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1.
《Biomaterials》2015
Malignant glioma is the most common intracranial tumor with a dismal prognosis. The radiosensitizing effect of silver nanoparticles (AgNPs) on glioma both in vitro and in vivo had been demonstrated in the previous studies of our group. However, the underlying mechanism is still unclear. Consistent with previous studies, a size and dose dependent antitumor effect and significant radiosensitivity enhancing effect of AgNPs were observed in our experiment system. We also found that cell protective autophagy could be induced by AgNPs and/or radiation, which was verified by the use of 3-MA. The mechanism through which had autophagy and the enhancement of radiosensitivity taken place was further investigated with inhibitors of ERK and JNK pathways. We demonstrated that ERK and JNK played pivotal roles in the radiosensitivity enhancement. Inhibiting ERK and JNK with U0126 and SP600125 respectively, we found that the autophagy level of the cells treated with AgNPs and radiation were attenuated. Moreover, SP600125 down-regulated the apoptosis rate of the co-treated cells significantly. Taken together, the present study would have important impact on biomedical applications of AgNPs and clinical treatment for glioma. 相似文献
2.
MOB1A regulates glucose deprivation-induced autophagy via IL6-STAT3 pathway in gallbladder carcinoma
Bo Yang Yang Li Rui Zhang Liguo Liu Huijie Miao Yongsheng Li Ziyu Shao Tai Ren Yijian Zhang Qiyu Zhang Yingbin Liu Hongqi Shi 《American journal of cancer research》2020,10(11):3896
MOB kinase activator 1A (MOB1A) plays an important role in many diseases and cancers. Here, we observed that MOB1A was substantially overexpressed in gallbladder carcinoma (GBC) tissues compared with nontumor tissues. The high expression of MOB1A was closely associated with poor survival in patients with GBC at advanced TNM stages. Furthermore, our study indicated that MOB1A promoted autophagy by activating the IL6/STAT3 signaling pathway and regulating the chemosensitivity to gemcitabine under glucose deprivation conditions both in vitro and in vivo. In conclusion, these findings suggested that MOB1A is critical for the development of GBC via the MOB1A-IL6/STAT3-autophagy axis. 相似文献
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4.
J. Epelbaum L. Tapia Arancibia J.P. Herman C. Kordon M. Palkovits 《Brain research》1981,230(1-2):412-416
Somatostatin (SRIF) in the central nervous system is mostly concentrated in the median eminence (ME). Immunocytochemical methods have revealed high densities of SRIF-positive perikarya between the preoptic area and the periventricular nucleus of the hypothalamus (NPE). The aim of the present study was to define more precisely the specific pathways of SRIF neurons from NPE to the ME. SRIF levels were measured by radioimmunoassay, following various hypothalamic transections. Frontal periventricular sections decreased SRIF-ME content by 70% (P less than 0.01), when located at the anterior end of the ME but no diminution was observed when the cuts were located anteriorly or posteriorly. Parasaggital transections decreased SRIF-ME levels by 50% (P less than 0.05) when located at the outer border of the ventromedial and premammillary nucleus, but the decrease was not significant when cuts were located anteriorly. Taken together, our data indicate that most SRIF-containing neurons, originating in the NPE, do not reach the ME directly along the border of the 3rd ventricle; instead they form a loop across the medial forebrain bundle before re-entering the mediobasal hypothalamus at the ME level. 相似文献
5.
Somatosensory nuclei in the brainstem of the rat: independent projections to the thalamus and cerebellum 总被引:2,自引:0,他引:2
The dorsal column nuclei and the sensory trigeminal nuclei project not only to the ventrobasal thalamus but also to the cerebellum. In this study the numbers and distribution of neurones projecting to these two regions were examined for the following nuclei: the rostral part of the main cuneate nucleus, the external cuneate nucleus, nucleus x, the principal sensory nucleus of the trigeminal nerve, and the oral, interpolar, and caudal subnuclei of the spinal nucleus of the trigeminal nerve. A thalamic projection from nucleus x and from the external cuneate nucleus was confirmed, and a distinct group of neurones projecting to the ventroposteromedial thalamus was distinguished near the ventromedial aspect of the principal sensory nucleus. Of the 165,000 neurones examined, only one was found to be double labelled. It was concluded that the populations of neurones that project to the ventrobasal thalamus and to the cerebellum are separate, and that somatosensory neurones in the brainstem do not send axon collaterals to both regions. 相似文献
6.
<正>1906年,Crile等人针对头颈部恶性肿瘤易发生颈淋巴结转移的情况提出了根治性颈淋巴清扫术(radical neck dissection,RND),这一术式在后来的很多年里,挽救了许多患者的生命。但RND损伤了副神经和颈部的一些重要的解剖结构,常导致患者斜方肌瘫痪萎缩,出现翼状肩胛、垂肩、肩周疼痛麻木、手臂活动受限、功能障碍等并发症, 相似文献
7.
目的探讨中药复方清热精化续嗣汤治疗男性附性腺炎不育的临床疗效。方法将80例附性腺炎不育患者随机分为治疗组和对照组各40例,治疗组采用复方清热精化续嗣汤随证加减治疗,对照组采用抗生素联合ATP治疗,疗程3个月,随访6个月,观察6个月妊娠率、精液常规、前列腺按出液常规等。结果治疗组治愈12例(30%),显效18例(45%),有效8例(20%),总有效率95%。对照组治愈3例(8%),显效12例(30%),有效16例(40%),总有效率78%。2组治愈率和总有效率比较有显著性差异(P均<0.05)。治疗后2组患者精液质量、精子密度活率及活动力、液化延迟或不液化均有所改善,但治疗组各项指标改善明显优于对照组(P均<0.05)。结论清热精化续嗣汤能全面改善附性腺炎不育患者的精液质量,从而可显著提高患者配偶受孕率。 相似文献
8.
17β-雌二醇对子宫内膜异位症患者在位子宫内膜间质细胞β-catenin mRNA和蛋白表达的影响 总被引:2,自引:0,他引:2
目的研究17β-雌二醇(17β-E2)对子宫内膜异位症(内异症)患者在位子宫内膜间质细胞β-catenin mRNA和蛋白表达的影响,探讨Wnt/β-catenin信号通路在介导雌激素促进内异症发生发展的作用。方法体外分离培养内异症患者在位子宫内膜间质细胞。用不同浓度17β-E2处理子宫内膜间质细胞48 h;此后选用10-10mol/L 17β-E2处理子宫内膜间质细胞12、24和48 h,逆转录聚合酶链反应(RT-PCR)和免疫印迹法(Western blotting)检测17β-E2处理前后子宫内膜间质细胞β-catenin mRNA和蛋白的表达水平。同法分析雌激素受体拮抗剂ICI182,780(10-6mol/L)对17β-E2促进β-catenin mRNA和蛋白表达的影响。免疫组织化学染色观察17β-E2作用后β-catenin在子宫内膜间质细胞中的定位。结果17β-E2能明显促进内异症患者在位子宫内膜间质细胞β-catenin mRNA和蛋白的表达,并呈剂量和时间依赖性,于10-10mol/L作用48 h最明显。雌激素受体拮抗剂ICI182,780能明显抑制17β-E2对子宫内膜间质细胞β-catenin mRNA和蛋白的表达。免疫组织化学染色发现17β-E2能促进β-catenin在子宫内膜间质细胞核内的表达。结论雌激素可能通过激活Wnt/β-catenin信号通路促进内异症在位子宫内膜的异位种植。 相似文献
9.
应用食管调搏,检测64例旁道参与的房室折返性心速患者Ⅰ、Ⅱ、Ⅴ1和食管导联的室房时距、P'v,Pet时距。发现左侧AP者RP'1较RP'V1短(P<0.01),而右侧AP时较RP'v1长(P<0.01)。 相似文献
10.