Effect of low intensity laser irradiation on surgically created bony defects in rats

Low intensity lasers have been used by clinicians to improve healing and reduce pain in humans. Lasing also results in new bone formation around hydroxyapatite implants and a significant increase in the total bone area. However, the exact mechanism of cell biostimulation by laser is still unclear. This study biochemically assessed the effects of low intensity laser (Gallium-Arsenide) using 4 and 22.4 mW cm(-2) power density on the bone healing process after surgically creating bony cavities in rat mandibles. Rats (n = 24) were divided into two groups each treated with specific energy, 4 or 22.4 mW cm(-2), for 3 min each day post-surgery. Surgical cavities were created on both sides of the mandible: the left served as an untreated control, the right was treated with laser. All rats were sacrificed after 1, 2 and 4 weeks of treatment. In the newly formed callus, accumulation of radiocalcium and alkaline phosphatase activity was measured to indicate osteogenic activity. One-way anova with repeated measures showed that the low intensity laser using 4 mW cm(-2) power density significantly increased radiocalcium accumulation from 2 weeks post-surgery, whereas 22.4 mW cm(-2) had no effect. No changes were noted in the activity of alkaline phosphatase with the laser treatment. These results suggest that laser therapy of low power density is effective on the bone healing process in artificially created osseous cavities by affecting calcium transport during new bone formation.     

Evidence that cyclosporin A administration induces the formation of new cementum-like islets inside the gingival connective tissue

Two groups of 3 male Sprague-Dawley rats were given orally 30 mg/kg/d of vehicle (control group) or cyclosporin-A (experimental group) solution for 14 wk. The rats were anesthetized, tissues fixed by intracardiac perfusion of fixative solution and jaws dissected, demineralized, processed for Epon inclusion and cut by semi-thin serial sections. Histological examination revealed the presence of several islets located paravascularly inside the gingival connective tissue in the proximity of the root surfaces. The structure of these new cementum-like islets (NCLIs) was either compact and homogeneous or heterogeneous, but identical to that of the adjacent new cementum (NC) deposits. Histomorphometric evaluation indicated that the volume and the external surface of the NCLIs varied from 2354 to 679,497 μm³ and from 465 to 47,517 μm², respectively. These observations (a) suggest that CsA stimulates possibly paravascular progenitor cells which secrete in situ a NC-like material and (b) provides further evidence about the high potential of CsA to induce NC formation.     

针对性护理干预对根治性膀胱全切回肠原位膀胱术后新膀胱功能的影响

目的 分析针对性护理干预对根治性膀胱全切回肠原位膀胱术后新膀胱功能的影响.方法 选择2018年7月至2020年7月收治的80例行根治性膀胱全切回肠原位膀胱术治疗患者为研究对象,按照护理方法将其分为对照组与观察组,各40例.对照组给予常规护理干预,观察组在此基础上给予针对性护理干预.比较两组的护理效果.结果 观察组的排尿困难、尿失禁、泌尿系统感染发生率低于对照组,膀胱功能分级优于对照组(P<0.05).术后3个月,观察组的膀胱容量、膀胱逼尿肌压力大于对照组,残余尿量少于对照组,SF-36各维度评分高于对照组(P<0.05).观察组的护理满意度显著高于对照组(P<0.05).结论 针对性护理干预应用于根治性膀胱全切回肠原位膀胱术后患者中,有助于促进新膀胱排尿功能恢复,改善患者预后.     

基于指纹图谱、多指标定量及网络药理学的大黄质量标志物预测分析

目的 建立大黄HPLC指纹图谱及多指标定量分析方法,结合网络药理学预测大黄潜在质量标志物。方法 采用HPLC对20批掌叶大黄样品中的没食子酸、儿茶素、表儿茶素等13种指标性成分进行含量测定,采用中药色谱指纹图谱相似度评价系统进行相似度分析,以13种指标成分含量进行主成分分析、正交偏最小二乘判别分析,采用网络药理学预测大黄相关成分的作用靶点和通路,构建成分-靶点-通路网络图并对核心靶点进行器官定位分析以预测大黄的潜在质量标志物。结果 指纹图谱相似度在0.882～0.998,共确定了15个共有峰,大黄素甲醚、儿茶素、大黄素-1-O-葡萄糖苷、大黄素甲醚-8-O-葡萄糖苷、芦荟大黄素-8-O-葡萄糖苷是差异化合物,可用于鉴别和区分大黄质量。经筛选得到15个化合物,8个核心靶点,包括AKT1、TP53、JUN、HSP90AA1、CASP3、EGF、TNF、IL-6,涉及对氧化应激的反应、对脂多糖的反应、内肽酶活性,涉及脂质和动脉硬化、MAPK信号传导途径、AGE-RAGE信号通路在糖尿病并发症中的作用、非酒精性脂肪性肝病等通路,并构建成分-靶点-通路图,预测没食子酸、儿茶素、芦荟大黄素、大黄酸...     

三氧化二砷新剂型的研究进展

三氧化二砷是急性早幼粒细胞白血病的一线用药,对多种实体瘤也具有抑制作用。然而,三氧化二砷肾脏清除速率快,无组织特异性分布,靶向性较差,易产生心、肝和肾等毒性作用,限制了其在实体瘤的临床应用。近年来,科学家开发大量三氧化二砷新剂型以提高其疗效,降低其不良反应,包括脂质体、微球、纳米粒、乳剂和悬浮剂等。本文对三氧化二砷的新剂型研究进展进行梳理,以期为三氧化二砷新剂型的合理开发和应用提供新思路。     

人工智能在抗肿瘤药物研发中的应用与进展

随着人工智能的飞速发展以及人们对肿瘤疾病机制的认识逐渐加深,人工智能在抗肿瘤药物的研发中起到了重要作用。本文简要介绍了人工智能的主要模型及在药物研发方面的优势,并基于结构、配体、肿瘤细胞表型及电子健康记录四大方面综述了近年来人工智能在抗肿瘤药物研发中的应用与进展,并总结了人工智能应用于抗肿瘤药物研发中的机遇与挑战,以期为从事相关领域的科研技术人员提供思路与参考。     

植物外泌体样纳米囊泡的研究进展

植物外泌体样纳米囊泡(plantexocrine-likenano-vesicles,PELNs)是一种新兴的纳米治疗剂及传递平台,不但具有疾病治疗潜力,而且可以作为药物的载体靶向疾病位点,起到治疗递送双重作用,更重要的是PELNs具有绿色天然和低免疫原性等特点。本综述系统介绍了PELNs的外囊阳性细胞器、多囊泡体、液泡和自噬小体几种分泌机制;脂质、蛋白质和核酸3种组成成分;离心法、超滤法、尺寸排阻色谱法、流场-流分馏法、免疫磁珠法、聚合物沉淀法等分离方法及其抗炎、抗肿瘤、保护再生、抗病毒、保肝等生物学功能,整理了PELNs作为治疗剂及分子传递平台目前已发现的潜在机制,提出了PELNs研究过程中存在的产量化、机制研究及临床试验少等问题,并展望了其未来的发展潜力。     

新时代高校网络育人工作的思考与实践——以温州医科大学为例

网络育人是立德树人的战略之举,是三全育人的应有之义,是思想政治教育创新的重要路径。针对当前高校网络育人工作依然存在的内容供给缺乏吸引力、平台建设参差不齐、育人力量孤立分散、舆情应对准备不足、育人机制尚不完善等现实困境,温州医科大学探索构建起内容供给力、平台传播力、力量协同力、舆论引导力、机制再生力“五力协同”网络育人模式,对全国高校网络育人工作路径的探索具有重要借鉴意义。