Molecularly imprinted polymer (MIP) was synthesized by precipitation polymerization using ribavirin as the template molecule and methacrylic acid as the functional monomer.The sensitive film of ribavirin electrode was constructed by molecularly imprinted polymer doped with graphene oxide as the ionophore, poly(vinylchloride) (PVC) as matrix and dioctyl sebacate for plasticizer.The results showed that the best performance of the electrode was obtained when the sensitive film compositions were 100.8 mg of MIP, 14.7 mg of GO, 450.8 mg of PVC and 901.6 mg of dioctyl sebacate, and the inner filling solution composition was 0.1 mol/L NaCl + 0.05 mol/L NaAc-0.05 mol/L HAc + 1.0×10.-5 mol/L ribavirin solution.The electrode showed a near-Nernstian slope of 45.565 mV/decade for ribavirin over the range of 1.0×10.6-1.0×10.-4 mol/L and a detection limit of 1.0×10.-7 mol/L.The electrode could be used in the pH range of 3 to 5 with response time of less than 3 min.The developed electrode exhibited high selectivity for ribavirin and was successfully applied to the determination of ribavirin in feed and injection with recoveries of 90%-110% and RSD of 3.0%-7.9%.

Aim Tostudytheinfluencesofsulfated polysaccharides ( SPPM60-D) on the regulation of free calcium concentration ( [ Ca2+] i ) of T lymphocytes of mice in vitro and explore the mechanisms involved. Methods Polysaccharides(PPM60)wereextracted from masson pine pollen with hot water and 60% etha-nol. PPM60-D was separated and purified from PPM60 with Sephacryl S-400HR. Sulfated polysaccharides ( SPPM60-D ) were derivated by chlorosulfonic acid-pyridine method and the [ Ca2+] i of T lymphocytes were measured by fluorescence spectrophotometer. IL-2 and IL-4 were measured by ELISA kits. Results ConAandSPPM60-Dcouldincrease[Ca2+]iinT lymphocytes by 211. 5% and 201. 8% respectively ( P<0. 01). 2-APB, LY294002, U73122 and verapamil rather than TAK-242 could significantly inhibit the in-crease of [ Ca2+] i induced by SPPM60-D. SPPM60-D could significantly increase the level of IL-2 and IL-4 in supernatant ( P <0. 01 ) . 2-APB rather than TAK-242 could significantly inhibit the increase of cyto-kines.Conclusion ItisspeculatedthatSPPM60-D could increase [ Ca2+ ] i via TCR/CD3-PI3K-PLC-IP3 R-Ca2+ signal pathway through TCD/CD3 receptor in T lymphocytes so that it could improve the level of IL-2 and IL-4 in supernatant in T lymphocytes.

ObjectiveTo evaluate the feasibility and clinical significance of emergency bedside ultrasound-guided central venous catheterization performed by emergency department doctors.Methods The clinical data of 216 patients, who underwent central venous catheterization in the Department of Emergency of Shengjing Hospital of China Medical University from January 2009 to June 2014 were retrospectively analyzed. All the patients received femoral vein puncture or internal jugular vein catheterization. The patients were divided into three groups according to the method of catheterization: 72 patients received emergency ultrasound-guided central venous catheterization by emergency doctors independently were assigned as A group, 72 patients underwent catheterization by emergency doctors after being demarcated by ultrasound doctors served as B group, and 72 patients who underwent catheterization method guided by traditional landmark served as C group. Success rate, time spent for catheterization, number of attempts for intubation, and incidence of complications were compared among three groups.Results As compared with that of groups B and C, a higher success rate [98.61% (71/72) vs. 83.33% (60/72), 73.61% (53/72), bothP< 0.01] was found in group A, also with a shorter successful time for insertion of the catheter (minutes: 5.5±2.5 vs. 9.6±3.7, 16.6±7.2, bothP< 0.05), less frequency of the catheter insertion (times: 1.0±0.0 vs. 1.8±0.7, 2.7±2.6, bothP<0.05), and lower incidence of changing puncture site due to insert failure [1.4% (1/72) vs. 8.3% (6/72), 20.8% (15/72), bothP< 0.05], lower incidence of mechanical and infective complication [15.3% (11/72) vs. 41.7% (30/72), 59.7%(43/72), bothP< 0.05], and also lower catheterization related infection risk [13.9% (10/72) vs. 15.3% (11/72), 12.5%(9/72), bothP> 0.05].Conclusion Emergency bedside ultrasound-guided catheterization resulted in higher success rate and less related complication, therefore it can be recommended for widely application in emergency department treatment.

BACKGROUND:Current researches on whether the intramuscular injection of heterogeneous umbilical cord mesenchymal stem cells (UC-MSCs) is safe or not lack theoretical basis. OBJECTIVE:To explore the effects of intramuscular injection of heterogeneous UC-MSCs on expression of myocardial vascular endothelial growth factor (VEGF), cardiac troponin I (cTnI) and serum VEGF, hepatocyte growth factor (HGF), insulin-like growth factor 1 (IGF-1) and granulocyte macrophage colony stimulating factor (GM-CSF) in normal Wistar rats. METHODS:A total of 60 Wistar rats were divided into six groups randomly. Rats in the six groups were respectively administrated with intramuscular injection of PBS, Dulbecco’s modified Eagle’s medium, hUC-MSC supernatant, 0.25×105, 1.0×105, 4.0×105 hUC-MSCs. Rats received a second intramuscular injection 4 weeks after first injection. Eight weeks later, the blood sample and myocardial tissue were taken. The serum concentration of VEGF, HGF, IGF-1 and GM-CSF were measured with enzyme-linked immunosorbent assay kit. The myocardial VEGF and cTnI expression were detected by immunohistochemical technique. RESULTS AND CONCLUSION:There was no significant difference in the serum concentration of the VEGF, HGF, IGF-1 and GM-CSF among the groups before and after injection (P>0.05). In the same group, no statistical significant changes in the serum concentration of the VEGF, HGF, IGF-1 and GM-CSF were found among the rats before and after injection (P>0.05). Eight weeks after injection, weak positive expression of the VEGF in the cytoplasm of cardiocytes in the six groups was observed, and strong positive expression of the cTnI in the cytoplasm of cardiocytes in the six groups was observed. There was no significant difference in the VEGF and cTnI content in the myocardium among the groups (P>0.05). Intramuscular injection of hUC-MSCs or the supernatant of hUC-MSCs had no effects on the serum concentration of the VEGF, HGF, IGF-1, GM-CSF and the myocardial VEGF and cTnI expression in normal Wistar rats.

Objective To analyze the therapeutic effect ofShengji-Yuhong ointment in the treatment of patients with pressure ulcer.Methods 86 patients of pressure ulcer were randomly divided into a control group and an observation group, with 43 cases in each. After debridement, the wound was covered with vaseline gauze in the control group, whileShengji-Yuhong ointment in the treatment group. 10 days constituted 1 course of treatment, and both groups were treated for 3 courses. The blood supply of the whole blood viscosity, plasma viscosity, erythrocyte aggregation index detection; white blood cell count (WBC), erythrocyte sedimentation rate (ESR), and C reactive protein (CRP) were observed in order to observe the control condition of the patients with wound infection.Results The total effective rate was 95.3% (41/43) and 74.4% (32/43) in the observation group and control group respectively, with significant difference between two groups (χ2=5.800,P=0.016). After treatment, the whole blood viscosity (high-shea) (4.06 ± 1.38 mPa?svs. 4.74 ± 1.62 mPa?s,t=2.095), the whole blood viscosity (medium-shea) (3.71 ± 1.22 mPa?svs. 4.34 ± 1.41 mPa?s,t =2.216), blood reduction viscosity (1.13 ± 0.22 mPa?svs.1.44 ± 0.51 mPa?s,t=3.660), the whole blood viscosity (medium-shea) (4.16 ± 0.48 mPa?svs. 4.51 ± 0.89 mPa?s,t=2.270) obviously compared with group before treatment decreased (P<0.05). The patients in the observation group in the whole blood viscosity (medium-shea) (3.71 ± 1.22 mPa?svs. 4.16 ± 0.48 mPa?s,t=2.251), and blood reduction viscosity (1.13 ± 0.22 mPa?svs. 1.32 + 0.31 mPa?s,t=3.278) in the observation group were  obvious better than the control group (P<0.05). After the treatment the WBC, CRP, ESR in the observation group were decreased significantly than the control group (t=5.947, 7.198, 12.064,P<0.01).ConclusionShengji-Yuhong ointment can effectively control the PU infection in the wound, improve wound tissue under the blood circulation, and promote wound healing.

Objective: To explore the dose-response relationship between pre-pregnancy body mass index (BMI) and gestational diabetes mellitus (GDM), so as to provide insights into the cut-off values of pre-pregnancy BMI and optimizing GDM prevention and control strategies. Methods: Pregnant women that admitted to Zhengzhou Central hospital in 2021 were recruited, and demographics, family history, pregnancy and delivery history and blood glucose levels during pregnancy were collected. The dose-response relationship between pre-pregnancy BMI and GDM was analyzed using restricted cubic spline (RCS) analysis. The predictive ability of pre-pregnancy BMI for GDM risk was evaluated using receiver operating characteristic (ROC) curve. Results: A total of 2 279 participants were included in the study. The median age was 29.0 (interquartile range, 5.0) years. The median pre-pregnancy BMI was 21.1 (interquartile range, 3.8) kg/m2. There were 312 underweight women (13.69%), 825 women with low-normal weight (36.20%), 730 women with high-normal weight (32.03%), 345 overweight women (15.14%) and 67 obese women (2.94%).The prevalence of GDM was 17.20%. RCS analysis suggested a linear dose-response relationship between age, pre-pregnancy BMI and GDM (P<0.05). When pre-pregnancy BMI was higher than 21.1 kg/m2, the risk of GDM increased with pre-pregnancy BMI (P<0.05). When women aged over 29.0 years, the risk of GDM increased with age, and the dose-response relationship of GDM caused by pre-pregnancy BMI was stronger in the women aged over 29.0 years than in the women aged 29.0 years and below (P<0.05). The area under curve (AUC) was 0.654 (95%CI: 0.624-0.684). If the cut-off value of pre-pregnancy BMI was 23.0 kg/m2, the Youden index, sensitivity and specificity was 0.238, 0.472 and 0.766, respectively. If it was 24.0 kg/m2, the Youden index, sensitivity and specificity was 0.195, 0.342 and 0.853, respectively. If it was 21.1 kg/m2, the Youden index, sensitivity and specificity was 0.213, 0.676 and 0.537, respectively. Conclusions There is a linear dose-response relationship between pre-pregnancy BMI and GDM, and higher than 21.1 kg/m2 of the pre-pregnancy BMI could increase the risk of GDM.

Objective To explore the protective effect and mechanism of astaxanthin (AST) on the acute kidney injury induced by iohexol in rats.Method Thirty rats were randomly divided into five groups:control group (Ctrl);iohexol group (CM);astaxanthin group (AST,100 mg/kg),low astaxanthin dose group (LAST+CM,50 mg/kg) and high astaxanthin dose group (HAST+CM,100 mg/kg),6 in each group.The rats in AST,LAST+CM,HAST+CM groups were administrated with AST by oral gavages using an intubation needle for 10 consecutive days.The rats in Ctrl and CM groups rats in Ctrl,CM groups were given with dissolvant instead in equal volume.Except for the Ctrl and AST groups,on day 8,rats were given indomethacin,L-NAME and iohexol in their femoral vein under chloral hydrate anesthesia to build a contrast induced-nephropathy (CIN) model.At the end of the experiment (72 h after CIN induction),all rats were sacrificed.The Scr level,BUN level,renal histology,renal tissue activities in superoxide dismutase (SOD),catalase (CAT),glutathione peroxidase (GPx),Glutathione (GSH) and level of malondialdehyde (MDA) were performed.Apoptosis of renal cells was detected by Bcl-2,Bax and Caspase-3 p17 with Western blot.Results Compared with Ctrl group,the levels of Scr,BUN were significantly increased in CM group (all P ＜ 0.01);while compared with CM group,the indicators were decreased in treatment groups (P ＜ 0.01).Renal tubular structure damage,medulla congestion,loss of brush border,vacuolar degeneration,apoptosis and proteinaceous casts were observed in the CM group,and the renal injury scores were higher compared with Ctrl group (P ＜ 0.05),however,administrated with AST could significantly improve the changes (P ＜ 0.05).Oxidative stress indicators showed that MDA level were increased while SOD,GPx,GSH activities were significantly decreased at CM group (all P ＜ 0.05),and the indicators above were ameliorated in treatment groups (all P ＜ 0.05).Western blot showed that the expression of Bcl-2 was down-regulated while the Bax,Caspase 3 p17 was up-regulated respectively at CM group (P ＜ 0.05),while the HAST+CM group could prevent the changes.Conclusions Iohexol can results in oxidative stress increased in kidney,which activate Caspase-3 p17 signal path,down-regulated Bcl-2 expression,up-regulated Bax expression respectively,and lead to cell apoptosis.AST can ameliorate the changes,especially with high AST dose,which suggest that the possible protection mechanism is by ameliorating oxidative stress and inhibiting apoptosis pathways.

ObjectiveTo evaluate the surgical outcomes and prognosis of patients after liver resection for noncolorectal liver metastases.Methods72 patients with liver metastases who underwent liver resection at Tianjin Medical University Cancer Hospital were retrospectively studied.There were 32 males and 42 females,aged between 35～78 years.After liver resection,68 patients had a R0 resection (negative histological margin),and 4 patients had a R1 resection (positive histological margin).The primary tumours were breast,(n =16,22.2 ％),lung (n =14,19.4 ％),gastrointestinal (n=12,16.7％),gynecological (n =8,11.1％),pancreatobiliary (n =8,11.1％),melanoma (n=4,5.6％),sarcoma (n=4,5.6％),and genitourinary (n=2,2.8％).The mean diameter of the main tumour was 4.8 cm (range,1.5- 11.0 cm).The mean number of liver metastases was 1.2 (range,1-5).Liver metastases were synchronous in 6 patients (8.3％) and metachronous in the remaining 66 patients (91.7％).ResultsThe operative mortality was 0％.The mean hospital stay was 14.4 days (range 6-67 days).The median overall survival was 31 months (range,6-127 months).The 1-,3- and 5-year survival rates were 81.9％,37.5％ and 23.6％,respectively.Univariate analysis revealed primary tumour sites (breast vs.others),histological type (adenocarcinoma vs.others),postoperative chemotherapy,number of liver metastases (solitary vs.multiple) and time to liver metastases from diagnosis of primary tumours (≤ 12 months vs.＞ 12 months) were associated with overall survival (all,P＜0.05).In multivariate analysis,factors independently associated with poor survival were nonbreast origin (P =0.012),time to liver metastases from diagnosis of primary tumours ＜12 months (P=0.027) and multiple liver metastases (P=0.008).ConclusionsIn selected patients,liver resection is an effective and safe treatment for noncolorectal liver metastases.The time to liver metastases from diagnosis of primary tumours was independently associated with overall survival.For solitary or liver metastasis of breast origin,surgical resection significantly improved survival.

Objective To assess the therapeutic effects of activated charcoal on the acute dichlorvos poisoning in rats. Method Thirty male clean grade Wistar rats were randomly (random number) divided into three groups: control group (group A, n = 10), single dose activated charcoal group (group B, n = 10) and multi-dose activated charcoal (group C, n=10). The rats of group A were suffered from 35 mg/kg dichlorvos exposure by oral without activated charcoal and senna. The rats of group B received 35 mg/kg dichlorvos exposure by oral with 175 mg/kg activated charcoal given immediately after dichlorvos exposure and 35 mg/kg senna given half an hour later. In the group C, 35 mg/kg dichlorvos was given to rats by oral with 175 mg/kg activated charcoal given immediately after dichlorvos exposure and 35 mg/kg senna given half an hour later and then every four hours. Blood samples were collected from the carotid artery at different intervals after exposure. DDVP concentration and total blood acetyl-cholinesterase activity were detected. Differences in serum DDVP concentration, Cmax, AUC (0→∞ ), MRT and acetylcholinesterase among three groups were calculated by using ANOVA. Results Serum DDVP levels in single dose group and in multi-dose group were significantly different from those in control group (P < 0.05). The DDVP levels in multi-dose group were significantly different from those in single dose group 4 hours after exposure (P < 0.05). The AUC and Cmax in activated charcoal treatment groups were significantly different from those in control group (P < 0.05). There were no significant differences in MRT among three groups. Fours hours after exposure to dichlorvos,the levels of serum acetylcholinesterase in rats of group B and group C were significantly different from that in rats of group A (P < 0.05), and there was no significant difference in acetylcholinesteras between group B and group C (P > 0.05). Another four hours later, no differences in acetylcholinesterase were found a-mong three groups (P > 0.05). Conclusions The peak concentrations of dichlorvos in blood are lower in group B and group C, and the blood acetylcholinesterase inhibition is quelled by activated charcoal. Therefore, the effects of multi - dose of activated charcoal is better than that of single dose of activated charcoal.

It is a thorny problem of modern medicine that the in-stent restenosis (ISR) after percutaneous coronary intervention (PCI). Combining with the etiology and pathogenesis of TCM, Professor LIU Zhong-yong believes that the root cause of ISR after PCI is the deficiency syndrome: menstruation gradually dying up, the heart yang qi deficiency; and the direct cause is excess syndrome: endogenous turbidity syndrome, heart vessel blockage. The cause for the formation of turbidity syndrome is cold, phlegm, blood stasis, poison, and dampness. Depending on the clinical manifestations, five kinds of syndromes were divided: cold turbidity stagnation, phlegm turbidity resistance, blood stasis blockage veins, poison turbidity, and dampness turbidity resistance. Professor LIU Zhong-yong also proposed relevant treatment for both symptoms and root causes, which provided new ideas and experience in the integrated TCM and Western medicine for ISR after PCI.