The structure, reaction mechanism and molecular biology of Leuconostoc mesnteroides dextransucrase are reviewed.

Objective To analyze the epidemiological characteristics of Mycobacterium tuberculosis by enterbaeterial repetitive intergenic consensus-polymerase chain reaction(ERIC-PCR)DNA fingerprint. Methods Mycobacterium tuberculosis positive sputum samples between September 2003 to May 2006 were collected and cultured.Chromosomal DNA were extracted and ERIC-PCR DNA fingerprinting was analyzed by software,such as RAPD PHYLIP and Treeview.Results A total of 42 different fingerprints were detected.Phylogenetic analysis showed that they could be classified into three clusters,the clustering rate was 72.6%.The characteristics of ERIC-PCR fingerprint patterns were related to age,drug resistance,and type of resistance.Conclusions ERIC-PCR DNA fingerprinting technique used in this study is good for epidemiological studies with its strong discrimination,simplicity and rapidness.A high level of recent transmission is found in our city.

Animals ; Arsenic ; toxicity ; Comet Assay ; DNA Damage ; drug effects ; Lymphocytes ; drug effects ; metabolism ; Male ; Malondialdehyde ; metabolism ; Rats ; Rats, Wistar ; Tobacco Smoke Pollution ; adverse effects

Objective To evaluate the efficacy and safety of transarterial chemoembolization (TACE)combined with sonographically guided percutaneous microwave coagulation therapy(PMCT)for hepatic carcinoma with diameter＞5.0 cm.Methods We retrospectively reviewed 68 cases of hepatic carcinoma with diameter＞5.0 cm under treatment of TACE combined with PMCT.CT,USG and correlated laboratory tests of hepatic carcinoma were carried out.Results Among 68 cases,complete ablation were 5 cases(5/68),tumor ablation area more than 50% or tumor shrinkage less than 30% were 59 cases(59/ 68),tumor ablation area less than 50% or tumor shrinkage more than 30% were 6 cases(6/68).Forty five cases with high AFP descended more than 50% after the procedure in 42 eases(93.33%).Thirty seven cases and 29 cases with increase of CEA and CA19-9 decreased to 28(75.97%)and 23(93.10%)cases with corresponding index decreasing more than 50% respectively.Survival time reached 4-6 months in 3 cases, more than 6 months for 31 cases,more than 12 months of 34 cases.Two cases among them showed no recurrence up to now after stoppage of treatment for 24 months and finally no correlative mortality occurred. Conclusion TACE combined with sonographically guided PMCT for hepatic carcinoma with diameter more than 5 cm is safe and effective.

Objective To probe into the effects of fluoride on metal elements in the testis tissue of male rats, and provide experimental basis to further research for reproductive toxicity of fluoride. Methods Thirty-two healthy male Wistar rats, weighting 150 - 180 g, were randomly divided into 4 groups, normal sodium(control) by intragastrie administration for 90 days, and body weight was observed daily. After the last intragastric administration, all rats were killed by cervical dislocation. The contents of calcium(Ca), ferri(Fe), zincum(Zn),cuprum(Cu ) and magnesium(Mg) in the testis tissue were measured by atomic absorption speetrophotometry.Results After 30 days exposure, the difference of body weight between groups was statistically significant(F=3.884, P < 0.05). The body weight in low- and medium-dose groups[(235.00 :t: 14.56), (235.44 ± 24.99)g] were significant increased than high-dose group[(206.00 ± 18.16)g, all P < 0.05]. There was no significant difference of body weight between the groups at 0, 60 and 90 days(F = 0.501, 0.578, 1.893, all P > 0.05). The difference of Ca, Zn and Mg levels among four groups was statistically significant(F = 6.630, 6.844, 5.333, all P < 0.05). The content of Ca of the low-dose group[(56.15 + 4.21 )mg/kg] decreased than that of the control group[(77.57 ± 6.66)mg/kg, P < 0.05];the content of Zn of the low-, medium- and high-dose groups[(4.80 ± 0.55), (4.56 ± 0.33),(5.46 ± 0.79 )mg/kg] deceased than that of the control group [(7.16 ± 0.28 )mg/kg, all P < 0.05];the content of Mg of the high-dose group [(32.44 ± 1.53 ) mg/kg] decreased than that of the control group [(42.54 ± 8.07 ) mg/kg,all P < 0.05]. The difference of testis Fe and Cu between four groups was not statistically significant(F = 1.324,0.207, all P > 0.05). Conclusion Chronic fluorosis can affect the levels of metal elements in rat testis and damage the reproductive system.

Objective To investigate the clinical value of measurement of phrenic nerve conduction function.Methods Evoked potentials of the phrenic nerve were measured in 292 patients with brachial plexus injuries.According to the normal value that was established in the electromyogram in our hospital,we divided them into normal and abnormal evoked potential groups,and then,the latent period and wave amplitude in the two groups were compared.Results Compared to those in the normal potential group,the latent period in abnormal group was significantly high and wave amplitude low(P＜0.05).Conclusion Measurement of phrenic nerve conduction is convenient,safe,and reliable to evaluate the conduction function of the phrenic nerve.

OBJECTIVEThe aim of the present study is to explore the effects of exhaustive exercise-induced oxidative stress on the antioxidant capacity and diformability of rat red blood cells.

METHODSRats were divided into three group (n = 10): sedentary control (C), exhaustive running exercise (ERE) and moderate running exercise (MRE) groups. Animals in the ERE group started treadmill running at a speed of 20 m/min speed with a 5% gradient, and reached a speed of 25 m/min with gradient 15% in 20 min. Running was continued until exhaustion. MRE group rats running at a speed of 20 m/min with a 5% gradient for 40 min. The levels of free thiol in erythrocyte membrane protein, lipidperoxidation levels and membrane protein components were analyzed. The red blood cell deformability of different groups was also observed.

RESULTSThe results showed that red blood cells were damaged by severe oxidative stress and the anti-oxidative capacity decreased significantly under exhaustive exercise conditions. Besides, lipid peroxidation and protein sulfhydryl cross-link based clustering of membrane were found after exhaustive exercise, and polymers high molecular weight (HMW) was formed. The elongation index (EI) was found to decline significantly in the ERE group compared with the C and MRE groups under shear stress (control group, 0.41 +/- 0.01 at 3 Pa and 0.571 +/- 0.008 at 30 Pa; ERE group, 0.314 +/- 0.013 at 3 Pa and 0.534 +/- 0.009 at 30 Pa; P < 0.05 and P < 0.01, respectively).

CONCLUSIONThese exercise-induced oxidative injure result in a significant decrease in deformability of rat erythrocytes, which in turn leads to dysfunction in the microcirculatory.

Animals ; Disease Models, Animal ; Erythrocyte Deformability ; Fatigue ; metabolism ; physiopathology ; Male ; Oxidative Stress ; Physical Conditioning, Animal ; Rats ; Rats, Sprague-Dawley

Objective To perform a biomechanical study on and compare the stability of internal fixation with closed Kirschner wire in different spots from the epicondylus medialis to sulcus nervi ulnaris and epicondylus lateralis of humerus in the treatment of GartlandⅢsupracondylar fractures of humerus in children in order to provide basis for avoiding cubitus varus in clinic.Methods Twenty models of su- pracondylar fractures were made from ten humerus samples,then divided into two groups(group A and group B).They were fixed with closed Kirschner'wires.Ulnar Kirschner wire varied.In group A five spots were selected averagely from the epicondylus medialis to the sulcus nervi ulnaris.Kirschner wires entered from one of the five spots into another spot of humerus.In group B Kirschner wires entered defferent spots of humerus from the central spot of sulcus nervi ulnaris.Biomechanical tests were carried out,such as axial load,axial displacement,stress intensity,axial rigidity and anti-twisty ability.Forty-six children with Gart- landⅢsupracondylar fracture of humerus were treated and followed up for more than one year.Results In beth groups,with the angle of Kirschner wires and fracture side increasing,the strain and the vertical displacement decreased,the stress intensity and the axial rigidity increased,and the anti-twists ability was enhanced.There was statistic difference(P＜0.05).The follow-up of the 46 patients showed the elbow joint function recovered well with no cubitus varus malformation.Conclusion Internal fixation with closed Kirschner wires in sulcus nervi ulnaris from the epicondylus medialis and the epicondylns lateralis of humerus for GartlandⅢsupracondylar fracture of humerus in children has the advantages of enhancing bio- mechanical stability,effective prevention of secondary replacement of outlying black of the fracture and a- voidance of cubitus varus.It can be widely used clinically.

Background Application of confocal microscopy in the investigation of ocular surface system in living eye have been greatly extended in two decades.In vivo confocal microscopy allows the evaluation of the normal or pathological tissue at the cellular level.However,seldom study about the morphology of normal in vivo human bulbar conjunetiva under the confocal microscopy was induced. Objective Present study was to analyze the appearance of normal bulbar conjunetiva cells under the in vivo confocal microscopy. Methods Laser scanning confocal microscopy was used to examine the morphological characteristics of the bulbar conjunetiva in 21 eyes of 15 healthy volunteers.The parameters of confocal microscopy were as follows:resolution 1 μm,wave length 670 nm,field range 400 μm×400 μm.The epithelial cell numbers,dendritics cells density and goblet cells density from superior,inferonasal,nasal and temporal bulbar conjunctiva were calculated respectively and compared and imaged by the HRT3 Rostock Cornea Modual. Results The superficial epithelial cells of the bulbar conjunctiva was seen with the small cell nuclei and blur border.The borders of basal epithelial celt were clearly visible without cell nuclei.The presumed goblet cell presented with a large hyperreflective oval-shaped cell with relatively homogeneous brightness,crowed in groups or mainly dispersed.The orfices at the epithelial surface represented the goblet cells,showing some open and expel contents.The dendritic cell appeared to be hyperreflective corpuscular particles with visible processes among conjunetival epithelial cells.A few dense white fiber meshwork was exhibited in conjunctival stroma with the traverse blood vessels containing cellular elements.The superficial and basal epithelial cell densities were 2556±692and 2985±376 cells/mm2 respectively,and overall goblet and mature dendritic cells densities were 77±39 and 26±35 cells/mm2 respectively.Significant differences were proved in globet cell density and dendritic density among different conjunetival zones(P=0.001,P=0. 000),however,the alteration of conjunetival epithelium cells was insignificant in different area(P=0.204,P=0.130).Conclusion Confocal microscopy is a useful tool for the study of morphology of human bulbar conjunctiva cells in vivo.which offer a valuable aid in the diagnosis of ocular surface disease.

Background Blepharitis is a common ocular surface disease.It is associated with the disorder of lipid secretion of meibomian gland.The change of tear film stability can cause dry eye symptoms,so blepharitis is thought to be one of the factors causing dry eye,but the relation between them is in study. Objective This study was to observe the morphology of meibomian gland in blepharitis patients and to investigate the correlation of morphology of meibomian gland with dry eye. Methods A series of case-observational study was designed in this study.A total of 83 eyes of consecutive 83 blepharitis patients were enrolled in Henan Eye Institute from October 2010 to April 2011.Blepharitis was diagnosed based on American Preferred Practice Pattern Guidelines.Some relevant ocular examinations were performed under the informed consent of the subjects,including the anterior segment manifestation by the slit lamp,such as meibography,lid margin abnormality,and the dry eye-relevant examinations,such as tear film break-up time (BUT),Schirmer test Ⅰ and corneal fluorescein staining also been carried out.Tear film shape was examined by film interference images and scored.Absent degree of meibomian gland was graded under a Noncontact Infrared Meibography.The correlations of absent degree of meibomian gland with ocular syndrome score,dry eye examination results were evaluated using Spearman rank correlation coefficients.Informed consent was obtained prior to this trail. Results No significant difference in the frequencies of blepharitis was found between male and female among different ages (x2 =2.69,P =0.75 ).Absent grading of the meibomian glands was positively correlated with age of blepharitis patients ( r =0.58,P =0.00 ),lid margin abnormality scores ( r =0.64,P =0.00 ),conjuntival hyperemia score ( r=0.50,P =0.00),tear film interference imaging grade ( r =0.23,P =0.04 ),corneal fluorescein staining score( r =0.50,P =0.00 ) but was negatively correlated with BUT ( r =-0.32,P =0.00 ).No significant correlation was found between meibography grading and gender( r =-0.09 ; P =0.99 ) or Schirmer test Ⅰ ( r =-0.05;P =0.69 ).No significant difference was found in meibography grading between male and female in different age groups(Z=-0.09,P=0.93). Conclusions Blepharitis can irriter dry eye symptom because of overevaporation of tear fluid and abnormality of secreting function of meibomian glands.The missing of the meibomain glands increases with age in the patients with blepharitis.Noncontact Meibography System is an assistant tool to the diagnosis of blepharitis.