.88 ± 0.18) cm].While after operation,pulmonary artery pressure decreased to(17.1 ± 3.2) mm Hg,E/A increased to 1.25 ± 0.12,and right ventricular end-diastolic diameters decreased to (1.67 ± 0.11) cm.Each index change before and after operation was statistically significant(P < 0.05).Conclusion Adenoid hypertrophy can result in clinically asymptomatic cardiopulmonary changes.Early diagnosis and treatment of this disease can prevent serious cardiopulmonary complications.
7.Follow-up study on auditory sensory gating P50 in schizophrenia patients with homicide
Hongxing WANG ; Xin MA ; Wenfeng ZHEN ; Yuping WANG ; Wei MAO
Chinese Journal of Nervous and Mental Diseases 2010;36(3):153-156
Objective To investigate the auditory sensory gating P50 in schizophrenia patients with homicide during three months of follow up. Methods Twenty-five patients with schizophrenia patients with homicide and 27 healthy adults matched with age and education level were recruited in the present study. P50 was recorded in twenty-seven normal controls and twenty-five schizophrenia patients at the baseline. P50 was repeatedly recorded in eleven patients who completed the follow-up at three months following antipsychotics treatment. The psychotic symptoms of patients were assessed with Positive and Negative Syndrome Scale (PANSS) at the same time. Results ①In comparison with normal controls, schizophrenia patients with homicide showed increased S2-P50 amplitude (P<0.01), increased S2/S1 ratio (P<0.01), decreased S1-S2(P<0.05), and 100(1-S2/S1) (P<0.01) at the baseline and after three months treatment. The differences in P50 amplitude, latency, and P50 suppression index between the baseline and after three-month treatment in schizophrenia patients with homicide were not significant (P>0.05). ② Schizophrenia patients with homicide after three-month treatment showed decreased PANSS total scale, positive scale, general psychopathology scale, and six symptoms scales such as lack of response, thought disorder, activation, paranoid, depression, and aggression (P<0.05). ③ No significant correlations were found between the S2/S1 ratio, S2-S1, and 100(1-S2/S1) with disease duration, PANSS scores, and six symptoms scales at either baseline or after three-month treatment (P>0.05). Conclusions Schizophrenia with homicide has sensory gating deficits and P50 suppression index might be a stable trait maker for schizophrenia with homicide.
8.Efficacy and adverse reactions of different stimulus dosage of modified electroconvulsive therapy for depressive episode
Yanping REN ; Wei JIANG ; Yanru LI ; Zhihong LIU ; Xin MA
Chinese Journal of Behavioral Medicine and Brain Science 2016;25(8):713-717
Objective To evaluate the antidepressant efficacy and adverse reactions of 3 different stimulus dosage of modified electroconvulsive therapy ( MECT) in patients with depressive episode. Methods 120 patients with depressive episode were randomized into low dosage group ( n=40) ,medium dosage group ( n=40) and high dosage group ( n=40) . Low dosage were 50%× age,medium dosage was 70%×age,high dosage was 80%×age . All patients received 6 treatments. Hamilton depression scale?17(HAMD?17) was used to evaluate the clinical symptoms at baseline,3 and 6 treatments. Effects and adverse reactions were compared among three groups.Results Compared with baseline the HAMD?17 scores of the 3 groups were significantly improved after 6 treatments( t=24.026, P=0.000;t=26.541, P=0.000;t=25.904, P=0.000) , but there were no statistically significant differences among the three dosage groups(F=0.409, P=0.665). Compared with low dosage group((27.2±5.4)%),the HAMD?17 scores reductive ratio of medium dosage group((34.3±6.8)%) and high dosage group((33.9±6.9)%)) were significantly improved after 3 treat?ments ( t=-5.513, P=0.000;t=-4.785, P=0.000). Compared with the low dosage group,the incidence rate of headache,nausea and vomiting,delirium were significantly higher in high dosage groups( headache:χ2=14.532, P=0.000;nausea and vomiting:χ2=13.333, P=0.000;delirium:χ2=14.907, P=0.000) . The re?covery time was significantly longer in medium dosage group ( ( 10. 5 ± 1. 6 ) min ) and high dosage group ((11.2±1.8)min) than that in low dosage group((8.8±1.2)min)( t=-5.144,=0.000;t=-6.889, P=0.000).Conclusion Different stimulus dosage of MECT for depressive episode has equivalent curative effect after 6 treatment . Medium dosage and high dosage treatments appear to have an early onset of efficacy,but may also be associated with more adverse reactions.
9.Analysis of 114 Cases of Serious ADR in Our Hospital
Hongyan ZHUANG ; Shanshan LIU ; Hongbing HAO ; Wei GUO ; Xin MA
China Pharmacy 2016;27(35):4933-4936
OBJECTIVE:To investigate the characteristics of serious ADR in psychiatric hospital,and to provide reference for effective and safe use of drugs in the clinic. METHODS:114 cases of serious ADR in our hospital from 2004 to 2015 were ana-lyzed retrospectively in terms of general information,primary disease,route of administration,dosage form,drug types,organs or systems involved in ADR and clinical manifestations,top 5 ADR-inducing drugs and main clinical manifestations,etc. RESULTS:Of 114 serious ADR cases,the number of female was more than that of male(71/43). Patients aged 21-30 years old took up the greatest proprotion(35 cases,30.70%). The main involved primary disease was schizophrenia(54 cases,47.37%). Oral adminis-tration-induced ADR was most common(103 cases,90.35%). The main involved drugs were antipsychotics,occupying the great-est proportion(75 cases,65.79%). Digestive system involved was the most common(53 cases,42.74%), Olanzapine tablets had the highest incidence of serious ADR (23 cases,18.55%),the main clinical manifestation were both abnormal liver function. There were 8 cases of new serious ADR (7.02%). Most of the ADR can be cured after drug withdrawal or countermeasures,no death case was found. CONCLUSIONS:Psychiatric drugs can induce serious ADR as treat psychiatric disease,among which the in-cidence of ADR induced by Olanzapine tablets is the highest and mainly manifestes digestive system symptoms. It is suggested to strengthen serious ADR monitoring to promote the safe use of drugs.
10.Municipal trusteeship of district-launched medical institutions: experiment at Beijing Children′s Hospital
Xiaoying NIE ; Fang DAI ; Wei MA ; Xin NI
Chinese Journal of Hospital Administration 2017;33(9):648-651
The paper introduced the background and concepts of municipal trusteeship of district-launched medical institutions, with the trusteeship of women and children′s hospital of Shunyi district as an example.In addition to the main approaches and contributions in improving hospital management, delivery of quality medical resources to primary care, and capacity building, the authors called for the support for standardized healthcare, respect for original hospital culture, and sustained government support to the hospital in question among other points, for reference of further public hospital reform.