基于自动勾画和快速蒙特卡罗计算的放射治疗全身器官剂量数据库平台的可行性研究

目的:探讨建立一种放射治疗全身器官剂量数据库平台的可行性。方法:使用基于深度学习的自动勾画软件DeepViewer?1例食管癌患者的全身CT上勾画全身器官，然后利用基于GPU加速的蒙特卡罗软件ARCHER计算相应的器官剂量分布，最后利用Lyman-Kutcher-Burman（LKB）模型评估放疗患者正常组织并发症概率（NTCP）。结果:针对该病例，成功建立基于DeepViewer?ARCHER和LKB模型的全身器官剂量数据库，发现距离靶区越近的器官剂量越大，其中心脏与靶区间距离最小，剂量为14.11 Gy，但因其模型参数特殊，通过LKB模型计算的NTCP为0.00%；左、右肺的剂量分别为3.19和1.16 Gy，但是NTCP值却很大，分别为2.13%和1.60%。对于距离靶区较远的头颈部器官（视交叉、视神经和眼）和腹部器官（直肠、膀胱和股骨头）剂量分别约为9和2 mGy，并且NTCP均近似为0.00%。结论:研究结果证明通过自动勾画软件DeepViewer?蒙特卡罗软件ARCHER和LKB模型建立全身器官剂量数据库的可行性。     

基于虚实辨证的补泻平衡手法治疗膝骨关节炎临床研究

目的观察补泻平衡手法治疗膝骨关节炎的疗效及对患者临床症状、体征的影响。方法采用随机数字表法将220例单膝骨关节炎患者分为治疗组和对照组各110例。治疗组予补泻平衡手法,对照组予常规推拿手法,均每次20 min,每日2次,1周为1个疗程,连续治疗2个疗程。观察2组治疗前后及治疗后3、6个月全身临床症状、体征及中医证候评分,比较2组临床疗效及不良反应。结果与本组治疗前比较,2组治疗后全身临床症状、体征评分明显降低(P<0.05),治疗组中医证候评分明显降低(P<0.05);2组治疗后比较,治疗组全身临床症状、体征改善程度优于对照组(P<0.05);与本组治疗后比较,2组治疗后3、6个月全身临床症状、体征评分升高。治疗组治疗后3、6个月中医证候评分升高,仍低于治疗前(P<0.05)。治疗组总有效率为91.8%(101/110),对照组为78.2%(86/110),2组比较差异有统计学意义(P<0.05)。2组均未见不良反应。结论补泻平衡手法与常规推拿手法治疗膝骨关节炎均有效,前者疗效优于后者,且中远期疗效更佳。     

湖北贝母有效部位提取工艺的研究

目的优选湖北贝母有效部位即总生物碱的最佳提取工艺。方法采用正交实验设计,测定不同提取条件所得总生物碱的含量及收率,结合各实验样品药理效应强弱的评价,优选出湖北贝母有效部位的最佳提取工艺。结果当提取条件为以50%EtOH提取3次,1 h/次,4倍体积/次时,湖北贝母有效部位总生物碱的收率最高,其镇咳和平喘的综合药效最强,经过稳定性验证后,将该工艺确定为湖北贝母有效部位的最佳提取工艺。结论该研究以化学指标和药效指标相结合的方法来优选湖北贝母有效部位的最佳提取工艺,相对单纯化学指标来说更为科学和可信,可以有效防止以单纯化学指标优选出的工艺与药理效应不一致时的偏差,使优选出的工艺真正为活性导向下药材有效部位的最佳提取工艺。     

羊水粪染与羊膜腔感染的关系

【摘要】 目的 :探讨羊水粪染与羊膜腔感染的关系。方法 :选择未临产且胎膜完整的剖宫产产妇 5 6例 ,根据术中所见羊水性状分为羊水清亮组、羊水Ⅰ～II度粪染组和羊水III度粪染组。于剖宫产术中取羊水用双抗体夹心ELISA法测IL 6含量 ,取胎盘胎膜做病理检查以了解有无炎性细胞浸润 ,并记录新生儿Apgar评分 ,观察产妇术后有无产褥感染。结果 :3组羊水中IL 6含量差异无显著性 ,3组胎盘标本病理检查示炎性细胞浸润之差异亦无显著性 ,而羊水粪染组新生儿窒息发生率较清亮组明显增加 (P <0 .0 5 )。结论 :羊水粪染尤其是III度粪染是胎儿窘迫的标志 ,而与羊膜腔感染无明显相关性。     

慢性非细菌性前列腺炎/慢性盆腔疼痛综合征患者前列腺液中炎症因子差异表达的临床意义

Objective To investigate the role of inflammatory cytokines in the pathogenesis of chronic non-bacterial prostatitis/chronic pelvic pain syndrome (CAP/CPPS) patients. Methods The 38 cases with CAP/CPPS patients (18 cases of CAP and 20 cases of CPPS) and 20 cases of healthy controls were selected. The differential expressions of 40 kinds of inflammatory cytokines were detec-ted by antibody arrays in prostate fluid. Results The inflammatory cytokines which increased more than 1.5 times expression have been found. There were seven kinds in CAP including monocyte che-moattractant protein (MCP)-1, solution tumor necrosis factor receptor Ⅱ(s TNF R Ⅱ), platelet-de-rived growth faetor-BB (PDGF-BB), interleukin (IL)-β, IL-11、IL-6、MCP-2 and five kinds in CPPS groups including MCP-1、PDGF-BB、MCP-2、s TNF R Ⅱ、It-11 respectively, compared with healthy control group. The cluster analysis results showed that protein expression of Monocyte chemoattrac-tant protein 1 (MCP-1)and platelet-derived growth factor BB (PDGF-BB) were significantly increased in CAP (3.47 and 2.07 times) and CPPS (2.25 and 2.19 times) compared with healthy control group and were the final polymerization of inflammatory cytokines. The protein expression of interleukin 1 β (IL-1 β), MCP-1 and soluble tumor necrosis factor Ⅱ (s TNF R Ⅱ) in CAP group was increased more than 1.85,1.55,1.67 times compared with CPPS group. Conclusions Elevated expression of inflammatory cytokines may play an important role in the course of CAP/CPPS disease. The extent of the inflammatory response of CAP was higher than CPPS. The inflammatory factors of MCP-1 and PDGF-BB could serve as a novel diagnostic marker.     

长毛香科科化学成分及生物活性研究

目的:研究长毛香科科化学成分及生物活性.方法:采用各种色谱法分离,运用多种波谱技术和X-衍射鉴定结构;利用体外DPPH微量抗氧化模型、α-葡萄糖苷酶抑制模型和纸片扩散法进行抑菌活性筛选.结果:从长毛香科科醋酸乙酯部位分离鉴定了8个化合物:三(十八酸)甘油酯(1),2,5-二氧环戊酮(2),羊齿烯醇(3),△~(5,22)-豆甾烯醇(4),24-去亚甲胆甾-5,22(E)-二烯-3β-醇(5),α-菠菜甾醇(6),3,4-二羟基苯丙烯酸乙二醇单酯(7),3,4-二羟基苯丙烯酸(8).结论:化合物1～8为首次从该属中分离得到.生物活性测试结果表明化合物3[IC_(50)=(37.63±3.45)mg·L~(-1)],6[IC_(50)=(178.92±4.99)mg·L~(-1)]和8[IC_(50)=(44.32±7.02)mg·L~(-1)]体外抑制α-糖苷酶抑制活性远高于对照acarbose[IC_(50)=(1 081.27±12.3)mg·L~(-1)];化合物7[IC_(50)=(4.81±0.96)mg·L~(-1)]和8[IC_(50)=(4.16±0.11)mg·L~(-1)]抗氧化活性高于对照BHT[IC_(50)=(35.64±0.36)mg·L~(-1)]和BHA[IC_(50)=(8.74±0.39)mg·L~(-1)];化合物5～8均对小麦赤霉病有明显的抑制活性;化合物5和8对番茄灰霉病菌有明显抑制效果.     

中国三囊库蠓亚属的种类分布及分类研究(双翅目:蠓科)

本文报告了我国三囊库蠓亚属Culicoides(Trithecoides)已知24种。亚属的鉴别特征,主要特征测量值以及雌虫和雄虫分种检索表。     

Role of angiotensin Ⅱ and JAK2 signal pathway in transdifferentation of renal tubular cells in mice after acute ischemic followed by reperfusion

Objective To investigate the effect of angiotensin (Ang) Ⅱ and its Janns-activated kinase-2 (JAK2) signal pathway in transdifferentiation of renal tubular cells under the challenge of acute ischemic reperfusion injury.Methods Models of acute ischemic reperfusion injury were established and the level of local Ang Ⅱ ,a key element of renin-angiotensin system (RAS),in kidney was measured using radioimmunity technique.The expression of α-smooth muscle actin (α-SMA),a phenotype of mesenchymal cells,was detected by RT-PCR and inununohistochemistry methods.Renal tubule cells ( NRK-52E) were cultured with various concentration of Ang Ⅱ ,followed by blocking of PD123319,Ang U receptor 2 antagonist,and AG490,an inhibitor of JAK2 signal pathway.Results Ang 0 of kidney tissue increased immediately after acute ischemic-reperfusion injury,in time dependent fashion.Expression of α-SMA in renal tubule cells was found at 48 hours after ischemic-reperfusion injury and in NRK-52E cells treated by high concentration of Ang Ⅱ and was dose and time dependent.The peak of α-SMA expression was seen after 30 minute treatment at the dose of 10-9'mol/L,which was interrupted by both of PD123319 and AG490.Conclusions Transdifferentiarion of renal tubular epithelial cells occurs under acute ischemic- reperfusion injury.Local renin-angiotensin system may play a role in the transdifferentiation of TEC through AT2 receptor and its JAK2 signal pathway.     

EBVTK激酶基因在原核细胞中的表达及其在NPC诊断中的意义

目的 探索以Epstein-Barr病毒（EBV）TK激酶为抗原，建立简便、快速、敏感和特异的鼻咽癌（NPC）诊断方法。方法 构建原核表达载体pRSET-TK，在原核细胞BL21（DF3）中获得高效表达的TK激酶，以Western blot检测证明其抗原的特异性和应用于NPC检测的可行性。以纯化的TK激酶为抗原初步建立ELISA检测方法，检测NPC患者血清中TK／IgG抗体。结果 在NPC患者血清中含有特异的针对TK激酶的IgG抗体，Western blot TK/IgG检测的敏感度和特异度均为100％。结论 初步建立了ELISA TK／IgG诊断NPC方法，具有较高的敏感性和特异性。