目的观察75岁以上老年人急性心肌梗死(acute myocardial infarction,AMI)静脉溶栓治疗的疗效。方法48例75岁以上采用尿激酶溶栓治疗的患者与同期94例<75岁的AMI患者溶栓治疗做对照。结果≥75岁组的再通率为68.7%,<75岁组为72.3%;轻度出血分别为6.3%和5.3%,重度出血均为0%;心率失常分别为41.6%和49.9%;病死率为6.3%和5.3%。两组患者12h静脉溶栓治疗再通率无显著性差异,并发症及病死率也无显著性差异(P>0.05)。结论75岁以上老人静脉溶栓治疗是安全有效的。

Objective To study human prostate cancer tissue specific hytk gene therapy vector using prostate specific antigen (PSA) promoter,and to determine its feasibility. Methods A prostate tissue specific hygromycin phosphotransferase thymidine kinase fusion gene(hytk)vector was established with the substitution of CMV promotor in tgCMV/hytk vector with PSA promotor.The vector was transferred into prostate carcinoma cell lines with FuGENE TM 6.Antitumor effects were observed after GCV treatment. Results PSA promoter that actively drives hytk gene was expressed only in the PSA producing prostate cell line(LNCaP).In vitro experiments demonstrated the LNCaP cells transferred by HyTK gene were killed in the presence of GCV treatment. Conclusions Hytk based vector harboring PSA promoter is a novel ideal candidate vector for prostate carcinoma gene therapy.

The major challenge in the development of recombinant biologics lies in generating and isolating rare high-producing stable single clone in a short period of time. The selection marker is an essential component of the plasmid vector, it plays an important part in the generation and screening of producing cell lines. Engineering the selection marker to enhance the stringency of selection for high producing cells is one of the most effective approaches to improve the cell line development process. Here, using Chinese hamaster overy (CHO) cells as an example, we introduce the application of selection marker for generation of recombinant biologics producing mammalian cell lines, methods of engineering the selection markers to enhance the selection stringency, and propose considerations on cell substrate stability and selection marker safety, in order to provide references for high-efficiency development of recombinant biologics.

The present paper is to evaluate the scientific research level and development trends of biomedical engineering in China using metrology analysis on Chinese biomedical engineering scientific literatures. Pubmed is used to search the biomedical engineering publications in recent 5 years which are indexed by Science Citation Index, and the number and cited times of these publications and the impact factor of the journals are analyzed. The results show that comparing with the world, although the number of the publication in China has increased in recent 5 years, there is still much room for improvement. Among Chinese mainland, Hongkong and Taiwan, Chinese mainland maintains the obvious advantage in this subject, but Hongkong has the highest average cited number. Shanghai and Beijing have better research ability than other areas in Chinese mainland.
Bibliometrics ; Biomedical Engineering ; China ; Hong Kong ; Journal Impact Factor ; Periodicals as Topic ; PubMed ; Taiwan

Objective To study the feasibility and curative effect of transumbilical single-incision (TSIL) vs multiple-incision (MIL) laparoscopic splenectomy.Methods Ten cases (2 cases of idiopathic thrombocytopenia purpura,1 case of hereditary spherocytosis,3 cases of splenic hemangioma and 4 cases of cirrhotic splenomegaly) underwent TSIL from Jan 2010 to Ju12011,and 12 cases (3 cases of ITP,2 cases of hereditary spherocytosis,3 cases of splenic hemangioma and 4 cases of splenomegaly) underwent MIL.Clinical data were compared with each other.Results No severe complications occurred in either group.The mean operation time of single-incision group and multiple-incision group was ( 182 ± 23 ) min and ( 169 ± 19) min,and blood loss was( 160 ± 13 ) ml and ( 155 ± 16) ml ( P ＞ 0.05 ).The post-operative pain score in TSIL and in MIL group was respectively [ ( 1.60 ± 0.20) vs (3.60 ± 0.90) on day 1,P ＜ 0.05 ; (0.50 ±0.10) vs (2.00 ±0.45) on day 2,P ＜0.05].There was no significant difference between the two groups in the recovery of the gastrointestinal function,the length of hospital stay and the cost of hospitalization, all P ＞ 0.05.The umbilical incision in TSIL cases is more cosmetic.Conclusions Transumbilical single-incision laparoscopic splenectomy is feasible and safe in experienced hands.

Objective To determine the gene polymorphism and serum concentration of mannose-binding lectin (MBL) in patients with psoriasis,and to analyze the relationship between MBL and psoriasis.Methods Totally,67 patients with psoriasis vulgaris and 69 healthy human controls were enrolled in this study.Venous blood samples were obtained from all the subjects.Genomic DNA was extracted,and PCR-restriction fragment length polymorphism (PCR-RELP) analysis was conducted to determine the polymorphism at codon 54 of the MBL gene.Enzyme-linked immunosorbent assay was performed to measure the serum level of MBL.A chi-square goodness-of-fit test was carried out to evaluate Hardy-Weinberg equilibrium,t test to compare the serum concentration of MBL,and chi-square test to compare the frequency of genotypes and alleles of MBL gene codon 54.Results The patients with psoriasis showed higher frequency of GGC/GAC heterozygote but lower frequency of GGC/GGC homozygote (x2 =10.36,P ＜ 0.05),together with increased frequency of GAC allele but decreased frequency of GGC allele (x2 =8.31,P ＜ 0.05),at codon 54 of the MBL gene compared with the healthy controls.The variant allele GAC at codon 54 of the MBL gene was markedly associated with psoriasis (OR =3.383,95％ CI 1.585-7.211,P ＜ 0.05).The serum concentration of MBL was (2.193 7 ± 0.816 3) mg/L in patients with psoriasis,significantly lower than that in the healthy controls ((3.269 5±1.205 8) mg/L,t=6.11,P＜ 0.05).Conclusion MBL might be associated with the pathogenesis of psoriasis to some degree.

Objective To investigate the expression of mannose-binding lectin (MBL) in lesions of patients with psoriasis vulgaris,and to explore the relationship between MBL and psoriasis pathogenesis.Methods Immunohistochemistry and Western blot were performed to detect the expression of MBL in lesional and normalappearing perilesional skin of 30 patients with progressive psoriasis vulgaris,as well as in normal skin of 30 healthy human controls.Statistical analysis was carried out by t test using SPSS13.0 software.Results Immunohistochemistry showed that MBL was expressed in lesional psoriatic skin,but weakly expressed or absent in normalappearing perilesional skin and normal control skin,with the relative expression level of MBL in lesional skin significantly higher than that in perilesional skin and normal control skin (0.636 7 ± 0.515 1 vs.0.416 3 ± 0.160 1 and 0.381 6 ± 0.310 9,t =2.24,2.32,respectively,both P ＜ 0.05).Western blot revealed a positive expression of MBL protein in all the skin specimens,and the expression intensity of MBL protein in lesional psoriatic skin was significandy increased compared with perilesional psoriatic skin and normal control skin (0.273 1 ± 0.129 4 vs.0.186 3 ± 0.193 1 and 0.149 2 ± 0.268 7,t =2.05,2.28,respectively,both P＜ 0.05).No significant difference was shown in the expression of MBL protein between perilesional psoriatic skin and normal control skin by immunohistochemistry (t =1.51,P ＞ 0.05) or Western blot (t =0.61,P ＞ 0.05).Conclusion There is a high expression of MBL protein in lesions of patients with psoriasis vulgaris,which may be somewhat associated with the pathogenesis of psoriasis.

Objective To investigate the effects of Triptolide on apoptosis of cultured rat mesangial cells treated by TGF-β1 and the role of Smac in this process. Methods The mesangial cells were pre-treated with different concentrations of Triptolide for 24 hours, then stimulated with TGF-β1 for 24 hours. Apoptotic cells were detected by TUNEL assay. Smac transcription level was determined by Real time-PCR analyses. Smac expression level was assessed using Western blot anal-yses. Localization of Smac was shown by confocal fluorescence microscopy. Results Compared with control group, TGF-β1 inhibited apoptosis and Smac transcription and expression in rat mesangial cells. By contrast, Triptolide promoted mesangial cells apoptosis. In Triptolide groups, Smac mRNA and protein levels were up-regulated. Additionally, in normal and TGF-β1 groups Smac protein was mainly localized in mitochondriawhile in Triptolide groupit was mainly localized in cytoplasm and nucleus with increased fluorescence intensity. Conclusion Triptolide could promote the effect that TGF-β1 inhibited apop-tosis of mesangial cells, through both up-regulation the expression of Smac and stimulating it translocation from mitochon-dria to cytoplasm and nucleus.

Aim To investigate the effects of Aplysin on the inhibition of gastric cancer cell in vitro .Methods MTT assay was used to examine the inhibition of gastric cancer cell 1ine SGC-7901 by Aplysin in different concentrations and at different times.The morphologic changes and the apoptosis of SGC-7901 was observed by inverted microscope and Hematoxylin-Eosin(HE)staining.Reverse transcriptase polymerase chain reaction(RT-PCR)assay was used to detect the changes of COX-2 mRNA expressions.Results Aplysin could decrease the proliferation significantly in a dose-dependent manner in SGC-7901 cells.When treating SGC-7901 with Aplysin in concentration of 120, 240 mg·L~(-1) for 24 h, the growth of the cell was obviously inhibited observing by inverted microscope.Aiso, when treating with the same concentration for 18 h, its chromatin became crimpled and breakdown, as well as cell shrinkage and apoptotic bodies formation when using HE staining.The apoptotic rates(%)of SGC-7901 was(15.0±2.12)%, (18.4±2.3)%, respectively, which was significantly higher than(1.4±0.55)% that in control group(P <0.01).60、120、240 mg·L~(-1) Aplysin could not effectively inhibited the mRNA expressions of COX-2(P ＞0.05).Conclusions Aplysin can inhibit the proliferation and induces apoptosis of SGC-7901 cells.

Objective To investigate the correlation between serum levels of 25 hydroxyvitamin D and immunoglobulin E(IgE)in adults.Methods There were 1 969 participants over the age of 19 were enrolled in this studied,serum total IgE,dermatophagoides farinae(Df)-specific IgE,and serum 25(OH)D levels were analyzed.Other variables included sex,age,body mass index,smoking history,and economic status were collected.Adjusted regression analysis was used to examine the independent association of 25(OH)D with serum IgE levels.Results The average serum 25(OH)D level of 1 969 patients was(18.0±6.5)μg/L,the prevalence of asthma,allergic rhinitis,and atopic dermatitis were 15.2％(299/1 969),2.8％(63/1 969)and 3.0％(68/1 969)respectively,however,there was no significant difference in serum 25(OH)D levels in patients with allergic rhinitis.All subjects were divided into four groups according to the serum 25(OH)D level: Q1:less than and equal to 13.4 μg/L,Q2:more then and equal to 13.4 μg/L but less then and equal to 17.0 μg/L,Q3: more then and equal to 17.0 μg/L but less then and equal to 21.7 μg/L,and Q4: more than and equal to 21.8 μg/L.The median TIgE level increased with higher quartiles in the Kruskal-Wallis test.The prevalence of Df in Q1,Q2,Q3,Q4 group were 39.8％,33.2％,38.7％and 43.1％,respectively.Linear regression analysis indicated that 25(OH)D levels were positively correlated with lgTIgE(regression coefficient:0.011,95％CI 0.001-0.021),25(OH)D in male patients with dust mite allergy was positively correlated with lgTIgE(regression coefficient:0.026,95％CI 0.010-0.043).There was no significant correlation between 25(OH)D and lgTIgE in the other groups.Conclusion Adult serum 25(OH)D levels is positively correlated with total IgE levels.