Calcium Channel Blockers ; pharmacology ; Cell Survival ; drug effects ; Drug Antagonism ; Humans ; Kidney ; cytology ; drug effects ; Lead ; toxicity

OBJECTIVEPrader-Willi syndrome (PWS) is an example of a human genetic disorder that involves imprinting genes on the proximal long arm of chromosome 15 and SNRPN gene as a candidate gene for this syndrome. The purpose of this study was to show the molecular genetic defects and genomic imprinting basis in Chinese PWS patients and to evaluate the clinical applications of a differential diagnostic test for PWS.

METHODSFluorescence in situ hybridization (FISH) and methylation-specific PCR (MSPCR) techniques were applied for 4 clinically suspected PWS patients. Using three probes, including SNRPN probe for identification of the critical locus in PWS region, D15Z1 and PML control probes for identification of the 15p arm and 15q arm, the authors detected the deletions 15q in PWS. MSPCR was based on sodium bisulfite treatment of DNA and PCR primers specific for the maternal and paternal allele.

RESULTSWhen hybridized with mixed probes, it was found in 2 patients that the central specific signal was absent, but both the flanking control signals were retained, indicating SNRPN gene deletion of chromosome 15q11-13. Bisulfite-modified DNA from all PWS children amplified with methylated allele-specific primer pair showed only maternal 131bp PCR product, indicating the maternal uniparental disomy (UPD15).

CONCLUSIONGenomic imprinting plays an important role in the molecular pathogenesis of PWS that caused by paternal microdeletions of 15q11-q13 or maternal UPD of chromosome 15. The basic defect seemed to be an absence of function of PWS genes that are normally expressed only from the paternal chromosome 15. MSPCR is a rapid and simple PCR-based assay compared with other cyto-molecular tests and its results were consistent with the clinical diagnosis of PWS, so it seems to be a reliable diagnostic method for PWS patients who show abnormal methylation at SNRPN. The genetic differential tests for PWS are important in determining familial recurrence risk.

Adolescent ; Autoantigens ; Chromosome Deletion ; Chromosomes, Human, Pair 15 ; genetics ; Gene Deletion ; Genomic Imprinting ; genetics ; Humans ; In Situ Hybridization, Fluorescence ; Male ; Polymerase Chain Reaction ; methods ; Prader-Willi Syndrome ; genetics ; Ribonucleoproteins, Small Nuclear ; genetics ; snRNP Core Proteins

AIMTo establish separation methods of five sulfonamides by using capillary high performance liquid chromatography(mu-HPLC) and electrochromatography. The effect of mobile phase varies such as methanol content, pH, buffer solution concentration and voltage on their chromatographic behavior and electroosmesis flow was investigated. Capillary electrochromatography (CEC) was compared with mu-HPLC at the same condition.

METHODSStationary phase was ODS, mobile phase was methanol and 2 mmol.L-1 H3PO4 buffer solution (pH 3.0-7.0), voltage was 0- -15 kV, flow rate was 10 microL.min-1, pressure was approximately 70 MPa and UV detection wavelength was 254 nm.

RESULTSSeparations on base line have been respectively accomplished for five sulfonamides by mu-HPLC with mobile phase of methanol-2 mmol.L-1 H3PO4 buffer solution (30:70) at pH 5.0 in 67 min, and CEC with the same mobile phase at -5 kV voltage in 25 min.

CONCLUSIONElectroosmesis flow of CEC decreased with the increase in methanol content, buffer solution concentration, increased with the increase in voltage and increase slightly with the increase in pH of mobile phase. Retention values (k) of solutes to be examined decreased with increasing methanol content of mobile phase in mu-HPLC and CEC. Retention values (k) of solutes increased slightly with increasing buffer solution concentration, decreased with increasing voltage in CEC. Trimethoprim(TMP) decreased obviously with increasing voltage in CEC. The effect of pH of mobile phase on retention values (k) was more complex. Five sulfonamides were separated at the same mobile phase condition by mu-HPLC and CEC. And separation speed of CEC was much faster than that of mu-HPLC. CEC was very fit for rapid separation of sulfonamides.

Anti-Infective Agents ; isolation & purification ; Buffers ; Chromatography, High Pressure Liquid ; methods ; Chromatography, Micellar Electrokinetic Capillary ; methods ; Hydrogen-Ion Concentration ; Sulfonamides ; isolation & purification ; Trimethoprim ; isolation & purification

Objective To explore protective effect of Heme oxygenase-1(HO-1) on irradiation-induced endothelial cell apoptosis.Methods Human endothelial cell line EA.hy926 were administered with or without HO-1 activator Copp and/or HO-1 inhibitor Znpp,respectively.Then,cells were treated with or without 8 Gy radiation.The HO-1 protein expression of cells were assessed with Western blotting and apoptosis of cells treated with irradiation were evaluated with flow cytometry.Moreover,cytochrome C releasing into cytosol were also determined by Western blotting. Results In PBS+R group,HO-1 protein expression of EA.hy926 was low posterior to irradiation.When cells were preconditioned with Copp and/or Znpp,then recieved with 8Gy irradiation,the HO-1 protein expression of EA.hy926 increased significantly in comparision with the PBS+R group(P

OBJECTIVETo investigate the prognostic predictors of nasal NK/T cell lymphoma.

METHODSThe clinicopathologic feature data of 61 patients with nasal NK/T cell lymphoma proven by pathological examination from Jan. 1997 to Jan. 2005 were collected. Expression of survivin, CD44, nm23, p53, Ki-67, MDR-1 and CD95 was detected by immunohistochemical staining in 30 patients with available histologic specimens. The correlation between these factors and prognosis were analyzed.

RESULTSIn univariate analysis, performance status, LDH level, clinical stage, initial treatment response, CD56, Ki-67 and CD95 were found to be the prognostic factors associated with time to progression (TTP) in nasal NK/T cell lymphoma, while the performance status, B symptoms, LDH level, initial treatment response, Ki-67 and CD95 were demonstrated as prognostic factors related to overall survival. In multivariate analysis, clinical stage, initial treatment response and performance status were independent prognostic factors for TTP, while the latter two factors were independent prognostic factors of overall survival.

CONCLUSIONClinical stage and initial treatment response, and performance status are found to be independent prognostic factors for TTP, whereas the latter two factors are demonstrated as independent prognostic factors of the overall survival. Overexpression of Ki-67 may be an unfavorable prognostic factor, but overexpression of CD95 may be a favorable one.

Adolescent ; Adult ; Aged ; Analysis of Variance ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Biomarkers, Tumor ; analysis ; Cyclophosphamide ; therapeutic use ; Doxorubicin ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Hyaluronan Receptors ; analysis ; Immunohistochemistry ; statistics & numerical data ; Inhibitor of Apoptosis Proteins ; Ki-67 Antigen ; analysis ; Killer Cells, Natural ; drug effects ; metabolism ; pathology ; Lymphoma, T-Cell ; drug therapy ; metabolism ; pathology ; Male ; Microtubule-Associated Proteins ; analysis ; Middle Aged ; Neoplasm Proteins ; analysis ; Neoplasm Staging ; Nose Neoplasms ; drug therapy ; metabolism ; pathology ; Prednisone ; therapeutic use ; Prognosis ; Proportional Hazards Models ; Vincristine ; therapeutic use ; fas Receptor ; analysis

OBJECTIVETo study the signal roles of protein tyrosine kinase (PTK) on proliferation and collagen synthesis of fibroblasts derived from hypertrophic scar(HS-FB) and normal skin (NS-FB) by interferon-gamma (IFN-gamma) or transforming growth factor beta1 (TGF-beta1).

METHODSHS-FB and NS-FB were cultured and passaged in Dulbecco's modified Eagle's medium(DMEM). The PTK activity in unstimulated or IFN-gamma or TGF-beta1-stimulated HS-FB and NS-FB (10,30,60 and 120 min) were assayed by phosphorus (32P) incorporation. Cell proliferation was determined with MTT stain. The type III procollagen was measured by radioimmunoassay.

RESULTSTGF-beta1 did not change PTK activity but it increased predominately proliferation and collagen synthesis of HS-FB and NS-FB in time-dependent fashion. Genistein, an inhibitor of PTK, inhibited HS-FB and NS-FB to proliferate and synthesize collagen but it could not change the roles on proliferation and collagen synthesis by TGF-beta1. IFN-gamma activated transiently PTK (P < 0.05) and increased proliferation and collagen synthesis of both fibroblast (P < 0.05, at 30 min, 60 min). As the recovery of PTK activity, the proliferation and collagen synthesis were inhibited by IFN-gamma at 120 min. Furthermore, Genistein abrogated the transient increased roles and partly reversed the longterm inhibitory functions by IFN-gamma (P < 0.05) . There were no difference on PTK activity, proliferation and collagen synthesis between HS-FB and NS-FB.

CONCLUSIONSPTK did not mediate the signal of TGF-beta1 but transduced the signal of transient increased roles of IFN-gamma. Inhibited or activated PTK might mediate the signal of decreasing or increasing proliferation and collagen synthesis of fibroblast.

Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Cicatrix, Hypertrophic ; metabolism ; pathology ; Collagen ; biosynthesis ; Dermis ; metabolism ; Fibroblasts ; cytology ; metabolism ; Humans ; Interferon-gamma ; pharmacology ; Protein-Tyrosine Kinases ; metabolism ; Signal Transduction ; Transforming Growth Factor beta1 ; pharmacology ; Wound Healing

OBJECTIVETo explore the feasibility and short-term efficacy of laparoscopic-assisted D3 lymph node dissection for right colon cancer with a medial-to-lateral approach.

METHODSClinical data of 61 patients with right colon cancer undergoing D3 lymph node dissection from March 2006 to June 2010 were analyzed retrospectively. Among them,29 underwent laparoscopic-assisted right hemicolectomy (LARH group) and 32 underwent open right hemicolectomy (ORH group). The number of lymph node harvest, operative details, and complication rate were compared between the two groups.

RESULTSThe mean number of lymph node harvest did not differ significantly between the two groups (16.9±3.8 vs. 15.4±3.6). As compared to ORH group, although the operative time was significantly longer [(214.4±37.9) min vs. (193.3±28.8) min] in LARH group, the mean blood loss [(83.4±38.0) ml vs. (192.7±43.6) ml], time to first flatus [(44.6±20.8) h vs. (70.4±80.0) h], time to resumption of soft diet[(32.5±10.6) h vs. (59.7±10.4) h], and postoperative hospital stay [(11.2±2.2) d vs. (13.8±2.8) d] were more favorable(all P<0.05). Complication rate was lower in LARH group(10.4% vs. 9.4%), however the difference was not statistically significant.

CONCLUSIONSLARH with D3 lymph node dissection is oncologically comparable with ORH for right colon cancer. It is a safe and feasible procedure associated with rapid postoperative recovery.

Aged ; Colectomy ; methods ; Colonic Neoplasms ; surgery ; Female ; Humans ; Laparoscopy ; Lymph Node Excision ; methods ; Male ; Middle Aged ; Retrospective Studies ; Treatment Outcome

AIMTo establish a simple, rapid and accurate electroanalytical method for water soluble porphyrin meso-tetrakis-(4-sulfonatophenyl) porphyrin (TPPS4); to clarify the reaction between water soluble porphyrins and bovine serum albumin (BSA); and to determine the interaction of TPPS4 with BSA in the absence of presence of cyclodextrins (CDs), separately.

METHODSThree methods including LSV, UV spectroscopy and fluorescence spectroscopy had been employed to the relevant experiments. The way of employing three methods at the same time could make the experiment results more reliable.

RESULTSIn the supporting electrolyte of NaH2 PO4-Na2 HPO4 (pH 7.18), a sensitive reduction peak of TPPS4 was found by linear sweep voltammetry (LSV), the peak potential (Ep) was -0.70 V (vs SCE). The relationship between the second derivative peak of LSV (ip") and the concentration of TPPS4 was linear from 1.0 x 10(-7) mol x L(-1) to 1.0 x 10(-5) mol x L(-1), the square of correlation coefficients (r2) were 0.998 3 and 0.999 3, respectively. The relative standard deviation (RSD) was 0.56% (n = 5). The mean recovery of TPPS4 was 99.59%. In NH4Cl-NH3 x H2O buffers (pH 9.05), it was proved that BSA and TPPS4 could interact with each other and form 1 : 1 TPPS4-BSA supramolecular system. Moreover, the interaction between TPPS4 and BSA had been investigated by adding cyclodextrins (CDs). The interaction of TPPS4 with BSA was facilitated both by hydroxypropyl-beta-CD (HP-beta-CD) and sulforbutylether-beta-CD (SBE-beta-CD).

CONCLUSIONAn electroanalytical method for TPPS4 has been established by LSV. The porphyrin drugs included by CDs could react with protein existing inside the human body easier. The consequences of this article also show that CDs will play important role in controlling and releasing the porphyrin drugs.

2-Hydroxypropyl-beta-cyclodextrin ; Electrochemistry ; methods ; Electrodes ; Porphyrins ; chemistry ; metabolism ; Protein Binding ; Serum Albumin ; chemistry ; metabolism ; Spectrometry, Fluorescence ; Spectrophotometry, Ultraviolet ; beta-Cyclodextrins ; chemistry ; metabolism

A large number of bacteria were carried by mites parasitizing on animals and human,which including symbiotic and pathogenic bacteria.Mites were an important transmission media and could spread pathogenic bacteria.A total of 184 literatures were collected from database to analye diversity of bacteria carried by mites.There were about 105 species bacteria were carried by 94 mites.These bacteria belong to 9 phylums,22 orders,40 families and 55 genuses(including 17 pathogen and 20 opportunistic pathogen).In this paper,we reviewed the diversity of mites-associated bacteria,which could offer some data for investigation on the relationship between mites and mites-associate bacteria.

The paper explains challenge and influence of the building of safe hospital against the "Intemet + " background,and discusses the countermeasures including strengthening personal information protection,the third party supervision,public opinion monitoring,talent cultivation and other aspects,in order to promote rapid development of safe hospital building.