MicroRNA-16 inhibits cell proliferation and migration by targeting heat shock protein 70 in heat-denatured dermal fibroblasts

BACKGROUND/AIMS@#This study aimed to investigate the precise mechanism and function of miR-16 in heat-denatured primary human dermal fibroblasts.@*METHODS@#Primary human dermal fibroblasts were separated from normal human skin samples. Under heat stress, the levels of miR-16 and heat shock protein 70 (HSP70) were detected in primary human dermal fibroblasts by quantitative real-time polymerase chain reaction (qRT-PCR). Next, heat-denatured cells were transfected with synthetic scrambled negative control (NC) RNA (NC group), miR-16 mimics, miR-16 inhibitor or miR-16 inhibitor accompanied by small interfering RNA targeting HSP70, then the mRNA level of HSP70 was detected by qRT-PCR, cell proliferation was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and AlamarBlue assay, cell migration was examined by Transwell assay and cell apoptosis was assessed by transferase dUTP (deoxyuridine triphosphate) nick end labeling (TUNEL) assay. In addition, cell apoptosis-related proteins, Bax and Bcl-2, were detected by Western blotting.@*RESULTS@#Heat stress significantly reduced miR-16 level and increased the mRNA level of HSP70 compared with untreated cells (p < 0.05). Overexpressed miR-16 reduced the mRNA level of HSP70, suppressed cell proliferation (p < 0.05 or p < 0.01), migration (p < 0.05), and promoted cell apoptosis (p < 0.001) compared with the NC group. Down-regulated miR-16 exerted an opposite effect on primary human dermal fibroblasts with heat-denaturation. Furthermore, effects of miR16 down-regulation on cell proliferation and migration were reversed by HSP70 silence.@*CONCLUSIONS@#MiR-16 might have an inhibitory effect on cell proliferation and migration in heat-denatured human dermal fibroblasts, and HSP70 might be associated with the cell proliferation and migration as a target gene of miR-16.

Meta-analysis of posterior laminectomy and instrumented fusion versus laminoplasty in treatment of multilevel cervical spondylotic myelopathy / 中国组织工程研究

BACKGROUND:Many studies concern the comparison of posterior laminectomy and instrumented fusion and posterior laminoplasty for multilevel cervical spondylotic myelopathy, but the sample size of many studies has limitations. There is lack of objective evaluation on advantages and disadvantages of two surgical methods. OBJECTIVE:To compare the efficacy and safety of posterior laminectomy and instrumented fusion and laminoplasty in the treatment of multilevel cervical spondylotic myelopathy. METHODS:A systematic search of al the studies published was conducted on the PubMed, Cochrane Central, EMbase, the ISI Web of Knowledge Database, CMB, CNKI, VIP and Wanfang databases. Randomized and non-randomized control ed trials that compared between posterior laminectomy and instrumented fusion and laminoplasty for multilevel cervical spondylotic myelopathy were identified. Meta-analyses were performed in postoperative Japanese Orthopaedic Association scores, cervical range of motion, cervical curvature index, incidence of C5 nerve root paralysis and incidence of axial symptoms. RESULTS AND CONCLUSION:(1) Fourteen studies involving 1 024 patients were included. Among the patients, 519 underwent laminectomy and instrumented fusion and 505 underwent laminoplasty. (2) The results of the meta-analysis indicated that, compared with laminectomy and instrumented fusion group, laminoplasty group had advantages of a lower incidence of C5 palsy [RR=2.24, 95%CI(1.33,3.75), Z=3.05, P<0.05] and smal degree of cervical rotation injury [SMD=-0.71, 95%CI(-2.21,-1.2), Z=6.63, P<0.05]. However, the two groups had no statistical difference in postoperative Japanese Orthopaedic Association score, cervical curvature index and the incidence of axial symptoms. (3) These results suggested that both laminectomy and instrumented fusion and laminoplasty were demonstrated to be effective for multilevel cervical spondylotic myelopathy. Laminoplasty had obvious advantages of decreasing the degree of cervical rotation injury and lowering incidence of C5 palsy. However, in the process of clinical diagnosis and treatment, the patient’s condition should be combined. The long-term clinical efficacy of the technology needs more clinical work to confirm.

Effects of safflower yellow pigment on plasma D-D and β-HCG levels in patients with conservative treatment of ectopic pregnancy / 中国生化药物杂志

Objective To investigate the effect of safflower yellow pigment on plasma D-dimer (D-D) and β-human chorionic gonadotropin (β-HCG) in ectopic pregnancy patients.Methods 96 patients with conservative treatment of ectopic pregnancy from April 2014 to April 2016 in our hospital were divided into control group and experimental group according to the method of drawing lots.The control group was treated with routine therapy, the experimental group was treated with safflower yellow pigment based on the control group.Pelvic mass disappearance time, D-D, β-HCG, vascular endothelial growth factor, carbohydrate antigen 125 and safety of the two groups were compared.Results The total effective rate of the experimental group(97.91%) was higher than that of the control group(83.33%),the difference was statistically significant (P<0.05) .The time of disappearance of pelvic mass in the experimental group was shorter than that in the control group (P<0.05); the levels of VEGF and CA125 in the experimental group were lower than those in the control group ( P<0.05 ) .There was no difference in safety between the two groups. Conclusion Conventional therapy plus safflower yellow pigment can promote the absorption of pelvic mass and reduce the levels of plasma D-D and β-HCG in the conservative treatment of ectopic pregnancy.

Seminal plasma miR-122-3p and miR-141-5p stability and its diagnosis value for idiopathic asthenospermia / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To explore the stability of seminal plasma miR-122-3p and miR-141-5p and their diagnostic value for idiopathic asthenospermia.</p><p><b>METHODS</b>Seminal plasma miR-122-3p and miR-141-5p with various incubation time, freeze-thaw cycles and incubation time were analyzed. Real-time fluorescence quantitative polymerase chain reaction (RT-PCR) was used to detect the content of miR-122-3p and miR-141-5p, with U6 snRNA as the reference. The idiopathic asthenospermia group was further divided into grade I and II based on the progressive motility percent, and the content of miR-122-3p and miR-141-5p in the two grades were compared.</p><p><b>RESULTS</b>No difference was detected after incubation at room temperature and 4 degrees Celsius. But seminal plasma miR-122-3p and miR-141-5p have decreased along with the increase in freeze-thaw cycles increases. RT-PCR assayed showed that the miR-122-3p content in the idiopathic asthenospermia group was significantly lower than the control group, while miR-141-5p was significantly higher. The difference in both miR-122-3p and miR-141-5p content was statistically significant (P < 0.05). A significant difference in miR-122-3p and miR-141-5p content between a and b groups was also detected (P < 0.05). The AUC-ROC of miR-122-3p was 0.88. At the cutoff value of 1.02, the sensitivity and specificity was 83% and 84%, respectively. At the cutoff of 2.95, the AUC-ROC of miR-141-5p was 0.88. The sensitivity and specificity was 84% and 70%, respectively.</p><p><b>CONCLUSION</b>MiR-122-3p and miR-141-5p in seminal plasma are stable and have certain value for the diagnosis of idiopathic asthenospermia.</p>

Treatment of multiple level noncontiguous thoracolumbar fractures with posterior pedicle screw / 中国综合临床

Objective To explore the clinical effect of posterior pedicle screw internal fixation in the treatment of multiple level noncontiguous thoracolumbar fractures.Methods Thirteen patients with multiple level noncontiguous thoracolumbar fractures were treated by posterior pedicle screw internal fixation.The Frankel score,percentage of vertebral compression and Cobb angle of the injured vertebral segment were analyzed to evaluate the surgery efficacy.Results All patients were followed up from 12 to 24 months ( averaged 15 months ).All cases achieved bone fusion with no implant failure.The Cobb angle of the injured vertebral segment was corrected from preoperative(22.2 ±5.3) degree to postoperative(5.3 ±3.5) degree and(6.2 ±3.6) degree at the last follow up.The percentage of vertebral compression was corrected from preoperative (45.7 ± 14.1 )％ to postoperative ( 6.1 ± 3.8 ) ％ and ( 7.2 ± 3.9 ) ％ at the last follow up.All improvements showed significant differences when compared statistically( t =15.03,t =12.05,Ps ＜0.05 ).The spinal cord function was improved 1 to 2 degree in all patients except 2 patients of grade A.Conclusion The posterior fixation with pedicle screw is a secure,safe and effective method in treating multiple level noncontiguous thoracolumbar fracture.

External fixator with lumbopelvic distraction spondylodesis for vertically unstable pelvic fracture / 中华骨科杂志

Objective To evaluate the clinical outcomes of external fixator with lumbopelvic distraction spondylodesis in treatment of vertically unstable pelvic fractures. Methods From January 2008 to March 2009, 9 patients (4 males and 5 females) with a vertically unstable pelvic fracture were treated with modular external fixator with lumbopelvic distraction spondylodesis. According to the classification of Tile, 9fractures were classified as type C. This fixation construct comprises a vertical lumbopelvic distraction component which fixed L4.5 and the posterior superior iliac spine and a transverse fixation which fixed anterior iliac spine with external fixator. Results All patients were followed up 12-18 months after surgery, with an average of 14.3 months. Postoperative X-ray showed satisfactory reduction of pelvic fracture. Pelvic fractures healed in all patients without loss of reduction 3-6 months after operation. According to Matta reduction evaluation criteria, 6 patients were excellent and 3 good. For the two patients with sacral neurological injuries,appropriate surgical decompression was performed to improve the symptom and minimize the deformity. No iatrogenic complications of neurovascular injury occurred. Patients now walk unassistedly without pain in the waist or legs, and with no shortening of lower limbs or claudication. By considering symptom and satisfactory scores, the Majeed functional assessment revealed that seven patients had excellent results and two good at one year. Conclusion External fixator with lumbopelvic distraction spondylodesis that allowed early mobilization and ambulation, with general applicability and definite safety, is an effective surgical technique for the treatment of vertically unstable pelvic fracture.