食管癌组织中p53和VEGF的表达及其与肿瘤血管生成的关系

目的探讨p53、血管内皮生长因子 (vascular endothelial growth factor,VEGF)的表达和肿瘤内微血管密度 (microvessel density,MVD)测定在食管癌中的意义.方法采用免疫组化方法,检测 45例食管癌患者手术切除标本p53、VEGF的表达,并用CD34抗体标记肿瘤组织血管内皮细胞,计算MVD.结果 p53、VEGF总阳性表达率分别为73.3%(33/45)和62.2%(28/45),MVD平均为48±20.p53的表达与临床TNM分期和淋巴结转移相关,MVD和VEGF表达与食管癌的细胞分化程度、浸润深度和临床TNM分期密切相关.p53/VEGF表达均阳性组MVD高于p53/VEGF其一阳性组和p53/VEGF均阴性组,p53、VEGF表达与MVD密切相关,并存在交互作用.p53和VEGF表达符合率为84.4%(38/45),VEGF与p53的表达有相关性(P<0.001).结论 (1)p53、VEGF的表达以及MVD的测定可作为判断食管癌恶性潜能的重要生物学指标.(2)p53、VEGF的表达对肿瘤血管形成可能起重要作用,联合检测p53、VEGF的表达对了解肿瘤血管形成的机制有一定意义.     

血管内皮生长因子与食管癌的研究进展

血管内皮生长因子 (VEGF)特异性作用于血管内皮细胞 ,促进新血管的生成 ,在多种肿瘤组织中均高表达。VEGF在食管癌的生长和转移过程中起了重要的作用且与食管癌预后明显相关。针对VEGF及其受体的肿瘤治疗也取得了很大的进展。     

血管内皮生长因子与食管癌的研究进展

血管内皮生长因子(VEGF)特异性作用于血管内皮细胞，促进新血管的生成，在多种肿瘤组织中均高表达。VEGF在食管癌的生长和转移过程中起了重要的作用且与食管癌预后明显相关。针对VEGF及其受体的肿瘤治疗也取得了很大的进展。     

血管内皮生长因子在食管癌组织中的表达及其临床意义研究

 目的 探讨食管癌组织中VEGF的表达水平与食管癌生物学特性的关系. 方法 应用免疫组化法分析人食管癌组织中VEGF的表达和微血管密度;应用RT-PCR法检测食管癌组织及人食管癌细胞株VEGFmRNA的表达. 结果 食管癌组织的VEGF阳性表达率为70.9%,VEGF在肿瘤组织的表达水平明显高于癌旁组织,其表达水平与肿瘤的病理学分级、肿瘤的浸润深度及淋巴结转移等行为有关.食管癌组织中微血管分布不均,血管密集区主要集中在癌灶边缘;MVD与肿瘤的分化程度和淋巴结转移相关;MVD与VEGF的表达之间存在正相关关系.食管癌组织的VEGFmRNA表达比癌旁组织增高,以VEGF189、VEGF165和VEGF121三种亚型为主. 结论 VEGF在食管癌组织中呈高表达状态,该现象与肿瘤的恶性程度、转移情况及微血管形成能力相关.     

VEGF和MMP-9在食管癌中的表达及低氧调节

目的 研究血管内皮生长因子（VEGF）和基质金属蛋白酶－9（MMP－9）的表达与食管癌血管形成和临床的关系,以及低氧对其的调节作用。方法 用逆转录－聚合酶链式反应（RT－PCR）检测了42例食管癌手术标本（包括18例癌旁组织）中VEGF和MMP－9mRNA的表达,用免疫组化染色的方法检测了56例食管癌标本中VEGF蛋白的表达和平均血管密度（MVD）,同时用酶联免疫吸附试验（ELISA）的方法定量测定了低氧对食管癌细胞系中VEGF和MMP－9表达的影响。结果 食管癌中VEGF的表达显著高于癌旁组织,与肿瘤内平均MVD密切正相关,VEGF表达和肿瘤中MVD计数与食管癌的分期、淋巴结转移密切相关。食管癌中MMP－9的表达也显著高于癌旁组织,但MMP－9的表达与食管癌中的MVD计数和临床病理特征无关。低氧可以显著增加食管癌细胞系中VEGF的表达,但对MMP－9的表达无明显影响。结果 VEGF的表达可能在食管癌血管形成和转移中起重要作用,并受低氧调节,有可能作为反映食管癌进展的生物学指标和抗血管治疗的靶点。     

食管癌患者血清中血管内皮生长因子和胰岛素样生长因子-1表达及其与临床病理特征的关系

目的 探讨食管癌患者血清中血管内皮生长因子(VEGF)和胰岛素样生长因子-1(IGF-1)的表达变化,明确其临床意义.方法 选取食管癌患者58例,另选取同期健康体检者40例作为正常对照,均采用ELISA法测定VEGF和IGF-1表达水平.结果 食管癌患者血清中VEGF和IGF-1的表达水平分别为(88.2±22.3)p...     

血管内皮生长因子在食管癌不同阶段的表达及临床意义

肿瘤的持续生长有赖于新生血管的形成，新生血管为肿瘤提供必须的氧和营养，是肿瘤生长的必须物质条件[１，２]。在肿瘤的血管生长过程中，血管内皮生长因子（vascularendothelialgrowthfactor，VEGF）起着决定性作用，它促进血管内皮细胞分裂增殖，促使血管通透性增加，是肿瘤血管生长和肿瘤转移的关键因素[３]。为探讨VEGF在食管癌不同阶段的表达及临床意义，我们采用免疫组织化学技术检测不同阶段食管癌组织VEGF蛋白表达和微血管密度（microvesseldensity，MVD），以揭示VEGF在食管癌发生发展过程中的作用和意义。１材料与方法１…     

食管癌血清和尿液中血管内皮生长因子水平的变化及其意义

目的检测食管癌患者术前血清和尿液中血管内皮生长因子(VEGF)水平,探讨VEGV与食管癌的关系及其临床意义.方法应用酶联免疫吸附法(ELISA)对82例食管癌患者术前血清和尿液中VEGF水平进行测定,并对其进行对照分析.结果食管癌患者术前血清和尿液VEGF水平分别为(92.81±5.86)ng/L和(277.92±22.71)ng/L,明显高于正常人组(P＜0.01).食管癌组术前尿液VEGF水平与肿瘤的分化程度、侵袭程度、临床分期及淋巴结转移等密切相关(P＜0.05);且术前尿液组的VEGF水平明显高于术前血清组(P＜0.01).结论VEGF可能参与食管癌的发生、发展和转移过程的调控,尿液VEGF含量的增强,预示食管癌的转移和预后不良.     

缺氧诱导因子1α在食管鳞癌组织中的表达及其与VEGF、MVD的关系

目的 探讨食管鳞癌组织中缺氧诱导因子1α(HIF-1α)、VEGF的表达及其与微血管密度(MVD)、肿瘤临床病理特征之间的关系.方法 采用免疫组化方法检测56例食管鳞癌及20例癌旁正常黏膜中HIF-1α、VEGF的表达,用Endoglin(CD105)单克隆抗体标记血管内皮细胞并计数MVD,分析其间的相关性及其与肿瘤临床病理特征之间的相关性.结果 食管鳞癌组织中HIF-1α和VEGF的阳性表达率显著高于正常组织(P＜0.01);HIF-1α和VEGF的表达均与淋巴结转移和TNM分期呈正相关(P＜0.05);VEGF的表达还与肿瘤浸润深度正相关(P＜0.05);HIF-1α的表达与VEGF的表达和MVD值呈正相关(P＜0.01).结论 HIF-1α及其靶基因VEGF在食管癌组织中明显上调,与肿瘤新生血管密切相关,HIF-1α可能通过诱导VEGF的表达参与食管鳞癌的血管生成,在食管癌的发生、发展及浸润过程中起了重要作用;联合检测HIF-1α和VEGF可能成为判断食管鳞癌生物学行为及预后的重要指标.     

内镜超声结合血清转化生长因子β1和血管内皮生长因子表达在食管癌术前分期中的意义

目的:探讨超声内镜(endoscopic ultrasonograph, EUS)结合血清血管内皮生长因子(vascular endothelial growth factor, VEGF)和转化生长因子β1(transforming growth factor-beta1,TGF-β1)的表达对食管癌术前分期的价值.方法:125例食管癌患者于术前行胃镜和EUS检查,并进行术前分期;同时检测术前血清TGF-β1和VEGF水平,并与术后病理分期进行比较.结果:EUS对食管癌浸润深度判断的总准确率为88.0%,淋巴结转移判断的总准确率为72.0%.血清TGF-β1和VEGF的表达水平与食管癌浸润深度、EUS分期和淋巴结转移密切相关(P＜0.05).EUS联合血清TGF-β1和VEGF水平对食管癌浸润深度和淋巴结转移判断的准确率明显提高,总准确率分别达94.4%和92.0%.结论:食管癌EUS分期与血清TGF-β1和VEGF的表达密切相关,EUS联合术前血清TGF-β1和VEGF检测有助于提高对食管癌浸润和转移判断的准确性.     

The Therapeutic and Preventive Efficacy of Curcumin and Its Derivatives in Esophageal Cancer

Esophageal cancer is the eighth most common occurring cancer type worldwide and 6th most common amongthe cancer related deaths of which the most common type is squamous cell carcinoma which comprise about 90%of esophageal cancer cases. The standard of care for esophageal cancer is neoadjuvant concurrent chemotherapy andradiation (NACRT) followed by surgery however the prognosis remains dismal with 5 year survival a meager 10-15%.The treatment modalities for esophageal cancer is associated with both long term and short term toxicities. Curcuminhas been explored as a therapeutic modality as a chemo adjuvant in different cancers due to its low toxicity profile andpotent anticancer effect however despite lot of promising preclinical data it has not progressed from bench side to bedside. The primary reason that has obstructed its application in clinic has been its low bioavailability which was seenin different clinical trials but there has been tremendous progress in developing formulations of curcumin which havesignificantly increased its bioavailability and are being tested in clinical trials. Esophageal cancer is associated withinflammation that’s why curcumin being a natural antioxidant offer a potential avenue to reduce toxicity of currenttherapeutic modalities in a chemo adjuvant setting while simultaneously targeting different pro oncogenic pathways.The present review tries to cover in depth different aspects of curcumin application in treatment of esophageal cancerand progress of this potent anticancer agent in its treatment and prevention.     

尼妥珠单抗在食管癌中的应用进展

食管癌是我国常见消化系统恶性肿瘤,对于不可手术切除的局部晚期食管癌,同期放化疗是较为公认的治疗方式,但疗效仍有待提高。尼妥珠单抗作为中国第一个治疗恶性肿瘤的人源化单克隆抗体,已应用于鼻咽癌、神经胶质瘤、胰腺癌等多种恶性肿瘤的治疗,且生存获益显著,不良反应轻微,因此越来越多的学者也关注到其在食管癌治疗中的价值。本文拟对尼妥珠单抗在食管癌中的应用进展进行综述,以期对食管癌的治疗提供新的思路。     

食管癌发病水平及变化趋势

食管癌在世界癌症发病中占第8 位,位居全球癌症死因的第6 位。食管癌预后较差,对人类健康的危害严重。我国是食管癌高发国家,也是世界上食管癌新发病例最多的国家。食管癌的组织学类型主要分为食管鳞癌和食管腺癌,从上世纪70代开始许多西方国家的食管鳞癌发病率呈下降趋势,与此相反食管腺癌的发病率迅速增加,成为增长速度最快的恶性肿瘤之一。中国人群食管癌的病理类型以鳞状上皮细胞癌为主,该组织学类型占我国食管癌发病的90% 以上。我国食管癌发病率呈明显的地区差异,食管鳞癌和食管腺癌的发病水平、地理分布、时间变化趋势及发病危险因素存在较大差别。本文阐述食管癌发病水平及变化趋势,以期为我国食道癌预防和控制策略制定、实施与效果评估提供基础信息。      

LINC00488 stimulates the progression of esophageal cancer by targeting microRNA-485-5p

Esophageal cancer is the eighth most prevalent malignancy in the world and China has a high incidence of esophageal cancer. Previous studies have identified that LINC00488 is an oncogene; however, its role in esophageal cancer remains unclear. The present study detected the expression and biological functions of LINC00488 in the progression of esophageal cancer. LINC00488 levels in 45 esophageal cancer and matched paracancerous tissues were detected. The association between LINC00488 level, clinical indexes and overall survival rate of patients with esophageal cancer was analyzed. Using Cell Counting Kit-8, Transwell and wound healing assays, the influence of LINC00488 on the biological functions of OE19 and OE33 cells were assessed. The target gene of LINC00488, microRNA-485-5p (miRNA-485-5p), was predicted using bioinformatics databases. In addition, the role of miRNA-485-5p in the progression of esophageal cancer was evaluated using rescue experiments. LINC00488 was upregulated in esophageal cancer tissues and cell lines. A high level of LINC00488 was associated with lymphatic and distant metastasis and poor prognosis in patients with esophageal cancer. Silencing LINC00488 attenuated the viability, migration and wound healing of OE19 and OE33 cells. miRNA-485-5p was downregulated in esophageal cancer and low expression levels predicted a poor prognosis in these patients. In addition, miRNA-485-5p level was negatively correlated with that of LINC00488. Rescue experiments showed that knockdown of miRNA-485-5p reversed the attenuated proliferation and migration of esophageal cancer cells with LINC00488-knockdown. In conclusion, LINC00488 aggravated the malignant progression of esophageal cancer by targeting miRNA-485-5p.     

中医药防治食管胃癌术后胃食管反流研究进展

单纯给予西药治疗食管胃癌术后胃食管反流疗效不明显,中医药在此疾病治疗领域中有其独特的功效。近年来,许多研究者在探讨中药治疗食管贲门癌术后胃食管反流临床疗效的研究中,取得了一些进展,现就此研究进展作一综述。     

Modern staging and utility of PET imaging in esophageal cancer management

Esophageal cancer is the eighth most common cancer worldwide, and one of the most fatal diseases despite modern medical treatment. Because correct staging and surveillance of neoadjuvant therapy for esophageal cancer is mandatory for further treatment planning, choosing a modern imaging system is important. The development of 18F-fluorodeoxyglucose positron emission tomography (18F-FDG-PET) has provided alternate means of tumor detection distinct from more conventional methods. This modality has extraordinary performance in detecting locoregional lymph node involvement and distant metastatic disease, and has been introduced as a powerful tool in many guidelines. However, some factors still lead to false-negative or -positive results, raising questions of its accuracy. This article discusses the clinical efficacy of PET in staging and surveillance of neoadjuvant therapy in esophageal cancer, comparing its accuracy with conventional imaging modalities.     

生存质量在食管癌中的研究现状

随着临床肿瘤学以及人文医学的发展,肿瘤医学模式由重视癌症患者的生命数量转向提高患者的生命质量。随着对生存质量的深入研究,其在癌症的治疗方案选择、疗效评价、预后评估等方面具有重要意义。食管癌是消化道肿瘤中最常见的恶性肿瘤,我国食管癌的发病率和死亡率居世界首位,提高食管癌患者的生存质量是食管癌治疗的重要目标之一。近年来关于食管癌患者的生存质量的研究蓬勃发展,本文就生存质量在食管癌中的研究现状作一综述。     

Silencing of polo-like kinase (Plk) 1 via siRNA causes inhibition of growth and induction of apoptosis in human esophageal cancer cells

Esophageal cancer ranks among one of the most frequent causes of cancer death in the world. Polo-like kinase 1 (Plk1) is overexpressed in human tumors and has prognostic value in many cancers including esophageal cancer, indicating its potential as a therapeutic target. In this study, we investigated the therapeutic potential of Plk1 in esophageal cancer using the technique of RNA silencing via small interfering RNA (siRNA). Synthetic siRNA duplexes against Plk1 were introduced into 4 esophageal cancer cell lines, which subsequently resulted in a significant inhibition in Plk1 expression in the cells. We found that the targeted depletion of Plk1 caused a dramatic mitotic catastrophe (mitotic cell cycle arrest as well as defects in several mitotic events such as incomplete separation of sister chromatids and failure of cytokinesis) followed by massive apoptotic cell death, and eventually resulted in a significant decrease in growth and viability of all 4 esophageal cancer cell lines studied. In addition, our results also indicated that the mitotic arrest induced by Plk1 depletion is mediated by the inactivation of the cdc2/cyclin B1 complex. Taken together, our study strongly suggests that Plk1 may serve as a potential therapeutic target in human esophageal cancer.     

人工智能在早期食管癌内镜诊断中的应用及进展

中国是食管癌高发国家,中晚期食管癌不仅给患者生命健康带来严重威胁,也给其家庭和社会带来沉重的经济负担。食管癌的早诊早治一直是临床医学研究的热点,而胃镜筛查是食管癌早诊早治的关键,人工智能的发展有望在内镜检查和质控等方面为食管癌早诊早治提供新的辅助手段。文章通过概述人工智能在早期食管癌内镜诊断中的应用和发展,归纳了人工智能在早期食管癌诊断中的研究结果,阐明其应用的重要性,总结了人工智能在早期食管癌内镜诊断中的难点及问题,并对未来人工智能在食管癌内镜诊断中的应用进行展望。     

食管癌高低发区贲门癌发病对比分析简

目的：分析食管癌高低发区贲门癌发病的特点和异同,为贲门癌防治提供科学依据。方法：收集、整理1988-2007年食管癌低发区广东中山市与高发区河北磁县全人群肿瘤登记中的贲门癌发病资料,比较其发病数、粗率、中国与世界标化发病率（简称中标率与世标率）、构成比和发病趋势等指标。结果：1988-2007年广东中山与河北磁县贲门癌世标发病率分别为0.50/105和23.87/105,磁县发病远高于中山,是中山的47.74倍,两地贲门癌发病均呈上升趋势,尤以河北磁县显著。此外,广东中山市贲门癌男女发病数比例高于河北磁县。结论：虽然期间两地贲门癌发病均呈上升趋势,但其贲门癌发病存在显著差异,食管癌高发区河北磁县贲门癌发病远高于食管癌低发区广东中山,且其发病趋势与食管癌相反,而中山相同。