The tumor microenvironment is a special environment including tumor cells,stromal cells and extracellular matrix.The notion that the tumor microenvironment is a necessary functional unit to support cancer progression,metastasis and recurrence has been accepted by more and more scholars.Studies have shown that exosomes may play a pivotal role in tumor progression that involved in cell-cell communication in the tumor microenvironment.Here,we summarize the recent publications on the characteristics of exosomes,its biological effects and the potential roles as an important part of the tumor microenvironment during tumor progression.

Objective To understand the status and distribution of the Xinjiang Uygur and Han middle-aged and elderly population who suffer from cardio-cerebral vascular disease.Methods From July 2004 to June 2007,multi-stage stratified random cluster sampling methods was adopted to collect the random samples older than 50-year-old suffering from cardiovascular and cerebrovascular disease in South Xinjiang.Results In the 3685 Uygur and Han ethnic elderly people,the prevalence of hypertension,diabetes,lipid disorders,cerebrovascular disease and dementia were 28.20%,6.70%,15.39%,12.46% and 4.10% respectively in the southern border regions of Xinjiang.Except hypertension,the prevalence rate of other cardiovascular and cerebrovascular diseases in Uygurs and hans had significant differences.The survey found that the prevalence rate of dyslipidemia and diabetes in Hans was higher than the Uygurs,while the Uygurs prevalence rate of cerebrovascular disease and dementia.Conclusion The Xinjiang Uygur and Han elderly are faced with a grim situation of cardiovascular and cerebrovascular diseases;there are significant differences for the nationality and gender.

OBJECTIVETo investigate the apoptosis and proliferation effect of matrine on human medulloblastoma cell line D341 in vitro and the effect of the expression of the related caspase 3 and caspase 9 proteins.

METHODSThe D341 cells were cultivated successfully in vitro. Then the cells were divided into 5 groups according to the concentration of matrine (0.5 mg/mI group, 1.0 mg/ml group, 1.5 mg/ml group, 2.0 mg/ml group and the control group was 0 mg/ml). All the experiments were repeated three times. The cell morphologic and structure change was observed with the optical microscope and the transmission electron microscope. The proliferation of D341 cell was analyzed using Cell Counting Kit-8 assay. Apoptosis was detected by Annexin V-FITC/PI double staining. The expression of Caspase3 and Caspase9 was detected by Western blot.

RESULTSWith the effect of matrine, the proliferation inhibition rate gradually increased with drug concentrations increasing, and there was a significant difference (P < 0.01). The inhibitory effect of matrine on cell proliferation was different with the different treatment time, there was a significant difference between the 24 h to 72 h groups (P < 0.01). The apoptotic rate increased with matrine concentrations increasing. There were significant differences between the group of 0.5 mg/mI or 1.0 mg/mI to the group of 1.5 mg/mI or 2.0 mg/mI (P < 0.05). The apoptotic rate increased with the prolonged treatment time. There were significant differences between the group of 24 h or 48 h to the group of 72 h ( P < 0.05). With the increase of matrine concentration, the expression of Caspase 3 and Caspase 9 increased (P < 0.01).

CONCLUSIONMatrine induces the apoptosis, and inhibits the proliferation of human medulloblastoma D341 cells in vitro by up-regulation of the expression level of Caspase3, Caspase9.

Alkaloids ; pharmacology ; Apoptosis ; Caspase 3 ; metabolism ; Caspase 9 ; metabolism ; Cell Line, Tumor ; Cell Proliferation ; Cerebellar Neoplasms ; metabolism ; pathology ; Humans ; Medulloblastoma ; metabolism ; pathology ; Quinolizines ; pharmacology ; Up-Regulation

Adenocarcinoma ; metabolism ; pathology ; Adult ; Aged ; Carcinoma, Non-Small-Cell Lung ; metabolism ; pathology ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Female ; Humans ; Immunohistochemistry ; Lung ; chemistry ; pathology ; Lung Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Oxidoreductases ; metabolism ; Sex Factors ; Smoking ; Tumor Suppressor Proteins ; metabolism ; WW Domain-Containing Oxidoreductase

Objective To analyze the amount and allocation of pediatric healthcare resources in Chengdu,and to recommend on local pediatric healthcare resources shortages.Methods Pediatric healthcare resources data of Chengdu came from pediatric relevant data reported regularly at yearend by the counties and districts to healthcare administration of the city.Data from such reports were subject to statistics with various indexes and descriptive analysis.Analyzed in focus was the distribution in 2015 of pediatric healthcare resources of the city among medical institutions of various types,levels and properties,as well as causes for such shortage.Results Tertiary hospitals hold 62.3% of the pediatric beds and 64.2% of pediatricians,and provide around 70% of the medical workload for pediatric outpatients and inpatients,upon the majority of pediatricians with master degree and above,and senior ones of/above associate chief physician titles;Tertiary hospitals have 58.7% of the pediatric beds and 49.7% of pediatricians,yet the outpatients served by specialized hospitals were 5% above tertiary hospitals.Conclusions The imbalance and shortage in total of pediatric resources in Chengdu result from stable source of manpower supply,high professional risk exposure,low income,and long training duration among others.Such measures as a better pediatrician development system,greater incentives for pediatric development,and enhanced development pediatric service consortiums,as well as greater support for private specialized pediatric hospitals.Those measures combined can effectively alleviate the shortage of pediatric resources.

Objective To investigate effects of very early hyperbaric oxygen treatment (HBOT) on patients with malignant brain edema after surgical operation for treatment of severe traumatic brain injury (TBI).Methods A total of 146 patients who suffered from malignant brain edema after last surgical operation for severe TBI were enrolled for this study.According to the intervention time of HBOT,they were randomized into a very early group (HBOT within 3 days after operation,n =55),an ordinary group (HBOT at 4 to 10 days after operation,n =65) and a control group (non-HBOT,n =26).Mortality rate of the 3 groups were recorded within 4 weeks after operation,and GCS (Glasgow Coma Scale) score were assessed in 1,2,3 and 4 weeks after operation.Dynamic head CT scan were performed for detecting brain status and for determine the duration of brain edema.Results The mortality of the very early group,the ordinary group and the control group were 10.9％,7.7％ and 11.5％,respectively,and no statistically significant difference was revealed among the groups (P ＞ 0.05).In very early group,the GCS scores of 1,2,3 and 4 weeks after operation were (8.837 ±3.350),(10.755 ± 3.388),(11.633 ± 3.408) and (12.367 ± 3.408),respectively,with significant difference between the time points 1 week and 2,3 and 4 weeks as well as 2 and 4 weeks after surgery (P ＜0.05),but not between 2 and 3 as well as 3 and 4 weeks after surgery (P ＞ 0.05).In ordinary group,the GCS scores at 1,2,3 and 4 weeks after surgery were (8.509 ±3.042),(9.458 ±3.115),(10.186 ±3.203) and (10.627 ±3.439),respectively,with significant difference between 1 week and 2,3 and 4 weeks after operation (P ＜ 0.05).In control group,the GCS scores at 1,2,3 and4 weeks after surgery were (8.042 ±2.881),(8.417 ±2.962),(8.542 ±3.02) and (8.958 ± 3.043),with no statistical difference among different time points (P ＞ 0.05).When compared with the very early group,the GCS sores of the ordinary group and the control group were significantly lower after intervention (P ＜ 0.05),and the GCS of control group was lower than that of the ordinary group (P ＜ 0.05).As for brain edema duration,the very early group was the shortest among the 3 groups (P ＞ 0.05) Conclusion Very early hyperbaric oxygen treatment could improve consciousness state and alleviate malignant brain edema after surgical operation in TBI patients.

To discover novel fluoroquinolone lead compounds as possible anti-infective or/and antitumor chemotherapies, combination principle of pharmacophore-based drug design, a series of novel tricyclic fluoroquinolone title compounds, [1,2,4]triazino[3,4-h][1,8]naphthyridine-8-one-7-carboxylic acid derivatives ( 5a-5p), were designed and synthesized with a fused [1,2,4]-triazine ring unit. Their structures were characterized by spectral data and elemental analysis and the in vitro antibacterial and anti-cell proliferation activities were also evaluated. The results showed that the titled compounds exhibited more significant inhibitory activities against drug-resistant bacteria (Methicillin-resistant Staphylococcus aureus and multi drug-resistant Escherichia coli strains) and three tested cancer cell lines (human hepatoma SMMC-7721, murine leukemia L1210 and human murine leukemia HL60 cells). Interestingly, SAR showed that compounds with electron-donating groups attached to benzene ring had stronger antibacterial activity than antitumor activity, but electron-withdrawing compounds displayed more potential antitumor activity than antibacterial activity, especially antitumor activity of nitro compounds was comparable to comparison doxorubicin. Thus, novel triazine-fused tricyclic fluoroquinolones as potent anti-infective or/and antitumor lead compounds are valuable to pay attention and for further development.
Animals ; Anti-Bacterial Agents ; chemical synthesis ; chemistry ; Antineoplastic Agents ; chemical synthesis ; chemistry ; Carboxylic Acids ; Carcinoma, Hepatocellular ; Cell Line ; Cell Proliferation ; Drug Design ; Escherichia coli ; drug effects ; Fluoroquinolones ; chemical synthesis ; chemistry ; HL-60 Cells ; Humans ; Leukemia L1210 ; Liver Neoplasms ; Methicillin-Resistant Staphylococcus aureus ; drug effects ; Mice ; Naphthyridines ; Triazines

To explore an efficient strategy for the conversion of antibacterial fluoroquinolones into antitumor fluoroquinolones, an azole heterocyclic ring of oxadiazole instead of the C-3 carboxylic acid group with a functionalized hydrazone group as a modified side-chain, fifteen novel 2-(fluoroquinolon-3-yl)-oxadiazole-5- sulfanylacetylhydrazone derivatives 7a-7o were designed and synthesized on the basis of the pharmacophore hybridization principle from pefloxacin, separately. The structures for fifteen title compounds were characterized by elemental analysis, 1H NMR and MS, and their in vitro antitumor activity against Hep-3B cell line was evaluated by a MTT assay. The results showed that the title compounds exhibited more significantly inhibitory activity than that of the parent pefloxacin, in which compounds with electron-withdrawing group attached on aryl ring had more potency than that of compounds with electron donating group, especially compounds with a carboxylic substituent were comparable to comparison doxorubicin. It suggests that it is favorable for an improvement of antitumor activity to remain a carboxylic acid unit at the aromatic ring.
Antineoplastic Agents ; chemical synthesis ; chemistry ; Cell Line, Tumor ; Fluoroquinolones ; chemistry ; Humans ; Oxadiazoles ; chemistry ; Structure-Activity Relationship

Arachidonic acid is an essential fatty acid in human nutrition and a biogenetic precursor of the biologically active prostaglandins and leukotrienes. ?~5 desaturase catalyzes the ?~5 dehydrogenation of di-homo-?-linolenic acid to form arachidonic acid in biosynthetic pathway of arachidonic acid. Using real time PCR technology,the transcriptional expression levels of gene encoding ?5 desaturase in three Mortierella alpina strains M10,M6 and M23,and in different growth phase of high arachidonic acid yielding strain M6,were determined. Results showed that there was a distinct corelationship between mRNA transcript level of ?~5 desaturase gene and biosynthesis of arachidonic acid. Results indicated that ?~5 desaturase plays an important role in arachidonic acid biosynthesis.

Gymnastics ; physiology ; Humans ; Workload