Due to the complicated and changeable clinical symptoms,and inexact pathogenesis,leukemia was facing huge challenges in diagnosis and therapy.Aptamer could be selected through CELL-SELEX.The aptamer not only display high affinity and specificity to target cell,but also it could discriminate the specific stage of cell,such as different classification,normal and tumor cells.So CELL-SELEX has great potention in the researches of leukemia.This paper systematically summarized the advantages of CELL-SELEX,the application in specific leukemia diagnosis,targeted therapy and the discovery of cancer biomarkers.(Chin J Lab Med,2013,36:377-379)

Objective To investigate the relationship between cysteine-rich protein 61 ( Cyr61 ) and phosphatidylinositol 3-kinase ( PI3K ) signal pathway on cell proliferation and apoptotic in human ovarian carcinoma cells.Methods Recombinant human Cyr61 (rhCyr61) was pretreated with ovarian carcinoma cells.The expression of Cyr61 protein was detected by confocal spectral microscopy.Then treated the ovarian carcinoma cells with PI3K transduction inhibitors (LY294002) for 24 hours.Cell apoptosis was detected by flow cytometry (FCM).Cell viability was determined by methyl thiazolyl tetrazolium (MTT) method.The mRNA expressions of Cyr61,the protein levels of protein kinase B ( PKB),phospho-PKB and Cyr61 were assaved by real time-PCR and western blot analysis,respectively.Results The Cyr61 and phospho-PKB protein expression in two ovarian carcinoma cells (OV2008 and OVCAR-3 ) were increased in rhCyr61pretreated group.The decreasing of cell apoptosis [ ( 1.4 ±0.9)％,(2.1 ± 1.0)％ ] and increasing of cell proliferation [ ( 124.0 ± 1.8)％,( 133.0 ±2.2)％ ] was detected in the same time,compared with negative control group,there were significant difference ( P ＜ 0.05 ).After exposed to LY294002 for 24 hours,the apoptosis rate of OV2008 and OVCAR-3 in pretreated with rhCyr61 group exposed to LY294002 were (21.1 ± 1.6)％ and (26.4 ± 1.5 )％,respectively.Cells viability [ (59.0 ± 2.3 )％,(51.0 ± 2.0)％ ]was also significantly decreased in OV2008 and OVCAR-3 pretreated with rhCyr61 cells.Meanwhile,the mRNA expressions of Cyr61 (3.2 ± 0.8,6.2 ± 1.1 ) and the protein levels of phospho-PKB and Cyr61 were greatly decreased.Compared with negative control group,there were significant difference in OV2008 and OVCAR-3 cells (all P ＜ 0.0l ).Conclusions The activation of PI3K intracellular signaling pathways may lead to up-regulation of Cyr61 expression.Block PI3K signal pathway could significantly inhibit the expression of Cyr61,and may promote the apoptotic effects and inhibit the cell growth of ovarian carcinoma cells.

Objective To explore the clinical characteristics and treatment of infants with cytomegalovirus(CMV)pneumonia.Methods The clinical and auxiliary examination data of 24 patients with CMV pneumonia,which were diagnosed by detection of serum CMV-IgM used enzyme immunodot technique.All patients were treated with ganciclovir (GCV).Results The most common clinical manifestations of CMV pneumonia were cough,breathlessness,fever,crackles and wheezing rale.Chest X-ray findings predominately revealed increased and thickened bilateral lung markings and patchy areas of increased opacity in both lungs.Sixteen cases were cured,8 cases improved.Conclusions Clinical manifestations of infant CMV pneumonia lack specificity.The presence of serum CMV-IgM antibody is a laboratory diagnostic evidence.GCV is the best choice of drug in treatment of infants with CMV pneumonia.

Objective:To study the clinical efficacy of acupuncture for ischemic stroke and its effect on ET-1 levels in IS cases.Method:The 63 cases were randomized into a treatment group (31 cases),receiving acupuncture and routine method,and control group (32 cases),receiving routine method alone.Seven days constitute a course of treatment,a 2-day interval between two courses.The clinical efficacy and ET-1 level in two groups were compared after four weeks.Result:The total effective rate in the treatment group and control group were 96.8% and 75% respectively,with a statistical significance (P＜0.05);the ET-1 level in blood plasma also with a statistical significance after the treatment (P＜0.05);the pre-treatment and post-treatment ET-1 level in the treatment group showed a statistical significance (P＜0.01),whereas the control group didn't.Conclusion:Acupuncture is effective for ischemic stroke and can lower the ET-1 level in ischemic stroke cases.

The immunoregulation effect to polysaccharides from Bifidobacterium spp. was investigated on the base of functional assessment standards of health food. Effects of the EPS on immunity were investigated by promoted the proliferation of spleen lymph cells, delayed type hypersensitivity reaction, the HC50 value and macrophage function assay in mice. Data showed that the EPS could obviously increase the ratio of swallowed chicken red blood cell by macrophage and the HC50 value in mice. However, no significant effect was found on the delayed type hypersensitive induced by sheep red blood cell, for only the low dose of 100 mg/(kg?d) EPS promoted the proliferation of spleen lymph cells. Bifidobacterium spp. EPS can certain immunomodulating function.

The PBL education about the chapter of TB in microbiology for medical English-class students was conducted.The results was analyzed by questionaire,showing that PBL helps to stimulate students' learning enthusiasm and improve the comprehensive ability and enhance the teachers' awareness of the responsibility.

Objective: To explore the effect of designed experiment teaching on the experiment of medical microbiology.Methods: Designed experiment teaching method was contrasted with traditional teaching method in experiment of medical microbiology of five grades English-class students.Results: Designed experiment teaching method,superior to traditional,can stimulate the students' study enthusiasm and enhance their colligate abilities.Conclusions: Designed experiment teaching method is a successful trial of teaching reform and also an important measure to improve microbiology experiment teaching quality.

Objective To investigate the therapeutic effect of intracerebral transplantation of mesenchymal stem cells(MSCs) derived from human umbilical cord blood(UCB) on hypoxic-ischemic brain damage(HIBD) in neonatal rat.Methods Twenty samples of human UCB were collected from healthy full-term newborns.MSCs were isolated from human UCB by density gradient centrifugation and purified by adhere cell selection method.For transplantation,P3 human UCB-derived MSCs were labeled by the 5-bromo-2-deoxyuridine (BrdU).Thirty SD rats of 7 d were built for neonatal HIBD model.One rat died and others were divided into transplant group(n=18) and control group(n=11).At the third day after building models,human UCB-derived MSCs were injected into left cortex in transplant group,while PBS of the same volume was injected into the same site in control group at the same time.The seventh day after transplantation,6 rats of transplant group were sacrificed to prepare brain tissue sections.The survival,migration and differentiation of the transplanted cells were investigated by brain tissue immunohistochemical analysis,and nervous function of 2 groups were evaluated by modified neurological severity score(mNSS) on the first,7th,14th,21th and 28th day after transplantation.Results MSCs were isolated from 5 of 20 human UCB samples.Immunocytochemical analysis of brain tissue showed that the transplanted human UCB-derived MSCs could survive and migrate around by the center of transplant site.There were (12.67?2.73)% of MSCs differentiated into astrocyte-like cells.mNSS showed that the score of transplant group was lower than that of control group on the first,7th,14th,21th and 28th day,and the differences of score points between 2 groups on the 14th,21th and 28thday were statistically significant(Pa

Objective To construct a recombinant vector of sperm-specific human lactate dehydrogenase ( hLDH-C4 ), express it in Escherichia coli ( E. coli ) BL21 ( DE3 ) and utilize it in the detection of anti-sperm antibody. Methods The coding sequence of hLDH-C4 was amplified from human testis λTripIEx cDNA library, and inserted into pET-28a( + ) after restriction enzyme digestion with Hind Ⅲ and Xho Ⅰ. The resultant recombinant vector was used to transform E. coli BL21 ( DE3 ) and the His-Tag fused hLDH-C4 was expressed after induction with IPTG. Western blot was used to analyzed the recombinant protein and LDH activity of bacterial lysates was determined. An indirect ELISA method for the detection of anti-sperm antibody was established by using the recombinant hLDH-C4 as antigen matrix. Results pET-28a( + )-hLDHC was successfully established. The protein with size of 35kD could be induced by IPTG when the recombinant plasmid was transfected into E. coli BL21 ( DE3 ). Western blot showed that the recombinant protein could be specifically recognized beth by anti-His tag monoclonal antibody and by rabbit anti-human LDH-C4 antibody. In addition, the recombinant protein showed high-level LDH activity when the bacterial lysate after IPIG induction was used to check LDH activity. The recombinant hLDH-C4 was confirmed when it was used in indirect EL1SA to detect anti-hLDH-C4 antibody. Conclusions The coding sequence of hLDH-C4 is cloned into the vector pET-28a( + ) and recombinant hLDH-C4 was expressed at a high level in E. coli. The recombinant hLDH-C4 is useful in the detection of anti-sperm antibody.

Objective To evaluate the value of the thumper cardiopulmonary resuscitator in the emergency cardiopulmonary resuscitation(CPR).Methods Fifty cardiac mspiratory sudden stop patients with thumper cardiopulmonary resuscitator from January 2004 to December 2007 were recruited into treatment group,and 80 cardiac respiratory sudden stop patients with barehanded CPR from May 2000 to December 2003 were recruited into control group.The SBP and blood oxygen saturation 5 to 10 minutes after the resuscitation was compared.The rate of restoration of spontaneous circulation(ROSC),hospitalization and the complication in the two groups was compared.Results The treatment group was better than the control group in improving the SBP and blood oxygen saturation(P＜0.05).The rates of ROSC and hospitalization in the treatment group were higher than those in the control group(44%,40%and 25%,21%).P＜0.05.The rate of complications had no significant difference between the two groups.Conclusions Thumper cardiopulmonary resuscitator Can surmount the factors of medical staff or patients.It can make the CPR more standard andmore effective.MeanwhileitCan raisethe SBP,strokevolume and blood supplv to the heart and brain,and then mcrease the successful rate of CPR.