Objective The objective of this study was to investigate the effects of maytansine on proliferation,migration,in-vasion,apoptosis and autophagy of human thyroid cancer C643 cells.Methods C643 cells were treated with different concentrations(0.049,0.195,0.781,3.125,12.5,50 and 200 μmol/L)of maytansine,the effect of maytansine on the proliferation of C643 cells was detected by the sulforhodamine B(SRB)method,and the concentration of subsequent experiments was determined.C643 cells in the logarithmic growth stage period were divided into the control group,low-dose group,mid-dose group and high-dose group.The effects of maytansine on migration and invasion abilities of C643 cells were detected by cell scratch and Transwell chamber assay;The levels of reactive oxygen species(ROS)were detected by 2′,7′-dichlorofluorescein diacetate(DCFH-DA)fluorescent probe experi-ment;The apoptosis rate of C643 cells was detected by flow cytometry;The expression of proteins related to apoptosis or autophagy was detected by Western blot.Results Maytansine at concentrations of 0.049,0.195,0.781,3.125,12.5,50 and 200 μmol/L could in-hibit the proliferation of C643 cells(P<0.05),and exhibited a significant concentration time dependence.The half maximal inhibitory concentrations(IC50)at 24,48 and 72 h were 54.255,5.193 and 0.647 μmol/L,respectively;The cell scratch and Transwell chamber results showed that maytansine at concentrations of 0.1,1 and 10 μmol/L could reduce the migration and invasion abilities of C643 cells(P<0.05 and P<0.01).The fluorescence probe results showed that maytansine at concentrations of 0.1,1 and 10μmol/L could increase the intracellular ROS levels of C643 cells(P<0.01).The flow cytometry results showed that maytansine at concentrations of 0.1,1 and 10 μmol/L could concentration dependently increase the apoptosis rate of C643 cells(P<0.01).The Western blot results showed that with the increase of maytansine concentrations,the expression of Bax protein related to apoptosis in C643 cells increased(P<0.05),the expression of Bcl-2 decreased(P<0.05),the expression of LC3Ⅱ/Ⅰ(P<0.05)and Beclin-1(P<0.01)increased,while the expression of p62 decreased(P<0.001).Conclusion Maytansine can inhibit the proliferation,migration and invasion of human thyroid cancer C643 cells,and induce the synergistic effect on apoptosis and autophagy by increasing intracellular ROS levels.

Objective The objective of this study was to investigate the effects of maytansine on proliferation,migration,in-vasion,apoptosis and autophagy of human thyroid cancer C643 cells.Methods C643 cells were treated with different concentrations(0.049,0.195,0.781,3.125,12.5,50 and 200 μmol/L)of maytansine,the effect of maytansine on the proliferation of C643 cells was detected by the sulforhodamine B(SRB)method,and the concentration of subsequent experiments was determined.C643 cells in the logarithmic growth stage period were divided into the control group,low-dose group,mid-dose group and high-dose group.The effects of maytansine on migration and invasion abilities of C643 cells were detected by cell scratch and Transwell chamber assay;The levels of reactive oxygen species(ROS)were detected by 2′,7′-dichlorofluorescein diacetate(DCFH-DA)fluorescent probe experi-ment;The apoptosis rate of C643 cells was detected by flow cytometry;The expression of proteins related to apoptosis or autophagy was detected by Western blot.Results Maytansine at concentrations of 0.049,0.195,0.781,3.125,12.5,50 and 200 μmol/L could in-hibit the proliferation of C643 cells(P<0.05),and exhibited a significant concentration time dependence.The half maximal inhibitory concentrations(IC50)at 24,48 and 72 h were 54.255,5.193 and 0.647 μmol/L,respectively;The cell scratch and Transwell chamber results showed that maytansine at concentrations of 0.1,1 and 10 μmol/L could reduce the migration and invasion abilities of C643 cells(P<0.05 and P<0.01).The fluorescence probe results showed that maytansine at concentrations of 0.1,1 and 10μmol/L could increase the intracellular ROS levels of C643 cells(P<0.01).The flow cytometry results showed that maytansine at concentrations of 0.1,1 and 10 μmol/L could concentration dependently increase the apoptosis rate of C643 cells(P<0.01).The Western blot results showed that with the increase of maytansine concentrations,the expression of Bax protein related to apoptosis in C643 cells increased(P<0.05),the expression of Bcl-2 decreased(P<0.05),the expression of LC3Ⅱ/Ⅰ(P<0.05)and Beclin-1(P<0.01)increased,while the expression of p62 decreased(P<0.001).Conclusion Maytansine can inhibit the proliferation,migration and invasion of human thyroid cancer C643 cells,and induce the synergistic effect on apoptosis and autophagy by increasing intracellular ROS levels.

Objective To kxplork thk valuk of dktkcting brain mktabolitks of prktkrm infants at full tkrm for prkdicting thk nkurodkvklopmkntal lkvkl,and to providk thk basis for karle clinical intkrvkntion. Methods Thirte casks of prktkrm infants wkrk collkctkd from thk Nkonatal Intknsivk Cark Rnit and Nkuro - Akhabilitation Dkpartmknt of Guangzhou Zomkn and Childrkn＇s Mkdical Ckntkr bktwkkn Mae 2015 and March 2016,thkn thke wkrk chkcckd be adopting brain magnktic rksonanck imaging and magnktic rksonanck spkctroscope at corrkctkd full tkrm,and assksskd be using Llbkrta Infant Motor Scalk(LIMS)and Gkskll dkvklopmkntal scalk kvaluation at corrkctkd agk of 6 months and corrkctkd of agk 1 ekar old. ResuIts In thk 30 casks of prktkrm infants,19 casks wkrk malk,11 casks wkrk fkmalk,and thk gkstational agk was 27+3 -31 wkkcs,and avkragk gkstational agk was(28. 8 ± 1. 0)wkkcs,and thk birth wkight was 800-1 400 g[(1 176. 3 ± 145. 1)g]. Thk stude found that meo-inositol( MI),MI╱crkatink( Cr)in basal ganglia wkrk nkgativkle corrklatkd with thk dkvklopmknt quotiknt at corrkctkd agk of 1 ekar old(r﹦ -0. 465,-0. 532;all P＜0. 05). Factic acid(Fac)╱Cr in hippocampus was nkgativkle corrklatkd with dkvklopmkntal quotiknt at corrkctkd agk of 6 months(r﹦ -0. 420,P＜0. 05);Fac,Fac╱Cr in pkrivkntricular wkrk nkgativkle corrklatkd with dkvklopmkntal quo-tiknt at corrkctkd agk of 1 ekar old(r ﹦ -0. 405,-0. 386;all P ＜0. 05). Fac╱Cr in pkrivkntricular was nkgativkle corrklatkd with LIMS scorks at corrkctkd agk 1 ekar old(r﹦ -0. 380,P＜0. 05);Fac,Fac╱Cr in ckrkbkllum wkrk nkga-tivkle corrklatkd with dkvklopmknt quotiknt at corrkctkd agk of 1 ekar old(r﹦ -0. 393,-0. 394;all P＜0. 05). Thkrk was no corrklation bktwkkn frontal lobk mktabolitks and nkurodkvklopmkntal lkvkl(P＞0. 05). ConcIusions Prktkrm infants brain mktabolitks at full tkrm contributk to prkdicting nkurodkvklopmkntal lkvkl. MI,Fac,MI╱Cr,Fac╱Cr ark of valuks for prkdicting nkurodkvklopmkntal lkvkl,and MI╱Cr is thk bkst prkdictor. Lmong frontal lobk,basal ganglia, hippocampus,pkrivkntricular and ckrkbkllum,thk pkrivkntricular is thk bkst arka for prkdicting nkurodkvklopmkntal lkvkl. Corrkctkd agk of 1 ekar old maebk thk bkst timk to prkdicting nkurodkvklopmkntal lkvkl.

Objective To investigate the clinical prognoses of acute vertebral basilar artery occlusion by endovascular treatment and the risk factors for poor prognosis. Methods Clinical data of 43 patients with acute vertebral basilar artery occlusion who underwent endovascular treatment in our hospital from August 2016 to December 2017 were retrospectively analyzed. The immediate revascularization rate and clinical outcomes three months after surgery were analyzed; and according to the clinical prognoses, these patients were divided into a good prognosis group and a poor prognosis group. Receiver operating characteristic (ROC) curve was used to compare the NIHSS scores, times from onset to vessel recanalization, improved post-circulation CT scale of Alberta stroke project based on diffusion weighted imaging (DWI-PC-ASPECTS) scores, and MR angiography-basilar artery on computed tomography angiography prognostic scalere for basilar artery occlusion (MRA-BATMAN) scores to predict the prognoses. Univariate Logistic regression analysis and multivariate Logistic regression analysis were used to evaluate the relations of times from onset to vessel recanalization, NIHSS scores, DWI-PC-ASPECTS scores, and MRA-BATMAN scores with poor prognosis. Results Forty-three patients (100％) achieved thrombolysis in cerebral infarction (TICI) grading 3/2b immediately after surgery. The mRS scores were 0-2 in 26 patients (60.5％, good prognosis group), and those were 3-6 in 17 patients (39.5％, poor prognosis group) three months after surgery. When the NIHSS scores was 21, times from onset to vessel recanalization was 600 min, DWI-PC-ASPECTS predictive threshold was 8.5 and MRA-BATMAN predictive threshold was 6.5, the diagnostic accuracy of predicting poor prognosis was the highest (sensitivity=0.941, 0.706, 0.808, and 0.577, and specificity=0.846, 0.423, 0.647, and 0.824). Univariate Logistic regression analysis showed that preoperative NIHSS scores≥21, improved DWI-PC-ASPECTS scores≤8.5, and MRA-BATMAN scores≤6.5 were risk factors for poor prognosis (P<0.05). Multivariate Logistic regression analysis showed that preoperative NIHSS scores≥21 was an independent risk factor for poor prognosis (OR=15.679, 95％CI:1.608-152.879, P=0.000). Conclusion Intravascular treatment of acute vertebral basilar artery occlusion is safe and effective, and the patients with preoperative NIHSS scores≥ 21 are highly likely to have poor prognosis.

Objective:To investigate the clinical effect of bridging fixation with locking plate for the Seinsheimer type V subtrochanteric femoral fracture. Methods:From March 2009 to September 2014,18 cases of Seinsheimer type V sub-trochanteric femoral fracture were treated by open reduction and bridging fixation with locking plate through proximal and distal approach including 16 males and 2 females with an average age of 41 years old ranging from 22 to 67 years old. Among them , 12 cases caused by traffic accident,5 cases by falling,1 case by heavy aboving. All cases were fresh and closed fractures. Time between injury and operation was from 4 to 9 days with an average of 6.2 days. Of them ,11 cases were fixed with reverse LISS and the other 7 cases were fixed with anatomical locking plates of proximal femur. Results:The mean time of operation was 110 min (ranged from 90 to 155 min). The mean blood loss during operation was 425 ml (ranged from 350 to 650 ml) and 16 cases got blood transfusion which was meanly 300 ml. The mean hospital time was 14 days (ranged from 12 to 18 days). The mean duration of followed up was 11.8 months (ranged from 8 to 22 months). The mean time of bone union was 6.6 months (ranged from 5 to 8 months). There was not any complication such as infection,implant failure,hip varus,external rotation deformity of low limb or fat embolism. The Sanders hip scores were 53.22±6.48,the result was excellent in 12 cases and good in 6 cases at the last follow up. Conclusion:Under the principle of biological osteosynthesis ,treatment of Seinsheimer type V sub-trochanteric femoral fracture with bridging locking plate fixation has such advantages as high mechanism ,less interference of blood supply,stable fixation and little complication. It is a safe and idea way for the treatment of the Seinsheimer type V sub-trochanteric femoral fracture.

Objective To study the curative effect and safety of senile osteoporotic vertebral compression fractures with balloon ky-phoplasty. Methods The clinical data of 80 patients in our hospital during July 2008 to July 2012 with senile osteoporotic vertebral compres-sion fractures were analysed retrospectively. And the clinical effect was evaluated by observing the charges of visual analog scale (VAS), height of vertebral bodies and Cobb’ s angle, the quality of life score in patients respectively before and after operation. Results The pain of the patients were controlled effectively after operation, and the patients had significant and sustained improvement in anterior and midline ver-tebral body height after operation, with (56. 02 ± 12. 08) % and (58. 19 ± 13. 11) % before preoperation respectively, and (72. 10 ± 16. 19) % and (78. 33 ± 19. 02) % after surgery respectively. VAS score reduced from (8. 31 ± 1. 22) to (1. 65 ± 0. 33) after surgery;Cobb’s angle reduced from (24. 12 ± 3. 28)° to (13. 56 ± 2. 05)° after operation. The differences of the frontal height and flange height, VAS scores, and Cobb’s angle before and after operation were statistically significant (P<0. 05). The incidence of complications reduced from 23. 75% to 1. 25% after operation, which indicates significant difference (P<0. 01). According to QLQC-30 quality of life score, the postoperative life of patients were much better than that of the preoperative life, and the difference of all statistical index were of statistical significance (P<0. 05). Conclusion Balloon kyphoplasty in the treatment of senile osteoporotic vertebral compression fractures has signifi-cant effect and high safety, it should be popularized and applied in clinical.

Objective To investigate effects of Danhong on the serum levels of CD137, high-sensitivity C-reactive protein (hs-CRP) and homocysteine (Hcy) in patients with non-ST elevation acute myocardial infarction complicating metabolic syndrome. Methods A total of 126 patients with non-ST elevation acute myocardial infarction complicating metabolic syndrome were enrolled and randomly divided into a conventional treatment group and a Danhong treatment group using a random-digit table, with 63 patients in each group. All patients underwent angiography or percutaneous coronary intervention. The patients in the Danhong treatment group treated with intravenous Danhong 20 ml on the basis of conventional treatment for 1 week. The serum levels of CD137, hs-CRP and Hcy were measured at hospital admission and 10 days after treatment. The severity of coronary artery disease was assessed by the Gensini-score. Results The levels of CD137, hs-CRP and Hcy in both groups after treatment were significantly lower than before treatment (conventional treatment group: t 12.393, 17.408 and 9.458; Danhong treatment group: t 16.110, 17.573 and 13.481; all P<0.01), and the Danhong treatment group were significantly decreased than the conventional treatment group (t 2.815, 3.224 and 3.157, all P<0.01). The serum levels of CD137 and hs-CRP before treatment were significantly correlated with Gensini scores in 126 patients (r 0.720 and 0.562,all P<0.01). Conclusions The serum levels of CD137 and hs-CRP are significantly correlated with the severity of coronary artery disease, intravenous Danhong may has protective effect for coronary artery disease via decreasing CD137 and hs-CRP.

BACKGROUND:The basic idea of artificial disc replacement is the intension to minimize the impact on adjacent segments based on the premise of stabilizing index segment, then prevent and reduce the incidence of adjacent segment degeneration.
OBJECTIVE:To explore the indications and contraindications of artificial disc replacement, peri-operative
economics considerations, long-term complications, as wel as the effect of artificial lumbar disc replacement combined with fusion surgery.
METHODS:The PubMed database, CNKI database and SinoMed database over the past decade were searched for the related articles. The retrospective and prospective clinical trials of artificial lumbar disc replacement were included. Repetitive studies and stale perspectives were excluded. A total of 34 articles were summarized and analyzed in the end.
RESULTS AND CONCLUSION:Since the first artificial lumbar disc prosthesis designed to be commercial y
distributed in 1982, there have been a plenty of clinical trials on lumbar disc replacement. However, there is no
answer to many problems that encountered in clinical trials. The effect of the number of replaced segment on the clinical outcomes, the effect of facet joint degeneration on the clinical outcomes, selection of the patients with the history of lumbar disc surgery, age of the patients and the rest time before disc replacement should be taken into consideration in the researches on indications and contraindications of artificial disc replacement. The
intraoperative blood loss, operation time and hospital stay after replacement can be used to evaluate whether lumbar disc replacement is better than the traditional lumbar fusion surgery or not. The complications after lumbar disc
replacement include heterotopic ossification, implants mechanical failure, and facet joint and adjacent segment
degeneration. The combination of lumbar disc replacement and fusion surgery for the treatment of multi-segmental lumbar disc diseases can achieve complement and thus obtaining the efficacy that better than the application of one surgery alone.

BACKGROUND:Artificial Lumbar disc replacement as a new choice for the treatment of degenerative disc disease has aroused widespread concern by clinicians because of the preservation of lumbar vertebra’s biomechanical characteristics during pain eliminating. While the design of the prosthesis structure and material needs further study and validation.
OBJECTIVE:To review the structure and material types of several newly designed artificial lumbar discs, then to discuss the trends in the optimization design of prosthesis, in order to provide instruction for the design and assessment of new lumbar artificial disc prosthesis.
METHODS:The PubMed database, CNKI database and SinoMed database were searched for related articles. New articles related to artificial lumbar disc structure, material, in vivo and in vitro biomechanics were included. Repetitive studies and stale perspectives were excluded. A total of 46 articles were summarized and discussed in the end.
RESULTS AND CONCLUSION:Artificial lumbar disc has developed for nearly 30 years, the design of structure and biological material has been in continuous improvement. At first, we summarized the principle and current situation in the design of movement reservation, movement constraint, instant fixation, base material, weight-bearing material and coating material of artificial lumbar disc prosthesis, then combined with the exist newly in vivo and in vitro biomechanical results to evaluate different kinds of design with the recent research trend to prospect the development of biomimetic design, material improvement, the optimization design of prosthesis and assisted devices.

Objective To analyze expression of Bmi-1 gene in thyroid tissues and the relationship between Bmi-1 gene and metastasis of papillary thyroid carcinoma.Methods RT-PCR was used to detect expression of Bmi-1 in normal thyrroid tissues(8 eases),nodular goiters(18 cases)and papillary thyroid carcinomas (24 cases).The result was analyzed by Fisher exact propability test.Results Bmi-1 expression was detected only in 1 case(12.5%)in normal thyroid tissues group,3 cases(16.7%)in nodular goiters group,and 19 cases(79.2%)in papillary thyroid carcinoma group.The difference of Bmi-1 expression between the 3 groups had statistical significance(P<0.05).There were 16 cases of lymph node metastasis(66.67%)in the 24 cases of papillary thyroid carcinoma.The difference of Bmi-1 expression between cases with cervical lymph node metastasis and those without metastasis had statistical significance(P<0.05).Among the 19 thyroid carcinoma cases in which Bmi-1 expression was positive,12 eases(63.2%)were over45 years old,and 7 cases(36.8%)were under 45 years.The difference had statistical significance(P<0.05).Conclusions Expression of Bmi-1 gene in papillary thyroid carcinoma tissue is significantly higher than that in nodular goiters and normal thyroid tissues.Bmi-1 expression is closely relevant to lymph node metastasis and age,implying that Bmi-1 expression has clinical significance of distinguishing thyroid malignant tumors from benign diseases and it may provide clues to unravel the mechanism and prognosis of papillary thyroid carcinoma metastasis.