OBJECTIVE:To raise the exigency capacity of drug system to cope with the unexpected events of public heal_ th.METHODS:To set up a national drug contingency system(NDCS)for the unexpected events of public health.RESULTS:The NDCS should consist of the reserves of drugs,capacity,information and plan for emergent needs.CONCLUSION:Estab?lishment of NDCS is a way to access health mordernization.

Adult ; Aneurysm, Dissecting ; Humans ; Male ; Pulmonary Artery

Objective To investigate the expression level and clinical significance of T‐cadherin protein and gene in the mixed cell type of hybrid hodgkin lymphoma .Methods The lymph nodetissue samples were obtained from 45 hybrid Hodgkin lymphoma patients and 20 reactive hyperplasia lymphoid patients .The expression level of T‐cadherin of these samples were detected by immu‐nohistochemical staining and RT‐PCR .The relationship of clinic pathological features and prognosis in hybrid Hodgkin lymphoma patients were analyzed by the expression level of T‐cadherin .Results The positive expression rates of T‐cadherin in protein hybrid hodgkin lymphoma and reactive hyperplasia lymphoid tissue specimens were 31 .1% (14/45) and 90 .0% (18/20)(P< 0 .05) .T‐cad‐herin mRNA relative expression in hybrid Hodgkin lymphoma was significantly lower than reactive hyperplasia lymphoid tis ‐suespecimens(P< 0 .05) .The expression of T‐cadherin was significantly correlated with TNM and lymph node involvement (all P< 0 .05) ,but not significantly correlated with age ,gender ,WBC ,PLT and Hb count ,LDH and IPS grade (all P> 0 .05) .Multiva‐riate logistic regression analysis demonstrated TNM stage and T‐cadherin negative expression were independent factors of lymph node involvement .Log‐rank test revealed the two‐year survival rate in hybrid Hodgkin lymphoma patients of T‐cadherin negative and positive expressionwere 83 .9% and 92 .9% (P> 0 .05) ,three‐year survival rate were 71 .0% and 85 .7% (P> 0 .05) ,five‐year survival rate were 41 .9% and 78 .6% (P< 0 .05) .Kaplan‐Meier survival analysis showed the five‐year survival in T‐cadherin nega‐tive expressionwas lowersignificantly than T‐cadherin positive expression (P< 0 .05) .Conclusion T‐cadherin was low expression in hybrid Hodgkin lymphoma and correlated with TNM and lymph node involvement .T‐cadherin may be a new molecular marker to evaluate the prognosis of hybrid hodgkin lymphoma .

Objective:To investigate the expression pattern of MMP-11 and MMP-14 in breast carcinoma, and the effect of MMP-11 on breast carcinoma cell migration and invasion. Methods:MMP-11 and MMP-14 expression were examined in 161 invasive breast carcinoma tissue samples and 10 normal breast tissue samples. siRNA was used to knockout MMP-11 in breast carcinoma cell line MB-231 and Transwells were used to evaluate changes in migration ability and invasion ability. Results:Both MMP-11 and MMP-14 were highly expressed in breast carcinoma samples,122 and 149 samples out of 161,respectively. The expression of both proteins were correlated with lymph node metastasis and TNM staging. After knockout of MMP-11,the expression of both proteins decreased in MB-231 cell line and experiments show that the cell′s migration and invasion abilities were significantly weakened. Conclusion:MMP-11 and MMP-14 could promote invasion and metastasis of breast carcinoma. Knockout of MMP-11 results in the downregulated expression of MMP-14,and the inhibition of breast carcinoma cell′s migration and invasion. They could be potential prognostic markers and treatment targets for of breast carcinoma.

Background and purpose:A chemokine receptor,CXCR4,and its endogenous ligand,stromal cell-derived factor-1(SDF-1),have been recognized to be involved in the invasion and metastasis of cancer.Inhibition of CXCR4 may be a new therapeutic target.We studied whether shRNA-CXCR4 could inhibit the CXCR4 gene expression and the proliferation in MCF-7,MDA-MB-231 and MDA-MB-435s breast cancer cells.Methods:Through knockdown CXCR4 by shRNA,the CXCR4 mRNA expression was detected by RT-PCR and the CXCR4 protein expression was mesured by Western blot.The proliferation of breast cancer cells was evaluated by MTT and flow cytometry.Results:The CXCR4mRNA and its protein expression decreased significantly in MCF-7(the average level of CXCR4 mRNA and protein expression were 0.089,0.177 in PG-CXCR4 group,compared with 0.327 and 0.313 for mRNA expression,0.911,0.874 for protein expression in control and PG-HK group),MDA-MB-231(the average level of CXCR4 mRNA and protein expression were 0.152 and 0.153 in PG-CXCR4 group,compared with 0.40 and 0.45 for mRNA expression,0.829 and 0.878 for protein expression in control and PG-HK group)and MDA-MB-435s(the average level of CXCR4 mRNA and protein expression were 0.198 and 0.173 in PG-CXCR4 group,compared with 0.69 and 0.77 for mRNA expression,0.877 and 0.906 for protein expression in control and PG-HK group)breast cancer cells(P

Objective To study whether shRNA-CXCR4 could inhibit the CXCR4 gene expression in MCF-7,MDA-MB-231 and MDA-MB-435s breast cancer cells.Methods After the knockdown of CXCR4 by shRNA,the CXCR4 mRNA expression by RT-PCR and the CXCR4 protein expression by Western blotting in breast cancer cells were examined.Results The CXCR4 mRNA expression and its protein expression were decreased significantly in MCF-7,MDA-MB-231 and MDA-MB-435s breast cancer cells by shRNA-CXCR4(P

Objective To study the expression of chemokine receptor-4(CXCR4) in human breast cancer and its correlation with the prognostic factors.Methods Forty-four samples of breast cancer were collected from Sep.2004 to Jan.2006.The expressions of CXCR4 mRNA and protein were evaluated by RT-PCR and Western blotting respectively.The expressions of CXCR4,estrogen receptor(ER),progesterone receptor(PR) and C-erbB-2 were examined by immunohistochemical methods.The clinicopathological features,such as ages,menstrual status,lymph node metastasis,tumor size and histological grading were recorded and analyzed.The relationship between CXCR4 and the clinicopathological features was analyzed.Results The immunohistochemical staining showed that CXCR4 expressed mainly in cytoplasm and little in nuclei.CXCR4 mRNA and protein expressed differently in 44 samples of breast cancer,and the expressive level increased with the increase in metastatic lymph nodes number.Compared with axillary lymph nodes metastasis negative group,the expression of CXCR4 mRNA and protein increased significantly in ≥4 and 1-3 nodes metastasis groups(P0.05).Conclusion CXCR4 might play an important role in promoting the metastasis of breast cancer.

Abstract: Objective - To understand the status of occupational hazards in non coal mine mountains in Hunan Province. Methods - - A cross sectional survey was conducted on 432 non coal mining enterprises in Hunan Province in 2021. The field ， occupational health survey occupational disease hazard factors detection and occupational health monitoring data analysis were Results - carried out. Limited liability companies and private enterprises were the main economic types of non coal mining ， ， mountains in Hunan Province accounting for 55.3% and 32.4% respectively. The size of enterprises was mainly small and ， ； - micro enterprises accounting for 59.3% and 35.2% respectively 78.0% of the enterprises were in non metallic mining. The - ， over standard rates of silica dust and noise in workplaces were 17.1% and 29.4% respectively. The exposure rate of ， （P ） occupational hazard factor was 47.3%. The smaller the enterprise scale the higher the exposure rate <0.01 . The number of ， ， people exposed to silica dust and noise was the largest with the exposure rate of 29.4% and 31.0% respectively. The rates of ， occupational health training for persons in charge of enterprises occupational health management personnel and workers were ， ， ， 73.8% 73.4% and 85.0% respectively. The smaller the enterprise scale the lower the occupational health training rates of ， ， enterprise leaders occupational health management personnel and workers and the lower the implementation rates of （ P ） - - enterprise occupational health examination all <0.05 . The fully installed rate and effective rate of occupational disease ； prevention facilities were 6.9% and 1.6% respectively and the fully deployed rate and effective wearing rate of personal ， protective equipment were 11.1% and 6.2% respectively. The detection rates of occupational contraindications and suspected ， Conclusion occupational diseases in workers exposed to silica dust and noise were 2.0% and 2.9% respectively. The - ， occupational risks such as silica dust and noise are serious in non coal mine mountains of Hunan Province and the foundation of occupational health management is weak in small and micro enterprises.