Investigation on students' active learning behavior during independent experimental design education of medical function / 中华医学教育探索杂志

Objective:To evaluate the teaching effectiveness of independent experimental design from students' active learning behavior, and further provide the basis for advancing the reform of functional experimental teaching and teaching quality.Methods:In June 2019, 186 undergraduates (5-year-programme and 8-year-programme) of Xiangya School of Medicine were included in the teaching research. Self-administered questionnaires were applied to characterize students' active learning behavior in independent experimental design education. Spearman rank correlation analysis and Logistic regression analysis were used in the study. SPSS 23.0 was used for descriptive analysis of the data.Results:During the independent experimental design, 85.0%(158/186) of the students thought it was necessary and important to conduct independent experimental design education; 72.6%(135/186) of the students tentatively raised new scientific questions; 97.8%(182/186) of the students actively searched literature; 77.4%(144/186) of the students participated in reply positively. The value of correlation coefficient of actively learning behavior "tentatively raising new science questions" and teaching effectiveness "improving the ability of scientific thinking" was 0.81. And only 42.5%(79/186) of the students agreed that students needed to summarize after reporting.Conclusion:Independent experimental design education is welcomed and widely accepted by students, which has effectively improved the capacity for scientific research and innovation spirit of students. Whether students' active learning behavior can be fully mobilized in the education practice is closely related to the teaching effect. And the cultivation of leadership and leading consciousness still need to be improved.

Risk factors and treatment strategies for adjacent segment diseases / 中华骨科杂志

Fusion surgery has been an effective modality for the treatment of spinal disorders for more than 100 years. With the increasing understanding of the disease and the increasing maturity of surgical techniques, lumbar fusion has become more widely performed and its efficacy has been conclusively proven. However, fusion surgery inevitably disrupts the original physiologic motion of the spine and limits segmental motion, resulting in a significant increase in disc and joint protrusion stress in adjacent segments. When a newly identified degenerative change on imaging is present in an adjacent segment or an existing degeneration is more aggravated, this is known as adjacent segment degeneration. When clinical symptoms such as pain and numbness in the lower extremities are present that are consistent with degeneration, this is known as adjacent segment disease. Real world studies (RWS) have become a major focus in medical research in recent years. Since it is closer to clinical practice and more practical for decision-making compared with randomized controlled trail (RCT), it is gaining importance in clinical practice. By searching major national and international databases, this article provides a review of risk factors as well as advances in the treatment of lumbar adjacent segment disease in RWS. According to the retrieved literature, there are many factors that contribute to the development and progression of adjacent segment degeneration and disease, which are mainly divided into patient-related factors and surgery-related factors. In general, patient age, weight, spinal-pelvic sagittal parameters, and internal diseases influence the progression of adjacent segment degeneration. Surgery-related risk factors include the number of segments operated on, the surgical approach, interference with adjacent segments, and whether the spinal-pelvicsagittal imbalance is corrected. To prevent the development of adjacent segment disease, patients can slow the progression of adjacent segment degeneration by reducing their own weight and controlling their internal diseases. The physician can also avoid the influence of surgery-related factors through adequate surgical planning and careful intraoperative management. At the same time, surgeries may be performed in patients who have developed adjacent segmental disease and for whom conservative treatment has failed. The current revision surgical approaches include endoscopic simple decompression and posterior decompression with extended internal fixation.Short-term RWS revealed that the efficacy of endoscopic treatment of adjacent spondylosis might be equivalent to re-fusion internal fixation surgery. Studies with large samples and long-term follow-up are still needed to guide the treatment of adjacent segment disease in the future, in order to improve clinical decision-making.

Effect of cage height on adjacent segment degeneration during oblique lumbar interbody fusion: a 3D finite element study / 中华骨科杂志

Objective:To investigate the influence of interbody cage height during oblique lumbar interbody fusion (OLIF) on lumbar biomechanics with different degrees of degeneration and to provide a reference for cage choice.Methods:The finite element model of normal lower lumbar spine (L 3-S 1) was built and validated, then constructed three different degenerative segments in L 3, 4, and the cages with different height (8, 10,12, 14 mm) were implanted into L 4, 5 disc. All the twelve models were loaded with pure moment of 7.5 N·m to produce flexion, extension, lateral bending and axial rotation motions on lumbar spine, and the effects of cage height on range of motion (ROM), intervertebral pressure in adjacent segments and stress in facet joints were investigated. Results:The ROM of adjacent segments and the maximum stress of intervertebral discs increased with the increase of cage height, but this trend was not obvious in moderate and severe degeneration groups. After implantation of 4 different height cages (8, 10, 12, 14 mm), the ROM of L 3, 4 segment reached the maximum during extension. The ROM of mild degeneration group was 2.68 °, 2.71 °, 2.94 °, 2.98 °, moderate degeneration group was 2.33°, 2.37°, 2.41°, 2.49°, and severe degeneration group was 1.94 °, 1.99 °, 2.14 °, 2.21 °. The stress of L 3, 4 intervertebral disc reached the maximum during right bending. The maximum stress of L 3, 4 intervertebral disc was 23.95 MPa, 24.60 MPa, 24.90 MPa and 25.34 MPa in mild group, 25.57 MPa, 25.60 MPa, 25.82 MPa and 25.89 MPa in moderate group, and 25.95 MPa, 25.99 MPa, 26.48 MPa and 27.13 MPa in severe group. The maximum stress of L 3, 4 facet joint was 15.87 MPa, 15.78 MPa, 16.29 MPa and 16.43 MPa in mild group, 15.97 MPa, 16.31 MPa, 16.53 MPa and 16.79 MPa in moderate group, and 16.17 MPa, 16.49 MPa, 16.95 MPa and 17.35 MPa in severe group. Conclusion:For patients with mild lumbar degeneration requiring OLIF surgery, the intervertebral height of the surgical segment should not be overstretched. But for patients with moderate to severe lumbar degenerative disease who need to undergo OLIF surgery, it is recommended that the cage height be 0-2 mm higher than the original intervertebral space height.

The study of detection methods of cytomegalovirus infection in newborns / 中国小儿急救医学

Objective To evaluate the diagnostic value of fluorescent quantitative polymerase chain reaction(FQ-PCR) assay in human cytomegalovirus (HCMV) infection by detecting quantitatively HCMV DNA in peripheral blood mononuclear cell ( PBMC) of newborns,to evaluate the choice of detection methods for neonatal HCMV infection,and to provide a reasonable diagnosis basis for the clinic. Methods The urina-ry HCMV-DNA levels in 102 neonates with suspected HCMV infection were detected by FQ-PCR. The HCMV-DNA in PBMC was detected by FQ-PCR,and serum HCMV-IgM antibody was detected by chemilu-minescence immunoassay ( CLIA) . Then the sensitivity, specificity, coincidence rate and other indicators in the three kinds of detection methods were compared. Results Among 102 cases of suspected HCMV-infec-ted newborns,56 cases were symptomatic and 46 cases were non-symptomatic. The positive rate of HCMV-DNA in urine[87. 3％(89/102)] was significantly higher than that of PBMC HCMV-DNA [58. 8％ (60/102)] and serum HCMV-IgM antibody [40. 2％ (41/102)](all P<0. 01). For symptomatic HCMV-infec-ted newborns, PBMC HCMV-DNA quantitative detection sensitivity ( 71. 4％) was higher than serum HCMV-IgM antibody (57. 1％), and the specificity (56. 5％) was higher than urine HCMV-DNA quantifi-cation (8. 7％). The area under receiver operating characteristic(ROC) curve of PBMC HCMV-DNA quan-tification and HCMV-IgM antibody detection were 0. 642 (P=0. 014) and 0. 659 (P=0. 006),respectively;therefore PBMC HCMV-DNA and HCMV-IgM antibodies were of great importance in diagnosing symptom-atic HCMV infection in neonates. The area under the ROC curve of urinary HCMV-DNA quantification was 0. 461 ( P =0. 496 ) , and there was no significant difference between symptomatic and non-symptomatic HCMV infections in neonates. Conclusion HCMV-DNA detection in PBMC has higher sensitivity compared with HCMV-DNA detection in urine and higher specificity compared with IgM antibody detection in serum. It can be used to detect the early infection of HCMV in newborns. The rate of detection of HCMV infection can be improved by combination of the three methods.

Coronal imbalance correction with distraction of distal convex side of lumbar scoliosis in degenerative lumbar scoliosis / 中华骨科杂志

Objective@#To investigate the effect of modified transforaminal lumbar interbody fusion (TLIF) on coronal degenerative lumbar scoliosis (DLS) in adults with mild Drum Tower Hospital Classification type B and C coronal imbalance.@*Methods@#From January 2011 to December 2015, 31 patients with mild coronal imbalance underwent long-segment fusion for DLS, 27 females and 4 males, with an average age of 63.1±5.5 years (52-76 years), were retrospectively analyzed. According to the coronal balance classification of Drum Tower degenerative scoliosis, there were 20 patients with type B and 11 patients with type C. The average follow-up time was 38.5±9.3 months. Sagittal parameters includingpelvic tilt (PT), PI-LL (pelvic incidence, PI; lumbar lordosis, LL), sagittal vertical axis (SVA) and coronal parameters includingCobb angle, coronal balance distance (CBD), lumbosacral inclination angle (when L 5 is the lower fusion vertebra, the angle between L4 upper endplate and horizontal line was measured; when S1 or S2 was the lower fusion vertebra, the angle between L 5 upper endplate and horizontal line is measured), and clinical scores including Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI) (excluding sexual life assessment)were recorded before and during the last follow-up. Complications such as internal fixation displacement, fracture and loss of correction were evaluated at the last follow-up. The main method of surgical correction was the modified TLIF operation on the distal compensatory curve and concave side. After the soft tissue is released, the ipsilateral intervertebral fusion cage was implanted to distract the intervertebral space. SPSS 20.0 was used for statistical analysis. All data were expressed as mean ±standard deviation. Paired t-test was used to evaluate the imaging measurement and clinical scores. Independent sample t-test was used to compare the databetween type B and C. P value less than 0.05 has statistical significance.@*Results@#The mean operating time was 4.4±0.9 h (3.1-6.0 h) and the mean intraoperative bleeding was 777±249 ml (500-1 300 ml). For Sagittal balance, PI-LL was 21.7°±5.3° in 31 patients before operation, and the last follow-up was 7.4°±2.4° (t=16.41, P<0.001); PT was 32.6°±7.6° before operation, and the last follow-up was 24.1°±8.5° (t=15.32, P<0.001); SVA was 52.2±16.2 mm before operation, and the last follow-up was 25.5±13.8 mm (t=10.20, P<0.001). For coronal balance, the lumbosacral tilt angle was 8.8°±3.4°, and the last follow-up was 3.9°±2.1°. The average correction rate was 56.0%. The preoperative scoliosis Cobb angle was 41.5°±9.6°, and the last follow-up was 19.7°±6.7° (t=17.90, P <0.001). The average correction rate was 52.7%. The preoperative CBD was 4.3 ±0.7 mm, and last follow-up was 1.6 ± 0.8 mm (t=33.76, P < 0.001). In terms of clinical scores, the VAS score of 31 patients before operation was 6.5±1.0, and the last follow-up was 2.7±1.0 (t=15.97, P <0.001); the ODI score before operation was 34.8%+5.6%, and the last follow-up was 18.0%±5.4% (t=12.42, P <0.001). There were no significant differences in sagittal parameters, coronal parameters and clinical efficacy scores between group B and group C.@*Conclusion@#In adult DLS patients with mild coronal B-type and C-type imbalances, the application of modified TLIF interbody fusion and cage insertion in the distal convex side of lumbar scoliosis can achieve the levelization of lumbosacral region and correct coronal imbalance.

Changes of cytokines in serum and cerebrospinal fluid of newborns infected with human cytomegalovirus / 中华实用儿科临床杂志

Objective@#To investigate the molecules of cytokine in the serum and cerebrospinal fluid of newborns infected with human cytomegalovirus (HCMV) by using protein chip technology and to analyze the changes of specific cytokine in serum and cerebrospinal fluid caused by HCMV infection, in order to provide a reliable index for predicting nervous system injury caused by HCMV infection.@*Methods@#Serum and cerebrospinal fluid in 4 newborns with HCMV infection and central nervous system injury (HCMV-infected group), and 4 newborns without HCMV infection and central nervous system infection (control group) were collected in Shengjing Hospital of China Medical University from June 2016 to December 2017, and protein chip was used to screen the differentially expressed cytokines in newborns serum and cerebrospinal fluid.The samples were further expanded to collect cerebrospinal fluid from 30 newborns HCMV infection group and 30 newborns in the control group, and the expression of differentially proteins was verified by adopting enzyme linked immunosorbent assay(ELISA) method.@*Results@#The results of protein chip analysis showed that newborns in HCMV infection group, compared with the control group, had 3 differentially expressed cytokines in the cerebrospinal fluid sample: adipocyte complement-related protein of 30 kD(Acrp30), interleukin-1 alpha(IL-1α), and matrix metallo protein-3(MMP3) (all P<0.05). Newborns in the HCMV-infected group, compared with the control group, had no differential cytokine expression in the serum.The results of ELISA showed that expression of Acrp30 was significantly higher in the cerebrospinal fluid of newborns with HCMV infection and central nervous system injury [(39.76±2.01) ng/L vs.(7.75±0.10) ng/L, t=87.09, P<0.001], and MMP3 expression was higher than that of control group [(1.40±2.13) ng/L vs.(0.18±0.45) ng/L, t=3.07, P=0.003], while the expression of IL-1α was significantly lower than that of the control group [(2.36±0.99) ng/L vs.(2.91±0.78) ng/L, t=2.39, P=0.020], and the differences were statistically significant.@*Conclusions@#The changes of cytokine in cerebrospinal fluid of HCMV infected newborn children may provide a reliable index for predicting injury degree of central nervous system in HCMV, and may further assist clinicians to give timely and appropriate treatment to newborns, and further assist clinicians to improve the prognosis for newborns.

Coronal imbalance correction with distraction of distal convex side of lumbar scoliosis in degenerative lumbar scoliosis / 中华骨科杂志

Objective To investigate the effect of modified transforaminal lumbar interbody fusion (TLIF) on coronal de?generative lumbar scoliosis (DLS) in adults with mild Drum Tower Hospital Classification type B and C coronal imbalance. Meth?ods From January 2011 to December 2015, 31 patients with mild coronal imbalance underwent long?segment fusion for DLS, 27 females and 4 males, with an average age of 63.1±5.5 years (52-76 years), were retrospectively analyzed. According to the coronal balance classification of Drum Tower degenerative scoliosis, there were 20 patients with type B and 11 patients with type C. The average follow?up time was 38.5 ± 9.3 months. Sagittal parameters includingpelvic tilt (PT), PI-LL (pelvic inci?dence, PI; lumbar lordosis, LL), sagittal vertical axis (SVA) and coronal parameters includingCobb angle, coronal balance dis?tance (CBD), lumbosacral inclination angle (when L 5 is the lower fusion vertebra, the angle between L 4 upper endplate and hor?izontal line was measured; when S1 or S2 was the lower fusion vertebra, the angle between L 5 upper endplate and horizontal line is measured), and clinical scores including Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI) (excluding sexual life assessment)were recorded before and during the last follow?up. Complications such as internal fixation displace?ment, fracture and loss of correction were evaluated at the last follow?up. The main method of surgical correction was the modi?fied TLIF operation on the distal compensatory curve and concave side. After the soft tissue is released, the ipsilateral interver?tebral fusion cage was implanted to distract the intervertebral space. SPSS 20.0 was used for statistical analysis. All data were expressed as mean ±standard deviation. Paired t?test was used to evaluate the imaging measurement and clinical scores. Inde?pendent sample t?test was used to compare the databetween type B and C. P value less than 0.05 has statistical significance. Results The mean operating time was 4.4±0.9 h (3.1-6.0 h) and the mean intraoperative bleeding was 777±249 ml (500-1 300 ml). For Sagittal balance, PI-LL was 21.7°±5.3°in 31 patients before operation, and the last follow?up was 7.4°±2.4°(t=16.41, P<0.001); PT was 32.6°±7.6°before operation, and the last follow?up was 24.1°±8.5°(t=15.32, P<0.001); SVA was 52.2±16.2 mm be?fore operation, and the last follow?up was 25.5±13.8 mm (t=10.20, P<0.001). For coronal balance, the lumbosacral tilt angle was 8.8°±3.4°, and the last follow?up was 3.9°±2.1°. The average correction rate was 56.0%. The preoperative scoliosis Cobb angle was 41.5°±9.6°, and the last follow?up was 19.7°±6.7°(t=17.90, P<0.001). The average correction rate was 52.7%. The preoperative CBD was 4.3 ±0.7 mm, and last follow?up was 1.6 ± 0.8 mm (t=33.76, P<0.001). In terms of clinical scores, the VAS score of 31 patients before operation was 6.5±1.0, and the last follow?up was 2.7±1.0 (t=15.97, P<0.001); the ODI score before operation was 34.8%+5.6%, and the last follow?up was 18.0%±5.4% (t=12.42, P<0.001). There were no significant differences in sagittal param?eters, coronal parameters and clinical efficacy scores between group B and group C. Conclusion In adult DLS patients with mild coronal B?type and C?type imbalances, the application of modified TLIF interbody fusion and cage insertion in the distal con?vex side of lumbar scoliosis can achieve the levelization of lumbosacral region and correct coronal imbalance.

Changes of cytokines in serum and cerebrospinal fluid of newborns infected with human cytomegalovirus / 中华实用儿科临床杂志

Objective To investigate the molecules of cytokine in the serum and cerebrospinal fluid of newbo_rns infected with human cytomegalovirus(HCmV)by using protein chip technology and to analyze the changes of spe_cific cytokine in serum and cerebrospinal fluid caused by HCmV infection,in order to provide a reliable index for pre_dicting nervous system injury caused by HCmV infection. Methods Serum and cerebrospinal fluid in 4 newborns with HCmV infection and central nervous system injury(HCmV_infected group),and 4 newborns without HCmV infection and central nervous system infection(control group)were collected in Shengjing Hospital of China medical University from June 2016 to December 2017,and protein chip was used to screen the differentially expressed cytokines in newbo_rns serum and cerebrospinal fluid. The samples were further expanded to collect cerebrospinal fluid from 30 newborns HCmV infection group and 30 newborns in the control group,and the expression of differentially proteins was verified by adopting enzyme linked immunosorbent assay( ELISA)method. Results The results of protein chip analysis showed that newborns in HCmV infection group,compared with the control group,had 3 differentially expressed cytokines in the cerebrospinal fluid sample:adipocyte complement_related protein of 30 kD(Acrp30),interleukin_1 alpha(IL_1α), and matrix metallo protein_3(mmP3)(all P<0. 05). Newborns in the HCmV_infected group,compared with the control group,had no differential cytokine expression in the serum. The results of ELISA showed that expression of Acrp30 was significantly higher in the cerebrospinal fluid of newborns with HCmV infection and central nervous system injury[(39. 76 ± 2. 01)ng/L υs.(7. 75 ± 0. 10)ng/L,t=87. 09,P<0. 001],and mmP3 expression was higher than that of control group[(1. 40 ± 2. 13)ng/L υs.(0. 18 ± 0. 45)ng/L,t=3. 07,P=0. 003],while the expression of IL_1α was significantly lower than that of the control group[(2. 36 ± 0. 99)ng/L υs.(2. 91 ± 0. 78)ng/L,t=2. 39, P=0. 020],and the differences were statistically significant. Conclusions The changes of cytokine in cerebrospinal fluid of HCmV infected newborn children may provide a reliable index for predicting injury degree of central nervous system in HCmV,and may further assist clinicians to give timely and appropriate treatment to newborns,and further as_sist clinicians to improve the prognosis for newborns.

The progression of ossification of the posterior longitudinal ligament of the cervical spine: A follow-up study by CT imaging after laminoplasty / 中华骨科杂志

Objective To evaluate the CT imaging after laminoplasty for the patients with ossification of the posterior longitudinal ligament (OPLL) of the cervical spine.Methods From June 2011 to June 2016,Retrospectively analyzed the data of OPLL patients who underwent posterior cervical open-door laminoplasty.There were 21 patients finally enrolled in this study,which consisted of 11 male and 10 female aging from 55-69,mean(61.48±4.29).The preoperative patients all had severe symptoms of spinal compression.Collected the Japanese Orthopaedic Association Scores(JOA) Scores of all patients for gender,age,preoperative and postoperative follow-up.The length,width and thickness of OPLL were measured by CT scan and two-dimensional reconstruction of cervical spine during preoperative and follow-up,and the average progress rate was calculated.The relationship between OPLL size before surgery and OPLL progress rate after surgery was analyzed.Results A total of 21 patients were included in this study,with an average age of 61.48±4.29 years-old.The mean follow-up time was 3.36± 1.92 years.The JOA score of cervical spine was 11.81 ± 1.75 before operationand 14.43± 1.69 at the last follow-up time (t=3.8,P＜0.01).The progression rate of OPLL length,width and thickness was 3.54± 2.89 mm/year,0.49± 0.52 mm/year and 0.34± 0.21 mm/year,respectively.Compared with the width and thickness,the average progress speed of the length was statistically significant (t=3.6,P=0.003;t=3.8,P=0.002).The progression rate of the rostraland caudal of OPLL was 1.54 ±1.19 mm/year and 1.60±1.33 mm/year (t=0.1,P=0.559).Linear regression showed that OPLL length progression speed (mm) =0.05×preoperative length + 1.23,R2=0.26 and P=0.02.Theprogression rate of width and thickness of OPLL had no correlation with preoperative OPLL width and thickness.The progression rates of local,segmental,continuous,and mixed OPLL were 3.02±0.26 mm,2.97±0.65 mm,3.65± 1.14 mm,and 3.82± 1.27 mm per year.Conclusion The JOA score of the posterior open-door laminoplasty of the cervical OPLL patients was significantly improved during a short-term follow up.CT imaging follow-up showed there was progression of OPLL in length,width and thickness,and the progression rate of length was faster than width and thickness.However,there was no significant difference between the progression of rostral and caudal of OPLL.In addition,short-term follow-up showed a positive correlation between the progression rate of OPLL length and the length of OPLL preoperation.The progress rate of mixed and continuous OPLL may be greater than that of segmental and limited OPLL.

Evaluation on efficacy of Huaiqihuang granules in treatment of children with asthma at non-acute attack stage / 吉林大学学报(医学版)

Objective: To explore the efficacy of Huaiqihuang Granules in the treatment of the children with asthma at non-acute attack stage and its effect on the immune function indexes of body. Methods: A total of 180 children with asthma at non-acute attack stage were divided into Huaiqihuang Granules treatment group (n=92, treated with traditional Chinese medicine Huaiqihuang Granules along with oral montelukast and inhaled corticosteroid, ICS+MK+H group) and routine treatment group (n=88, only given oral montelukast and inhaled corticosteroid, ICS+MK group). The indexes of asthma attack degrees, traditional Chinese medicine (TCM) syndrome indexes, blood immune function indexes and pulmonary function indexes of the children in two groups were detected. Results: There was no difference in the disease degrees of the children between two groups before treatment (P>0. 05). Compared with routine treatment group, the score of acute attack of asthma of the children in Huaihuang Granules treatment group was decreased after treatment (P0. 05). Compared with routine treatment group, the peak expiratory flow (PEF) and the ratio value of forced expiratory volume in the first second /forced vital capacity (FEV1/FVC) of the children in Huaiqihuang Granules treatment group were increased (P0. 05). Conclusion: On the basis of routine treatment, Huaiqihuang Granules can reduce the condition of children with asthma at non-acute attack stage and improve the TCM syndrome and immune function.

Screening and identification of proteins interacting with HCMV UL132 protein / 吉林大学学报(医学版)

Objective:To screen the proteins interacting with the human cytomegalovirus(HCMV)UL132 protein from the human fetus brain cDNA library by using Yeast Two-Hybrid System, and to elucidate the possible mechanism of UL132 protein in congenital cytomegalovirus infection.Methods:The HCMV UL132 fragment was amplified by polymerase chain reaction,the amplified HCMV UL132 fragment and expression vector pGBKT7 were digested and purified,and the HCMV UL132 fragment was linked to the vector pGBKT7.The pGBKT7-UL132 was constructed and transformed to yeast AH109, then the Human Fetal Brain DNA Library DNA was transformed into AH109 yeast.Using HCMV UL132 as abait, a human fetus brain cDNA was screened and the proteins interacting with UL132 protein were searched, the positive clone was sequenced and analyzed by bioinformatics methods.Results:The bait expression vector pGBKT7-UL132 was successfully constructed.The results of double enzyme digestion showed that there were two visible bands of 800 and 7 000 bp, respectively.After transformation of library plasmid, the transformation efficiency was calculated, and the transformation efficiency was 6.6×103 cfu· μg-1.There were 95 blue clones by X-gal coloration reactionsequencing and there were 10 clones interacting with the protein encoded by UL141 protein.The BLAST analysis showed that 7 of them were highly homologous with CAML.Conclusion:CAML might be one interaction protein with HCMV UL132 in Human Fetus Brain cDNA Library,suggesting that the interaction may be associated with the invasion and proliferation of the HCMV.

Screening and Analysis of Proteins Interacting with HCMV UL145 from a Human Fetal Brain cDNA Library / 中国医科大学学报

Objective To screen a human fetal brain cDNA library for proteins that can interact with HCMV UL145 using a yeast two-hybrid system.Methods A bait plasmid (pGBKT7-UL145) was constructed.Using HCMV UL145 as bait,a human fetal brain cDNA library was screened and proteins interacting with UL145 were identified using bioinformatic methods to sequence and analyze the positive clones.Results Three clones interacting with HCMV UL145 were found,and identified as FOXG1.Conclusion Several proteins interacting with HCMV UL145 in the human fetal brain cDNA library were identified as FOXG1,indicating that this protein may play an important role in the course of HCMV infection.

The mechanism research of STIM1 in breast cancer cells / 实用医学杂志

Objectives To explore the calcium signaling mechanism of STIM1 in breast cancer cells. Meth-ods After SiRNA interruption, Western blot and Transwell were used to measure protein expression of STIM1 and cell migration in MDA-MB-231 cells respectively. The relationship between STIM1 and SOCE calcium signaling were analysed by Laser confocal microscopy. Western blots were used to measure protein expression of FAK after si-lence STIM1. Results The numbers of cells without STIM1 were significantly lower than those cells with STIM1 by Transwell assay. STIM1 mediated SOCE in MDA-MB-231. Blocking SOCE might inhibite cells migration. Si-lence STIM1 did not affect the expression or activation of FAK in MDA-MB-231 cells. Conclusion STIM1 influ-ences cell migration through SOCE pathway in breast cancer cells, which is independent on the expression or activa-tion of FAK.

Value of serum amyloid A in patients with acute asthma attack / 实用医学杂志

Objective To assess the value of serum amyloid A (SAA) in patients with acute asthma attack. Methods Sixty-four asthmatic patients in acute phase and 20 healthy individuals were included. The asthmatic patients were divided into bacterial infection-induced group and non-bacterial infection-induced group. Lung function test and chest X-rays test were conducted And inflammatory cell counts , serum SAA and CRP levels were measured. SAA were compared among subgroups of asthmatic patients and healthy controls and the diagnostic value of SAA to distinguish bacterial infection-induced asthma was estimated. Results SAA of both asthma subgroups were significantly higher when compared with the healthy individuals, and it was higher in bacterial infection-induced group than that in non-bacterial infection-induced group. In terms of ROC curve , AUC was 0.966 for SAA to distinguish merging bacterium infection, and the cut-off value was 36.67mg/L with sensitivity of 92.3% and specificity of 88.2%. Conclusions SAA increases in patients during acute asthma attack, and particularlymore obviously in bacterial infection-induced patients. It may be used as a reliable biomarker to distinguish merging bacterium infection during acute asthma attack.

Value of five-repetition sit-to-stand test in clinical evaluation of chronic obstructive pulmonary disease / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the value of five-repetition sit-to-stand test (5STS) in clinical evaluation of elderly patients with chronic obstructive pulmonary disease (COPD).</p><p><b>METHODS</b>Fifty-one patients with COPD and 20 healthy individuals were enrolled in this study. All the participants underwent 5STS, pulmonary function examination, and 6 min walking test (6MWT) and were evaluated for severity of dyspnea (by mMRC) and BODE index during the tests.</p><p><b>RESULTS</b>All the participants completed 5STS test with a good reproducibility of the time used for 3 sessions of the test (P<0.001). The mean time used by COPD patients for 5STS was significantly longer than that by healthy individuals (12.93±3.11s vs 0.72±0.71 s, P=0.002). The results of 5STS showed a significant negative correlation with those of 6MWT in the case group and control group with correlation coefficients of -0.611 and -0.682, respectively. The results of 5STS were negatively correlated with FEV1%Pre and body mass index (P<0.05) but positively with mMRC and BODE index in COPD patients (P<0.05).</p><p><b>CONCLUSION</b>5STS is a simple and reproducible test to evaluate the patients' exercise capacity and the severity of COPD, and is well correlated with the current methods for clinical evaluation of COPD.</p>

1,25-dihydroxyvitamin D3 pretreatment inhibits house dust mite-induced thymic stromal lymphopoietin release by human airway epithelial cells / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of 1,25-dihydroxyvitamin D3 (1,25VD3) on house dust mites (HDM)-induced expression of thymic stromal lymphopoietin (TSLP) in human airway epithelial cells in vitro.</p><p><b>METHODS</b>Human airway epithelial 16HBE cells were incubated with 200, 400, and 800 U/L in the absence or presence of 1,25VD3 (10(-8) mol/L) for 6 h and 24 h, and TSLP mRNA and protein expressions in the cells were assessed using quantitative PCR and ELISA.</p><p><b>RESULTS</b>16HBE cells incubated with HDM at 200, 400, and 800 U/L showed significantly increased TSLP mRNA and protein expressions (P<0.05). Pretreatment of the cells with 1,25VD3 obviously lowered 400 U/L HDM-induced TSLP expressions (P<0.05), but 1,25VD3 added along with HDM in the cells did not produce significant effects on TSLP expressions (P=0.58).</p><p><b>CONCLUSION</b>Both 1,25VD3 and HDM can induce TSLP expression and release in 16HBE cells, but pretreatment with 1,25VD3 can decrease HDM-augmented TSLP expression in the cells.</p>

Effect of thymic stromal lymphopoietin on human bronchial epithelial permeability / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of thymic stromal lymphopoietin (TSLP) on the permeablily of monolayer bronchial epithelial cells in vitro.</p><p><b>METHODS</b>Cultured human bronchial epithelial cell line 16HBE was exposed to 0.1 or 1 ng/ml TSLP for 0, 0.5, 6, 12, or 24 h, and the epithelial monolayer permeability was assessed by measuring transepithelial electrical resistance (TER), permeability to FITC-labeled dextran (FITC-DX) and expression of E-cadherin.</p><p><b>RESULTS</b>Compared with the control cells group, 16HBE cell monolayer showed significantly increased TER (P<0.001) and decreased FITC-DX fluorescence in the lower chamber (P<0.05) following exposure to 0.1 and 1 ng/ml TSLP, but these changes were not dose-dependent. Exposure to 0.1 ng/ml TSLP resulted in significantly increased expression of E-cadherin. The 16HBE monolayer exposed to 0.1 ng/ml TSLP for 24 h showed the most obvious increase of TER and E-cadherin expression (P<0.05); FITC-DX fluorescence level was markedly decreased after TSLP exposure for 12 h and 24 h (P<0.05), and the effect was more obvious in 12 h group.</p><p><b>CONCLUSION</b>TSLP can protect the barrier function of normal bronchial epithelial cells in vitro.</p>

4-(Methylnitrosamino)-1-(3-pyridyl) -1-butanone induces circulating microRNA deregulation in early lung carcinogenesis / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To study the alteration of circulating microRNAs in 4-(methylnitrosamino)-1-(3-pyridyl) -1-butanone (NNK)-induced early stage lung carcinogenesis.</p><p><b>METHODS</b>A lung cancer model of male F344 rats was induced with systemic NNK and levels of 8 lung cancer-associated miRNAs in whole blood and serum of rats were measured by quantitative RT-PCR of each at weeks 1, 5, 10, and 20 following NNK treatment.</p><p><b>RESULTS</b>No lung cancer was detected in control group and NNK treatment group at week 20 following NNK treatment. The levels of some circulating miRNAs were significantly higher in NNK treatment group than in control group. The miR-210 was down-regulated and the miR-206 was up-regulated in NNK treatment group. The expression level of circulating miRNAs changed from week 1 to week 20 following NNK treatment.</p><p><b>CONCLUSION</b>The expression level of circulating miRNAs is related to NNK-induced early stage lung carcinogenesis in rats and can therefore serve as its potential indicator.</p>

Sodium butyrate induces apoptosis of human colon cancer cells by modulating ERK and sphingosine kinase 2 / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To investigate the role of extracellular signal-regulated kinase (ERK) in apoptosis of human colon cancer (HCT116) cells.</p><p><b>METHODS</b>After the HCT116 cells were pretreated with specific ERK inhibitor (U0126) or specific siRNA and exposed to 10 mmol/L sodium butyrate (NaBT) for 24 h, their apoptosis was detected by flow cytometry, levels of SphK2 and ERK protein were measured by Western blot, and translocation of SphK2 was assayed by immunofluorescence microscopy.</p><p><b>RESULTS</b>The U0126 and siRNAs specific for SphK2 blocked the export of SphK2 from nuclei to cytoplasm and increased the apoptosis of HCT116 cells following NaBT exposure. Over-expression of PKD decreased NaBT-induced apoptosis of HCT116 cells, which was reversed by U0126. Furthermore, transfection of HCT116 cells with constitutively activated PKD plasmids recovered the U0126-blocked export of SphK2.</p><p><b>CONCLUSION</b>ERK regulates the export of SphK2 and apoptosis of HCT116 cells by modulating PKD. Modulation of these molecules may help increase the sensitivity of colon cancer cells to the physiologic anti-colon cancer agent, NaBT.</p>

Role of calcium dyshomeostasis in 1-methyl-4-phenylpyridinium ion-induced apoptosis of human neuroblastoma SH-SY5Y cells / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the role of calcium dyshomeostasis in 1-methyl-4-phenylpyridinium ion (MPP⁺)-induced apoptosis of human neuroblastoma SH-SY5Y cells.</p><p><b>METHODS</b>The viability of SH-SY5Y cells exposed to varying concentrations of MPP⁺ was assessed using MTT colorimetric assay, and MPP⁺-induced cell apoptosis was detected with hoechst 33342 staining and Annexin V+PI assay. Western blotting and rhodamine 123 staining were employed to examine the changes in cellular poly(ADP-ribose) polymerase (PARP) protein expression and mitochondrial membrane potential in response to MPP⁺ exposure. The effects of ruthenium red and/or MPP⁺ on calcium concentration in the cytoplasm, mitochondria and endoplasmic reticulum were evaluated using confocal microscopy.</p><p><b>RESULTS</b>MPP⁺ induced apoptosis and caused reduced cell viability and mitochondrial membrane potential in SH-SY5Y cells. The cells exposed to MPP⁺ showed a lowered calcium concentration in the cytoplasm and endoplasmic reticulum and an increased mitochondrial Ca²⁺ uptake. Ruthenium red rescued MPP⁺-induced apoptosis and mitochondrial membrane potential reduction, reduced PARP cleavage, and inhibited the increase of mitochondrial matrix free Ca²⁺ in the cells exposed to MPP⁺.</p><p><b>CONCLUSION</b>Mitochondrial calcium overload plays an important role in MPP⁺-induced apoptosis of SH-SY5Y cells, which is closely associated with dysregulation of intracellular Ca²⁺ homeostasis.</p>