长链非编码RNA核富集转录体1促进喉鳞状细胞癌细胞迁移和侵袭的机制研究

目的 探究长链非编码RNA(lncRNA)核富集转录体1(NEAT1)NEAT1对喉鳞状细胞癌(LSCC)细胞迁移和侵袭的影响,并进一步分析miR-429/锌指E-盒结合同源异形盒1(ZEB1)轴在其中发挥的作用。方法 慢病毒转染建立稳定敲减lncRNA NEAT1的LSCC细胞,通过RT-qPCR检测细胞lncRNA NEAT1表达以验证转染效率,通过Transwell实验检测细胞迁移和侵袭能力,通过Western blot检测细胞上皮-间充质转化(EMT)相关蛋白N-cadherin、Vimentin、Slug和Snail表达。通过生物信息学分析miR-429与lncRNA NEAT1和ZEB1 mRNA间的潜在结合位点,并通过双荧光素酶报告基因实验验证miR-429与lncRNA NEAT1以及miR-429与ZEB1 mRNA结合。将miR-429抑制剂转染敲减lncRNA NEAT1的LSCC细胞,通过Western blot检测细胞ZEB1表达。进一步检查敲减ZEB1对抑制miR-429的敲减lncRNA NEAT1的LSCC细胞迁移、侵袭和EMT的影响。结果 敲减lncRNA NEAT1降低LSCC细胞lncRNA NEAT1表达,抑制细胞迁移和侵袭并下调细胞N-cadherin、Vimentin、Slug和Snail表达。miR-429与lncRNA NEAT1和ZEB1 mRNA间存在潜在结合位点,且miR-429与lncRNA NEAT1以及miR-429与ZEB1 mRNA结合。抑制miR-429逆转了敲减lncRNA NEAT1对LSCC细胞ZEB1表达的抑制作用。此外,敲减ZEB1逆转了抑制miR-429对敲减lncRNA NEAT1的LSCC细胞迁移和侵袭的促进作用及EMT相关蛋白N-cadherin、Vimentin、Slug和Snail表达的上调作用。结论 lncRNA NEAT1促进LSCC细胞迁移和侵袭,其机制可能与海绵化miR-429上调ZEB1表达促进LSCC细胞EMT有关。     

喉鳞癌组织Fas和FasL蛋白表达及临床意义

目的 :探讨Fas、FasL蛋白在喉鳞癌 (LSCC)组织中的表达及意义。方法 :采用SABC免疫组化法检测 4 2例LSCC及 2 0例手术切缘正常组织中Fas及FasL ,并与LSCC病理分级、临床分期及颈淋巴结转移相比较。结果 :Fas及FasL在LSCC中阳性率分别为 4 7.6 %和 6 4 .3% ,与在正常喉组织阳性率 90 .0 %和 2 0 .0 %相比 ,差异有显著性意义 (P <0 .0 5 )。Fas阳性率与肿瘤分级分期无显著相关性 (P >0 .0 5 ) ,与肿瘤转移有关 (P <0 .0 5 ) ;FasL阳性率与肿瘤分级、分期及转移密切相关 (P <0 .0 5 )。Fas与FasL的表达无显著相关性。结论 :Fas及FasL表达异常可能参与喉鳞癌的发生和发展 ;检测Fas与FasL可望作为判定喉鳞癌预后的潜在指标。     

p73和PCNA的表达与喉鳞状细胞癌的预后

目的：探讨喉鳞状细胞癌（LSCC）中p73、增殖细胞核抗原（PCNA）基因的表达与患者临床、病理参数和预后的关系。方法：采用免疫组织化学SABC技术检测65例LSCC组织及23例癌旁组织中p73、PCNA基因的表达情况。结果：p73、PCNA蛋自在65例LSCC组织中的表达水平较23例癌旁组织明显增强（均P〈0．05）。65例LSCC组织中,p73蛋自在TNM分期Ⅲ～Ⅳ期、远处转移及复发患者中的表达水平较Ⅰ～Ⅱ期、无转移及初发患者表达增强（P〈O．05）。PCNA蛋自在TNM分期Ⅲ～Ⅳ期患者、低分化癌、复发患者和有颈淋巴结转移及远处转移患者中的表达水平较Ⅰ～Ⅱ期、高中分化、初发患者和无转移患者中的表达增强（P〈O,05）。PCNA蛋白的表达与患者预后明显相关。经Cox比例风险模型进行分析,PCNA表达是患者预后不良的重要指标（其相对危险度RR=2.43,P〈0．05）。LSCC组织中p73、PCNA的基因表达存在正相关性（P〈0、05）。结论：p73蛋自在LSCC的发生、发展过程中可能扮演了癌基因的角色。PCNA蛋白的表达与LSCC的危险性存在密切关系,可作为判断LSCC患者预后的重要指标。LSCC中p73、PCNA的表达存在正相关关系。     

整合素连接激酶mRNA的表达与喉鳞状细胞癌相关性研究

目的:探讨整合素连接激酶(ILK)与喉鳞状细胞癌(LSCC)发生、发展的关系。方法:应用RT-PCR方法,检测64例LSCC标本(LSCC组)和10例正常喉黏膜组织(对照组)中ILK mRNA的表达。结果:LSCC组ILK mRNA表达(0.644±0.098)明显高于对照组(0.032±0.026),差异有统计学意义(P<0.05);ILK mRNA在有淋巴结转移组织中的表达(0.867±0.247)明显高于无淋巴结转移组织(0.389±0.199),差异有统计学意义(P<0.05)。随着LSCC临床T分期的发展,ILK mRNA的表达均相应升高,但相邻两组间差异无统计学意义(均P>0.05)。结论:ILK的高表达对LSCC的形成和发展起重要作用;ILK mRNA高表达与LSCC淋巴结转移密切相关,提示ILK可能成为预测LSCC转移和预后的生物学指标。     

Risk factors and survival outcomes of laryngeal squamous cell carcinoma patients with lung metastasis: A population-based study

ObjectiveIt remains elusive which factors may influence the morbidity and mortality of lung metastasis (LM) in Laryngeal Squamous Cell Carcinoma (LSCC) patients. The aim of the present study was to investigate factors influencing LM and the survival outcomes of LSCC patients with LM.MethodsWe identified 10,935 patients with LSCC from 2010 to 2014 using the Surveillance, Epidemiology and End Results database. Multivariate logistic regression analysis was used to determine the factors associated with the presence of LM. Multivariate cox regression analysis was used to identify covariates associated with increased all-cause mortality in patients with LM.ResultsAmong 10,935 patients with LSCC, 232 (2.12%) patients had LM. The median survival time of patients with LM was 8 months, and 8.37% of patients survived after 3 years. Patients with age ≥ 60 years old, unmarried status, supraglottis, overlapping lesion of larynx, subglottis, pathological grade III, T4 stage, N1 stage, N2 stage, N3 stage and bone, brain or liver metastases were more likely to have LM. Survival analysis showed that chemotherapy and radiotherapy suggested better survival of LSCC patients with LM while pathological grade IV was associated with an increased all-cause mortality.ConclusionThe incidence of LSCC patients with LM varied by age, married status, and tumor subtypes. LSCC patients with LM had poor survival, and only 8.37% of patients survived after 3 years. However, chemotherapy and radiotherapy were found as independent favorable prognostic factors for survival.     

Expression of MAGE-A1, -A9, -A11 in laryngeal squamous cell carcinoma and their prognostic significance: a retrospective clinical study

Conclusion The melanoma-associated antigens A1, -A9, -A11 (MAGE-A1, -A9, -A11) are relatively tumor-specific in laryngeal squamous cell carcinoma (LSCC), and could be ideal antigens for LSCC immunotherapy. In addition, MAGE-A9 probably is a poor prognostic marker for LSCC patients. Objective The MAGE-A family belongs to Cancer/testis antigens (CTA). However, the expression pattern of MAGE-A1, MAGE-A9, and MAGE-A11 in LSCC is still unclear. This study aims to evaluate the expression and possible prognostic role of MAGE-A1, MAGE-A9, and MAGE-A11 in LSCC patients. Methods The expression of MAGE-A1, MAGE-A9, and MAGE-A11 in LSCC specimens was investigated by immunohistochemistry, and the association of their expression and the clinical parameters and the survival of LSCC patients were analyzed by chi-square test, Kaplan-Meier survival and Cox regression analysis. Results The expression rates of MAGE-A1, MAGE-A9, and MAGE-A11 in LSCC were 54.7%, 46.2%, and 51.9%, respectively. The expression of MAGE-A1, MAGE-A9, and MAGE-A11 in LSCC was correlated with clinical stage, lymph node metastasis, and tumor size. The overall survival of LSCC patients with positive MAGE-A1, MAGE-A9, or MAGE-A11 expression was lower than the patients without MAGE-A1, MAGE-A9, or MAGE-A11 expression. Cox’s multivariable analysis showed that MAGE-A9 expression was an independently poor prognostic factor for LSCC patients.     

G3BP在喉鳞状细胞癌的表达及其临床意义

目的研究GTP酶激活蛋白SH3功能区结合蛋白（G3BP）在喉鳞癌组织中的表达情况及其与喉鳞癌生物学行为之间的关系。方法采用免疫组织化学方法检测91例喉鳞癌组织中G3BP的表达情况,并探讨他们与喉鳞癌的肿瘤组织分化程度、TNM分期、淋巴结转移和预后的关系。结果G3BP在喉鳞癌的阳性表达率为84.7％。其表达水平与肿瘤分化程度（P=0.008）、临床分期（P=0.005）、淋巴结转移（P=0.000）及肿瘤复发转移（P=0.000）均有密切关。G3BP表达水平越高,患者术后生存时间越短（P=0.000）。结论G3BP在喉鳞癌表达与肿瘤分化程度、临床分期、淋巴结转移、肿瘤复发转移情况及患者的预后有密切关系。G3BP可作为判断喉鳞癌患者预后的有效参考指标。     

Clinical significance of neuropilin-2 expression in laryngeal squamous cell carcinoma

PurposeThe purpose of the study is to evaluate the expression of NRP-2 and explore its role in Laryngeal squamous cell carcinoma (LSCC).Materials and methodsNRP-2 expression in 70 primary LSCC tissue specimens were analyzed by immunohistochemistry and correlated with clinicopathological parameters and patients´ survival rate. Additionally, 9 paired LSCC tissues were evaluated for NRP-2 expression by Western blotting.ResultsThe Western blotting indicated that NRP-2 expression levels in LSCC were significantly higher than those in the paraneoplastic tissues (P < 0.05). Immunohistochemistry staining revealed that NRP-2 was detected in all primary tumor samples, moreover, high expression of NRP-2 was significantly correlated with TNM stage (P < 0.05), clinical stage (P < 0.05), histological classification (P < 0.05), lymph node metastasis (P < 0.05) and recurrence (P = 0.001). Survival curves determined by the Kaplan-Meier method showed that high expression of NRP-2 can reduce overall survival (both group P < 0.05). Then we combined the NRP-2 expression and lymph node status, and Kaplan–Meier survival showed patients with high expression of NRP-2 or lymph node metastasis (+) had both shorter disease-free and overall survival than others (both P < 0.05). Multivariate Cox proportional hazards model analysis confirmed that histological grade (P = 0.045), lymph node metastasis (P = 0.020) and high expression of NRP-2 (P = 0.033) were statistically significant, independent predictor of prognosis.ConclusionsNRP-2 may contribute to LSCC progression and represents as a novel prognostic indicator as well as a potential therapeutic target for LSCC.     

下咽鳞状细胞癌组织claudin-1的表达及与微淋巴管生成的关系

目的 通过检测97例下咽鳞状细胞癌患者癌组织中claudin-1与D2-40蛋白的表达,分析claudin-1与微淋巴管密度(MLVD)之间的相互关系,探讨它们与肿瘤临床分期、病理学分级及患者临床预后之间的相关性,探索下咽鳞状细胞癌淋巴结转移的机制.方法 应用免疫组化法检测97例下咽鳞状细胞癌及90例癌旁组织标本中cl...     

The role of long non-coding RNA HOTAIR in the progression and development of laryngeal squamous cell carcinoma interacting with EZH2

Conclusions: The aberrant expression of long non-coding RNA HOTAIR and transmethylase EZH2 played important roles in the progression and development of laryngeal squamous cell carcinoma (LSCC).

Objectives: This research was aimed to explore the expression and correlation with clinicopathological characteristics of HOTAIR and EZH2 in LSCC, and to evaluate the function of the two in regulating the proliferation and cis-platinum resistance processes of LSCC.

Methods: Quantitative real time-PCR (qPCR) was conducted to measure the expression of HOTAIR and EZH2 in tissue samples. Clinicopathological features were collected and statistically analyzed combining with the expression of HOTAIR and EZH2. The variance of EZH2 with down-regulating HOTAIR was measured by qPCR. CCK-8 proliferation test was conducted to detect the proliferation feature in LSCC cells. After cultured with a series of cis-platinum concentrations for 24?h, cell viability was detected using CCK-8 assay, and the inhibition rates were calculated.

Results: HOTAIR and EZH2 were over-expressed in LSCC tissue. The higher expression was significantly related to T phase, pathological grades, and risk of lymphatic metastasis of LSCC. Suppressing HOTAIR expression stimulated EZH2 expressing, promoted the proliferation of AMC-HN8 cells, and increased the sensitivity to cis-platinum of the LSCC cells.     

Silencing SIX1 inhibits epithelial mesenchymal transition through regulating TGF-β/Smad2/3 signaling pathway in papillary thyroid carcinoma

ObjectiveTo investigate the sineoculis homeobox homolog 1 (SIX1) affect the epithelial mesenchymal transition (EMT) in papillary thyroid carcinoma (PTC) through regulating TGF-β/Smad2/3 signaling pathway.MethodsThe SIX1 expression in cytological specimens, tissues or PTC cell lines was detected by qRT-PCR, western blotting or immunohistochemistry. A series of vitro experiments including flow cytometry, CCK-8, wound-healing and Transwell were used to evaluate the biological characteristics in a PTC cell line (NPA cells), which were divided into Blank, Negative control (NC), SIX1, SIX1-siRNA, LY-364947 (TGF-β/Smad2/3 pathway inhibitor) and SIX1 + LY-364947 groups. TGF-β/Smad2/3 pathway and EMT related protein expression were measured by qRT-PCR and western blotting.ResultsSIX1 mRNA expression was increased in cytological specimens from PTC patients as compared with the non-toxic nodular goitre (NTG) patients. Moreover, compared with adjacent normal tissues, expressions of SIX1, N-cadherin and Vimentin were higher while E-cadherin was lower in PTC tissues; and SIX1 was positively correlated with N-cadherin and Vimentin but was negatively correlated with E-cadherin. Furthermore, the SIX1 expression was associated with histopathology, extrathyroidal extension (ETE), lymph node metastasis (LNM), pT stage, TNM stage, and distant metastasis. In addition, the expressions of TGFβ1, p-SMAD2/3, N-cadherin and Vimentin were downregulated in NPA cells after LY-364947 treatment with upregulated E-cadherin, decreased cell proliferation and metastasis, and enhanced cell apoptosis, which was reversed by SIX1 overexpression.ConclusionSilencing SIX1 can inhibit TGF-β/Smad2/3 pathway, thereby suppressing EMT in PTC, which may be a novel avenue for the treatment of PTC.     

The clinical significance of methylation of MAGE-A1 and-A3 promoters and expression of DNA methyltransferase in patients with laryngeal squamous cell carcinoma

PurposeAbnormal DNA methylation plays an important role in clinical diagnosis and prognosis of various tumors. DNA methylation is catalyzed by DNA methyltransferase (DNMT). However, the methylation status of MAGE-A1 and MAGE-A3 promoter regions in LSCC is unclear. To investigate the methylation levels of MAGE-A1, -A3 in LSCC and corresponding normal tissues. The expression of DNMTs (DNMT1, DNMT3a and DNMT3b) in LSCC and the relationship between the methylation status of MAGE-A1, -A3 were analyzed.Materials and methodsWe examined methylation status of MAGE-A1, -A3 in LSCC by using MSP. Meanwhile, the expression level of DNMTs in LSCC was detected by immunohistochemistry. And further analysis the correlation between DNMTs expression level and methylation status of MAGE-A1 and MAGE-A3.ResultsThe unmethylation rate of MAGE-A1, -A3 were 39.62% and 46.23%. The expression of DNMTs was 33.02% to 37.74%. The level of demethylation of MAGE-A1 and MAGE-A3 were negative related to DNMTs protein. MAGE-A1 and MAGE-A3 unmethylation status and DNMT3a expression were independent prognostic factors for LSCC.ConclusionsThe DNMTs may participate in the methylation process of MAGE-A1 and MAGE-A3, which may play an important role in the occurrence and development of LSCC.     

喉鳞状细胞癌中脆性组氨酸三联体基因启动子甲基化及其蛋白的表达

目的：探讨喉鳞状细胞癌(LSCC)组织中脆性组氨酸三联体(FHIT)基因启动子甲基化状态及与FHIT蛋白表达的关系。方法：采用PCR-based酶切甲基化及免疫组织化学SP技术,检测41例LSCC及其相对应的喉正常粘膜(NSE)中FHIT基因启动子甲基化状态及其蛋白表达。结果：在NSE组中,无一例出现FHIT基因启动子甲基化,而在LSCC组中,有24．4％(10／41)出现甲基化,且甲基化状态与病理分级及淋巴结转移有关(P＜O．01);NSE组及LSCC组FHIT蛋白阳性率分别为100．0％(41／41)和46．3％(19／41),且与肿瘤TNM分期及淋巴结转移有关(P＜O．05);FHIT基因启动子甲基化与蛋白阳性表达有明显的相关性(P＜O．01)。结论：FHIT基因启动子甲基化是其基因失活的重要机制之一,在LSCC的发生、发展中起重要作用。     

Evaluation of microRNA expression profiling in highly metastatic laryngocarcinoma cells

Abstract

Background: Until now, little is known about the role of miRNAs in the invasion and metastasis of Laryngeal squamous cell carcinoma (LSCC).

Objectives: This study aimed to explore the relationship between microRNA and the invasion and metastasis of LSCC.

Material and methods: The highly metastatic laryngocarcinoma cells were obtained from the established animal model with spontaneous lymph node metastasis of LSCC in our previous study. MicroRNA expression profiling and bioinformatic analysis were performed to analyze the microRNA expression changes in the highly metastatic laryngocarcinoma cells and the parental tumor cells (HEP-2). RT-PCR was performed for further validation of the result of microarray.

Results: A total of 40 microRNAs were found to be significantly altered in the highly metastatic laryngocarcinoma cells compared to controls. Bioinformatic analysis identified that 19?key microRNAs might involve in LSCC development. Moreover, RT-PCR confirmed that miR-25, miR-100, miR-125b-5p and let-7g were differentially expressed in different laryngocarcinoma cells and human tumor specimens.

Conclusions and significance: Our findings suggest that microRNA play an important role in the invasion and metastasis of LSCC, and provide the clues for studying the function of microRNA as well as opportunities to analyze the complex molecular abnormalities driving LSCC progression.     

Skp2、p27蛋白在喉鳞状细胞癌中的表达及意义

目的:探讨喉鳞状细胞癌(LSCC)中Skp2和p27蛋白的表达与患者临床病理和预后的关系以及两种蛋白之间的相关性。方法:用免疫组织化学SP法检测20例正常喉黏膜(NLT)、27例LSCC癌前病变不典型增生(LPL)和70例LSCC组织中Skp2和p27蛋白的表达情况。结果:Skp2蛋白在NLT、LPL和LSCC中的阳性表达率分别为10.00%(2/20),37.04%(10/27)和41.43%(29/70),后两者的阳性率显著高于前者(均P<0.05)。Skp2蛋白表达与临床分期及淋巴结转移显著正相关(P<0.05)。p27蛋白在NLT和LSCC中阳性率分别为85.00%(17/20),48.57%(34/70),两者比较,差异有统计学意义(P<0.01)。p27蛋白表达与颈淋巴结转移呈负相关(P<0.05)。Skp2蛋白在LSCC中表达与p27蛋白呈负相关(P<0.05)。Skp2表达阳性而p27表达阴性的LSCC患者生存率明显低于其他患者(P<0.05)。结论:Skp2可能通过对细胞周期抑制因子p27蛋白的降解而参与LSCC的发生、发展,联合检测Skp2及p27蛋白的表达对预测LSCC患者的预后具有重要意义。     

CD44v6和MMP-9在喉鳞状细胞癌组织中的表达及意义

目的:研究喉鳞状细胞癌(LSCC)组织中细胞黏附分子CD44变构体6(CD44v6)和基质金属蛋白酶-9(MMP-9)的表达情况及临床意义。方法:应用免疫组织化学SABC法测定27例LSCC组织及8例癌旁正常喉黏膜组织中CD44v6和MMP-9的表达,并分析CD44v6和MMP-9表达与LSCC浸润、转移和预后的关系。结果:CD44v6和MMP-9在LSCC组织中均过度表达。CD44v6表达与LSCC病理分化程度、颈淋巴结转移及术后5年生存率有关(均P<0.05);MMP-9表达与LSCC颈淋巴结转移、临床分期及T分期有关(均P<0.05)。LSCC组织中CD44v6和MMP-9的表达呈显著正相关(均P<0.01)。结论:LSCC组织中CD44v6和MMP-9的表达密切相关。CD44v6和MMP-9的表达可作为临床上判断LSCC浸润、淋巴结转移及评估预后的客观指标。     

c-fos癌基因在喉鳞癌组织中的表达

目的 探讨c—fos癌基因在喉鳞癌(LSCC)组织中的表达及意义。方法 采用SABC免疫组化法检测42例LSCC及10例手术切缘正常组织中c—fos表达,并与LSCC发生部位、病理分级、临床分期及有无颈淋巴结转移相比较。结果 c—foS在LSCC中阳性率为69.0％,正常喉组织阳性率为10.0％,两者比较有统计学意义(P<0.05)。c—fos阳性率与肿瘤分级密切相关(P<0.05),但与肿瘤发生部位、分期及转移比较,两者比较有统计学意义(P>0.05)。结论 c—fos表达异常可能与喉鳞癌的发生有关。检测c—fos可作为判定喉鳞癌恶性程度的潜在指标之一。抗c—fos可能为肿瘤治疗提供一个新途径。     

CHD1L通过EMT促进喉鳞状细胞癌细胞的增殖、侵袭和转移

目的 探讨染色质解旋酶DNA结合蛋白(CHD1L)在喉鳞状细胞癌(LSCC)增殖、侵袭和转移中的作用机制,为喉鳞状细胞癌的治疗提供分子靶点.方法 免疫组织化学方法检测60例喉鳞状细胞癌组织和其配对癌旁正常黏膜组织中CHD1L、上皮性钙黏着蛋白(E-cadherin)和波形蛋白(Vimentin)的表达;Western ...