Effect of Longdan Xiegantang on Serum Inflammatory Factors, Related Proteins and Immune Function in Patients with Secretory Otitis Media / 中国实验方剂学杂志

Objective: To explore the effect of Longdan Xiegantang on serum inflammatory factors, related proteins and immune function in patients of secretory otitis media (SOM) with liver and gallbladder wetness-heat Syndrome. Method:Totally 76 cases of SOM with liver and gallbladder wetness-heat syndrome admitted to our hospital from July 2017 to May 2018 were randomly divided into two groups, with 38 cases in each group. Control group was treated with triamcinolone acetonide and ambroxol. In addition to the therapy of control group, observation group was also treated with Longdan Xiegantang. Immunoglobulin (Ig) A, IgG, IgM, CD3+, CD4+, CD8+and NK, interleukin-1 beta (IL-1β), IL-5, IL-8, tumor necrosis factor-α (TNF-α), platelet activating factor (PAF), calcitonin (PCT) and water channel protein-1 (AQP-1), AQP-4, fiber link protein (Fn) and soluble interleukin-2 receptor (SIL-2R) levels of two groups were observed before and after treatment. Curative effect and adverse reaction were observed. Result:①Curative effect, after treatment, the total effective rate of observation group was 92.11%, which was higher than 76.32% of control group, with statistically significant differences (Z=2.108, Pα, PAF, PCT, IL-1β and IL-8 in observation group were lower than those in control group after treatment (PPP+, IgA, IgG and IgM of observation group were lower than those of control group (P+, CD4+, CD4+/CD8+ and NK were higher than those of control group (PConclusion:Longdan Xiegantang has a remarkable effect in treating patients of secretory otitis media with liver and gallbladder wetness-heat syndrome, and can restore symptoms, inhibit inflammatory response, activate cell and humeral immune system, reduce the secretion of AQP-1, SIL-2R and other proteins, and increase the secretion of AQP-4 and Fn proteins.

retrospective study on pathological and clinical characteristics of 52 cases with the colorectal serrated polyp

Background and Objective: Colorectal serrated polyp is considered as histologically heterogeneous lesions with malignant potential. The aim of the study was to evaluate the endoscopic, clinic and pathologic characteristics of colorectal serrated polyps

Methods: The endoscopic, clinic and pathologic characteristics of 52 cases with colorectal serrated polyps between January 2014 and May 2018 in our hospital were analyzed. Retrospectively

Results: The prevalence of serrated polyps was 0.39% [52/13,346]. The proportions of hyperplastic polyp [HP], sessile serrated adenoma/polyp [SSA/P], and traditional serrated adenoma [TSA] of all serrated polyps were 61.5%, 17.3%, and 21.2%, respectively, which showed a lower proportion of TSA and SSA/P and a higher proportion of HP

Conclusions: The overall detection rate of colorectal serrated polyps was relatively low, and it is necessary to discriminate between SSAPs and HPs during endoscopic examination because of the malignant potential

Development of LabVIEW-based loading system for cellular shear stress and its experimental validation / 医疗卫生装备

Objective To develop a cellular shear stress loading system with an adjustable stress mode and relevant parameters, and subsequently verify the effectiveness and feasibility of this system. Methods The hardware of the system was developed by using a peristaltic pump and self-designed multi-channel flow chamber, and the mode control program of shear stress based on LabVIEW was designed to control the device via RS485 interfacing and Modbus protocol. Additionally, the relationship between the shear stress and system parameters was calibrated, and finite element analysis was also conducted. Finally, the feasibility of the system was confirmed via the in vitro cell experiment. Results The mode and magnitude of shear stress of the system could be controlled via either the peristaltic pump or computer, and the cellular long-term effect was also able to be detected. The calibration results of the system indicated that the level of shear stress exhibited significantly linear positive correlation with the revolution of the peristaltic pump (P<0.001). Finite element analysis demonstrated that the level of shear stress on the slide was uniformly distributed and the result of simulation was accordant with calibration. Cytoskeleton staining suggested that cellular morphology of MLO-Y4 cells was changed, and microfilament increased and arrayed along fluid flow direction. Conclusion The system is stable and reliable enough to provide different loading modes and magnitude of cellular shear stress to offer a convictive platform of the research for different cellular stress signal transduction mecha-nisms.

Design of test phantom for MRI clinical quality control / 医疗卫生装备

Objective To design a test phantom for clinical routine quality control of magnetic resonance imaging (MRI).Methods The commonly used phantom such as Magphan SMR170 and Victoreen 76-903 were used for experiments with the same parameters,and the test data of all the modules were compared.The advantages and disadvantages of all the modules were analyzed,and an optimization scheme was proposed accordingly.Results The phantom could be applied to the detection of high-image-quality MRI machine,and solved the problems in positioning,size matching and etc.Conclusion The new phantom meets the demand of magnetic resonance imaging clinical routine testing,and provides a certain reference for phantom optimization design.

Development of new loading device for establishment of stress fracture animal models / 医疗卫生装备

Objective To develop a novel stress fracture animal model system based on dynamic cyclic mechanical loading.Methods Ulnae and tibiae of rats were respectively fixed using differently shaped fixtures (including a fixed holder and a movable holder).The axial mechanical loading was applied via a linear actuator based on LabVIEW control program.During the loading process,a load cell and a laser displacement transducer were used to detect the force and displacement changes in the limbs,respectively.The two signals were sampled at real time by PC-based LabVIEW data acquisition program.A compressive loading test (peak force of 50 N) was conducted to examine the consistency and reliability of cyclic loads after completing the loading system.The loading system and an ElectroForce 3220 mechanical testing machine were respectively used to measure and compare the Young's modulus of a standard ultra-high molecular weight polyethylene (UHMWPE)cylinder to calibrate the loading system.Results The compressive loading test (peak force of 50 N) demonstrated that the mechanical loading system was able to apply consistent loads with controllable intensity and time.The calibration experiment indicated the accuracy of the loading system.Conclusion The novel mechanical loading device has characteristics of precision,scientificity and reliability,and it is approaching the real development situation of stress fracture,which may provide a reliable experimental base for exploring the precautionary measures of stress fracture.

Development and experimental test of ribbed, oxygen-enriched and inflatable tent / 医疗卫生装备

Objective To develop a ribbed,oxygen-enriched and inflatable tent to fulfill the requirements for mobile enriched oxygen supply under plateau conditions.Methods The tent was developed with ribbed skeleton,PVC material,nested structure,buffer door,channel for fresh air dispersion,exhaust recovery pipeline and etc,and the self-developed plateau oxygen enrichers were involved in to establish a mobile oxygen-enriched room.The enrichers were divided into four grades of 20,50,70 and 100 m3/h,which were used to execute 8-h oxygen-enriched fresh air dispersion in the tent.The change curves of the fractions for oxygen and carbon dioxide were compared and analyzed at 5 disperse points in the tent.Results Optimal effect was acquired with 20 m3/h oxygen enricher,the oxygen concentration reached 27％ in the tent after 8-h dispersion,while the carbon dioxide fraction was 1 800 ppm (1 ppm=l×l0-6) and it took 3-h to raise oxygen concentration to 25％.Conclusion The tent combined with 20 m3/h oxygen enricher decreases the equivalent altitude from 5 000 m to less than 3 000 m,and is hopeful to be spreaded in the plateau troops after improvement.

Undergraduate thesis project in major of biomedical engineering / 医疗卫生装备

The factors for the undergraduate thesis design in biomedical engineering specialty were analyzed from the as-pects of tutor, student and administration, and some suggestions were proposed accordingly to enhance the undergraduate thesis design in biomedical engineering specialty.

Investigating the teaching methodology of English for science and technology in the major of biomedical engineering / 中华医学教育探索杂志

English for science and technology (EST) is the language medium for academic communication among scientists and technologists. The expression of EST is characterized by concise-ness, correctness, objectiveness and understandability. The EST course is regarded as a key process for the undergraduate students to reinforce the English foundation and improve the capacity of English application after their College English study. In this paper, the authors introduced an interest-motivated, output-dominated, snowballing and interactive teaching strategy, according to the accumulated experi-ence of EST teaching in the past few years coupled with the unique medicine-engineering combined characteristics for the major of biomedical engineering.

Progress on association between autophagy and cancer / 浙江大学学报·医学版

Autophagy is an evolutionarily well conserved cellular catabolic process.Cellular proteins and organelles are engulfed to autophagosomes and eventually delivered to lysosomes for degradation. Autophagy is closely associated with a variety of human diseases especially cancer. At present, it has been widely accepted that autophagy is a "double-edged sword" in cancer: it blocks tumorigenesis at the early stage, while it facilitates tumor development at the promotion and progression stage. Moreover, autophagy can be induced by chemotherapy and radiotherapy, which is generally play a pro-survival function. Thus, autophagy is an important target for cancer therapy, and suppression of autophagy to enhance the efficacy of cancer therapeutic agents is a novel strategy in cancer therapy under active clinical trials.

Preparation of a glypican-3-targeting hepatocellular carcinoma MR probe and its molecular imaging in HepG2 cells / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To prepare a glypican-3 (GPC3)-targeting hepatocellular carcinoma MR molecular probe and to evaluate its targeting specificity using HepG2 cells.</p><p><b>METHODS</b>Poly(lactic-co-glycolic acid) (PLGA) nanoparticles were prepared by a double emulsion solvent evaporation method, and the surfaces were connected with anti-GPC3 mono-antibody and paramagnetic substance Gd3+. The physical properties of the probes were investigated using fluorescence microscopy, electron microscopy, Malvern particle size analysis, inductively coupled plasma atomic emission spectroscopy (ICP-AES) and 1.5T MR imaging. The specificity of the probes to target cultured HepG2 cells was determined by laser confocal microscopy. The signal characteristics, including signal-to-noise ratio (SNR), after co-incubation with HepG2 cells were analyzed by 1.5T MR imaging. Significance of differences between multiple groups (target group, non-target group, and control group) was assessed by one-way analysis of variance, and between two groups was assessed by the LSD-t test. A difference was considered to be statistically significant at P less than 0.05.</p><p><b>RESULTS</b>The GPC3-targeting hepatocellular carcinoma MR molecular probes were successfully prepared. The nanoparticles had a spherical shape, size of 495 +/- 17.5 nm, uniform size distribution, good dispersibility, no obvious aggregation, and could significantly increase the T1 signal. Using the ICP-AES measurement, 1 mol PLGA carried about 12 mol Gd3+, and as the Gd3+ concentration increased, the T1 signal increased. The prepared MR molecular probes could specifically target HepG2 cells, and could increase the T1 signal. The SNR value of the target group was 3.45 +/- 0.21, of the non-target group was 1.43 +/- 0.07, and of the control group was 1.12 +/- 0.03. The SNR value of the target group was significantly higher than that of the non-target group and the control group (P less than 0.05); there was no significant difference between the non-target group and the control group (P more than 0.05).</p><p><b>CONCLUSION</b>PLGA nanoparticles, anti-GPC3 mono-antibody and paramagnetic Gd3+ can be used to successfully prepare GPC3-targeting hepatocellular carcinoma MR molecular probes which are capable of specifically targeting HepG2 cells in vitro and being detected by 1.5T MR imaging. These MR molecular probes may represent a useful noninvasive imaging method for detecting early hepatocellular carcinoma in vivo.</p>

Effect of Achyranthes bidentata polysaccharides stimulated dendritic cells co-cultured with cytokine induced killer cells against SW480 cells / 中国中药杂志

Achyranthes bidentata polysaccharides (ABPS) was extracted from the root of A. bidentata. Dendritic cells (DC), which were stimulated with ABPS and/or tumor antigen SW480, were co-cultured with cytokine induced killer cells (CIK) to test the cytotoxic effect on colon cancer cell line SW480. Peripheral blood mononuclear cells (PBMNCs) which were separated from human peripheral blood were cultured to DC and CIK separately. (1) DC were divided into four groups: pure DC served as control group; ABPS (50 mg x L(-1)) stimulated DC served as experimental group; SW480 tumor antigen stimulated DC served as the second experimental group; ABPS (50 mg x L(-1)) and SW480 tumor antigen co-stimulated DC served as the third experimental group. Flow cytometry was used to detect the difference of the positive rate of molecules in the cell surface of DC, include CD80, CD86, CD1c, CD40, HLA-DR (6 samples for each group). (2) The four DC groups were mixed with CIK at the ratio 1:5 and acted as effect cells (DC + CIK groups), and the colon cancer cell line SW480 acted as target cells. The effect cells and the target cells were mixed together at the ratio 30: 1, 20:1 and 10:1 separately, and the CCK-8 kit was used to test the cytotoxic effect on colon cancer cell line SW480. (3) At the mixing ratio 30:1 of effect cells and target cells, ELISA was used to test the level of cytokines secretion, including IL-2, IL-12p70, IL-17 and TNF-alpha, in the liquid supernatant of every test group (3 duplication per sample). The results showed as following: (1) The positive rates of CD80, CD11c, HLA-DR, in the cell surface of DC which was co-stimulated by ABPS (50 mg x L(-1)) and SW480 tumor antigen, were obviously higher than the other DC groups (P < 0.05), and the positive rates of CD86, CD40 were obviously higher than the pure DC group (P < 0.05), and there was no remarkable difference with the other two DC groups. (2) At the mixing ratio 30:1, 20:1 and 10:1 of the effect cells and the target cells, the cytotoxic effect of ABPS stimulated DC + CIK group and SW480 tumor antigen stimulated DC + CIK group was obviously higher than DC + CIK group (P < 0.05), the cytotoxic effect of ABPS and SW480 tumor antigen co-stimulated DC + CIK group was obviously higher than all the other groups. (3) At the mixing ratio 30:1 of the effect cells and the target cells, the secretion levels of IL-12p70 and TNF-alpha in the liquid supernatant of the ABPS and SW480 tumor antigen co-stimulated DC + CIK group were obviously higher than all the other groups (P < 0.05), the secretion levels of IL-2 and IL-17 in the liquid supernatant of every test group have no remarkable difference. The cytotoxic effect of ABPS stimulated DC + CIK on SW480 was obviously increased. The cytotoxic effect of ABPS and SW480 tumor antigen co-stimulated DC + CIK group was obviously higher than all the other.

Preparation and in vitro study of a high molecular weight contrast agent targeting hepatoma cells / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To prepare a specific high molecular weight polymer contrast agent capable of specifically targeting hepatocarcinoma cells (HCC) and to investigate its affinity in vitro using HepG2 cells.</p><p><b>METHODS</b>The high molecular weight polymer polylactic-co-glycolic acid (PLAG)-COOH was prepared by the double emulsion technique. PLAG-COOH microbubbles were combined with glypican-3 (GPC3) antibody to generate HCC targeting high molecular polymer ultrasound contrast agents by the carbodiimide method. The affinity for HCC cells was confirmed by measuring attachment to cultured HepG2 cells by flow cytometry and comparing the results with the properties observed for non-targeted high molecular weight polymer ultrasound contrast agents.</p><p><b>RESULTS</b>The average diameter of the targeted high molecular weight polymer ultrasound contrast agents was (800+/-10) nm. In vitro targeting of HepG2 cells showed that many of the targeted high molecular weight polymer ultrasound contrast agents attached tightly to the cell surface and that the GPC3-PLGA has a particularly strong targeting ability.</p><p><b>CONCLUSION</b>A HCC-specific high molecular contrast agent, GPC3-PLGA, was synthesized and evidenced a strong targeting ability towards HepG2 cells in vitro. This new agent may be exploited to improve diagnosis of liver cancer at the molecular level.</p>

Preventive effect of IL-18 gene modified mature dendritic cells vaccine on airway inflammation in mouse asthma model / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the preventive effect of interleukin-18 (IL-18) gene modified mature dendritic cells (mDC) vaccine on airway inflammation in mouse asthma model.</p><p><b>METHODS</b>The asthma model was induced by injection of ovalbumin (OVA) in BALB/c mice. IL-18 gene modified mouse mature dendritic cells (mDC) were detected by flow cytometry and its capacity of inducing allogeneic T cell responses was examined by mixed lymphocyte reaction (MLR). The OVA-induced asthmatic mice were randomly divided into 6 groups: PBS group, DXM group, mDC group, Ad-LacZ-mDC group, Ad-IL-18-mDC group and control group. The pathological changes in lung tissues were assayed by HE and AB-PAS staining. The numbers of inflammatory cells and percentage of eosinophils (EOS) in bronchoalveolar lavage fluid (BALF) were counted. The levels of IFN-γ IL-4 and IL-13 in culture supernatant of splenocytes were measured by ELISA method. The percentage of CD4(+)CD25(+)Foxp3(+) Treg was assessed by flow cytometry analysis.</p><p><b>RESULT</b>The vaccine was effective in decreasing the infiltration of EOS and accumulation of airway goblet cells in lung tissues, the numbers of inflammatory cells and percentage of EOS in BALF, and the levels of IL-4 and IL-13 in culture supernatant of splenocytes, and in increasing the levels of IFN-γ in culture supernatant of splenocytes and the percentage of CD4(+)CD25(+)foxP3(+) reg.</p><p><b>CONCLUSION</b>IL-18 gene modified mDC vaccine has a preventive effect on airway inflammation in OVA-induced asthmatic mice.</p>

1H magnetic resonance spectroscopy in the evaluation of high intensity focused ultrasound ablation for primary liver cancer / 中华肝脏病杂志

To investigate the clinical value of 1H magnetic resonance spectroscopy (1H MRS) in the evaluation of high intensity focused ultrasound (HIFU) ablation for primary liver cancer. Routine magnetic resonance sequences, contrast-enhanced magnetic resonance imaging and respiratory-triggered single voxel point resolved spectroscopy sequence (PRESS) were performed on 24 patients with primary liver cancer before and after HIFU ablation. A respiratory-triggered axial T2 weighted imaging (T2WI) was used as localizer for PRESS. Spectroscopy data was transmitted to a personal computer and was post-processed with a custom software (Saker, provided by Ning Jing, an engineer in GE Healthcare). It would be considered "technical success" if the baselines of spectra were stable and main metabolites were without overlapping and could be identified. Integral areas of choline (Cho) peak at 3.2 parts per million (ppm) and lipid (Lip) peak at 1.3 ppm were measured, and the choline to lipid (Cho/Lip) ratios were calculated. The differences of areas of Cho, Lip peak and Cho/Lip ratios before and after HIFU ablation were compared by using paired samples t test, and a P value of less than 0.05 was considered statistically significant. The technical success rate of 1H-MRS was 87.50% (42/48). Integral areas of Cho peak and Lip peak of 20 patients with satisfied spectra were measured, and the Cho/Lip ratios were calculated. The Integral area of Cho peak decreased from 34 597+/-6 802 before HIFU ablation to 6 372+/-2 466 after HIFU ablation (t = 18.02, P less than 0.01). The Integral area of Lip peak increased from 147 948+/-16 317 before HIFU ablation to 149 069+/-16 345 after HIFU ablation (t = -15.11, P less than 0.01). The Cho/Lip ratio decreased from 0.23+/-0.03 before HIFU ablation to 0.04+/-0.02 after HIFU ablation (t = 25.32, P less than 0.01). 1H-MRS could provide information of metabolites changes of primary liver cancer after HIFU ablation and could be used as a complementary sequence to other magnetic resonance sequences to evaluate all around primary liver cancer after HIFU ablation.

Promoting effect on NK cells induced by myeloid-derived suppressor cells in acute fulminate hepatitis of mice / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the interaction between myeloid-derived suppressor cells (MDSCs) and nature killer cells during acute fulminate hepatitis.</p><p><b>METHODS</b>Acute fulminate hepatitis were induced by i.p. co-injection of LPS and D-GalN in mice, and the ratio of MDSCs,NK cells and the activation of NK cells in different tissues were analyzed by FACS at 0 h,1.5 h,3 h and 6 h.</p><p><b>RESULTS</b>The percentage of MDSCs and NKG2D+NK cells in different tissues increased as acute fulminate hepatitis progressed, with the increased NK cells in liver tissue. The mean fluorescence intensity of NKG2D on NK cells in different tissues were also enhanced.</p><p><b>CONCLUSION</b>MDSCs induce the proliferation and activation of NK cells in mice with acute fulminate hepatitis.</p>

CT image of liver secondary lymphoma / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To analyze the CT image characteristics of liver secondary lymphoma.</p><p><b>METHODS</b>The medical records of 13 patients were reviewed. There were 12 non-Hodgkin lymphoma cases and 1 Hodgkin lymphoma case. Abdomen CT scan was performed in all cases, plain scan and enhanced CT scan were performed in 11 cases, plain CT scan was performed in 2 cases.</p><p><b>RESULTS</b>Of the 13 cases, 11 were nodular type, 1 was diffuse type, and 1 was mixed type. Plain CT scan showed low density, enhanced CT showed circular enhancement in 1 case, mild to midrange delayed enhancement in 1 case, midrange enhancement in 1 case, mild enhancement in 2 cases, blood vessel floating sign in 3 cases, no enhancement in 6 cases.</p><p><b>CONCLUSIONS</b>The characteristics of liver secondary lymphoma CT image of liver secondary lymphoma includes blood vessel floating sign and enhancement.</p>

Effect of gushen pelyuan recipe on Bcl-2 and Bax mRNA expressions in cochlea tissue of rats with Shen-yang deficiency syndrome / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the effect of Gushen Peiyuan Recipe (GPR) on the expression of Bcl-2 and Bax mRNA in Shen-yang-deficiency (SYD) rats suffering from cochlea apoptosis, thus providing a theoretical basis to the treatment and prevention of sensorineural hearing loss and fill Chinese medine's theory of kidney-ear-correlation with new substance.</p><p><b>METHODS</b>Rats were induced into experimental SYD animal models by injecting cetacort into their buttocks. Rats in the blank and model groups were given 10 mL/kg normal saline by gastrogavage, and 31 g/kg, 15.5 g/kg and 7.5 g/kg GPR were given to the rats in the high, medium and low dose groups by gastrogavage respectively. RT-PCR was adopted to detect the mRNA expressions of Bcl-2 and Bax.</p><p><b>RESULTS</b>Levels of Bcl-2 mRNA expression and Bcl-2/Bax enhanced, and mRNA expression of Bax attenuated in the model rats after GPR treatment, the Bcl-2/Bax ratio increased, showing insignificant difference when compared with the blank control group (P > 0.05).</p><p><b>CONCLUSION</b>GPR plays a significant role in regulating the mRNA expressions of Bcl-2 and Bax, therefore improving the hearing of SYD rats and protecting the structure and function of cochlea.</p>

Preparation of anticolon carcinoma vaccine with rich chaperone peptides and study on its anticancer efficacy / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To prepare the anticolon carcinoma vaccine with rich chaperone peptide and to examine its anticancer immunological efficacy.</p><p><b>METHODS</b>CT26 colon carcinoma cells were cultured in 1 mg/L Trichosanthin 1640 medium at different temperatures to induce the chaperone expression and promote the synthesis of antigen peptides. Groups of these cells treated under the different condition were lysed by the sonic disintegration, and the lysates were centrifuged. The rawpurified proteins were obtained from the supernatants by precipitating with saturated ammonium sulfate and removing the molecules below 50,000 and above 300,000 in molecular weight via dialysis. Furthermore, the proteins with the molecular weights in 70,000, 90,000, 95,000, 110,000 and 170,000 were collected through gel filtration and SDS-PAGE. The purified proteins were analysed by Western blotting, and inspected on the anticancer immunological effects including lymphocyte proliferation and the activities of NK and CTL.</p><p><b>RESULTS</b>Major of the chaperone peptides of anticancer effects in CT26 cells, including antigen peptides joining with HSP70, HSP90, gp96, HSP110 and HSP170, was satisfactorily extracted and condensed, and rich chaperone peptide composites were successfully obtained. The composites prepared under various condition could all enhance lymphocyte proliferation and the activities of CTL and NK(P<0.01).</p><p><b>CONCLUSIONS</b>The rich chaperone peptide composites are successfully prepared via dialysis, salt fractionation and gel filtration combined with SDS-PAGE. Both the heat stress and Trichosanthin can increase the composites, which treated by 42 centi-degree heat stress and Trichosanthin are found to possess the strongest anticancer efficacy.</p>

Effect of macrocalyxin A on HL-60 cells proliferation, differentiation and apoptosis / 中华血液学杂志

<p><b>OBJECTIVE</b>To study the effect of macrocalyxin A (MA) on proliferation, differentiation and apoptosis in HL-60 cells and explore its possible mechanisms.</p><p><b>METHODS</b>Different concentration of MA were used to treat HL-60 cells. Proliferation inhibition was analyzed by Trypan blue staining and MTT assay, cell apoptosis by cell morphology, DNA content, cell cycle analysis, Annexin-V/PI and Hoechst 33258 fluorescence staining. The differentiation of HL-60 cells was evaluated by cell morphology, NBT tests and expression of CD11b, CD13, CD14. The expressions of bcl-2, bax, Fas, P53, mitochondrial transmembrane-potential (DeltaPsim) and mitochondrial membrane protein were analyzed by flow cytometry.</p><p><b>RESULTS</b>MA could inhibit HL-60 cells proliferation capacity in a time-and dose-effect, with a 24 h IC50 value of 8.76 microg/ml, 48 h of 7.17 microg/ml and 72 h of 7.14 microg/ml. The HL-60 cells apoptosis was confirmed by cell morphology, sub-G1 phase and Annexin-V/PI labeling in a time and dose dependent manner. The more mature HL-60 cells were a with higher positivity of NBT and expressions of CD11b than those cultured without MA. The expression of bax was increased, while bcl-2, P53, Fas were unchanged on the MA treatment. MA could increase the expression of mitochondrial membrane protein in a dose-dependent manner while the DeltaPsim was reduced.</p><p><b>CONCLUSION</b>MA can inhibit proliferation and induce differentiation and apoptosis of the HL-60 cells. The mechanism may be related with up-regulating bax, opening the mitochondrial permeability transition pore and reducing DeltaPsim.</p>

The application of 3D liver acquisition volume acceleration integrated with array spatial sensitivity encoding technique in liver dynamic-enhancement scanning / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To evaluate the application of 3D liver acquisition volume acceleration (3D-LAVA) integrated with array spatial sensitivity encoding technique (ASSET) in liver dynamic-enhancement scanning.</p><p><b>METHODS</b>One hundred forty-seven patients underwent conventional plain and contrast enhancement liver MR imaging. 3D-LAVA and 2D fast spoiled gradient recalled echo were used for contrast enhancement liver MR scanning in 90 and 57 patients respectively. In the 3D-LAVA group, integrated ASSET was used in 72 out of the 90 patients. Of the 57 patients who underwent examinations using 2D fast spoiled gradient recalled echo, portal vein CE-MRA was performed on 20. The ability of 3D-LAVA to detect the lesions and the advantage to shorten the acquisition time after integrating with ASSET were analyzed. Original images of 60 patients in the 3D-LAVA group were processed using MIP to illustrate the anatomy of the portal vein. They were compared with those shown by CE-MRA to evaluate the illustration abilities of the two approaches.</p><p><b>RESULTS</b>3D-LAVA is more sensitive than 2D-FSPGR in detecting metastatic hepatic carcinomas. In the 3D-LAVA group integrated with ASSET, earlier and peak arterial phase images were acquired in 34 cases; and earlier, peak and late arterial phase images were acquired in 23 cases. The illustrations of the portal vein anatomy by 3D-LAVA were similar to those shown by portal vein CE-MRA.</p><p><b>CONCLUSION</b>3D-LAVA integrated with ASSET can obtain higher quality multi-phase dynamic enhancement images of the liver in a shorter time, and in the meantime also shows the vascular anatomy.</p>