沉默ACSL1表达抑制三阴性乳腺癌MDA-MB-231细胞的脂肪代谢及增殖和迁移

目的：研究抑制长链脂酰辅酶A合成酶1(long-chain acyl-CoA synthetase 1,ACSL1)表达对三阴性乳腺癌（triple-negative breast cancer,TNBC）细胞脂肪代谢的影响,并探讨其抑制TNBC细胞增殖和迁移等恶性表型的作用。方法：利用癌症基因图谱（e Cancer Genome Atlas,TCGA）数据库探究并分析ACSL1与乳腺癌预后的相关性,并对比不同乳腺癌亚型中ACSL1表达量的差异。在供给棕榈酸（palmiticacid,PA）的条件下培养TNBC型MDA-MB-231细胞和雌激素受体阳性的乳腺癌MCF-7细胞,并采用ATP生物发光法检测PA对细胞ATP产量的影响,以评估不同亚型乳腺癌细胞对脂肪酸代谢的偏好;同时采用CCK-8法检测PA对细胞活性的影响。为评估抑制ACSL1表达对TNBC型MDA-MB-231细胞脂肪酸代谢的影响,采用慢病毒感染的方法在MDA-MB-231细胞中沉默ACSL1的表达,随后采用蛋白质印迹法检测细胞中脂肪酸代谢相关蛋白ACSL1、肉毒碱棕榈酰转移酶1A(carnitine palmitoyltr...     

口服抗过敏药对CT增强碘剂毒副反应的预防效果

许多疾病在CT平扫基础上尚需进一步增强扫描才能明确诊断,由于碘剂造影增强可能存在碘剂毒副反应,甚至严重者可导致病人死亡,因此,减少或防止碘剂毒副反应,在CT增强造影检查中极为重要.     

34例婴幼儿睾丸肿瘤临床分析

目的提高婴幼儿睾丸肿瘤的诊治水平。方法对我院外科及福建医科大学附属第一医院小儿外科近10年收治的34例婴幼儿睾丸肿瘤的临床资料进行分析。结果采用保留睾丸手术(睾丸肿瘤剥除术)13例;经腹股沟切口或阴囊切口行患侧精索高位切除、睾丸切除术21例。随诊1年～9年,均无局部复发或转移。结论早期诊断、早期手术是婴幼儿睾丸肿瘤获得良好疗效的关键。应根据术中快速冰冻病理切片决定患侧睾丸的取舍;Ⅰ期患儿不必常规行腹膜后淋巴结清扫术;甲胎蛋白(AFP)的动态观察可判断肿瘤有无复发或转移。     

临床动态循证抗感染治疗银屑病的效果分析

目的 探讨银屑病细菌性病因发病特点和动态循证抗感染治疗的效果.方法 以细菌群相同步培养系统和复数菌直接药敏测试法,对住院病例的血和（或）尿进行培养和测试,选同一敏感抗感染药物,单品种、足剂量,由静脉缓慢给药,配合免疫双向调节剂辅助治疗,3个月为一个疗程.结果 40例患者血培养计336例次,细菌L型生长,厌氧菌和需氧菌均未生长,培养次数最多23次,最少4次,平均10.1次;尿培养81例次,需氧菌及兼性厌氧菌鉴定72株,细菌不稳定L型回复成细菌型鉴定27株.住院时间最长266 d,最短45 d,平均132.2 d.痊愈14例（35%）,基本痊愈17例（42.5%）,好转9例（22.5%）.结论 银屑病是以细菌稳定L型感染为主要特点的、内源性复数菌感染病,在机体天然免疫功能失调下,引发的全身性皮肤损害表象.在机体皮肤组织细胞准确休整配合下,动态循证选择敏感抗感染药物由静脉给药和免疫双向调节剂辅助治疗,可按期治愈.     

运动作为辅助治疗手段应用于癌症患者的可行性研究

0 引言 较早的研究认为,癌症患者不适宜进行体力活动,并且由于相关治疗后的一些遗留效应,患者的体力常不足以完成一定强度的体力活动.     

构建叶酸修饰的乳腺癌靶向纳米超声造影微粒

BACKGROUND: Studies have testified that nano-ultrasound contrast agents have a strong permeability, making it possible to image the targeted tissues outside blood vessels and overcome the limitation that micron contrast agents are only available for the blood pool imaging. OBJECTIVE: To construct the folate-modified nanoparticles targeting breast cancer as ultrasound contrast agents, as well as to observe their ability to specifically bind to cells and imaging effect in vitro. METHODS: Both contrast agents, pegylated lactic acid-glycolic acid copolymer wrapping liquid fluorocarbon formed nanoparticles (mPP/PFOB) and folate modified pegylated lactic acid-glycolic acid wrapping liquid fluorocarbon formed nanoparticles (mPPF/PFOB), were constructed by phacoemulsification-evaporation method. (1)Biocompatibility detection: HFF-1 and MCF-7 cells in the logarithmic phase were cultivated with various concentrations (0, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2 and 1 g/L) of mPP/PFOB or mPPF/PFOB for 24 hours respectively, and then the cell viability was measured. (2)Targeting ability detection in vitro: HFF-1 and MCF-7 cells in the logarithmic phase were divided into three groups. Cy5-labled mPP/PFOB and mPPF/PFOB were added into groups A and B, respectively; the cells in group C were pretreated with folate for 2 hours, and sequentially Cy5-labled mPPF/PFOB was added into group C. Fluorescence intensity was detected by flow cytometry after 0.5 hours of culture. The distribution of contrast agents in cells was observed using confocal microscopy after 20 minutes of culture. (3)Ultrasound imaging in vitro: there were three groups: saline was as group A; the suspension of saline and mPPF/PFOB nanoparticles was prepared as group B; MCF-7 cells were resuspended with the mixture of saline and mPPF/PFOB nanoparticles to prepare the suspension of nanoparticles and cells as group C. In each group, the suspension was added into latex gloves, that were then tightened and immersed in water. Finally, the ultrasound was use to detect the ultrasound imaging effect in vitro. RESULTS AND CONCLUSION: Neither nanoparticles were with significant cytotoxicity. The flow cytometry showed that the mean fluorescence intensity in MCF-7 cells of group B was significantly higher than that of groups A and C. But there were no significant differences in the mean fluorescence intensity in HFF-1 cells among the three groups. It was observed that mPPF/PFOB mainly gathered around the MCF-7 cell membrane, while mPP/PFOB randomly distributed in the cytoplasm. After mPPF/PFOB binding to MCF-7 cells, they could enhance ultrasound echo in vitro. These findings indicate that the targeted nanoparticles mPPF/PFOB have good biocompatibility and can specifically bind to breast cancer MCF-7 cells in vitro and enhance the imaging capability.     

乳糖酸修饰mPEG-PLGA-PLL纳米粒靶向肝癌细胞Huh7的研究

背景与目的:去唾液酸糖蛋白受体(asialoglycoprotein receptor,ASGPR)是一种肝细胞特异性表达的膜表面蛋白,能够特异性地识别带有半乳糖残基的糖蛋白。乳糖酸含有半乳糖基团,可以作为靶向肝癌的特异性配基。该研究旨在探讨乳糖酸修饰的聚乙二醇/聚丙交酯-乙交酯/聚赖氨酸[methoxy-poly(ethylene glycol)-b-poly(D,L-lactide-co-glycolide)-b-poly(L-lysine)(mPEG-PLGA-PLL)纳米粒,mPEG-PLGA-PLL-GAL NPs)]对肝癌Huh7靶向效果,为构建新型的靶向肝癌的纳米递送系统提供实验数据。方法:MTT法确定Huh7细胞摄取mPEG-PLGA-PLL NPs与mPEG-PLGA-PLL-GAL NPs适当的浓度;通过激光共聚焦和荧光显微镜定性观察Huh7对罗丹明B标记的mPEG-PLGA-PLL NPs和mPEG-PLGA-PLL-GAL NPs的摄取;并采用流式细胞计数仪定量研究Huh7细胞对两者的摄取差别;尾静脉注射荷Huh7瘤裸鼠研究两者体内分布情况。结果:mPEG-PLGA-PLL NPs与mPEG-PLGA-PLL-GAL NPs的浓度在0.2 mg/mL时细胞存活率较高且对Huh7细胞的毒性较小。激光共聚焦断层扫描显示Huh7细胞可以较好地摄取mPEG-PLGA-PLL-GAL NPs,同时流式细胞仪定量显示mPEG-PLGA-PLL-GAL NPs在Huh7细胞的分布较mPEG-PLGA-PLL NPs高40%(P<0.05)。mPEG-PLGA-PLL NPs与mPEG-PLGA-PLL-GAL NPs在移植瘤中的分布明显多于其他脏器,并且随时间的延长mPEG-PLGA-PLL-GAL NPs体现了更好的靶向效果。结论:体外与体内实验证明乳糖酸修饰的mPEG-PLGA-PLL NPs对肝癌细胞Huh7有很好的靶向效果,可为肝癌的靶向治疗提供较好的药物载体。     

4种人肾细胞癌原位移植裸鼠模型建立方法的比较

背景与目的:肾细胞癌是最常见的肾脏恶性肿瘤,起病隐匿,恶性程度高.研究旨在建立成功率高、稳定的人肾细胞癌原位动物造模方法.方法:采用人肾细胞癌细胞(786-0、ACHN)进行细胞悬液原位注射法、皮下成瘤后引瘤原代细胞悬液原位注射法、皮下成瘤后引瘤组织块原位移植肾包膜下法及皮下成瘤后引瘤组织块原位移植肾周筋膜内法建立原位移植裸鼠模型,采用PET/CT、H-E染色、免疫组织化学染色及血清生化检测等手段观察成瘤率及肿瘤生长情况,评估4种方法的建模效果.结果:人肾细胞癌皮下移植瘤裸鼠模型,ACHN组成瘤率(90%)高于786-0组(30%);人肾细胞癌原位移植裸鼠模型,786-0原位注射组、ACHN原位注射组、ACHN皮下移植瘤引瘤后原代细胞原位注射组、ACHN组织块肾包膜下包埋组和ACHN组织块肾周筋膜内包埋组的成瘤率分别为33%、80%、90%、100%和20%,其中以ACHN皮下成瘤后引瘤组织块原位移植肾包膜下法成瘤率最高,影像学及病理组织学检查结果显示符合低分化肾细胞癌.结论:成功建立4种人肾细胞癌原位移植裸鼠模型,其中以ACHN皮下成瘤后引瘤组织块原位移植肾包膜下法成瘤效果最佳,为肾细胞癌发病机制及靶向治疗的进一步研究提供理想的动物模型.     

归灵止痛酊结合内服中药治疗神经根型颈椎病

采用自制的“归灵止痛酊”外用,配服白芍灵仙汤治疗63例神经根型颈椎病,显效46例占73％,有效13例占21％,无效4例占6％,总有效率为94％。     

抗HER2抗体修饰的聚乙二醇化壳聚糖载基因纳米粒的制备与表征

以甲氧基聚乙二醇(mPEG)接枝壳聚糖(CS)为载体制备载小干扰RNA (siRNA)的纳米粒,并用抗人表皮生长因子受体2抗体(anti-HER2)进行表面修饰.扫描电镜观察到所得纳米粒的形态为类球形,平均粒径为(160±2.4)nm,平均ζ电位(23.5+1.7)mV,包封率为(64.2±1.6)％.体外释放试验表明,制品在初始12 h内(突释阶段)的累积释放率为14％～18％,144 h时累积释放率约70％.体外细胞试验表明,表面经anti-HER2修饰的纳米粒对SKBR-3乳腺癌细胞无明显毒性,提示其作为基因递送载体安全性较高、毒性较低.