Based on the analysis of 26 malignant trophoblastic tumor patients detected by CDFI (Color Dopper Flow Image) and PD between 2001 and 2005,the article is an attempt to explore the clinical significance of CDFI and PD in treating the trophoblastic diseases in the early stage,including diagnosing the pathologic process,judging the chemotherapy effect and predicting the pathologic changes.

BACKGROUND: The most commonly used rod-screw posterior spinal fixation system has some biomechanical drawbacks. The screw-plate system is more preferred for patients.OBJECTIVE: To prepare a new posterior spinal fixation system based on imaging results of distance between two pedicles,radian of spine flexion, extension and the height of intervertebral space of Chinese population.METHODS: The thoracolumbar data of 129 normal people were measured. According to the imaging measurements and relative documents, a device of gear-distraction plate (GDP) for spine reduction and fixation was designed. Eighteen fresh calf lumbar specimens were randomly divided into 3 groups, the test group was fixed by GDP and the other groups were fixed by CD and Steffee plate, respectively. The results of the displacement, strain, strength, stiffness and ultimate strength were measured under the states of vertical compression, flexion, extension and lateral bending respectively, and the results were statistically analyzed.RESULTS AND CONCLUSION: GDP could meet the need of strength and stiffness of human bodies. It showed superior to the CD and Steffee plate groups in strength and stiffness (P ＜ 0.05), with 13% or 14% torsion intensity greater than that of the CD or Steffee plate groups. The ultimate mechanical performance test showed that, the load bearing of the GDP group was greater than that of the CD and Steffee plate groups (P ＜ 0.05). The findings demonstrated that GDP for Chinese human presented with good biomechanical stability, which can promote vertebrae fracture union and prevent kyphosis relapses or vertebral height loses.

Background The simplex congenital blepharoptosis is the common blepharon motor dysfunction disease.Some researches have shown that congenital blepharoptosis is related to the hypoplasia of levator.Objective This study was to investigate the thickness and pathological features of levator palpebrae superioris aponeurosis in congenital blepharoptosis patients.Methods A prospective cohort study was carried out in Anyang Eye Hospital from March 2012 to April 2014.Eighty-five eyes of 56 patients with congenital blepharoptosis were divided into mild (15 eyes), moderate (25 eyes) and severe blepharoptosis (19 eyes) groups, and the fellow eyes of monocular blepharoptosis was used as fellow eye group (26 eyes).Twenty-six eyes of 13 normal subjects were recruited for the normal control group.The thickness of levator aponeurosis was measured by ultrasound biomicroscope (UBM) , and the shifting range of levator aponeurosis was detected by using measuring scale.Levator aponeurosis specimens were collected during the levator palpebrae superioris shortening surgery for the pathological examination.The study was approved by the medical ethics committee of Anyang Eye Hospital, and the patients or their guardian signed the informed consent.Results The thickness of levator aponeurosis was (0.331±0.018), (0.373±0.026), (0.539± 0.023) , (0.557 ± 0.024) and (0.547 ± 0.028) mm in the severe blepharoptosis group, moderate blepharoptosis group,mild blepharoptosis group, normal control group and fellow eye group, respectively, showing a significant difference among them (F =1.681, P =0.043).The thickness values of levator aponeurosis were considerably lower in the severe blepharoptosis group and moderate blepharoptosis group than those in the mild blepharoptosis group,fellow eye group and normal control group (all at P＜0.05) , and the thickness value of levator aponeurosis was significantly reduced in the severe blepharoptosis group compared with the moderate blepharoptosis group (P＜0.05).Pathological examination showed arranging disorder of muscle fibers,hyaline-like degeneration, connective tissue hyperplasia and interruption of endomysium.The number of eyes with severe hyaline-like degeneration and connective tissue hyperplasia was significantly increased in the severe blepharoptosis group than that in the moderate blepharoptosis group or the mild blepharoptosis group, as well as in the moderate blepharoptosis group than that in the mild blepharoptosis group(all at P＜0.01).The adipose cells in muscle in the mild blepharoptosis group, moderate blepharoptosis group and severe blepharoptosis group were (12.35±4.62), (17.58±7.46) and (26.19±10.81)/field,and adipose cells in the severe blepharoptosis group were significantly more than those in the mild and moderate blepharoptosis groups (t =5.60, P =0.00;t =2.71, P =0.01).A significant increase in the adipose cells also was seen in the moderate blepharoptosis group compared with the mild blepharoptosis group (t =2.44, P =0.02).Conclusions UBM can offer accurate thickness data of levator aponeurosis.The combination of thickness data and shifting range measurement of levator aponeurosis is helpful for the evaluation of muscle strength.The development of levator aponeurosis appears to be abnormal in congenital blepharoptosis patients.The histopathological change parallels to the severity of the disease.

Hepatic venous outflow obstruction is a severe complication after liver transplantation, often occurs after living donor liver transplantation (LDLT). In this article, the clinical and imaging data of two patients with hepatic venous outflow obstruction after LDLT were analyzed retrospectively, and the related literatures were reviewed to explore the diagnosis and the interventional therapy of this complication. Hepatic venous outflow obstruction can be confirmed with percutaneous transhepatic venography. Percutaneous interventional managements, including balloon angioplasty and stent implantation are safe, easy and effective for the treatment of hepatic venous outflow obstruction after adult-to-adult living donor liver transplantation (A-A LDLT).

Objective To analyze the clinical manifestation,imaging data and genetics mutation variants of late onset familial Alzheimer's disease concomitant with a novel mutation of presenilin 1.Methods The clinical manifestations and auxiliary examination recordings of the pedigree were analyzed.DNA was extracted from peripheral blood samples of the proband and her sons.Mutational analysis was performed by the next-generation sequencing technology and the mutation event was confirmed by Sanger sequencing technology.Results Two patients of the family presenting as Alzheimer's dementia were late onset.MRI of the proband showed extensive cerebral microbleeds.The gene detection showed p.S289P mutation in the exon 8 of presenilin 1 of the proband.Conclusion Mutation of p.S289P in the presenilin 1 gene may contribute to late onset Alzheimer's disease accompanied by amyloid angiopathy.

Objective To explore the efficacy of blunt separation method in midline catheter intubation in elderly patients with coagulation dysfunction.Methods A total of 80 elderly patients with coagulation dysfunction were selected in the convenience sampling method from October 2022 to April 2023 in our hospital,and they were randomly divided into an experimental(blunt)group and a control(routine)group,with 40 patients in each group.The differences in the degree of bleeding and exudation at the puncture site,the pain score and the incidence of complications(including bleeding and exudation,phlebitis,symptomatic catheter-related thrombus,catheter blockage,catheter pulling-off)were compared between 2 groups.Results In the experimental group,the degree of bleeding and exudation at the puncture point immediately after the operation,degree of bleeding and exudation at the puncture point 24 hours after the operation,pain score 1 day after the catheterization,pain score 3 days after the catheterization,incidence of bleeding and exudation,total incidence of complications and maintenance times were significantly lower than these in the control group(P＜0.05).In terms of the pain score immediately after the operation,pain score 5 days after the operation,incidence of phlebitis,incidence of symptomatic catheter-related thrombosis,incidence of catheter blockage,incidence of catheter pulling-off,incidence of catheter related skin injury,incidence of unplanned extubation,success rate of one-time sheath delivery and the indwelling time,the differences between the experimental group and control group were not significant(P＜0.05).Conclusion The application of blunt separation method in midline catheter indwelling can significantly reduce the incidence and degree of bleeding at the puncture point,decrease the maintenance times and relieve the pain in elderly patients with coagulation dysfunction.

Objective: To monitor the antimicrobial resistance and drug-resistance genes of Yersinia enterocolitis, Y. intermedia and Y. frederiksenii recovered from retailed fresh poultry of 4 provinces of China. Methods: The susceptibility of 25 isolated Yersinia spp. to 14 classes and 25 kinds of antibiotics was determined by broth microdilution method according to CLSI (Clinical and Laboratory Standards Institute). The antibiotic resistance genes were predicted with antibiotic resistance genes database (ARDB) using whole genome sequences of Yersinia spp. Results: In all 22 Y. enterocolitis tested, 63.7% (14 isolates), 22.8% (5 isolates), 4.6% and 4.6% of 1 isolates exhibited the resistance to cefoxitin, ampicillin-sulbactam, nitrofurantoin and trimethoprim-sulfamethoxazole, respectively. All the 25 isolates were multi-drug resistant to more than 3 antibiotics, while 64.0% of isolates were resistant to more than 4 antibiotics. A few Y. enterocolitis isolates of this study were intermediate to ceftriaxone and ciprofloxacin. Most Yersinia spp. isolates contained antibiotic resistance genes mdtG, ksgA, bacA, blaA, rosAB and acrB, and 5 isolates recovered from fresh chicken also contained dfrA1, catB2 and ant3ia. Conclusion The multi-drug resistant Yersinia spp. isolated from retailed fresh poultry is very serious in the 4 provinces of China, and their contained many kinds of drug-resistance genes.

OBJECTIVE: To investigate whether the Runx2 gene can induce the differentiation of human amniotic mesenchymal stem cells (hAMSCs) to ligament fibroblasts in vitro and promote the tendon-bone healing in rabbits. METHODS: hAMSCs were isolated from the placentas voluntarily donated from healthy parturients and passaged, and then identified by flow cytometric identification. Adenoviral vectors carrying Runx2 gene (Ad-Runx2) and empty vector adenovirus (Ad-NC) were constructed and viral titer assay; then, the 3rd generation hAMSCs were transfected with Ad-Runx2 (Ad-Runx2 group) or Ad-NC (Ad-NC group). The real-time fluorescence quantitative PCR and Western blot were used to detect Runx2 gene and protein expression to verify the effectiveness of Ad-Runx2 transfection of hAMSCs; and at 3 and 7 days after transfection, real-time fluorescence quantitative PCR was further used to detect the expressions of ligament fibroblast-related genes [vascular endothelial growth factor (VEGF), collagen type Ⅰ, Fibronectin, and Tenascin-C]. The hAMSCs were used as a blank control group. The hAMSCs, hAMSCs transfected with Ad-NC, and hAMSCs were mixed with Matrigel according to the ratio of 1 : 1 and 1 : 2 to construct the cell-scaffold compound. Cell proliferation was detected by cell counting kit 8 (CCK-8) assay, and the corresponding cell-scaffold compound with better proliferation were taken for subsequent animal experiments. Twelve New Zealand white rabbits were randomly divided into 4 groups of sham operation group (Sham group), anterior cruciate ligament reconstruction group (ACLR group), anterior cruciate ligament reconstruction+hAMSCs transfected with Ad-NC-scaffold compound group (Ad-NC group), and anterior cruciate ligament reconstruction+hAMSCs transfected with Ad-Runx2-scaffold compound group (Ad-Runx2 group), with 3 rabbits in each group. After preparing the ACL reconstruction model, the Ad-NC group and the Ad-Runx2 group injected the optimal hAMSCs-Matrigel compunds into the bone channel correspondingly. The samples were taken for gross, histological (HE staining and sirius red staining), and immunofluorescence staining observation at 1 month after operation to evaluate the inflammatory cell infiltration as well as collagen and Tenascin-C content in the ligament tissues. RESULTS: Flow cytometric identification of the isolated cells conformed to the phenotypic characteristics of MSCs. The Runx2 gene was successfully transfected into hAMSCs. Compared with the Ad-NC group, the relative expressions of VEGF and collagen type Ⅰ genes in the Ad-Runx2 group significantly increased at 3 and 7 days after transfection ( P<0.05), Fibronectin significantly increased at 3 days ( P<0.05), and Tenascin-C significantly increased at 3 days and decreased at 7 days ( P<0.05). CCK-8 detection showed that there was no significant difference ( P>0.05) in the cell proliferation between groups and between different time points after mixed culture of two ratios. So the cell-scaffold compound constructed in the ratio of 1∶1 was selected for subsequent experiments. Animal experiments showed that at 1 month after operation, the continuity of the grafted tendon was complete in all groups; HE staining showed that the tissue repair in the Ad-Runx2 group was better and there were fewer inflammatory cells when compared with the ACLR group and the Ad-NC group; sirius red staining and immunofluorescence staining showed that the Ad-Runx2 group had more collagen typeⅠ and Ⅲ fibers, tending to form a normal ACL structure. However, the fluorescence intensity of Tenascin-C protein was weakening when compared to the ACLR and Ad-NC groups. CONCLUSION Runx2 gene transfection of hAMSCs induces directed differentiation to ligament fibroblasts and promotes tendon-bone healing in reconstructed anterior cruciate ligament in rabbits.
Pregnancy ; Female ; Humans ; Rabbits ; Animals ; Vascular Endothelial Growth Factor A/metabolism* ; Fibronectins/metabolism* ; Collagen Type I/genetics* ; Tenascin/metabolism* ; Collagen/metabolism* ; Anterior Cruciate Ligament/surgery* ; Mesenchymal Stem Cells ; Tendons/metabolism* ; Fibroblasts/metabolism*

Acute ischemic stroke (AIS), as the third leading cause of death worldwide, is characterized by its high incidence, mortality rate, high incurred disability rate, and frequent reoccurrence. The neuroprotective effects of Ginkgo biloba extract (GBE) against several cerebral diseases have been reported in previous studies, but the underlying mechanisms of action are still unclear. Using a novel in vitro rat cortical capillary endothelial cell-astrocyte-neuron network model, we investigated the neuroprotective effects of GBE and one of its important constituents, Ginkgolide B (GB), against oxygen-glucose deprivation/reoxygenation and glucose (OGD/R) injury. In this model, rat cortical capillary endothelial cells, astrocytes, and neurons were cocultured so that they could be synchronously observed in the same system. Pretreatment with GBE or GB increased the neuron cell viability, ameliorated cell injury, and inhibited the cell apoptotic rate through Bax and Bcl-2 expression regulation after OGD/R injury. Furthermore, GBE or GB pretreatment enhanced the transendothelial electrical resistance of capillary endothelial monolayers, reduced the endothelial permeability coefficients for sodium fluorescein (Na-F), and increased the expression levels of tight junction proteins, namely, ZO-1 and occludin, in endothelial cells. Results demonstrated the preventive effects of GBE on neuronal cell death and enhancement of the function of brain capillary endothelial monolayers after OGD/R injury in vitro; thus, GBE could be used as an effective neuroprotective agent for AIS/reperfusion, with GB as one of its significant constituents.
Animals ; Apoptosis ; drug effects ; Brain Ischemia ; drug therapy ; Cell Survival ; Cells, Cultured ; Disease Models, Animal ; Endothelial Cells ; drug effects ; Ginkgolides ; pharmacology ; Glucose ; Lactones ; pharmacology ; Neurons ; drug effects ; Neuroprotective Agents ; pharmacology ; Oxygen ; Plant Extracts ; pharmacology ; Rats ; Stroke ; drug therapy