Search

Background Heart rate variability (HRV) is commonly used to evaluate the short-term prognosis of coronary artery diseaseas a well-known non-invasive indicator of cardiac autonomic function. Percutaneous coronary intervention (PCI) is a commonly usedsuigical treatment of coronary artery disease, however, major adverse cardiac event (MACE) such as malignant arrhythmias and recurrent myocardial infarction are common after suigical treatment. Although dual antiplatelet therapy (DAPT) can reduce the occurrence of MACE to a certain extent, it is prone to be complicated with gastrointestinal bleeding, and unable to consistently improve the prognosis of PCI. Ocular acupuncture can effectively reduce the duration and frequency of chest pain, and exercise therapy can enhance the function of heart and blood vessels. The application of ocular acupuncture and exercise combination therapy (OAECT) after PCI remains to be explored. Objective To investigate the effect of OAECT on postoperative heart rate variability and prognosis of patients treated with PCI. Methods A total of 32 CHD patients after PCI with moderate and low risk attending Hospital of Chengdu University of Traditional Chinese Medicine were selected and randomly divided into the OAECT group and drug treatment group in a 1∶1 allocation ratio. Patients in the OAECT group received OAECT in addition to DAPT, patients in the drug treatment group received DAPT alone, patients in both 2 groups completed the 2-week intervention. The data of patients was collectedas follows: (1) Baseline indicators: gender, age, height, weight, blood pressure, respiratory rate, interval between onset and intervention, education level, occupation, severity of coronary artery disease, and number of underlying diseases. (2) Main indicators: HRV within 24 h after PCI and on the day of the end of 2-week intervention, including the standard deviation of all normal to normal RR intervals (SDNN) , standard deviation of all 5-minute RR intervals (SDANN) , mean of the standard deviation of all NN intervals for all 5-min segment of 24 hours (SDNN index) , root mean square of difference between adjacent NN intervals (rMSSD) , percent of NN50 in the total number of NN intervals (PNN50) , high frequency (HF) , low frequency (LF) low frequency/high frequency (LF/HF) values. Prognosis at 2, 4, and 8 weeks after the intervention assessed by MACE, including cardiac or all-cause deaths, malignant arrhythmias such as ventricular tachycardia and ventricular fibrillation, severe heart failure, recurrent myocardial infarction, repeat PCI and chest pain recorded by telephone and outpatient consultations. (3) Secondary indicators: C-reactive protein (CRP) , N-terminal pro B type natriuretic peptide (NT-proBNP) , creatine kinase isoenzyme (CK-MB) , high-sensitivity troponin I (hs-TnI) . (4) Safety indicators: the occurrence of complications after PCI such as subcutaneous hematoma, skin lesions, muscle soreness, respiratory abnormalities and stroke, all the outcome indicators were measured within 24 hours after PCI and on the day of the end of 2-week intervention. Results There was no significant difference in LF/HF, SDNN, SDANN, SDNN index, LF, HF, RMSSD and PNN50 between the 2 groups (P>0.05) . There were significant differences in LF/HF, SDNN and SDANN (P0.05) . The incidence rates of MACE and adverse reactions in the OAECT group were lower than DAPT group (P

At present, the mainstream radar sensors are difficult to meet the demands of the light-weighted and small unmanned aerial vehicle (UAV), which usually need high cost of data acquisition and complicate models of algorithm. A highly integrated, lightweight and reliable radar system is deigned, which can be carried on the light-weighted and small UAV. Based on this system, a novel method has been developed for vegetation height information inversion. The inversion algorithm suppress the direct coupled wave by two-dimensional filtering, settle the unstable selection of principle component by the adaptive principle component analysis denoting method with residual image entropy, further enhance the target signal by the back-projection algorithm based on cross-correlation information and finally extract the vegetation height by implementing Sobel operator. The experiment results show that the correlation between the vegetation height derived from the proposed method and the verified data is 0. 92, and the root mean square error is 1. 28 m. [ABSTRACT FROM AUTHOR]

Objective: To investigate the concentrations of vascular endothelial growth factor (VEGF), pigment epithelium-derived factor (PEDF), inositol triphosphate (IP3) and diacylglycerol (DAG) in human retinal pigment epithelium (RPE) cells after exposuring to blue light, and to explore the relationship with Ca2+-PKC signaling pathways, to evaluate the role of Ca2+-PKC signaling pathways of blue-light irradiation induced apoptosis in RPE cells., Methods: The fourth generation human RPE cells in vitro were exposured to blue light (2000±500 lux) for 6 hours, 24 hours prolongation of post-exposure culture. The concentrations of VEGF, PEDF, IP3 and DAG were assayed by enzyme linked immunosorbent assay (ELISA). Cells were randomly divided into 6 groups, group A (control), group B (exposure to blue light), group C (exposure to blue light+PMA), group D (exposure to blue light+Calphostin C), group E (exposure to blue light+Nifedipine), group F (exposure to blue light+Calphostin C+Nifedipine). Flow cytometry was used to detect the apoptosis rate of human RPE cells in A, B and F group., Results: Comparing with group A (584.38±10.66), the concentration of VEGF in group B (700.70±5.88), group C (698.21±6.66) and group E (648.30±4.91) was higher, the difference was statistically significant (P=0.002, 0.002, 0.016). Comparing with group B (700.70±5.88), the concentration of VEGF in Group D (623.87±3.12) and E (648.30±4.91) was lower (P=0.001, 0.002). Comparing with group A (75.96±1.70), the concentration of PEDF in Group B (71.82±1.67) and C (72.43±0.58) was lower (P=0.004, 0.011), but the concentration of PEDF in Group D (86.31±1.35) and E (93.72±1.24) was higher (P=0.000, 0.000). Comparing with group B (71.82±1.67), the concentration of PEDF in Group D (86.31±1.35) and E (93.72±1.24) was higher (P=0.000, 0.000). Comparing with group A (7.70±0.29), the ratio of VEGF to PEDF in Group B (9.85±0.34) and Croup C (9.64±0.02) was higher (P=0.008, 0.027) Comparing with group B, The ratio of VEGF to PEDF in Group D (7.23±0.08) and E (6.92±0.06) was lower (P=0.016, 0.015). Comparing with group A (108.42±0.75, 995.47± 13.61), the concentration of IP3 and DAG in Group B (117.24±1.06, 1070.10±10.07), C (137.12±2.71, 1046.40±7.90), D (139.17±1.40, 1041.13±9.76) and E (149.61±0.77, 1273.14±10.89) was higher, the difference was statistically significant (P=0.003, 0.007, 0.000, 0.000, 0.000, 0.000, 0.000, 0.000). Comparing with group B, the concentration of IP3 in Group C, D and E was higher (P=0.011, 0.000, 0.000). Comparing with group B, the concentration of DAG in Group C and D was lower (P=0.021, 0.007). Comparing with group B, the concentration of DAG in Group E was higher (P=0.000). Comparing with group A (10.27±1.88), the apoptosis rate of RPE cells in Group B(25.07±2.66) and F(19.37±3.23) was higher, the difference was statistically significant (P=0.001, 0.009). Comparing with group B (25.07±2.66), the apoptosis rate of RPE cells in Group F (19.37±3.23) was lower (P=0.038)., Conclusions: (1) After exposuring to blue light, the concentrations of VEGF, IP3 and DAG are increased and the ratio of VEGF to PEDF is also increased and the concentration of PEDF is decreased in human RPE cells. (2) L-Type Calcium Channels and Ca2+-PKC signaling pathways may be regulate the concentrations of VEGF, PEDF, IP3 and DAG in RPE cells after exposuring to blue light by feedback regulation. (3) The application of Calphostin C combined with Nifedipine may be restrain the apoptosis of RPE cells after exposuring to blue light.

Objective: To investigate the effect of blue light on human retinal pigment epithelium (RPE) α1D subunit protein expression and its relationship with vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) secretion in vitro., Methods: The fourth generation cultured human RPE cells in vitro were randomly divided into 4 groups, group A (control), group B (exposure to blue light), group C (exposure to blue light+nifedipine), group D [exposure to blue light+(-)Bay K8644]. Cells were exposed to blue light (2 000 ± 500) lx for 6 hours, and cells culture completed 24 hours later. VEGF and bFGF concentration were assayed by enzyme linked immunosorbent assay (ELISA). Real-time polymerase chain reaction was used to analysis L-type calcium channel α1D subunit mRNA expression. Western blot was used to examine the protein expression of L-type calcium channel α1D subunit. Analysis of variance was used to compare the difference of α1D subunit mRNA and protein expression, VEGF and bFGF concentration between groups. Correlation analysis was used to show the relationship between α1D subunit protein expression and concentration of VEGF and bFGF., Results: (1) There is significant statistically difference in the population mean of VEGF and bFGF concentration in four groups (F = 99.441, 21.310, P = 0.000,0.000) . VEGF and bFGF concentration in group B (3 281.51 ± 251.73, 1 346.81 ± 62.27) and group D (3 808.01 ± 94.01, 1 485.82 ± 108.97) was higher than it was in group A (2 401.09 ± 228.07, 1 232.42 ± 65.41) , which was statistically different (P = 0.000, 0.000, 0.019, 0.000). And it was higher in group D (3 808.01 ± 94.01, 1 485.82 ± 108.97) compared with group B (3 281.51 ± 251.73, 1 346.81 ± 62.27) (P = 0.000, 0.006). While, it was lower in group C (1 927.28 ± 143.11, 1 149.39 ± 62.99) than it was in group B (3 281.51 ± 251.73, 1 346.81 ± 62.27) (P = 0.000, 0.000) . (2) The mean of mRNA expression of α1D subunit between four groups was statistically significant (F = 50.320, P = 0.000) . It was higher in group B (210 ± 23) , group D (478 ± 80) and group C (232 ± 14) than group A (100 ± 20). It was statistically significant different (P = 0.023, 0.006, 0.010). And it was higher in group D (478 ± 80) than group B (210 ± 23) and C (232 ± 14) (P = 0.032, 0.039). (3) There was statistically significant difference in the expression of L-type calcium channel α1D subunit protein in four groups (F = 1 940.363, P = 0.000) . It was significantly higher (P = 0.000,0.000) in group B (0.974 2 ± 0.014 7) and group D (0.654 9 ± 0.005 0) than group A (0.503 2 ± 0.007 5). And it was higher in group D (0.654 9 ± 0.005 0) than it was in group C (0.413 9 ± 0.008 8) (P = 0.000). (4) There was positive correlation between the L-type calcium channel α1D subunit protein expression and VEGF concentration secreted by retinal pigment epithelium cells (r = 0.674, F = 8.333, P = 0.016), but there was no correlation with bFGF concentration (r = 0.537, F = 4.061, P = 0.072)., Conclusions: L-type calcium channel α1D subunit may be involved in blue light induced damage on human retinal pigment epithelial cells. Blue light exposure can induce the mRNA and protein expression of α1D subunit, VEGF and bFGF concentration in retinal pigment epithelium cells Increased. And there was a positive correlation between α1D subunit protein expression and the VEGF concentration.

This paper is to establish a three-dimensional finite element model (3D-FEM) of pelvic floor levator ani muscles in an old healthy women. We acquired the image data of the pelvic bones and pelvic floor muscles from CT and MRI scanning in a non-pregnant old healthy female volunteers. The 3-D reconstruction and mesh optimization of the whole pelvic bones and muscles with application of image processing software Mimics12.0 and Geomagic9.0 were obtained. Then we built the 3D-FEM of the musculoskeletal system of the pelvic bones and levator ani muscles with Ansys11.0 software. We obtained an accurate 3D-FEM of pelvic bones and levator ani muscles in the older healthy woman. The results showed that it was reliable to build 3D-FEM with CT and MRI scanning data and this model could vividly reflect the huge space anatomy of the real pelvic floor levator ani muscles. It avoids the defects to gain the model from the body of anatomical specimens in the past. The image data of model are closer to vivisection, and the model is more conducive to the latter finite element analysis.