AIM: To study the effects of As_2O_3 on the growth of human cervical carcinoma cell line, HeLa cells, human pancreatic carcinoma cell line, AsPC-1 cells, and the generation of reactive oxygen species (ROS) in the cells. METHODS: HeLa cells and AsPC-1 cells were treated with various concentrations of As_2O_3. The effects of As_2O_3 on HeLa cells and AsPC-1 cells survival and apoptosis were determined by MTT assay and light microscope, and cellular ROS was also measured by fluorometer. RESULTS: After being treated with 2 ?mol/L As_2O_3 for 48 h, the survival of HeLa cells was decreased, a marked apoptosis characteristic was observed in time- and dose-dependent manner. However, the survival of AsPC-1 cells markedly decreased after being treated with even 1?mol/L As_2O_3 for 24 h. When we measured the cellular hydrogen peroxide (H_2O_2) level, we found that the H_2O_2 level in HeLa cells started to rise after being incubated with As_2O_3 for 2 h, and sustained increased, reached the peak of H_2O_2 level at 8 h, then it began to decrease. While the H_2O_2 level in AsPC-1 cells started to rise at 2 h, reached the highest point at 5 h, after which it began to descend. At 12 h, the H_2O_2 level in HeLa cells and AsPC-1 cells were similar to that of the control group. CONCLUSION: The molecular mechanisms underlying As_2O_3 -induced apoptosis in cells derived from the solid tumors may be related to the cellular ROS level.

Objective To investigate medical staff’s cognizance, response, and emotion changes when confronting a sudden public health accident. Methods The self-designed psychological questionnaire was used to investigate 138 medical staff’s psychological condition in a general hospital. Results When sudden public health accidents came, the medical staff’s positive cognizance, positive and negative response, and positive emotion exhibited significant difference according to which wards they worked in and what professional background they possessed(P

Objective To explore the influencing factors of hypotension in hemodialysis patients with end stage of diabetic nephropathy.Methods 106 patients of advanced diabetic nephropathy who received maintenance hemodialysis were selected in the present study.According to the patients'condition needs, chose different dialysis modes,dialyzers, dialysis blood flow and ultrafiltration rate, compared the frequency of occurrence of hypotension during treatment.Results By multivariate regression analysis,gender,dialysis mode,dialysis and blood flow had no correlation with hypotension during dialysis.The age, hemoglobin, serum albumin, cardiac function and individual ultrafiltration rate were correlated with the incidence of hypotension in patients with diabetic nephropathy.Individual-ized ultrafiltration rate was less than or equal to 10 mL · kg-1 · min-1 and individual ultrafiltration rate was up to 10 mL· kg-1 · min-1 ,the incidence rates of hypotension were 18.9% and 25.9%,the difference was statistically significant (χ2 =7.102,P<0.05).Conclusion Diabetic nephropathy patients during dialysis,ultrafiltration rate control individuals can effectively reduce the frequency of occurrence of hypotension during dialysis, hemodialysis patients may improve tolerability.

Objective To establish renal calculus rat model induced by calcifying nanoparticles .Methods We extracted and cultivated calcifying nanoparticles from clinically diagnosed patients with nephrolithiasis .Forty adult male SD rats were divided into 4 groups (n=10 each):group A(given an intravenous injection of calcifying nanoparticles) ,group B(given an intravenous injection of calcifying nanoparticles and taken Shenshitong granules) ,group C(given an intravenous injection of calcifying nanoparticles and intraperitoneal injection of gallium nitrate) ,group D (as normal control) .Eight weeks later ,all rats were sacrificed .The kidneys were examined for pathology .Results Histopathological studies revealed calcifying nanoparticles induced renal tubular epithelial cells fatty degeneration and renal tubular crystallization ,and caused renal interstitial infiltration with inflammatory cells .The forma‐tion of renal crystals in group A was more obvious than those in group B and C(P<0 .05) .In group D ,no crystals were formed and no pathological changes occurred .The levels of urinary calcium and urinary creatinine(of All group) at one day before the observa‐tion period (T2 ) were higher than those at 4 weeks after injection(T1 )(P<0 .01) .The levels of urinary calcium and serum creati‐nine in group A and B and C were significantly higher than those in group D at T2 (P<0 .05) .The levels of urinary calcium in group B and C were lower than that in group A at T2 (P<0 .05) .However ,there were no apparent differences of the levels of serum calci‐um and urinary creatinine between groups at T2 (P>0 .05) .Conclusion Calcifying nanoparticles could cause renal tubular epithelial cells injury ,which leads to the formation of kidney stones .

Adolescent ; Adult ; Case-Control Studies ; Female ; Humans ; Lymphoma, Non-Hodgkin ; blood ; diagnosis ; pathology ; Male ; Middle Aged ; Neoplasm Staging ; Prognosis ; Receptors, Urokinase Plasminogen Activator ; blood ; Young Adult

OBJECTIVETo compare the efficacy difference among acupuncture smoothing-liver and regulating-spleen method, regulating Governor Vessel method and oral administration of western medicine for menopausal insomnia.

METHODSOne hundred and fifty-six cases of menopausal insomnia were randomized into a smoothing-liver and regulating-spleen group (group A), a regulating Governor Vessel group (group B) and a medication group (group C), 52 cases in each one. Acupuncture at Zhongwan (CV 12), Daheng (SP 15), Sanyinjiao (SP 6) and Taichong (LR 3), etc. was applied in the group A; acupuncture at Baihui (GV 20), Fengfu (GV 16), Shenting (GV 24) and Yintang (GV 29), etc. was used in the group B; oral administration of estazolam tablets (1 mg each-day) was adapted in the group C, all once a day for totally 30 days. The each item score and total score in Pittsburgh sleep quality index (PSQI) were evaluated before and after treatment in each group, also the efficacy in each group was assessed.

RESULTSAfter the treatment, the sleeping rate in the group A and B was significantly higher than that in the group C (both P < 0.05); the total effective rate in the Group A and B was also significantly higher than that in the group C [86.5% (45/52) and 82.7% (43/52) vs 63.5% (33/52), both P < 0.05; the total cured rate in the group A was significantly higher than those in the group B and C [48.1% (25/52) vs 23.1% (12/52) and 25.0% (13/52), both P < 0.05]. Each item score and total score of PSQI were all improved after treatment in the group A and B (P < 0.01, P < 0.05), while only sleeping time, sleeping efficiency and total score were improved in the group C (all P < 0.05). The sleeping quality, sleeping time, sleeping difficulty and daytime dysfunction in the group A were all lower than those in the group C (all P < 0.05). The sleeping quality, sleeping time and daytime dysfunction in the goup B were all lower than those in the group C (all P < 0.05). The total score in the group A was significantly lower than that in the group B and C (both P < 05).

CONCLUSIONAcupuncture has better effect for menopausal insomnia than estazolam. Between the two acupuncture methods, the acupuncture method of smoothing-liver and regulating-spleen has a better effect.

Acupuncture Therapy ; Female ; Humans ; Liver ; physiopathology ; Menopause ; physiology ; Meridians ; Middle Aged ; Sleep Initiation and Maintenance Disorders ; physiopathology ; therapy ; Spleen ; physiopathology

Medicine education must pay attention to humanity education,which is determined by the nature of medicine.The present situation and problems of the medical humanity education in china were reviewed and new approaches to improve long-term mechanism of the medical humanity education in china were enhanced from the following four apects:constructing teaching staff,setting up curriculum,reforming teaching methods and building campus-culture.

Arrhythmias, Cardiac ; Humans ; Potassium Channels, Voltage-Gated ; genetics

Adult ; Audiometry, Pure-Tone ; Case-Control Studies ; Evoked Potentials, Auditory, Brain Stem ; Hearing Loss, Noise-Induced ; diagnosis ; physiopathology ; Humans ; Male ; Middle Aged ; Noise, Occupational

The carboxyl-terminal amino acids 272-299-truncated apoE4 (delta272-299) is the main fragments of apoE4 hydrolysate in neurons. The effects of truncated-ApoE4 (delta272-299) overexpression on tau phosphorylation in cultured N2a cells were investigated. The truncated-apoE4 (delta272-299) cDNA was subcloned into pEGFP-c3 to form recombinant pEGFP-T-apoE4. pEGFP-c3, pEGFP-T-apoE4 and pEGFP-apoE4 were transfected into N2a cells respectively by lipofectamine 2000 method. After 24--48 h, tau phosphorylation was detected by Western blot assay and glycogen synthase kinase-3 (GSK-3) activity by using GSK-3 activity assay. The results showed that the overexpression of both full length-apoE4 and truncated apoE4 fragments in N2a cells induced a dramatic increase in phosphorylation of tau at Ser202 sites and the activation of GSK-3 as compared with untransfected cells, most significantly in the cells transfected with pEGFP-T-apoE4 (P < 0.05). It was concluded that in vitro overexpression of truncated-ApoE4 (delta272-299) can result in tau hyperphosphorylation in N2a cells by activating GSK-3, suggesting truncated-ApoE4 (delta272-299) might contribute the pathogenesis of Alzheimer disease.