Objective　To investigate the effects of a wide range of concentrations of As2O3 malignant lymphoma cell lines. Methods　Cell apoptosis situation ,cellular DNA contents and bcl-2 protein expression were determined by cell stain, TdT-mediated dUTP Nick-end Labeling (TUNEL) and flow cytometry. Results　0.5 μmol/L～2.0 μmol/L As2O3 could inhibit Raji cell growth accompanied by the appearance of morphologic characteristics of apoptosis. Number of sub-G1 cells significantly increased and bcl-2 protein expression in Raji cells was significantly down-regulated assayed by flow cytometry. The relationship between bcl-2 protein and the concentrations of As2O3 showed a dose-and time-dependent effect; so did the number of sub-G1 cells. However, there was no effect of 0.5 μmol/L～4.0 μmol/L As2O3 on Jurkat cell.Conclusion　It is found that As2O3 could significantly inhibit the growth of B lymphoma cell lines and induce their apoptosis.

Objective To investigate the expression changes of aquaporin-1 (AQP1) and aquaporin-9 (AQP9) in rats after traumatic brain injury, and explore the roles of AQP1 and AQP9 in the development of brain edema.Methods In an impact-acceleration head injury model of rat, brain water content was measured by wet-dry weight method at 1 h, 6 h, 24 h, 48 h and 168 h after brain trauma. The expressions of AQP1 and AQP9 in brains were investigated by immunohistochemistry and Western blot.Results Brain water content increased in the injuried brain tissues after 1 h post-injury, reached peak at 24 h and returned at 168 h. Both expressions of AQP1 and AQP9 were induced in reactive astrocytes adjacent to injury sit at 6 h and 24 h after brain trauma. Staining of AQP1 in the endothelial cells was not present in normal rat brains but appeared strong after brain trauma.Conclusion A remarkable induction expression of AQP1 or AQP9 after brain trauma may participate in the development of brain edema.

Abstract: Objective To collect the cases of laboratory-acquired infections (LAI) reported in literatures in China, summarize the infection routes and causes of LAI in China, in order to improve laboratory staff's understanding of its occupational health and safety risks. Methods　The cases of laboratory-acquired infection reported in domestic literatures were collected from PubMed, CNKI, Wanfang Database, CBM China Biomedical Literature Database up to April 11, 2022, retrospectively analyze the number and causes of LAI reports, the main risk factors of LAI and its harm to society, the consequences of LAI or the leakage of pathogenic microorganisms, and put forward the relevant countermeasures of biological safety. Results　A total of 22 LAI reports were collected, reviewed and integrated into 21 reports. There were 7 kinds of pathogenic microorganisms. The main pathogenic microorganisms were hantavirus (42.86%, n=9) and Brucella (33.33%, n=7). There were 122 cases and 3 deaths in the laboratory. Most of the reports came from research laboratories (66.67%, n=14). The main route of infection was inhalation of aerosol (42.86%, n=9), followed by transdermal route (38.09%, n=8). Conclusions Failure to report LAI events will increase the risk of pathogenic microorganisms spreading to people outside the laboratory and the environment through infected laboratory staff. Local health institutions and laboratories should be encouraged to report LAI cases as a powerful tool for monitoring accidental leakage of pathogenic microorganisms and further improving laboratory biosafety. The laboratory needs strong biosafety measures to protect staff's health and prevent environmental pollution caused by accidental leakage of pathogenic microorganisms.

Asian Continental Ancestry Group ; Humans ; Language ; Medicine, Chinese Traditional ; Translations

Aging ; psychology ; Animals ; Drugs, Chinese Herbal ; pharmacology ; Learning ; drug effects ; Male ; Memory ; drug effects ; Rats ; Rats, Wistar

BACKGROUND: As the damage caused by protein glycation is one of the mechanisms of diabetes, it is helpful to treat diabetes related diseases with the understanding of the inhibition of berberine on protein glycation and the protection to the brain damage caused by protein glycation.OBJECTIVE: To observe the effects of berberine on glycated brain damages induced by D-galactose in model rats.DESIGN: Randomly grouping paralleled control study.SETTING: Department of Ophthalmology, Xiamen Traditional Chinese Medicine Hospital.MATERIALS: The experiment was conducted in the Department of Pharmacology, Pharmacy College of Jinan University from June to October 2005. Ninety SD rats (6 weeks old) were selected and divided into 6 groups: control group, model group, hydrochloride aminoguanidine group and high (300 mg/kg), middle (150 mg/kg) and low (75 mg/kg) doses berberine groups with 15 rats in each group. The glycated models were established by intraperitoneal injection of D-galactose. The main drugs:berberine was from Guangzhou Wanji Drugs Limited Company; D-galactose was from Shanghai Yuanju Bioscience Technology Limited Company.METHODS: The rats in the control group were intraperitoneally injected the normal saline for 8 weeks; rats in other groups were injected 5%D-galactose (150 mg/kg) for 8 weeks. From the 3rd week, the hydrochloride aminoguanidine group was infused hydrochloride aminoganidine (150 mg/kg); the three doses berberine groups were given corresponding doses berberine; the control group and model group were given distilled water for 6 weeks with the volume of 10 mL/kg. At the end of the 8th week, the erythrocyte aldose reductase activity was determined by coomassie brilliant blue method; the level of plasma glycohemoglobin was measured by thio-barbituric acid colorimetry and the fructosamine in serum was measured by nitroblue tetrazolium colorimetry. The quantity of advanced glycation end products (AGEs) in serum, and AGEs, malondialdehyde (MDA), and activity of superoxide edismutase (SOD) in brain tissue and calcium ion in neurons were also dertermined. Moreover, the changes of mitochondria in brain hippocampus cells were observed under electronic microscope.MAIN OUTCOME MEASURES: ① The AGEs, plasma glycohemoglobin, serum fructosamine and aldose reductase activity. ②AGEs in brain tissues. ③Calcium level in brain. ④MDA content and SOD activity in brain tissues. ⑤Changes of mitochondria in hippocampus neurons.RESULTS: All 90 animals were involved in the result analysis. ①Aldose reductase activity and glycated product content in serum: After the rats were treated with D-galactose for 8 weeks, the aldose reductase activity in red blood cells and the content of fructosamine in serum, glycohemoglobin,AGEs in the model group were significantly higher than those in the normal control group (P ＜ 0.01); After treated by high and middle doses berberine for 6 weeks, the activity of aldose reductase and content of fructosamine in serum (absorbancevalue of hemoglobin every 10 g), glycohemoglobin, and AGEs were obviously lower than those in the control group [(1.07±0.39), (1.22±0.47), (1.76±0.30) nkat/g, t=5.052, 5.484, P ＜ 0.01;(0.740±0.142), (0.862±0.131), (0.958±0.083) mmol/L, t=7.829, P ＜ 0.01,t=2.404, P ＜ 0.05; 58.434±12.135, 64.614±13.418, 83.747±7.990,t=4.922, 6.748, P ＜ 0.01; (3.104±0.814), (2.937±0.514), (4.156±0.860) U/mg,t=4.104, 3.440, P ＜ 0.05]; the aldose reductase activity of the low dose berberine group was lower than the model group (P ＜ 0.05), which had no obvious effect on glycated products. ②AGEs in brain tissues: The contents in the hydrochloride aminoganidine group, high and middle doses berberine groups were lower than the model group [(10.52±1.22), (10.95±1.75),(11.95±2.27), (14.26±3.51) U/mg, t=-3.892, -3.263, P ＜ 0.01, t=-2.139,P ＜ 0.05], and the low dose berberine had little effect (P ＞ 0.05). ③Calcium level in neurons: The levels in the hydrochloride aminoganidine group,and high dose berberine groups were lower than the model group.[(271.52±32.71), (293.84±31.58), (337.15±58.49) nmol/L, t=-3.421, P＜ 0.01, t=-2.275, P ＜ 0.05], the low dose berberine group had no obvious effect (P ＞ 0.05). ④MDA content and SOD activity in brain tissues: MDA contents in the hydrochloride aminoganidine group, high and middle doses berberine groups were lower than the model group, and the SOD activity was markedly higher than the model group [(2.09±0.16), (2.12±0.22),(2.41±0.12), (2.54±0.21) μmol/g, t=6.601, 5.348, P ＜ 0.01, t=2.082, P＜ 0.05; (8.79±1.09), (8.80±1.52), (7.90±1.48), (6.48±1.34) mkat/g, t=4.571,4.254, P ＜ 0.01, t=2.226, P ＜ 0.05]. ⑤Mitochondria structure in brain hippocampus cells: Under the electronic microscope, mitochondria in brain hippocampus cells of the model group appeared obvious swelling with broken crests and disorganized structure, even obvious big vacuoles were observed. In the hydrochloride aminoganidine, and high and middle doses berberine groups, no obvious swelling was observed with vacuoles only in a few mitochondria. Nevertheless, obvious swelling appeared in mitochondria of low dose berberine group with broken crest and disorganized structure,and vacuoles were observed.CONCLUSION: D-galactose-induced damage in mitochondria may be related to AGEs formation in brain tissue, maladjustment of calcium ions in neurons and oxidative stress in rat models. Berberine can inhibit glycation induced by D-galactose and protect rat brain tissues from glycated damage.

ObjectiveTo evaluate the efficacy of modified ultrafiltration (MUF) combined with conventional ultrafiltration (CUF) for cardiac valve replacement in patients with severe valve disease.MethodsOne hundred and eight NYHA Ⅲ or Ⅳ patients with severe valve disease,aged≥ 18 yr,weighing 50-80 kg,scheduled for elective cardiac valve replacement under cardiopulmonary bypass (CPB) were randomized into CUF group ( n =56) and CUF combined with MUF group (CMUF group,n =52).MUF was performed at the end of CPB,and the flow and time was 400 ml/min and 15-20 min respectively.Arterial blood samples were taken for blood gas analysis and for measurement of the plasma IL-6 and IL-8 concentrations after induction of anesthesia (T1),at the beginning of CUF (T2),at the end of GUF (T3),at the beginning of MUF (T4),at the end of MUF (T5),and at 2,8 and 24 h after the termination of CPB (T5-8).The oxygenation index was calculated and the airway pressure was recorded at T5 8.The amount of urine output during operation,the amount of urine output and volume of chest tube drainage within 24 h after operation,extubation time,packed red blood cell (PRBC) transfusion and duration of stay in ICU were recorded.ResultsCompared with CUF group,the hematocrit at T5,6 and oxygenation index at T7,8 were significantly increased,extuhation time was significantly shortened,and the amount of urine output and volume of chest tube drainage within 24 h after operation and PRBC transfusion were significantly reduced ( P ＜0.05),and no significant change was found in the plasma IL-6 and IL-8 concentrations,airway pressurc,amount of urine output during operation,and the duration of stay in ICU in group CMUF ( P ＞ 0.05).ConclusionCombination of MUF and CUF during CPB can be used for cardiac valve replacement in patients with severe valve disease,improve the function of organs after operation and reduce homologous blood transfusion.

Objective:To evaluate the effect of passive smoking on the incidence of children's asthma in our country and abroad.Methods: Based on the 3 Chinese major science literature databases and MEDLINE database,8 articles were selected among all the articles of case control study during 1994 to 2003.The results of 8 Logistic regression on the cause of children's asthma were analyzed by General Variance Based method of meta analysis. Results: The pools regression coefficient b G was 1.101,OR was 3.007, ? 2 was 22.49 ( P

Many investigations showed that abnormal blood insulin level is associated with the pathogenesis of Alzheimer′s disease and its clinical manifestation, suggesting that increasing blood insulin level and/or improving insulin sensitivity seem to be helpful for patients with Alzheimer′s disease.

Objective A biomechanical comparison of three kinds of internal fixation for intercondylar fracture of humerus was, made so as to provide a theoretical basis for clinical practice. Methods 18 fresh humeri were used to reproduce T-type intercondylar fracture, and three different fixation appliances were applied, including cross Kirschner wire with addition of “8” wire, single “Y” type plate, 1/3 tubular plate with reconstruction plate. Biomechanical tests were performed on these specimens. Result Under the same load condition, 1/3 tubular plate with reconstruction plate yielded the best results, while crossing Kirschner wire with “8” wire was the poorest. Conclusion The results showed that 1/3 tubular plate with reconstruction plate was a good internal fixation appliance. It has a proper design and stability, but it is not easy to apply. Therefore, an optimal method should be chosen according to local condition in clinical practice.