Objective:To explore risk factors for no‐reflow after emergency coronary intervention in aged patients with a‐cute ST elevation myocardial infarction (STEMI) . Methods:According to presence of no -reflow (≤TIMI grade Ⅲwas considered as no-reflow) after operation or not ,a total of 700 aged STEMI patients hospitalized in our hospital during 2010-2013 were divided into no-reflow group (n=190 ,27. 14% ) and reflow group (n=510 ,72. 86% ) . Clinical data , PCI and coronary angiography data were collected ,compared and analyzed between two groups . Results:Compared with reflow group ,there were significant rise in percentages of patients with TIMI grade 0-1 (61.17% vs. 82.11% ) ,coro‐nary collateral blood flow grade 0 (64.12% vs. 74.21% ) ,5 thrombus scores before PCI (58.83% vs. 80.00% );signifi‐cant reduction in systolic blood pressure (SBP) at hospitalization [ (111.2 ± 24.6) mmHg vs. (101.7 ± 25.9) mmHg] in no-reflow group , P<0. 01 all. Multi-factor Logistic regression analysis indicated that SBP<101 mmHg at hospitaliza‐tion ,collateral blood flow grade 0 before PCI and 5 thrombus scores before PCI were risk factors for no‐reflow after emer‐gency PCI (OR=1.006~4.398 , P<0.05 or <0.01) .Conclusion:In aged acute STEMI patients ,those with risk factors for no-reflow after emergency PCI should take corresponding preventive and therapeutic measures in order to improve their prognosis .

Objective To explore the chromosome aberration of cervical cancers induced by human papillomavirus(HPV16)virus.Methods The change of change of chromosomes of Hela cells induced by HPV-16 infection HPV-16 in fection was detected by FISH.Results The integration sites of HPV-16 were not observed in Hela cells.But HPV16 virus was integrated on chromosomes 3.Conclusion HPV16 could cause chromosome 3 aberration in Hela cells and result in the occurance of cervical cancers.

AIM:To investigate the influence of high-mobility group box 1 (HMGB1) on the proliferation of neural stem cells in peri-infarction cortex of focal cerebral ischemia/reperfusion model rats .METHODS: Male SD rats (n=48) were randomly divided into sham group , ischemia/reperfusion (I/R) group, RNA interference group and nega-tive interference group .The rat middle cerebral artery was blocked to establish focal cerebral I /R model ( ischemia for 1 h and reperfusion for 7 d).Lentivirus vector of HMGB1 shRNA was used to suppress the HMGB1 protein expression in the rat brain.The effect of RNA interference was evaluated by the methods of double-immunofluorescence labeling of HMGB 1/GFAP and Western blotting .The proliferation of neural stem cells in the peri-infarction cortex was assessed by double labe-ling of BrdU/nestin.RESULTS: The protein expression of HMGB1 in I/R group was much higher than those in sham group (P<0.05).RNA interference effectively inhibited the HMGB1 expression (P<0.05).Double labeled BrdU/nestin positive cells in I/R group were more than that in sham group (P<0.05).The double labeled BrdU/nestin positive cells were significantly decreased in RNA interference group (P<0.05).CONCLUSION:Focal cerebral ischemia/reperfusion injury promotes the proliferation of neural stem cells in peri-infarction cortex by increasing HMGB 1 protein level .

Objective To investigate Toll-like receptor-4 (TLR4) protein expression in human pancreatic adenocarcinoma,and to evaluate the relationship between TLR4 protein expression and angiogenesis.Methods Sixty-two surgically resected human pancreatic adenocarcinoma specimens and 35 normal para-cancerous tissues were investigated for TLR4 protein expression by immunohistochemical SP methods,and CD31 antibody was used to mark microvascular endothelial cells and determine the microvessel density (MVD).The correlation among TLR4 protein expression and MVD and clinicopathologic features of pancreatic adenocarcinoma were analyzed.Results TLR4 protein positive expression rate and MVD in human pancreatic adenocarcinoma was 74.2％ (46/62) and 47.3 ± 13.5,respectively,which were significantly higher than those in the normal pancreatic tissue [17.1％ (6/35),12.6 ±4.8; P ＜0.01].TLR4 protein positive expression rate in the cases with lymph node metastasis was 83.8％,which was significantly higher than that in the cases without lymph node metastasis (60.0％,P =0.036).TLR4 protein positive expression rate in the patients with stage Ⅲ and Ⅳ of TNM classification was 85.3％,which was significantly higher than that in the patients with stage Ⅰ and Ⅱ (60.7％,P=0.028).MVD was closely related to tumor size,lymph node metastasis and TNM stage of pancreatic adenocarcinoma (P =0.008,0.036,0.010).There was a strong positive correlation between TLR4 protein expression and MVD (r =0.534,P ＜0.01 ).Conclusions TLR4 protein expression is closely related to the development and progression of human pancreatic adenocarcinoma and its potential mechanism is related to the promotion of tumor angiogenesis.

Objective To observe the effect of triptolide combined with gemcitabine on proliferation and apoptosis of pancreatic cancer cells ,and to analyze the relevant mechanisms .Methods After treated with TPL ,GEM or TPL combined with GEM in vitro , PANC-1 cells proliferation was accessed by MTT assay and the interaction between the two drugs was calculated .Apoptotic mor-phological changes and apoptosis rate of the cells were investigated by Hoechst 33258 staining and flow cytometry ,respectively .The expression of signal transduction and transcription factor 3(STAT3) ,cysteine aspartate specific proteases-3(caspase-3) protein were detected by Western blot analysis .Results TPL ,GEM or TPL combined with GEM could significantly inhibit the prolifera-tion of PANC-1 cells ,and the combination of the two drugs had a synergistic effect .The cells of the TPL group ,GEM group ,as well as the combined group showed typical apoptotic morphological changes .Compared with the TPL group and GEM group ,the number of apoptotic cells of the combined group increased significantly .Compared with the control group ,the cells apoptosis rate of the TPL group ,GEM group and combined group was significantly increased (P< 0 .05) ,and the apoptosis rate of the the combined group was significantly higher than that of the monotherapy group(P<0 .05) .TPL combined with GEM synergistically inhibited p-STAT3 protein expression and activated caspase-3 protein expression .Conclusion TPL combined with GEM can synergistically in-hibit proliferation and induce apoptosis of pancreatic cancer PANC-1 cells ,its mechanism is related to the inhibition of STAT 3 sig-naling pathway ,promotion the expression of caspase-3 protein .

The manuscript introduced the overview, training objectives, policy advantages, training process,curriculum, examination of the Australian College in Rural and Remote Medicine and further contrasted that with China's domestics.The authors held that Australia's training is better targeted due to its colleges tailored to this end;the training duration for general practitioners of rural and remote areas is longer,and the training schedule is reasonable;the curriculum design and training content are more targeted;and the homogeneous training is better achieved as its examination is run by the college in a standardized manner.The authors therefore hold that China should develop detailed regulations for general practitioners from rural and remote areas and explore the feasibility of setting up second-level disciplines institutes for internal medicine, surgery, gynecology and obstetrics, pediatrics and general at national and provincial level.

Objective To examine the expression of metastasis-associated in colon cancer 1 (MACC1) gene in ovarian cancer cell lines and investigate its effect on biological behaviors of ovarian cancer cells.Methods The expression of MACC1 was examined by qRT-PCR and Western blot analysis in four ovarian cancer cell lines inculding OVCAR3,ES-2,SKOV3 and HO-8910.When the MACC1 was transfected to OVCAR3 cells,fluorogenic quantitative PCR was used to filter and identify MACC1 gene after the efficient silencing.Changes of adhesion in the cells were analyzed by an adhesion assay.Transwell migration and invasion assay and in vitro vascular mimicry assay were used to detect migration,invasion and angiogenesis of OVCAR3 cells in vitro.Results The expression of MACC1 gene was higher in OVCAR3 compared to other cell lines.qRT-PCR confirmed that the expression of MACC1 was silenced successfully after transient transfected MACC1-siRNA into OVCAR3 cells.After successful silencing the MACC1 expression,the adhesion ability was inhibited to some degree.In transwell migration assay,the numbers of cells in upper chamber passing through the membrane in transfected group were less than control groups (245.5 ±12.8,500.3±16.5 and 496.3±13.1 respectively),while in transwell invasion assay,the numbers of cells in upper chamber passing through the membrane in transfected group were less than the negative group and control group (185.3±14.1,405.7±9.1 and 416.3±11.5 respectively),both with markedly differences among the three groups.In tube formation assay,the distrubition of HUVECs was diffused with less junctions,and the average number of complete tubular structure was decreased in transfected group compared to the corresponding controls.Conclusion RNA interference inhibits the expression of MACC1 and effectively inhibits the metastasis and invasion abilities of ovarian cancer cells in vitro,and MACC1 is expected to become the target gene of ovarian cancer treatment.

Objective:To study the effects of SiO2 nanoparticles on the organs of mice in vivo after intratracheal instillation, and to provide the basis for safety evaluation of SiO2 nanoparticles. Methods:Forty female BALB/c mice aged 6-8 weeks were randomly divided into control group (saline), low dose of SiO2 group (7 mg·kg-1), middle dose of SiO2 group (21 mg·kg-1), and high dose of SiO2 group (35 mg·kg-1).1 and 15 d after five times of non-exposed intratracheal instilation infection (once every 3 d), the mice were sacrificed and the left lungs,the right kidneys, livers, hearts and spleens were collected and embedded in paraffin.The morphology of tissue sections was observed under light microscope after hematoxylin-eosin (HE) staining.The eyeball blood was obtained and the biochemical indicators of liver and kidndy functions were detected.Results:Compared with control group, there were alveolar interval thickening, inflammatory cell infiltration, and a small amount of small arterial thrombosis in the lungs;granulomatous inflammatory cell infiltration and a small amount of focal necrosis of liver cells in the livers;red pulp enlargement, hyperemia, and more visibly scattered megakaryocytes in the spleens in SiO2 nanoparticles groups in a dose-dependent manner, especially in middle and high doses of SiO2 groups.After 15 d of injection, the damages alleviated with the prolongation of time.There was some inflammatory cell infiltration in the kidney tissue of the mice in SiO2 nanoparticle groups.The biochemical indicator detection results showed that alanine aminotransferase(ALT) and aspartate transaminase(AST) levels in SiO2 nanoparticles groups varied, suggesting the liver cell damages were at different degrees;the changes of urea nitrogen(BUN) and creatinine(Cr) levels in SiO2 nanoparticle groups remindered the kidney function alteration, but there were no obvious dose-and time-dependent effects.Conclusion:Intratracheal instillation of SiO2 nanoparticles can influence the major organs of the mice and mainly displays in the inflammation and injuries in the lung, liver, and spleen.

A novel targeting drug carrier (FA-BO-PAMAM) based on the PAMAM G5 dendrimer modified with borneol (BO) and folic acid (FA) molecules on the periphery and doxorubicin (DOX) loaded in the interior was designed and prepared to achieve the purposes of enhancing the blood-brain barrier (BBB) transportation and improving the drug accumulation in the glioma cells. 1H NMR was used to confirm the synthesis of FA-BO-PAMAM; its morphology and mean size were analyzed by dynamic light scattering (DLS) and transmission electron microscope (TEM). Based on the HBMEC and C6 cells, cytotoxicity assay, transport across the BBB, cellular uptake and anti-tumor activity in vitro were investigated to evaluate the properties of nanocarriers in vitro. The results showed that the nanocarrier of FA-BO-PAMAM was successfully synthesized, which was spherical in morphology with the average size of (22.28 ± 0.42) nm, and zeta potential of (7.6 ± 0.89) mV. Cytotoxicity and transport across the BBB assay showed that BO-modified conjugates decreased the cytotoxicity of PAMAM against both HBMEC and C6 cells and exhibited higher BBB transportation ability than BO-unmodified conjugates; moreover, modification with FA increased the total uptake of DOX by C6 cells and enhanced the cytotoxicity of DOX-polymer against C6 cells. Therefore, FA-BO-PAMAM is a promising nanodrug delivery system in employing PAMAM as a drug carrier and treatment for brain glioma.
Biological Transport ; Blood-Brain Barrier ; Bornanes ; chemistry ; Cell Line, Tumor ; Dendrimers ; Doxorubicin ; pharmacology ; Drug Carriers ; chemistry ; Drug Delivery Systems ; Folic Acid ; chemistry ; Glioma ; Humans

Objective To investigate whether there is amyloid fibers in the mature neutrophils and to reveal the molecular mechanism of the formation of AD amyloidosis. Method Thirty cases of AD patients and 30 healthy control were enrolled. The white blood cell, the red blood cell,hemoglobin and neutrophil absolute value were determined by Sysmex X5-500i hematology analyzer. The neutrophils and amyloid variable specific probe affinity were measured, The starch like variable fluorescence intensity in plasma was dtected by the sulfur T (Thioflavin T, ThT) method. Results The affinity test results showed that the amyloidosis fluorescent probe (ThT) can be combined with tissue amyloid fibers specifically. The neutrophil amyloid fibers staining also showed a positive reaction. Compared with the AD group, no significant differences were found in white blood cell, red blood cell, hemoglobin and neutrophil absolute value level in the healthy control group The serum amyloid variable fluorescence intensity in the AD group was significantly higher than that in the control group (P < 0.05). Conclusion The amyloid fibers was found in the mature neutrophils, and the level of plasma amyloid fibers was significantly increased in the AD patients.