Dopaminergic Neurons in the Ventral Tegmental-Prelimbic Pathway Promote the Emergence of Rats from Sevoflurane Anesthesia / 神经科学通报·英文版

Dopaminergic neurons in the ventral tegmental area (VTA) play an important role in cognition, emergence from anesthesia, reward, and aversion, and their projection to the cortex is a crucial part of the "bottom-up" ascending activating system. The prelimbic cortex (PrL) is one of the important projection regions of the VTA. However, the roles of dopaminergic neurons in the VTA and the VTADA-PrL pathway under sevoflurane anesthesia in rats remain unclear. In this study, we found that intraperitoneal injection and local microinjection of a dopamine D1 receptor agonist (Chloro-APB) into the PrL had an emergence-promoting effect on sevoflurane anesthesia in rats, while injection of a dopamine D1 receptor antagonist (SCH23390) deepened anesthesia. The results of chemogenetics combined with microinjection and optogenetics showed that activating the VTADA-PrL pathway prolonged the induction time and shortened the emergence time of anesthesia. These results demonstrate that the dopaminergic system in the VTA has an emergence-promoting effect and that the bottom-up VTADA-PrL pathway facilitates emergence from sevoflurane anesthesia.

Clinical characteristics of acute myeloid leukemia patients with TET2 gene mutation and effects of TET2 mutation on therapeutic efficacy and prognosis / 白血病·淋巴瘤

Objective:To investigate clinical features of adult patients with acute myeloid leukemia (AML) with TET2 gene mutation and effects of TET2 mutation on therapeutic efficacy and prognosis.Methods:A total of 123 newly diagnosed adult AML patients (except for acute promyelocytic leukemia) admitted to Jining No.1 People's Hospital from March 2017 to April 2021 were selected. Mutations of 24 AML-related genes including TET2 mutation were detected by using second-generation sequencing technology. Patients were divided into two groups according to the presence of TET2 mutation: TET2 mutation group and TET2 wild type group. The differences in clinicopathological characteristics, short-term efficacy and survival of both groups were compared.Results:Among 123 patients, TET2 mutation was detected in 28 cases (22.8%). Compared with TET2 wild type group, the patients were older [(59±15) years vs.(49±16) years, t = 2.984, P = 0.003], French-American-British (FAB) Corporative Group M 4 and M 5 subtypes were more common [75.0% (21/28) vs. 51.6% (49/95), χ2 = 4.838, P = 0.028], and the positive rate of CD34 in AML patients was lower in TET2 mutation group [46.4% (13/28) vs.72.6% (69/95), χ2 = 6.685, P = 0.010]. Moreover, TET2 mutation was more likely to be accompanied with ZRSR2 mutation [10.7% (3/28) vs. 1.1% (1/95), P = 0.037] and NPM1 mutation [35.7% (10/28) vs.17.9% (17/95), χ2 = 4.008, P = 0.045], but less likely to be accompanied with IDH1/2 mutation [0 vs.17.9% (17/95), P = 0.012]. However, there were no statistically significant differences in gender, peripheral blood leukocyte count at initial diagnosis, hemoglobin level, platelet count, bone marrow blasts ratio, cytogenetics and the European LeukemiaNet (ELN) risk stratification between the two groups (all P>0.05). In addition, there were no significant differences in the overall response rate (ORR) of 1 cycle chemotherapy [75.0% (12/16) vs. 66.7% (42/63), χ2 = 0.410, P = 0.522] and demethylation therapy [66.7% (4/6) vs. 44.4% (8/18), P = 0.640]. The difference in overall survival (OS) of both groups was not statistically significant [median OS time: 23 months (95% CI 5-41 months) vs. 35 months (95% CI 18-52 months, P = 0.498]. Conclusions:In AML patients, TET2 mutation is associated with advanced age, M 4 and M 5 subtypes, and low expression of CD34 on AML blasts. TET2 mutation is commonly accompanied by ZRSR2 and NPM1 mutation, but not IDH1 or IDH2 mutation. TET2 mutation may have no significant effects on therapeutic efficacy and survival in the whole cohort of AML patients without risk stratification.

Development of DSA Information Management and Image Analysis System Based on Java Web / 中国医疗器械杂志

OBJECTIVE@#To establish a digital subtraction angiography (DSA) information management and image analysis system to realize scientific management of DSA image information and efficient processing of image data.@*METHODS@#Based on Java Web under Windows 7 environment, a dynamic Browser/Server mode system was constructed by JSP and Servlet on the network. Eclipse and MySQL were used as development tool and database development platform. Tomcat network information service was used as application server. Matlab codes were embedded to analyze DSA image.@*RESULTS@#The system consists of five modules:image information management, image processing, image analysis, advanced retrieval and clinical data management. It may complete such process as storing, deleting, saving, analyzing of DSA image and basic information of patients.@*CONCLUSIONS@#The main interface of the system is user-friendly and easy to operate. The system will be helpful to the clinical, teaching and scientific research work related to DSA.

Thalamic paraventricular nucleus mediates orexinergic neurons-induced promotion of emergence from general anesthesia in mice: evaluation using optogenetics method / 中华麻醉学杂志

Objective To evaluate whether the thalamic paraventricular nucleus mediates orexiner-gic ( orexin ) neurons-induced promotion of emergence from general anesthesia by using the optogenetics method in mice. Methods Twenty healthy male Hcrt-cre mice, aged 8-10 weeks, weighing 20-25 g, were divided into 4 groups ( n=5 each) using a random number table method: retrograde labeled viruses channelrhodopsin group ( R group) , anterograde labeled viruses channelrhodopsin group ( A group) , retro-grade labeled viruses control group ( RC group ) , and anterograde labeled viruses control group ( AC group) . The optogenetics technique was used in each group. Anesthesia was induced and maintained through inhaling 1％ isoflurane and pure oxygen 1. 0 L∕min. Electroencephalogram was monitored througout the procedure with the PowerLab monitoring system. The burst suppression ratio ( BSR) was recorded at 1 min before light stimulation and during light stimulation. Results Compared with RC group or the baseline at 1 min before light stimulation, the BSR was significantly decreased during light stimulation in R group ( P<0. 05) . Compared with AC group or the baseline at 1 min before light stimulation, the BSR was signifi-cantly decreased during light stimulation in group A ( P<0. 05) . Conclusion Optogenetics technique ap-plication once again confirms that orexin neurons can promote emergence from general anesthesia through thalamic paraventricular nucleus in mice.

Simulation study on acoustic source reconstruction of magneto-acoustic tomography with magnetic induction (MAT-MI) based on transducer / 中国医疗器械杂志

<p><b>OBJECTIVE</b>In order to accurately reconstruct the acoustic source image, the application of transducer's receiving characteristics in magneto-acoustic tomography with magnetic induction (MAT-MI) is studied.</p><p><b>METHODS</b>The conductivity phantom model is built, and the magnetic acoustic signals are simulated and the acoustic sources are reconstructed according to the transducer's receiving characteristics.</p><p><b>RESULTS</b>The reconstructed image of acoustic source is consistent with the topographic shape and size of the phantom model.</p><p><b>CONCLUSION</b>MAT-MI based on the transducer's characteristics lays the foundation for further study.</p>

Fundus images mosaicking based on edge extended phase correlation / 中国医疗器械杂志

With regard to the large amount of calculation in image mosaic algorithm, an image mosaic algorithm based on extended phase correlation of edge is presented. The improved wavelet edge detection algorithm is to detect edge of blood vessels. Then the image translation, rotation and scale changes are calculated by the extended phase correlation method. These parameters are utilized to stitch images. Finally, image fusion can be achieved by fade-in-fade-out method. It is proved by experiments that this algorithm is simple to calculate, and can effectively achieve the image mosaic.

The analysis of ECG of different state based on approximate entropy / 中国医疗器械杂志

In this study, ECG signals of normal sinus rhythm (NSR), ventricular tachycardia (VT) and ventricular fibrillation (VF) were taken out to extract the RR interval series. Approximate entropy (ApEn) values of the RR interval series were calculated and compared among the three groups by ANOVA methods. It was found that the values of ApEn were increased significantly from NSR to VT and then to VF. Approximate entropy may be regarded as an index to discriminate the ECG signals of different state.

Ri plasmid transformation and metabolism of ginseng products on HepG2 cells / 中国中药杂志

<p><b>OBJECTIVE</b>To study the Ri plasmid transformation and metabolism of ginseng products on HepG2 cells.</p><p><b>METHOD</b>The inhibitory effect of ginseng saponin on hepatoma HepG2 cells was studied. The hairy root-induced conditions were screened by orthogonal experimental design. The culture conditions were determined through hairy root biomass accumulation and saponin content. The effect of ginsenoside on HepG2 cells was determined by MTT assay.</p><p><b>RESULT AND CONCLUSION</b>The optimal ginseng hairy root inducing conditions: A = 0.6, infection time of 10 min, pre-incubation time for the 3 d. The best culture conditions: MS medium, pH 6.1, 24 degrees C. At those conditions the hairy root bio-accumulation and saponin content were higher. The results of ginseng saponins on the inhibitory effect of HepG2 cells showed that inhibition of ginseng saponins on HepG2 was the concentration positively related.</p>

Instantaneous expression aFGF-GFP fusion gene in safflower / 中国中药杂志

<p><b>OBJECTIVE</b>To study the instantaneous expression aFGF-GFP fusion gene in Carthamus tinctorius.</p><p><b>METHOD</b>Molecular biology methods were applied to construct aFGF and GFP fusion gene vector, it is transformed into C. tinctorius by Agrobacterium tumefaciens, forming the resistant callus, fluorescence microscopy was used for detection.</p><p><b>RESULT</b>aFGF gene and GFP gene were amplified by PCR reaction. It was successfully constructed plant fluorescence expression vector pCAMBIA1390: :35S: :aFGF-GFP, it was used to transform C. tinctorius, and the acquired resistance calli showed strong green fluorescence under UV light.</p><p><b>CONCLUSION</b>The expression of GFP in resistance C. tinrictorius calli is good, it is indicated that aFGF gene in plant cells has also been expressed.</p>

Based on blood vessel edge feature fundus fluorescein angiography image splicing / 中国医疗器械杂志

According to fundus fluorescein angiography images characteristics, this paper proposes a feature based image mosaic vessel edge method. First, detect edge of blood vessels by carrying on the pretreatment to the fundus fluorescein angiography image in the foundation, wavelet edge detection algorithm. Then, the matching method based on chain code feature is described. Finally, a local area based on gray level information of the image fusion method is applied to angiographic image series. Data processing results show that the method can generate an ideal mosaic effect.

Measurement of the irregular retinal lesion area based on the back propagation neural network method / 中国医疗器械杂志

In this study, the automatic segmentation of the irregular lesion region in the image of fundus fluorescence angiography was actualized by means of the modified Back Propagation (BP) neural network method. Combining the transfer scaling coefficient between pixel of the image and the actual size, the area of the irregular lesion region was measured. The results may provide valuable data for the clinical diagnosis, treatment and prognostic evaluation.

Chaos and fractals and their applications in electrocardial signal research / 生物医学工程学杂志

Chaos and fractals are ubiquitous phenomena of nature. A system with fractal structure usually behaves chaos. As a complicated nonlinear dynamics system, heart has fractals structure and behaves as chaos. The deeper inherent mechanism of heart can be opened out when the chaos and fractals theory is utilized in the research of the electrical activity of heart. Generally a time series of a system was used for describing the status of the strange attractor of the system. The indices include Poincare plot, fractals dimension, Lyapunov exponent, entropy, scaling exponent, Hurst index and so on. In this article, the basic concepts and the methods of chaos and fractals were introduced firstly. Then the applications of chaos and fractals theories in the study of electrocardial signal were expounded with example of how they are used for ventricular fibrillation.

Research on Nonlinear Characteristic of ECG Signals and Tone of Autonomic Nervous System during Water-immersion Restraint Stress in Rats / 航天医学与医学工程

Objective To definite the status of tone of autonomic nervous system during water immersion process by analyzing the nonlinear characteristic of ECG signals;To explore the relation of approximate entropy(ApEn),scaling exponent(?) changes and modulation function status of autonomic nervous system.Methods The ECG signals of rats during the process of restraint stress(RS),water-immersion restraint stress(WRS) and Vagotomy and Water-immersion restraint stress(vagotomy-WRS) were recorded.The ApEn and ? of RR intervals were calculated.Results After the stress,the differences of the value of ApEn and ? of RR intervals between RS and vagotomy-WRS groups and between different periods in vagotomy-WRS group were not significant.The value of ApEn increased in WRS group and decreased in RS group significantly.Compared with pre-stress,? showed decreased trend,all of the values smaller than 0.5 in WRS group and increased obviously,most values larger than 0.5 in RS group.Conclusion The increased ApEn and decreased ? indicates a higher intensity of parasympathetic activity.The parasympathetic activity is the predominant response of autonomic nervous system during water immersion process.

Comparative analysis of partial imaging performance parameters of home and imported X-ray machines / 中华放射学杂志

Objective To compare and analyze the performance indexes and the imaging quality of the home and imported X-ray machines through testing their partial imaging performance parameters. Methods By separate sampling from 10 home and 10 imported X-ray machines, the parameters including tube current, time of exposure, machine total exposure, and repeatability were tested, and the imaging performance was evaluated according to the national standard. Results All the performance indexes met the standard of GB4505-84. The first sampling tests showed the maximum changing coefficient of imaging performance repeatability of the home X-ray machines was ?max1=0.025,while that of the imported X-ray machine was ?max1=0.016. In the second sampling tests, the maximum changing coefficients of the two were ?max2=0.048 and ?max2=0.022, respectively. Conclusion The 2 years′ follow-up tests indicate that there is no significant difference between the above-mentioned parameters of the elaborately adjusted home X-ray machines and imported ones, but the home X-ray machines are no better than the imported X-ray machines in stability and consistency.

HD7279's application to the analog electrocardiogram generator controlledby a SCM / 医疗卫生装备

This paper introduces the application of H7279intelligent display chip to the selection and display of different kinds of analog electrocardiogram output by the analog electrocardiogram generator controlled by a single chip micyoco(SCM).