Aim To compare the different effect of intracarotid and intravenous injection of propofol on the neuronal apoptosis of hippocampus in rats undergoing cardiopulmonary bypass.Methods Fifty rats were randomly assigned to five groups. Shame group (Group Non-CPB,n=10); group cardiopulmonary bypass(group CPB,n=10);group intravenous injection of propofol 2 mg?kg -1?h -1 (group P_ 2V,n=10);group intravenous injection of propofol 10mg.kg -1?h -1 (group P_ 10V,n=10);group intracarotid injection of propofol 2 mg?kg -1?h -1 (group P_ 2a,n=10).Mean arterial pressure(MAP)and heart rate(HR) were monitored. Changes of the neuronal apoptosis of hippocampus were observed with TUNEL staining, Bax and bcl-2 mRNA and protein expressions were measured by RT-PCR and Western blot. In addition,neuronal ultrastructures were observed. Results Neuronal apoptosis and changes of neuronal ultrastructures of hippocampus were attenuated in group P_ 2a and P_ 10V,but the apoptosis of neurons was not attenuated in group P_ 2v. Bcl-2 and Bax mRNA expression increased undergoing CPB. Bax mRNA expression decreased after CPB in group P_ 2a and P_ 10V. Bcl-2 mRNA expression increased in group P_ 2a and P_ 10V. But Bcl-2 and Bax mRNA expression in group P_ 2V was not significantly different compared with that of group CPB. Bcl-2 and Bax protein expression measured by Western blot showed the same trend with mRNA expressions. Compared with baseline values, MAP and HR in group P_ 2V and P_ 2a remained unchanged. But the MAP and HR in group P_ 10V changed compared with group CPB and baseline value.Conclusions intracarotid injection of propofol attenuated the injury of brain at a fraction of the intravenous dose and with less adverse systemic and cerebrovascular side effects.

Aim To investigate the protective effects of high concentration fentanyl on the brain slice injury induced by oxygen glucose deprivation(OGD).Methods Rat brain slices were made and randomly assigned to four groups:control(n=10),OGD(n=10),fentanyl 50 ?g?L~(-1)(F_(50),n=10) and fentanyl 500 ?g?L~(-1)(F_(500),n=10).Changes of the neuron injury and apoptosis were observed with TTC staining,LDH releases,TUNEL staining,immunohistochemistry and electromicroscope.In addition,changes of intracellular calcium were measured with confocal laser-scanning microscopy.Results F_(50) and F_(500) attenuated the decrease of TTC staining and the increase of LDH release induced by OGD in brain slices.Neuronal apoptosis and changes of neuronal ultrastructures were attenuated by F_(50) and F_(500).Bcl-2 and Bax protein expressions were increased after OGD.Bax protein expression was decreased by F_(50) and F_(500),while Bcl-2 protein expression was increased by F_(50)and F_(500).Intracellular calcium concentration was increased by OGD and then it was lowered by F_(50) and F_(500).The protective effects of F_(50) were more obvious than that of F_(500).Conclusions High concentrations of fentanyl have neuron protective effects against OGD injury in rat brain slices,and fentanyl 50 ?g?L~(-1) has more obvious protective effects than fentanyl 500 ?g?L~(-1).

Objective To establishing an immortal cell line of familial papillary thyroid carcinoma (FPTC), and explore a new approach for studying familial non-medullary thyroid carcinoma (FNMTC). Methods The specimen from a patient with FPTC was selected, separated, and the primary cells were cultured using DMEM/F12 medium (with TSH, T3, EGF and hydrocortisone). To inducing cell immortalization, the exogenous genes SV40T/TERT were transfected into cells by two ways. RT-PCR was used to detect the expressions of thyroid peroxidase (TPO), thyroid globulin (TG), thyroid stimulating hormone receptor (TSHR) and sodium/iodide co-transporter (NIS). Immunofluorescence method was used to detect the expressions of TPO and GPC3. In order to detect the genomic mutations, the peripheral blood DNA of the patient was extracted. The cell genome was detected. Results The FPTC cells adhered to the plate and showed an irregular polygon shape. The cells can stably grow for six months, FPTC-S (with SV40T transfected) passaged to p26, FPTC cells passaged to p23 and FPTC-ST (with SV40T/TERT transfected) passaged to p19. Both FPTC-S and FPTC-ST can stably express TPO, TG and TSHR in mRNA level. MLH1 R217C mutation existed in the peripheral blood of the patient, and BRAF V600E mutation existed in the primary cultured cells. Either the primary or the immortal cells showed MLH1 R217C mutation. Conclusion This study preliminarily established an immortal cell line of familial papillary thyroid carcinoma with MLH 1 R217C and BRAF V600E mutations. This cell line provides a research model for studying these mutations in FPTC.

Objective:To evaluate a self-designed intelligent robot-assisted minimally invasive reduction system in the reduction of unstable pelvic fractures by a cadaveric anatomic study.Methods:Ten unembalmed cadavers (7 male and 3 female ones) were used in this study. In each cadaveric specimen an unstable pelvic fracture was created in accordance with clinical case models (3 cases of type B1, 4 cases of type B2 and 3 cases of type C1 by the Tile classification). A self-designed intelligent robot-assisted minimally invasive reduction system was used to assist the reduction in the cadaveric models. Intraoperative registration and navigation time, autonomous reduction time, total operation time and reduction error were measured.Results:Effective reduction was completed in 10 bone models with the assistance of our self-designed intelligent robot-assisted minimally invasive reduction system. The time for intraoperative registration and navigation averaged 47.4 min (from 32 to 74 min), the autonomous reduction time 73.9 min (from 48 to 96 min), and the total operation time 121.3 min (from 83 to 170 min). The reduction error averaged 2.02 mm (from 1.67 to 2.62 mm), and the reduction results met the clinical requirements.Conclusion:Our self-designed intelligent robot-assisted minimally invasive reduction system is a new clinical solution for unstable pelvic fractures, showing advantages of agreement with clinical operative procedures, high reduction accuracy and operational feasibility, and reduced radiation exposure compared to a conventional operation.

Anti-motion artifact is one of the most important properties of ambulatory ECG monitoring equipment. At present, there is a lack of standardized means to test the performance of anti-motion artifact. ECG simulator and special conductive leather are used to build the simulator, it is used to simulate human skin, to generate ECG signal input for the ECG monitoring equipment attached to it. The mechanical arm and fixed support are used to build a motion simulation system to fix the conductive leather. The mechanical arm is programmed to simulate various motion states of the human body, so that the ECG monitoring equipment can produce corresponding motion artifacts. The collected ECG signals are read wirelessly, observed, analyzed and compared, and the anti-motion artifact performance of ECG monitoring equipment is evaluated. The test results show that by artificially creating the small difference between the two groups of ambulatory ECG monitoring equipment, the system can accurately test the interference signals introduced under the conditions of controlled movement such as tension and torsion, and compare the advantages and disadvantages. The research shows that the test system can provide convenient and accurate verification means for the research of optimizing anti-motion interference.
Humans ; Artifacts ; Signal Processing, Computer-Assisted ; Electrocardiography, Ambulatory/methods* ; Electrocardiography ; Motion

Etiological research is necessary for understanding the occurrence and epidemiological patterns of diseases, and is also a prerequisite for the diagnosis, prevention and treatment of clinical diseases. Mendelian randomization(MR), a method of research that combines genetics and epidemiology, has the advantage of exploring the causal relationship between exposure and disease genetically as well as avoiding confounding factors and reverse causation. Thus, it has been extensively utilized in the etiological study of diseases. This paper reviews the implementation of MR in the research of ocular diseases and provides ideas and approaches for the investigation of related mechanisms as well as the development of intervention strategies.