Changes of FeNO, CRP and PCT levels in patients with bronchial asthma complicated with sleep apnea syndrome in Shanghai / 公共卫生与预防医学

Objective The changes and risk factors of FeNO, CRP and PCT in patients with bronchial asthma complicated with sleep apnea syndrome (SAS) in Shanghai area were analyzed to provide theoretical basis for the prevention and treatment of SAS in patients with bronchial asthma. Methods A total of 436 patients with bronchial asthma admitted to our hospital from January 2019 to June 2022 were selected and divided into control group and experimental group according to whether SAS occurred during hospitalization. The experimental group was divided into three subgroups according to the apnea hypopnea index (AHI) values: mild group (AHI>15 times /h or 15 times /h or 28 kg/m2(OR=5.629),allergic rhinitis(OR=6.166)and neck circumference>40 cm(OR=5.265)were independent risk factors for SAS in patients with bronchial asthma(P<0.05);Pearson correlation analysis showed that AHI was positively correlated with serum FeNO,CRP and PCT levels in patients with bronchial asthma and SAS(r=0.471,0.436,0.502,P<0.05). Conclusions Patients with old bronchial asthma in Shanghai area have a higher risk of SAS, and the severity of the disease is positively correlated with the levels of FeNO, CRP and PCT. In particular, obese patients with allergic rhinitis should be given early intervention to reduce the risk of SAS.

Effect of Toll-like receptor 4 on liver regeneration during acetaminophen-induced liver injury in mice / 临床肝胆病杂志

Objective To investigate whether Toll-like receptor 4 (TLR4) inhibition affects liver regeneration during acetaminophen (APAP)-induced liver injury in mice, as well as the mechanism of TLR4 involved in liver regeneration. Methods A total of 78 male CD-1 mice were divided into nine groups using a random number table, i.e., three control groups (normal control group, solvent control group, inhibitor control group) with 6 mice in each group and six experimental groups (APAP 24-hour group, TAK-242+APAP 24-hour group, APAP 48-hour group, TAK-242+APAP 48-hour group, APAP 72-hour group, TAK-242+APAP 72-hour group) with 10 mice in each group. The mice in the experimental groups were given a single dose of intraperitoneally injected APAP (300 mg/kg), and TAK-242 was intraperitoneally injected at a dose of 3 mg/kg at 3 hours before APAP administration. Serum and liver tissue samples were collected at different time points. The biochemical method was used to measure the serum level of alanine aminotransferase (ALT); HE staining was used to observe liver pathological changes; RT-PCR, Western blot, and immunohistochemistry were used to measure the expression levels of Cyclin D1, PCNA, Ki-67, STAT3, and p-STAT3. The t -test was used for comparison of normally distributed continuous data between two groups; a one-way analysis of variance was used for comparison between multiple groups, and the least significant difference t -test was used for further comparison between two groups. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups, and the Kruskal-Wallis H test was used for comparison between multiple groups and further comparison between two groups. Results Compared with the normal control group, the APAP 24-hour and 48-hour groups had a significantly higher serum level of ALT (both P < 0.05), and the TAK-242+APAP 24-hour and 48-hour groups had a significantly higher serum level of ALT than the APAP group at the same time point (both P < 0.05). HE staining showed typical central lobular necrosis in the liver of APAP-treated mice, and the TAK-242+APAP 24-hour and 48-hour groups had a significantly larger necrotic area than the APAP group at the same time point (both P < 0.05). RT-PCR, Western blot, and immunohistochemistry showed that the TAK-242+APAP 24-hour, 48-hour, and 72-hour groups had significantly lower mRNA and protein expression levels of Cyclin D1 than the APAP group at the same time point (all P < 0.05); the TAK-242+APAP 24-hour, 48-hour, and 72-hour groups had a significantly lower mRNA expression level of PCNA than the APAP group at the same time point (all P < 0.05), and the TAK-242+APAP 24-hour and 48-hour groups had a significantly lower protein expression level of PCNA than the APAP group at the same time point (all P < 0.05); the TAK-242+APAP 24-hour and 72-hour groups had a significantly lower mRNA expression level of Ki-67 than the APAP group at the same time point (all P < 0.05), and the TAK-242+APAP 24-hour, 48-hour, and 72-hour groups had a significantly lower protein expression level of Ki-67 than the APAP group at the same time point (all P < 0.05). In addition, the TAK-242+APAP 24-hour and 48-hour groups had a significantly lower phosphorylation level of STAT3 than the APAP group at the same time point (both P < 0.05). Conclusion TLR4 may promote liver regeneration by increasing the phosphorylation level of STAT3 during APAP-induced liver injury in mice.

Application of micro-lesson-based exploratory teaching model in postgraduate emergency clinical teaching / 中华医学教育探索杂志

Objective:To explore the application of micro-lesson-based exploratory teaching in postgraduate emergency clinical teaching.Methods:A total of 48 intern graduate students in the Emergency Department of Shengjing Hospital affiliated to China Medical University from January 2019 to December 2019 were selected as the research objects. According to the admission time, they were divided into observation group (28 cases) and control group (20 cases). The control group used traditional teaching. The observation group adopted exploratory teaching based on micro-classes. Theoretical and practical operating ability, basic clinical quality and clinical thinking ability, as well as the evaluation of teaching effect and the satisfaction with teaching method and teaching quality were compared between the two groups. SPSS 22.0 was used for t test and chi-square test. Results:The theoretical and practical performance scores of the observation group improved more than those of the control group ( P<0.05). The basic clinical quality and clinical thinking ability scores of the observation group improved more than those of the control group ( P<0.05). The improvement of the observation group's learning interest, learning efficiency, autonomous learning ability and comprehension memory scores was greater than that of the control group ( P<0.05). The observation group's satisfaction with teaching methods and teaching effects was significantly higher than that of the control group ( P<0.05). Conclusion:The use of micro-class-based exploratory teaching in postgraduate emergency clinical teaching can enrich students' theoretical knowledge, increase their learning motivation and interest in learning, and improve their practical ability, basic clinical quality and clinical thinking ability, which is a teaching method worth promoting.

Loss of monocarboxylate transporter 1 aggravates white matter injury after experimental subarachnoid hemorrhage in rats / 医学前沿

Monocarboxylic acid transporter 1 (MCT1) maintains axonal function by transferring lactic acid from oligodendrocytes to axons. Subarachnoid hemorrhage (SAH) induces white matter injury, but the involvement of MCT1 is unclear. In this study, the SAH model of adult male Sprague-Dawley rats was used to explore the role of MCT1 in white matter injury after SAH. At 48 h after SAH, oligodendrocyte MCT1 was significantly reduced, and the exogenous overexpression of MCT1 significantly improved white matter integrity and long-term cognitive function. Motor training after SAH significantly increased the number of ITPR2

Effects of low dose persistent organic pollutants on rats / 预防医学

Objective @#To evaluate the health effects of persistent organic pollutants（POPs）on body weight,food intake,internal organs,blood biochemistry,metabolic enzymes and antioxidant ingredients of rats. @*Methods @#Sixteen healthy Sprague-Dawley（SD）rats were randomly divided into the experimental group exposed to 10 mL/kg mixture of POPs（10 ng/mL PCBs,5 ng/mL PBDEs,1 ng/mL PCDD/F）everyday for 28 days by gavage,and the control group exposed to the same volume of soybean oil in the same way. Body weight and food intake of the rats were recorded regularly;blood routine and biochemical indices were detected;liver,kidney,spleen and testicles（ovary）of the rats were weighed to calculate organ coefficients;metabolic enzymes and antioxidant ingredients were detected from livers of the rats. @*Results @#No obviously abnormal symptoms and no deaths were found in both groups. Compared to the control group,the weekly food intake in the experimental group increased more for there was an interaction between grouping and time（P< 0.05）. The ratio of liver to body weight of male rats in the experimental group was higher than that in the control group [（3.87± 0.19）% vs.（3.53± 0.06）%,P< 0.05]. The haemoglobin and red blood cell of female rats in the experimental group were lower than those in the control group[（145.25± 6.18）g/L vs.（154.50± 4.20）g/L;（6.90± 0.14）× 1012/L vs.（7.39± 0.24）× 1012/L;both P< 0.05]. The glutathione-S-transferase（GST）of female rats in the experimental group was higher than that in the control group [（13.37± 1.05）U/mgprot vs.（9.43± 1.08）U/mgprot,P< 0.05]. The cytochrome P4501A1of rats in the experimental group was higher than that in the control group [female：（88.23± 5.81）ng/mgprot vs.（73.85± 5.86）ng/mgprot;male：（96.80± 13.32）ng/mgprot vs.（ 72.20± 2.01）ng/mgprot;both P< 0.05].@*Conclusion @#After exposed to low dose of POPs,the cytochrome P4501A1 increased in all rats,the liver to body weight ratio increased in male rats,GST activity increased while red blood cell and haemoglobin decreased in female rats,which indicated possible body damages in rats.

Protective effect of GW3965 on PQ-induced acute lung injury in mice via inhibition of p38MAPK signal pathway / 中华急诊医学杂志

Objective To investigate the protective effects and the possible mechanisms of GW3965, a liver X receptors (LXRs) agonist, in mice with PQ-induced acute lung injury. Methods A total of 40 male c57BL/6J mice were randomly(random number) divided into four groups. In control group, mice were intra-peritoneally injected with 0.1 mL normal saline solution twice at an interval of 10 min. In paraquat poisoning group, mice were intra-peritoneally injected with paraquat in a dose of 28 mg/kg and 0.1 mL normal saline solution 10 min later. In low dose GW3965 treatment group, mice were intra-peritoneally injected with GW3965 in a dose of 10 mg/kg 10 min after PQ administration. In high dose GW3965 treatment group, mice were intra-peritoneally injected with GW3965 in a dose of 50 mg/kg at 10 min after PQ administration. The mice were sacrifi ced at 72 h after PQ administration to collect lung tissues and blood specimens. Malonaldehyde(MDA) levels in blood were measured by thiobarbituric acid (TBA) method, and IL-1β and TNF-α levels in blood and lung tissues were measured using ELISA assay. Lung tissues were collected to determine the wet-to-dry (W/D) ratios ,histopathology changes by HE staining , and the levels of p38 MAPK, Bax and Bcl-2 were detected by Western blot as well as cell apoptosis by TUNEL. Multiple groups were compared with One-way ANOVA and pairwise comparison among groups were made by least signifi cance difference (LSD) determination. Results Compared with the control group, the PQ group had more severe lung injury, greater wet/dry weight ratio, higher MDA level in blood, higher IL-1β and TNF-α level in blood and lung tissues, higher expression of p38 MAPK, greater Bax/Bcl-2 ratio and greater numbers of cell apoptosis in lung tissues(P<0.05). GW3965 treatment attenuated all these changes(P<0.05), and the effect of GW3965 in high dose treatment group was more remarkable(P<0.05). Conclusion GW3965 significantly attenuates PQ-induced acute lung injury in mice. This effect may be associated with the inhibition of p38 MAPK signal pathway.

Application of different postoperative analgesia methods in unilateral breast cancer radical surgery / 临床麻醉学杂志

Objective To select the appropriate postoperative analgesia,through the application of different methods in the postoperative analgesia of the patients with breast cancer.Methods Ninety female patients undergoing unilateral breast cancer radical surgery in general anesthesia,aged 35-60 years,weighing 45-80 kg,falling into ASA physical status Ⅰ or Ⅱ,were ran domly divided into simple intravenous postoperative analgesia group (group P,n =30),local infiltration plus intravenous postoperative analgesia group (group R,n =30),ultrasound guided thoracic nerve block plus intravenous postoperative analgesia (group TP,n =30),group P used dexmedetomidine 2μg/kg plus sufentanil 2μg/kg,group R used 0.375％ ropivacaine 20 ml local infiltration added dexmedetomidine 2μg/kg plus sufentanil 2 μtg/kg,group TP used 0.375％ ropivacaine 20 ml vertebral side block added dexmedetomidine 2μg/kg plus sufentanil 2 μg/kg.The VAS scores and Ramsay score was recorded 6,12,24,48 h after surgery,the deep sleep quality score at preoperative postoperative 24 h and 48 h,the number of postoperative analgesia pump pressure,the use of sufentanil and the nausea,vomiting,itching,bradycardia,respiratory depression happened in 24 h were documented.Results The VAS scores in groups R and TP 6 h after surgery were significantly lower than that of group P.The VAS scores in group TP 12 h after surgery were significantly lower than that of groups R and P (P＜0.05).The sedation scores were not statistically significant among the three groups.The deep sleep quality scores at 24 h in group TP were significantly lower than those of groups R and P (P＜ 0.05).The number of compressions and the use of the sufentanil in 24 h after surgery in group TP were significantly lower than those of groups R and P,and that in group R was significantly lower than that in group P (P＜0.05).The incidence of nausea,vomiting,itching,bradycardia,respiratory depression were not statistically significant in 24 h,and there were no postopera tive complications related to neurologic blocking of lateral vertebral nerve.Conclusion Three methods were safe and effective for postoperative analgesia in patients with radical surgery breast cancer.Ultrasound guided by thoracic nerve block combined intravenous postoperative analgesia was obviously better than local infiltration plus infiltration postoperative analgesia and infiltration postoperative analgesia in terms of postoperative analgesia,quality of sleep and the number of sufentanil.

Application of doctor-patient communication education in emergency medicine / 中华医学教育探索杂志

How to deal with the relationship between doctors and patients has become one of the urgent clinical skills for emergency medical students in clinical study. In Shengjing Hospital of China Med-ical University, the emergency department introduced doctor-patient communication into clinical teaching, training students the skills of doctor-patient communication for improving the specific ability. In the clinical teaching of emergency department, doctor-patient communication was strengthened by improving the quality of teachers and the standards of teaching. Teachers encouraged medical students to rationally use body language, improve service levels, strengthen the legal concept, and so on to learn about the doctor-patient communi-cation and further master the skills of dealing with the doctor-patient relationship. Doctor-patient relation-ship education is one of the necessary means to reduce the contradiction between doctors and patients and promote the effective communication between doctors and patients, which is also beneficial to promote the harmonious development of doctor-patient relationship.

Effects of Epigallocatechin-3-gallate on Oxidative Stress and Inflammatory Factors in the Kidney Tissues of Rats with Paraquat Poisoning / 中国医科大学学报

Objective To investigate the effect of Epigallocatechin-3-gallate(EGCG)on oxidative stress and inflammatory factors in the kidney tissues of rats with paraquat poisoning,and explore the possible mechanism. Methods Rats were randomly divided into control group(group A), paraquat exposure group(group B),paraquat exposure+low dose of EGCG group(group C),and paraquat exposure+high dose of EGCG group (group D)(n=10 in each group). Kidney tissues were harvested and observed by HE staining. The level of creatinine was tested by biochemical detector. Serum oxidative stress and inflammatory factor level were detected by ELISA method. Oxidative stress in kidney tissue was determined by Western blotting and colorimetry. Inflammatory factor level in renal tissue was tested by real-time PCR. Results Kidney damage was observed in rats of groups B,C,and D. Rats in groups C and D showed less renal injury than group B,and high dose of EGCG(group D)enhanced kidney damage compared to the low dose(group C). Compared with group A,rats in the groups C and D showed lower level of 8-isoprostane,creatinine, interleukin-6(IL-6),and tumor necrosis factorα(TNF-α)in serum and malondialdehyde(MDA),3-nitrotyrosine(3-NT),and TNF-αand IL-6 mRNA in renal tissue in rats with paraquat poisoning,and group D showed the lowest mRNA level of inflammatory factor and oxidative stress. Con-clusion EGCG has protective effects on the kidney of rats with paraquat poisoning,and its mechanism may be related to the reduction of oxida-tive stress and inflammatory reaction in the kidney.

Effect of taurine on kidney injury induced by paraquat poisoning in rats / 中国病理生理杂志

AIM: To study the effects of taurine at different doses on renal oxidative stress and inflammation induced by paraquat in rats.METHODS: Male SD rats (n=48) were randomly divided into 4 groups: negative control group, paraquat group, paraquat + low-dose taurine group, and paraquat + high-dose taurine group.The serum levels of creatinine and urea nitrogen were detected by a biochemical analyzer.The levels of malondialdehyde (MDA) and superoxide dismutase (SOD) were measured by colorimetry.The plasma concentrations of IL-6 and intercellular adhesion molecule (ICAM)-1 were detected by ELISA.Renal reactive oxygen species (ROS) was checked by fluorescence probe dihydroethidium (DHE).The protein levels of renal p-P38 MAPK, p-ERK1/2 and p-JNK were determined by Western blot.The mRNA expression of TNF-α, IL-6 and TGF-β1 was detected by real-time PCR.RESULTS: Serum creatinine and urea nitrogen increased after paraquat poisoning, and decreased after feeding with taurine in poisoned rats, with better result in high-dose taurine group.Taurine reduced the oxidative stress and inflammation in the renal tissue, and also reduced the protein levels of p-JNK, p-ERK1/2 and p-P38 in the kidney of paraquat-poisoned rats.CONCLUSION: Taurine attenuates renal injury induced by paraquat poisoning in rats.The mechanism may be related to reducing renal MAPK activity, oxidative stress and inflammatory response.

Effects of receptor interacting protein (RIP)1 on isoniazid induced hepatocyte necroptosis in mice / 天津医药

Objective To study the relationship between receptor interacting protein (RIP)1 and hepatocyte necropto?sis in isoniazid (INH) induced mouse model. Methods Kunming male mice were randomly divided into three groups. Con?trol group (C) received 0.3 mL of normal saline one time per day. INH group (INH) was injected intraperitoneally INH 100 mg/kg body weight, one time per day. Nec-1+INH group was injected intraperitoneally Nec-1 in 0.1%DMSO and 1 mg/kg body weight one time/12 hours, and INH was injected intraperitoneally at the same dose with that of INH group. All animals were treated for 7 days. Pathological changes of liver tissues were studied by HE staining. RIP1 expression was detected by immunohistochemical, Western blot and real-time PCR analysis. Levels of malondialdehyde (MDA), reactive oxygen species (ROS), glutathione (GSH) and superoxide dismutase (SOD) in liver homogenate were determined by colorimetric method. Re?sults Hepatocytes were arranged orderly in C group. The degeneration and necrosis of hepatocytes were found in Nec-1+INH group, and severe degeneration and necrosis of hepatocytes were found in INH group. Compared with C group, the ex?pression levels of RIP1, ROS and MDA were increased significantly, and the expression levels of GSH and SOD were de?creased significantly in INH group (P<0.05). INH-induced acute liver necroptosis was significantly alleviated after treat?ment with Nec-1. Compared with INH group, the expression levels of RIP1, MDA and ROS were significantly decreased, and the expression levels of GSH and SOD were significantly increased in Nec-1+INH group (P<0.05). Conclusion These re?sults suggest that RIP1 is involved in INH-induced hepatocyte necroptosis in mice. The inhibition of RIP1 expression might be a treatment strategy for prohibition of INH-induced acute liver necroptosis.

Prognostic value of urine paraquat concentrations combined with poisoning time and creatinine clearance rate ;on prognosis in patients with acute paraquat poisoning / 中华危重病急救医学

Objective To evaluate the prognostic value of urine paraquat (PQ) concentrations combined with poisoning time and creatinine clearance rate (CCr) on prognosis of patients with acute paraquat poisoning (APP). Methods A retrospective case control study was conducted. Clinical data of 96 patients with APP admitted to Department of Emergency of Shengjing Hospital of China Medical University from March 2014 to May 2016 were analyzed. The gender, age, body weight, urine PQ concentrations (determined by semi-quantitative colorimetric method), poisoning time (time from oral poison to urine detection) and CCr of patients were collected, and poisoning index (poisoning index = urine PQ concentrations × poisoning time/CCr) and simplified poisoning index (simplified poisoning index = urine PQ concentrations × poisoning time) were calculated. The patients were divided into death group and survival group according to 2-month outcome after poisoned with clinical data and telephone follow-up. The urine PQ concentrations, poisoning index, and simplified poisoning index between the two groups were compared. Binary classification logistic regression was used to analyze the risk factors affecting prognosis. Receiver-operating characteristic curve (ROC) and diagnostic test were used to analyze the prognostic value of the parameters. Results Compared with survival group, the urine PQ concentrations [mg/L: 30.00 (10.00, 100.00) vs. 10.00 (3.00, 10.00)], poisoning index [mg·h-1·μmol-1: 12.72 (1.86, 33.75) vs. 0.56 (0.18, 1.12)], and simplified poisoning index [mg·h-1·L-1: 600.00 (150.00, 1 000.00) vs. 60.00 (18.00, 120.00)] in death group were significantly increased (all P < 0.01). It was shown by logistic regression analysis that both urine PQ concentrations [odds ratio (OR) = 1.046, 95% confidence interval (95%CI) = 1.006-1.087, P = 0.022] and poisoning index (OR = 1.353, 95%CI = 0.029-1.815, P = 0.031) were independent risk factors affecting the prognosis of patients with APP. It was shown by ROC curve and diagnostic test that the poisoning index had greater area under ROC curve (AUC was 0.902) for evaluating the prognosis of patients with APP. When the best cut-off value was greater than 1.23 mg·h-1·μmol-1, the sensitivity was 90.91%, and the specificity was 73.08%. The AUC of urine PQ concentrations for evaluating the prognosis was 0.759. When the best cut-off value was greater than 20.00 mg/L, the sensitivity was 63.64%, and the specificity was 76.92%. The AUC of simplified poisoning index for evaluating the prognosis was 0.846. When the best cut-off value was greater than 135.00 mg·h-1·L-1, the sensitivity was 81.82%, and the specificity was 76.92%. Conclusion The poisoning index calculated with urine PQ concentrations combined with poisoning time and CCr has prognostic value for prognosis of APP patients, and the prognostic value of poisoning index is greater than that of the urine PQ concentrations alone.

The relationships study between traditional Chinese medicine syndrome types and aspirin resistance of patients with acute cerebral infarction / 中国中西医结合急救杂志

Objective To investigate the relationships between aspirin resistance (AR) and laboratory indexes and different types of traditional Chinese Medicine(TCM)syndrome in patients with acute cerebral infarction. Methods Two hundred and eight different types of TCM syndromes of patients with acute cerebral infarction admitted from January 2012 to November 2013 in the Neurology Department of Shanghai Seventh People's Hospital were divided into AR group and aspirin sensitive(AS)group according to the rate of AR. Simultaneously,28 healthy volunteers in the same period were assigned in a healthy control group. The changes of red blood cell volume distribution width coefficient of variation(RDW-CV),platelet count(PLT)and homocysteine(Hcy)levels were observed in the three groups. The correlation between different types of TCM syndromes and AR,PLT,RDW-CV,and Hcy was analyzed by non-conditional logistic regression. Results The total incidence of AR was 29.32%(61/208)in 208 patients with acute cerebral infarction. There were 165 cases with Qi deficiency and blood stasis syndrome,the incidence of AR being 26.06%(43/165);32 cases with wind phlegm obstructing channel syndrome,the incidence of AR, 43.75%(14/32);11 cases with liver yang hyperactivity syndrome,the incidence of AR,36.36%(4/11);in the comparisons,the incidence rates of AR among the above types of syndromes had no statistical significant differences (P>0.05). Compared with the healthy control group,the levels of PLT,RDW-CV,Hcy in AR group and AS group of various types of TCM syndrome were increased,the PLT and RDW-CV levels in patients with Qi deficiency and blood stasis syndrome in AR group were more significantly elevated in the comparisons between AR and AS groups, there were statistical significant differences〔PLT (×109/L):212.16±66.48 vs. 187.54±56.85, RDW-CV:(14.34±3.16)% vs.(13.20±2.16)%,both P<0.05〕;the level of Hcy in patients with wind phlegm obstructing channel syndrome in AR group was increased more significantly than that in AS group,the difference between the two groups being statistically significant(μmol/L:27.29±18.64 vs. 21.36±14.61,P<0.05). Logistic regression analysis showed,increased PLT〔odds ratio(OR)=1.007 2,95%confidence interval(CI):1.001 2-1.013 2,P=0.018 5〕and RDW-CV〔OR=1.165 4,95%CI:1.007 9-1.347 4,P=0.038 8)was independence risk factor of AS development. Conclusion The elevation of RDW-CV,PLT,Hcy in level reflects the index of AR production, especially in patients with acute cerebral infarction accompanied by Qi deficiency and blood stasis syndrome and wind phlegm obstructing channel syndrome.

Correlations of PCBs, DIOXIN, and PBDE with TSH in children's blood in areas of computer E-waste recycling / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To study correlations of polychlorinated biphenyls (PCBs), DIOXIN, and polybrominated diphenyl ethers (PBDE) with thyroid stimulating hormone(TSH) in children, and assess the impact on children's health.</p><p><b>METHODS</b>Three hundred and sixty nine children aged from 6 to 8, including 195 from Luqiao, the computer E-waste recycling area, and 174 from Longyou, the control area, were selected for this investigation to elucidate the correlation of PCBs, DIOXIN, and PBDE with TSH in children's blood samples. The children had a physical examination and their blood levels of PCBs, DIOXIN, PBDE, and TSH were detected after sample collection.</p><p><b>RESULTS</b>In the E-waste recycling area, the contents of PCBs, PBDE, DIOXIN, and TSH in the blood samples of children were 484.00 ± 84.86 ng·g(-1) lipid weight, 664.28 ± 262.38 ng·g(-1) lipid weight, 26.00 ± 19.58 ng·g(-1) lipid weight and 1.88 ± 0.42 μIU/mL (serum) respectively, while in the control area, the PCBs, PBDE, DIOXIN, and TSH contents were 255.38 ± 95 ng·g(-1) lipid weight, 375.81 ± 262.43 ng·g(-1) lipid weight, 39.64 ± 31.86 ng·g(-1) lipid weight, and 3.31±1.04 μIU/mL respectively.</p><p><b>CONCLUSION</b>The health status of children in the control area are better than that in the contaminated area. Among children who are exposed to persistent organic pollutants, the pollutant content increases significantly in their serum, and the distribution of TSH levels in their bodies are also affected.</p>

Effects of robot model design on gait in patients with spinal cord injury / 中国组织工程研究

BACKGROUND: Therapist-assisted treadmill training is good gait training, but it consumes great physical strength of therapists, and requires many persons. Clinical application was limited. Robot-assisted treadmill training has been paid great attention. OBJECTIVE: To summarize the role of robot in recovery of walking after spinal cord injury (SCI) and its influence on muscle activation patterns and kinematic patterns.RESULTS AND CONCLUSION: Although there is currently no evidence that robot-assisted gait training improves walking function more than other locomotor training strategies. Several advantages of robotic devices are obvious for applications targeting gait rehabilitation. Robotic devices are passive in nature and focus primarily on repeated movements of the limbs via fixed kinematic trajectories. These types of training abolish the cycle-to-cycle variation in the kinematics and the sensorimotor pathways. They also cannot sensitively monitor important characteristics of the training as therapists do. Therapists need to know the robot devices, understand how to change parameters to continuously challenge the subjects, and are able to assess when the workload is inappropriate for the subject's abilities so that they can maximize voluntary locomotor performance during assisted stepping to augment the recovery of functional walking.

Culture of vascalar smooth muscle cells from rat cerebral vessels by enzymatic dispersion method / 中国药理学通报

Aim To develop a method of culturing rat basilar artery smooth muscle cells. Methods Basilar arteries were immediately removed and cut into 0.2 mm rings. Then they were incubated in a medium containing the following: collagenase (typeⅡ, 0.5 g?L-1), elastase (0.15 g?L-1), hyaluronidase (type Ⅳ-S, 0.5 g?L-1), and deoxyribonuclease (typeⅠ, 0.1 g?L-1) for 1 hour at 37℃. After digestion, cells were cultured in DMEM/F12 with 20% fetal calf serum and then plated onto plastic tissue culture dishes. Results After 3 days of incubation, primary cultures of rat basilar artery smooth muscle cells began to stick to the wall of the incubation dishes. Cells were passaged after one week and their viability was 97%. The purity of fourth passage cells was 98%, which assessed by immunohistochemical staining and morphology. Conclusion This method is simple, fast and easily adaptable to obtaining high yield and purity of basilar artery smooth muscle cells.