BACKGROUND:Previous studies have found that the expression level of miR-486 in glioma stem cels (CD133+) is significantly down-regulated compared with that in glioma non-stem cels (CD133-), but the effect of down-regulation of miR-486 on CD133+ cels remains unclear . OBJECTIVE: To explore the effect of miR-486 on CD133+ cels. METHODS:CD133+ glioma stem cels and CD133- glioma cels were separated from U87 cels by flow cytometer. miR-486 overexpression glioma stem cels were constructed by lipofection transfection. RESULTS AND CONCLUSION:After sorting and purification, the content of the CD133+ fraction was enriched up to 83.5%. The expression level of miR-468 in CD133+ glioma stem cels was obviously down-regulated compared with that in CD133- glioma cels. CD133+ glioma stem cels overexpressing miR-486 were fabricated successfuly. Results from in vitro experiments showed that miR-486 overexpression could dramaticaly decrease the proliferation of glioma stem cels, induce a cel cycle arrest in G1/S phase for CD133+ glioma stem cels and promote cel apoptosis. These findings suggest that miR-486 can be a suppressor of glioma stem cels, which offers a novel potential therapeutic target for glioma stem cels and human glioma.

The all-in-one femtosecond laser corneal refractive surgery,especially small incision lenticule extraction (SMILE),has gained more and more attention in clinic,because of its small incision,“no flap” and corneal biomechanical stability advantages.However,like any other kind of corneal refractive surgery,the all-in-one femtosecond laser refractive surgery not only exists its clinical advantages,but also has its limitations.It is very important to put into perspective clinical advantages and limitations of all-in-one femtosecond laser corneal refractive surgery.

Objective To investigate the relations between BNP and cTnI leveh in patients with CHF and cardiac function.Methods 75 patients with CHF were selected as observation group and another 30 healthy people were selected as control group.BNP and cTnI levels were detected by electrochemiluminescence immunoassay and the data were analyzed.Results BNP and cTnI of observation group were significantly higher than control group,the difference was statistically significant(t=3.897,4.127,all P＜0.05);comparison of BNP and cTnI levels in different classification of cardiac function of observation group had significant difference(F=4.765,5.876,allP＜0.05);Linear corrlation analysis showed that:BNP and cTnI both positively correlated to classification of cardiac function(r=0.853,0.647,all P＜0.05),BNP and cTnI increased significantly with the increase of cardiac function classification.Conclusion BNP and cTnI increased significantly in patients with CHF and closely related with cardiac function.they were ideal index to evaluate the CHF severity and had a good clinical value to judge the status and function of heart in patients with CHF.

10.3969/j.issn.2095-4344.2013.25.021

Objective To evaluate the safety of CT guided percutaneous lung biopsy in the elderly,and to analyze the risk factors for its complications.Methods Totally 204 elderly patients aged ≥65 years underwent transthoracic needle biopsy under CT guidance.Clinical data,complication and its risk factors were analyzed retrospectively.Results The complications included pneumothorax accounting for 15.2％ (31/204),hemoptysis 21.6％ (44/204),and no mortality was found.Logistic regression analysis showed that needle path ≥5.00 cm,lesion size ≤2.00 cm and emphysema around the lesion were the independent risk factors for postoperative pneumothorax (OR=4.05,2.54 and 3.97,all P＜0.05).Meanwhile,the enhancement degree by CT ＞40 HU,needle path ≥5.00 cm and lesion size ≤2.00 cm were the independent risk factors for postoperative bleeding (OR=2.27,2.82 and 2.33,all P＜0.05) in elderly patients undergoing lung biopsy.The sensitivity and specificity for postoperative pneumothorax and bleeding obtained by forecasting equation were 87.1％ and 49.1％,54.5％ and 80.8％ respectively.Conclusions The length of needle path,lesion size and emphysema around the lesion are correlated with pneumothroax,and length of needle path,lesion size and the CT enhancement degree are correlated with bleeding after percutaneous lung biopsy in the elderly.

Objective To evaluate the association between stress hyperglycemia and clinical out-comes among patients with and without diabetes mellitns admitted to medical intensive care unit (MICU).Methods We reviewed the medical ICU records of 1016 consecutive patients admitted to Wu Han Univer-sity Ren Min Hospital. According to admission glucose level, 126 patients with debates and 890 patients without known debates were divided into group 1 ( <6 mmol/L), group 2(6 ～ 8mmol/L), group 3(8 ～10mmol/L), and group 4( > 10mmol/L). The primary end point of the study was in-hospital mortality. Secondary end points included length of hospital stay, length of ICU stay, the ratio of mechanical ventila-tion, blood transfusions, antibiotics and blood glucose treatment. Results The hospital mortality among patients without a history of diabetes mellitus was 4. 7%, 12. 1%, 20. 5%, 30. 3% in group 1, 2, 3, 4,respectively. The ratio of mechanical ventilation, blood transfusions, and antibiotics increased progressively as glucose values increased. Conclusions Hyperglycemia was a common disease, and it may be an impor-tant marker of poor clinical outcome and mortality in patients without history of diabetes.

OBJECTIVETo evaluate the effect of taper and inserting angle on stability of micro-implants in type II bone and to provide theoretical evidence for clinical selection of taper and inserting angle.

METHODSThree-dimensional finite element models of type II bone sections and micro-implants were fabricated. They were designed using different tapers (diameter between 1.1 to 1.6 mm, taper between 0 to 0.0625) and different inserting angles ranging from 30 degrees to 90 degrees (30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees). Effects on the maximum von Mises stresses in mandible and micro-implants, as well as on the maximum displacements in micro-implants, were analyzed under an applied 2 N horizontal force.

RESULTSThe inserting angle had a significant effect on stresses and displacements, with lower distribution of stresses and displacements occurring at 60 degrees. The effect of the taper was also related to the inserting angle. The minimum stresses were 5.013 4 MPa (cortical bone) and 25.1310 MPa (micro-implant) in model D at 60 degrees. The displacements of micro-implants were proportional to the taper.

CONCLUSIONThe inserting angle has a significant effect on stability of micro-implants, and the recommended inserting angle is 60 degrees. The influence of taper on the stability of micro-implants is related to the inserting angle. The micro-implant with 0.0375 taper (maximum diameter is 1.6 mm, minimum diameter is 1.3 mm) is more suitable for type II bones.

Anticonvulsants ; adverse effects ; Body Weight ; drug effects ; Epilepsy ; drug therapy ; Female ; Fructose ; adverse effects ; analogs & derivatives ; Humans ; Infant ; Male

Objective This study aims to study the characteristics of intonation pronunciation in preschool children with hearing impairments .Methods A total of 30 of 4~5 years old children with hearing impairment and 30 of 4~5 years old children with normal hearing were enrolled in this study .With statement intonation and ques-tion intonation as test material ,the compartment between the children in two groups were obtained .Results Pre-school children were generally increased the ending point and slope to distinguish statement intonation .There were still differences between hearing -impaired children and normal children .Under statement intonation condition :the children with hearing impairments showed a significantly lower level of the slope of the high and level boundary tone than the normal children ,the starting point and the ending point of the falling boundary tone in hearing -impaired children were significantly lower than those of in normal children ;Meanwhile ,under question intonation condition :com-pared with normal children ,the slope of the high and level boundary tone ,the rising boundary tone and the falling -rising boundary tone in hearing -impaired children were significantly lower .The starting point ,the ending point ,the high and level boundary tone ,and the falling boundary tone in hearing -impaired children were significantly lower .Conclusion To implement targeted therapy during question intonation training for hearing -impaired children ,the acoustics characteristics of boundary tone are required to assess and monitor the effectiveness of rehabilitation .

Objective To investigate the electrophysiological characteristics of the ventralis intermedius nucleus (Vim) in order to find an easy and safe way to confirm the target in Vim-thalamotomy. Method In microelectrode-guided selective Vim-thalamotomy for 23 Parkinson's disease patients, the background activity, amplitude and discharge frequencies of Vim were compared with its surrounding structures. The response of kinesthetic neuron and tremor cell to microstimulation was also compared. Result There were differences in backgroud activity and discharge amplitude for Vim, ventralis lateralis nucleus (VL), ventralis caudalis nucleus (VC), and internal capsule. Based on the response to active or passive movement of contralateral limb tremor cells were divided into two subgroups, which were different in localization. Contralateral tremor showed different response when the two subgroups of tremor cells were mircrostimulated. Conclusion The anterior border of Vim was easily found by microrecording. Only by combining microstimulation with microrecording could the posterior border of Vim and its interior and lateral ordination of target were identified exactly and safely. Kinesthetic neurons and tremor cells which responded to the movement of contralateral limbs should be destroyed.