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Traditional Chinese Medicine (TCM) exerts anti-tumor effects by intervening in A549 cells of human lung adenocarcinoma, mainly including activating or inhibiting downstream target proteins of Bcl-2 and Bax, or forming RIP1/RIP3/MLKL complex bodies by affecting pathways such as PI3K/Akt, thereby inducing apoptosis in A549 cells of lung adenocarcinoma; blocks the cell growth phase, thereby inhibiting the proliferation of lung adenocarcinoma A549 cells; inhibits invasion and metastasis of A549 cells by affecting the MMPs pathway, STAT3 pathway, and regulating epithelial mesenchymal transition related factors; suppresses or activates the expression of related proteins or affect related signaling pathways, thereby reversing the resistance of lung cancer A549/DDP cell lines to cisplatin and paclitaxel.
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Background The optimal model method for estimation of benchmark dose (BMD) does not consider the uncertainty of model selection. There is a lack of studies on using Bayesian model averaging (BMA) to estimate BMD. Objective To apply BMA to the exposure assessment of cadmium pollution in China, discuss the role of BMA in estimating BMD based on dose-response models, and to provide methodological support for health risk assessment of hazardous substances. Methods The parameters of five dose-response models (Gamma, Log-logistic, Log-probit, Two-stage, and Weibull models) estimated from the data from a cadmium-contaminated area in Baiyin City of Gansu Province and the urinary cadmium ranges in five cadmium-contaminated areas in China were used to simulate the data of varied correct models with different numbers of dosage groups (5 and 8) and different sample sizes (50, 100, and 200), then the performance of BMA and traditional optimal model were compared. The case analysis used the cadmium exposure data in Baiyin, Gansu Province. All analyses set urinary cadmium as the indicator of cadmium exposure, the abnormal rate of β2-microglobulin as the effect indicator, and the benchmark response to 10%. The correct model (the model used when simulating data), optimal model [the model with smallest Akaike information criterion (AIC)], and BMA were used to estimate BMD and lower confidence limit of benchmark dose (BMDL); the BMDs, BMDLs, and relative deviations from different methods were compared. Results In the simulation study, with increasing sample size or the number of dosage groups, the intervals of the 5th percentile and the 90th percentile of BMD tended to be narrower; when the correct model was a single model, the relative deviation of BMD estimation by BMA was greater than that of the traditional optimal model; when the correct model was an equal weight mixed model, the relative deviation of BMD estimation by BMA was less than that by the traditional optimal model. For the data of cadmium-contaminated areas, the optimal model was a Log-probit model (AIC=1814.46), followed by a Log-logistic model (AIC=1814.57); the BMDs (BMDLs) estimated by the Log-probit model, the Log-logistic model, and BMA were 3.46 (2.68), 3.16 (2.33), and 2.92 (2.07) μg·g−1, respectively. Conclusion The traditional optimal model is still recommended when the correct model is known. However, when the dose-response relationship of a hazardous substance is uncertain or with different sources or exposure grouping, compared with the traditional optimal model, BMA theoretically provides more stable estimation of BMD and BMDL by considering multiple possible alternative models.
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Using the guidelines of health economic evaluation reporting is conducive to regulating the contents of this reporting, improving the quality of studies into health economics evaluation. This article summarized the history of the guidelines and specified the instrument used to study " Quality of Health Economic Studies (QHES)" and the checklist about Consolidated Health Economics Evaluation Reporting Standards (CHEERS)-the two specific evaluation contents in this guideline, the article also introduced its present application status of the guideline and its pros and cons. The checklist of CHEERS emphasized the evaluation of this report, while QHES instrument focused on quantitative evaluation on the quality of economic studies. Despite different emphasis, the two guides are actually mutually complemented.
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Objective To investigate clinicopathological features of scalp angiosarcoma, and to analyze the relationship of tumor stage and treatment with prognosis. Methods Clinical and follow-up data were collected from 16 patients with non-metastatic primary scalp angiosarcoma treated in the Department of Plastic and Reconstructive Surgery of Zhongda Hospital, Southeast University from September 2002 to June 2013. According to the seventh edition American Joint Committee on Cancer (AJCC)TNM staging system for soft tissue sarcomas (2010), staging of scalp angiosarcoma was performed for the 16 patients. Statistical analysis was carried out by the Kaplan-Meier method for survival rates and by the Log-rank test for survival curve. The Cox regression model was used for multivariate regression analysis. Results Of the 16 patients, 4 had stageⅠangiosarcoma, 4 stage Ⅱangiosarcoma, and 8 stage Ⅲ angiosarcoma. The tumor usually began as ecchymosis-like lesions on the head or face in early stage, and progressed into dark red infiltrative plaques, nodules and ulcers which easily ruptured and bled in later stage. Histopathological examination showed generalized vascular proliferation and infiltration with high histological morphological diversity. Cytologic atypia was commonly seen. The median time to recurrence was 15 months, and local recurrence occurred in 7 patients. The median time to metastasis was 20.5 months, and distant metastasis was observed in 8 cases, including 4 cases of pulmonary metastasis, 2 lymph node metastasis, 1 liver metastasis and 1 bone metastasis. The survival time was 33.0 ± 4.4 months (median, 32 months)in 4 patients with stage Ⅰangiosarcoma, 24.0 ± 7.9 months(median, 15 months)in 4 patients with stage Ⅱangiosarcoma, and 23.9 ± 3.9 months (median, 24 months)in 8 patients with stage Ⅲ angiosarcoma. Additionally, the survival time was 23.4 ± 5.2 months(median, 21 months), 24.4 ± 5.7 months(median, 24 months)and 35.8 ± 9.7 months(median, 26 months) in 5 patients receiving surgical treatment alone, 7 patients receiving surgical treatment and radiotherapy, and 4 patients receiving surgical treatment, radiotherapy and immunotherapy, respectively. Conclusions Surgical treatment combined with radiotherapy and immunotherapy may serve as the first-choice treatment for scalp angiosarcoma. Tumor size and treatment regimens are main factors influencing prognosis of scalp angiosarcoma.
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<p><b>BACKGROUND</b>By synthesizing results from primary studies, systematic review can provide empirical information of concerned problems. This study aimed to review the available surveillance data from studies reporting the contamination surveillance of food lead in China.</p><p><b>METHODS</b>Relevant studies were identified by systematically searching Chinese Biological Medicine Database and China National Knowledge Infrastructure using the key term of "lead" for surveillance data published in Chinese between 2006 and 2012. To avoid potential selection bias, all articles were evaluated by two independent reviewers, and the disagreements were resolved by discussion or the third author was asked to arbitrate.</p><p><b>RESULTS</b>Among 269 identified publications on surveillance data of lead in food, 43 articles met the defined inclusion criteria. The food samples were divided into 11 groups (cereal grains and pulses, fish, eggs, vegetables, meat, edible fungi, milk and dairy products, fruits, offal, tea and preserved egg). Surveillance data of publications were reviewed to calculate the weighted mean and rate exceeding maximum levels. Our results indicated that the highest lead concentration was 1.937 mg/kg in tea. The total percentage of samples exceeding the maximum levels was 5.57%. Dietary exposure to lead was assessed by combining the weighted mean concentration of surveillance data with national consumption data in 2002. In this review, dietary intake of lead was 1.232 µg/kg b.w./day.</p><p><b>CONCLUSION</b>Further control measures should be taken to reduce exposure to lead, from both dietary and non-dietary sources.</p>
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Humans , China , Food Contamination , Lead , Risk Assessmentالملخص
Objective To investigate the relationship of cellular immunity of the hand-foot-mouth disease (HFMD) children and the disease severity and the variation following the recovery of disease.Methods A total of 560 HFMD cases was collected,and divided into severe and common groups.Another 120 cases were collected for comparison.T cell subsets (CD3 +,CD4 +,and CD8 +) rates were tested.The difference in cell immunity in each group were compared,and the comparison of cell immunity improv-ment during acute and recovery periods was conducted at the same time.Results In the 560 cases of children with HFMD,CoxA16-positive rate in common group was higher than that in severe group (x2 =280.72,P ＜0.01,severe cases); EV71 and other virus positive rates in severe group were higher than that in common group (x2 =127.75,P ＜ 0.01,x2 =5.43,P ＜ 0.05).Cell immunity was compared among3 groups (t =9.82,4.98,3.06); CD3+,CD4+,CD8+ results,tested within 2h after admission and after 1 week,were compared between severe and common groups (common group t =7.73,3.86,4.71; severe group t =6.13,2.60,3.36).Compared to severe group,cell immunity improvement was more obvious between before and after 1-week treatment in common group (t =2.57,2.51,2.95).The difference was statistically significant (P ＜ 0.05).Conclusions According to the etiology test of children with HFMD,CoxA16-positive rate was higher in common group; EV71 and other virus positive rates were higher in severe group.Cell immunity function decreased in severe and common group at the beginning of the disease; it was,however,significantly restored after 1-week treatment; and it was related to the severity of clinical symptoms.
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Objective To investigate the effect of Shengxue-zengbai Decoction on the expression of ICAM-1 and SCF in bone marrow tissue and on the mechanism of hematopoietic reconstitution in bone marrow transplantation (BMT). Methods The experimental animals were randomly divided into S groups: normal group received no treatment, BMT control group, G-CSF group, Shengxue group, and Shengxue +G-CSF group. BMT mouse models were established. Shengxue group, Shengxue + G-CSF group were given Shengxuezengbai Decoction. On days 9, 14, 24 after BMT, mice were killed and peripheral blood cells, bone marrow nucleated cells were detected. Histological observation of bone was made and the ICAM-1 and SCF expression were assayed by immunohistochemistry. Results In Shengxue-zengbai Decoction group, the peripheral blood cell, bone marrow nucleated cell on the days 9, 14, 24 after BMT were higher than the other control groups. The expression of ICAM-1 and SCF than in the other control groups (P . Conclusion Shengxue-zengbai Decoction enhances ICAM-1 and SCF expression in bone marrow after syngenic bone marrow transplantation in mice, which may be related to the mechanisms of its accelerating hematopoietic reconstitution in allogenic bone marrow transplantation.
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AIM: To study the effects of astragalosides (AS) on the proliferation and cell cycle of rat glomerular mesangial cell (MC), and verify the correlation between the influence and the AS concentration. METHODS: The experiment was carried out in the Physiological Laboratory of Liaoning Medical University from December 2006 to July 2007. Rat glomerular MCs were cultured in high glucose for 4-7 passages. The experiments were randomly divided into control group and three AS groups with different concentrations (50, 100, 200 mg/L), which were treated with high-glucose liquid and AS respectively. MC proliferation was determined with MTT colorimetric method in each group at hours 48 after intervention. MC cell cycle was detected with flow cytometry. RESULTS: ①MTT results showed that, the values of A490 nm in AS groups were lower than that in the control group at hours 48 (P
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Objective To explore the therapeutic mechanism of blood- activating and blood- stasis- removing (BABAR) therapy for polycythemia vera (PV).Methods Ten first- visit or un- relieved outpatients and inpatients were treated with BABAR therapy for 12 weeks. Healthy volunteers served as the normal control. Before treatment and 1, 4, 8 and 12 weeks after treatment, the apoptotic rates of bone marrow mononuclear cells (BMMC) was analyzed with the TUNEL method. The expression of bcl- 2 and p53 was observed by the method of immunohistochemistry and their mRNA expression by the method of hybridization in site.Results One, four and eight weeks after treatment, the apoptotic rates of BMMC was increased as compared with those before treatment (P 0.05).The gene expression level of Bcl- 2 and p53 and their RNA expression level in the patients before treatment were higher than those in the normal control(P