Cauda Equina ; injuries ; Decompression, Surgical ; Electric Stimulation Therapy ; Emergency Medical Services ; methods ; Fracture Fixation, Internal ; Humans ; Prognosis ; Spinal Cord Injuries ; prevention & control ; therapy ; Spinal Fractures ; surgery ; Spinal Fusion

A method of simultaneous determination of the eleven phenol and aniline dyes in oxidative hair dyes by ultrasonic-assisted extraction and high performance liquid chromatography-tandem mass spectrometry was developed. The orthogonal and single-factor experiments were designed to and optimize the ultrasonic-assisted extraction conditions, and the samples were extracted using 10 mL of 5% methanol under the conditions of ascorbic acid as an antioxidant for 10 min. The gradient elution program and the electrospray ionization mode change were together used for the optimization of the measurements, and the determinations were completed by using the multi-reaction monitoring scan. The detection limits were 1. 15-9. 43 μg/g, the recoveries of spiked samples were 88. 0%-118. 1%. The method can be used to determine trace prohibited and restricted dyes in hair dyes.

A questionnaire survey was conducted among undergraduate international students to investigate the effects of stomatology teaching.The effects of stomatology teaching had been proved to be fair, while some shortcomings had also emerged. In further teaching adjustments have to be made to teaching plans and teachers' Enghsh abilities are expected to be improved.

Abstract: Objective To investigate the impact of SARS-CoV-2 virus infection on the risk of thrombosis in COVID-19 outpatient patients with mild and regular symptoms. Methods Outpatient patients during the SARS-CoV-2 large-scale infection period after the policy adjustment for COVID-19 in Beijing in 2022 were selected as the observation group, and the dynamic zero-clearing period before the policy adjustment and outpatient patients during the 2022/2021/2020 period were taken as the three control groups. The patients with physiological factors that may increase the risk of coagulation, such as thrombotic diseases, malignant tumors, female pregnancy and other physiological factors, were excluded. Pediatric patients under 14 years old were also excluded. Age was expressed as median (interquartile). The changes in blood routine, fibrin/fibrinogen degradation products, and D-Dimer in Beijing outpatient patients were studied with statistical method and data analysis techniques. Results Compared with the control groups, the observation group showed a statistically significant decrease in red blood cells (RBC), hemoglobin (Hb), and hematocrit (HCT) levels, and an increase in monocytes (MONO) and platelet (PLT) counts, all showed statistically significant differences (P<0.0001). The proportion of fibrinogen degradation product (FDP) and D-Dimer of observation group exceeding the range increased significantly. Compared with the three control groups, the number of outpatient fibrinogen degradation products (FDP) in the observation group of patients aged 50 years and verage number of patients under 50 years old in the observation group with D-Dimer exceeding the threshold increased by more than 48.98%, and the monthly average number of patients with D-Dimer exceeding the threshold in patients aged 50 or older increased by 346%-998%. Conclusions The results of this study suggest that outpatient patients with mild or regular SARS-CoV-2 infection are also at risk for thrombotic events, and monitoring blood coagulation indicators such as D-dimer is recommended to avoid the sudden onset of thrombosis-related fatal complications .

Objective To research the efficiency of interactive teaching combined with group discussion in prosthodontics course. Methods Totally 40 stomatology students of 2009 grade were divid-ed into 2 groups by stratified random sampling , 6 males and 14 females in each group. Students in con-trol group were taught by traditional teaching method while those in the test group were taught by interac-tive teaching method during prosthodontics course. Knowledge lectures and cases discussion in interactive teaching method were distributed as ratio of 3∶1 in class time , and network interactive teaching was car-ried out after class. Exam was taken after the course, which included single choices(80 questions, 80 points), true or false questions(20 questions, 20 points) and case analysis(5 questions, 50 points). Full marks of the exam was 150 points and exam time was 150min. Then questionnaire survey was carried out, which included the students' interest in learning and cognition of learning difficulty. Exam scores were statistically analyzed by two sample t-test(α=0.05) and the questionnaire survey results were statistically analyzed by Mann-Whitney U test(α=0.05). Results Average scores were(109.22±8.22) in control group and(126.28±8.72) in test group, with statistical differences(F=1.1254, P=0.000). There were statistical differences between control group and test group in studying interest(Z=-2.869, P=0.004) and difficulty(Z=-2.711, P=0.007). Conclusions Initiative, thinking capacity and scores can be enhance by interactive teaching method which is more efficiently than traditional teaching method.

OBJECTIVETo observe the expression of phospholipid scramblase 1 (PLSCR1) in matrine (MAT) induced differentiation of all-trans retinoic acid (ATRA) resistant acute promyelocytic leukemia (APL) cells, and to explore its correlation to cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA) signal pathway.

METHODSNB4 (an APL cell line sensitive to ATRA) and NB4-R1 (a resistant strain of ATRA) were observed as subjects in this study. Effects of combined treatment of 0.1 mmol/L MAT and 1 [mol/L ATRA on the differentiation of two cell lines were detected using nitroblue tetrazolium (NBT) reduction test and flow cytometry (CD11b). Expressions of PML/RARot and PLSCR1 protein/gene were detected using Western blot and Real-time fluorescence quantitative PCR assay. Meanwhile, H89, PKA antagonist, was used to observe cell differentiation antigen and changes of aforesaid proteins and genes.

RESULTSMAT combined ATRA could significantly elevate positive rates of NBT and CD11 b in NB4-R1 cells, and significantly down-regulate the expression of PML/RARapha-fusion protein/gene (P < 0.05, P < 0.01). ATRA used alone could obviously enhance the expression of PLSCRI in NB4 cells at protein and mRNA levels (P < 0.01). But the expression of PLSCR1 was up-regulated in NB4-R1 cells, but with statistical.difference only at the protein level (P <0. 01). In combination of MAT, PLSCR1 protein expression was further elevated in the two cell lines (P < 0.01). Besides, there was statistical difference in mRNA expressions in NB4-R1 cells (P < 0.05). All these actions could be reversed by treatment of 10 micromol/L H89 (P < 0.05, P < 0.01).

CONCLUSIONMAT combined ATRA could significantly induce the differentiation of NB4-R1 cells, and inhibit the expression of PML/RARalpha fusion gene/protein, which might be associated with up-regulating PLSCR1 expression.

Alkaloids ; Antineoplastic Agents ; Cell Differentiation ; Cell Line, Tumor ; Down-Regulation ; Humans ; Leukemia, Promyelocytic, Acute ; metabolism ; Phospholipid Transfer Proteins ; metabolism ; Quinolizines ; RNA, Messenger ; Signal Transduction ; Tretinoin ; Tumor Cells, Cultured ; Up-Regulation

Objectiv e:To investigate the effect of different culture conditions on the differentiation of Treg and Th17 to lay a foundation for exploring the methods to reverse the immune tolerance induced by tumor microenvironment.Methods:The IL-6 gene was cloned and stablely transferred into the tumor cell line expressing TGF-β.The conditioned mediums ( CM) were prepared by collecting the culture supernatants of tumor cell lines with or without IL-6 expression and used in the in vitro culture of peripheral blood mononuclear cells ( PBMC ) .The changes of Treg and Th17 in PBMC treated with different CM were detected with flow cytometry ( FCM) .Results:The expression of TGF-βin BEL-7402 was higher than that in HepG2.Thus the BEL-7402 was selected for preparation of cell line stablely transfected with IL -6 gene.ELISA detection confirmed the effective expression of IL -6 by the identified cell lines.It was showed that the Treg increased in PBMC treated with culture supernatants of tumor cells .However,the presence of IL-6 reversed the increase of Treg and promoted the differentiation of Th 17.Conclusion: The culture supernatants of tumor cells increases the proportion of Treg.However,the presence of IL-6 in this CM can reverse the increase of Treg and raise the proportion of Th 17.

OBJECTIVE:To provide reference for investigating the nutrition situation of the inpatients in departments of spinal surgery and minimally invasive spinal surgery and promoting the clinical rational use of nutritional support drugs. METHODS:Des-ignated continuous sampling was used to select the inpatients that fit the conditions in the departments of spinal surgery and mini-mally invasive spinal surgery in our hospital from Jan. to Dec. 2013,and the nutritional risk screening 2002 was used to investigate the patients’nutritional risk at admission and upon discharge,the nutritional support during hospitalization were recorded. RE-SULTS:In the 432 enrolled patients,the overall incidence of nutritional risk was 11.57% at admission,12.40% in spinal surgery and 10.44% in minimally invasive spinal surgery;and the overall incidence of nutritional risk was 19.44% upon discharge, 23.60% in spinal surgery,with statistical significance when compared with admission(P<0.05),while 13.74% in minimally inva-sive spinal surgery,with no statistical significance when compared with admission(P>0.05). The nutritional support rate of 50 pa-tients with nutritional risk at admission was 88.00%,14.14% of 382 non-risk patients still received a redundant nutritional support. The 44 patients with nutritional risk who received nutritional support had the average calories intake of(9.84±8.10)kJ/(kg·d),in-cluding 10.16% lipids and 9.55% protein;all patients who received nutritional support found no patients with enteral nutrition sup-port. CONCLUSIONS:Inpatients in departments of spinal surgery and minimally invasive spinal surgery suffer a lower incidence of nutritional risk at admission,and a higher incidence of nutritional risk in the former one upon discharge. While some patients who received nutritional support show no indication,and administrations of nutritional support are still debatable,the use of drug is irrational.

Objective To analyze the characteristics of the genotype, phenotype, and follow-up of Gitelman's syndrome (GS) in the largest group of Chinese patients. Methods Sixty seven patients with GS underwent SLC12A3 gene analysis. Clinical characteristics and biochemical findings at the first presentation as well as follow-up were reviewed. Additionally, the associations of genotypes and phenotypes were explored. Results Forty-one different SLC12A3 mutations were identified in 67 patients with GS, including 11 novel ones, and 5 recurrent ones. 3 families (5. 7% ) had triple SLC12A3 mutations. Typical hypocalciuria and hypomagnesemia were not found in 6(9% ) and 8 (11. 9% )patients, respectively. In addition, male patients had an earlier age of onset and a higher urinary fraction excretion of electrolytes. 2 patients presented with chronic kidney disease, 13 (19. 4% ) with type 2 diabetes, 14 (20. 9% )with impaired glucose tolerance, and 5(7. 5% ) with impaired fasting glucose. Conclusion This study revealed 41 mutations in 67 Chinese patients with GS, including 11 novel variants and 5 high-frequency ones. Fraction excretion of electrolyte in urine may be more sensitive in the evaluation of phenotype compared with those of blood. It is difficult to correct hypokalemia and hypomagnesemia in GS. Patients with GS are at higher risk of the development of diabetes than ordinary people.

Bronchi ; Child, Preschool ; Diagnostic Errors ; Foreign Bodies ; diagnosis ; Humans ; Lung Diseases ; congenital ; diagnosis ; Male