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Objective:To investigate the arousal mechanism after sevoflurane anesthesia using orexinergic modulation in dorsal raphe nucleus(DRN) by optogenetic and chemogenetic techniques in rats.Methods:Forty-five healthy male Hcrt-Cre rats, aged 10-12 weeks, weighing 220-250 g, were divided into 6 groups by the random number table method: optical-excitatory group (CHR2 group, n=5), optical-inhibitory group (eNpHR group, n=5), optical-control group (O-CON group, n=5); chemogenetic-excitatory group (hm3Dq group, n=10), chemogenetic-inhibitory group (hm4Di group, n=10) and chemogenetic-control group (C-CON group, n=10). The optogenetic or chemogenetic techniques were used in each group. Three weeks after injecting the rat virus, anesthesia was induced and maintained with 2.7% sevoflurane anesthesia in 1.5 L/min O 2, and the EEG data were continuously recorded throughout the process. The burst suppression ratio (%BSR) was recorded at 2 min before and of laser stimulation. Combining optogenetic and chemogenetic strategies, it was investigated that whether activation of orexinergic projection to DRN could modulate anesthetic behaviors during sevoflurane anesthesia. Results:Compared with C-CON group, the recovery of righting reflex (RORR) time was significantly shortened after sevoflurane anesthesia in hm3Dq group ( P<0.05), and the RORR time was significantly prolonged after sevoflurane anesthesia in hm4Di group and eNpHR group ( P<0.05). Compared with O-CON group or the baseline at 2 min before light stimulation, the %BSR was significantly decreased during 473nm laser stimulation in CHR2 group ( P<0.05), and no statistically significant change was found in the %BSR during 473nm laser stimulation in eNpHR group ( P>0.05). Compared with O-CON group, the RORR time was significantly shortened after sevoflurane anesthesia in CHR2 group ( P<0.05). Conclusions:Lateral hypothalamic area orexin-DRN neural circuit plays a key role in promoting arousal from general anesthesia in rats.
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Objective:To produce 161Tb from enriched 160Gd 2O 3 isotope-enriched target material and realize domestic production of the novel medical isotope 161Tb. Methods:The 160Gd 2O 3 isotope-enriched target material was irradiated with neutrons by the China Mianyang Research Reactor (CMRR). The no-carrier-added 161Tb product was obtained after the processes of target broken, sample dissolution, separation and purification with lanthanide (LN) resin and solution replacement with diglycolamide (DGA) column. Various key indicators such as γ spectral purity, metal impurity content, specific activity, radiochemical purity, and radioactive concentration were used to conduct the quality inspection and the control of 161Tb products. Results:161TbCl 3 of 33.4 GBq was obtained in a single time with the radioactive concentration of 16.8 GBq/ml, nuclear purity more than 99.9%, and radiochemical purity of 99.2%. Metal impurity content was met the established standards, with the specific activity of 6.02×10 17 Bq/mol. The radiochemical purities of 161Tb labeling with 1, 4, 7, 10-tetraazacyclododecane-1, 4, 7, 10-tetraacetic acid- D-Phe1-Tyr3-Thr8-octreotide (DOTATATE) after 0 and 72 h were 100% and 95.8% respectively. Conclusion:The preparation of no-carrier-added 161Tb by using LN resin has the advantages of high separation performance and high sample loading, which has great significance in the field of medical isotope preparation and lays a good nuclide guarantee for the research and development of domestic 161Tb-labeled drugs.
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Objective:To investigate the role of stress-inducible protein Sestrin2 (Sesn2) in the improvement of insulin resistance in rat L6 skeletal muscle cells treated with liraglutide.Methods:The establishment of insulin resistance model of rat L6 skeletal muscle cells was induced by palmitate. The experimental cells were divided into control group(Con group), palmitate 0.6 mmol/L treatment group(PA group), palmitate 0.6 mmol/L+ liraglutide 10 nmol/L treatment group(PA+ Lir10 group), palmitate 0.6 mmol/L+ liraglutide 100 nmol/L treatment group(PA+ Lir100 group), and palmitate 0.6 mmol/L+ liraglutide 1 000 nmol/L treatment group(PA+ Lir1000 group). The cell counting kit 8(CCK8) method was used to detect the cell activity in each group. Western blotting was used to detect the expression levels of glucose transporter 4(GLUT4), protein kinase B(Akt), phosphorylated protein kinase B(p-Akt), and Sesn2 protein in L6 cells. L6 cells were transfected with siRNA to inhibit the expression of Sesn2. The cells were treated with palmitate and liraglutide. Western blotting was used to detect the expression levels of Sesn2, Akt, p-Akt, and GLUT4 protein in L6 cells.Results:Compared with Con group, the cell survival rate, p-Akt/Akt ratio, Sesn2, and GLUT4 protein expression in PA group decreased significantly( P<0.05). After liraglutide intervention, the cell activity, p-Akt/Akt ratio, Sesn2, and GLUT4 protein expression of PA+ Lir100 and PA+ Lir1000 groups was increased( P<0.05). After inhibiting the expression of Sesn2, p-Akt/Akt ratio and GLUT4 protein in transfected si-Sesn2 and treated with 0.6 mmol/L palmitate group(PA+ si-Sesn2 group) and transfected si-Sesn2 and treated with 0.6 mmol/L palmitate+ liraglutide 100 nmol/L group (Lir100+ PA+ si-Sesn2 group) were significantly lower than those in transfection negative group (si-Con group; P<0.05). Even after liraglutide intervention, compared with PA+ si-Sesn2 group, p-Akt/Akt ratio and GLUT4 protein expression level were not significantly increased in Lir100+ PA+ si-Sesn2 group ( P>0.05). Conclusions:Palmitate could induce the decrease of p-Akt/Akt ratio and GLUT4 protein expression in L6 cells. Liraglutide upregulates the expression of Sesn2, which leads to the increase of p-Akt/Akt ratio and GLUT4 protein expression and contributes to the improvement of insulin resistance.
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The development of immune checkpoint inhibitors (ICIs) has significantly improved the prognosis of cancer patients, but a large population of patients are still ineffective to ICIs treatment or develop aquired drug resistance. In order to improve the clinical benefits, a number of studies on ICIs based combination therapy have been actively explored, and have achieved satisfactory results. With the application of ICIs based combination therapy in clinical practice, increasing attention has been paid to the safety of combination therapy and the management of treatment-related adverse events. In this review, the characteristics of adverse events related to ICIs based combination therapies, especially programmed cell death protein 1/protein ligand 1 (PD-1/PD-L1) inhibitors are discussed, in order to provide profound thoughts for toxicity evaluation and individualized treatment decision in future clinical practice. .
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Objective@#To compare the efficacy of femoral triangle versus adductor canal approach to saphenous nerve block for postoperative analgesia in the patients undergoing knee arthroplasty.@*Methods@#Sixty American Society of Anesthesiologists physical status Ⅰ or Ⅱ patients of both sexes, aged 53-68 yr, scheduled for elective total knee arthroplasty under general anesthesia, were assigned into 2 groups (n=30 each) using a random number table method: femoral triangle approach to saphenous nerve block group (group F) and adductor canal approach to saphenous nerve block group (group A). Femoral triangle and adductor canal approach to saphenous nerve block was performed by injecting 0.5% ropivacaine 20 ml in group F and group A, respectively.Patient-controlled saphenous nerve block analgesia was used in two groups, and the analgesic pump solution contained 1% ropivacaine 400 mg diluted to 160 ml in 0.9% sodium chloride injection.The analgesic pump was set up with a 5 ml bolus dose, a 30-min lockout interval and background infusion at a rate of 5 ml/h, and analgesia lasted until 72 h after operation.When visual analog scale score > 4 and pain was not relived after 30-min pressing by patients, pethidine hydrochloride 100 mg was intramuscularly injected as rescue analgesic.The muscle strength of quadriceps femoris was assessed by manual muscle test at 4, 8, 24, 48 and 72 h after operation.The patient′s satisfaction score was assessed and recorded at 72 h after operation.Rescue analgesia and development of adverse reactions (local anesthetic intoxication, itching, dizziness, urinary retention, nausea and vomiting) were recorded within 72 h after operation.@*Results@#Compared with group F, the muscle strength of quadriceps femoris was significantly increased at 4, 8 and 24 h after operation, the rate of postoperative rescue analgesia was decreased (P<0.05), and no significant change was found in patient′s satisfaction score or incidence of adverse reactions in group A (P>0.05).@*Conclusion@#Adductor canal approach to saphenous nerve block provides better efficacy for postoperative analgesia than femoral triangle approach to saphenous nerve block in the patients undergoing knee arthroplasty.
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Objective@#To investigate the relationship between the magnesium intake and patterns of diary and the risk of type 2 diabetes in Harbin residents.@*Methods@#On April 2010, 24 communities in 7 districts of Harbin were selected as research sites using multi-stage stratified random cluster sampling method. A total of 9 734 residents aged 20-74 years was investigated using general questionnaire survey, dietary survey and biochemical indicators test. A total of 9 376 subjects were included in the study. Factor analysis was used to analyze dietary patterns. According to the quartile of dietary magnesium intake, the subjects were divided into four groups, from Q1 to Q4 group. The multivariate logistic regression model was used to analyze the relationship between dietary magnesium intake and the risk of type 2 diabetes within different dietary patterns.@*Results@#A total of 998 subjects with type 2 diabetes were screened. The median age of the diabetic group and the non-diabetic group were 54.8 and 50.8, respectively, and the males accounted for 43.4% (2 896 cases) and 34.6% (433 cases), respectively. The magnesium intake median (P25, P75) of two groups was 336.36 (257.31, 440.65) and 339.50 (264.51, 443.78) mg/d. Four dietary patterns were identified as western dietary mode, savvy dietary mode, traditional dietary mode, and staple food mode. In the western dietary model, the Q4 group had a higher risk of type 2 diabetes than Q1 group, with an OR (95%CI) value of 1.56 (1.06 to 2.32). However, in the savvy diet mode, compared with the Q1 group, the risk of diabetes in the Q4 group was lower, and the OR (95%CI) value was 0.61 (0.37 to 0.96). There was no statistically significant association between dietary magnesium intake and the risk of type 2 diabetes without considering dietary patterns (P>0.05).@*Conclusion@#Dietary magnesium intake has a different relationship with the risk of type 2 diabetes within different dietary patterns.
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Pancreatic cancer is a highly malignant tumor of the digestive system, also known as "the king of cancer" . Its incidence is increasing year by year worldwide. At present, there is still a lack of effective screening methods for pancreatic cancer, and the early symptoms are not obvious. Most pancreatic cancer is diagnosed in the late stage, and the best time for surgery has been lost, and patients often have poor response to radiotherapy, chemotherapy and targeted therapy, so the prognosis is very poor. The occurrence and development of pancreatic cancer are closely related to genetic background, environmental factors, basic diseases and living habits. So far, although certain risk factors have been identified, such as smoking, obesity, alcohol, chronic pancreatitis, type 2 diabetes mellitus, and family history, the cause of pancreatic cancer is still not very clear. In recent years, more and more studies have shown that in addition to the already recognized risk factors for pancreatic cancer, there is a certain relationship between digestive microecological disorders and the progression of pancreatic cancer. The authors review the research status of digestive system microecology and pancreatic cancer, in order to understand the role of digestive system microecology disorders in the occurrence and development of pancreatic cancer, thus providing a new way to effectively improve the prognosis of pancreatic cancer.
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Pancreatic cancer is a highly malignant tumor of the digestive system,also known as "the king of cancer".Its incidence is increasing year by year worldwide.At present,there is still a lack of effective screening methods for pancreatic cancer,and the early symptoms are not obvious.Most pancreatic cancer is diagnosed in the late stage,and the best time for surgery has been lost,and patients often have poor response to radiotherapy,chemotherapy and targeted therapy,so the prognosis is very poor.The occurrence and development of pancreatic cancer are closely related to genetic background,environmental factors,basic diseases and living habits.So far,although certain risk factors have been identified,such as smoking,obesity,alcohol,chronic pancreatitis,type 2 diabetes mellitus,and family history,the cause of pancreatic cancer is still not very clear.In recent years,more and more studies have shown that in addition to the already recognized risk factors for pancreatic cancer,there is a certain relationship between digestive microecological disorders and the progression of pancreatic cancer.The authors review the research status of digestive system microecology and pancreatic cancer,in order to understand the role of digestive system microecology disorders in the occurrence and development of pancreatic cancer,thus providing a new way to effectively improve the prognosis of pancreatic cancer.
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Objective To compare the efficacy of femoral triangle versus adductor canal approach to saphenous nerve block for postoperative analgesia in the patients undergoing knee arthroplasty.Methods Sixty American Society of Anesthesiologists physical status Ⅰ or Ⅱ patients of both sexes,aged 53-68yr,scheduled for elective total knee arthroplasty under general anesthesia,were assigned into 2 groups (n=30 each) using a random number table method:femoral triangle approach to saphenous nerve block group (group F) and adductor canal approach to saphenous nerve block group (group A).Femoral triangle and adductor canal approach to saphenous nerve block was performed by injecting 0.5％ ropivacaine 20 ml in group F and group A,respectively.Patient-controlled saphenous nerve block analgesia was used in two groups,and the analgesic pump solution contained 1％ ropivacaine 400 mg diluted to 160 ml in 0.9％ sodium chloride injection.The analgesic pump was set up with a 5 ml bolus dose,a 30-main lockout interval and background infusion at a rate of 5 ml/h,and analgesia lasted until 72 h after operation.When visual analog scale score ＞ 4 and pain was not relived after 30-min pressing by patients,pethidine hydrochloride 100 mg was intramuscularly injected as rescue analgesic.The muscle strength of quadriceps femoris was assessed by manual muscle test at 4,8,24,48 and 72 h after operation.The patient's satisfaction score was assessed and recorded at 72 h after operation.Rescue analgesia and development of adverse reactions (local anesthetic intoxication,itching,dizziness,urinary retention,nausea and vomiting) were recorded within 72 h after operation.Results Compared with group F,the muscle strength of quadriceps femoris was significantly increased at 4,8 and 24 h after operation,the rate of postoperative rescue analgesia was decreased (P＜0.05),and no significant change was found in patient's satisfaction score or incidence of adverse reactions in group A (P＞0.05).Conclusion Adductor canal approach to saphenous nerve block provides better efficacy for postoperative analgesia than femoral triangle approach to saphenous nerve block in the patients undergoing knee arthroplasty.
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Two strains of porcine reproductive and respiratory syndrome virus (PRRSV) were isolated in 2006 and 2016 and designated as FZ06A and FZ16A, respectively. Inoculation experiments showed that FZ06A caused 100% morbidity and 60% mortality, while FZ16A caused 100% morbidity without death. By using genomic sequence and phylogenetic analyses, close relationships between a Chinese highly pathogenic PRRSV strain and the FZ06A and FZ16A strains were observed. Based on the achieved results, multiple genomic variations in Nsp2, a unique N-glycosylation site (N³³→K³³), and a K151 amino acid (AA) substitution for virulence in the GP5 of FZ16A were detected; except the 30 AA deletion in the Nsp2-coding region. Inoculation experiments were conducted and weaker virulence of FZ16A than FZ06A was observed. Based on our results, a 30 AA deletion in the Nsp2-coding region is an unreliable genomic indicator of a high virulence PRRSV strain. The Nsp2 and GP5 differences, in addition to the virulence difference between these two highly pathogenic PRRSV strains, have the potential to be used to establish a basis for further study of PRRSV virulence determinants and to provide data useful in the development of vaccines against this economically devastating disease.
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Humans , Asian People , China , Genomics , Mortality , Phylogeny , Porcine Reproductive and Respiratory Syndrome , Porcine respiratory and reproductive syndrome virus , Vaccines , VirulenceABSTRACT
Objective To analyze the alkaloids in the different parts of Aconitum wulingense by HPLC-ESI-Trap-MS. Methods The Agilent XDB-C18(250 mm×4.6 mm, 5 μm) column with gradient elution of 0.1% solvent (A)-acetonitrile(B), at a flow rate of 1 ml/min was used. The column temperature was set at 30 ℃. The MS analysis was based on positive ions mode. Results In the roots, a total of 61 diterpenoid alkaloids were discovered, among which 46 were identified. In the stems, 38 alkaloids have been found, among which 33 alkaloids were identified and 27 were the same with the roots. In the leaves, 18 alkaloids have been detected and 8 were the same with the roots. Conclusions The method is accurate, reliable and efficient, and is suitable for rapid identification of ingredients in Aconitum wulingense, which provides a reference for the development and utilization of Aconitum wulingense and clarify its efficacy and material basis.
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Objective To isolate and identify 3 flavonoids (taxifolin, orobol and quercetin) from Cudrania tricuspidata, and develop a method for determining 3 flavonoid constituents in Cudrania tricuspidata. Methods Three flavonoids was isolated from ethanol extract of Cudrania tricuspidata by chromatography, and its structure was identified by nuclear magnetic resonance. The analysis was conducted on an Aglient C18 column (4.6 mm ×250 mm, 5 μm) eluted with 1％ acetic acid and methanol as mobile phases in gradient mode. The flow rate was 1 ml/min and the detection wavelength was set at 310 nm. The column temperature was 25 ℃. Results Taxifolin, orobol and quercetin were isolated from ethanol extract of Cudrania tricuspidata by chromatography. The content of taxifolin, orobol and quercetin were 0.850 mg/g, 0.518 mg/g, 0.103 mg/g. Conclusion The method can be used for the quality control of Cudrania tricuspidata as a reference.
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Objective To investigate the clinical significance of CD55,CD59 and Aeromonas hydrophila toxin variant (FLAER) in the diagnosis of anemia and paroxysmal nocturnal hemoglobinuria (PNH).Methods Collected 30 healthy controls,22 cases of PNH,33 cases of aplastic anemia (AA),37 cases of iron deficiency anemia (IDA),45 cases of megaloblastic anemia (MA),30 cases of hemolytic anemia (HA) and 31 cases of myelodysplastic syndrome (MDS) from January 2009 to March 2017,CD55,CD59 and FLAER negative cell ratio of peripheral blood neutrophil of them were detected by multipa rameter flow cytometry.Results The detection rates of FLAER in PNH,AA and MDS groups were higher than those of CD55 and CD59,but there was significant difference in AA (x2 =7.759,5.518,P=0.005,0.019＜0.05).The average CD55,CD59 and FLAER deletion rate in PNH and AA group were significantly higher than those in normal control group and other groups (t=2.163～17.890,P=0.000～0.038＜0.05).The number of FLAER in PNH group was higher than CD59 and CD59 was higher than CD55 with the statistically significant difference (t=2.503 ～ 6.308,P=0.000 ～0.016＜ 0.05).Conclusion CD55,CD59 and FLAER have important value in the diagnosis of PNH and differential diagnosis with other anemia diseases,and can also be used to detect the presence of MDS and AA in patients with PNH.FLAER outperforms CD59,CD59 outperforms CD55.
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Objective To compare the organ coefficients and expressions of hypoxia-related genes in Bama and Juema pigs.Method Real-time quantitative PCR was used to detect the changes of hypoxia gene expressions in the heart,liver,spleen,lung,and kidney of Juema and Bama miniature pigs.Results The organ coefficients of kidney and spleen of Juema pigs were significantly lower than Bama miniature pigs (P<0.05 for both).The heart and lung coefficients of Juema pigs were significantly higher than that of Bama miniature pigs (P<0.05 for both).The VEGF and HIF-1α expressions in the lung and kidney in Juema pigs were significantly higher than Bama pigs (P<0.05 or P<0.01).Only the EPO expression in in the lung of Juema pigs was significantly higher than that of the Bama miniature pigs (P<0.05).Conclusions These results indicate that the variation in organ coefficients may be resulted from evolutionary factors such as adaptiveness to environmental physical and energy conditions,pathogens,and energy metabolism demands,etc.in combination.Juema miniature pigs showing a significantly higher expression of hypoxia-related genes than that in Bama minipigs indicate that it has a strong plateau adaptability by higher gene expressions.
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Objective To observe the effects of liraglutide on GRP78,ATF4,CHOP and TRB3 protein and mRNA expression in rats which fed with high fat diet,and to explore the effect of liraglutide on ATF4/CHOP pathway of pancreas in rats fed with high fat diets.Methods Forty-four male Wistar rats were randomly divided into the control group,high fat group,intervention group 1 and intervention group 2,11 cases in each group.The control group was fed with common food,other 3 groups were fed with high fat diet for 8 weeks.Then the intervention group 1 was given with liraglutide (100 μg · kg-1 · d-1) by subcutaneous injection;the intervention group 2 was given liraglutide (200 μg · kg-1 · d-1) by subcutaneous injection.After 2 weeks medication intervention,the rats were killed.Five rats were taken from each group and performed the hyperinsulinemic englycemic clamp experiment under waking state for calculating the glucose infusion rate (GIR).The fasting blood glucose (FBG),fasting insulin (FINS),serum free fatty acid (FFA),total cholesterol (TC),triglyeeride (TG),low density lipoprotein cholesterol (LDL-C) and high density lipoprotein(HDL) were examined,and islet beta cell function index(HOMA-β) were calculated.PCR and Western blot method were used to detect the expression of pancreas GRP78,ATF4,CHOP and TRB3 protein and mRNA.Results Compared with the control group,the levels of FBG,FFA,TC,FINS,TG and LDL-C in the high fat group were significantly increased,the levels of HDL-C,GIR and HOMA-β were significantly decreased(P＜0.05 or P＜0.01);compared with the high fat group,the levels of HDL-C,GIR and HOMA-β in the intervention group 2 were increased(P＜0.05 or P＜0.01),the other indicators were significantly decreased;compared with the intervention group 1,blood FGB,FFA,TC in the intervention group 2 were decreased,while the levels of GIR and HOMA-β were increased(P＜0.05).Compared with the control group,expression of GRP78,ATF4,CHOP and TRB3 protein and mRNA in the high fat group were significantly increased;compared with the high fat group,the expression of GRP78,ATF4,CHOP and TRB3 protein and mRNA in the intervention group 1 and 2 were gradually decreased with the liraglutide concentration increase.Conclusion Liraglutide can improve insulin resistance and protect pancreatic beta cells in a concentration-dependent manner,its mechanisms may involve in the pancreatic endoplasmic reticulum ATF4/CHOP pathway.
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Objective To observe the effects of liraglutide on GRP78,ATF4,CHOP and TRB3 protein and mRNA expression in rats which fed with high fat diet,and to explore the effect of liraglutide on ATF4/CHOP pathway of pancreas in rats fed with high fat diets.Methods Forty-four male Wistar rats were randomly divided into the control group,high fat group,intervention group 1 and intervention group 2,11 cases in each group.The control group was fed with common food,other 3 groups were fed with high fat diet for 8 weeks.Then the intervention group 1 was given with liraglutide (100 μg · kg-1 · d-1) by subcutaneous injection;the intervention group 2 was given liraglutide (200 μg · kg-1 · d-1) by subcutaneous injection.After 2 weeks medication intervention,the rats were killed.Five rats were taken from each group and performed the hyperinsulinemic englycemic clamp experiment under waking state for calculating the glucose infusion rate (GIR).The fasting blood glucose (FBG),fasting insulin (FINS),serum free fatty acid (FFA),total cholesterol (TC),triglyeeride (TG),low density lipoprotein cholesterol (LDL-C) and high density lipoprotein(HDL) were examined,and islet beta cell function index(HOMA-β) were calculated.PCR and Western blot method were used to detect the expression of pancreas GRP78,ATF4,CHOP and TRB3 protein and mRNA.Results Compared with the control group,the levels of FBG,FFA,TC,FINS,TG and LDL-C in the high fat group were significantly increased,the levels of HDL-C,GIR and HOMA-β were significantly decreased(P＜0.05 or P＜0.01);compared with the high fat group,the levels of HDL-C,GIR and HOMA-β in the intervention group 2 were increased(P＜0.05 or P＜0.01),the other indicators were significantly decreased;compared with the intervention group 1,blood FGB,FFA,TC in the intervention group 2 were decreased,while the levels of GIR and HOMA-β were increased(P＜0.05).Compared with the control group,expression of GRP78,ATF4,CHOP and TRB3 protein and mRNA in the high fat group were significantly increased;compared with the high fat group,the expression of GRP78,ATF4,CHOP and TRB3 protein and mRNA in the intervention group 1 and 2 were gradually decreased with the liraglutide concentration increase.Conclusion Liraglutide can improve insulin resistance and protect pancreatic beta cells in a concentration-dependent manner,its mechanisms may involve in the pancreatic endoplasmic reticulum ATF4/CHOP pathway.
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OBJECTIVE:To optimize the decolorization condition for polysaccharide extract of Mongolian medicine Vicia amoena,and to establish the method for its extraction and content determination. METHODS:The water extract-alcohol precipita-tion was used to extract polysaccharide from Mongolian medicine V. amoena. Using decolorization rate as index,orthogonal test was designed to investigate the effects of the dosage of activated carbon,decolorization temperature,decolorization time on the de-colorization of polysaccharide,so as to optimize the conditions for the decoloration of polysaccharide. Using glucose as control, phenol sulfuric acid method was adopted,and the content of polysaccharide in crude polysaccharide was determined by UV spectro-photometry at 490 nm. RESULTS:The optimal decoloration condition was as follows as actived carbon of 3%,decoloration time of 40 min,decoloration temperature of 60 ℃. On this basis,the average decolorization rate reached 19.77%(RSD=1.85%,n=3) by the verification test of the decoloration. The average extraction yield for the crude polysaccharide was 4.56%(RSD=2.38%,n=3),of which the polysaccharide content was 1.98%(RSD=2.18%,n=4). CONCLUSIONS:This experiment has relatively good reproducibility in polysaccharide yield;established method for content determination of polysaccharide is stable and feasible.
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Four new phenolic glycosides, including two flavonoid glycosides (and) and two lignan glycosides (and), were isolated from the traditional Chinese medicine formula, Baoyuan decoction. Their structures were established by detailed analysis of the NMR and HR-ESI-MS spectroscopic data and their absolute configurations were determined by the experimental electronic circular dichroism data as well as chemical methods. Furthermore, the sources of the four new compounds were determined by the UPLC-Qtrap-MS method, which proved thatandare originated from, andandare from.
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Objective To understand the personality characteristics of excellent and generalnurses, extract personality characteristics from excellent nurses, and to establish Personality Characteristics Questionnaire and post personality model of nurses, and explore influencing factors of nurses personality characteristicsfor providing a theoretical reference in selection and training of nurses. Methods A total of 523 staff nurses from one class 3-A hospital general hospitalsin Shandong province were investigated with Sixteen Personality Factor Questionnaire(16PF). Results Excellent nurses possessed higher dominance, rule-consciousness, social boldness, shrewdness, perfectionism and lower apprehension than general nurses (t=-2.54-2.92, P<0.05), then six personality characteristics were extracted from excellent nurses to establish Personality Characteristics Questionnaire and post personality model of nurses; The difference was statistically significant in perfectionism with different age, work experience, and professional title in excellent of nurses (F=4.04-7.36, P < 0.05). Conclusions 16PF is suitable for evaluating personality characteristics of nurses, the personality characteristics questionnaire and post personality model can be used as selection criteria for new nurses.
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Objective To investigate the difference of the expression of hypoxia reaction genes of vascular endothelial growth factor(VEGF),erythropoietin (EPO) and hypoxia-inducible factor-1 alpha (HIF-1α)) at different times of rats that were induced epilepsy by kainic acid (KA),and analyze their correlation.Methods The epileptic rat model was established by intraperitoneal injection of kanic acid.The expression of VEGF,EPO and HIF-1α gene were detected by real-time fluorescent quantitative PCR assay with TaqMan probe in different times after intraperitoneal injection of KA.Results Compared with normal sodium (NS) group,the expression VEGF was higher at 12 h((8.38±1.27) ×10-3 ng/μl,P＜0.05)) and 24 h((8.30±5.08) ×10-3 ng/μl,P＜0.05)),EPO was higher at 12 h((8.42±0.90) × 10-5 ng/μl,P＜0.05)) and 48 h ((1.50±3.25) × 10-2 ng/μl,P＜0.01)) while the HIF-1α was higher at 24 h((2.11±0.21) × 10-2 ng/μl,P＜0.01)),48 h((1.50±0.33) × 10-2 ng/μl,P＜0.05))and 72 h((1.64±0.16) × 10-2 ng/μl,P＜0.01)).Furthermore,the expression of EPO showed significant correlations with HIF-1α and VEGF (r=0.573,0.471,P＜0.05),VEGF and HIF-1α had eminent correlations (r=0.803,P＜0.01).Conclusions The expression of VEGF,EPO and HIF-1α participate in the seizure procedure and there is certain correlation between the three genes.