To investigate the effects of cembrane-type diterpenes extracted from Sinularia flexibilis on the proliferation of PC12 cells and their protective effects on PC12 cells exposed to glutamate.

Objective To study the feasibility of a simple random sampling on surveys at the community level and to evaluate the quality of samples under survey.Methods A simple random sample of households was taken,based on the electronic listings of community households from Gongshu and Xiacheng districts of Hangzhou city.One of the adults aged 18 to 64 years in the sampled households was identified with KISH method to finish a questionnaire survey.More than 500 people from the sample size was required in each district.Results Of 950 sampled households in Xiacheng district,511 (53.8%) finished the survey while 506 (36.7%) out of the 1380 sampled households in Gongshu district did.The proportions of non-response due to the following reasons as:none with eligible age in the households,relocation of the original household,mass relocation of the community,and errors in the household listings etc.were 38.3% and 43.5% respectively,in the two districts.Proportions attributed to non-response and refusal to response of sampled household or individual were 8.0% and 19.9% respectively.No statistical significant differences in age and gender were found between the surveyed samples and the population in the sampled households,or in gender between the populations in the sampled households and in Hangzhou city.However,the population in the sampled households showed a more aging population structure than the population in Hangzhou city.Conclusion In a geographically limited area,using a simple random sampling method to do the survey is feasible,based on the electronic listings of household.Enough time spent during the household visit guarantees the interviewers to get a representative sample of the sampling frame.There is an urgent need for the timeliness,completeness and accuracy of electronic household listings to be improved.

BACKGROUND: The quality of treatment for critically ill children varies widely at different hospitals. This study aimed to analyze the characteristics of mortality in a pediatric emergency department (PED) at a tertiary children's hospital in Guangzhou, China and to investigate the risk factors associated with the mortality. METHODS: The mortality of pediatric patients at the hospital from 2011 to 2013 was retrospectively analyzed using descriptive statistics. RESULTS: Altogether 466919 patients visited the PED during the period and 43925 of them were admitted for further observation. In 230 deaths, the ratio of boys to girls was 1.4:1, and their age ranged from 2 hours to 16 years (median, 5 months). The time from admission to death ranged from 0 to 216 hours (median, 1.5 hours). There were 92 (40％) patients who died within 24 hours after admission and 104 (45.2％) patients who died on arrival. The prominent causes of the deaths were respiratory diseases, neuromuscular disorders, cardiovascular diseases, and sepsis, most of which were ascribed to severe infection. Sixty-five deaths were associated with more than one concomitant problem. The top concomitant problems were congenital malformation, low gestational age, and severe birth asphyxia. CONCLUSIONS: In our center, 40％ of the patients in the PED died of fatal acute diseases, and pneumonia was the first leading cause of the deaths. Almost half of the deaths occurred on arrival and the rest were due to end-stage malignant diseases. This study emphasized the importance of prevention of birth deficits by reducing deaths in infants and children.

OBJECTIVE: Over-expression of thrombin in ovarian cancer cells is associated with poor prognosis. In this study, we investigated the role of thrombin in inducing epithelial-mesenchymal transition (EMT) in SKOV3 epithelial ovarian cancer cells. METHODS: After thrombin treatment SKOV3 cells were subjected to western blots, reverse-transcription PCR, and enzyme-linked immunosorbent assay to quantify EMT-related proteins, mRNA expression of SMAD2, DKK1, and sFRP1, and the secretion of matrix metalloproteinases (MMPs) and cytokines. Meanwhile, invasion ability was evaluated using transwell assays. RESULTS: The results indicated a dose- and time-dependent down-regulation of E-cadherin and upregulation of N-cadherin and vimentin in thrombin-treated SKOV3 cells, compared with the thrombin-free control group (p<0.05). There was a dose- and time-dependent increase in the levels of SMAD2 and DKK1 mRNAs and a decrease in the levels of sFRP1 mRNA in thrombin-treated SKOV3 cells compared to control cells (p<0.05). Thrombin-treated SKOV3 cells exhibited increased secretion of MMP-9, MMP-2, interleukin (IL)-8, and IL-6 and increased invasion compared to untreated cells (p<0.05). Thrombin altered the morphology of SKOV3 cells to a spindle-like phenotype. Addition of hirudin to thrombin-treated cells reversed the effects of thrombin. CONCLUSION: Thrombin induced EMT and promoted the invasion of SKOV3 cells, possibly via distinct signaling pathways. Hirudin inhibited the effects of thrombin, suggesting that anticoagulant therapy could be a novel therapeutic strategy for ovarian carcinoma.
Blotting, Western ; Cadherins ; Cytokines ; Down-Regulation ; Enzyme-Linked Immunosorbent Assay ; Epithelial-Mesenchymal Transition ; Hirudins ; Interleukin-6 ; Interleukins ; Matrix Metalloproteinases ; Neoplasms, Glandular and Epithelial ; Ovarian Neoplasms ; Phenotype ; Polymerase Chain Reaction ; Prognosis ; Proteins ; RNA, Messenger ; Thrombin ; Up-Regulation ; Vimentin

OBJECTIVETo discuss the clinical findings and treatment of paraneoplastic pemphigus (PNP) with Castleman's disease.

METHODSTo investigate the clinical, histopathologic and CT findings of 8 cases paraneoplastic pemphigus with Castleman's disease.

RESULTSAll of 8 patients were diagnosed PNP first and were found Castleman's tumor incidently during routine examination. All 8 cases showed severe erosion or ulcer of the oral mucosa with various skin lesions. Histopathologically, there were intraepidermal acantholytic vesicle, basal cell liquefaction, necrotic keratinocytes in the epidermis and lymphocyte infiltration in the upper dermis. CT scan appeared solitary mass in these patients. Some of them were attacked by bronchiolitis obliterans. All 8 patients were failed by use of predisone. Obvious relief of PNP and pulmonary lesion occurred after tumor was rescted.

CONCLUSIONSParaneoplastic pemphigus with Castleman's disease is a rare disease. The key step is to find and resect the tumor in abdomen. CT scan should be used to detect the tumor in patients with PNP, especially, when predisone was failed in treatment.

Adolescent ; Adult ; Castleman Disease ; complications ; diagnosis ; therapy ; Combined Modality Therapy ; Female ; Humans ; Male ; Paraneoplastic Syndromes ; complications ; diagnosis ; therapy ; Pemphigus, Benign Familial ; complications ; diagnosis ; therapy ; Retrospective Studies

OBJECTIVETo investigate the expression characteristics of the gene of coiled-coil domain-containing protein 70 (Ccdc70) in the mouse testis and its potential role in spermatogenesis.

METHODSUsing expression profile microarray, we screened the mouse testis-specific gene Ccdc70, studied its expression characteristics in the mouse testis by RT-PCR, real-time PCR, Western blot and immunohistochemistry, followed by bioinformatic analysis of the Ccdc70 protein.

RESULTSThe Ccdc70 gene was expressed highly in the testis but lowly in the epididymis of the mice. The Ccdc70 protein was expressed mainly in the spermatocytes and round spermatids of the testis and in the epithelial cells of the epididymis. Bioinformatic analysis showed a structural domain in the Ccdc70 protein, which was highly conserved in mammalian evolution.

CONCLUSIONThe Ccdc70 gene is highly expressed in the mouse testis and mainly in the spermatocytes, round spermatids, and epididymal epithelial cells, which indicates that it is involved in the regulation of spermatogenesis and epididymal sperm maturation.

Animals ; Computational Biology ; Gene Expression Regulation, Developmental ; Male ; Mice ; Proteins ; genetics ; Spermatogenesis ; genetics ; Testis ; metabolism

Background: Pseudorabies virus (PRV) infection leads to high mortality in swine. Despite extensive efforts, effective treatments against PRV infection are limited. Furthermore, the inflammatory response induced by PRV strain GXLB-2013 is unclear. Objectives: Our study aimed to investigate the inflammatory response induced by PRV strain GXLB-2013, establish an inflammation model to elucidate the pathogenesis of PRV infection further, and develop effective drugs against PRV infection. Methods: Kunming mice were infected intramuscularly with medium, LPS, and different doses of PRV-GXLB-2013. Viral spread and histopathological damage to brain, spleen, and lung were determined at 7 days post-infection (dpi). Immune organ indices, levels of reactive oxygen species (ROS), nitric oxide (NO), and inflammatory cytokines, as well as levels of activity of COX-2 and iNOS were determined at 4, 7, and 14 dpi. Results: At 105 –106 TCID50 PRV produced obviously neurological symptoms and 100% mortality in mice. Viral antigens were detectable in kidney, heart, lung, liver, spleen, and brain. In addition, inflammatory injuries were apparent in brain, spleen, and lung of PRVinfected mice. Moreover, PRV induced increases in immune organ indices, ROS and NO levels, activity of COX-2 and iNOS, and the content of key pro-inflammatory cytokines, including interleukin (IL)-1β, IL-6, tumor necrosis factor-α, interferon-γ and MCP-1. Among the tested doses, 10 2 TCID 50 of PRV produced a significant inflammatory mediator increase. Conclusions An inflammatory model induced by PRV infection was established in mice, and 102 TCID50 PRV was considered as the best concentration for the establishment of the model.

Abstract?AIM: To investigate mechanism of bradykinin ( BK) on inflammations of retinal pigment epithelium ( RPE) cells.?METHODS: ARPE -19 cells were cultured in vitro, stimulated by 100nM BK for 24h. Cell morphology changes were observed by microscope, and BK receptor localization was detected through cell immunofluorescence. Changes of Ca2+in BK and BR antagonist stimuli were detected by laser scanning confocal microscopy.The expressions of COX-1, COX-2, eNOS and iNOS protein in control group and BK group were detected by Western Blot.?RESULTS: After the stimulation of BK, there was no significant changes of ARPE-19 cells in morphology.Kinin B1 receptors ( B1R ) and B2 receptors ( B2R ) could be detected in ARPE-19 cells.Compared with control group, Ca2+concentrations significantly increased in BK group; in B1R antagonist group and B2R antagonist group Ca2+concentrations increased less than BK group; B1R and B2R antagonist group showed no obvious changes in Ca2+concentrations.Compared with control group, COX-2 and iNOS protein concentrations were significantly increased in BK group (P<0.001).?CONCLUSION:BK induces the increasing expression of COX-2 and iNOS in the cultured ARPE cells through binding with either B1R or B2R.

Objective:To observe the effect of dictyophora polysaccharide (DIP) on PINK1/Parkin pathway mediated mitophagy induced by sodium arsenite (NaAsO 2) in human hepatocytes (L-02 cells). Methods:The L-02 cells in logarithmic growth phase and in good condition were divided into control group, NaAsO 2 group (10 μmol/L), DIP group (80 μg/ml), DIP + NaAsO 2 group (80 μg/ml DIP + 10 μmol/L NaAsO 2) , N-acetylcysteine (NAC) group (5 mmol/L), and NAC + NaAsO 2 group (5 mmol/L NAC + 10 μmol/L NaAsO 2). Western blotting was used to detect the expression levels of mitophagy related proteins p62, microtubule-associated protein 1 light chain 3 (LC3)Ⅱ/LC3Ⅰ, PINK1, and Parkin. The mitochondrial stucture and autophagosomes were observed by transmission electron microscope, the fluorescent probe method was used to detect the expression level of intracellular reactive oxygen species (ROS). Results:Compared with the control group, the protein expressions of p62, LC3 Ⅱ/LC3 Ⅰ, PINK1, and Parkin in NaAsO 2 group were higher ( P < 0.05); compared with the NaAsO 2 group, the protein expressions of p62, LC3 Ⅱ/LC3 Ⅰ, PINK1 and Parkin were lower in DIP, DIP + NaAsO 2, NAC, and NAC + NaAsO 2 groups ( P <0.05). According to the transmission electron microscope, compared with the control group, the mitochondria of L-02 cells in NaAsO 2 group were significantly damaged and the number of autophagosomes increased. Compared with NaAsO 2 group, the degree of mitochondrial swelling, vacuolar degeneration and the number of autophagosomes decreased in DIP + NaAsO 2 group. Compared with the control group (33 110.00 ± 2 191.28), the intracellular ROS level in NaAsO 2 group was higher (48 000.00 ± 2 395.31, P < 0.05); the level of intracellular ROS in DIP + NaAsO 2 group (38 670.00 ± 2 620.56) was significantly lower than that in NaAsO 2 group( P < 0.05), and there was no significant change compared with the control group ( P > 0.05). Conclusions:NaAsO 2 can induce PINK1/Parkin mediated mitophagy in L-02 cells. DIP can alleviate NaAsO 2 induced mitophagy. DIP may affect PINK1/Parkin mediated mitophagy induced by NaAsO 2 through the regulation of ROS.

Background: Pseudorabies virus (PRV) infection leads to high mortality in swine. Despite extensive efforts, effective treatments against PRV infection are limited. Furthermore, the inflammatory response induced by PRV strain GXLB-2013 is unclear. Objectives: Our study aimed to investigate the inflammatory response induced by PRV strain GXLB-2013, establish an inflammation model to elucidate the pathogenesis of PRV infection further, and develop effective drugs against PRV infection. Methods: Kunming mice were infected intramuscularly with medium, LPS, and different doses of PRV-GXLB-2013. Viral spread and histopathological damage to brain, spleen, and lung were determined at 7 days post-infection (dpi). Immune organ indices, levels of reactive oxygen species (ROS), nitric oxide (NO), and inflammatory cytokines, as well as levels of activity of COX-2 and iNOS were determined at 4, 7, and 14 dpi. Results: At 105 –106 TCID50 PRV produced obviously neurological symptoms and 100% mortality in mice. Viral antigens were detectable in kidney, heart, lung, liver, spleen, and brain. In addition, inflammatory injuries were apparent in brain, spleen, and lung of PRVinfected mice. Moreover, PRV induced increases in immune organ indices, ROS and NO levels, activity of COX-2 and iNOS, and the content of key pro-inflammatory cytokines, including interleukin (IL)-1β, IL-6, tumor necrosis factor-α, interferon-γ and MCP-1. Among the tested doses, 10 2 TCID 50 of PRV produced a significant inflammatory mediator increase. Conclusions An inflammatory model induced by PRV infection was established in mice, and 102 TCID50 PRV was considered as the best concentration for the establishment of the model.