Treatment experience of neck tumor surgeries involving carotid artery / 临床耳鼻咽喉头颈外科杂志

Objective:To investigate surgical treatment of carotid artery diseases in neck tumor surgery. Methods:A retrospective analysis of the clinical data on carotid artery treatment was conducted in the five cases of neck tumor surgeries treated at Department of Surgical Oncology, the First Peoples Hospital of Lanzhou from March 2010 to May 2020. Surgical methods, including carotid artery resection and ligation, tumor-involved artery resection and vascular reconstruction, and tumor peeling and carotid rupture repairing were used, respectively. Results:Five cases were successfully operated on. One case of carotid artery ligation was followed by intermittent dizziness and decreased contra-lateral limb strength after the surgery. The remaining patients exhibited no neurological complications. A patient with cervical low-grade myofibroblastoma developed into lung metastases 8 months after the surgery. Another patient with cervical lymph node metastases in papillary thyroid cancer developed into lung metastases 24 months after the surgery. Conclusion:Currently, surgical methods for clinical treatment of diseased carotid arteries include carotid artery resection and ligation, simple tumor peeling, tumor invasion artery resection and vascular reconstruction, and interventional therapy. Each surgical method has its own advantages and disadvantages. Therefore, the choice of treatment depends on the patient's specific conditions, physician's clinical experience, and the equipment available.

The creation and application of entity teaching model of medical physics—taking hemodynamics as example / 中华医学教育探索杂志

Hemodynamics is a branch of fluid mechanics, which mainly studies the physiological process of circulatory system from the perspective of mechanics, and has a wide range of applications in medicine. The entity teaching model is made to help medical students master the knowledge of hemodynamics more easily and intuitively by showing them the phenomenon of laminar flow, turbulence and axial concentration of red blood cells. And then we check their learning effect by questionnaires. Students are interested in the entity teaching model that the teacher has used in the class. Thus, the entity teaching model can play an important role in the teaching process.

Enhancing hRANKL production in Escherichia coli by optimizing culture conditions and lysing program / 生物工程学报

RANKL/RANK/OPG axis is important in bone metabolism regulation, and becomes a popular research area in bone diseases. RANKL is a critical part of RANKL/RANK/OPG axis, and widely required in bone metabolism research. However, the yield of recombinant soluble human RANKL (hRANKL) in Escherichia coli is much lower than mouse RANKL (mRANKL). In this study, by adjusting and stabilizing the pH value of LB medium at 7.5, lowering the inducing temperature to 16 ℃ and optimizing the lysis program, the yield of soluble hRANKL increased by approximately 5 to 12-fold over the non-adjusted group. Our experiment effectively enhanced soluble hRANKL expression in E. coli and might constitute a meaningful attempt to obtain soluble expression of recombinant protein in E. coli.

Synthesis and antifungal activity of the novel azole compounds / 药学实践杂志

Objective To design and synthesize novel triazole antifungal derivatives with 1 ,3 ,4-oxadiazole side chain for the study of antifungal activities. Methods Fourteen title compounds were synthesized via acylation ,aminolysis reaction ,cy-clization ,nucleophilic substitution ,etc. All the compounds were characterized by 1 H NMR ,MS spectra. The in vitro antifun-gal activities were evaluated against six human pathogenic fungi through the micro-broth dilution method. Results The title compounds exhibited strong antifungal activities against all the tested fungi ,especially against Candida albicans. Compounds 10d ,10i , 10l , and 10n were found to be the most effective , with a minimum inhibitory concentration (MIC80 ) of 0.003 9 μg/ml .They are 16-fold more potent than ICZ ( MIC80 0.062 5 μg/ml) and 64-fold more potent than FCZ (MIC80 0.25 μg/ml) .Conclusion The 1 ,3 ,4-oxadiazole side chain could affect the antifungal activities. That could be due to the prop-er incorporation between the 1 ,3 ,4-oxadiazole substituted phenyl ring with the target enzyme.

Construction and verification of NF-κB luciferase reporter gene system / 生物工程学报

To quantify the transcriptional activity of NF-κB and to screen drugs related to the regulation of NF-κB activation, we constructed a recombinant plasmid through deleting the original CMV promoter of retrovirus vector pQCXIP and inserting the NF-κB enhancer and NanoLuc luciferase sequence into the vector. Then, using the recombinant plasmid we constructed a cell line in which the expression of NanoLuc luciferase (NLuc) was regulated by NF-κB. The inserted sequences were verified by restriction endonuclease digestion and sequencing. Tumor necrosis factor-α (TNF-α), an NF-κB activator, acted on the constructed NLuc cell line and leaded to the specific luciferase reaction. The luciferase reaction showed a fine time and dose dependence to the TNF-α stimulation, indicating the successful construction of the NF-κB regulated NLuc-expressing cell line. Besides, the NF-κB inhibitor, triptolide, reduced the expression of NLuc in a dose-dependent way. The constructed reporter system in this study could be applied in the quantification of the NF-κB transcriptional activity and in the NF-κB regulation-related drug screening.

Intensity modulated radiation therapy for primary liver cancer with portal vein/inferi-or vena cava tumor thrombosis / 中国肿瘤临床

Objective:To evaluate the clinical outcomes of patients after intensity modulated radiation therapy (IMRT) for hepatocellu-lar carcinoma (HCC) with portal vein tumor thrombosis (PVTT) or inferior vena cava tumor thrombosis (IVTT). Methods:A registry data-base of 41 patients treated with IMRT for HCC with PVTT or IVTT in Radiotherapy Center of No.3 Hospital of Beijing Chinese People Armed Police Forces between January 2013 and May 2015 were analyzed retrospectively. The biological effective dose of radiation was ranged 48-94Gy. Short-term effects and prospective efficacy were observed. Log-rank test, Cox regression were used for survival analysis and prognostic factor identification. Results: Grade 2 or higher level gastrointestinal reaction was observed in 12 patients (29.3%). Hematological toxicity was observed in 11 patients (26.8%), and radiation-induced liver disease was observed in 6 patients (14.6%). We found that 29.3%of patients achieved a complete response and 31.7%of patients achieved a partial response. The stable and progressive disease rates were 39.0%and 0.0%, respectively. Median patient survival was 11 months, and the 1-year survival rate was 34.1%. The significant independent variables associated with the overall survival included Child-Pugh grade, AFP test, and CHE lev-el. Conclusion:IMRT is a safe and effective treatment for PVTT or IVTT in patients with HCC.

Study on compatibility of traditional Chinese medicine active constituents with antioxidant activity / 中国中药杂志

<p><b>OBJECTIVE</b>To find a research method suitable to multi-component multi-index composition-activity relationship of traditional Chinese medicines (TCMs) with the antioxidant activity of four compatible active constituents of TCMs as the subject.</p><p><b>METHOD</b>LARS-based regression algorithm and comprehensive weight coefficient method were adopted to study in vitro clearance of DPPH and polyaromatic hydrocarbon with different doses of four compatible active constituents--total flavonoids of Glycyrrhizae Radix et Rhizoma (TFG), Ginkgo Folium extract (GBE), total flavonoids of Epimedii Folium (TFE) and astragaloside (AST) according to the comprehensive efficacy assessment procedures, that is test design, efficacy test and mathematical modeling (model verification).</p><p><b>RESULT</b>LARS and comprehensive weight coefficient method was adopted to assess the optimal comprehensive efficacy of clearing DPPH and polyaromatic hydrocarbon. The results showed that the optimal dose combination of compatible constituents is TFG-GBE-TFE-AST 1: 0.2545: 0.007 6:0.011 5.</p><p><b>CONCLUSION</b>The above compatibility of TCMs constituents can effectively clear polyaromatic hydrocarbon and DPPH with a good antioxidation. The uniform design adopted in this experiment, in combination of synthetic weight method, is suitable to the data analysis of "non-linear and small-sample" biotic experiment and the study on screening and assessment of compatibility of TCMs constituents.</p>

Research of herb components on scavenging harmful components and reducing cytotoxicity of cigarette smoke / 中国中药杂志

<p><b>OBJECTIVE</b>To study the in vitro effect of herb components on scavenging harmful components of cigarette smoke such as radicals, polycyclic aromatic hydrocarbons, nitrosamines in vitro, and its reducing effect on cytotoxicity of cigarette smoke.</p><p><b>METHOD</b>spectrophotometry was used to examine the scavenging effect of herb components on DPPH free radicals, superoxide anion radical, and hydroxyl radical, and the results were compared with the anti-oxidation of ascorbic acid. Fluorescence spectroscopy was used to examine the scavenging effect of herb components on polycyclic aromatic hydrocarbons. UV spectrophotometry was used to examine the scavenging effect of herb components on volatile nitrosamines. MTT assay was used to examine cytotoxicity of cigarette smoke.</p><p><b>RESULT</b>All the herb components showed a certain scavenging effect on DPPH free radicals, superoxide anion radical, hydroxyl radical, polycyclic aromatic hydrocarbons and volatile nitrosamines, espacially the ginkgo biloba extract (GBE), flavonoids of glycyrrhiza, procyanidine, total saponins in ophiopogonin, total saponins of astragalus and epimediun flavonoids. After these six herb components were added to cigarette, the cytotoxicity of cigarette smoke on BEP2D cells was remarkably reduced, by increasing cell survival fraction (SF, %) and mean lethal dose (DML).</p><p><b>CONCLUSION</b>The herb components can scavenge harmful components of cigarette smoke such as radicals, polycyclic aromatic hydrocarbons and nitrosamines, which reduce the damage of cigarette smoke on human being.</p>

Premliminary study of NK-4 inhibition on proliferation of colon cancer cells / 中国普通外科杂志

Objective To investigate the influence of selective HGF/cMet inhibitor-NK-4 against colon(cancer) and reveal the potential signaling pathway mechanism of NK-4 effect on colon cancer cell.Methods LoVo colon cancer cells were treated with NK-4(a selective inhibitor of c-Met phosphorylation)at different times.MTT assay and flow cytometry were used to measure cell proliferation and apoptosis.The expression of c-Met,p-c-Met,MEK2,p-ERK and C-myc were measured by Western blot.Results In NK-4-treated group, cells proliferation were inhibited and apoptosis induced in a dose-dependent manner,and resulted in(significant) downregulation of p-c-Met and MEK2/ERK pathway-related protein.The effect of HGF/on LoVo was the opposite.The ratios of p-c-Met,MEK2,p-ERK and C-myc expression between blank group and the NK-4(1?g/mL)-treated for 24h group were 2.58,1.89,1.67 and 2.21(P