细松管层绞式光缆和气送技术的进展

综述了细松管层绞式光缆在利用气送技术进行安装,在节约光缆与管道成本和减少对环境污染等方面的优越性。阐述了为了在减小管径的情况下能够保持适当的抗拉性能和高低温性能,必须仔细选用松管材料和改进挤出工艺以获得适当的光纤余长。介绍了芬兰NK光缆公司在细松管用材料的选择和工艺改进方面所取得的成果介绍了英国电信与Pirelli光缆厂等合作进行的细松管层绞式光缆的试制和现场试验情况。

细银质针导热松解联合臭氧注射与神经根脉冲射频治疗带状疱疹后神经痛的疗效比较

目的:探讨细银质针导热松解联合臭氧注射与神经根脉冲射频治疗带状疱疹后神经痛(postherpetic neuralgia,PHN)的疗效。方法:选择中日友好医院疼痛科2018年1月至2019年11月PHN病人80例,随机均分为细银质针导热松解联合臭氧注射组(S组)和神经根脉冲射频组(R组)。观察术前、术后1小时、3个月、6个月的视觉模拟评分法(visual analogue scale,VAS)评分、阿森斯失眠量表(Athens insomnia scale,AIS)评分、生活质量指数问卷(quality of life index,QL-index)评分和总体疗效。结果:两组病人术前VAS、AIS和QL-index评分无统计学差异,术后1小时、3个月和6个月,两组的VAS和AIS评分均明显低于术前基础值,且QL-index评分明显高于术前基础值(P<0.01)。两组术后1小时的VAS和AIS评分无统计学差异,但术后3个月、6个月时S组明显低于R组(P<0.05)。两组QL-index评分和总体有效率在各时间点无统计学差异。结论:细银质针导热松解联合臭氧注射和神经根脉冲射频均可有效治疗PHN,但细银质针导热松解联合臭氧注射的痊愈率更高。

Novel therapy for idiopathic pulmonary arterial hypertension： Can hepatocyte growth factor be beneficial？

Idiopathic pulmonary arterial hypertension （IPAH） is a progressive, nearly fatal condition that until recently has had very few treatment options. Median survival time for untreated IPAH was 2.8 years without effective drug intervention. IPAH is characterized by deregulated proliferation of pulmonary arterial endothelial and intimal smooth muscle cells resulting in progressive pulmonary vascular remodeling and an increase in pulmonary arterial pressure. In order to alleviate their symptoms, anticoagulants, diuretics, calcium channel blockers and inotropic agents have been used to treat patients with PAH. Moreover, specific targeted therapies using prostacyclins,

Identification of deregulated miRNAs and their targets in hepatitis B virus-associated hepatocellular carcinoma

AIM： TO identify the differentially expressed miRNAs and their targets in hepatitis B virus （HBV）-associated hepatocellular carcinoma （HCC）. METHODS： Six hundred and sixty seven human miRNAs were quantitatively analyzed by Taqman lowdensity miRNA array （TLDA） in HBV-HCC tissues. Gene ontology （GO） and Kyoto Encyclopedia of Genes and Genomes （KEGG） pathway analyses were used to analyze the significant function and pathway of the differentially expressed miRNAs in HBV-HCC. TargetScan software was used to predict the targets of deregulated miRNAs. Western blotting and luciferase assay were performed to verify the targets of these miRNAs.RESULTS： Ten up-regulated miRNAs （miR-217, miR- 518b, miR-517c, miR-520g, miR-519a, miR-522, miR- 518e, miR-525-3p, miR-512-3p, and miR-518a-3p） and 11 down-regulated miRNAs （miR-138, miR-214, miR-214#, miR-199a-5p, miR-433, miR-511, miR-592, miR-483-3p, miR-483-5p, miR-708 and miR-1275） were identified by Taqman miRNAs array and confirmed quantitatively by reverse transcription polymerase chain reaction in HCC and adjacent non-tumor tissues. GO and KEGG pathway analysis revealed that ＂regulation of actin cytoskeleton＂ and ＂pathway in cancer＂ are most likely to play critical roles in HCC tumorigenesis. MiR- 519a and ribosomal protein S6 kinase polypeptide 3 （RPS6KA3） were predicted as the most significant can-didates by miRNA-mRNA network. In addition, cyclin D3 （CCND3） and clathrin heavy chain （CHC）, usually up-regulated in HCC tissues, were validated as the di- rect target of miR-138 and miR-199a-5p, respectively.

Progress of research in miR-218 and cervical cancer

MicroRNAs （miRNAs） are small endogenous non-coding RNAs which can specifically silence gene expression, and thereby alter cell and organism phenotype. Deregulation of miRNA expression has been discovered in a variety of tumors and it is now clear that they contribute to cancer development and progression. Previous studies have indicated that miRNAs are involved in developmental timing, cell proliferation, apoptosis, morphogenesis [1], antiviral defense 121, and tumorigenesis [3]. In cancer pathways, altered expression of tumor suppressive or oncogenic miRNAs can disrupt regulatory mechanisms normal. Altered miRNAs expression patterns have been observed in a variety of diseased tissues. Cervical cancer is the most common malignant tumor in female reproductive tract. Recently more and more study showed a large number of miRNAs were down-regulated or up-regulated in cervical cancer. Recent data revealed that miRNA-218 （miR-218） played important roles in tumor initiation and development. This review focuses on analysis of miR-218 and will provide some insight into the progress of cervical cancer.

Small G Rac1 is involved in replication cycle of dengue serotype 2 virus in EAhy926 cells via the regulation of actin cytoskeleton

Bleeding is a clinical characteristic of severe dengue and may be due to increased vascular permeability. However, the patho- genesis of severe dengue remains unclear. In this study, we showed that the Racl-microfilament signal pathway was involved in the process of DENV serotype 2 （DENV2） infection in EAhy926 cells. DENV2 infection induced dynamic changes in actin organization, and treatment with Cytochalasin D or Jasplakinolide disrupted microfilament dynamics, reduced DENV2 entry, and inhibited DENV2 assembly and maturation. Racl activities decreased during the early phase and gradually increased by the late phase of infection. Expression of the dominant-negative form of Racl promoted DENV2 entry but inhibited viral as- sembly, maturation and release. Our findings demonstrated that Racl plays an important role in the DENV2 life cycle by reg- ulating actin reorganization in EAhy926 cells. This finding provides further insight into the pathogenesis of severe dengue.