The relationship between plasma phosphorylated α-synuclein and cognitive impairment in patients with Parkinson disease / 中华行为医学与脑科学杂志

Objective:To investigate the relationship between plasma phosphorylated α-synuclein (ps129-α-syn) and cognitive function in Parkinson disease (PD).Methods:This study recruited 90 PD patients who were hospitalized in the Department of Neurology, Henan province people's hospital from March 2019 to June 2020.Forty healthy middle-aged and elderly people with normal cognitive function who came to the hospital for physical examination were selected during the same period.Clinical characteristics and blood samples were collected.Patients with PD were classified into those with normally cognitive (PD-NC), mild cognitive impairment (PD-MCI), and dementia (PDD). The enzyme-linked immunosorbent assay was used to measure the plasma ps129-α-syn.Correlations between plasma ps129-α-syn and clinical characteristics such as disease duration, Hoehn-Yahr stage (H-Y), unified Parkinson's disease rating scale (UPDRS), Montreal cognitive assessment (MoCA), 14-item Hamilton anxiety rating scale (HAMA-14), the 24-item Hamilton depression rating scale (HAMD-24), levodopa equivalent daily dosage (LEDD), the scale of outcomes in Parkinson's disease for autonomic symptoms, SCOPA-AUT) were analyzed using Pearson or Spearman correlation analysis.Multiple linear regression analysis was used to evaluate the factors affecting the cognitive function of PD.Results:Plasma ps129-α-syn in PD patients was higher than that in healthy controls((19.44±8.93)μg/L, (10.78±5.87)μg/L, ( t=5.615, P<0.01). Plasma ps129-α-syn was higher in PD-MCI group((19.64±7.77)μg/L)and PDD group((23.79±9.47)μg/L) compared with that in PD-NC group((13.37±5.40)μg/L)( P<0.05). Plasma ps129-α-syn was positively correlated with H-Y ( r=0.404, P<0.01), UPDRS-Ⅲ( r=0.275, P=0.009), UPDRS-total ( r=0.211, P=0.046) and SCOPA-AUT( r=0.335, P=0.001). Plasma ps129-α-syn was negatively associated with MoCA ( r=-0.459, P<0.01). Multiple linear regression analysis suggested disease duration ( t=-4.618, P<0.01), ps129-α-syn( t=-3.792, P<0.01) and UPDRS-total ( t=-2.826, P=0.006) were independently associated with cognitive function.Plasma ps129-α-syn could discriminate between PD-NC and PD cognitive function impairment with an AUC of 0.7797 (95% CI: 0.686 3-0.873 2, P<0.01). Conclusions:Plasma ps129-α-syn is correlated with cognitive function and the severity of motor symptoms in PD patients, and have high sensitivity and specificity in diagnosing PD cognitive dysfunction.Therefore, plasma ps129-α-syn can serve as a biomarker to assess cognitive function in PD.

Changes in clinical signs and laboratory indicators and their risk-tiering diagnostic effectiveness in elderly patients with pulmonary embolization with different risk levels / 中华老年医学杂志

Objective:To investigate the changes in clinical signs and laboratory testing results and their risk-tiring diagnostic effectiveness in elderly patients with pulmonary embolization (PE) with different risk levels.Methods:A retrospective analysis was conducted on the clinical data of elderly hospitalized PE patients in Beijing Hospital and other coordinated hospital from 2012 to 2020.Differences in 43 clinical signs and detection indicators between patients with four different risk levels were compared.The univariate and multivariate regression models were used to analyze differences between high-risk and non-high-risk PE and between intermediate-risk and low-risk PE with ROC analysis.Results:In the multi-group comparison, there are 33 clinical tests having significant differences between four risk groups, 29 clinical tests having significant differences between three risk groups(high, intermediate and low groups), and 21 clinical tests having significant differences between two groups(high and non-high groups). In the ROC analysis of risk stratification in high-risk and non-high-risk groups, it was found that the range of area under the curves(AUC)of 14 significantly changed clinical tests were 0.611 to 0.802 in the univariate regression analysis.The AUC of the model of systolic blood pressure(SBP)combined with white blood cell count(WBC)and aspartate aminotransferase(AST)was 0.8593(95% CI: 0.795-0.924)in the multivariate regression analysis.While in the ROC analysis between intermediate-risk and low-risk, the range of AUC of 12 significantly changed clinical tests were 0.592 to 0.835 in the univariate regression analysis.The B-type natriuretic peptide(BNP)and N-terminal B-type natriuretic peptide(NT-proBNP)can assist the risk stratification in intermediate-risk and low-risk PE groups.No efficient combined diagnosis model was found. Conclusions:The basic vital signs and multiple clinical laboratory tests were significantly different among four risk levels of elderly PE patients, such as blood gas analysis, coagulative function, liver and kidney function and myocardial markers.The combination of SBP, WBC, and AST can effectively assist the risk stratification in high-risk and non-high-risk PE groups.

Partition of abdominal infection: exploration and innovation of the abdominal partition under intra-abdominal infection / 中华消化外科杂志

Source control is the core of intra-abdominal infections (IAIs) treatment, in which precise positioning and effective drainage is the key and aporia. On the basis of membrane anatomy theory and understanding of anatomic structural abnormality under IAIs, the authors propose the concept of 'abdominal partition under IAIs’ in order to locate the source of infection and design of safe drainage path precisely, which could improve the diagnosis and treatment of IAIs and the prognosis.

Optimization of the Solution Preparation in Related Substance Test of Cefotaxime Sodium by Orthogonal Test / 中国药房

OBJECTIVE:To optimize the solution preparation in related substance test of cefotaxime sodium.METHODS:HPLC method was adopted to determine the total amount of impurities in cefotaxime sodium.Using phosphoric acid buffer solution pH,placing temperature,standing time and illumination as factor,the total amount of impurities as indexes,the preparation condition of solution was optimized by L9(34) orthogonal test.The validation test was carried out.RESULTS:The optimal preparation method was as follows as the sample was dissolved with a solvent containing pH 6.50 phosphate buffer protected from light.The test temperature and the sample temperature were set at 5 ℃,and the sample was injected within 5 min after the preparation of the solution.CONCLUSIONS:The optimized method is reproducible and reliable.

Construction and identification of the recombinant retroviral vector to carry out hypoxia-regulated expression of neurotrophin-3 / 西安交通大学学报(医学版)

Objective To construct and identify the recombinant retroviral vector containing five copies of hypoxia responsive elements (5HRE)and neurotrophin-3 (NT-3 ).Methods Using PCR,enzyme digestion and DNA ligase,5HRE and human derived NT-3 were cloned into the retroviral vector plasmid (pLNCX)to construct the recombinant retroviral vector plasmid pLNCX-5HRE-SV40-NT3-IRES-EGFP.The retrovirus RV-5HRE-NT3 was packaged in the PT67 cells,and then it was purified and concentrated by high-speed centrifugation.After infected for 48 h with the concentrated retrovirus,the number of the EGFP positive cells in the NIH 3T3 cells was counted by fluorescence activated cells and sorted to calculate the retrovirus titer.Results The retroviral vector plasmid,pLNCX-5HRE-SV40-NT3-IRES-EGFP,was successfully constructed,and the retrovirus was packaged and defined as RV-5HRE-NT3.After purification and concentration,the retrovirus titer reached 9.1 × 10 6 cfu/mL. Conclusion The recombinant retroviral vector which carried out hypoxia-regulated expression of NT-3 was successfully constructed.It may provide basis for studies on hypoxia-regulated expression of the exogenous genes.

The optimized culture and identification of astrocytes from rat cortical tissue / 西安交通大学学报(医学版)

Objective To obtain highly purified astrocytes and identify the cells in each stage to support further studies.Methods The cerebral cortex of a neonatal SD rat was isolated and prepared into single cell suspension.The obtained cells were purified by differential adherence and shook at a constant temperature.By inverted phase contrast microscopy and HE staining,cell morphology was observed.The immunofluorescence staining with anti-mouse GFAP was used to identify the cells.Results The primary cortical cells developed rapidly at 3 d after culture and covered the flasks at 9-12 d.At this time,the cells showed stratification and the astrocytes lay at the lower layer.GFAP positive rate was only about (67.2 ±7.1)%.After the first passage,GFAP positive rate increased obviously (84.0±6.0)%. However, oligodendrocytes and microglias could not be removed completely,and the cells also showed stratification.Through 3 times of passages,we obtained many single species of astrocytes showing satellite shape with 2 or 3 processes,big cell body and round or oval-shaped nuclei leaned to one side.Immunofluorescence staining showed that nearly all of the cells were strong positive and the positive rate reached as high as (97.6 ± 2.4 )%.Conclusion Through differential adherence and shaking at a constant temperature,more astrocytes of high purity and in good state can be obtained.

Neurogenesis in the dentate gyrus of the hippocampus in a rat model of intracerebral hemorrhage / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate whether intracerebral hemorrhage (ICH) can promote neurogenesis in the dentate gyrus (DG) of rat hippocampus.</p><p><b>METHODS</b>Western blot analysis, immunohistochemical staining, and immunofluorescent double labeling combined with confocal microscope were used to detect neurogenesis in the DG of the hippocampus in rats after ICH.</p><p><b>RESULTS</b>The expression of DCX protein in the ipsilateral DG of the hippocampus was enhanced in the rats 1 day after ICH (0.202∓0.062) as compared with that in normal rats (0.127∓0.088), reaching the peak level at 14 days (0.771∓0.108, P<0.01) and beginning to decrease at 28 days (0.582∓0.121, P<0.01). Meanwhile, DCX-positive cells and BrdU-positive cells, and DCX/BrdU double-labeled cells were detected in the DG of the hippocampus. Compared with those in the control group, BrdU/NeuN double-labeled cells were markedly increased in the granular cell layer of the DG at 28 days after ICH (1.808∓1.020 vs 5.654∓1.671, P<0.01).</p><p><b>CONCLUSION</b>ICH can promote neurogenesis in the DG of rat hippocampus.</p>

Salidroside protects cultured rat subventricular zone neural stem cells against hypoxia injury by inhibiting Bax, Bcl-2 and caspase-3 expressions / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the effects of salidroside (sal) on the expressions of Bcl-2, Bax and caspases-3 proteins in cultured rat subventricular zone (SVZ) neural stem cells (NSCs) exposed to hypoxia injury.</p><p><b>METHODS</b>Primarily cultured SVZ NSCs from adult SD rats were incubated with salidroside (120 and 240 µmol/L) for 24 h prior to exposure to hypoxia. The cell viability was assessed with MTT assay, and the cell apoptosis was analyzed using TUNEL staining and flow cytometry. Western blotting was performed to detect the expressions of Bcl-2, Bax and caspase-3 in the cells.</p><p><b>RESULTS</b>Salidroside pretreatment of the cells for 24 h resulted in an obvious resistance to hypoxia-induced cell apoptosis and decrement of cell viability (P<0.05). Salidroside also antagonized the effect of hypoxia exposure in lowering Bcl-2/Bax ratio apoptosis of rat neural stem cells and decreased the expression of caspases-3 protein (P<0.05).</p><p><b>CONCLUSION</b>Salidroside can significantly resist hypoxia-induced. The neuroprotective effect of salidroside may be related to the modulation of expressions of apoptosis-related proteins.</p>

Ventricular and subventricular zones under the frontal cortex of human fetus: development and distribution of nestin-positive cells / 南方医科大学学报

<p><b>OBJECTIVE</b>To observe the morphological changes during development of the ventricular zone (VZ) and subventricular zone (SVZ) of human fetus and the distribution pattern of neural stem cells in the VA and SVZ.</p><p><b>METHODS</b>Human fetuses at the gestational ages of 9-11 weeks, 14-16 weeks, 22-24 weeks and 32-36 weeks were collected, and the brain sections of the VZ/SVZ under the frontal lobe were examined for cytoarchitecture and distribution of nestin-positive cells with HE staining, immunohistochemistry or immunofluorescence.</p><p><b>RESULTS</b>The thickness of VZ underwent no significant changes at the gestational ages of 9-24 weeks (P>0.05) and became obviously thinner at 32 weeks (P<0.05), while the thickness of SVZ increased during 9-24 weeks (P<0.05) without obvious thinning at 32 weeks (P>0.05). VZ was thicker than SVZ at 9-11 weeks but became markedly thinner than SVZ after 14 weeks (P<0.05). The VZ contained denser cells than SVZ and showed a distinct boundary between the VZ and SVZ. Large numbers of nestin-positive cells were detected in the VZ and SVZ, and nestin immunoreactivity was found primarily in the cell processes and occasionally in the soma. Some nestin-positive cells in the SVZ had 1-3 processes. Nestin immunoreactivity in the VZ and SVZ gradually grew weak with development. The cells positive for both nestin and Ki67 were located mainly in the inner zone of the VZ and throughout the SVZ, where some nestin-positive but Ki67-negative cells were also found.</p><p><b>CONCLUSION</b>The SVZ fully extends and the neural stem cells in the VZ/SVZ can be morphologically heterogeneous during the development of fetal human brain.</p>

New Progress of The Research of Liposome / 浙江中医药大学学报

[Objective]This paper summarizes the latest literature,which can offer more choices for making liposome drug.[Methods]This article summarizes the application of liposomes in al aspects and new preparation methods and modification methods and their respective advantages. [Results]Liposome as a new type of drug carrier,which has similarity with biological membrane,has many good qualities and changes the traditional way to give medicine. [Con-clusion]Liposome has the broad application after nearly forty years of research.

Correlation of plasma cytokine profiles with age, smoking and alcohol drinking behaviors / 中华老年医学杂志

Objective To study the differences in levels of plasma cytokine profiles including interleukin-6 (IL-6),interleukin-10 (IL-10),tumor necrosis factor-alpha (TNF-alpha) and C-reactive protein (CRP) between healthy controls and people with smoking and alcohol drinking behaviors at different ages,and to investigate the correlation of plasma cytokine profiles with age,smoking and alcohol drinking behaviors.Methods The concentrations of IL-6,IL-10,TNF-alpha and CRP in 350 healthy volunteers,60 cigarette smokers and 65 people with smoking and alcohol drinking behaviors were detected by ELISA.All subjects were grouped by age,gender,smoking and alcohol drinking behavior.The differences in the levels of plasma cytokine profiles among groups were analyzed by statistics software SPSS18.0.Results The concentrations of IL-6 and CRP in 25-39years,40-49 years,50-59 years and over 60 years groups were (1.1±0.7) ng/L,(1.5±0.1) ng/L,(1.7±0.2) ng/L,(2.1±0.1) ng/L and (3.1±1.0) mg/L,(4.4±±0.6) mg/L,(6.2±1.7) mg/L,(8.0±0.8) mg/L,respectively.The concentrations of IL-6 and CRP were significantly increased with age (F=1.60,7.50,P=0.012,0.043),while the concentrations of IL-10 and TNF-alpha were not correlated with age (F=4.20,4.80,P=0.178,0.421).There were no significant differences in the concentrations of IL-6,IL-10,TNF alpha and CRP between males and females (P＞0.05).The plasma CRP level was higher in smoking group than in control group [(6.8±0.6) mg/L vs.(3.1± 0.4) mg/L] and was highest in smoking-alcohol group [(9.5±0.5) mg/L vs.(6.8±0.6) mg/L,(3.1±0.4) mg/L,F=8.40,P=0.046].Compared with the control group,IL-6 level was increased and IL-10 level was decreased in smoking group and smoking-alcohol group.There were no significant differences in levels of IL-6,IL-10 and TNF-a among the three groups (F=2.90,4.30,4.80,P=0.089,0.672,1.231).Conclusions The plasma levels of IL-6 and CRP are significantly increased with age,but the plasma levels of IL-10 and TNF-a have no correlations with age.The plasma levels of IL-6,IL-10,TNF-a and CRP are not affected by gender.CRP level is significantly influenced by smoking and alcohol drinking behaviors,which should be taken into consideration to establish the reference values.

Developmental expression and cellular distribution of metabotropic glutamate receptor 5 in the frontal cortex of human fetus / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the expression of metabotropic glutamate receptor 5 (mGluR5) and its cellular distribution in the frontal cortex, ventricular zone (VZ) and subventricular zone (SVZ) in human fetuses.</p><p><b>METHODS</b>According to the gestational age, the collected fetuses were divided into 4 groups, namely 9-11 weeks, 14-16 weeks, 22-24 weeks and 32-36 weeks. Brain tissue blocks including the frontal lobe or VZ/SVZ were prepared into slices, and the expression pattern and cellular distribution of mGluR5 in the frontal cortex and VZ/SVZ were observed by immunohistochemistry or immunofluorescence.</p><p><b>RESULTS</b>mGluR5 immunoreactivity was present in the cell membrane in the frontal cortex, VZ and SVZ from the 9th to 36th weeks and the immunoreactivity in the marginal zone (MZ) and cortical plate (CP) was markedly stronger than that in VZ and SVZ. The cells expressing mGluR5 included neural stem/progenitor cells in the VZ and SVZ, immature neurons in the VZ and MZ, and numerous mature neurons in the CP.</p><p><b>CONCLUSION</b>mGluR5 is expressed by a variety of cells such as neural stem cells in the frontal cortex, VZ and SVZ in human fetus, suggesting a role of mGluR5 in the development of human cerebral cortex.</p>

The correlation study of autoimmunity antinuclear antibody and aging / 中华老年医学杂志

Objective To investigate the influences of age and sex on the expression of serum antinuclear antibody (ANA) and its titer level.Methods The serum ANA in 993 people aged 60 years and over were detected and titer of positive serum were analyzed. They were divided into different groups according to age and sex. Two hundred healthy cases aged less than 60 years were collected as control group. Results The serum ANA positive rate was increased with age and it was significantly higher in people aged 60 years and over than aged less than 60 years (29. 1% vs. 14.0%, x2=5. 074, P=0. 025). The serum ANA positive rates were 24.1%, 30. 5% and 33.6% in people aged 60-69 group, aged 70-79 group and aged above 80 group. Among people aged 60 years and over, the positive rate was 35.8% in female group, which was higher than in male group (22. 4%) (x2= 21. 179, P=0. 05). The titre levels of the positive samples were increased with age. In control group, the samples with 1 : 100 titre was 57.1% among the positive samples, which was higher than in the elderly group (36. 3%). And in control group, the samples with 1 : 3200 titre was 0 among the positive samples, which was lower than in the elderly people group (7.6%). The ANA preliminary screening in people aged 60 years and over showed that the titre level was less than 1 : 320-1: 1000 in female and less than 1 : 100-1: 320 in male. Its specificity could be up to about 90%. Conclusions The serum ANA positive rate in people aged 60 years and over is affected by age and sex. The positive rate is higher in female than in male and it is increased with age. It suggests that 1 : 320 to 1 : 1000 could be taken as ANA preliminary screening critical value in female and 1 : 100 to 1 : 320 in male.

Behavioral change and cell proliferation in the subventricular zone in adult rats after intracerebral hemorrhage / 中南大学学报(医学版)

OBJECTIVE@#To investigate the relationship between behavioral changes and cell proliferation in subventricular zone (SVZ) after intracerebral hemorrhage (ICH) in adult rats.@*METHODS@#Forty male Sprague-Dawley rats were randomly assigned into a behavioral test group (n = 19) and a bromodeoxyuridine (Brdu) immunohistochemical staining group (n = 21). ICH was induced by stereotactial injection of collagenase type VII into straitum. Proliferating cells were labeled by injection intrapenitoneally of bromodeoxyuridine in a pulse protocal. Rats were killed on day 2, 7, 14, and 28 after the ICH. Behavioral test and bromodeoxyuridine immunohistochemical staining were performed.Behavioral change was tested by forelimb placing test, Berderson's grade and corner turn test in rats. Cell counting of bromodeoxyuridine immunoreactive cells in SVZ was performed.@*RESULTS@#There were marked neurological deficits by day 2 after the ICH, with progressive recovery of function over 4 weeks. A significant increase in the number of bromodeoxyuridine immunoreactive cells in the ipsilateral and cortralateral SVZ was observed from 2 to 14 days with a peak at day 7 after the ICH compared with the sham group.The bromodeoxyuridine immunoreactive cells decreased to control level 28 days after the ICH.@*CONCLUSION@#Proliferation of cells in SVZ corresponds well with behavioral recovery after the ICH, which indicates SVZ cells may be involved in the repairing process after the ICH.

Fungal Infection and Drug Resistance of Fungal Strains Isolated from Blood Culture / 中华医院感染学杂志

OBJECTIVE To investigate the current status about fungal infections in hospital and to provide the evidence to clinical treatment by identification,and susceptibility test for 62 strains of fungal infection in target population.METHODS The positive sample of blood culture was detected by Bio-Merieux Bact/Alert 3D fully automated microbial detect system,and the fungus identified by Bio-Merieux API 20C Aux yeast system,VITEK identification system,or YBC identification card.The susceptibility test perform by ATB Fungus 2 INT tip.The fungal strains were cultured with Sabouraud medium.RESULTS Among the 62 fungal strains,61 were Candida which accounted for 88.7%,from them C.albicans was predominan,accounted for 35.5%.Susceptibility rate to fluconazole,amphotericin B,itraconazole and flucytosine was 91.0%,100.0%,91.0%,and 100.0%.The distribution of fungi was higher in ICU accounted for 50.0% than in other wards.CONCLUSIONS The rate of the Candida especially C.albicans infection is increasing in Beijing Hospital.The result of susceptibility test showed that the fungi are good susceptibe to antifungal drugs.Highly resistant strain is rare,therefore,the clinics should choose the appropriate antifungal agents and minimize the incidents of resistance of fungal infections according to the culture and in vitro susceptibility of fungus.

A study on esophageal length of the adult Chinese by endoscope / 西安交通大学学报(医学版)

Objective To investigate whether there is a correlation between the esophageal length of the adult Chinese people and their height, sitting height, sex or age. Methods The length from the upper end of esophagus to the dentate line of the cardia was measured by watching esophageal cavity with endoscope. A total of 613 cases (378 males and 235 females) were studied. Results ① The average length of esophagus was (24.8?2.1)cm for male and (22.8?1.9)cm for female. The difference between male and female was statistically significant (P