Background and purpose:The screening of the genes being related closely with the mechanism of osteosarcoma metastasis was a difficult point in the realm of orthopaedics.We screened differential expression gene of human osteosarcoma MG-63 cell sublines with different metastatic capabilities with cDNA microarray,and studied the molecular mechanism of osteosarcoma metastasis.Methods:Total RNA of human osteosarcoma MG-63 cell sublines A1 and A2 was extracted,purified to mRNA and then reversely transcripted to cDNA probe respectively.The cDNA probe of A1 was labelled with Cy3 and the cDNA probe of A2 was labelled with Cy5.The two samples were hybridized with the cDNA microarray.The hybridization signals were scanned by Agilent Scanner and obtained data were analyzed using Ima Gene 3.0 software and Genespring software.Results:222 differential expression genes were found between cell sublines A1 and A2 by analyzing gene expression profile.There were 119 upregulated genes and 103 downregulated genes in cell sublines A1.All differential expression genes belonged to six main function groups and 49 genes of these had very obvious differentce in expression.Conclusions:There were many differently expressed genes between A1 and A2 cell sublines and only part of them were closely associated with mechanism of osteosarcoma metastasis.The technology of cDNA microarray could analyze effectively gene expression profile of human osteosarcoma MG-63 cell sublines, and supply a new approach to study the mechanism of osteosarcoma metastasis

Objective The purpose of this study is to investigate the surgical procedures and curative effect through a small incision on both sides of the scapula for surgical resection the ribs tumor which located un -der ventral surface of the scapula .Methods The group included 11 patients,6 males and 5 females,aged 18 to 49 years.Lesions were bilateral scapula deep square 2~4 single rib bone tumors .Among them there were five ca-ses of fibrous dysplasia ,case of bone cyst ,2 cases of plasma cell tumors and metastatic tumors in 3 cases.Surgery incision through cross-scapular ,to determine which lesions ribs ,cutting the lesions on both sides of the stripping and junction.Results The group obtained a satisfactory excision extension ,one case appeared hemopneumotho-rax postoperatively.Secondly,none of patients occured local recurrence .Thirdly,two patients with metastatic carci-noma died after one year because of multiple metastases .Conclusion Straddling scapular notch is the ideal way to cut off the rib tumor of ventral surface of the scapula .Possessing advantages of a little damage and effect on the function,and rapid recovery .

Objective To explore the effect of different ages on behavioral dimensions of anxiety animal models in Kunming mice.Methods Young/Old,male,Kunming mice were recorded twice,for five minutes,with a one-week inter-trial interval in open field test (OFT),elevated plus maze (EPM) and light/dark box (LDB).The following parameters were evaluated:percentage of time spent in the OFT central area (Ctime％),percentage of number of squares visited in the OFT central area (Ccross％),the total number of horizontal squares in OFT (Cross),the total number of rears in OFT (Rear),percentage of time spent in the EPM open arms (Otime％),percentage of number of entries into the EPM open arms (Oentries％),the total number of entries into the EPM open and closed arms (Entries),percentage of time exploring in the LDB light area (Ltime％),percentage of number of squares crossing in the LDB light area (Lcross％),percentage of rears in the LDB light area (Lrear％),the total number of transition in LDB (Transition),the total number of horizontal squares in LDB (Cross) and the total number of rears in LDB (Rear).Results OFT-Ctime％,OFT-Ccross％,EPM-Otime％,EPM-Oentries％,LDB-Ltime％,LDB-Lcross％ and LDB-Lrear％ had significant loadings on anxiety factor; OFTCross,EPM-Entries,LDB-Transition and LDB-Cross loaded on locomotion-exploration factor.Old mice had higher anxiety emotion (Ctime％,t =3.12,P＜ 0.01; Ccross％,t =2.37,P＜ 0.01; Otime％,t =1.31,P＜ 0.05; Oentries％,t=1.57,P＜0.05; Ltime％,t=4.15,P＜0.01 ; Lcross％,t=3.28,P＜0.01 ; Lrear％,t=2.73,P＜0.01) and lower locomotion and exploratory activity (Cross,t =2.05,P ＜ 0.01 ; Entries,t =2.09,P ＜ 0.05 ;Transition,t=2.51,P＜0.01; Cross,t=3.02,P＜0.01),compared with Young.Conclusion Ages have no effect on structural dimensions of anxiety animal models.With the growth of ages,old mice have higher anxiety emotion but lower locomotion and exploratory activity.

OBJECTIVE:To investigate the mechanism of litchi saponin in impr oving action of insulin resistance(IR)in rats with hyperlipemia-hepar adiposum.METHODS:The hyperlipemia-hepar adiposum was used to establish IR model of rats,the effects of litchi saponin,roglitazone and gliclazide on the index of fasting serum glucose(FSG),total cholesterol(TC),triacylglycerol(TG),high density lipoprotein-cholesterol(HDL-C),tumor necrosis factor(TNF)-?,content of insulin,in?sulin sensitivity(ISI)and so on were observed in the model rats2hours after medication.RESULTS:Litchi saponin could sig?nificantly lower the level of FSG,TC,TG,contents of insulin and the concentration of TNF-?(P

OBJECTIVE To study the genotype distribution of CTX-M type ESBLs in ESBLs-producing Escherichia coli. METHODS All 138 strains of E. coli were collected from the First and Third Affiliated Hospitals,Zhengzhou University from 2006 to 2007. The CTX-M type ESBLs genes were amplified by PCR,the products were sequenced after purification. RESULTS Eighty-two of 138 ESBLs-producing E. coli isolates were classified with CTX-M type-ESBLs genes,and there were 53,27 and 2 strains contained only one type,two types and three types of CTX-M ESBLs,respectively. Among CTX-M type-ESBLs genes,they were identified with CTX-M-1(43 strains),CTX-M-14(56 strains),CTX-M-25(7 strains) and CTX-M-38 (5 strains). CONCLUSIONS The most popular type of CTX-M ESBLs in E. coli is CTX-M14 in Zhengzhou,and two or three kinds of genotypes can exist in 1 strain.

Objective To compare the efficacy and side effects of S-1 combined with oxaliplatin and capecitabine combined with oxaliplatin in treatment of advanced gastric cancer. Methods From Mar 2011 to Dec 2014, the data of 93 cases with gastric cancer in Zhengzhou Peopleˊs Hospital were studied retrospectively. 48 cases treated by S-1 combined with oxaliplatin (SL group) and 45 cases treated by capecitabine combined with oxaliplatin (XL group). The patients of SL group received S-1 80 mg·m-2·d-1, bid, po, d1-14, L-OHP 130 mg/m2, ivgtt, 2 hours, d1. The patients of XL group received capecitabine 2 000 mg·m-2·d-1, bid, po, d1-14, L-OHP 130 mg/m2, ivgtt, 2 hours, d1. The course was 21 days in two groups. The efficacy and side effects were evaluated after two courses. Results The efficacy rates of SL and XL group were 52.08 % (25/48) and 53.33 % (24/45), respectively there was no significant difference (P > 0.05). The incidence rate of gastrointestinal reaction in SL group was obviously higher than that in XL group [52.08%(25/48) vs 24.44%(11/45), P<0.05]. The incidence rate of oral mucositis in SL group was significantly lower than that in XL group [25.00 % (12/48) vs 51.11 % (23/45), P< 0.05]. Conclusion Both S-1 combined with L-OHP and capecitabine combined with L-OHP for gastric cancer treatment are safe and effective.

Objective To investigate the relationship between retinal nerve fiber layer thickness and peripheral neuropathy in elderly patients with type 2 diabetes.Methods Clinical data of elderly patients with T2DM in Endocrinology Department in Beijing Hospital were retrospectively collected.Global and sectorial retinal nerve fiber layer(RNFL)thicknesses were measured by using optical coherence tomography(OCT),and never conduction velocity measurements were performed in all patients.Diabetic peripheral neuropathy was diagnosed by the criteria in diabetic neuropathies update(2010,American Diabetes Association).RNFL thickness was compared between diabetic nonperipheral neuropathy group (control group,n =30)and diabetic peripheral neuropathy group (DPN group,n=17)and between different sub-groups.Results The RNFL thicknesses of temporal,nasal,superior and inferior visual fields and the mean RNFL thickness were less in DPN group than in control group,among which there were significant differences in the RNFL thicknesses of superior,inferior visual fields and the mean RNFL thickness [(107.7±27.4)μm vs.(128.1±17.3)μm,(112.9 ±20.8)μm vs.(130.8±21.8)μm,(88.2±15.5)μm vs.(100.5± 11.3)μm,F=7.446,7.468,7.988,respectively,P=0.009,0.009 and 0.007].RNFL thickness was decreased along with the aggravation of DPN from the control group,the subclinical DPN group to the DPN group successively(all P＜ 0.05).Conclusions Retinal nerve fiber layer thickness is associated with diabetic peripheral neuropathy in elderly patients with type 2 diabetes,and the relationship is more significant in patients with serious DPN.

Objective: To express CTX-M-38 type extended-spectrum-lactamase, and detect its distribution and antibiotic susceptibilities. Methods: Total of 46 strains producing ESBL E.coli was collected from the first affiliated hospital of Zheng zhou University. The CTX-M-38 ESBL gene was selected by PCR using gene recombination technique to construct pET28a-CTX-M-38. The expression of CTX-M-38 in BL21 E.coli and its antibiotic susceptibilities were carried out by liquid dilution test. Testing the enzyme activities of culture supernatant and bacteria sonicate to reflect its distribution. Results: The size of amplified gene product was about 900 bp. The DNA sequence was matched with the information of gene bank. The enzyme activities from bacteria sonicate were stronger than the culture supernatant .The transformant was resistance to penicillins, the first, second and third generations of cephalosporins. It was sensitive to imipenem. The transformant was also sensitive to ceftazidime and aztreonam in vitro, and resistance to antibiotics including beta-lactamase inhibitors except piperacillin/tazobactam. The transformant was also resistance to gentamicin,minocycline, ciprofloxacin and levofloxacin. Conclusion: The CTX-M-38 type ESBL is successfully expressed at designed experimental condition in this study. The product mainly lies inside the bacteria. The transformant shows wide resistance to antibiotics.

Objective To comparatively study the characteristics of 3 kinds of culture substrates of human odontogenic induced pluripotent stem cells(iPSCs).Methods The human odontogenic iPSCs were cultured by 3 kinds of substrates:mouse embryonic fibroblasts(MEF),matrigel and recombinant human vitronectin(VTN-N).The iPSCs growth situation was compared among three groups.Results The preparation time of these 3 kinds of substrates was 14,3,1 hlespectively,and,the difference was statistically significant (P＜0.05).The iPSCs reprogramming time was (30± 1.6),(26 ± 2.1),(27 ± 1.4) d,lespectively,wht that in the MEF group significantly higer than in other two groups (P＜0.05).The reprogramming efficiencies were 0.3 ％ ± 0.03 ％,0.56 ％ ± 0.08 ％,0.7 ％ ± 0.02 ％ respectively (P＜ 0.05).Three kinds of substrate could better support iPSCs growth and make them to maintain un-differentiation status.Conclusion with no heterologous animal components,and the adrantaga of simple pleparation,oonfrollable standard and shorter gramming time is easy to prepare,the standard is controllable and the reprogramming time is shorter,which is an ideal substrate for supporting iPSCs growth.