Objective To assess clinical safety and effect of intracoronary transplantation of autologous bone marrow cells in patients with acute myocardial infarction(AMI).Methods Eighty four AMI patients who had received emergency thromblysis or primary PTCA were enrolled in this study.Elective PCI was undergone in these patients 10-14 days after infarction.During the procedure,50 patients received introcoronary transplantation of autologous bone marrow derived mononuclear cells and the other 34 patients received normal saline as control.All patients achieved TIMI Ⅲ flow after PCI.Dobutamin stress echocardiography,SPECT and F-18-Fluorodeoxyglucose-PET were performed 1 day before and 6 months after the transplantation.All patients finished a 2-year follow up and stress echo examination.Twenty nine patients from the transplantation group and 22 patients from the control group accepted 6-month SPECT reassessment.Results No major adverse events were recorded in all patients who received autologous bone marrow cells transplantation during follow up.Less nitroglycerin usage and increased excercise were observed in the transplantation group.Stress echocardiography showed improvement in LVEF(27.00%?0.89% pre-operation,36.80%?0.58% after 6 months and 40.94%?0.58% after 2 years,P

OBJECTIVE To investigate the drug-resistance and the existence of genes in 16S rRNA methylases and aminoglycoside modifying enzymes in strains continuously isolated from Pseudomonas aeruginosa(PAE) in two hospitals of Jiangsu and Zhejiang Provinces.METHODS The drug-resistance of the strains continuously isolated from PAE was detected with K-B test,five kinds of genes in 16S rRNA methylases(rmtA,rmtB,rmtC,rmtD and armA) and six kinds of aminoglycoside modifying enzymes [aac(3)-Ⅰ,aac(3)-Ⅱ,aac(6′)-Ⅰb,aac(6′)-Ⅱ,ant(3″)-Ⅰ and ant(2″)-Ⅰ] were detected by PCR.RESULTS The strains were just sensitive to cefoperazone/sulbactam,imipenem,meropenem and amikacin(hospital A:74.2%,80.0%,82.9% and 68.5%;hospital B:90.0%,50.0%,50.0% and 95.0%,respectively).There was a high rate in the drug-resistance to ?-lactamase medicines,ciprofloxacin and sulfamethoxazole co.Genes in 16S rRNA methylases were not detected from PAE strains in the two hospitals.CONCLUSIONS The rates of genes in aminoglycoside modifying enzymes detected from strains in continuously isolated from PAE are different in different hospitals.

OBJECTIVE To investigate the antibiotic resistance and the genetical marks in Pseudomonas aeruginosa(PAE) strains in two hospitals of Jiangsu and Zhejiang.METHODS The drug-resistance in PAE strains was detected with K-B test,four kinds of genetical marks of integron and transposon(qacE△1-sul1,mer,tnpA and tnpU) were detected by PCR.RESULTS The strains were only sensitive to cefoperazone/sulbactam,imipenem,meropenem and amikacin.There was a high resistance rate to ?-lactamases,ciprofloxacin,and sulfamethoxazole.Genes of qacE△1-sul1(48.6%,45.0%) and merA(11.4%,5.0%) were detected from PAE strains in the two hospitals.There were no tnpA and tnpU too.CONCLUSIONS Multiple-drug-resistance in Pseudomonas aeruginosa(PAE) strains is caused mainly by qacE△1-sul1 and merA.

OBJECTIVE To detect the disinfectants-resistant gene of qacE-sul1 in nosocomial infected patients.METHODS The disinfectants-resistant gene of qacE-sul1 was detected by polymerase chain reaction(PCR).RESULTS The positive rate of gene of qacE-sul1 in 222 strains was 54.5%.The positive rate of gene qacE-sul1 in Klebsiella pneumoniae,Escherichia coli,Staphylococcus aureus,Proteus,Pseudomonas aeruginosa,Enterococcus,and Acinetobacter baumannii were 47.6%,58.3%,57.6%,54.2%,53.6%,53.3%,and 55.0%,respectively.CONCLUSIONS There are higher positive percentages of gene qacE-sul1 in nosocomial infected patients which possibly causes nosocomial infection and should be attention to.

Objective To analyze the cognitive changes and influencing factors in patients with lacunar cerebral infarction after carotid artery intervention therapy. Methods Sixty lacunar cerebral infarction combined with carotid stenosis patients treated with artery intervention therapy (intervention therapy group) and 68 lacunar cerebral infarction without carotid stenosis patients treated with drug therapy (drug therapy group) were selected. The neuropsychological test was completed at entry and 1, 6, 12 months after entry, and the results were compared with 60 healthy controls (control group). The cognitive changes were observed. The neuropsychological test included mini mental state examination (MMSE), Montreal cognitive assessment scale (MoCA) and cognitive field test. Results There were statistical differences in other scores except the Stroop test C section and Wechsler adult intelligence scale (WAIS-RC) picture arrangement subtest at entry in intervention therapy group and drug therapy group compared with control group (P<0.05). There were no statistical differences in the all scores at entry between drug therapy group and intervention therapy group (P>0.05). In intervention therapy group, the MMSE scores, MoCA total score, Rey-Osterrieth complex figure test (ROCFT), auditory verb learning test (AVLT), and the WAIS-RC picture arrangement subtest, verbal fluency test, WAIS-RC digit span backwards subtest of performing function 12 months after entry were significantly better than those at entry, and there were statistical differences (P<0.05). MMSE score, MoCA total score, long-time delayed recall of ROCFT, the immediate recall, long-time delayed recall and short delayed recall of AVLT, semantic category fluency test of performing function and digit span backwards subtest of WAIS-RC 6 months after entry were significantly better than those at entry:(27.8 ± 2.2) scores vs. (26.4 ± 1.9) scores, (20.7 ± 2.3) scores vs. (19.3 ± 2.0) scores, (12.4 ± 3.2) scores vs. (10.8 ± 2.6) scores, (54.3 ± 10.6) scores vs. (49.9 ± 10.9) scores, (12.4 ± 2.0) scores vs. (11.2 ± 2.8) scores, (12.9 ± 2.0) scores vs. (10.6 ± 2.6) scores, (17.5 ± 4.0) scores vs. (15.4 ± 3.4) scores and (4.0 ± 0.9) scores vs. (3.5 ± 0.9) scores, and there were statistical differences (P<0.05). In drug therapy group, there were no statistical differences in the all scores 1 and 6 months after entry, compared with that at entry (P>0.05);the MMSE score, MoCA total score, ROCFT, the immediate recall, long-time delayed recall and short delayed recall of AVLT, WAIS-RC picture arrangement subtest, verbal fluency test, WAIS-RC digit span backwards subtest of performing function and digit span backwards subtest of WAIS-RC 12 months after entry were significantly better than those at entry, and there were statistical differences (P<0.05). There were no statistical differences in all scores 12 months after entry between intervention therapy group and drug therapy group (P>0.05). In patients intervention therapy group, Logistic regression analysis showed that the MoCA score was related with age, hypertension and low education level (P<0.01 or<0.05), but was not related with smoking, diabetes and interventional treatment (P>0.05). Conclusions Cognitive impairment in patients with lacunar cerebral infarction and carotid stenosis is severe and extensive, but most cognition disorders can improve to normal level 12 months after artery intervention therapy.

s and no restenosis was found in 3 patients according to cerebral angiography. Preliminary results show that PTAS in the management of the vertebrobasilar arterial stenosis is a safe and effective method.

Objective To explore the apoptosis effect of docetaxel combined gamma knife on hepatoma cell SMMC-7721 subcutaneous xenograft in nude mice.Methods Subcutaneous xenogyaft models were constructed and were divided into two groups:control group and experimental group.The experimental group was treated with docetaxel 60ug/0.3ml once every 3 days for 6 times and gamma irradiation once every other day for 6 times (with indoor temperature of 137Cs radiation source irradiating the tumor and of fractionated schedule 5Gy with the total dose of 10Gy every time).The control group was treated with physiological saline with the same dose of 60 ug/0.3 mL.Tumor growth was observed.Tumor samples were cut 30 days after the treatment and TUNEL was used to detect the apoptosis of tumor cells.Results Tumor growth rate in experimental group significantly slowed down.Apoptotic index in experimental groups was significantly higher than that in control group (P ＜ 0.05) Cornclusion Docetaxel combined gamma knife can inhibit the growth of hepatocellular carcinoma in nude mice.

Objective To knock out Asxl2 gene in murine embryonic fibroblast cell line NIH3T3 using CRISPR/Cas9n system. Methods A pair of sgRNAs which targeted exon 5 of Asxl2 gene were designed and subcloned into the pX462 vec?tor. The recombined plasmids were verified by sequencing and transfected into NIH3T3 cell line. Single cells were isolated through serial dilutions, followed by an expansion period to obtain new monoclonal cell lines. The genomic DNA of the new monoclonal cell lines was extracted and a DNA fragment flanked the target site was amplified by genotyping PCR then se?quenced. Lastly, western blotting were applied to confirm whether Asxl2 was successfully knocked out. Results The CRIS?PR/Cas9n plasmids that targeted Asxl2 were successfully constructed. NIH3T3 cells were co-transfected with the two recom?binant constructs. After puromycin selection, subclonal cell lines were obtained and one of them was validated by genotyping PCR-sequencing. Western blotting also confirmed that Asxl2 was completely depleted in the NIH3T3 cell line. Conclu?sion CRISPR/Cas9n plasmids that targeted Asxl2 were successfully constructed therefore a Asxl2 knockout NIH3T3 stable cell line was established via this system.

BACKGROUND: Nerve growth factor is secreted and synthetized by a variety of cells, such as inflammatory calls and repairing calls, its biological effects are diverse and closely related to the process of wound repair, but its mechanism is not yet clear.OBJECTIVE: To observe the influence of nerve growth factor on the biological characteristics of scar fibroblasts.METHODS: Eight clinical surgical resection specimens, including 5 face and neck hyperplastic scar or keloid specimens, did not receive any treatment; three were prepuce specimens following circumcision (normal tissue). By use of tissue block method, the scar and normal skin fibroblasts were cultured, followed by digestion passage. The scar tissue and normal tissue flbroblasts at 3-6passages in the logarithmic phase were seeded in 96-well plate and divided into the experimental group (scar flbroblest group) and the control group (normal skin fibroblasts group), with two parallel holes in each group were added with 3,33, 0.33 mg/L nerve growth factor, 50 μL. Inverted microscope was used to observe fibroblast morphology. At 24, 48, 72 hours after culture, the absorbanca value was measured using MTT. Fibroblast DNA content and cell apoptosis were determined by flow cytometry.RESULTS AND CONCLUSION: The fibroblasts were adherent cells, the scar and normal skin tissues were shown to cell free out of tissue block and gradual expansion at 4-6 days after incubation. Compared with normal skin fibroblasts, the pathological scar fibroblasts became larger, irregular shape and arrangement. MTT results showed that nerve growth factor could promote the normal and hypertrophic scar fibroblasts growth, which becomes more apparent. Flow cytometry results showed that by adding nerve growth factor, the percentage of scar fibroblasts at proliferating S-G_2-M phase was higher than that in the control;group; with a Iower level of apoptosis. It is indicated that nerve growth factor plays an obviously promoting role on normal and scar skin fibroblasts growth and proliferation, especially on the scar skin.

BACKGROUND: Primary studies suggest that coronary artery stenosis is highly exactly shown by 16-slice spiral CT coronary artery imaging.OBJECTIVE: To compare the accuracy and limitation between coronary angiography and multi-slice computed tomography (MSCT) coronary artery imaging to diagnose moderate and severe coronary artery stenosis. DESIGN, TIME AND SETTING: Clinical diagnostic study based on gold standard, which was carried out in the Department of Cardiology, Xuanwu Hospital, Capital Medical University from June 2005 to March 2006. PARTICIPANTS: Twenty-eight patients with suspected coronary arteriosclerotic heart disease were examined by 64-slice spiral CT coronary artery imaging and coronary artery angiography during the 1-month hospitalization in the Department of Cardiology, Xuanwu Hospital, Capital Medical University from June 2005 to March 2006. METHODS: 280 segments of 28 patients were quantitatively analyzed coronary artery stenosis by selective coronary artery angiography and multi-slice spiral CT imaging based on eye-measurement diameter method. MAIN OUTCOME MEASURES: True positive, true negative, false positive, false negative, sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of coronary artery stenosis were measured by multi-slice spiral CT imaging.RESULTS: All 28 patients were included in the final analysis. Multi-slice spiral CT imaging showed that the sensitivity, specificity, positive predictive value, and negative predictive value were 46.5%, 97.6%, 86.8%, and 84.3%, respectively. If excluding the effect of 31 coronary segments with severe calcification, the sensitivity, specificity, positive predictive value and negative predictive value were 66.7%, 98.6%, 90.3% and 93.6%, respectively.CONCLUSION: Multi-slice spiral CT imaging is simple, reliable, noninvasive and safe; moreover, it has a good potential for diagnosing especially excluding coronary arteriosclerotic heart disease, but still some limits.