Objective To screen the potential biomarkers in plasma of rats with acute paraquat (PQ) poisoning using gas chromatography-mass spectrometry (GC-MS) based metabonomics technology,and to provide concrete evidence for early diagnosis.Methods Eight Sprague-Dawley (SD) rats were randomly divided into PQ poisoning group (intragastricly administrated with PQ solution 100 mg/kg) and control group (intragastricly administrated with the same volume of normal saline) according to the random number table,with 4 rats in each group.The general situation of rats was observed at 2,24 and 48 hours after administration.The blood of eye sockets was collected,the endogenous small molecule metabolites in plasma were determined with GC-MS method,and metabolic profile analysis and random forest analysis were performed to filter the potential biomarkers.Results ① The rats in PQ poisoning group gradually appeared lack movement,tachypnea,abdominal seizure and other symptoms of poisoning.In control group,the vital signs were stable.② The metabolites in plasma of rat were analyzed with GC-MS analysis,and the diagrammatic figure was plot as combined with principal component analysis (PCA) and partial least squares-discriminated analysis (PLS-DA) model,which showed that the distribution of plasma metabolism in PQ poisoning group was more diffuse but in the control group was more intensive,indicating that the metabolic patterns in two groups were different.From 2 hours after PQ administration,the metabolic trajectory in PQ poisoning group was significantly deflected compared with that of the control group,which was similar to control group until 48 hours,indicating that the metabolites in plasma of rat showed obvious difference in the early period.Five kinds of potential biomarkers with large weights were selected by random forest method which were serine,L-asparagine,hexadecanoic acid,octadecanoic acid,and arachidonic acid,the retention time was 15.259,24.345,33.334,37.695,and 40.254 minutes,respectively.The levels of serine,L-asparagine,arachidonic acid in PQ poisoning group were significantly higher than those of the control group,peaked at 48,48 and 24 hours,respectively (40.884-5.38 vs.28.85±2.32,6.61±1.31 vs.0.76±0.65,14.21±4.28 vs.4.42±1.19,all P ＜ 0.01),and the levels of hexadecanoic acid and octadecanoic acid were significantly lowered,reached tough at 48 hours (39.09 ± 10.23 vs.83.99 ± 20.49,44.03 ± 3.60 vs.140.76 ± 73.91,P ＜ 0.05 and P ＜ 0.01).The changes in these biomarkers were related to the toxicity of PQ,indicating that PQ could interfere the energy and lipid metabolism in rats.Conclusion Combine with the metabonomics analysis,screened plasma serine,L-asparagine,arachidonic acid content in PQ poisoning rats increased significantly,and hexadecanoic acid and octadecanoic acid content decreased significantly,which can preliminary diagnose acute PQ poisoning with animal general performance.

Objective To study the repair function of united endothelial progenitor cells (EPC)transplantation on injured liver endothelium by bone marrow transplantation (BMT) conditioning.Methods C57BL/6 mice were divided into four groups randomly: normal control group, without any treatment; irradiation alone group, administered a total body irradiation(TBI) pretreatment, without BMT; (3) BMT alone group: C57BL/6 mice were infused with bone marrow mononuclearcells (MNC) 5 × 106/only through caudal vein not more than 4 h after the same TBI pretreatment as the irradiation alone group; united transplantation group: receiving the same way as the BMT alone group, but C57BL/6 mice were infused with EPC 5 × 105/only at the same time. Two, 4, 7, 14, and 21 days after the TBI, the changes of the liver weight were observed regularly. The histopathological examination of liver was done at the 4th, 7th, 14th, and 21st day after the TBI. Results In irradiation alone group, BMT alone group and united transplantation group the liver weight began to increase significantly on the day 2 and peaked at 14th day after the TBI, and the peaks were respectively (1.65±0. 15) times (P＜0. 05), (1.61 ±0.06) times (P＜0.05), and (1.11 ±0.40)times (P＜0. 05) of those in normal control group. At the day 14, the liver weight in irradiation alone group, BMT alone group and united transplantation group began to decrease, and on the day 21 the liver weight in united transplantation group had been completely restored to normal level, however the liver weight in irradiation alone group and BMT alone group were still significantly heavier than that in normal control group (P＜0. 05). Liver histopathological examination revealed that there were obvious sinusoidal endothelial cells (SEC) injury, hepatocyte edema and severe inflammatory cell infiltration in irradiation alone group, and on the day 7 the hepatocyte edema and necrosis were significantly worse than before, and almost no alive SEC were found. On the day 14 the injury of SEC in BMT alone group was lighter than before, but on the day 21 the injury had not returned to normal. On the day 7 the injury of SEC, hepatocyte edema and necrosis were alleviated in united transplantation group as compared with irradiation alone group and BMT alone group, and on the day 14 the injury had returned to normal basically. Conclusion The transplantation conditioning could damage recipient liver endothelium and the injury would persist, and united EPC infusion could repair the injured SEC following BMT.

Objective To determine the conditioning regimen suitable for mice allogeneic hematopoietic stem cell transplantation (allo-HSCT).Methods Twelve BALB/c mice were randomly divided into 2 equal groups to undergo X-ray irradiation by linear accelerator at the dose of 7.0 Gy (pure X-ray group) or 60Co source irradiation at the dose of 7.0 Gy (pure γ-ray group).Thirty mice were randomly divided into 2 equal groups to undergo X-ray irradiation and then infusion of bone marrow from donor mice via caudal vein (X-ray + transplantation group) or γ-ray and then infusion of bone marrow via caudal vein (γ-ray + transplahtation group).3,5,7,10,15,20,and 30 d later peripheral blood samples were collected to calculate the number of white blood cells (WBCs) and detect the chimeric rates of lymphocytes by flow cytometry.5,10,and 20 d after irradiation 15 mice were killed with their lung,liver,small intestine,spleen,and femurs taken out to undergo pathological examination.Results The survival rates during the period 5-15 days of the γ-ray + transplantation group were all significantly higher than those of the X-ray + transplantation group.The pathological changes of organs of the X-ray +transplantation group were all more severe than those of the γ-ray + transplantation group.Since the fifth day after transplantation cells originating from the donor began to appear in the peripheral blood.The chimeric rate of the γ-ray + transplantation group 10 days after transplantation was (95.53± 2.57) %.The chimeric rates 5,10,and 20 days after transplantation of the γ-ray + transplantation group were all significantly higher than those of the X-ray + transplantation group (t = 15.263,3.256,P < 0.05).The WBC count of both irradiation groups decreased to the lowest level 5 d later and began to increase 10 days after transplantation and the WBC counts of the γ-ray + transplantation group 10 and 20 days aftertransplantation were both significantly higher than those of the X-ray + transplantation group (t = 3.624,6.695 ,P < 0.05).The chimeric rats of the peripheral lymphocytes 10 and 20 days after transplantation of the γ-ray + transplantation group were both significantly higher than those of the X-ray + transplantation group (t = 12.317,8.295,P < 0.05).The homogeneity rate of transplantation of the γ-ray +transplantation group was better than that of the X-ray + transplantation group.Conclusions As a conditioning regimen in allogeneic hematopoietic stem cell transplantation γ-ray irradiation causes milder injury and accelerated reconstitution of hematopoiesis and immunity,in comparison with X-ray irradiation.

Objective To study the relationship between graft-versus-host disease (GVHD) and endothelium injury following hematopoietic stem cells transplantation in mice. Methods C57BL/6 mice as donors and Balb/c mice as recipients were randomly divided into 4 groups: control group, bone marrow transplantation group, GVHD group, GVHD mitigation group. The clinical manifestations,circulating endothelial cells and tissue pathological changes were observed at different time points after transplantation. Results No manifestations of GVHD were found in each group at the day 5, while those were found in GVHD group at the day 9 and all died within 15 days. The counts of endothelial cells in peripheral blood showed no significant difference at the day 5 between GVHD group (7. 34 ±1.26 cells/μl) and bone marrow transplantation group (11.51 ± 7. 40 cells/μl) or GVHD mitigation group (7. 36 ± 0. 16 cells/μl), while among three groups there was statistically significant difference at the day 9 (GVHD group: 153. 64 ± 35. 35 cells/μl vs bone marrow transplantation group: 10. 49 ±5. 61 cells/μl and GVHD mitigation group: 47. 82 ± 4. 69 cells/μl). The scores of pathological aGVHD had no significant difference at the day 5 between GVHD group (4. 33± 1. 53) and bone marrow transplantation group (3. 33 ± 0. 58) or GVHD mitigation group (4. 00 ± 1.73), while among three groups there was statistically significant difference at the day 9 (GVHD group: 10. 0 vs bone marrow transplantation group: 3. 33 ± 1.15 or GVHD mitigation group: 4. 33 ± 0. 58) and at the day 14 (GVHD group: 10. 33 ± 2. 58 vs bone marrow transplantation group: 2. 33 ± 1.25 or GVHD mitigation group 3. 33 ± 1.15). Conclusion Occurrence of GVHD causes endothelial damage again and injured endothelium worsens the GVHD.

Objective To investigate the prevalence of the depression and the activities of daily living in the elderly population in Hebei province.Methods In this cross-sectional study,3 176 subjects aged over 60 were selected from 4 urban communities in Hebei Province.The demographic data was collected,and the Center for Epidemiological Survey,Depression Scale,(CES-D) and the activities of daily living Scale (ADL) were used to assess their depression status and activities of daily living.Results Among the 3 176 subjects,268 cases (8.4％) got the CES-D scores of over 15 and 232 cases (7.3％) got the ADL scores of over 26.14.2％ of depression group needed life care,27.9％ of depression group had absence of daily living activities.Multivariate logistic results showed that gender (OR=2.142),diseases situation (OR=2.214),marriage (OR=0.484),and life abilities like shower (OR =1.333),walk around home (OR=1.275),wear clothes(OR=2.129),moving on a wheelchair(OR=1.118) had significant effect on depression.Conclusion Elder people population who have characteristics like female,single,illness,can't take shower by themselves,life care depended,more likely get higher CES-D scores and depression.

Objective To investigate the expression of SP 100 protein in ATRA-treated NB4 cells and its effect on pro-liferation in NB4 cells.Methods Q-PCR was employed to measure the expression of SP 100 mRNA;Western blot was used to detect the expression of SP 100 protein; Immunofluorescence was adopted to determine the location of SP100;Cell viability was analyzed by CCK 8;Flow cytometry was used for cell cycle analysis .Results ATRA may induce the expression of mRNA and protein of SP 100.ATRA changes the location of SP100 from a micro-punctate pattern into a punctate nuclear pattern in NB 4 cells.SP100-shRNA promotes the proliferation of NB 4 cells and in-creased the cells in G2/M phase.Conclusions The expression of SP100 was significantly increased in ATRA-treated NB4 cells, and SP100 may be involved in the regulation of proliferation activity of NB 4 cells.

Objective To assess the functional role of TH 17 cells in allogeneic hematopoietic stem cell transplantation (allyHSCT).Methods Bone marrow monocytes and splenic T cells were enriched from C57/BL6 donors.Recipient Balb/c mice were irradiated with 7.5 Gy total body irradiation (TBI) and injected with 5 105 splenic T cells and 5 106 bone marrow monocytes.Survival was monitored daily,clinical graft-versus-host disease (GVHD) was assayed three times a week,and detailed histopathologic analyses of lung were performed at day six after Allo-HSCT.Flow cytometry analysis was performed using CD3-FITC,CD4-PE,CD45-PerCP-CyS.5 monoclonal antibodies.Cells were stained for intracellular cytokines using mouse TH 1/TH2/TH 17 cytokine kit.Results All the experimental animals showed GVHD manifestations on the day 6 after transplantation.Animals from BMT and HF groups were scarified and histological analysis of lung was performed.Absence of TH 17 cells induced severe pathologic pulmonary lesions.The histopathology of the lung tissue was characterized by disorganization,epithelia cell damage,interstitial fibroplasias,and monocytes infiltration.The proportion of TH1 and TH 17 in BMT group was (5.53 ± 0.11 ) ％ and ( 1.04 ± 0.34)％ respectively,both significantly different from that in HF group.The levels of IL-17A and IFN-γin BMT group were (2.81 ±0.19) and (42.97 ± 0.23) pg/mL respectively.IL-17A could not be detected in HF group,yet the level of IFN-y was only (9.89 ± 0.51 ) pg/mL.IL-10 in both HF and BMT groups was not detectable.Conclusion Lung is on target of aGVHD.IL-17A may play a key role in the lung injury after transplantation.

Objective To investigate the changes of short chain fatty acids (SCFA) induced by tacrolimus (FK506) in rats and evaluate its effect on blood glucose levels. Methods Ten SD rats were divided into the FK506 group and control group (n=5 in each group). In the FK506 group, the rats were received a subcutaneous injection of FK506 (3 mg/kg) +sunflower oil solution containing 10% ethanol daily for consecutive 4 weeks. In the control group, the rats were received a subcutaneous injection of an equivalent amount of sunflower oil solution containing 10% ethanol for consecutive 4 weeks. During the drug injection period, the body mass of rats was measured every week in two groups. After the drug injection period, blood glucose level, SCFA content in the blood and feces samples were measured in two groups. Results Compared with the control group, the relative body mass of rats in the FK506 group was significantly lower at the 2nd, 3rd and 4thweeks (all P<0.01). Compared with the control group, the blood glucose levels of rats in the FK506 group were significantly increased at 0, 30, and 60 min after giving glucose (P<0.01-0.05). Compared with the control group, the contents of acetic acid, propionic acid, isobutyric acid, butyric acid, isovaleric acid and valeric acid in the feces sample were significantly lower in the FK506 group (P<0.01-0.05). Conclusions FK506 can upregulate the blood glucose level in rats, which is probably induced by the decrease of SCFA content in rat feces.

Background: Antibiotic resistance is a significant public health concern around the globe.Antimicrobial peptides exhibit broad-spectrum and efficient antibacterial activity with an added advantage of low drug resistance. The higher water content and 3D network structure of the hydrogels are beneficial for maintaining antimicrobial peptide activity and help to prevent degradation. The antimicrobial peptide released from hydrogels also hasten the local wound healing by promoting epithelial tissue regeneration and granulation tissue formation. Objective: This study aimed at developing sodium alginate based hydrogel loaded with a novel antimicrobial peptide Chol-37(F34-R) and to investigate the characteristics in vitro and in vivo as an alternative antibacterial wound dressing to treat infectious wounds. Methods: Hydrogels were developed and optimized by varying the concentrations of crosslinkers and subjected to various characterization tests like cross-sectional morphology, swelling index, percent water contents, water retention ratio, drug release and antibacterial activity in vitro, and Pseudomonas aeruginosa infected wound mice model in vivo. Results: The results indicated that the hydrogel C proved superior in terms of cross-sectional morphology having uniformly sized interconnected pores, a good swelling index, with the capacity to retain a higher quantity of water. Furthermore, the optimized hydrogel has been found to exert a significant antimicrobial activity against bacteria and was also found to prevent bacterial infiltration into the wound site due to forming an impermeable barrier between the wound bed and external environment. The optimized hydrogel was found to significantly hasten skin regeneration in animal models when compared to other treatments in addition to strong inhibitory effect on the release of pro-inflammatory cytokines (interleukin-1β and tumor necrosis factor-α). Conclusions Our results suggest that sodium alginate -based hydrogels loaded with Chol-37(F34-R) hold the potential to be used as an alternative to conventional antibiotics in treating infectious skin wounds.

Objective:To investigate the effectiveness of scanning glucose monitoring system in dawn phenomenon of patients with type 2 diabetes mellitus (T2DM) based on continuous glucose monitoring system (CGMS) .Methods:A total of 45 patients with T2DM hospitalized in the Endocrine Department of Xinxiang Central Hospital from June 2019 to June 2020 were selected as the research subjects by convenience sampling method. All selected patients were asked to wear the scanning glucose monitoring system after admission, and then the CGMS for continuous glucose monitoring after 48 hours. The scanning glucose monitoring system and the CGMS were taken off at the same time after 72 hours. The blood glucose analysis report of the same period was checked to determine whether the dawn phenomenon occurred. The consistency to determine dawn phenomenon was analyzed between CGMS and scanning blood glucose monitoring by Kappa test. According to the CGMS judgment results, the receiver operating characteristic curve (ROC) of the scanning blood glucose monitoring system was drawn to evaluate the optimal tangent value of the night blood glucose for predicting dawn phenomenon and the next day fasting blood glucose for evaluating dawn phenomenon.Results:Among the 45 study subjects, there was no statistical difference in determining the incidence of dawn phenomena between CGMS and scanning glucose monitoring system [55.56% (25/45) vs. 46.67% (21/45) , χ 2=0.711, P>0.05]. Consistency analysis showed that Kappa value was 0.895, and the consistency of CGMS and scanning glucose monitoring system in judging dawn phenomenon was good (Kappa=0.895, 95% CI 1.130-4.883, P<0.01) . The optimal tangent value of night blood glucose for predicting dawn phenomenon was 8.31 mmol/L, and the optimal tangent value of the next day fasting blood glucose for evaluating dawn phenomenon was 7.25 mmol/L. The value of the area under the ROC curve were 0.729 and 0.803 respectively. Conclusions:Scanning blood glucose monitoring can accurately judge the dawn phenomenon. When the night blood glucose value is 8.31 mmol/L, it indicates that the dawn phenomenon may occur. When the next day's fasting blood glucose value is 7.25 mmol/L, it indicates that the dawn phenomenon may already occur.