CA125和TPS在卵巢上皮性肿瘤诊疗中的意义

目的探讨血清CA125和TPS水平联合检测在卵巢肿瘤诊断中的价值,为卵巢肿瘤的诊断与病情监测提供新方法。方法用ELISA法分别检测卵巢良性肿瘤和卵巢癌患者术前及化疗前血清CA125和TPS水平。结果卵巢癌患者血清CA125和TPS水平均较良性肿瘤患者高,差异有显著性（P〈0.01）。血清CA125和TPS诊断卵巢癌的敏感度和特异度无差别。结论血清CA125和TPS水平可作为卵巢癌诊断与监测病情变化的临床指标。     

Polycation-functionalized nanoporous silicon particles for gene silencing on breast cancer cells

Nanoporous silicon particles (pSi), with a pore size in the range of 20–60 nm, were modified with polyethyleneimine (PEI) to yield pSi–PEI particles, which were subsequently complexed with siRNA. Thus, pSi–PEI/siRNA particles were fabricated, with the PEI/siRNA nanocomplexes mainly anchored inside the nanopore of the pSi particles. These hybrid particles were used as carriers to deliver siRNA to human breast cancer cells. Due to the gradual degradation of the pSi matrix under physiological conditions, the PEI/siRNA nanocomplexes were released from the pore interior in a sustained manner. Physicochemical characterization revealed that the released PEI/siRNA nanocomplexes exhibited well-defined spherical shape and narrow particle size distribution between 15 and 30 nm. Gene knockdown against the ataxia telangiectasia mutated (ATM) cancer gene showed dramatic gene silencing efficacy. Moreover, comprehensive biocompatibility studies were performed for the pSi–PEI/siRNA particles both in vitro and in vivo and demonstrated that the pSi–PEI particles exhibited significantly enhanced biocompatibility. As a consequence, PEI-modified porous silicon particles may have substantial potential as safe and effective siRNA delivery systems.     

人脐带间充质干细胞向胰岛素分泌细胞分化过程免疫特性的研究

目的研究人脐带间充质干细胞(huMSCs)向胰岛素分泌细胞(IPCs)分化过程中的免疫学特性,为huMSCs作为胰岛细胞移植治疗1型糖尿病的细胞来源提供依据。方法以流式细胞术检测huMSCs及huMSCs源性IPCs的免疫表型;RT-PCR法检测huMSCs及huMSCs源性IPCs的HLA-A、HLA-DR基因的表达;CCK8法测定细胞增殖率,观察huMSCs及huMSCs源性IPCs对外周血单个核细胞增殖的影响。结果 huMSCs在体外培养条件诱导下,具有向胰岛素分泌细胞分化的潜能;huMSCs及huMSCs源性IPCs均不表达CD80、CD86、CD40、CD40L、HLA-DR,均表达HLA-A;huMSCs能够抑制PHA刺激的外周血单个核细胞的增殖,但huMSCs源性IPCs未见该作用。结论 huMSCs及huMSCs源性IPCs均具有低免疫原性,可作为胰岛细胞移植的细胞来源,huMSCs对免疫反应具有负调节作用,但huMSCs源性IPCs不具有该作用。     

尿道下裂伴阴茎发育不良的内分泌改变及治疗

对１８例合并有阴茎发育不良的尿道下裂患儿进行了生殖内分泌测定和绒毛膜促性腺激素（ＨＣＧ）治疗。结果发现黄体生成素（ＬＨ）、促卵泡素（ＦＳＨ）及睾酮（Ｔ）水平与一般尿道下裂患儿差异不大。给予ＨＣＧ治疗后，血清Ｔ明确增加，随之阴茎增长、长粗，未发现明显副作用。治疗结果表明：①ＨＣＧ能有效地刺激这类患儿的睾丸产生Ｔ；②阴茎仅对较高浓度的Ｔ有反应。提示这类患儿阴茎发育不良可能与阴茎对Ｔ的敏感性较低有关。ＨＣＧ治疗不仅有助于改善小阴茎外观而且能为手术创造有利条件。     

双侧海马同时点燃与单侧海马点燃建立复杂部分性癫痫模型的对照研究

目的　观察双侧海马同时点燃时 ,是因破坏了点燃的拮抗作用而加速达到痫性发作 ,还是因点燃的拮抗作用的增强而延缓达到痫性发作。方法　按照Goddard方法将 2 0只成年Warster兔的双侧海马同时点燃 ,并与单侧海马点燃组作对照。结果　双侧海马同时点燃组 (BK)所有兔在平均 31次刺激后均出现 5期惊厥 ,8只兔显示有自发性痫性放电。在点燃早期 ,后放电 (AD)持续时间突然增加 ,此后逐渐增加。与单侧点燃 (UK)动物相比 ,双侧点燃法能显著提高动物点燃的成功率 (10 0 %对 5 5 % ,P <0 .0 1) ,但也显著减缓了点燃的进程 (31天 / 2 0天 ,P <0 .0 1)。结论　BK方法表现为神经元兴奋和抑制机制都增强。BK对点燃的致痫机制和筛选抗惊厥药物研究提供了一种更先进的复杂部分性癫痫动物模型。     

下调miR-409-5p对口腔癌细胞SCC-9增殖、迁移的影响

目的探讨下调微小核糖核酸-409-5p(miR-409-5p)对人口腔癌细胞SCC-9增殖、迁移的影响。 方法收集口腔癌患者口腔癌组织及癌旁正常组织,采用qRT-PCR检测癌组织及癌旁正常组织中miR-409-5p mRNA相对表达量。qRT-PCR筛选出细胞株SCC-9细胞后,将其分为空白对照组(Lip2000处理SCC-9细胞)、阴性对照组(Lip2000＋阴性对照序列处理SCC-9细胞)、miR-409-5p组(Lip2000和inhibitor-miR-409-5p共同处理SCC-9细胞)。采用MTT法、Transwell小室法检测miR-409-5p对细胞增殖、侵袭、迁移的影响。qRT-PCR法、Western blotting法检测细胞vimentin mRNA和蛋白的相对表达量。 结果与癌旁正常组织比较,口腔癌组织中miR-409-5p显著增加(P＜0.05)。与空白对照组和阴性对照组比较,miR-409-5p组细胞增殖、侵袭和迁移能力均下降(P＜0.05);miR-409-5p组vimentin mRNA和蛋白相对表达量也显著降低(P＜0.05)。 结论下调miR-409-5p能够抑制SCC-9细胞的增殖、迁移,其机制可能与下调vimentin蛋白表达有关。     

滋肾固髓汤通过调控p38MAPK/p53信号通路诱导结直肠癌HCT-116细胞凋亡

目的:探讨滋肾固髓汤对结直肠癌HCT-116细胞凋亡的影响及其分子机制。方法:制备滋肾固髓汤含药血清,首先采用不同体积分数滋肾固髓汤含药血清处理HCT-116细胞,噻唑蓝(MTT)检测细胞增殖活性;再将HCT-116细胞分为空白组、滋肾固髓汤低、中、高剂量组、SB203580(p38MAPK抑制剂)组和高剂量滋肾固髓汤+SB203580组,分别加入相应药物进行干预后,Hoechst 33258染色观察细胞凋亡的形态学变化;Annexin V-FITC流式细胞术检测细胞的凋亡水平;Western blot检测细胞中p38MAPK、磷酸化(p)-p38MAPK(Thr180/Tyr182)、鼠双微染色体2(MDM2)、p53、Cleaved caspase-3、Bax和Bcl-2等蛋白表达水平。结果:滋肾固髓汤可抑制HCT-116细胞增殖活性,并呈时间和浓度依赖性。不同浓度滋肾固髓汤处理可诱导HCT-116细胞呈现核聚集、皱缩或碎裂等凋亡形态变化,促进细胞凋亡,上调p-p38MAPK、p53、Bax和Cleaved caspase-3等蛋白表达水平,下调MDM2和Bcl-2蛋白表达水平。S...     

Surgical treatment of jugular vein phlebectasia in children

BACKGROUND: Jugular vein phlebectasia (JVP) is a cervical mass that occurs relatively infrequently and usually presents in children as a soft cystic swelling in the neck during straining. It is liable to be misdiagnosed or managed inappropriately. This report elucidates the clinical presentation, diagnosis, treatment choices, and postoperative complications of JVP, and diagnostic methods and treatment choices are recommended. METHODS: Fifty-one cases of JVP were reviewed (right vein in 38 patients, left in 7 patients, and bilateral in 6 patients). The internal jugular vein was involved the most frequently. The main complaint was a soft and compressible mass in the neck, becoming more prominent with the Valsalva maneuver. All of the children except 2 had an ultrasound or color Doppler flow imaging (CDFI) performed in combination with the Valsalva's breathing test. Surgical intervention was performed in 46 patients and the other 5 patients were followed-up conservatively for 2 to 15 years. RESULTS: Ultrasound or CDFI showed local dilatation of unilateral or bilateral veins in all patients except 2, and confirmed the diagnosis in combination with the Valsalva's breathing test. Surgical intervention included ligation of the involved jugular vein in 32 patients, and longitudinal constriction suture venoplasty plus encapsulation with medical Dacron cloth or PTFE in 14 patients. All of the children who had surgery recovered uneventfully, except 3 patients undergoing ligation of the right internal jugular vein. CONCLUSIONS: The Valsalva maneuver was most important for establishing the diagnosis. Ultrasound or CDFI, or in combination with the Valsalva's breathing test, was the diagnostic procedure of choice to confirm the diagnosis of JVP because of its clarity, safety, and low cost. Surgical intervention was recommended for cosmetic and psychologic purposes. Ligation or excision of the involved jugular vein was very safe, simple, and effective for most patients. However, in cases of lesions of the right and bilateral internal jugular veins, longitudinal constriction suture venoplasty plus encapsulation might be more preferable and safer, and should be recommended. Otherwise, treatment should be conservative (follow-up evaluation).     

电针“百会”、“三阴交”穴对慢性应激抑郁模型大鼠HPA轴的影响

采用放射免疫分析法观察电针“百会”、“三阴交”穴对慢性应激抑郁模型大鼠血浆皮质醇、促肾上腺皮质激素的影响 ;并用免疫组织化学并计算机图像分析法比较各组动物下丘脑室旁核精氨酸加压素阳性神经元的数量。结果显示抑郁模型组动物血浆皮质醇、促肾上腺皮质激素含量及下丘脑室旁核精氨酸加压素阳性神经元的数量明显高于正常组。而电针治疗组以上指标含量均显著低于模型组而接近正常值。说明对亢进的HPA轴功能的调整作用是电针治疗抑郁症的机制之一。     

多次采集计划CT评价前列腺癌靶区运动与直肠形变的相关性

目的利用多次采集计划CT(MAPCT)获取前列腺癌靶区运动数据及直肠形变,评价治疗前靶区各向位移与直肠形变间的相关性。方法纳入12例接受放射治疗的前列腺癌患者,于靶区内置入金标志物,于单次采集计划CT后第1、2及3天行3次MAPCT扫描,获得靶区各向位移数据和直肠戴斯相似系数(DSC);以Pearson相关性分析评价靶区位移与直肠形变之间的相关性,以直肠DSC为自变量(X),以MAPCT登记匹配位移为因变量(Y),对具有相关性的指标进行一元回归分析。结果前后方向靶区位移与直肠DSC呈正相关(r=0.915,P0.05);左右及头足方向位移与直肠DSC无明显相关性(r=0.341、0.397,P均0.05)。前后方向靶区位移与直肠形变量的一元回归方程为Y=-20.39+26.56X(P=0.001)。结论利用治疗前MAPCT数据可预估前后方向直肠形变,优化前列腺癌放射治疗计划。