Objective To establish the separation and expansion method of human umbilical cord derived mesenchymal stem cells (hUCMSCs) and explore the influence of 1,25 (OH)2VD3 on hUCMSCs in vitro.Methods UCMSCs were cultured from adherent tissue pieces and detected by immunohistochemistry.Taking the third generation with good growth state UCMSCs make intervene experiment.Set 10-7 mol/L,10-9mol/L and 10-11 mol/L 3 kind of concentration of 1,25(OH)2VD3 as the experimental group,and a control group (DMEM medium).The morphologic change of UCMSCs was observed by inverted microscope.Observe the cell proliferation by the method of MTT.Detect alkaline phosphatase assay and type Ⅰ collagen assay from immunohistochemistry.And the calcium tubercle formation would be examined after 21 days.Results UCMSCs were cultured from adherent tissue pieces and strongly positive for CD44,CD105 and negative for CD34,CD45.consistent with the hUCMSCs characteristics.Under different concentration of 1,25 (OH)2VD3hUCMSCs proliferation were promoted within 7 days but were suppressed beyond 7 days.The high doses group ( 10-7 mol/L group ) obvious inhibitted the stem cell proliferation.Different concentrations of 1,25 (OH)2VD3 and days have interactive effect (P ＜ 0.05).The differences between different groups with ALP and type Ⅰ collagen assay has statistical difference (P ＜ 0.05).The secretion of ALP and type Ⅰ collagen assay of 10-7 mol/Lconcentration group was higher than others.Typical mineralization nedus was found in intervene groups.Conclusion HUCMSCs can be successfully cultured from the adherent tissue pieces.1,25(OH)2VD3 can effectively induce hUCMSCs to differentiate into osteoblasts in vitro.

Objective To evaluate the differences of the lower extremity atherosclerosis between patients with and without type 2 diabetes using dual-source CT angiography.Methods Dual-source CT angiography of lower extremity was performed in 87 patients with (n=30)or without (n= 57 )diabetes.Extent of luminal stenosis,and the type,distribution and range of the plaques were compared.Results 342 plaques in 540 segments (63.3%)in diabetic patients,and 500 plaques in 1 026 segments (48.7%)in non-diabetic ones were detected respectively.Compared with non-diabetic patients,the diabetic ones had a higher overall incidence of plaques (P <0.05).Calcified plaques were the most common in both kinds of patients,and the incidence of mixed plaques was high-er in diabetic patients than that in non-diabetic ones (35.6 % vs.28.4%,P <0.05).Light to moderate stenosis occurred in most diabetic patients,and fewer occlusion was found compared with non-diabetic ones (9.1% vs.1 7.0%,P <0.05).The most common sites of the plaques in diabetic patients were located at distal small arteries below the knee.However,those were located at proximal arteries above the knee for non-diabetic ones.The involvement of atherosclerosis in diabetic patients was more diffused,and the de-gree of Ⅳ (75%-100%)was higher than that in non-diabetic ones (P <0.05).Conclusion Atherosclerosis in lower extremity on dual-source CT angiography is very common in diabetic patients with multi-segmental,diffused,non-obstructive involvement of dis-tal small arteries below the knee.

Objective To investigate the application value of methylene blue excretion test in early reasonable nutritional support for severe traumatic brain injury.Methods One hundred and thirty-three cases of severe traumatic brain injury admitted to hospital from January 2010 to June 2012 were chosen as treatment group,while the 127 cases of similar patients admitted to hospital from January 2007 to December 2009 were chosen as control group.Patients in treatment group underwent methylene blue excretion test in 3 days,8 days,15 days after injury,and the nutritional support ways were determined according to the elimination time of methylene blue in patients' urine.The control group conventionally receive enteral nutrition support therapy firstly,after 15 days if they still cannot be tolerant of the enteral nutrition,then parenteral nutrition therapy were adopted.The weight,serum albumin and hemoglobin circumstances of the two groups were determined and the complications were recorded.Glasgow coma score (GCS) of 3 months after injury were followed up.Results There was no significant difference on the average body weigh between these two groups before treatment.The average body weight of the treatment group was significantly higher than that of control group after 3 months treatment((56.3 ± 5.5) kg vs.(52.6 ± 5.3) kg,t =5.93,P ＜ 0.01).The serum albumin and hemoglobin of 14 d,21 d after injury were significantly higher than those of the control group (serum albumin of 14 d:(32.7 ±3.4) g/L vs.(28.8 ±3.1) g/L; serum albumin of 21 d:(34.3 ±3.8) g/L vs.(30.7 ±3.3) g/L;hemoglobin of 14 d:(113.4±12.5) g/L vs.(102.2 ±11.6) g/L;hemoglobin of 21 d:(118.5 ±13.3) g/L vs.(106.7 ± 12.4) g/L.Nutritional status of treatment group was significantly better than that of the control groupall P ＜ 0.05).After three months,the effective rate of treatment group (93.23％ (124/133)) was significantly higher than that of the control group (84.25％ (107/127)),the difference was statistically significant (x2 =5.29,P ＜ 0.05).Conclusion Determining the early reasonable nutrition support ways for patients with severe traumatic brain injury according to the elimination time of methylene blue in the urine,can provide comprehensive nutrition to patients,enhance their body resistance,reduce the incidence of complications,and create an important clinical value for improving prognosis.

Objective To analyze the differential expression of Stathmin in human cells infected with human-tropic porcine endogenous retrovirus(PERV)and to explore the potential molecular effect of human-tropic PERV on human cells.Methods HEK293 cells were infected with the human-tropic PERV infectious molecular clone.PCR,real-time RT-PCR and immunofluorescence analysis were applied to confirm that HEK293 cells were infected.Then real-time RT-PCR and Western blot were carried out to analyze the differential expression of Stathmin at the mRNA level and protein level,respectively.Results HEK293 cells were infected by human-tropic PERV.Real-time RT-PCR and Western blot analysis showed that Stathmin was up-regulated in HEK293 cells infected with PERV compared with the control cells.Conclusion Stathmin was up-regulated in HEK293 cells infected with human-tropic PERV.These studies will be helpful for revealing the interaction of PERV and human cells,and for understanding the molecular effect of humantropic PERV on human cells.In addition,it suggested that PERV infection may infect cell growth and physiological functions,even be pathogenic.These will help to clarify the biologic characteristics of PERV and evaluate the safety of PERV in pig to human xenotransplantation.

Objective To investigate the factors associated with delay in decision to seek treatment in patients with acute myocardial infarction(AMI) in Beijing. Methods This prospective,cross-sectional,multicenter survey was conducted from November 1,2005 and December 31 ,2006. The participants consisted of 799 patients with STEMI admitted within 24 h of symptom onset to 19 hospitals in Beijing. Data were collected by semi-structured interviews and medical records review. The patients were categorized into an early decision group and the a late decision group based on the 30 min cut-off. Results The median(25%,75%) decision delay in STEMI patients was 60(20, 180)min. Factors associated with late decision in an univariate analysis were age ≥65 years, retirement or unemployment, history of myocardial infarction,symptom onset at home and intermittent symptoms, whereas presence of bystanders such as friends,coworkers or even strangers,unbearable symptoms,dyspnea,sweating,syncope and attribution of symptoms to cardiac origin were related to early decision. Multivariate logistic analysis showed that history of myocardial infarction,absence of syncope, intermittent symptoms,bearable symptoms and attribution of symptoms to noncardiac origin were independent predictors of decision delay＞30 min. Patients in the early decision group had more chances to receive acute reperfusion therapies(P=0.001) and shorter time intervals from symptom onset to reperfusion therapies(P＜0.001). Conclusions To a great extent patients with AMI in Beijing delayed in decision to seek treatment. History of myocardial infarction, symptom characteristics and symptom attribution were associated with decision delay.

Objective To study the mechanism of anti-inflammation and bacteriostasis effect of Qinlian Liyan Heji. Methods To assess the anti-inflammatory effect, blood capillary permeability in mice was increased by acetic acid, the swelling of toe in rats was induced by albumen, and granuloma was induced by cotton ball in mice.The agar dilution method was used to check the minimal inhibitory concentration of Qinlian Liyan Heji on Staphylococcus aureus, Staphylococcus epidermidis, Moraxella catarrhalis, Klebsiella pneumoniae.The microdilution method was used to detect the minimal inhibitory concentration of Qinlian Liyan Heji on group A streptococci, Streptococcal pneumonia and Haemophilus influenzae. Results Contrast to the negative control group, Qinlian Liyan Heji significantly inhibited the increase of blood capillary permeability caused by acetic acid in the middle dose and the high dose groups.In the low dose and middle dose groups, Qinlian Liyan Heji obviously reduced the swelling of plantar in 2, 3, 4, 5 h.In the high dose group, Qinlian Liyan Heji markedly lowered the swelling of plantar in 1, 2, 3, 4, 5 h. Qinlian Liyan Heji significantly reduced the granuloma caused by cotton ball. On the other hand, Qinlian Liyan Heji exerted bacteriostatic effect on the above 7 types of bacteria. Conclusion Qinlian Liyan Heji has effects of anti-inflammation and bacteriostasis.

OBJECTIVETo prepare cinnamic acid derivatives-g-CTS and to study its antioxidation activity.

METHODThe ability of catching oxygen of the products and raw material were determined through two methods, Marklund method and trace pyrogallic acid method, with autoxidation reaction of pyrogallol as the oxygen anion source.

RESULTThe antioxidation activities of all products were better than the raw material.

CONCLUSIONCinnamic acid derivatives-g-CTS is suitable as the O2-* -capture agent.

Antioxidants ; chemical synthesis ; chemistry ; Caffeic Acids ; chemical synthesis ; chemistry ; Cinnamates ; chemical synthesis ; chemistry ; Coumaric Acids ; chemical synthesis ; chemistry ; Molecular Structure ; Spectroscopy, Fourier Transform Infrared

Objective To investigate the effect of ischemic preconditioning (IPC) on the expression of a disintegrin and metalloprotease with thrombospondin type 1 motifs (ADAMTS-1), and to study whether the application of small interfering (si)RNA specifically targeting ADAMTS-1 would help to recover IPC protection in the aged heart. Methods The 32 young (4 months) and 32 aged(24 months) male Sprague-Dawley (SD) rats were assigned randomly to IPC group (n=20) and sham operated group (n= 12) respectively. Myocardial samples from the ischemic-reperfused region were harvested for detecting the ADAMTS-1 expression. In addition, the 110 aged SD rats were assignedrandomly to ADAMTS-1 siRNA group and control group (n=55, each). The effects of ADAMTS-1siRNA transfcction on the expression of ADAMTS-1 protein, myocardial infarction survival rate,heart function and myocardial infarction size after IPC were observed.Results Twenty-four hours after IPC, the ADAMTS-1 protein expression increased significantly in iscbemic-reperfused region both in young and aged rats (P＜0. 05), and the protein expression was higher in aged rats than in young rats (P＜0.05). In young-IPC group, the absorbency showed ADAMTS-1 protein expression at 0 hrs and 24 hrs after IPC were 0. 05±0.01 and 0.12±0.03 by immunohistochemical staining, and were 0.68±0. 16 and 1. 17±0.21 by Western blots respectively. In aged-IPC group, the absorbency showed ADAMTS-1 protein expression at 0 hrs and 24 hrs after IPC were 0.07±0. 03 and 0.21 ±0.04 by immunohistochemical staining, and were 0. 76±0. 21 and 1. 48±0. 17 by Western blots. In the aged rats, ADAMTS-1 siRNA transfection inhibited ADAMTS-1 protein expression (0. 66±0. 19and 0.78±0.21, by Western blots at 0 hrs and 24 hrs after IPC, P＞0.05), but didn't improve myocardial infarction survival rates [ADAMTS-1 siRNA group and sham operated group: 14.3% (5/35) vs. 17.1 %(6/35), P＞0.05], left ventricular fractional shortening [(14.0±3.2)% vs. (13.0±2.9)%, P＞0.05] and myocardial infarction size[(39.0±4.1)% vs. (38.0±5.3)%, P＞0.05].Conclusions ADAMTS-1 expression induced by IPC increases significantly in aged versus in young rats. ADAMTS-1 knockdown by siRNA inhibits ADAMTS-1 protein expression but cannot recover the age-associated loss of IPC protection.

Background and purpose: Cancer stem cells (CSCs) isolated from human glioma are cancer-initiating cells and sources of tumor recurrence in brain tumors. The poor outcome of glioma is because cancer stem cells can not be eradicated. This article was aimed to explore the resistance of CSCs to chemotherapeutic agents and expression of drug-resistance enzymes in glioma cancer stem cells. Methods: Cancer stem cells from U251 were isolated by using magnetic sorting. The proliferation inhibitory effects of Vumon-26 (Vm-26), bischloronitrosourea (BCNU) and diamminedichloroplatinum (DDP) on U251-CSC and U251 were examined by drug sensitivity testing in vitro (MTT assay) and the apoptosis rates were observed by flow cytometry. Western blot was performed to examine the expression of three drug-resistance enzymes including LRP, MGMT and Topo Ⅱα. Results: Chemotherapeutic agents had a more obvious inhibitory effect on U251 than U251-CSC, as well as higher apoptosis rates. LRP, MGMT and Topo Ⅱα expression were significantly higher in U251-CSC as compared to U251, Conclusion: Glioma stem cells showed strong capability of tumor's resistance to chemotherapeutic agents including Vm-26, BCNU and DDP. This resistance is probably contributed by the CD133 positive cell with higher expression of on LRP, MGMT and Topo Ⅱα.

Objective:To investigate the effects of continuous monitoring intracranial pressure (ICP) and brain oxygen partial pressure (PbtO 2) on the prognosis of patients with severe craniocerebral injury. Methods:A prospective randomized controlled trial was conducted. Seventy patients with severe craniocerebral injury with a Glasgow coma score (GCS) 4-8 admitted to the neurosurgical intensive care unit (NICU) of the People's Hospital of Inner Mongolia Autonomous Region from January 2017 to May 2020 were enrolled, and they were divided into ICP monitoring group and ICP+PbtO 2 monitoring group by random number table. Patients in ICP monitoring group received ICP monitoring and were given traditional treatment of controlling ICP and cerebral perfusion pressure (CPP), the therapeutic target was ICP < 20 mmHg (1 mmHg = 0.133 kPa) and CPP > 60 mmHg. Patients in ICP+PbtO 2 monitoring group were given ICP and PbtO 2 monitoring at the same time, and oxygen flow was adjusted on the basis of controlling ICP and CPP to maintain the PbtO 2 > 20 mmHg, and the therapeutic target of ICP and CPP was the same as the ICP monitoring group. ICP and PbtO 2 values were recorded during monitoring in the two groups, the results of CPP, GCS and arterial blood gas analysis were recorded, and the prognosis at 3 months and 6 months after injury was compared by Glasgow outcome scale (GOS) score between the two groups. GOS score > 3 was considered as good prognosis. Kaplan-Meier survival curve was drawn, and the 3-month and 6-month cumulative survival rates of the two groups were analyzed. Linear regression analysis was used to further evaluate the relationship between PbtO 2 and GOS score. Results:Finally, a total of 70 patients with severe craniocerebral injury were enrolled in the analysis, 34 patients received ICP combined with PbtO 2 monitoring and guided therapy, and 36 patients received ICP monitoring alone. The average ICP of ICP+PbtO 2 monitoring group was significantly lower than that of ICP monitoring group (mmHg: 13.4±3.2 vs. 18.2±8.3, P < 0.01). Although the CPP in both groups was great than 60 mmHg, the average CPP of ICP+PbtO 2 monitoring group was significantly higher than that of ICP monitoring group (mmHg: 82.1±10.5 vs. 74.5±11.6, P < 0.01). No significant difference was found in average GCS score or arterial partial pressure of carbon dioxide (PaCO 2) between the ICP+PbtO 2 monitoring group and ICP monitoring group [GCS score: 5.3±2.3 vs. 5.2±2.2, PaCO 2 (mmHg): 33.5±4.8 vs. 32.6±5.2, both P > 0.05]. The average arterial partial pressure of oxygen (PaO 2) of ICP+PbtO 2 monitoring group was obviously higher than that of ICP monitoring group (mmHg: 228.4±93.6 vs. 167.3±81.2, P < 0.01). Compared with the ICP monitoring group, the good outcome rates of 3 months and 6 months after injury in the ICP+PbtO 2 monitoring group were significantly higher (3 months: 67.6% vs. 38.9%, 6 months: 70.6% vs. 41.7%, both P < 0.05). Kaplan-Meier survival curve showed that the 3-month and 6-month cumulative survival rates of ICP+PbtO 2 monitoring group were significantly higher than those of ICP monitoring group (3 months: 85.3% vs. 61.1%, Log-Rank test: χ2 = 5.171, P = 0.023; 6 months: 79.4% vs. 55.6%, Log-Rank test: χ2 = 4.511, P = 0.034). Linear regression analysis showed that PbtO 2 was significantly correlated with GOS score at 3 months and 6 months after injury in patients with severe craniocerebral injury ( r values were 0.951 and 0.933, both P < 0.01). Conclusions:PbtO 2 compared with ICP monitoring guiding therapy is valuable in improving the prognosis of patients with severe craniocerebral injury. It can improve the prognosis at 3-6 months after injury.