Objective To investigate the prevalence of dermatosis affecting pilots in different areas. Methods From Oct. 2007 to Sep. 2008,epidemiological investigation and clinical examination were carried out in 255 pilots stationed at Beijing,Tianjin,Hubei and Shaanxi regions. In order to get the correct diagnosis of dermatosis and the accurate number of infection cases/time,same medication and management were applied for the treatment of those skin disorders. The epideomology of dermatosis in pilots of different troops and age groups were then compared,and the correlation factors affecting the epidemics were analyzed with Chi-square test. Results Among 255 pilots,430 cases (times) were found to suffer from 47 kinds of dermatosis,of whom 72% suffered from two or more kinds of dermatosis. The incidence of superficial mycosis (69.8%) took ranked the highest. The incidence of dermatosis was different among the pilots stationed in different regions. The prevalence of lichen simplex chronicus was higher in the pilots stationed in Beijing,Tianjin and Shaanxi regions than in those in Hubei region,while the prevalence of tinea manuum and tinea pedis showed the opposite status (P 7 year enlistment (P

Objective To investigate the effect of human hepatocellular carcinoma HepG2 cell-derived Exosome on the differentiation of mesenchymal stem cells(MSC)into cancer-associated myofibroblasts(CAF)and the impacts of CAF on liver cancer cell proliferation,migration,and invasion. Methods The protein expression of HepG2 cell-derived Exosome was detected by Western blotting. MSCs were separated from human adipose tissue and cultured with HepG2 cell-derived Exosome(100 ng/nl)to initiate differentiation. The expressions of mesenchymal markers and several interleukins were also detected by Western blotting. HepG2 cells were co-cultured with the conditioned media(CM),in which HepG2 Exosome induced the differentiation of MSC into CAF. The expressions of epithelial and mesenchymal markers were detected by real-time polymerase chain reaction(PCR)and Western blotting. Cell proliferation was assessed using MTS assay. Transwell chambers were used in the in vitro migration and invasion assay. Results HepG2 cell-derived particles expressed CD63,70 kilodalton heat shock proteins,and 90 kilodalton heat shock proteins. With the treatment of HepG2 cell-derived Exosome,the expressions of mesenchymal marker α-smooth muscle actin,fibroblast activation protein α,interleukin(IL)-6,IL-8,and IL-1β were up-regulated,while vascular endothelial growth factor had no significant change. The conditioned media which HepG2 Exosome induced MSC differentiation CAF(CAF-CM)could significantly promote HepG2 cells proliferation(1.075±0.104),compared to BSA control(0.874±0.066,P=0.023)and MSC-CM(0.649±0.034,P=0.0005). CAF-CM could significantly enhance cell migration [(42.5±9.1) cells vs.(18.5±3.1) cells,P=0.001] and invasion [(29.0±3.5) cells vs.(13.1±3.7) cells,P=0.009] compared to its control group. Moreover the conditioned medium which HepG2 Exosome induced MSC to differentiate into CAF could also promote the expressions of mesenchyme-related genes Smad interacting protein 1(P=0.040),β-catenin(P=0.038),fibronectin(P=0.029),and Vimentin(P=0.013)and inhibit the expression of epithelial related genes zonula ocdudens-1(P=0.010).Conclusions Exosome extracted from HepG2 cells can induce human adipose-derived MSC to differentiate into cancer-associated myofibroblasts. CAF-like cells can promote the migration of the liver cancer cell line HepG2.

Objective To observe the osteogenic effect of tissue-engineered bone constructed by poly-L-lysine-demineralized bone matrix (PLL-DBM) enriched bone marrow stem cells in the space of goat transverse process bone fusion model and explore a new tissue-engineered bone construction method. Methods PLL was used to decorate goat DBM to prepare a matrix material (PLL-DBM). The osteo-genic effect of tissue-engineered bone constructed by PLL-DBM enriched bone marrow cells ( Group Ⅰ A) was detected in goat lumbar intertransverse graft bone model; autogenous iliac bone (Group Ⅰ B), DBM enriched bone marrow (Group Ⅱ C) and DBM (Group Ⅱ D) were used as controls. The osteogenesis of the bones in the fused segments of four groups were compared and evaluated by X-ray, three-dimensional CT, CT value testing and biomechanical testing. Results The results of X-ray showed that the fusion ranges in groups ⅠA and ⅠB were basically the same, which were significantly wider than that in Group Ⅱ, with no fusion detected in Group Ⅱ D. The CT value was (696.76±10275) HU in Group Ⅰ A and (766.03±69.24) HU in Group B, which were significantly higher than that in Group Ⅱ C (P <0.05), but there was no statistical difference in CT value between Groups Ⅰ A and Ⅰ B (P > 0.05). The CT val-ue in Group Ⅱ C was significantly higher than in Group ⅡD (P <0.01). There was no statistical differ-ence between Groups Ⅰ A and Ⅰ B in the maximum load and bending strength (P > 0.05). The maxi-mum load and bending strength in Groups Ⅰ A and Ⅰ B were significantly higher than that in Group Ⅱ C (P < 0.05), and the two indices in Group Ⅱ C were significantly higher than that in Group Ⅱ D (P <0.01). Conclusion Tissue-engineered bone constructed by PLL-DBM enriched bone marrow cells is an ideal tissue engineered bone and its osteogenic potential is similar to that of autologous bone.

OBJECTIVE:To study the antitumor activity of Anthopleura xanthogrammica crude extract on human lung cancer SPC-A1 cells in vitro. METHODS:A. xanthogrammica crude extract obtained by the methods of repeated freezing and thawing,ac-etone precipitation. After treated with crude extract 0(blank control),0.625,1.25 and 2.5 mg/ml for 24,48 and 72 h,the activity of SPC-A1 cells were measured by MTT assay. The growth inhibition rate and IC50 were also calculated. 24 h later,the morphologi-cal changes of SPC-A1 cells were observed by HE staining and AO/EB fluorescence staining. RESULTS:MTT assay showed that A. xanthogrammica crude extract has significant inhibitory effect on the proliferation of human lung cancer SPC-A1 cells;with the increasing of the concentration and the extension of the time,the inhibitory rate was increased. Its 24 h,48 h ,72 h IC50 were 1.81,1.32 and 1.18 mg/ml. HE staining and AO/EB staining appeared obvious morphological changes of apoptosis that cell mor-phology narrowed,vacuoles arose in the cytoplasm,karyopyknosis and part of nuclear disappearance occurred. CONCLUSIONS:A. xanthogrammica crude extract has an inhibitory effect on the proliferation of human lung cancer SPC-A1 cells.

A series of [1,3]dioxolo[4,5-f]isoindolone derivatives were designed, synthesized and evaluated as inhibitors of acetylcholinesterases (AChE). Furthermore, their effects on memory impairment of mice induced by scopolamine were investigated with step-through test. The results suggested that most of the target compounds exhibited potential inhibition on AChE with IC50 values at micromolar range. Compounds I1 (IC50 value of 0.086 μmol · L(-1)) and I2 (IC50 value of 0.080 μmol · L(-1)) showed the strongest AChE inhibitory activity, which are equipotent to donepezil (IC50 value of 0.094 μmol · L(-1)). Moreover, compounds I1-I4 could improve the memory impairment induced by scopolamine in mice.
Animals ; Cholinesterase Inhibitors ; chemical synthesis ; chemistry ; Dioxoles ; chemical synthesis ; chemistry ; Drug Design ; Indans ; Inhibitory Concentration 50 ; Isoindoles ; chemical synthesis ; chemistry ; Memory Disorders ; drug therapy ; Mice ; Piperidines ; Scopolamine Hydrobromide

OBJECTIVETo investigate the expression of motilin and its precursor mRNA in normal human thyroid. To compare the expression differences of motilin and it precursor mRNA between normal thyroid and intestines. To study the expression of motilin and its precursor mRNA in human thyroid tumors and their clinical implications.

METHODSRT-PCR, Southern blot and molecular cloning were used to detect motilin transcript expression in human thyroid and mucous membrane of small intestine. Real-time PCR and immunohistochemical techniques were used to quantify motilin precursor mRNA and motilin peptide in thyroid tissue samples including adenoma, medullary carcinoma, follicular carcinoma, papillary carcinoma and nodular goiter.

RESULTS(1) The expression of motilin and its precursor mRNA in normal human thyroid was primarily in the thyroid C cells. (2) RT-PCR and Southern blot showed that motilin mRNA expressed in human thyroid was identical to that expressed in duodenum with identical sequence deposited in NCBI Genbank of America. (3) Immunohistochemistry, Western blot research and real-time PCR studies showed that motilin and its precursor mRNA were expressed in normal and tumor tissues of human thyroid. Thyroid tumors (acidophilic adenoma, medullary carcinoma, follicular carcinoma, papillary carcinoma and nodular goiter) showed intense and diffuse immunostaining for motilin peptide. Moreover, the expression of motilin and its precursor mRNA in thyroid medullar carcinoma and acidophilic adenoma were significantly higher than those of normal thyroid tissue (P < 0.05). The expression in thyroid follicular and papillary carcinomas were significantly lower than those of normal thyroid tissue (P < 0.05). There was no difference of the expression between nodular goiter and normal thyroid tissue (P > 0.05).

CONCLUSIONSMotilin peptide and its precursor mRNA are expressed in C cells of human thyroid. The sequence of motilin is identical to that expressed in duodenum from NCBI Genbank of America. The expressions of both motilin and its precursor mRNA in thyroid medullary carcinoma and acidophilic adenoma are significantly increased. In contrast, their expressions in thyroid follicular and papillary carcinomas are significantly decreased. Motilin may regulate physiological functions of the thyroid through parafollicular cells. Motilin may be involved in the pathogenesis of medullary carcinoma and acidophilic adenoma of the thyroid.

Adenocarcinoma, Follicular ; genetics ; Adult ; Aged ; Biomarkers, Tumor ; metabolism ; Carcinoma, Medullary ; genetics ; Carcinoma, Papillary ; genetics ; metabolism ; Female ; Humans ; Intestines ; metabolism ; Male ; Middle Aged ; Motilin ; genetics ; metabolism ; Nervous System Neoplasms ; metabolism ; RNA Precursors ; metabolism ; RNA, Messenger ; metabolism ; Thyroid Gland ; metabolism ; Thyroid Neoplasms ; genetics ; metabolism

AIM:To investigate the effects of ox-LDL on TLR2 and TLR4 expression and production of TNF-?,IL-10,IL-12,NO and MDA in macrophages and to observe intervention effect of GW1929 in above procedure.METHODS:The mouse peritoneal macrophages were pretreated with ox-LDL(50 mg/L,100 mg/L)and GW1929(20 ?mol/L)respectively for 24 h.The concentrations of MDA,NO-2/NO-3,TNF-?,IL-10 and IL-12 in the culture fluid were detected.Flow cytometry was used to observe TLR2 and TLR4 expressions after the mouse peritoneal macrophages were pretreated with ox-LDL(50 mg/L)and GW1929(20 ?mol/L)respectively for 6 h,12 h,and 24 h.RESULTS:The concentrations of MDA,NO-2/NO-3,TNF-? and IL-10 in ox-LDL(50 mg/L,100 mg/L)group were higher than those in control and GW1929 group obviously,but the concentrations of above index in ox-LDL(50 mg/L,100 mg/L)+GW1929 group were lower than those in ox-LDL(50 mg/L,100 mg/L)group apparently.No IL-12 in every group was detected.Expressions of TLR-2 in ox-LDL+GW1929(6 h,12 h,24 h)group were lower than those in ox-LDL(6 h,12 h,24 h)group respectively.TLR-4 expressions in ox-LDL+GW1929(12 h)were lower than those in ox-LDL(12 h)apparently.CONCLUSION:ox-LDL up-regulates TLR2 and TLR4 expressions and promotes the production of ROX,NO,TNF-? and IL-10 in macrophages.GW1929 is capable of inhibiting the above ox-LDL effects.

Objective To fabricate an anti?tuberculosis controlled drug release coating with Ti?PDA?PEG?PLGA?INH and to investigate its surface characteristics, in vivo and in vitro drug release behavior, and tissue biocompatibility. Methods 4?arm?polyethylene glycol (PEG) was synthesized first. Then cover the surface of titanium (Ti) with a layer of poly dopamine (PDA) by Michael addition reaction. Use porous starch and 4?arm?PEG as a carrier, load with isoniazid (INH), then attach to the surface of titanium by casting or sol?gel dip coating methods, and then cover with a layer of poly lactic?co?glycolic acid (PLGA) by the same method, to fabricate the Ti?PDA?PEG?PLGA?INH composite coating finally. The functional group of 4?arm?PEG was charac?terized by proton nuclear resonance spectroscopy (HNMR). The surface characteristics of Ti?PDA?PEG?PLGA?INH were evaluated by scanning electron microscope (SEM), while drug release behaviors were detected by high performance liquid chromatography (HPLC) and the cumulative release rate was calculated, and carry out the antibacterial performance in vitro. The animal model of femoral condyle bone defect was established in 25 New Zealand white rabbits. Titanium rods covered with PDA?PEG?PLGA?INH coating were implanted into defect area. INH concentrations were detected by HPLC in venous blood, muscle and bone tissue at each time point postoperatively. Another 12 rabbits were randomly divided into experimental group and control group, the experi?mental group was implanted with titanium tablets and titanium rods coated with PDA?PEG?PLGA?INH in the paraspinous muscle and left femoral condyles respectively, while the control group was implanted with a blank sheet of titanium tablets and titanium rods in the same place. Hematoxylin and Eosin Staining were used to observe the biocompatibility of the composite system in vivo at 28 and 56 days postoperatively. Results Ti?PDA?PEG?PLGA?INH controlled drug release coating uniformly distributed on the surface of plates and rods, with translucent form and smooth surface. In vitro INH release kinetics exhibited a short?burst release during the first 8h, and the cumulative release of the INH was about 65%. On the 9th day, the cumulative release of the INH was about 90%, and then the release tended to be flat, and the drug release behavior in vitro continued more than 20d. In vivo release test showed that the concentration of INH in vein blood, muscle and bone tissue around the composite system was increased steadi?ly postoperatively. On about the 28th day, the concentration reached the max. However, the INH concentrations in muscle and bone tissue around the composite system were still higher than the minimum inhibitory concentration (MIC) on the 56th day. The antibacterial test in vitro showed that the titanium tablets coated with PDA?PEG?PLGA?INH formed obvious bacterial inhibition zones. The pathological results indicated that mild inflammatory reaction was seen in the 4th week postoperatively, and the reac?tive capsule formed with loose connective tissue. In the 8th week postoperatively, there's no obvious inflammation occurred, and the reactive capsule became more dense and thicker. Conclusion The study successfully fabricated the Ti?PDA?PEG?PLGA?INH anti?tuberculosis controlled drug release coating, with reasonable release behavior both in vivo and in vitro, effective antibac?terial effect of Mycobacterium tuberculosis in vitro and good tissue biocompatibility, which is a potentially effective drug delivery system for spinal tuberculosis.

OBJECTIVETo investigate the correlation of vasectomy with the risk of prostate cancer in Chinese men.

METHODSWe systematically searched the databases CNKI, VIP, Wanfang, PubMed, Embase, and Cochrane Library for the literature relating the relationship between vasectomy and the risk of prostate cancer in Chinese males up to December 2014. According to the inclusion and exclusion criteria, two investigators independently selected the eligible publications, evaluated their quality, and extracted relevant information, followed by a meta-analysis with the software STATA 12.0.

RESULTSNine studies were included in the analysis involving 1 202 cases of prostate cancer and 4,496 controls. Random-effect model analysis revealed no statistically significant correlation between vasectomy and the risk of prostate cancer (OR = 1.05; 95% CI 0.62-1.79), with an obvious heterogeneity (P < 0.001, I2 = 85.7%). No significant publication bias was found among the included studies (Egger, P = 0.824; Begg, P = 0.348).

CONCLUSIONThe results of our meta-analysis do not support the association of vasectomy with the increased risk of prostate cancer in Chinese population.

Asian Continental Ancestry Group ; China ; Humans ; Male ; Prostatic Neoplasms ; ethnology ; etiology ; Risk Assessment ; Vasectomy ; adverse effects

OBJECTIVETo elucidate the interference effect of Epigallocatechin-3-Gallate (EGCG) on targets of Activator Protein-1 (AP-1) signal transduction pathway activated by EB virus encoded latent membrane protein 1 in nasopharyngeal carcinoma (NPC) cell lines.

METHODSSurvival rate of cells was determined by MTT assay. AP-1 and CyclinD1 activation were analyzed by promoter luciferase reporter system. Nuclear translocation of JNK was analyzed by indirect immunofluorescence. Protein expression and phosphorylation were observed by Western blot.

RESULTSEGCG inhibited the survival of CNE1 and CNE-LMP1 cells and the activity of AP-1 caused by LMP1 in CNE-LMP1 cells. EGCG also inhibited the nuclear translocation of JNK and the phosphorylation of c-Jun. It also inhibited cyclinD1 promoter activity and cyclinD1 expression.

CONCLUSIONEGCG inhibits AP-1, JNK, c-Jun and cyclinD1 which are key targets on AP-1 signal transduction pathway. The results may explain the molecular mechanism of action of EGCG against nasopharyngeal carcinoma.

Carcinoma, Squamous Cell ; metabolism ; pathology ; virology ; Catechin ; analogs & derivatives ; pharmacology ; Cell Line, Tumor ; Cell Survival ; drug effects ; Herpesvirus 4, Human ; Humans ; JNK Mitogen-Activated Protein Kinases ; metabolism ; MAP Kinase Kinase 4 ; Mitogen-Activated Protein Kinase Kinases ; metabolism ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; virology ; Phosphorylation ; drug effects ; Protein Transport ; drug effects ; Proto-Oncogene Proteins c-jun ; metabolism ; Signal Transduction ; drug effects ; Transcription Factor AP-1 ; metabolism ; Viral Matrix Proteins ; genetics ; metabolism ; physiology