Aim To investigate the effects of T-and L-type calcium channel blockers on isolated thoracic aorta from thyroxine-induced hypertensive rats.Methods Hyperthyroidism was induced by administering L-thyroxine (T4,0.5 mg·kg~(-1),sc) daily for 16 days.Sham-treated euthyroid control rats were only received vehicle saline for 16 days. Experiments were performed in isolated thoracic aorta rings from euthyroid and hyperthyroid rats. Mibefradil and diltiazem were used to inhibit T-and L-type calcium channels,respectively.Results Thyroid hormone excess for 16 days induced characteristic changes in body weight,heart rate and systolic blood pressure in rats. The body weight was significantly decreased,heart rate and systolic blood pressure were increased in T4-treated rats. Thoracic aorta morphology was altered in T4-treated rats. The thickness of adventitia was increased with hypertrophy and hyperplasia of the smooth musle cells in T4-treated rats. Vasorelaxant effect of T-and L-type calcium channel blockers were accentuated in aortic rings from T4-treated rats.Conclusion These data suggest that T-and L-type calcium channels are functionally upregulated in isolated thoracic aorta from hyperthyroid rats and they,may be a therapeutic target in thyroxine-induced hypertension.

This paper summarize the practice in the teaching reform of microbiology experiment in recent years. We identify the main contents of experimental teaching systems and pay much more attention to peo-ple-oriented. Through the reform of teaching and assessment methods,students are trained to cultivate their practical ability and spirit of innovation.

Air Pollutants, Occupational ; analysis ; Dust ; analysis ; Germany ; Workplace

Objective To explore the enhancement effects and mechanisms of IL-32β on human cervical carcinoma cells C33A to hypoxic/hypoglycemic condition.Methods After cultured in hypoxia/hypoglycemic circumstance and normal circumstance for 20 hours respectively, the mRNA and protein expression of IL-32β in C33A cells were detected by real time-polymerase chain reaction (RT-PCR) and Western blotting respectively.Trypan blue stain was used to detect C33A cells viability in hypoxia/hypoglycemic circumstance and adding 10, 100,500 ng/ml IL-32β circumstance.The xenografted tumor of nude mice was established by intraperitoneal injection, and their volumes were tested for a given time after injecting 0, 1.0 mg/kg IL-32β.siRNA was used to construct IL-32β knockdown cells and detect the expression of VEGF.Results Under the hypoxia/hypoglycemic circumstance, the expressions of IL-32β mRNA were (6.12 ± 0.03) times of the normal circumstance (F =43.16, P ＜ 0.05), the expressions of IL-32β protein were (2.23 ± 0.04) times of the normal circumstance (F =22.32, P ＜ 0.05).The C33A cells viability in hypoxia/hypoglycemic circumstance was (51.92 ± 3.41) ％, whereas, viability in 10 ng/ml IL-32β group was (55.23 ± 3.92) ％ (F =14.25, P ＜ 0.05), viability in 100 ng/ml IL-32β group was (62.52 ± 4.14) ％ (F =35.53, P ＜ 0.01), viability in 500 ng/ml IL-32β group was (69.14 ± 2.45) ％ (F =56.28, P ＜ 0.01).After 28 days, the volume of xenografted tumor of 0 mg/kg IL-32β group was (578 ± 64)mm3, and 1.0 mg/kg IL-32β group up to (1 402 ± 142) mm3 (F =27.84, P ＜ 0.01).In addition, compared with control group, the expression of VEGF in IL-32β knockdown C33A cells was significantly decreased (F =36.85, P ＜ 0.05).Conclusion IL-32β can enhance the resistance to hypoxic/hypoglycemic condition of C33A cells, which is associated with the increase of VEGF.

ObjectiveTo investigate the clinical features and risk factors of patient with Wegener's granulomatosis complicated with pulmonary infection.Methods Patients with Wegener's granulomatosis admitted to our hospital in the past 11 years were retrospectively analyzed.Comparisons between groups were performed by t tests or Fisher test.ResultsPulmonary infection occurred in 27 cases with an incidence rate of 29％.Twenty-six percent of pulmonary infections occurred at the initial diagnosis,and 44％ occurred within 6 months,while 30％ occurred later than 6 months.The clinical manifestations of pulmonary infection were productive cough (89％),hemoptysis (63％),fever and fatigue (56％),chest pain and pactoralgia (33％).The most common causative pathogen were bacteria(59％ ),fungi(37％ ),and tubercle bacillus(37％ ).Sinus infection(P=0.01),hypoproteinemia(P=0.03),hypoimmunoglobulinemia (P=0.007),and methylprednisolone pulse therapy(P=0.002) were the risk factors for pulmonary infection.ConclusionThe occurrence of Wegener's granulomatosis complicated with pulmonary infection is high within 6 months.The most common clinical manifestation is productive cough.The most common causative pathogens are bacteria,tubercle bacillus and fungi.Sinus infection,hypoproteinemia,hypoimmunoglobulinemia,and methylprednisolone pulse therapy are risk factors of pulmonary infection.

Mycoepoxydiene is a novel antitumor agent extracted from marine lignicolous fungi HLY-2, which is Diaporthe phaseolorum by molecule identification. The medium optimization for mycoepoxydiene by orthogonal design and the comparison of submerged fermentation and solid state fermentation were studied. The rusult is that the maximal yield of the compound is 543mg/L, which is 43 times compared to the customary half-seawater PD medium and 15 times to the best submerged condition. This optimum culture medium included potato 250g/L, seawater 300mL/L, glucose 30g/L, lactose 50g/L, KH_ 2 PO_ 4 0.65mmol/L and (NH_ 4 )_ 2 SO_ 4 1g/L in the solid state condition. Differentiation analysis between submerged and solid state fermentation, and antitumor activity of these ferment products were also studied. The antitumor activity of products of the optimum medium approached the pure compound.

In this study, plate transparent circle by Davis method was introduce firstly screening ?-Rhamnosidase high-yield strain. The spore-sprouted Aspergillus niger 8-hour were mutagenized by ethyl methane sulphonate and pre-screened via transparent circle. 11% mutants yield 40% higher of ?-rhamnosidase than the original strain. A high-yield strain, T-226 with the highest ?-rhamnosidase activity of 373.4 U/mL was finally selected from these potential high-yield mutants after rescreened by shake flask fermentation twice. When the T-226 strain was fermented in 5 L bioreactor, the enzyme activity could reach to 631.9 U/mL after 84 h. Thus, the established screening method is highly efficient to isolate ?-rhamnosidase high-yield mutant of A. niger.

Objective To evaluate the effect of Parkinson's disease treatment guideline on the initial medicine therapy and to explore the impact of hospital grade level and type of insurance on the initial prescription for Parkinson's disease.Methods We identified 136 PD patients as part of a population-based study in Beijing and made a comparison between the patients with initial prescriptions of dopamine receptor agonists (DA) and levodopa (LD).Results Among 136 patients,excluding patients without initial medication of levodopa or dopamine receptor agonist,there were 61 cases with initial drug administration aged ≥ 65 years.Among the 61 cases,1 cases and 19 cases administrated dopamine receptor agonist and levodopa respectively before 2006,1 case and 11 cases respectively from 2007 to 2009,and 5 cases and 24 cases respectively after 2010.There was no significant difference in the percentage between patients with initial administration of levodopa and dopamine receptor agonist in the three periods (x2 =1.891,P =0.388).In 41 patients with initial drug administration of dopamine receptor agonist or levodopa aged＜65 years,1 cases and 23 cases administrated dopamine receptor agonist or levodopa respectively before 2006,0 case and 10 cases respectively from 2007 to 2009,and 3 cases and 4 cases respectively after 2010.There was significant differences in the percentage between patients with initial administration of levodopa and dopamine receptor agonist in the three periods (x2 =10.644,P=0.005).The percentage of patients with initial administration of dopamine receptor agonist aged＜65 years was increased after 2010 as compared before 2006 (x2 =7.219,P=0.028).There were no significant differences in the percentage of patients with initial administration of dopamine receptor agonist between grade 3 and non-grade 3 hospitals (13.6％ vs.6.3％,x2=0.675,P=0.686)and between patients with and without insurance (13.1％ vs.10.0％,x2=0.141,P=1.000).Conclusions The percentage of patients with initial administration of levodopa and dopamine receptor agonist has no significant difference between patients with initial drug administration aged ≥ 65 years before and after the introduction of Parkinson's disease treatment guideline,while the percentage is increased in patients with initial drug administration aged＜65 years.No impact of hospital grade level and type of insurance on initial administration for Parkinson's disease is found.

Objective To investigate the expression level of adenosine 2A receptors in peripheral blood lymphocytes and the correlation with disease progression of Parkinson's disease (PD).Methods In this retrospcctive study,out patients with PD(42 cases)and healthy controls(32 cases) were recruited at Beijing Hospital.The expression level of A2A receptors in peripheral blood lymphocytes was detected by flow cytometry.The concentration of free A2A receptors in plasma was detected by enzyme linked immunosorbent assay (ELISA).The expression of A2A receptors and plasma free A2A receptors in peripheral blood lymphocytes of the PD group and the control group was compared.Multivariate regression analysis and single factor correlation analysis were performed on sex,age,course of disease,duration of medication,drug type and dose,motor complications,and PD unified Parkinson's disease rating scale (UPDRS)score.Results A2A receptor expression in lymphocytes was significantly higher in the PD group than in the control group (8.96 ± 4.73)％ vs.(5.39±2.42)％ (t=4.210,P＜0.05).There was no significant difference in A2A receptor concentrations in plasma between the two groups (1.82 ± 1.91) μg/L vs.(1.15 ± 0.71) μg/L(t=1.078,P＞0.05).In the PD group,A2A receptor expression in lymphocytes in patients with motor complications was statistically lower than in patients without them (P＜ 0.05).Lymphocyte A2A receptor levels in the 5-9 years duration subgroup were significantly lower than those in the ＜5 years duration subgroup (Z=2.780,P＜0.01) and the≥10 years duration subgroup (Z=-2.149,P＜0.05).Conclusions The expression of A2A receptors in peripheral blood lymphocytes is correlated with PD.The expression of A2 A receptors in peripheral blood lymphocytes of patients with PD fluctuates with the occurrence of motor complications and the progression of disease.Further research is needed to establish A2A receptors as a biomarker for monitoring disease progression.

Objective To investigate the prevalence of Helicobacter pylori (HP) infection in patients with Parkinson's disease (PD), and analyze the relationship of HP infection with the symptoms, disease progression and motor complications of PD.Methods 72 PD outpatients were randomly selected, and 100 gender and age-matched subjects who took health physical examination were considered as healthy controls.Basic data were collected and estimated by Unified Parkinson's Disease Rating Scale (UPDRS), Hoehn and Yahr stage, the 39-item Parkinson' s Disease Questionnaire (PDQ-39), Activity of Daily Living Scale (ADL), Minimum Mental State Examination (MMSE), Hamilton Depression Scale (HAMD), Hamilton Anxiety Scale (HAMA).All subjects underwent 13C-urea breath test to determine Helicobacter pylori infection status.Results There was no significant difference in H P infection rate between PD and control groups [37.5 ％ (27 cases)vs.32.0％ (32 cases), P=0.45].According to the initial symptoms, PD patients were divided into two groups: bradykinesia/ rigidity group and tremor group.The HP infection rate was higher in bradykinesia/rigidity group than in tremor group [52.2％ (12 cases) vs.30.6％ (15 cases)], but had no significant difference (P=0.08).The mean HY stage was higher in the HP-infected patient group than in the non-infected group [(2.6±0.7) vs.(2.2±0.9), P=0.03].The HP infection rate was higher in patients with HY stage ≥2 than with HY stage ＜2 [46.4％ (26 cases) vs.6.3％ (1 case),P=0.003].There were no correlations of HP infection with gender, age, age of onset, UPDRS, UPDRS-Ⅲ, PDQ-39, the course of the disease, wearing-off phenomenon, and dyskinesias.Conclusions The PD patients with HP infection are mainly at middle-and late-stage.HP infection may be related with the progress of the disease.It needs further study and validation by expanding the sample to investigate whether HP infection affects the motor complications.