Objective To explore the absorption characteristics of aluminum hydroxide adjuvant with inactivated enterovirus 71(EV71).Methods The morphology,purity and particle size distribution of inactivated EV71 particles were analyzed by transmission electron microscope,size exclusion chromatography HPLC(SEC-HPLC) and dynamic light scatter(DLS),and the morphology of aluminum hydroxide adjuvant nanoparticles was observed by transmission electron microscope.Using inactivated EV71 antigen content(4 000,6 000,8 000,10 000,11 000,12 000,13 000,14 000,20 000,30 000 U/mL),aluminum hydroxide adjuvant concentration [0.35,0.25,0.17,0.085 mg/mL(aluminum content)],adsorption time(0.30 and 120 min),ionic strength(sodium chloride concentration of 0.15,0.75 and 1.25 mol/L)and phosphorus-aluminum molar ratio(P/Al,0.15,0.64,2.08 and 7.87) as variables,the adsorption characteristics of aluminum hydroxide adjuvant with inactivated EV71 antigen were investigated.Results Inactivated EV71 particles mainly existed in the form of intact virus particles with a diameter of about 30 nm;Aluminum hydroxide adjuvant showed the characteristics of nanocrystallization,and the particle size was distributed within 200～700 nm.The inactivated EV71 antigen at the concentration of no more than 11 000 U/mL was completely absorbed by aluminum hydroxide adjuvant of 0.35 mg/mL(aluminum content),and no free antigen was detected in the supernatant;while from 12 000 U/mL,the content of free antigen in the supernatant increased with the increase of antigen content;the inactivated EV71 antigen of 250 U/mL was completely absorbed by various concentrations of aluminum hydroxide adjuvant,and no free antigen was detected in the supernatant;the adsorption effect of aluminum hydroxide adjuvant consistent after incubation for different time,and no free antigen was detected in the supernatant.Under the conditions of single dose of vaccine with aluminum hydroxide content(0.35 mg/mL) and inactivated EV71 antigen content(250 U/mL),sodium chloride ion strength had no effect on the adsorption of inactivated EV71 virus,while phosphate ion concentration significantly effected the adsorption.Conclusion Aluminum hydroxide adjuvant in a single dose of vaccine completely absorbed inactivated EV71 antigen,and group replacement played an important role.

ObjectiveTo investigate the roles of transforming growth factor-β2(TGF-β2)in allergen-induced asthmatic airway inflammation and remodeling and its potentials as an intervention target.MethodsSix female BALB/c mice were immu-nized with hepatitis B virus core antigen(HBcAg)/TGF-β2 virus-like particles(VLPs)presenting TGF-β2epitope. The TGF-β2 specific IgG response in serum of mice was detected by ELISA,and the neutralizing activity of antibody against TGF-β2 was detected by cell test. Acute airway allergic inflammation was induced by a short-term stimulation procedure of ovalbumin(OVA),and the activity of TGF-β in bronchoalveolar lavage fluid(BALF)of mice was detected by cell test. ELISA was used to detect the level of OVA-specific IgE in serum of mice. The total number and type of inflammatory cells in BALF were counted under optical microscope,and the levels of cytokines were detected by ELISA.After sustained stimulation of OVA to induce airway fibrosis,the collagen deposition was detected by Masson′s trichrome staining in lung tissue sections,and the soluble collagen content was quantitatively analyzed by Sircol collagen assay kit.ResultsVLPs immunization induced TGF-β2 specific IgG response,and the antiserum effectively neutralized TGF-β2activity. In the mouse model of acute airway allergic inflammation,VLPs immunization down-regulated the level of active TGF-β in airway,significantly elevated the production of OVA-specific IgE in serum,suppressed the infiltration of airway inflammatory cells mainly containing eosinophils,and significantly promoted the accumulation of Th2 inflammatory cytokines in airway. In chronic pulmonary fibrosis model,VLPs immunization significantly down-regulated collagen deposition and soluble collagen level in lung tissue.ConclusionHBcAg/TGF-β2 VLPs immunization was an effective means to regulate the effect of TGF-β2. TGF-β2 basically showed suppressive effects on airway inflammatory response induced by allergens,while promoted the fibrosis.

Objective To observe the effect of diabetic retinopathy on endothelial progenitor cells (EPCs)from peripheral blood.Methods Sixty male Wistar rats were divided into control group and diabetes group.The rats in diabetes group were induced with streptozotocin(STZ)injection for diabetic retinopathy model.Flow cytometry was used to identify and count the number of EPCs from peripheral blood at 1 week.1,3 and 6 months after injection.All eyeballs were examined by hematoxylin and eosin (HE)staining,periodic acid-Schiffs(PAS)staining of trypsin-digested retinal vessels flat preparation and transmission electron microscope.EPCs count,and the relationship between DR morphological changes and EPCs count were compared and analyzed.Results The quantity of EPCs from peripheral blood at 1 week,1,3 and 6 months after STZ injection were 25±7,28±8,39±7,43±7 cells per 200 000 monocytes respectively,which decreased compared with the control group 45±4 cells per 200 000 monocytes(F=8.933,P＜0.0 1).The quantity of EPCs was gradually increased at 1 week,1,3 and 6 months after STZ injection,accompanied with responsive pathological changes of retinal structure and vessels.The thickness of retina at 1 week and 1 month after injection were reduced slightly.The number of retinal ganglion cells reduced,with the time passing by.Endothelial cells were edema,mitochondrial was swollen,capillary basement membrane was thicken,lumen was significant stenosis,lumen occlusion and retinal artery aneurysm were observed at 6 months after STZ injection.Conclusion The number of EPCs increases gradually throughout the development of DR.

Atherosclerosis (AS) is a multi-factor disease,with complex etiology.It is associated with vascular abnormalities and changing vascular wall composition.AS mainly involve large and medium sized arteries,which may cause multiple organ lesions including heart and brain tissue ischemia and necrosis,myocardial infarction,stroke and other serious diseases.Its pathogenesis has not been finally clarified.This article gives review on pathological changes,etiology and mechanism of AS,as well as its imaging performance.

OBJECTIVETo observe the effect of Xingnaojing Injection combined with minimally invasive percutaneous drainage on brain edema and content of serum aquaporin-4 (AQP4) in patients with moderate hypertensive basal ganglia hemorrhage, and discuss the treatment mechanism of Xingnaojing injection combined with minimally invasive percutaneous drainage for cerebral hemorrhage.

METHODForty-two patients with moderate (25-50 mL) hypertensive basal ganglia hemorrhage (< 24 h) were selected and randomly divided into two groups: the observation group (n = 22) and the control group (n = 20). The neurological severity score were evaluated by the NIHSS (national institutes of health stroke scale), the volume of brain edemas were measured by head CT, the serum levels of AQP4 were determined by ELISA method on admission and 1 and 2 weeks after treatment.

RESULTOn admission, there was no significant difference in the scores of NIHSS, the volume of brain edemas and the level of serum AQP4 between the observation group and the control group. At the end of the first week after the treatment, the score of NIHSS of the observation group were lower than that of the control group, with significant different (P < 0.05); the observation group showed reduced volume of brain edemas than that on admission (P < 0.05), whereas the control group the control group showed increased volume of brain edemas than that on admission; the control group displayed increased level of serum AQP4 than that on admission, but without significant difference; the observation group displayed decreased level of serum AQP4 than that on admission (P < 0.05). At the end of the second week after the treatment, the control group showed decreased score of NIHSS than that on admission and at the end of the first week after treatment (P < 0.05). Compared with the control group, the observation group showed a much lower score of NIHSS (P < 0.01), the control group displayed reduced volume of brain edemas than that on admission and at the end of the first week after treatment, but the observation group was even lower than the control group. Both of observation and control groups displayed significantly reduced level of AQP4 (P < 0.05), but the observation group showed a lower AQP4 level than that of the control group (P < 0.05).

CONCLUSIONThe therapy of Xingnaojing injection combined with minimally invasive percutaneous drainage could remarkably reduce brain edema, and promote neural functional recovery, thus could be selected as a therapeutic regimen for patients with moderate hypertensive basal ganglia hemorrhage.

Aged ; Aquaporin 4 ; blood ; genetics ; Basal Ganglia Hemorrhage ; blood ; drug therapy ; etiology ; surgery ; Brain Edema ; blood ; drug therapy ; etiology ; surgery ; Drainage ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Humans ; Hypertension ; complications ; Male ; Middle Aged ; Treatment Outcome

OBJECTIVE: To investigate the pharmacokinetics of irinotecan (CPT-11) in SD rats with immunological liver injury. METHODS: The animal model of immunological liver injury was established by intraperitoneal injection of lipopolysaccharide (LPS) plus Bacille-Calmette-Guerin (BCG) in rats. Rats were randomly divided into two groups; normal control group and immunological liver injury model group. The two groups were injected with CPT-11 (20 mg · kg-1) via tail vein and plasma concentrations of CPT-11 and its metabolite SN-38 were determined by HPLC. Pharmacokinetical parameters were calculated. RESULTS: Compared with the normal control group, AUC0-24h, AUC0-∞ and ρmax of CPT-11 in immunological liver injury rats were increased significantly (P < 0.05), but AUC0-24h, AUC0-∞ and ρmax of SN-38 were decreased significantly (P < 0.05). CONCLUSION: Under the state of immunological liver injury, the hydrolysis of CPT-11 is inhibited significantly. The underlying mechanism may be related to the down-regulation of the expression of carboxylesterase 2 by LPS. Copyright 2012 by the Chinese Pharmaceutical Association.

Word frequency and co-word analysis of key words and comparative analysis of hot spots and topics in core journals-published papers on health policy in China from 2004 to 2008 and from 2009 to 2013 showed that health policy research and health system reform promoted each other and developed with each other, the research tipics on health policy were scattered and expanded rapidly , the focus of researches was more clear with stress laid on their macro-aspects, and the research methods were variable.

Child ; Female ; Humans ; Job Syndrome

Objective To investigate the analgesic efficacy of intravenous administration of lidocaine in patients following laparoscopic cholecystectomy. Methods Twenty-five ASA Ⅰ or Ⅱ patients, aged 30-55 yr,weighing 50-70 kg, scheduled for laparoscopic cholecystectomy, were enrolled in this study. Lidocaine 1.5 mg/kg was injected intravenously immediately before anesthesia. Anesthesia was induced with intravenous fentanyl 2 μg/kg, propofol 2 mg/kg and rocuronium 1 mg/kg and maintained with inhalation of isoflurane (end-tidal concentration 1.5%-2.0%) and intermittent iv boluses of rocuronium after tracheal intubation. Lidocaine was infused abdominal intravenously at a rate of 1.5mg·kg-1·h-1 form the end of ofperation to 24 h after operation. The degree of abdominal pain and shoulder pain was assessed with VAS score at 1, 6, 12 and 24 h after operation. The effective analgesia was defined as VAS score of ≤ 3. The adverse reactions were recorded. Results The effective analgesia rate was 100% within 24 h after operation. No adverse reactions occurred. Conclusion Intravenous administration of lidocaine exerts satisfactory analgesia in patients after laparoscopic cholecystectomy.