The lack of donor corneal endothelium is a serious impediment to the development of corneal endothelial transplantation,whereas the bioengineered cornea provides an approach to this problem.Functional corneal endothelial cells which differentiated from human embryonic stem cells (ESCs) can,to some extent,relieve the lack of donor corneas,especially for corneal endothelia.At the moment,an optimal way of offering bioengineered-corneal endothelium is to cultivate the corneal endothelial cells in vitro.This is a process of inducing human ESCs to differentiate into neural crest stem cells (NCSCs) and then into corneal endothelial cells in a favorable medium with growth factors and extracellular matrix,which are matched microenvironment of endothelial cells in vitro.However,the inducement condition is still pending and remains for further research.This article reviewed the researching development of bioengineered-corneal endothelium from the effect of microenvironment and the induction of human ESCs.

The vetting of senior professional positions in hospitals is related not only to the development of staff members,but also to the quality of the medical service.It is a multiple-stage process,which involves individuals and every department of a hospital,and is associated with a good understanding of policy and professional knowledge.Naturally,the vetting of senior professional position may bring about many new conditions and problems now and then,which pose challenges that need to be perceived and solved in time.The this article focuses on the resolution of the problems that may arise during the vetting process of senior professional positions of a hospital,and proposes suggestions for the improvement of the vetting.

0.05).TGF-?1 of patients with PHN,trigeminal and glossopharyngeal neuralgia either administered NSAIDs drugs or not were significantly lower than patients with Cervical spondylosis and lumbar disc herniation either administered NSAIDs drugs or not respectively(P

This article briefly introduces how to rationally use antibiotics in patients with strokeassociated pneumonia from the aspects of etiology,disease,and antibiotic use.A great importance should be attached early to the standard pathologic examination,and the initial empiric treatment should be timely and adequate.The complex preparation of broad-spectrum penicillin/β-lactamase inhibitor is generally recommended,on this basis,the etiological examination results should be sought actively.Selecting the highly targeted or sensitive antibiotics improve the efficacy and reduce adverse reactions.

Objective To investigate the distribution of aminoglycoside modifying enzyme genes (AMEs) and 16S rRNA methylase genes in drug-resistant strains of Pseudomonas aeruginosa. Methods Twenty strains of drug-resistant Pseudomonas aeruginosa were isolated from sputum and wound secretion samples collected from the First People's Hospital of Huai' an in Jiangsu province. Eight AMEs [aac(3)-Ⅰ , aac(3)-Ⅱ, aac(6')-Ⅰb,aac(6')-Ⅱ, ant{2)-Ⅰ ,ant(3)-Ⅰ , ant(4')-Ⅰ , aph(3')-Ⅱb] and 6 16S rRNA methylase genes (armA, rmtA, rmtB, rmtC, rmtD, npmA) were analyzed by PCR and verified by DNA sequencing. Results Out of 20 strains of Pseudomonas aeruginosa, aac(6')-Ⅱ was positive in 8 strains (40.0% ) , ant2- Ⅰ in 8 strains (40.0% ) , aac(3)-Ⅱ in 5 strains (25.0% ) , aac(6')- Ⅰ b in 2 strains (10.0% ) and rmtB in 1 strains (5.0% ) , respectively. The rest 9 genes were not detected. Among 2 strains harboring aac(6')- Ⅰ b, DNA sequencing confirmed that 1 was aac(6')- Ⅰ b (the clssical type) and another was aac(6')- Ⅰ b-cr. Conclusion Gene aac(6')- Ⅰ b-cr exists in drug-resistant Pseudomonas aeruginosa, and it has modifying effect on both aminoglycosides and quinolones.

Objective To investigate the distribution and variety of quinolone-resistance genes in a group of multiple resistant Klebsiella.Methods A total of 20 strains of multiple resistant Klebsiella were collected from inpatients in Huai' an First People' s Hospital of Nanjing Medical University during February 2010 and March 2012.Strains were identified by molecular identification,and quinolone target genes (gyrA,ParC) and quinolone-resistance genes mediated by mobile genetic elements (qnrA,qnrB,qnrS,aac (6′)-Ⅰ b-Cr,qepA) were analyzed with polymerase chain reaction (PCR).Results In 20 strains of Klebsiella,19 were Klebsiella pneumonia,and 1 was Klebsiella variicola.gyrA and parC genes were found in all 20 strains,and gyrA mutation was found in 11 strains (55.0％),andparC mutation was also found in 11strains (55.0％).aac(6′)-Ⅰ b-cr was positive in 10 strains (50.0％),qnrA was positive in 1 strain (5.0％),and qnrB was positive in 3 strains (15.0％).gyrA and parC in strain No.6 and No.10 were both novel variants (GenBank registration number:JX123016,JX123017,JX144393,JX144394).Conclusion Quinolone-resistance-determining region plays a key role in resistance to quinolones in this group of Klebsiella,and it is the first report on the emergence of novel variants of gyrA and parC in one Klebsiella pneumonia in China.

Objective To study the expression of malignant melanoma(MM) related genes by cDNA microarray technique. Methods mRNA, extracted from tissues of patients and normal controls, was reversely transcripted into cDNA and marked with 33P. The cDNA probes were hybridized to cDNA microarrays, which contained 2000 human genes each array. The down-regulation of two co-differentiated expressed genes was confirmed by quantitative real-time RT-PCR. Results Different expression between MM and normal controls was found in 4.7%-6.15% of genes by more than 2 times,0.75%-1.4% by more than 5 times, and 0.45-0.5% by more than 10 times. These genes were pro-oncogenes, tumor suppressor genes, genes related to apoptosis, cell cycle related genes, and so on. Three genes were down-regulated in all of the patients. Two of those genes, histidine triad nucleotide-binding protein (HINT) and RBP1-like protein (BCAA), were down-regulated, as identification by quantitative real-time RT-PCR. Conclusions cDNA microarray can be used effectively to reveal melanoma gene expression profiling for the propose of carcinogenesis study. HINT and BCAA are the first reported genes down-regulated in MM. However, further studies are needed for their expressive specificity and mechanism in MM.

Purpose:To investigate the therapeutic effect of PEFC chemotherapy regimen (cisplatin or carboplatin,etoposide,fluorouracil and cyclophosphamide) on primary carcinoma of fallopian tube.Methods:41 patients with primary carcinoma of fallopian tube were divided into two groups: 20 patients in PEFC group received PEFC chemotherapy; 21 patients in CAP group received CAP chemotherapy. The therapeutic effects of the two groups were compared.Results:1 , 3 , 5 year progression free survival rate of PEFC group and CAP group were: 100%, 67.34%, 67.34%; 76 19%, 51 88%, 45 40% respectively ( P

Objective:To study the feasibility and reliability of using phosphorylated H2AX(?H2AX)as a predictor for sensitivity of hepatic carcinoma cell HepG2.215 to chemotherapy agents: etoposide, doxorubicin, mitomycin, and cisplatin. Methods: HepG2.215 cells were exposed to etoposide, doxorubicin, mitomycin or cisplatin of 1, 2, 4 and 20 concentration index (CI). Untreated HepG2.215 cells were taken as control. The proportion of HepG2.215 cells expressing ?H2AX was measured by flow cytometry, the number of ?H2AX foci in HepG2.215 cells was measured by immunocytochemistry, and cell proliferation was measured by MTT. The correlation between the number of ?H2AX foci and the percentage of HepG2.215 cells expressing ?H2AX in HepG2.215 cells was analyzed; the correlation of CI with the percentage of HepG2.215 cells expressing ?H2AX or ?H2AX foci and inhibitory rate of cell proliferation was analyzed; and the correlation of inhibitory rate of cell praliferation with the percentage of HepG2.215 cells expressing ?H2AX or ?H2AX foci was also analyzed. Results: There was a positive correlation between the number of ?H2AX foci and the percentage of HepG2.215 cells expressing ?H2AX in HepG2.215 cells after treatment with the above 4 agents (all P

OBJECTIVE To investigate the genetic markers of integron and transposon in multidrug-resistant strains of Escherichia coli.METHODS The genetic markers of integron(qacE△1-sul1) and transposons(merA,tnpA and tnpU) were detected by polymerase chain reaction(PCR).RESULTS In 20 strains,14 strains carried qacE△1-sul1,and 3 strains carried merA.CONCLUSIONS There are high percentages of the genetic markers of integron(qacE△1-sul1) and transposon(merA) in multidrug-resistant strains of E.coli.