Establishment of epigenetic markers to predict irradiation efficacy against oropharyngeal cancer

Irradiation, or chemoradiotherapy, is a curative treatment for oropharyngeal squamous cell carcinoma (OPSCC). Its invasiveness, however, can often negate its efficacy. Therefore, developing methods to predict which patients would benefit from irradiation is urgent. Promoter DNA hypermethylation was recently reported to correlate with favorable OPSCC prognosis. It is still unclear, however, whether there is an association between promoter DNA methylation and response to irradiation. In this study, we analyzed DNA methylation in the specimens from 40 OPSCC patients who had undergone irradiation, using the Infinium assay. Our results showed significant correlation between high levels of promoter DNA methylation and better response to treatment (P < 0.01). We used the 10 most differentially‐methylated genes between responders and non–responders to develop a panel of predictive markers for efficacy. Our panel had high sensitivity, specificity and accuracy (92%, 93% and 93%, respectively). We conducted pyrosequencing to quantitatively validate the methylation levels of 8 of the 10 marker genes (ROBO1, ULK4P3, MYOD1, LBX1, CACNA1A, IRX4, DPYSL3 and ELAVL2) obtained by Infinium. The validation by pyrosequencing showed that these 8 genes had a high prediction performance for the training set of 40 specimens and for a validation set of 35 OPSCC specimens, showing 96% sensitivity, 89% specificity and 94% accuracy. Methylation of these markers correlated significantly with better progression‐free and overall survival rates, regardless of human papillomavirus status. These results indicate that increased DNA methylation is associated with better responses to irradiation therapy and that DNA methylation can help establish efficacy prediction markers in OPSCC.     

剔络养血明目方对青光眼患者视功能改善的疗效分析及对视神经血流密度的影响

目的:探讨剔络养血明目方对青光眼患者最佳矫正视力(the best corrected visual acuity,BCVA),视野等改善的作用,分析该方剂对视神经血流密度(vessel density,VD)和视网膜神经纤维层厚度(retinal nerve fiber layer thickness,RNFL thickness)的影响。方法:回顾分析2017年1月至2020年7月采用剔络养血明目方治疗的117例原发性青光眼患者共计234只眼的临床数据;回顾剔络养血明目方治疗的57只眼作为治疗组,另选取性别、年龄、疗程相匹配的未行该方治疗的57只眼作为对照组。分析治疗前后BCVA,视野平均敏感度(value and mean sensitivity,MS),平均缺损(mean deviation,MD)的变化。利用光学相干断层扫描血管成像技术(optical coherence tomography angiography,OCTA)分析治疗前后视神经VD及RNFL厚度的变化。结果:治疗后较治疗前BCVA提升(P=0),MS值增加(P=0),MD值减小(P=0.001),整个视盘扫描区域(P=0),视盘内(P=0.004)及盘周各分区(P0.05)的VD增加,RNFL厚度(除视盘下方鼻侧区外)无明显变化。治疗组治疗后较治疗前,MS增加(P=0.003),MD减少(P=0.024),对照组视野各指标治疗后较治疗前变化无统计学差异。结论:对于眼压稳定在目标眼压范围内的青光眼患者,剔络养血明目方能够改善其视功能和视神经VD,但对RNFL厚度无明显影响。     

阿帕替尼联合曲妥珠单抗对胃癌细胞的协同增敏作用

目的观察阿帕替尼联合曲妥珠单抗杀伤胃癌NCI-N87细胞的协同增敏作用并探讨可能作用机制。方法CCK-8法检测空白对照组、曲妥珠单抗组(0.1、1、10μg/ml)、阿帕替尼组(1μmol/L)及曲妥珠单抗(0.1、1、10μg/ml)+阿帕替尼(1μmol/L)组对NCI-N87细胞的增殖抑制作用,流式细胞术检测NCI-N87细胞凋亡,Western blotting检测HER-2、VEGFR2、Bax、Bcl-2蛋白表达。结果CCK-8检测提示曲妥珠单抗、阿帕替尼能够抑制NCI-N87细胞增殖,在一定浓度范围内作用呈浓度依赖性和时间依赖性(P<0.01);q值计算提示曲妥珠单抗与阿帕替尼具有协同抑制NCI-N87细胞增殖的作用。流式细胞术检测显示联合组NCI-N87胃癌细胞凋亡较单药组明显升高(P<0.05),其中空白对照组、阿帕替尼组(1μmol/L)、曲妥珠单抗(0.1μg/ml)组及曲妥珠单抗(0.1μg/ml)+阿帕替尼(1μmol/L)组的凋亡率分别为(3.0±1.28)%、(5.8±1.63)%、(8.0±3.92)%和(21.6±6.85)%。曲妥珠单抗+阿帕替尼组与空白对照组、曲妥珠单抗及阿帕替尼单药组比较,HER-2蛋白表达显著下调(P<0.05);曲妥珠单抗+阿帕替尼组与空白对照组比较,Bcl-2蛋白表达、Bcl-2/Bax比值明显降低(P<0.01)。结论阿帕替尼联合曲妥珠单抗可能通过下调HER-2蛋白及调控凋亡相关蛋白Bcl-2、Bax的表达,协同抑制NCI-N87细胞增殖和促进细胞凋亡。     

探讨微型种植体支抗对青少年口腔正畸的效果

目的探讨微型种植体支抗治疗青少年口腔正畸的临床效果。方法纳入襄阳市中医医院口腔科100例青少年口腔正畸治疗患者。随机数字表分组,传统正畸疗法组对就诊青少年口腔正畸患者根据以往的常规治疗方法进行正畸治疗,微型种植体支抗治疗组则采用的是微型种植体支抗进行口腔的正畸干预。比对两组疗效;患者对牙齿矫正后外观的满意度评分;施治前后患者磨牙出现移位的距离、上中切牙倾角以及凸距的差值;牙齿松动发生比例。结果微型种植体支抗治疗组疗效、患者对牙齿矫正后外观的满意度评分、磨牙出现移位的距离、上中切牙倾角以及凸距的差值相比传统正畸疗法组有优势,P<0.05。微型种植体支抗治疗组牙齿松动发生比例低于传统正畸疗法组,P<0.05。结论对于需要进行正畸治疗的患者而言,在治疗过程,选择微型种植体支抗治疗可获得良好的效果,其进行正畸治疗的效果更为满意且不良情况出现率更少。     

A novel lncRNA-LINC01116 regulates tumorigenesis of glioma by targeting VEGFA

Brain glioma is the most common malignant tumor of the central nervous system, and one of the leading causes of death in patients with intracranial tumors. The clinical outcome of glioma is usually poor due to abundant vascularity, fast growth and susceptibility of invasion to normal brain tissues. Our microarray study showed that lncRNA-LINC01116 was significantly upregulated in glioma tissues and played an important role in cell proliferation, cycle, migration, invasion and angiogenesis. In addition, vascular endothelial growth factor (VEGFA) may be the major target genes in the downstream of lncRNA-LINC01116. Dual luciferase assay showed that LINC01116 and VEGFA both contained a miR-31-5p binding site, and LINC01116 could regulate the expression of VEGFA through competitive absorption of miR-31-5p. RNA immunoprecipitation indicated that LINC01116 and VEGFA were present in the miR-31-5p-RISC complex, and biotinylated miR-31-5p pull-down assay suggested that there was a competitive relationship between LINC01116 and VEGFA to bind with miR-31-5p. Collectively, our study has identified a novel lncRNA-LINC01116 and clarified the role and mechanism of LINC01116 in the tumorigenesis of glioma. LINC01116 may prove to be a potential target for the clinical diagnosis and treatment of glioma.     

The combination of oral-recombinant methioninase and azacitidine arrests a chemotherapy-resistant osteosarcoma patient-derived orthotopic xenograft mouse model

Cancer Chemotherapy and Pharmacology - Cancers are methionine (MET) and methylation addicted, causing them to be highly sensitive to MET restriction. The present study determined the efficacy of...     

物联网技术融入《生物医学传感器》实验教学改革的探索与实践

近年来，物联网技术迅猛发展，为医学教育融入物联网技术、培养医工结合的跨学科人才，开辟了广阔前景。研究者在《生物医学传感器》课程实验教学中融入物联网技术，改革实验教学内容和方法，开发设计出基于物联网技术的生物医学传感器实验教学系统；使学生理解物联网在智能医疗设备方面的系统设计方法，培养学生的动手能力和创新能力；并取得初步教学成效。     

苏州市初治菌阴肺结核患者就诊延迟现况及临床特征

目的 分析初治菌阴肺结核患者就诊延迟现况及临床特征,为制定有效措施提供科学依据。方法 应用横断面研究,收集苏州市5家结核病定点医院初治菌阴肺结核患者人口学、经济来源、生活方式、结核病知识、主要病史及进入结核病定点医院前发病和就诊等临床资料,采用Logistic回归方法进行统计分析。结果 379例初治菌阴肺结核患者就诊延迟186例,就诊延迟率为49.08%。老年人(OR=1.898,95% CI=1.157~3.112,P=0.011)、日工作时间大于8 h(OR=1.774,95% CI=1.014~3.102, P=0.044)、流动人口(OR=3.252; 95% CI=1.807~5.855, P<0.001)和发热(OR= 2.061,95% CI=1.021~4.160,P=0.043)是初治菌阴肺结核患者发生就诊延迟的危险特征,而咯血(OR= 0.356, 95% CI= 0.164~0.773,P=0.009)是就诊延迟的保护特征。结论 初治菌阴肺结核患者就诊延迟现象较严重,需对不同临床特征的患者采取综合干预措施,减少就诊延迟发生。