Finite element analysis of the effect of the distribution position and content of bone cement on the stress and displacement of reverse femoral intertrochanteric fracture / 中国组织工程研究

BACKGROUND:The proximal femoral nail antirotation is the preferred treatment for reverse osteoporotic intertrochanteric fractures.Bone cement enhancement can reduce the probability of proximal femoral nail antirotation cut-out and cut-through,but there are no relevant biomechanical studies demonstrating the effect of bone cement content and location on the stress and displacement of the fracture end. OBJECTIVE:To investigate the effects of different contents and locations of bone cement in cement-reinforced proximal femoral nail antirotation on stress,strain,and displacement of reverse osteoporotic femoral intertrochanteric fractures in the elderly by finite element analysis. METHODS:A healthy adult female right femur model was extracted by Mimics software and smoothed in Geometric software.Five types of internal fixation methods of proximal femoral nail antirotation(cementless,cephalic spherical 1 mL,cephalic spherical 2 mL,cephalic spherical 3.4 mL,and cylindrical 5 mL around spiral blade)and femoral intertrochanteric fracture(AO subtype 31-A3.1 type)model were established in Solidworks software.After assembly,the total stress distribution,peak stress and displacement of the five models of implants with the femur were compared in Ansys software. RESULTS AND CONCLUSION:(1)The peak stresses of proximal femoral nail antirotation with head-end spherical 1 mL,head-end spherical 2 mL,head-end spherical 3.4 mL,and cylindrical 5 mL enhanced proximal femoral nail antirotation around the spiral blade respectively were 571.07 MPa(located at the junction of the spiral blade and the main nail),495.45 MPa(located at the junction of the spiral blade and the main nail),467.20 MPa(located at the junction of the main nail and the distal screw connection),642.70 MPa(located at the junction of the main nail and distal screw connection),and 458.58 MPa(located at the junction of the spiral blade and the main nail).(2)The maximum displacements of proximal femoral nail antirotation with head end sphere 1 mL,head end sphere 2 mL,head end sphere 3.4 mL,and with cylindrical 5 mL enhancement around the spiral blade were 9.260 5,7.589 1,7.316 8,6.790 7,and 6.615 7 mm,respectively,all of which were located at the proximal end of the femoral head.(3)These findings revealed that for reverse femoral intertrochanteric fractures treated with proximal femoral nail antirotation,the bone cement enhancement had significant mechanical stability compared with no enhancement,and the enhancement of the spiral blade 5 mL around the perimeter was the best,which is more preferable for aged unstable intertrochanteric fractures.

Kinesin Family Member 11 Enhances the Self-Renewal Ability of Breast Cancer Cells by Participating in the Wnt/β-Catenin Pathway / 한국유방암학회지

Analysis of hematological characteristics of patient with different genotypes in lightβ-thalassemia / 实用医学杂志

Objective To investigate the hematological characteristics of patients with light β- thalassae-mia and rapidly identify different mutational genotypes. Methods RBC、Hb、MCV、MCH、MCHC、RDW-CV and HbA2 were studied in the 646 patients,the differences between β0/βN and β +/βN mutations were also compared. Results Most of them were microcytic hypochromic anemia. The most common genotype were β654/βN(33%)、β41-42/βN(32.5%)、β17/βN(14.4%)、β - 28/βN(10%)respectively,β0/βN were relatively higher. The differences in RBC、MCV、MCH、RDW-CV and HbA2 were significant between β0/βN and β +/βN. Compared with β +/βN patients,the MCV and MCH of β0/βN were significantly reduced,RDW-CV and HbA2 were significantly higher. Conclusion Light β- thalassaemia with different genotypes has its own unique hematological features and can be quickly and ef-fectively identified. Clinical efficiency can be improved through hematological analysis.

Study of the anemia status and genotype of thalassemia in preschool children in Shenzhen / 实用医学杂志

Objective To study the anemia status and genotype of thalassemia in preschool children in Shenzhen. Methods 658 preschool with anemia hospitalized in Shenzhen Longgang Maternal and Child Health Hospital from October 2012 to September 2015 were screened by complete blood analysis . The most common mutations of thalassemia genotype (17 β thalassemia genotype mutation,3 α thalassemia genotype mutation and 3α thalassemia genotype absence change) in Chinese population were detected. Results All cases have microcytic hypochromic anemia. 426 cases were identified to be thalassemia (64.7%). 23 genotypes and 13 gene mutation type were detected. The most common genotype type were SEA/αα(46%),β654/βN(15%),β41?42/βN(12.7%). And the most common allele gene mutation type were SEA (49.1%),IVS?Ⅱ?654( C→T)(14.4%),CD41?42(?TTCT)(12.4%) re?spectively. MCV and MCH of thalassemia children was significantly lower than that of children diagnosed as without thalassemia. The differences of RBC,Hb,MCV,MCH,MCHC,RBC?SD between the two groups were statistical?ly significant. Conclusion The proportion of thalassemia among preschool anemia children in Shenzhen area was high,and it is necessary to strengthen the local thalassemia prevention and decrease anemia effect on preschool children′s health.

Effect of miR-320a up-regulation on apoptosis and migration of Bel-7402 cells induced by ribonucleic acid Ⅱ / 中国药理学通报

Aim To investigate the effect of miR-320a up-regulation on the apoptosis and migration of Bel7402 cells induced by ribonucleic acid Ⅱ.Methods The different expression levels of miR-320a in normal liver cells and hepatocellular carcinoma (HCC) cells were detected by qRT-PCR.Bel-7402 cell was transfected with miR-320a mimic,and the miR-320a expression levels were measured by qRT-PCR.The effect of ribonucleic acid Ⅱ on proliferation of Bel-7402 and Bel-7402-miR-320a cells was measured by CCK-8 assay,and cell cycle and apoptosis were detected by flow cytometry.The migration and invasion ability of ribonucleic acid Ⅱ on Bel-7402 cells were tested by Transwell method.The expression of p53,Cyclin D1,Bax,Bcl-2,MMP-3 proteins were examined by Western blot.Results miR-320a expression levels in HCC cell line Bel-7402 were significantly lower than those in normal cell line HL-7702.Bel-7402 cells were successfully transfected with miR-320a mimic,named Bel-7402-miR-320a.CCK-8 showed that ribonucleic acid Ⅱ could effectively inhibit the proliferation of Bel7402 and Bel-7402-miR-320a cells in vitro in a dosedependent manner at the range of 100,200,300,400,500 mg · L-1.The IC50 of ribonucleic acid Ⅱexposure on Bel-7402 and Bel-7402-miR-320a cells for 12 h and 24 h was 250,200 mg · L-t and 150,120 mg · L-1,respectively;flow cytometric analysis indicated that over-expression of miR-320a could arrest Bel-7402 and Bel-7402-miR-320a cells induced by ribonucleic acid Ⅱ in G0/G1 phase,and promote the apoptosis of HCC cells.Transwell method showed that Bel-7402-miR-320a + Ribonucleic acid Ⅱ group could significantly inhibit the migration of HCC cells compared with control group and Bel-7402 + Ribonucleic acid Ⅱ group.Western blot results showed that the expression of p53,Bax proteins increased,while the Cyclin D1,Bcl-2,MMP-3 proteins were down-regulated in Bel-7402 and Bel-7402-miR-320a cells induced by ribonucleic acid Ⅱ.Conclusions The expression of miR-320a is lower in HCC cells than that in normal cell line.While ribonucleic acid Ⅱ could promote the apoptosis of liver cancer cells by arresting the cell cycle protein expression of Cyclin D1,activating p53 signaling pathway,down-regulating Bcl-2,up-regulating Bax and destroying Bcl-2/Bax proportions,and inhibiting the migration and invasion of HCC cells by downregulating MMP-3.Overexpression of miR-320a could increase the sensitivity and boost the pharmacological effects of ribonucleic acid Ⅱ on HCC cells.

Prenatal diagnosis of unbalanced reciprocal translocations at the second trimester / 实用医学杂志

Objective To explore the distribution of prenatal indications , clinical features and pregnant outcomes of chromosomal unbalanced reciprocal translocations atthe second trimester. Methods The data on 35 fetuses with unbalanced reciprocal translocations between May 2011 and March 2016 were retrospectively analyzed and reviewed. Results Of 35 fetuses with unbalanced translocations , 29 (82.86%) showed ultrasound abnormalities,and 6 (17.14%) had no significant clinical features. 8 were de novo, and the other 27 were parental inherited. All the 35 women had to terminate the pregnancy. Conclusions Ultrasound abnormalities are associated with chromosomal unbalanced reciprocal translocations at the second trimester , and most unbalanced translocations fetuses origin from parental carrier of balanced translocations.

Analysis of balanced translocation at amniocentesis on prenatal diagnosis / 实用医学杂志

Objective To explore the prenatal indications and pregnant outcome of balanced transloca-tion at amniocentesis, so as to provide scientific guidelines of prenatal diagnosis for local pregnant women. Methods Retrospective review was made on 76 cases of balanced translocation at amniocentesis from 2011 to 2015 at our hospital. Results In 76 cases, 38 cases were aged pregnancy prenatally, 20 cases carriers, 9 cas-es abnormal serum screening , 5 cases with previous abnormal births , 2 cases with abnormal ultrasound findings and 2 cases with other problems. Conclusion Balanced translocation concomitant aneuploidy , de novo X-auto-some translocation or de novo complex chromosome rearrangements can cause fetal abnormalities on prenatal di-agnosis. The results of ultrasound, FISH and array-CGH could provide for de novo simple translocation at amnio-centesis.

Analysis of the group A rotavirus infection in children with diarrhea in Shenzhen / 国际检验医学杂志

Objective To investigate the epidemiological characteristics of the group A rotavirus (RV) among the children with diarrhea in Shenzhen ,in order to provide reference for clinical diagnosis and treatment .Methods Stool samples were collected for RV detection from children with diarrhea .The results were analyzed .Results A total of 3 509 cases of children with RV infection were checked out from 14 511 cases of children with diarrhea ,with the infection rate accounting for 24 .18% .RV infection occurred all year around ,and the infection peak was November ,December and January .RV infected children mainly distributed in the age group of 6 months to 2 years .Conclusion RV infection in children is a universal problem in Shenzhen .Clinic should pay attention to it .

Study on flavonoid chemical constituents contained in Memorialis hirta / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Memorialis hirta.</p><p><b>METHOD</b>Compounds were isolated and purified by multiple methods, and their structures were identified based on physicochemical property and spectrum data.</p><p><b>RESULT</b>12 compounds were isolated from ethyl acetate from 95% ethanol extracts of M. hirta, they were isorhamnetin (1), kaempferol (2), quercetin (3), isorhamnetin-3-O-alpha-L-rhamnopyranoside (4), kaempferol-3-O-alpha-L-rhamnopyranoside (5), isorhamnetin-3-O-beta-D-glucopyranoside (6), kaempferol-3-O-beta-D-glucopyranoside (7), quercetin-3-O-alpha-L-rhamnopyranoside (8), quercetin-3-O-beta-D-glucopyranoside (9), isorhamnetin-3-O-rutinoside (10), kaempferol-3-O-rutinoside (11) and quercetin-3-O-rutinoside (12), respectively.</p><p><b>CONCLUSION</b>All compounds were obtained from the genus Memorialis for the first time.</p>

Clinical pharmacokinetics of cisatracurium / 中华麻醉学杂志

Objective This study was designed to determine the clinical pharmacokinetics ofcisatracurium in Chinese patients. The purpose of this study was twofold: the determination of ED50 and ED95 of cisatracurium and the intubating conditions and changes in BP and HR produced by 2×ED95 and 3 ×ED95 . Methods 100 patients scheduled for elective surgery, aged 30-65 years, served as the experimental subjects. Anesthesia was induced with propofol 2mg/kg and fentanyl 4μg/kg. 5 min after BP and HR were stabilized the study was started. The study consisted of two parts according to the purpose of the study. In part Ⅰ 70 patients were included and randomized to 7 groups based on the doses of cisatracurium the patients received. The doses were 25, 30, 35, 40, 45, 50 and 55 μg/kg from group Ⅰ to Ⅶ. Neuromuscular transmission was assessed by measuring the responses of adductor pollicis muscle to stimulation of ulnar nerve with TOF pulses.The maximal depression of Tt was measured after administration of cisrtracurium, and ED50 and ED95 were calculated. In part Ⅱ 30 patients were included and divided into two groups to receive 2×ED95 (group Ⅷ ) or 3×ED95 (group Ⅸ ) of cisatracurium. The intubating conditions were evaluated. The onset time and time of recovery from paralysis as well as the changes in BP and HR after administration of cisatracurium were recorded. ResultsED50 and ED95 for cisatracurium were 30.7μg/kg and 53.4μg/kg respectively. The onset times for 2×ED95 and 3×ED95 were (254±84)s and (190±59)s. The durations of action was (38.8±6.1)min and (53.28.8)min respectively. Recovery indexes were (16.4±4.9) min and (15.6±5.2) min. There were little changes in BP and HR after administration of cisatracurium in both group Ⅷ and Ⅸ. The intubating conditions were not significantly different. ConclusionsED50 and ED95 for cisatracurium are 30.7μg/kg and 53.4μg/kg in Chinese patients. The onset time is shorter and duration of action longer with 3×ED95 which does not significantly affect BP and HR.