Immune-related long noncoding RNA zinc finger protein 710-AS1-201 promotes the metastasis and invasion of gastric cancer cells

BACKGROUND Gastric cancer(GC)is a prevalent malignant tumor of the gastrointestinal system.ZNF710 is a transcription factor(TF),and zinc finger protein 710(ZNF710)-AS1-201 is an immune-related long noncoding RNA(lncRNA)that is upregulated in GC cells.AIM To assess the correlation between ZNF710-AS1-201 and immune microenvir-onment features and to investigate the roles of ZNF710-AS1-201 in the invasion and metastasis processes of GC cells.METHODS We obtained data from The Cancer Genome Atlas and Wujin Hospital.We assessed cell growth,migration,invasion,and programmed cell death using cell counting kit-8,EdU,scratch,Transwell,and flow cytometry assays.Quantitative real-time polymerase chain reaction(qRT-PCR)was used to identify the potential downstream targets of ZNF710-AS1-201.RESULTS In GC tissues with low ZNF710-AS1-201 expression,immunoassays detected significant infiltration of various antitumor immune cells,such as memory CD8 T cells and activated CD4 T cells.In the low-expression group,the half-maximal inhibitory concentrations(IC_(50)s)of 5-fluorouracil,cisplatin,gemcitabine,and trametinib were lower,whereas the IC_(50)s of dasatinib and vorinostat were higher.The malignant degree of GC was higher and the stage was later in the high-expression group.Additionally,patients with high expression of ZNF710-AS1-201 had lower overall survival and disease-free survival rates.In vitro,the overexpression of ZNF710-AS1-201 greatly enhanced growth,metastasis,and infiltration while suppressing cell death in HGC-27 cells.In contrast,the reduced expression of ZNF710-AS1-201 greatly hindered cell growth,enhanced apoptosis,and suppressed the metastasis and invasion of MKN-45 cells.The expression changes in ZNF710 were significant,but the corresponding changes in isocitrate dehydrogenase-2,Semaphorin 4B,ARHGAP10,RGMB,hsa-miR-93-5p,and ZNF710-AS1-202 were not consistent or statistically significant after overexpression or knockdown of ZNF710-AS1-201,as determined by qRT-PCR.CONCLUSION Immune-related lncRNA ZNF710-AS1-201 facilitates the metastasis and invasion of GC cells.It appears that ZNF710-AS1-201 and ZNF710 have potential as effective targets for therapeutic intervention in GC.Nevertheless,it is still necessary to determine the specific targets of the ZNF710 TF.

CD44v6 in peripheral blood and bone marrow of patients with gastric cancer as micro-metastasis

瞄准：为了检测 CD44 的表示，与能力相关在有胃的癌症并且到的病人的外部血和骨髓微转移推出它的临床的意义。方法：从有胃的癌症和 6 控制的 46 个病人的外科手术前的外部血和骨髓标本被 CD44v6mRNA 的半量的 RT-PCR 扩大学习。从有胃的癌症和 14 控制的 40 个病人的外科手术前、手术后的外部血标本被 CD44v6mRNA 的量的 RT-PCR 扩大在相应经期学习。结果：半量的 RT-PCR 扩大证明外部血和骨髓的那 CD44v6mRNA 表情在 39 是积极的(84.8%) 并且 40 (86.9%) 有胃的癌症的 46 个病人分别地。在外部血， CD44v6mRNA 表示为 diffuse 是积极的 32 个病人并且为 14 个病人的在 9 的肠的类型(64.3%) 的在 30 的类型(93.8%) 。在另一方面在骨髓， CD44v6mRNA 表示为 diffuse 是积极的 32 个病人并且为 14 个病人的在 10 的肠的类型(71.4%) 的在 31 的类型(96.9%) 。在弥漫的类型和肠的类型之间有有效差量。量的 RT-PCR 扩大证明 CD44v6mRNA 没在控制的外部血被表示， CD44v6mRNA 表示为在有胃的癌症的 40 个病人的外科手术前的外部血是积极的，从 4.9 x 10 的表示层次(8 )- 3.2 x 10 (11 ) copies/g RNA。在外部血的 CD44v6mRNA 的平均表示水平是 3.9 x 10 (10 ) copies/g RNA。在在在到 7.6 x 10 的从 5.5 x 10 增加的药品操作(6 )(9 ) 以后的胃的癌症病人的外部血的 CD44v6mRNA 的表示层次 copies/g RNA 和平均水平是 2.4 x 10 (8 ) copies/g RNA (图 3B )(P = 0.00496 ) 。在药品操作以后，表示水平显著地减少了。结论：为 CD44v6mRNA 的半量、量的 RT-PCR 扩大是为察觉的一个敏感、特定的方法在外部血和骨髓微转移，它可能被用作肿瘤负担和治疗学的效果的指示物。

miR-891a-5p及miR-383-5p与激素受体阳性早期乳腺癌术后发生远处转移的关系探讨

目的探讨微小RNAs(miRNAs,miR)-891a-5p及miR-383-5p与激素受体(HR)阳性早期乳腺癌术后发生远处转移的关系。方法62例HR阳性早期(T1~2N0M0期)乳腺癌患者,根据术后是否出现远处转移分为远处转移组(28例,出现远处转移)和未远处转移组(34例,未出现远处转移)。收集两组的临床乳腺癌标本,并检测组织的miRNAs表达水平。比较两组miR-891a-5p、miR-383-5p、miR-1295a表达水平,分析miR-891a-5p、miR-383-5p、miR-1295a对乳腺癌远处转移的诊断效能;比较两组miR-661、miR-296-3p、miR-128-3p表达水平,分析miR-891a-5p、miR-383-5p、miR-1295a表达水平与无远处转移生存率(DMFS)之间的关系。结果远处转移组miR-891a-5p、miR-383-5p、miR-1295a表达水平明显较未远处转移组减少,差异倍数分别为-2.519、-1.812和-1.443;远处转移组miR-891a-5p表达(1.099±0.899)明显低于未远处转移组的(2.768±2.194)(P<0.05)。miR-891a-5p低表达(<1.12)预测远处转移的敏感度和特异度分别为71.4%和82.4%,曲线下面积(AUC)为0.825(P=0.0000<0.01);miR-383-5p低表达(<1.15)预测远处转移的敏感度和特异度分别为53.4%和85.3%,AUC为0.738(P=0.0013<0.01);而miR-1295a低表达(<2.08)预测远处转移的敏感度和特异度分别为82.1%和50.0%,AUC仅为0.677(P=0.0175<0.05)。在诊断效能上,miR-891a-5p诊断乳腺癌远处转移的AUC、敏感度、阳性预测值、阴性预测值均优于miR-383-5p,miR-1295a诊断效能最差,表明miR-891a-5p、miR-383-5p低表达能预测HR阳性早期乳腺癌的远处转移。远处转移组的miR-661、miR-296-3p、miR-128-3p表达水平均低于未远处转移组,差异具有统计学意义(P<0.05)。62例患者的随访时间为59~131个月,中位随访时间为81个月。miR-891a-5p低表达患者的中位DMFS时间为48个月,5年DMFS仅为38.5%,低于miR-891a-5p高表达的86.1%(P<0.01)。miR-383-5p低表达患者的中位DMFS时间为52个月,5年DMFS为35.0%,低于miR-383-5p高表达的73.8%(P<0.01);miR-1295a低表达患者的中位DMFS时间为65个月,miR-1295a高、低表达患者的5年DMFS无明显差别(P>0.05)。结论miR-891a-5p、miR-383-5p有可能成为HR阳性乳腺癌的一个有价值的预后相关的生物标志物和治疗肿瘤的靶点。

Micro RNAs in colorectal cancer:Role in metastasis and clinical perspectives

Colorectal cancer(CRC)is the third most common malignancy and the third leading cause of cancer related deaths in the United States.Almost 90%of the patients diagnosed with CRC die due to metastases.Micro RNAs(mi RNAs)are evolutionarily conserved molecules that modulate the expression of their target genes post-transcriptionally,and they may participate in various physiological and pathological processes including CRC metastasis by influencing various factors in the human body.Recently,the role mi RNAs play throughout the CRC metastatic cascade has gain attention.Many studies have been published to link them with CRC metastasis.In this review,we will briefly discuss metastatic steps in the light of mi RNAs,along with their target genes.We will discuss how the aberration in the expression of mi RNAs leads to the formation of CRC by effecting the regulation of their target genes.As mi RNAs are being exploited for diagnosis,prognosis,and monitoring of cancer and other diseases,their high tissue specificity and critical role in oncogenesis make them new biomarkers for the diagnosis and classification of cancer as well as for predicting patients’outcome.Mi RNA signatures have been identified for many human tumors including CRC,and mi RNA-based therapies to treat cancer have been emphasized lately.These will also be discussed in this review.

Mutant p53 increases exosome-mediated transfer of mi R-21-3p and mi R-769-3p to promote pulmonary metastasis

Objective: Tumor metastasis is a complex, multistep process that depends on tumor cells and their communication with the tumor microenvironment. A p53 gain-of-function mutant has been shown to enhance the tumorigenesis, invasion, and metastasis abilities of tumor cells. This study aimed to investigate the roles of p53 R273 H mutation in the tumor microenvironment.Methods: The in vitro and in vivo effects of the p53 R273 H mutant on the invasion and metastasis of HCT116 cells were investigated. Exosomes from wild-type and HCT116-TP53(R273 H) cells were cocultured with mouse embryonic fibroblasts(MEFs). The roles of differentially expressed exosomal micro RNAs identified by microarray analysis were investigated. The functions of the p53 R273 H mutant in tumor cells were also investigated via gene expression microarray and quantitative polymerase chain reaction(q PCR) analyses.Results: Introducing p53 R273 H mutant into HCT116 cells significantly potentiated pulmonary metastasis in vivo. In the presence of exosomes derived from HCT116-TP53(R273 H) cells, the exosomes were taken up by MEFs and became activated. Microarray analysis showed that the p53 R273 H mutation increased the exosomal levels of mi R-21-3 p and mi R-769-3 p. Intriguingly, in clinical samples, mi R-21-3 p and mi R-769-3 p levels were significantly higher in patients with a p53 mutation than in those without this mutation. Furthermore, both mi R-21-3 p and mi R-769-3 p activated fibroblasts and exerted a synergistic effect via their target genes on the transforming growth factor-β(TGF-β)/Smad signaling pathway. The activated fibroblasts excreted cytokine TGF-β and may have reciprocally induced cancer cells to undergo epithelial-mesenchymal transition(EMT). Indeed, HCT116-TP53(R273 H) cells showed increased expression of ZEB1 and SNAI2 and decreased transcription of several cell adhesion molecules.Conclusions: The mutant p53-exosomal mi R-21-3 p/mi R-769-3 p-fibroblast-cytokine circuit appears to be responsible for communication between tumor and stromal cells, with exosomal mi RNAs acting as a bridge. mi R-21-3 p and mi R-769-3 p are potential predictive markers of pulmonary metastasis and candidate targets for therapeutic interventions.

Prostate cancer tends to metastasize in the bone-mimicking microenvironment via activating NF-κB signaling

Prostate cancer preferentially metastasizes to the bone. However, the underlying molecular mechanisms are still unclear. To explore the effects of a bone-mimicking microenvironment on PC3 prostate cancer cell growth and metastasis, we used osteoblast differentiation medium（ODM; minimal essential medium alpha supplemented with L-ascorbic acid） to mimic the bone microenvironment. PC3 cells grown in ODM underwent epithelial-mesenchymal transition and showed enhanced colony formation, migration, and invasion abilities compared to the cells grown in normal medium. PC3 cells grown in ODM showed enhanced metastasis when injected in mice. A screening of signaling pathways related to invasion and metastasis revealed that the NF-κB pathway was activated, which could be reversed by Bay 11-7082, a NF-κB pathway inhibitor. These results indicate that the cells in different culture conditions manifested significantly different biological behaviors and the NF-κB pathway is a potential therapeutic target for prostate cancer bone metastasis.

血清miR-145和miR-195在OSCC患者中的表达及其与颈部淋巴结转移的关系分析

目的 分析血清微小RNA(miR)-145和miR-195在口腔鳞状细胞癌(OSCC)患者中的表达及其与颈部淋巴结转移的关系。方法 选取2020年1月至2022年6月在该院确诊的102例OSCC患者为OSCC组,收集整理OSCC患者临床病理参数,根据是否发生颈部淋巴结转移将患者分为颈部淋巴结转移组43例和无颈部淋巴结转移组59例;同期选取79例癌前病变患者为癌前病变组,86例无口腔病变的体检健康者为健康对照组。采用实时荧光定量聚合酶链反应检测血清miR-145、miR-195相对表达水平;采用受试者工作特征曲线分析检验血清miR-145、miR-195相对表达水平对OSCC患者颈部淋巴结转移的评估价值。结果 OSCC组血清miR-145、miR-195相对表达水平低于癌前病变组、健康对照组,差异有统计学意义(P<0.05)。癌前病变组血清miR-145、miR-195相对表达水平低于健康对照组,差异有统计学意义(P<0.05)。肿瘤低分化、TNM分期Ⅲ+Ⅳ期的OSCC患者血清miR-145、miR-195相对表达水平低于肿瘤中/高分化、TNM分期Ⅰ+Ⅱ期的OSCC患者,差异有统计学意义(P<0.05)。颈部淋巴结转移组血清miR-145、miR-195相对表达水平低于无颈部淋巴结转移组,差异有统计学意义(P<0.05)。血清miR-145、miR-195相对表达水平单独及二者联合评估OSCC患者颈部淋巴结转移的曲线下面积分别为0.840(95%CI:0.765~0.915)、0.832(95%CI:0.754~0.910)、0.898(95%CI:0.841~0.956),特异度分别为79.1%、88.4%、77.5%,灵敏度分别为74.6%、67.8%、87.4%。结论 血清miR-145、miR-195在OSCC患者中低表达,且与OSCC患者颈部淋巴结转移、肿瘤分化程度、TNM分期有关,可作为评估OSCC患者颈部淋巴结转移的重要指标。

miR-186在宫颈癌中的研究进展

宫颈癌(CC)作为女性生殖系统中最常见的恶性肿瘤之一,其发生和发展涉及着多种调控机制。微小RNA(miRNA)作为一种非编码RNA,在转录后水平上调节基因的表达并起着重要作用。miRNA-186(miR-186)作为一种重要的miRNA,在CC中的异常表达与细胞的增殖、凋亡、侵袭等过程密切相关,并且在CC细胞对化疗的敏感性中起着调节作用。该文将对miR-186在CC发生和发展中的调控机制研究进展进行综述。

miR-9、miR-194在鼻咽癌组织中的表达及与其预后的关系

目的 探讨miR-9、miR-194在鼻咽癌组织中的表达水平变化及其预后价值。方法 选取鼻咽癌患者76例,随访3~36个月,根据预后情况分为死亡组(n=21例),存活组(n=55例)。统计比较miR-9、miR-194不同表达水平的鼻咽癌患者的临床资料,以及不同预后的鼻咽癌患者miR-9、miR-194表达水平,采用Logistic回归分析鼻咽癌患者预后相关影响因素。结果 76例鼻咽癌患者miR-9高表达29例,低表达47例,miR-194高表达35例,低表达41例;miR-9、miR-194低表达患者的临床分期为Ⅲ~Ⅳ期、肿瘤分期为T3~T4期、组织分化程度为高中分化、发生淋巴结转移及远处转移的比例高于miR-9、miR-194高表达患者(P<0.05);两组临床分期、肿瘤分期、组织分化程度、淋巴结转移及远处转移情况、miR-9表达水平、miR-194表达水平比较差异显著(P<0.05);临床分期、肿瘤分期、组织分化程度、淋巴结转移及远处转移情况、miR-9表达水平、miR-194表达水平为鼻咽癌患者预后影响因素(P<0.05)。结论 miR-9、miR-194低表达与鼻咽癌患者恶性生物学行为进程及预后有关,该研究提示miR-9、miR-194可能是鼻咽癌预后评估的有效分子靶点,值得临床进一步深入探究。

Mechanism of "Epimedium-Cistanche deserticola" in the treatment of breast cancer with bone metastasis

Objective:"Epimedium - Cistanche deserticola" is a kind of kidney tonifying drug commonly used in the treatment of breast cancer bone metastasis, which has good clinical effect, but the pharmacological mechanism has not been fully clarified. Methods: In this study, the network pharmacology and bioinformatics technology were used to explore the mechanism of "Epimedium - Cistanche deserticola" in the treatment of breast cancer bone metastasis. TCMSP, TCM database@Taiwan and TCMID databases were used to screen the main effective components of the drug. Swiss Target Prediction and STITCH databases were used to search the potential target of action of Epimedium and Cistanche deserticola. Genecards, OMIN and Drugbank databases were used to search the cause of bone metastasis of breast cancer. The target of action of the drug and the disease gene were mapped for GO and KEGG signal pathway analysis, A visualized network of "drug - component - target - signaling pathway" was constructed by using the software of Cytoscape 3.6.0, and the core genes were screened out. Results: The study found that there are 30 main effective components of Epimedium and Cistanche deserticola, and 544 genes are involved in the potential therapeutic targets, among which 101 genes are potential targets of Epimedium and Cistanche deserticola in the treatment of breast cancer bone metastasis. Through the analysis of GO and KEGG pathways, we found that the mechanisms involved in antitumor, osteoblast differentiation, osteoclast apoptosis and regulation of bone microenvironment, such as apoptosis, osteoclast differentiation, PI3K-Akt, HIF-1 signaling pathway, T cell receptor signaling pathway, etc. TP53, VEGFA, AKT1, EGFR, SRC, CCND1, MAPK3, ESR1 may be the key genes in the treatment of breast cancer bone metastasis. Conclusion: In this study, the network of "drug - component - target- signaling pathway" was constructed through network pharmacology, and it was found that the mechanism of "Epimedium - Cistanche deserticola" in the treatment of breast cancer bone metastasis involves multiple targets and pathways, which is conducive to guiding clinical medication.

Mechanism of lncRNA SNHG19 miR-299-5p MAPK6 signaling axis promoting metastasis of non-small cell lung cancer cells

Objective The aim of this study was to explore the mechanism behind lncRNA small nucleolar RNA host gene 19(lncRNA SNHG19)/microrNA-299-5P(miR-299-5p)/mitogen-activated protein kinase 6(MAPK6)signaling axis promoting metastasis of non-small cell lung cancer(NSCLC).Methods To analyze the abnormal expression of lncRNAs in NSCLC,50 surgically resected NSCLC and adjacent tissue samples were collected from August 2021 to August 2022.The mRNA expression levels of lncRNA SNHG19,Mir-299-5p,and MAPK6 were detected by qRT-PCR.The functions of lncRNA SNHG19,Mir-299-5p and MAPK6 were investigated by CCK-8,clone formation,EdU,scratch,Transwell western blotting(WB)and in vivo xenograft assay.RNA fluorescence in-situ hybridization(FISH),RNA pull-down,dual luciferase reporter,and RNA co-immunoprecipitation assays were used to explore the mechanism of action between lncRNA SNHG19,miR-299-5p,and MAPK6.Results High expression of lncRNA SNHG19 was correlated with poor prognosis,tumor size,lymph node metastasis,and TNM stage in NSCLC patients(P<0.05).Cell function experiments showed that lncRNA SNHG19 could improve the proliferation,clone formation,migration,and invasion ability of A549 cells both in vitro and in vivo(all P<0.05)and increased the relative expression levels of vimentin and MAPK6(P<0.05).The relative expression level of E-cadherin was decreased(P<0.05).lncRNA SNHG19 can interact with Mir-299-5p and regulate the expression level of MAPK6.Conclusion lncRNA SNHG19 is upregulated in NSCLC tissues and cells,and its high expression is associated with tumor progression and poor survival.Moreover,it can act as a molecular sponge for Mir-299-5p to regulate MAPK6 expression and promote the proliferation and metastasis of A549 cells.

5-羟色胺转运蛋白显像剂^(11)C-DASB的自动化合成及Micro PET/CT显像

目的:自动化合成5-羟色胺转运蛋白显像剂11 C-DASB并进行大鼠Micro PET/CT显像;方法:通过改变甲基化试剂、溶解前体溶剂及反应条件,得到优化的标记条件作为碳-11多功能合成模块的输入参数,进行自动化合成11 C-DASB,大鼠静脉注射11 C-DASB 45 min后进行显像;结果:采用11 C-CH3-Triflate作为甲基化试剂,通入新配制的含1mg去甲基DASB前体的500μL DMSO溶液内,80℃下加热2min,标准率为63.7%,大鼠显像表明,11 C-DASB特异性的浓聚于SERT富集区域;结论:经优化,11 C-DASB自动化合成可得到较高产率,大鼠显像表明,其特异性浓聚于SERT富集区域,有望作为5-羟色胺转运蛋白显像剂。

^(18)F-氟赤硝基咪唑micro PET/CT评价裸鼠乳腺癌早期放疗疗效实验研究

目的探讨^(18)F-氟赤硝基咪唑micro PET/CT评价裸鼠MDA-MB231乳腺癌早期放疗疗效的价值。方法建立16只裸鼠MDA-MB231乳腺癌模型,将其按照随机对照原则分为两组:对照组(A组)、放疗组(B组),每组8只。每组裸鼠行micro PET/CT显像,测定每只裸鼠肿瘤SUVmax值。完成显像后,常规HE染色观察每组肿瘤组织形态学特征,免疫组化方法测定每组肿瘤细胞乏氧诱导因子-1α(HIF-1α)的表达情况。结果放疗前,对照组与放疗组SUVmax值差异无统计学意义(t=0. 375,P> 0. 05)。放疗组放疗后48 h裸鼠肿瘤组织SUVmax值较放疗前(t=9. 958,P <0. 05)、放疗后24 h(t=16. 506,P <0. 05)明显降低,差异有统计学意义(F=58. 860,P <0. 05)。放疗后24 h SUVmax值也低于放疗前24 h(t=5. 405,P <0. 05),差异有统计学意义。HE染色结果显示放疗组肿瘤细胞坏死较对照组更加明显。免疫组化结果显示放疗组放疗后HIF-1α表达阳性率明显低于放疗前(t=14. 802,P <0. 05),差异具有统计学意义。相关性分析结果显示肿瘤SUVmax与HIF-1α的表达呈明显正相关性(r=0. 865,P <0. 05)。结论^(18)F-氟赤硝基咪唑micro PET/CT可以监测肿瘤内部的乏氧状态,并且可以评价裸鼠MDA-MB231乳腺癌的早期放疗疗效。

microRNA-29c对人胰腺癌细胞侵袭转移的抑制作用及机制

目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系中microRNA-29c的表达差异,以microRNA-29c过表达腺病毒感染的PANC-1和MIA Pa Ca2细胞作为实验组,以空载体感染的PANC-1和MIA Pa Ca2细胞作为阴性对照组,采用细胞划痕实验、Transwell法检测两组细胞体外侵袭能力,Western blot检测两组细胞上皮间充质转化(EMT)相关蛋白波形蛋白(Vimentin)及E-钙粘蛋白(E-cadherin)的表达。结果:real-time-PCR显示各胰腺癌细胞系中microRNA-29c水平明显低于正常胰腺细胞系(P<0.05),细胞划痕实验发现感染腺病毒48 h后实验组PANC-1、MIA Pa Ca-2细胞的迁移距离明显短于阴性对照组(P<0.05),Transwell小室细胞侵袭实验发现实验组PANC-1和MIA Pa Ca-2细胞侵袭数量明显低于阴性对照组(P<0.05);Western blot蛋白免疫印迹结果显示PANC-1和MIA Pa Ca-2细胞过表达microRNA-29c后,Vimentin表达减少,E-cadherin表达增加。结论:microRNA-29c的过表达可有效抑制胰腺癌细胞的体外侵袭与转移,可能与Vimentin表达减少,E-cadherin表达增加有关,有望成为胰腺癌生物治疗的潜在靶点。

Unexpected metastasis of intraductal papillary neoplasm of the bile duct without an invasive component to the brain and lungs:A case report

BACKGROUND Despite an expanding number of studies on intraductal papillary neoplasm of the bile duct(IPNB),distant metastasis remains unexplained especially in cases of carcinoma in situ.In the present study,we report a rare and interesting case of IPNB without invasive components that later metastasized to lungs and brain.CASE SUMMARY A 69-year-old male was referred to our hospital due to suspected cholangiocarcinoma.Laboratory tests on admission reported a mild elevation of alkaline phosphatase,γ-glutamyl transpeptidase,and total bilirubin in serum.Endoscopic retrograde cholangiography revealed a filling defect in the common bile duct(CBD)extending to the left hepatic duct.Peroral cholangioscopy delineated a tumor in the CBD that had a papillary pattern.Multidetector computed tomography and magnetic resonance cholangiopancreatography detected partial blockage ot interlude in the CBD leading to cholestasis without evidence of metastasis.Therefore,a diagnosis of IPNB cT1N0M0 was established.Left hepatectomy with bile duct reconstruction was performed.Pathological examination confirmed an intraepithelial neoplasia pattern without an invasive component and an R0 resection achievement.The patient was monitored carefully by regular examinations.However,at 32 mo after the operation,a 26 mm tumor in the lungs and a 12 mm lesion in the brain were detected following a suspicious elevated CA 19-9 level.Video-assisted thoracoscopic surgery of left upper lobectomy and stereotactic radiotherapy are indicated.In addition to histopathological results,a genomic profiling analysis using whole exome sequencing subsequently confirmed lung metastasis originating from bile duct cancer.CONCLUSION This case highlights the important role of genomic profiling analysis using whole exome sequencing in identifying the origin of metastasis in patients with IPNB.

Multi-modality measurement and comprehensive analysis of hepatocellular carcinoma using synchrotron-based microscopy and spectroscopy

The visualization and data mining of tumor multidimensional information may play a major role in the analysis of the growth,metastasis,and microenvironmental changes of tumors while challenging traditional imaging and data processing techniques.In this study,a general trans-scale and multi-modality measurement method was developed for the quantitative diagnosis of hepatocellular carcinoma(HCC)using a combination of propagation-based phase-contrast computed tomography(PPCT),scanning transmission soft X-ray microscopy(STXM),and Fourier transform infrared micro-spectroscopy(FTIR).Our experimental results reveal the trans-scale micro-morpho-logical HCC pathology and facilitate quantitative data analysis and comprehensive assessment.These results include some visualization features of PPCT-based tissue microenvironments,STXM-based cellular fine structures,and FTIR-based bio-macromolecular spectral characteris-tics during HCC tumor differentiation and proliferation.The proposed method provides multidimensional feature data support for constructing a high-accuracy machine learning algorithm based on a gray-level histogram,gray-gradient co-occurrence matrix,gray-level co-occurrence matrix,and back-propagation neural network model.Multi-dimensional information analysis and diagnosis revealed the morphological pathways of HCC pathological evolution and we explored the relationships between HCC-related feature changes in inflammatory microenviron-ments,cellular metabolism,and the stretching vibration peaks of biomolecules of lipids,proteins,and nucleic acids.Therefore,the proposed methodology has strong potential for the visualization of complex tumors and assessing the risks of tumor differentiation and metastasis.

Micro RNA-331 inhibits development of gastric cancer through targeting musashi1

BACKGROUND The molecular mechanisms involved in micro RNAs(mi RNAs)have been extensively investigated in gastric cancer(GC).However,how mi R-331 regulates GC pathogenesis remains unknown.AIM To illuminate the effect of mi R-331 on cell metastasis and tumor growth in GC.METHODS The q RT-PCR,CCK8,Transwell,cell adhesion,Western blot,luciferase reporter and xenograft tumor formation assays were applied to explore the regulatory mechanism of mi R-331 in GC.RESULTS Downregulation of mi R-331 associated with poor prognosis was detected in GC.Functionally,mi R-331 suppressed cell proliferation,metastasis and tumor growth in GC.Further,mi R-331 was verified to directly target musashi1(MSI1).In addition,mi R-331 inversely regulated MSI1 expression in GC tissues.Furthermore,upregulation of MSI1 weakened the inhibitory effect of mi R-331 in GC.CONCLUSION mi R-331 inhibited development of GC through targeting MSI1,which may be used as an indicator for the prediction and prognosis of GC.

Lv-shRNA-Hsa-microRNA-691慢病毒表达载体的构建与鉴定

目的构建Lv-shRNA-hsa-microRNA-691慢病毒表达载体。方法 PCR扩增pri-miR-691-2前体序列,克隆至plenti-GFP慢病毒表达载体;双酶切及测序鉴定正确后进行慢病毒包装与滴度检测。构建成功后感染人胰腺癌细胞Panc-1,48h后Real-time Q-PCR检测miR-691的表达。结果酶切、测序鉴定证明插入序列正确,测定病毒滴度为1×109TU/m L,病毒感染48h后的Panc-1胰腺癌细胞在倒置荧光显微镜下观察可见绿色荧光,Real-time Q-PCR显示被感染细胞的miR-691表达量较未感染细胞显著增高。结论建立了高效稳定表达Lv-shRNA-hsa-miR-691的慢病毒转染系统。

Effect of Surface Roughness in Micro-nano Scale on Slotted Waveguide Arrays in Ku-band

Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and efficiency of the SWA in Ku-band. Firstly, the roughness is simulated using the electromechanical coupled（EC） model. The relationship between roughness and the antenna＇s radiation properties is obtained. For verification, an antenna proto- type is manufactured and tested, and the simulation method is introduced. According to the prototype, a contrasting experiment dealing with the flatness of the radiating plane is conducted to test the simulation method. The advantage of the EC model is validated by comparisons of the EC model and two classical roughness models （sine wave and fractal function）, which shows that the EC model gives a more accurate description model for roughness, the maxi- mum error is 13%. The existence of roughness strongly broadens the beamwidth and raises the side-lobe level of SWA, which is 1.2 times greater than the ideal antenna. In addition, effect of the EC model＇s evaluation indices is investigated, the most affected scale of the roughness is found, which is 1/10 of the working wavelength. The proposed research provides the instruction for antenna designing and manufacturing.

犬累-卡-佩斯病的组织形态学观察

本试验旨在对临床上患累-卡-佩斯病犬的股骨头组织形态学进行观察,对该病的组织病理学变化进行描述。收集中国农业大学动物医院患有累-卡-佩斯病并采取手术切除治疗的犬的股骨头以及正常犬的股骨头,对其进行大体观察,Micro-CT观察股骨头三维微观结构,取股骨头负重区组织进行H.E.染色、甲苯胺蓝染色观察病理变化,扫描电镜观察各组股骨头骨显微结构变化。结果显示,病变组较正常组股骨头结构破坏严重,组织结构疏松、易于凿切,髓腔脂肪细胞增大增多,骨小梁在塌陷、溶解的同时,伴有新小梁骨的形成。