ABSTRACT:Objective To prepare polymeric nanomicelles capable of simultaneously loading doxorubicin (DOX) and Bcl‐2 small interfering RNA (Bcl‐2 siRNA ) , and to explore their in vitro cytotoxicity and cellular uptake in MCF‐7 human breast cancer cells .Methods Copolymer poly (ethylene glycol )‐g‐polyethylenimine‐g‐poly(γ‐benzyl‐L‐glutamate) was synthesized by the combination of reductive amination and carbodiimide methods , and its chemical structure was verified by 1 H NMR .Empty and drug‐loaded copolymeric nanomicelles were prepared by dialysis method and characterized by transmission electron microscope and dynamic light scattering .The ability of the nanomicelles to compress Bcl‐2 siRNA was measured by by agarose gel electrophoresis method . The release profiles of DOX and Bcl‐2 siRNA from the nanomicelles were explored by means of fluorescence spectrometry and dialysis method .The in vitro cytotoxicity and cellular uptake of DOX and Bcl‐2 siRNA co‐loaded nanomicelles in MCF‐7 human breast cancer cells were characterized by MTT assay and confocal laser scanning microscopy , respectively .Results The critical micelle concentration of the copolymer was about 4 mg/L ,and the sizes of self‐assembled empty and drug‐loaded nanomicelles were smaller than 200 nm .The drug‐loading efficiency and drug‐loading content of DOX in the nanomicelles were 88 .7% and 15 .1% ,respectively .The DOX‐loaded nanomicelles could efficiently compress Bcl‐2 siRNA when an N/P ratio was ≥64 .The zeta potential of DOX and Bcl‐2 siRNA co‐loaded nanomicelles was +30 mV .The release behavior of the cargoes from the nanomicells was pH‐sensitive , and the release of Bcl‐2 siRNA was more sensitive to acidic pH than that of DOX . The nanomicelles could simultaneously deliver DOX and Bcl‐2 siRNA into MCF‐7 cells , and the co‐delivered DOX and Bcl‐2 siRNA significantly increased the cytotoxicity of DOX (P<0 .05) .Conclusion The polymeric nanomicelles can co‐load DOX and Bcl‐2 siRNA and deliver them into MCF‐7 cells , and DOX in combination with Bcl‐2 siRNA can synergistically inhibit the growth of MCF‐7 cells and promote cell apoptosis ,suggesting that the nanomicells may be a promising carrier for the co‐delivery for chemotherapeutics and genes .

Objective The aim of this study is to evaluate clinical outcomes of patients with acute type A intranural hematoma of the aorta(IMH) received surgical treatment.Methods We analyzed 40 consecutive patients with acute type A aortic IMH in Fuwai hospital.The patients are from 2012.1.1 to 2015.12.31.The average age of patients is(56 ± 11) years.Clinical outcomes and morphological evolution by CT were analyzed for 2 years.Results Most of the patients were treated medically during their initial hospitalization.There were 2 patients died in in-hospital and no 2-year mortality.16 patients (40％) were received acute surgery,24 patients(60％)were received normal surgery.Conclusion Surgical treatment would be a favorable treatment option in type A acute IMH.

Humans ; Lymphoma, B-Cell ; diagnosis ; Prognosis

ObjectiveTo describe the novel variants of the Smqnr family of quinolone resistance genes and their distribution in clinical isolates of Stenotrophomonas maltophilia, and investigate the relationship between Smqnr and quinolone resistance. MethodsThe identification of 442 strains of Stenotrophomonas maltophilia were performed by VITEK automated identification and susceptibility. Minimum inhibitoryconcentrationsof tigecycline,chloramphenicol,ceftazidime,compoundsulfamethoxazole,ticarcillin/clavulanic acid, levofloxacin and moxifloxacin against Stenotrophomonas maltophilia were detected by standard agar dilution method. Full length of Smqnr gene was amplified by polymerase chain reaction (PCR) and sequenced. DNAMAN software was used to compare the sequence divergence and construct the genealogical tree to analyze the phylogenetic relationships of Smqnr family. Results Stenotrophomonas maltophilia was resistant to the 7 kinds of clinical antibiotics in various extent ( from 5％ to 50％ ). Levofloxacin showed s good antibacterial activity with the resistance rate of 6. 11％ (27/442), nevertheless the best was moxifloxacin with the resistance rate of 5. 88％ (25/442). Smqnr gene was detected in 114 of 442 strains of Stenotrophomonas maltophilia[25.79％ (114/442)], including 11 known genes and 20 novel variants of the Smqnr genes ( Smqnr28-47 ) which was caused by several genes mutation changing the translation of 219 amino acids. The gene detection rate of resistant, intermediate and sensitive strains was 42. 30％ (11/26), 34. 37％ (11/32) and 23.95％ (92/384), respectively. The Smqnr gene harbored the highest detection rote (37. 78％ ) in the sensitive strains of Stenotrophomonas maltophilia with minimal inhibitory concentration of 0. 125 μg/ml. Conclusions The gene coding region of Smqnr is highly polymorphic and the novel variants of Smqnr gene are caused by several genes mutation changing the translation of 219 amino acids. Smqnr gene in Stenotrophomonas maltophilia has a high detection rate and different distribution.

ObjectiveTo investigate the association of lipid ratios with diabetes and pre-diabetes in residents aged 35-75 years in Changzhou City. MethodsA multistage whole-group random sampling method was used to survey permanent residents aged 35-75 years in Tianning and Wujin districts of Changzhou City， and the study data were obtained by questionnaires， physical examination and laboratory tests. The relationship between lipid ratios and diabetes and pre-diabetes was analyzed by dichotomous logistic regression method. ResultsThe prevalence of diabetes in the surveyed population in Changzhou was 18.69%， and the prevalence of pre-diabetes was 10.53%. In the total population， the risk of pre-diabetes was significantly increased in the highest TC/HDL-C， TG/HDL-C and LDL-C/HDL-C groups， by 68%， 93% and 38%， respectively； the risk of diabetes was also significantly increased in the highest TC/HDL-C， TG/HDL-C and LDL-C/HDL-C groups， by 105%， 149% and 78%， respectively. The risk of diabetes was also significantly increased in the highest TC/HDL-C， TG/HDL-C and LDL-C/HDL-C groups， by 105%， 149% and 78%， respectively. All three lipid ratios increased in women compared to men， leading to a stronger association with increased risk of diabetes and pre-diabetes. ConclusionLipid ratios TC/HDL-C， TG/HDL-C， and LDL-C/HDL-C were correlated with the risk of diabetes and pre-diabetes in people aged 35-75 years， with TG/HDL-C having the strongest association with diabetes and pre-diabetes， and is expected to be a key predictor for assessing the development of diabetes.