Objective To test the test-retest reliability for the BTE Primus grip attachment.Methods30 healthy adults were recruited to test the grip strength of BTE Primus grip attachment and Jamar grip tool in one day, the 2nd retest was conducted 7 days late.ResultsThe BTE Primus grip tool was found to be reliable (ICC = 0.957, 95%CI = 0.908～0.980) and valid ( r=0.842, P<0.01).ConclusionBTE Primus grip attachment can be applied when evaluating hand function in clinic.

Based on the characteristics that most patients in Vocational Rehabilitation Department of Guangdong Provincial Work Injury Rehabilitation Hospital are patients with occupational injuries,the paper analyzes the hospitalized business process,concretely introduces the main functional modules,design framework,safety requirements,database design,etc.of the vocational competency assessment system.The application of this system provides references for rehabilitation doctors and vocational rehabilitation therapists to make training schemes,strengthens patient information management,improves working efficiency and service level.

Objective To explore the rate of return to work among a cohort of spinal cord injury (SCI) who were at least 18 months post injury and some psychosocial factors contributing to return to work. MethodsA convenient sampling method was adopted and total 161 subjects were involved. The demographic characteristic and psychosocial variable were collected by 6 self-reported questionnaires: World Health Organization Disability Assessment Schedule Ⅱ, Acceptance of Disability Scale, Rosenberg Self-Esteem Scale, Center for Epidemiologic Studies Short Depression Scale, Generalized Self-Efficacy Scale and Multidimensional Scale of Perceived Social Support. Self-administered, telephone and face-to-face interview were the manners to capture data. ResultsThe return to work rate is 31%. The result generated from Logistic regression showed that the type of SCI (paraplegia or quadriplegia) （OR=4.397）, acceptance of disability (OR=0.979), disability assessment level (OR=0.948), and the impact of belief to activities of daily living (OR=0.681) were the contributors for successful return to work. ConclusionFor those who suffering from SCI after 18 months, both psychosocial adjustment factors and physical functioning may have the great impacts for the outcomes of return to work rather than that of external factors, such as social supports.

Objective To investigate the effect of FNR on type Ⅲ secretion system (T3SS) in E.coli O157 ∶ H7.Methods fnr mutant was constructed by λRed recombineering technology promoted by Bet and Exo proteins using PCR products.Results Through bacterial infection assays and immunofluorescence microscopy,it was found that the adhesion ability was decreased insignificantly infnr mutant compared to the wild type ZAP198.However,the secreted proteins were reduced significantly in the mutant from the secretion profile.Conclusion The reason might be that high ClpXP protein caused by the deletion of fnr degraded GrlA resulting in the inhibition of LEE(locus of enterocyte effacement) and T3SS.

Objective To investigate the effects of shiga toxin ( Stx ) phage on the expression of type Ⅲsecretion system (T3SS) in E.coli O157 ∶H7.Methods A standard E.coli O157 ∶H7 strain, EDL933 and a natural Stx phage defective mutant of EDL 933 strain, TUV93-0 were used for this study .The expression of T3SS proteins was compared between EDL 933 and TUV93-0 strains.The expression of five operons ( LEE1-LEE5 ) was evaluated by measuring the green fluorescent protein ( GFP ) in five different plasmids with LEE1-LEE5 promoters, respectively.Results The expression of T3SS proteins in TUV93-0 mutant were significantly increased than those in EDL 933 strain.Moreover, the expression of LEE1, LEE2 and LEE5 were also increased in TUV93-0 mutant.Conclusion The deletion of Stx phage might enhance T3SS expression through the regulation of LEE 1.

Objective To investigate the tellurite resistance level,the presence of tellurite resistance (ter) gene cluster and their relationships in non-O157 Shiga toxin-producing Escherichia coli(STEC) isolates.Methods Tellurite resistance level was evaluated by plate dilution method and the ter gene cluster was tested by PCR.Results Only 5 of 39 non-O157 STEC isolates tested in this study were identified to have ter gene cluster,which showed relatively high levels of tellurite resistance ranging from 128 μg/ml to 512 μg/ml.In contrast,the other 34 isolates without ter gene cluster were sensitive to potassium tellurite and showed very low levels of tellurite resistance,the minimal inhibitory concentration (MIC) was ＜1 μg/ml for 29 isolates,8 μg/ml for 2 isolates and 2 μg/ml for 3 isolates.Conclusion Most non-O157 STEC isolates were sensitive to potassium tellurite.It could be concluded that much attention should be paid when screening the non-O157 STEC isolates using the selective medium supplemented with potassium tellurite.

[Objective] To set up an optimized protocol for aneuploidy detection from single cells through Array- Comparative Genetic Hybridization (CGH).[Method] Two cell lines,trisomy 18 (Tri-18;GM02732,47,XY,+18) and chromosome 4 segment deletion [sDel-4;GM00343,46,XY,4(del) (qter ＞ p14)],were used in the study.In combination of 10 k 2.0 SNP mapping array platform and multiple displacement amplification (MDA),the diagnostic accurate rates of MDA product from single cells of the two cell lines using gDNA and single-cell MDA product as reference were compared.[Result] An extremely lower call rate (3.2 ± 1.2)% in the negative control group was observed compared to the experiment groups.When the single-cell MDA product was used as reference,the standard deviations of Log2 (signal intensity ratio) were significantly decreased in both groups,compared with when the gDNA as reference (P ＝ 0.004).Through CNAT analytic software,some specific chromosomes (16,17,19,and 22) presented obvious preferential amplification (PA) when the gDNA was used as reference,but this PA could be eliminated when single-cell MDA product was used as reference.[Conclusion] 10 k 2.0 SNP mapping array in combination with MDA could be a quick,highly efficient and accurate method to detect aneuploidy in single cells.

AIM: To explore the activation effect of calcium ionophore A23187 on unfertilized human mature oocytes after conventional in-vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). METHODS: Thirty-seven unfertilized mature oocytes from IVF and 41 after ICSI were included in our experiment. They were incubated in 5 ?mol/L calcium ionophore A23187 for 5 minutes. Second polar body extrusion and pronuclear formation were recorded 12-16 hours later. The activated oocytes were cultured for another 2 days in vitro. RESULTS: Activation rate of unfertilized oocytes from conventional IVF and ICSI were 64.9%(24/37)and 73.2%(30/41), respectively. Among 41 unfertilized oocytes after ICSI treated with A23187, 30 were activated and 24 had 2 polar body (PB) and 2 pronuclear (PN). But for the unfertilized oocytes from conventional IVF only 20% activated oocytes had 2 PN and 2 PB. The percentage difference of oocytes containing 2 PB and 2 PN between the two groups was significant ( P

Objective To investigate the morphological characteristics and proliferation ability of diabetes mellitus-derived adipose-derived stem cells (ADSCs) by comparing with normal-derived ADSCs.Methods The ADSCs could be achieved from diabetes mellitus' adipose tissue by the similar method of normal ADSCs isolation and culture,and then the differnce was compared between the two groups about their morphologies under microscope,and the proliferation ability of two groups was determined by CCK-8.Results ADSCs in patients with diabetes were obvious hypertrophy and irregular in morphology.A values of ADSCs in diabetes and non-diabetes were 0.210+0.002 and 0.390+0.006 in 1st day;0.250+0.015 and 0.443+0.023 in 2nd day;0.368+0.014 and 0.726+0.033 in 3rd day;0.368+0.014 and 0.726+0.033 in 4th day;1.767+0.072 and 3.153+0.067 in 5th day and 1.810+0.072and 3.170+0.021 in 6th day,respectively.The difference was statstically significant at the beginning from 4th day (P＜0.05).Conclusions There is obvious difference of the microscopic morphology between the diabetes mellitus-derived ADSCs and normal-derived ADSCs.The proliferation ability of the diabetes mellitus-derived ADSCs is lower than normal-derived ADSCs.These difference could be closely related to ulcerous non-healing wounds in patients with diabetes mellitus.

Objective To analyze the subtypes of eae genes in various non-O157 Shiga toxin-pro-ducing Escherichia coli ( STEC) strains isolated in China.Methods The complete nucleotide sequences of 10 eae genes were amplified by PCR and sequenced.The BLASTn software was used to analyze the se-quences for eae gene subtyping.A phylogenetic tree was constructed based on the10 ea e gene sequences to-gether with the gene sequences of 30 different subtypes in GenBank and those of STEC strains of 7 prevalent serotypes (O157 ∶H7, O26 ∶H11, O103 ∶H2, O111 ∶H8, O145 ∶H28, O45 ∶H2 and O121 ∶H19) using MEGA 5.0.Multilocus sequence typing (MLST) was performed on the 10 STEC strains with reference to the Escherichia coli ( E.coli) MLST website ( http://mlst.warwick.ac.uk/mlst/dbs/Ecoli) for the typing of multiple loci.A minimum spanning tree ( MST) was constructed using the BioNumerics software to inves-tigate the phylogenetic relationships between the 10 eae gene-positive STEC strains in this study and hemolyt-ic uremic syndrome-associated enterohemorrhagic E.coli ( HUSEC) strains as well as all human STEC strains of O157, O26, O45, O103, O111, O121 and O145 serotypes submitted to the E.coli MLST website data-base.Results The complete nucleotide sequences of eae genes in 10 non-O157 STEC strains were 2.8 kb in length and belonged to 3 known subtypes.The predominant subtype wasβ1, accounting for 60%of the 10 STEC strains (6/10), followed byθandγ1 subtypes with two strains in each type.The eae gene sequences in certain strains were identical to those of the prevalent serotypes.Seven sequence types ( STs) were identi-fied from the 10 STEC strains carrying eae gene.Conclusion The eae genes harbored by the non-O157 STEC strains isolated from different specimens in China were diverse and had close phylogenetic relationships with the highly pathogenic and prevalent STEC strains.This study implied that the STEC strains harboring eae gene had high pathogenic potential.