补肾固本方对大鼠骨质疏松模型中PI3K/AKT/mTOR信号通路表达的调控研究

目的观察补肾固本方对去卵巢骨质疏松(osteoporosis,OP)大鼠骨组织中PI3K/AKT/mTOR信号通路的影响,探讨补肾固本方干预OP的作用机制。方法将100只SD大鼠随机分为5组:正常组(C组)、模型组(M组)、补肾固本方组(B组)、补肾固本方+PI3k受体特异性阻断剂LY294002组(B+L组)、PI3k受体特异性阻断剂LY294002组(L组),除正常组外,其余4组建立去卵巢大鼠OP模型。药物连续干预12周后,采用ELISA方法检测血清中E2、BGP、ALP水平,实时荧光定量聚合酶链式反应(Real-time PCR)检测各组股骨组织中LC3、Beclin1、caspase-9 mRNA的表达情况,蛋白质印迹法(Western blot)检测各组股骨组织中PI3K、AKT、mTOR蛋白的表达。结果补肾固本方可显著增高OP大鼠血清E2水平,降低BGP、ALP水平,显著上调LC3、Beclin1表达水平,降低caspase-9、PI3K、p-AKT、mTOR的表达;而上述变化能够被PI3k受体特异性阻断剂LY294002所阻断,且其差异具有统计学意义(P0.05)。结论补肾固本方减少去卵巢后大鼠OP的发生,其机制可能与抑制PI3K/AKT/mTOR信号通路及其下游基因蛋白表达有关。     

HPLC-ELSD法测定鸦胆子油中四种甘油三酯的含量

目的：建立鸦胆子油中1,2--二亚油酸-3-油酸甘油酯、1,3--二油酸-2-亚油酸甘油酯、三油酸甘油酯、1,3---油酸-2-棕榈甘油酯的含量测定方法.方法：运用岛津2010C高效液相色谱仪和奥泰2000蒸发光检测器,采用Waters C18色谱柱（250 mm×4.6mm,5μm）;流动相为乙腈-二氯甲烷（65∶35）,流速1.0 ml·min-1;检测温度：70℃.结果：四种甘油三酯分别在0.184～2.763 μg、0.382～5.724μg、0.406 ～6.084 μg和0.204～3.066 μg之间线性关系良好,r值分别为0.999 0、0.999 2、0.999 1和0.999 0,回收率分别为99.01％、98.70％、98.92％和98.46％,RSD分别为0.7％、0.5％、0.8％和0.9％.结论：该方法操作简单,分离效果好,灵敏度高,可更好的控制鸦胆子油的质量.     

脑海绵状血管畸形与动静脉畸形对放疗的不同反应

目的 探究脑海绵状血管畸形(CMs)与动静脉畸形(AVMs)的结构差异和对于放射外科治疗反应的不同.方法 实验样本共33例,包括放射外科治疗后的CMs 3例,放射外科治疗后的AVMs 3例,未经照射的CMs 6例,未经照射的AVMs 17例和健康对照4例.取材后立即处理,并应用光学显微镜和透射电子显微镜观察5组间的超微结构差异.结果 CMs显示管腔直径与血管壁的厚度较大而且缺乏内皮下成纤维细胞,肌成纤维细胞和平滑肌细胞.CMs放射外科治疗后形成部分蛋白质凝块(管腔的19％ ～22％),在放射治疗后长达6年后也未出现完整的血管闭塞.AVMs观察到由纤维蛋白血栓组成永久性的血栓,使血管完整的闭塞(管腔的91％ ～ 98％).照射诱导病灶周围的脑组织发生神经元丢失和神经原纤维变性.结论 CMs与AVMs的血管结构及细胞成分的不同导致它们对放射外科治疗的反应不同.     

The efficacy and safety of health qigong for anti-aging: Protocol for a systematic review and meta-analysis

Background:Aging is a phenomenon that human''s physiology and psychology is progressive decline for natural environment. Health Qigong, as a convenient and effective exercise therapy,is widely used for anti-aging. However, there are no systematic reviews or meta-analysises to evaluate the efficacy and safety of Health Qigong on anti-aging.Methods:We will systematically search for 7 English databases(PubMed, Excerpta Medica Database, MEDLINE, Web of Science, Cochrane Library, SpringerLink, and WHO International Clinical Trials Registry Platform) and 4 Chinese databases(namely the China National Knowledge Infrastructure Database, the Wanfang Database, the Chinese Scientific Journal Database, and the Chinese BioMedical Literature Database) from their inceptions to August 2020. Randomized controlled trials (RCTs) using Health Qigong to anti-aging will be included. After the selection and extraction of eligible studies, a meta-analysis will be undertaken to assess the efficacy and safety of Health Qigong on anti-aging. Moreover, study selection, data extraction, and the evaluation of the methodological quality of trials will each be independently completed by at least 2 researchers. The Review Manager Software V.5.3 will be employed for meta-analysis to assess the risk of bias, data synthesis, and subgroup analysis.Results:This review will provide the latest knowledge and evidence on the efficacy and safety of Health Qigong for anti-aging through the analysis of various evaluation scales.Conclusion:The conclusion of this review will help clinicians provide effective exercise therapy for anti-aging.Registration number:INPLASY202090017     

基于牙体牙髓、牙周及功能健康的 显微微创牙体预备

牙体预备技术是口腔美学修复治疗必知必会的核心操作,通过一定量的牙修复体组织的磨除,为目标修复体提供容纳空间、粘接面与完成线等。如何在完成高质量牙体预备的同时还能保存牙体、保护活髓和牙周组织是美学修复牙体预备中亟需解决的难题。本文就微创牙体预备的概念及核心要素,显微牙体预备涉及的解剖生理学、显微牙体预备术前设计进行介绍,并总结了显微牙体预备技术临床路径,提出了显微牙体预备核心因素——量与形的新认知。     

Prognostic comparison of transoral laser microsurgery for early glottic cancer with or without anterior commissure involvement: A meta-analysis

ObjectivesTransoral laser microsurgery (TLM) has gradually gained approval in the treatment of early glottic cancer. However, the oncological outcomes of TLM for glottic cancer with anterior commissure (AC) involvement are still a controversial topic. We aimed to systematically review the literature on glottic cancer (Tis-T2) with patients who received TLM as first choice therapy and to evaluate several prognostic outcomes in patients with or without AC involvement.MethodsA systematic literature retrieval was conducted in PubMed, Medline (Ovid) and Web of Science. Risk ratio (RR) between AC involvement (AC+) or without AC involvement (AC?) was assessed and 95% confidence interval(95%CI) was calculated, which was performed on RevMan 5.3.ResultsA total of 20 literatures were included when comparing the local recurrence (LR) rate of patients with or without AC involvement, and the results suggested LR matters in group AC+ over group AC? (RR = 2.39, 95%CI = 1.99–2.86, p < 0.00001). The 5-year overall survival(5yOS) rate included 10 studies, and there was no significant difference between AC+ and AC? (RR = 0.98, 95%CI = 0.93–1.02, p = 0.35). The laryngeal preservation rate (LPR) of AC+ was lower than that of AC? (RR = 0.97, 95%CI = 0.94–1.00, p = 0.04).ConclusionThe results indicate that the prognosis of early glottic cancer with AC involvement is more likely to have higher local recurrence and lower LPR but no statistical difference in 5yOS rate.     

Anatomic Liver Resection of Segments 6, 7, and 8 by the Method of Selective Occlusion of Hepatic Inflow

Anatomic liver resection not only enables enough tumor-free resection margin but also guarantees maximum preservation of remaining normal liver tissue. We report herein a hepatocellular carcinoma patient who underwent successful anatomic liver resection of segments 6, 7, and 8 by the method of selective occlusion of hepatic inflow. Multiple tumors were found in segments 6, 7, and 8 by computed tomographic (CT) scanning. CT volumetry analyzed that his left hemi-liver volume was less than the minimal limit of safe survival. Therefore, we planned to perform segment 5 remaining, anatomic liver resection of segments 6, 7, and 8 to guarantee the maximum preservation of remaining normal liver tissue. Selective occlusion of hepatic inflow was creatively used twice in this case to divide right hemi-liver Glissonean pedicle and segments 6 and 7 Glissonean pedicle, respectively. Thus, the resection line was determined, and anatomic liver resection of segments 6, 7, and 8 was completed. Selective right hemi-liver Glissonean pedicle occlusion was used, while parenchymal transection was between segments 6 and 5 and between segments 8 and 5. Therefore, liver ischemia reperfusion injury and homodynamic instability were maximally reduced during operation.