ThestudiesonthemaincomponentsinEucommiaulmoidesfromdomesticandabroadweresummarizedinthepaper, which can provide the reference for the effective component study and quality control of the Chinese herb.

Objective:To optimize β-cyclodextrin (β-CD) inclusion process for volatile oil in Yingxinning capsules. Methods:The content of volatile oil in theβ-CD inclusion compound as the evaluation index, the ratio of volatile oil toβ-CD, inclusion tempera-ture, inclusion time and stirring speed as the influencing factors, the inclusion process was studied using L9(34)orthogonal design. Re-sults:The best preparation conditions were as follows:the ratio of volatile oil toβ-CD was 1∶ 9, the inclusion temperature was 40℃, the inclusion time was 30min and the stirring speed was 800 r·min-1 . Conclusion: The preparation technology is simple, feasible and stable with high inclusion rate of volatile oil.

Objective:To establish the fingerprint analysis method for the aqueous extracts of Eucommia ulmoides from Enshi by HPLC. Methods:The fingerprint of aqueous extracts of ten batches of Eucommia ulmoides from Enshi were analyzed by HPLC. The columnwasWondaSilC18(250mm×4.6mm,5μm). Themobilephaseconsistedofacetonitrile-0.1% phosphoricacidwithgradient elution. The flow rate was 1. 0 ml·min-1 , the detection wavelength was 230 nm, the column temperature was 25℃, and the injection volume was 10 μl. Results:The fingerprint consisted of 12 common peaks. The similarity range of ten batches of Eucommia ulmoides calculated by similarity evaluation system for the chromatographic fingerprint of TCM(Version 2004 A)was 0. 596-0. 997. The standard fingerprint of Eucommia ulmoides was established by HPLC. Conclusion: The established HPLC fingerprint analysis method for Eu-commia ulmoides from Enshi is simple, stable and reproducible, which can effectively control the quality of Eucommia ulmoides from Enshi.

Objective:To investigate the clinical application of noninvasive high frequency oscillatory ventilation(nHFOV)and heated humidified high flow nasal cannula(HHHFNC)in sequential ventilator evacuation of preterm infants with very low birth weight with respiratory distress syndrome(RDS).Methods:A total of 88 preterm infants of very low birth weight with RDS were enrolled in the study, who had received endotracheal intubation invasive ventilation and were ready to be replaced by non-invasive ventilation at neonatal intensive care unit(NICU)of Xuzhou Central Hospital from May 2017 to January 2020.All premature infants were routinely treated with caffeine citrate.They were divided into two groups through random number table: nHFOV/HHHFNC group(45 cases)and continuous positive airway pressure(nCPAP)/oxygen hood group(43 cases). nHFOV was given after invasive ventilator removal and HHHFNC transition was followed after nHFOV withdrawal in the nHFOV/HHHFNC group, while nCPAP was given after invasive ventilator removal and oxygen hood was followed after nCPAP withdrawal in the nCPAP/oxygen hood group.The main observation consequences were compared with arterial blood gas indexes after invasive ventilator evacuation, weaning effect and the incidence of related complications.Results:(1)There were no statistically differences between the two groups in terms of gender, gestational age, birth weight, Apgar score at 1 min and 5 min after birth, the number of glucocorticoid usage in 24 h before delivery, the number of pulmonary surfactant usage, invasive ventilation time and RDS grading( P>0.05). (2)The PaO 2, PaCO 2and oxygenation index(OI=100×MAP×FiO 2/PaO 2)of the nHFOV/HHHFNC group at 1 h and 24 h after invasive ventilator removal showed significant difference compared with the nCPAP/oxygen hood group( P<0.05). The differences as the following listed were statistically significant( P<0.05)between the two groups, including the failure rate of invasive ventilation weaning during 72 h [9%(4/45)vs.26%(11/43)], the incidence of frequent apnea [7%(3/45)vs.23%(10/43)], the failure rate of nHFOV and nCPAP noninvasive ventilation weaning [4%(2/45)vs.21%(9/43)], the oxygen-used time [12.02(9.08~12.31)d vs.14.44(11.32~13.26)d] and the incidence of nasal injury [4%(2/45)vs.26%(11/43)]. (3)The time of the first noninvasive ventilation of nHFOV and nCPAP, the incidences of lung air leakage, neonatal necrotizing enterocolitis, grade Ⅲ to Ⅳ intraventricular hemorrhage, above stageⅡretinopathy, bronchopulmonary dysplasia and the mortality rate between the two groups showed no statistical significance( P>0.05). Conclusion:nHFOV and HHHFNC used in the sequential ventilator evacuation of RDS in preterm infants with very low birth weight could improve oxygenation, reduce CO 2retention, improve the success rate of machine weaning and reduce the occurrence of apnea and nasal injury.

Objective To study an improved automated method for isolation and purification of large amounts of human pancreatic islets from large mammals,and try to create conditions for preparation and isolation of large amounts of human islets.Methods An improved automated system was used to isolate and purify panreatic islets of sogs.Under the general anaesthesia(GA) condition,the pancreas of the dogs was via in situ vascular perfused using cold HC-A solution and then removed en bloc with duodenum and spleen.Then they were placed in cold UW aolutian.Intraductal collagenase-Ⅴ and pefabloc(4 ℃) was delivered with controlled perfusion.lslets were dissociated in system of Ricordi Chamber and purified islets separated with Ficoll density gradient centrifugation under controlled temperature.Digestion time,islets remaining trapped in exocrine tissue,final islet purity,insulin and C-pep secretory activity,and islet recovery were observed.The purified islets were observed under light microscope and electronic microscope after 24 h culture.Results The digestion time rate was(25.0?6.0) min,islets remaining trapped in exocrine tissue was(9.4?2.4)%,final islet purify rate was(89.7?3.5)%,islet recovery after digestion was(17.2?3.6)?104 IEQ/pancreas.Islet recovery after purification was(8.3?2.0)?104IEQ/pancreas.Insulin and C-pep secretory activity of the purified islets and their ultrastructure after 24 h culture were ideal.Conclusions Our improved automated method and facilities for isolation of canine pancreatic islets are reliable,The morphology and function of the procured islets are excellent and they can foreseeably be used for large-scale preparation of huma islets for clinical use.

Chickens were infected with chicken anemia virus (CAV) at one-day-old and vaccinated with La Sota vaccine 8 days later. Meanwhile, uninfected chickens were vaccinated as controls. At 7, 14 and 28 days post vaccination, the content of IgG,IgM,IgA and HI titer in serum, the number of T cells, IgG, IgM and IgA antibody producing cells in thymus, bursa and spleen, the proliferative response of T、B cells, the inductive activity of interleukin 2 (IL-2) and interferon (IFN) in thymus and spleen were tested. The results showed that the content of IgG, IgM, IgA and hemoagglutination inhibition (HI) titer in serum, the number of T cells, IgG, IgM and IgA antibody producing cells in thymus, bursa and spleen, the proliferative response of T cells and B cells as well as the inductive activity of IL-2 and IFN in thymus and spleen of infected-vaccinated chickens significantly decreased compared with the control. These results indicated that the immunofunction and immunoregulation were dropped post ND vaccination of CAV-infected chickens.

Objective To investigate the cytotoxicity of silica nanoparticles on vascular endothelial cells, and to clarify its action mechanism.Methods The 60 nm silica nanoparticle was selected and the invitro cultured human umbilical vein endothelial cells (HUVECs)were used as cell model.The HUVECs were divided into control and silica nanoparticle exposure groups with concentrations of 12.5,25.0,and 100.00 mg·L-1 .MTT assay was used for the determination of cell viability,lactate dehydrogenase (LDH)release assay for membrane integrity,flow cytometry (FCM)for intracellular reactive oxygen species (ROS)content,and real-time PCR assay for intracellular NF-E2-related factor 2 (Nrf2 ), heme oxygenase-1 (HO-1 ), superoxide dismutase 2 (SOD2 ) and glutamate-cysteine ligase catalytic subunit (GCLC)mRNA levels.Results The MTT results showed that the cell viabilities in each silica nnaoparticle exposure group were decreased compared with control group in a dose-dependent manner. Upon the silica nanoparticle exposure for 12 h,the cell viability was declined significantly only in 100 mg·L-1 exposure group compared with control group (P<0.05).When exposured for 24 h,the cell viabilities in 25.0, 50.0,and 100.0 mg·L-1 exposure groups were declined significantly compared with control group (P<0.05). Under the exposure to silica nanoparticle with the same dose, the cell viabilities were decreased along with the elongation of exposure time.LDH assay and FCM showed that except for that in 12.5 mg·L-1 exposure group, both the LDH activities in media and intracellular ROS levels in other exposure groups were increased compared with control group (P<0.05 ). The results of real-time fluorescence PCR showed that the mRNA levels of Nrf2, HO-1,SOD2 and GCLC in 100 mg·L-1 silica nanoparticle exposure group were increased significantly compared with control group (P<0.05).Conclusion Silica nanoparticles have toxicity to vascular endothelial cells,which includes reducing cell viability,membrane integrity destruction,induction of ROS generation,and tranSCriptional regulation of redox-related factors. Oxidative damage is one of the mechanisms of vascular endothelial toxicity mediated by silica nanoparticles.

Translational medicine,as an important form of research-based medicine,is key to research hospitals.Analysis in the paper holds that such hospitals should highlight top-level design in its medical system building,rely on characteristic and advantageous disciplines,target research outcome applications,take the pathway of overlapping and fusion,and the synergy mechanism as the guarantee. The paper introduced the efforts of the hospitals'experiences in innovative clinical practice of research during the development of the translational medicine system,in an organized,planned,targeted,and measurable manner.It is concluded that the innovative outcomes of the effort help elevate medical competence of the hospital as a whole.

Objective To investigated the role of the autophagy lysosomal pathway in PD cells and the possible molecular mechanisms. Methods A dopaminergic neuronal injury model was induced by 6-OHDA in PC12 cells . Autophagosomes in PC12 cells were examined by transmission electronmicro-scopy( TEM ). The expression of LC3- Ⅱ , Cathepsin B were assayed by western blot analysis. Results TEM revealed that the autophagosomes were increased in PC12 cells after 6-OHDA treatment and appeared apoptosis. The LC3-Ⅱ (2h:52.57 ±2.27,4h:56.83 ±3.51,6h:73.43 ±5.41,12h:103.90 ±2.57,24h: 100.40 ±3.91 )and Cathepsin B expression ( model group: 113.80 ± 4.46; normal group 35.89 ± 3.40) were increased after 6-OH DA treatments (P ＜ 0.05 or P ＜ 0.01 ). Conclusion The results indicate that autophagy lysosome pathway is involved in 6-OHDA-induced cell death in PC12 cells.

Objective To explore tolerance-related factors of enteral nutrition(EN) by nasogastric (NG) tube in ICU patients, and to provide several nursing strategies for improving the patients' tolerance. Methods 83 patients using EN with NG tube in ICU were collected.Tolerance-related factors of EN were analyzed by multivariate Logistic regression analysis. Results Among the 83 patients, 36 patients (43.3%) could tolerate very well, 47 patients (56.6%) couldn't tolerate.After treatment 27 patients' tolerance was fair, the other was poor.Multivariate Logistic regression analysis showed that age, APACHE-Ⅱ score, the time of beginning EN, albumin level, drug administration by NG tube or not were the major factors affecting tolerance of NG tube feeding. Conclusions Patients' feeding with NG tube was well-tolerated in ICU.Besides the factors from patients as the severity of disease status and level of serum albumin,the time of beginning EN, drug administration by NG tube were significantly correlated with tolerance.