2,4,6-Trinitrotoluene (TNT) and its by-products dinitrotoluene (DNT) pose a significant threat to human health and other living organisms.However, the conventional analytical methods involved in bulky and expensive instruments are complicated and time-consuming, impeding quick and on-line determination.In this work, a facile yet effective strategy of utilizing UV-vis spectroscopy coupled with partial least squares (PLS) was proposed, through which TNT and two isomers of DNT (2,4-DNT and 2,6-DNT) in nature water could be rapidly and simultaneously determined without any pre-separation.Variable combination population analysis (VCPA) was utilized to select important feather variables and significantly improved the predictive performance of the PLS model.The calibration set contained 25 samples constructed by orthogonal array design (OAD).The predictive ability of the models was validated by an independent prediction set including 15 samples, achieving up to 0.99 of the determination coefficients (R2) for each of the analytes.The optimized models were successfully applied to determine the 3 ingredients in 8 environmental samples involving in tap, lake and two kinds of river water with the recovery values of great than 97%.Finally, the proposed method was further validated by high performance liquid chromatography method.UV-vis spectroscopy coupled with chemometrics may be used as simple and effective strategy with high potential in environmental monitoring.

12E7 Antigen ; Adult ; Antigens, CD ; metabolism ; Cell Adhesion Molecules ; metabolism ; Chondrosarcoma, Mesenchymal ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Hemangiopericytoma ; pathology ; Humans ; Lymphoma ; pathology ; Male ; Nasal Cavity ; Neuroectodermal Tumors, Primitive ; pathology ; Nose Neoplasms ; metabolism ; pathology ; surgery ; Vimentin ; metabolism ; Young Adult

Objective To investigate the efficacy,safety of allogeneic hematopoietic stem cell transplantation(Allo-HSCT)in lupus mice.Methods22BXSB was pre-treated with myleran and cyclophosphamide,12BXSB were treated with CTX and prednisone as the control group.Peripheral blood stem cells of doner mouse(C57BL/6)after mobilizing with G-CSF were infused into recipients after pretreatment.Hematopoietic and immune reconstitution after transplantation were measured by blood cell analysis and flowcytometry.Recipients' renal pathological changes were measured with direct immunofluorescence after transplantation,proteinuria and anti-dsDNA antibody were also determined.Complications and mortality were compared between the two groups.Recipients'genetic map was analysed with PCR.Results Recipients'complete chimerism was observed after60days of transplantation.The lowest value of WBC declined to0.2?0.1?10 9 /L in Allo-HSCT group.The duration of WBC increased from the lowest value up to1.0?10 9 /L was47.5?12.8d in Allo-HSCT group.Early immune reconstitution could not be found in Allo-HSCT group.After transplantation reduction of proteinuria occurred in95.5%BXSB,anti-ds-DNA antibody turned to negative in54.5%BXSB,decrease of kindey immunofluorescence in90.9%BXSB,there was a significant difference between the two groups.There was no significant difference in the incidences of complication of bleeding,pneumonia and mortality between the Allo-HSCT group and the control group.Conclusions Allo-HSCT is an effective treatment method for lupus mice.It may be helpful in improving proteinuria and anti-dsDNA antibody and renal pathological changes of lupus mice.But the incidences of complication and mortality related to transplantation in Allo-HSCT group are higher than those in control group,so the value of Allo-HSCT in the treatment lupu mice has to be further studied.

Objective To explore the significance of nuclear factor-?B(NF-?B)activation in peripheral blood mononuclear cells(PBMC)during acute Kawasaki disease(KD).Methods Peripheral blood was collected from children with acute KD(n=30)and healthy age-matched children(n=20).PBMC were cultured in vitro and divided into 3 groups:naturally cultured blank control group,protein kinase C(PKC)activator stimulated phorbol 12-myristate 13-acetate(PMA)group and PMA plus NF-?B inhibitor treated PMA plus pyrrolidine dithiocarbamate(PDTC)group.Percentages of NF-?B activation were detected by immunohistochemistry.Results Under natural culturing,the percentage of cells with activated NF-?B was significantly higher in acute KD blank control group than that in healthy blank control group.The percentage of cells with activated NF-?B was significantly higher in acute KD PMA group than that in acute KD blank group and that in normal control PMA group,respectively(Pa0.05).Conclusions NF-?B activation in PBMC during acute KD is markedly increased,which suggests that NF-?B activation plays an important role in the formation of vasulitis and CAL in this disease.NF-?B activation in PBMCs in children with KD is regulated by the PKC signaling pathway and PDTC obviously inhibits the activation of NF-?B.J Appl Clin Pediatr,2009,24(1):35-37

Microvesicles (MVs) are the heterogeneous mixtures of vesicles. MVs released by leukemia cells constitute an important part of the leukemia microenvironment. MVs might act as important reservoirs of microRNAs (miRNAs). It is worth evaluating whether MVs possess some unique miRNA contents that are valuable in understanding the pathogenesis. In this study, we investigated the miRNA expression patterns of Nalm-6-derived MVs, Jurkat-derived MVs and normal cell-derived MVs using miRNA microarrays. The potential target genes regulated by differentially expressed miRNAs were also predicted and analyzed. Results demonstrated that 182 miRNAs and 166 miRNAs were differentially expressed in Nalm-6-MVs and Jurkat-MVs, respectively. Many oncogenes, tumor suppressors and signal pathway genes were targeted by these aberrantly expressed miRNAs, which might contribute to the development of B-ALL or T-ALL. Our findings expanded the potential diagnostic markers of ALL and provided useful information for ALL pathogenesis.

Immuno-fluorescence technique can qualitatively determine certain nuclear translocation, of which NF-κB/ p65 implicates the activation of NF-κB signal pathways. Immuno-fluorescence analysis software with independent property rights is able to quantitatively analyze dynamic location of NF-κB/p65 by computing relative fluorescence units in nuclei and cytoplasm. We verified the quantitative analysis by Western Blot. When we applied the software to analysis of nuclear translocation in lipopolysaccharide (LPS) induced (0. 5 h, 1 h, 2 h, 4 h) primary human umbilical vein endothelial cells (HUVECs) , we found that nuclear translocation peak showed up at 2h as with calculated Western blot verification results, indicating that the inventive immuno-fluorescence analysis software can be applied to the quantitative analysis of immuno-fluorescence.
Active Transport, Cell Nucleus ; Cell Nucleus ; metabolism ; Cytoplasm ; metabolism ; Fluorescent Antibody Technique ; Human Umbilical Vein Endothelial Cells ; Humans ; NF-kappa B p50 Subunit ; metabolism ; Software

Objective To investigate the effects of lanthanum chloride on proliferation and migration activity of human cervical cancer cells in vitro which may be a new anti-cervical cancer drug and provide experimental data for cervical cancer treatment. Methods HeLa cells cultured in vitro were divided into two groups: experimental group and control group. In experimental group, the cells were respectively treated with lanthanum chloride at different concentrations, 5, 50 and 100 μmol/L, while the cells in the control group were not treated with lanthanum chloride. The cell growth was observed by inverted microscope and the morphology changes of the cells were observed by the laser scanning confocal microscope (LSCM).Proliferation of HeLa cells in the two groups was detected by methyl thiazolyl tetrazolium (MTT) test;apoptosis rate was analyzed by flow cytometry (FCM). Cell migration test was applied to observe the effect of lanthanum chloride on migration. Reverse transcription (RT)-PCR was employed to evaluate the effects of lanthanum chloride on proliferation gene (cyclinD1), anti-apoptosis gene (zinc finger protein A20) and migration-related gene (matrix metalloproteinase 9, MMP-9). Results The status of cell growth was observed under the inverted microscope: with the increased of the lanthanum chloride concentrations, the cell density of reduced, the granule in cytoplasm increased, color intensifying and intercellular space enlarged; some cells became rounding and dead, floating in the culture media; the exfoliated cells increased gradually in the experimental groups. While In the control group, the cells grew adherently, with clear morphology and plump cytoplasm, and adjacent cell grew in lamellar. Observed with LSCM: the nuclear chromatin condensated and marginated with the volume of nuclear decreased in experimental groups. With the increase of the lanthanum chloride concentrations, nuclei in the experimental groups became pyknotic and then underwent karyorrhexis. However, the nuclear of the cells in control group were inact. The growth inhibition rates of lanthanum chloride groups (5, 50, 100 μmol/L) were 24%, 51% and 78%,respectively, in which each was significantly higher than that of the control group (P < 0. 05); the apoptosis rates of lanthanum chloride group were (4. 91 + 0. 39) %, (7. 30 + 0. 71) % and (13.48 + 0. 92) %,respectively, which were all significantly higher than that of the control group [(0. 89 + 0. 11) %, P <0.01]. The migration ability of the cells was also decreased by the treatment of lanthanum chloride, the number of migrated cells in lanthanum chloride groups were 22.2±4. 3, 12. 0±3.2 and 7. 8±2. 6 respectively, which were all significantly lower than that of the control group (41.2±5.4, P < 0. 01). The expression of genes of cyclinD1, A20 and MMP-9, were all decreased by the treatment of lanthanum chloride in a dose-dependent manner. Conclusion Lanthanum chloride can inhibit the proliferation and migration of cervical cancer cells, and induce apoptosis by down-regulating cyclinD1, A20, and MMP-9 expressions in vitro.

Objective To evaluate the application value of polymerase chain reaction (PCR)-fluorescence probe method in identifying genotypes of hepatitis C virus (HCV).Methods One hundred and sixty six serum samples from patients with chronic HCV infection were collected nationwide from March to June 2016.HCV Core-E1 gene region was amplified and sequenced by nested reverse transcription-PCR (RT nested-PCR)and genetic subtypes were analyzed by phylogenetic tree,meanwhile HCV genotypes were also determined by PCR-fluorescent probe method.Kappa test was used to compare the consistency of two methods.Results Among 166 samples detected by RT nested-PCR,the genotype of 66 samples (39.8%) was 1 b,34 (20.5%)was 2a,16 (9.6%)was 3a,27 was 3b (16.2%),23 (13.9%)was 6a.Two samples with 3b genotype detected by RT nested-PCR were identified as 1 b by PCR-fluorescent probe.The consistency rate of two methods was 98.7% (164 /166),there was no significant difference between two methods (χ2 =0.0492,P >0.05).Conclusion PCR-fluorescence probe method can accurately identify HCV genotypes and can be used in clinic.

Objective To analyze the characteristics of auditory verbal memory impairment in mild Alzheimer's Disease (AD) and Mild Cognitive Impairment (MCI).Methods Auditory verbal memory test was performed in 72 patients with MCI,45 patients with mild AD,and 62 normal controls.Results Significant intergroup differences were found in total former five free recall and learning scores,The MCI subjects( 16.4?5.5,2.6?1.7)performed significantly more poorly than the normal control subjects(NC) (30.2?5.6,3.4?1.9),and mild AD categories (9.8?4.1,2.0?1.2) showed lower results than the MCI subjects(t=2.26,P

Objective To investigate the value of endoscopy combined with laparoscopy in the treatment of colorectal polyps and polyp canceration.Methods Different combinations of endoscopic and laparoscopic procedures were employed and the clinical efficacies were compared.Results From January 2004 to September 2006,46 cases with colorectal polyp were treated with endoscopy combined with laparoscopy.Among them,5 cases(10.87%)underwent laparoscopic-assisted endoscopic polypectomy,30(65.22%)endoscopic-assisted laparoscopic resection,6(13.04%)synchronously endoscopic and laparoscopic resection.Five cases were performed further operation after endoscopic polypectomy.According to the pathological findings,21(45.7%)were proved to be polyp canceration,among which 6 were advanced carcinoma,and 3 were found metastasis to the lymph nodes.Among the 41 cases of laparoscopic resection,there was no conversion to an open surgery.Anastomotic leakage was found in 2 cases and anastomotic bleeding in 1.In the 5 cases of laparoscopic-assisted endoscopic polypectomy,no complication was observed.During the period of follow-up(1 to 21 months),no recurrence was detected.Conclusion Endoscopy combined with laparoscopy extends the safety and indications of endoscopic polypectomy,and is minimally invasive to the patients.It is an ideal procedure in the treatment of colorectal polyps and poly carceration.