Delta4的功能性研究及与其他Notch配体的比较

目的：探讨Delta4基因在Notch传导机制中的作用。方法：构建pTracer．CMV．Delta4．FLAG载体，瞬时转染COS7细胞、稳定转染CHO细胞，筛选高表达Delta4的稳定CHO细胞系。用Luciferase分析，观察并比较Delta4对Notch1—CHO及Notch2-CHO两个宿主细胞的信号功能活性，与Deha1、Jagged1及Jagged2比较，从而对此基因定性并获知其信号功能活性水平。结果：Western—blot证实pTracer．CMV．Delta4．FLAG可瞬时转染COS7细胞及稳定转染CHO细胞，并根据Delta4蛋白表达条带的强弱筛选高表达Delta4-CHO细胞系。Delta4对Notch1及Notch2均具有信号功能活性，且对后者的活性功能水平大于前者。对Notch1，Delta4的功能活性略低于Jagged2，但高于Deha1及Jagged1；对Notch2，Delta4的功能活性低于Delta1、Jagged1及Jagged2，但亦具有较强的活性水平。结论：建立的Delta4-CHO细胞系功能稳定，Delta4为Notch1及Notch2的配体，且对Notch2的活性水平高于Notch1。     

Immunolocalization of notch signaling protein molecules in a maxillary chondrosarcoma and its recurrent tumor

Background

Notch receptors are critical determinants of cell fate in a variety of organisms. Notch signaling is involved in the chondrogenic specification of neural crest cells. Aberrant Notch activity has been implicated in numerous human diseases including cancers; however its role in chondrogenic tumors has not been clarified.

Method

Tissue samples from a case of primary chondrosarcoma of the maxilla and its recurrent tumor were examined immunohistochemically for Notch1-4 and their ligands (Jagged1, Jagged2 and Delta1) expression.

Results

Both primary and recurrent tumors were histopathologically diagnosed as conventional hyaline chondrosarcoma (WHO Grade I). Hypercellular tumor areas strongly expressed Notch3 and Jagged1 in spindle and pleomorphic cells suggesting up-regulation of these protein molecules at sites of tumor proliferation. Expression patterns were distinct with some overlap. Differentiated malignant and atypical chondrocytes demonstrated variable expression levels of Jagged1, and weak to absent staining for Notch1, 4 and Delta1. Protein immunolocalization was largely membranous and cytoplasmic, sometimes outlining the lacunae of malignant chondrocytes. Hyaline cartilage demonstrated a diffuse or granular precipitation of Jagged1 suggesting presence of soluble Jagged1 activity at sites of abnormal chondrogenesis. No immunoreactivity for the other Notch members was observed. Calcified cartilage was consistently Notch-negative indicating down-regulation of Notch with cartilage maturation. Stromal components namely endothelial cells and fibroblasts variably expressed Notch1, 3 and Jagged1 but were mildly or non-reactive for the other members.

Conclusions

Results indicate that Notch signaling pathway may participate in cellular differentiation and proliferation in chondrosarcoma. Findings implicate Notch3 and Jagged1 as key molecules that influence the differentiation and maturation of cells of chondrogenic lineage.     

Notch配体在哮喘小鼠肺中的表达

目的 明确Notch配体（Delta1J、agged1及Jagged2）在小鼠哮喘模型肺中的表达水平，探讨其在哮喘发病机制中的作用。方法 20只BALB/c小鼠随机分为正常对照组和哮喘组（每组10只）。通过卵清蛋白腹腔注射及雾化吸入建立哮喘模型。采用半定量PCR检测Notch配体（Delta1J、agged1及Jagged2）mRNA在哮喘组和正常对照组小鼠肺组织和肺细胞中的表达水平。结果 与正常对照组比较，哮喘小鼠肺组织及肺细胞的Delta1 mRNA表达显著降低（P均〈0.001），Jagged1和Jagged2 mRNA表达显著升高（P〈0.001或0.05）。结论 在哮喘的发病环节中，Notch配体Delta1表现为抑制作用，Jagged1和Jagged2表现为促进作用。     

Notch signaling and ghost cell fate in the calcifying cystig odontogenic tumor

Notch signaling is an evolutionarily conserved mechanism that enables adjacent cells to adopt different fates. Ghost cells (GCs) are anucleate cells with homogeneous pale eosinophilic cytoplasm and very pale to clear central areas (previous nucleus sites). Although GCs are present in a variety of odontogenic lesions notably the calcifying cystic odontogenic tumor (CCOT), their nature and process of formation remains elusive. The aim of this study was to investigate the role of Notch signaling in the cell fate specification of GCs in CCOT. Immunohistochemical staining for four Notch receptors (Notch1, Notch2, Notch3 and Notch4) and three ligands (Jagged1, Jagged2 and Delta1) was performed on archival tissues of five CCOT cases. Level of positivity was quantified as negative (0), mild (+), moderate (2+) and strong (3+). Results revealed that GCs demonstrated overexpression for Notch1 and Jagged1 suggesting that Notch1-Jagged1 signaling might serve as the main transduction mechanism in cell fate decision for GCs in CCOT. Protein localizations were largely membranous and/or cytoplasmic. Mineralized GCs also stained positive implicating that the calcification process might be associated with upregulation of these molecules. The other Notch receptors and ligands were weak to absent in GCs and tumoral epithelium. Stromal endothelium and fibroblasts were stained variably positive.     

Notch信号通路在宫颈癌患者外周血单个核细胞的表达及其临床意义

目的探讨Notch信号通路在宫颈癌发病机制中的作用。方法采用实时荧光定量PCR和流式细胞术,分别从基因转录和蛋白表达水平检测30例宫颈癌患者和30例健康对照者的外周血单个核细胞（PBMCs）中Notch 1,Notch 2,Notch 3,Notch 4,以及Notch的配体Jagged 1,Jagged 2,Delta 1,Delta 3,Delta 4的表达。结果宫颈癌患者PBMCs中的Notch 1,Notch 2,Jaggcd 1,Jagged 2,Delta 1,Delta 4的mRNA和蛋白的表达均明显高于健康对照组（P〈0．01）,Notch 3,Notch 4,Delta 3的基因和蛋白的表达在两者中差异均无统计学意义（P〉0．05）。结论Notch信号通路的表达在宫颈癌的发病过程中存在一定的变化,可能参与宫颈癌的发生发展,从而为官颈癌的早期诊断和临床治疗提供新线索。     

Effects of Xinfeng capsule on pulmonary function based on treg-mediated notch pathway in a rat model of adjuvant arthritis

OBJECTIVE:To observe the impact of xinfeng xapsule(XFC) on pulmonary function in a rat model of adjuvant arthritis(AA) and to investigate the mechanism of action.METHODS:Forty rats were randomly divided into four groups of ten:normal control(NC);model control(MC);tripterygium glycosides tablet(TPT);and xinfeng capsule(XFC).Except for the NC group,AA was induced in all rats by intracutaneous injection of 0.1 mL Freund’s complete adjuvant in the right paw on the 19th day.NC and MC groups were given(0.9%) physiological saline.The TPT and XFC groups were given TPT(10 mg/kg) and XFC(1.2 g/kg),respectively.Thirty days after administration,changes in paw edema(E),the arthritis index(AI),pulmonary function,levels of regulatory T-cells(Treg),ultrastructure of lung tissue,and expression of Notch receptors and ligands in lung tissue were observed.RESULTS:In the MC group,E and the AI were increased and pulmonary function significantly decreased;the structure of alveolar type-II cells was damaged;ratios of Treg in peripheral blood were reduced;and expression of Notch receptors such as Notch3 and Notch4 and ligands such as Delta1 in lung tissue were significantly increased whereas expression of Notch1,Jagged1 and Jagged2 were significantly decreased.After intervention with XFC,E and the AI were decreased;pulmonary function was enhanced;the structure of alveolar type-II cells was improved;and expression of Treg,Notch1,Jagged1,Jagged2 was elevated,whereas that of Notch3,Notch4 and Delta1 was reduced.CONCLUSION:XFC can not only inhibit E and the AI and improve joint symptoms,it can also improve pulmonary function and reduce inflammation in lung tissue.These actions could be carried out through increases in the expression of Treg,Notch receptors(Notch1) and ligands(Jagged1,Jagged2),and reductions in the expression of Notch3,Notch4 and Delta1.These phenomena would reduce the deposition of immune complexes and the inflammatory response in lung tissue,thereby improving joint symptoms and pulmonary function.     

致敏小鼠树突状细胞和T细胞Notch配体/受体的表达及大剂量过敏原的影响

目的探讨致敏小鼠Notch信号表达缺陷及大剂量过敏原对其影响。方法RT-PCR法分别检测致敏及正常小鼠树突状细胞Notch配体及T细胞Notch受体的mRNA表达情况,并观察大剂量过敏原作用对其表达的影响。结果（1）致敏小鼠树突状细胞Notch配体Jagged1,Jagged2和Delta1的mRNA表达均显著低于正常小鼠,致敏小鼠T细胞Notch1和Notch3的mRNA表达也显著低于正常小鼠（P〈0.05）。（2）10mg/ml的OVA作用下,Jagged1和Notch3的mRNA表达水平较对照组显著升高（P〈0.05）。结论致敏小鼠Notch信号表达缺陷,大剂量过敏原（10mg/ml的OVA）可上调Jagged1和Notch3表达。     

Notch信号通路在小儿哮喘患者外周血单个核细胞的表达及其临床意义

目的初步探讨Notch信号通路相关分子在小儿哮喘患者中的表达及其临床意义。方法实时荧光定量聚合酶链反应和流式细胞术,分别从基因转录和蛋白表达水平检测20例小儿哮喘患者和20例健康对照者的外周血单个核细胞（PBMC）中Notch1、Notch2、Notch3、Notch4以及Notch的配体Jagged1、Jagged2、DLL1（Delta-like1）、DLL3（Delta-like3）、DLL4（Delta-like4）的表达。结果小儿哮喘患者PBMC中的Notch1、Notch3、Jagged1、Jagged2、Delta1的mRNA和蛋白的表达均明显高于健康对照组（P〈0.01）,Notch2、Notch4、Delta3和Delta4的基因和蛋白的表达在两者中未见明显差异（P〉0.05）。结论 Notch信号通路的表达在小儿哮喘发病过程中有显著改变,可能参与小儿哮喘的发生发展,为深入研究小儿哮喘的发病机制提供思路。     

Squamous odontogenic tumor of the mandible: a case report demonstrating immunoexpression of Notch1, 3, 4, Jagged1 and delta1

Background

Squamous odontogenic tumor (SOT) is a rare benign odontogenic epithelial neoplasm. A slow-growing painless expansive swelling is the common presenting symptom. Histopathologically, SOT can be easily misdiagnosed as an acanthomatous ameloblastoma. Although Notch receptors and ligands have been shown to play a role in cell fate decisions in ameloblastomas, the role of these cell signaling molecules in SOT is unknown.

Case report

This paper describes a case of SOT affecting the anterior mandible of a 10-year-old Indian female. The patient was treated by local surgical excision and there has been no follow-up clinical record of recurrence 5 years after primary treatment. Histopathological examination revealed a solid, locally-infiltrative neoplasm composed of bland-looking squamatoid islands scattered in a mature fibrous connective tissue stroma and the diagnosis was SOT. Immunohistochemical evaluation showed positive reactivity of varying intensity in the neoplastic epithelial cells for Notch1, Notch3, Notch4, and their ligands Jagged1 and Delta1. Expression patterns showed considerable overlap. No immunoreactivity was detected for Notch2 and Jagged2.

Conclusions

Present findings suggest that Notch receptors and their ligands play differential roles in the cytodifferentiation of SOT.     

六味地黄汤通过树突状细胞Notch信号通路调节T细胞分化干预自身免疫性脑脊髓炎

目的 通过观察树突状细胞（dendritic cells,DCs）Notch信号通路对CD4+ T细胞分化的影响,探究六味地黄汤干预实验性自身免疫性脑脊髓炎（experimental autoimmune encephalomyelitis,EAE）的机制。方法 采用主动免疫法诱导2D2小鼠EAE模型,采用磁珠分选收集脾脏和淋巴结中CD4+ T细胞;体外分离培养及诱导C57BL/6（C57）小鼠骨髓来源树突状细胞（bone marrow derived dendritic cells, BMDCs）成熟,分组干预后,与CD4+ T细胞共培养后,被动注射至C57小鼠体内,观察小鼠发病情况。将BMDCs与CD4+ T细胞的共培养细胞分为对照组、六味地黄汤组、γ分泌酶抑制剂（gamma-secretase inhibitor,GSI）组。采用Western blot法检测各组BMDCs的Notch通路蛋白表达水平,采用流式细胞仪分析各组CD4+ T细胞分化情况。结果 与正常组比较,模型组Notch通路相关蛋白Notch1、Jagged1、MAML蛋白表达水平均显著升高（P<0.05）。与模型组比较,六味地黄汤组DCs的Notch1、Jagged1、MAML蛋白水平显著下调（P<0.05）。通过BMDCs诱导的CD4+ T细胞向Treg分化增多,向Th17分化减少,并改善被动免疫诱导的EAE小鼠症状评分。结论 六味地黄汤可通过抑制DCs的Notch信号通路活化,减少CD4+ T细胞分化,进而缓解EAE残疾症状。     

雷公藤甲素对佐剂关节炎肺功能降低大鼠Notch通路受体和配体基因表达的影响

目的观察雷公藤甲素（TPT）对佐剂关节炎（AA)大鼠Notch受体、配体表达的影响。方法将40只大鼠随机分为正常对照（NC）
组、模型（MC）组、甲氨喋呤（MTX）组、TPT组,每组10只,分别向除NC组外的其余动物右后足跖皮内注射弗氏完全佐剂0.1 mL
致炎,复制AA大鼠模型,致炎后第12填开始给药。NC组及MC组均给予生理盐水,其余组分别给予MTX、TPT。给药30 d后,检
测各组足趾肿胀度（E）、关节炎指数（AI）、肺功能、Notch受体/配体的变化。结果MC组大鼠E、AI、Notch3、Notch4、Delta1表达明
显升高;肺功能参数、Notch1、Jagged1、Jagged2表达降低（P<0.01）;与MC组比较,TPT组肺功能参数、Notch1、Jagged1、Jagged2的
表达升高,E、AI及Notch3、Notch4、Delta1表达降低,疗效优于对照组MTX（P<0.05,P<0.01）。结论TPT可能是通过上调Delta1、
Notch3、Notch4的表达、下调Jagged1、Jagged2、Notch1表达,降低炎症反应和免疫复合物沉积,改善AA关节和肺部症状。
     

“补肾生髓”法通过Notch信号通路调节DCs介导的CD4+ T细胞分化及对EAE的干预作用研究

目的：研究“补肾生髓”法方药（BSD）对通过调节树突状细胞（Dendritic cells,DCs）Notch信号通路对CD4+ T细胞分化及实验性自身免疫性脑脊髓炎（Experimental autoimmune encephalomyelitis,EAE）模型小鼠发病的干预作用。 方法：主动免疫法诱导2D2小鼠EAE后,磁珠分选收集脾脏和淋巴结中 CD4+ T 细胞,体外分离培养及诱导 C57BL/6 （C57）小鼠骨髓来源树突状细胞（BMDC）成熟,分组干预后,与CD4+ T 细胞共培养后,被动注射至C57小鼠体内,观察小鼠发病情况。实验分组为：对照（Control）组、BSD组、阳性药物γ分泌酶抑制剂（gamma-secretase inhibitor,GSI）组。采用Western blot检测各组DCs Notch通路蛋白表达情况,采用流式细胞术分析各组中CD4+ T 细胞分化情况, 结果：BSD可抑制DCs Notch1,Jagged1,MAML蛋白水平,通过DCs诱导CD4+T细胞Treg分化增多,Th17分化减少,并改善被动免疫诱导的小鼠EAE症状评分。 结论：BSD可通过抑制DCs Notch信号通路活化,减少DCs介导的CD4+T细胞分化,进而缓解EAE残疾症状。     

Notch signaling: a novel regulating differentiation mechanism of human umbilical cord blood-derived mesenchymal stem cells into insulin-producing cells in vitro

Background Human umbilical cord blood-derived mesenchymal stem cells （UCB-MSCs） could be induced to differentiate into insulin producing cells （IPCs） in vitro, which have good application potential in the cell replacement treatment of type-1 diabetes. However, the mechanisms regulating this differentiation have remained largely unknown. Notch signaling is critical in cell differentiation. This study investigated whether Notch signaling could regulate the IPCs differentiation of human UCB-MSCs. Methods Using an interfering Notch signaling protocol in vitro, we studied the role of Notch signaling in differentiation of human UCB-MSCs into IPCs. In a control group the induction took place without interfering Notch signaling. Results Human UCB-MSCs expressed the genes of Notch receptors （Notch 1 and Notch 2） and ligands （Jagged 1 and Deltalike 1）. Human UCB-MSCs with over-expressing Notch signaling in differentiation resulted in the down-regulation of insulin gene level, proinsulin protein expression, and insulin-positive cells percentage compared with the control group. These results showed that over-expressing Notch signaling inhibited IPCs differentiation. Conversely, when Notch signaling was attenuated by receptor inhibitor, the induced cells increased on average by 3.06-fold （n=-4, P 〈0.001） in insulin gene level, 2.60-fold （n=-3, P 〈0.02） in proinsulin protein expression, and 1.62-fold （n=-6, P 〈0.001） in the rate of IPCs compared with the control group. Notch signaling inhibition significantly promoted IPCs differentiation with about 40% of human UCB-MSCs that converted to IPCs, but these IPCs were not responsive to glucose challenge very well both in vitro and in vivo. Hence, further research has to be carried out in the future. Conclusions Notch signaling may be an important mechanism regulating IPCs differentiation of human LICB-MSCs in vitro and Notch signaling inhibition may be an efficient way to increase the number of IPCs, which may resolve the shortage of islet of cell replacement treatment of type-1 diabetes.     

苦参碱对肝卵圆细胞增殖模型大鼠Notch1,Jagged1 mRNA表达的影响

目的:研究肝卵圆细胞增殖模型大鼠Notch1, Jagged1 mRNA表达的变化及苦参碱对其的影响.方法:雄性SD大鼠48只按体重随机分为4组:模型组(A组);苦参碱小剂量(B组);苦参碱组大剂量(C组);D组即正常对照组.用免疫组化方法观察造血干细胞标记(Thy-1)表达的变化、半定量RT-PCR方法观察肝组织中Notch1, Jagged1 mRNA表达的变化.结果:与D组比较,A组Thy-1蛋白, Notch1mRNA, Jagged1 mRNA表达显著升高(P＜0.01),与A组比较,C组Thy-1蛋白, Notch1mRNA, Jagged1 mRNA表达显著下调(P＜0.01).结论:苦参碱可有效的调节Notch信号通路、下调Thy-1蛋白表达,可能是其抑制卵圆细胞过度增殖、诱导卵圆细胞向肝细胞方向定向分化的机制之一.     

重组CHO细胞中不同启动子对含MAR表达载体转基因表达的影响

目的 分析在重组CHO细胞中不同启动子对含核基质结合区(MAR)表达载体转基因表达的影响.方法 PCR扩增CMV启动子及β-珠蛋白MAR,构建含β-珠蛋白MAR表达载体pCAT1,随后将CMV启动子替代pCAT1上SV40启动子构建CMV启动子驱动的表达载体pCAT2.pCAT1、pCAT2不含MAR的对照载体同时转染CHO细胞,G418筛选稳定转化的细胞株,酶联免疫吸附试验(ELISA)分析氯霉素乙酰转移酶(CAT)基因的表达水平.结果 含MAR表达载体转染的细胞CAT酶表达量比不合MAR的pCATG和pCAT3载体转染的细胞高,分别提高2.14倍和1.25倍(P＜0.05);而由SV40启动子驱动含MAR表达载体pCAT1转染的细胞CAT酶表达水平明显比由CMV启动子驱动的pCAT2载体高3.26倍(P＜0.05).结论 在稳定重组CHO细胞中MAR能够提高转基因的表达水平,SV40启动子与MAR组合其启动效率优于CMV启动子与MAR组合.     

人源性Jagged1 RNAi慢病毒载体的构建及鉴定

目的构建人源性Jagged1 RNAi慢病毒载体,并观察其对舌癌细胞中Jagged1的敲减作用。方法 GenBank检索人Jagged1信息,设计Jagged1靶点。BLAST比对同源性,合成双链DNAoligo。线性化的RNA干扰载体质粒pAJ-U6-shRNA-CMV-eGFP/PuroR,双酶切,与合成的双链DNAoligo连接,转化感受态细胞,选择阳性克隆进行鉴定。慢病毒三质粒系统共转染293T细胞,包装,纯化,并转染Tca8113以及Cal27细胞,测定转染效率。PCR及Western Blot检测Jagged1基因及蛋白表达变化。结果成功构建靶向Jagged1 RNAi载体质粒,并成功进行慢病毒包装。该系统可有效地感染Tca8113及Cal27细胞。细胞内Jagged1基因及蛋白表达均有明显下调。结论成功构建Jagged1 RNAi慢病毒载体,为下一步研究Jagged1在人舌鳞癌的中的作用机制奠定基础。     

Notch信号配体分子Jagged1和Delta4在人肝癌中的表达及意义

目的:研究Notch信号配体分子Jagged1和Delta4在肝癌中的表达,并分析其与肝癌临床病理学参数的相关性。方法:应用免疫组织化学的方法检测53例人肝癌组织标本中Jagged1和Delta4的表达,分析染色强度在临床病理学参数不同分组之间的差别。结果:Jagged1和Delta4均表达于肝癌细胞的胞质中,Jagged1在79.2%(42/53)的肝癌组织标本中有表达,其水平显著高于癌旁组织(P<0.05),Delta4表达于67.9%(36/53)的肝癌组织中,其水平与癌旁无明显差异。对临床病理学资料的统计学分析显示Jagged1和Delta4的表达在年龄大于50岁组均显著高于小于50岁组(均为P<0.05),且它们的表达在不同分化级别间差异显著(均为P<0.01)。结论:Jagged1的表达在肝癌组织显著高于癌旁组织,说明其参与肝癌的发病,Jagged1和Delta4与肝癌的分化有关,说明该两个分子可能影响肝癌的进展。     

Immunohistochemical localization of notch signaling molecules in ameloblastomas

We examined Notch signaling molecules, Notch1 and Jagged1, in serial large cases of typical solid/multicystic ameloblastoma. In general, Notch positive staining products were frequently detected in the cytoplasms of the cells. In the same cells, Jagged positive staining were also frequently observed, while only occasionally positive in peripheral cells, especially in cuboidal cells. The results showed that these morphogenesis regulation factors are closely related to cytological differentiation in neoplastic cells of ameloblastoma. The Notch and Jagged positive-cell ratios were frequently positive, and the ratios were nearly the same between the varied histopathological, cytological patterns. However, the less-differentiated cells were fewer in number than that of well-differentiated cells.     

Notch1、Jagged1在肝细胞癌组织中的表达及临床意义

目的探讨Notch1、Jagged1在肝细胞癌组织中的表达及临床意义。方法选择2010年3月～2012年6月手术治疗并经病理证实为肝细胞癌的患者35例,每例患者均取癌组织及癌旁组织（距癌组织2～3 cm处）,其中肝细胞癌组织35例,癌旁肝硬化组织13例,癌旁正常肝组织22例。采用实时荧光定量PCR法检测Notch1mRNA、Jagged1 mRNA在肝细胞癌组织、癌旁肝硬化组织及癌旁正常肝组织中的表达;免疫组织化学染色法检测Notch1、Jagged1蛋白的表达,并分析两种蛋白的表达与肝细胞癌临床病理特征的关系。结果①肝细胞癌组织中Notch1 mRNA、Jagged1 mRNA的表达分别为（4.58±0.77）、（4.96±0.87）,显著高于癌旁正常肝组织,差异有统计学意义（P〈0.05）;与癌旁肝硬化组织[（1.16±0.37）、（1.42±0.58）]比较,差异有统计学意义（P〈0.05）;而癌旁正常肝组织与癌旁肝硬化组织比较差异无统计学意义（P〉0.05）。②肝细胞癌组织中,Notch1、Jagged1的阳性表达率分别为71.4%（25/35）、68.6%（24/35）;癌旁正常肝组织中,Notch1、Jagged1的阳性表达率分别为36.4%（8/22）、40.9%（9/22）;癌旁肝硬化组织中,Notch1、Jagged1的阳性表达率分别为30.8%（4/13）、30.8%（4/13）。Notch1、Jagged1的阳性表达率在肝细胞癌组织中明显高于癌旁正常肝组织（χ^2otch1=6.81,χ^2agged1=4.24,P〈0.05）及肝硬化组织（χ^2otch1=6.55,χ^2agged1=5.57,P〈0.05）。Notch1、Jagged1的阳性表达率在癌旁正常肝组织与肝硬化组织间差异无统计学意义（P〉0.05）。Spearman相关分析显示,肝细胞癌组织中Notch1的表达与Jagged1的表达呈正相关（r=0.38,P〈0.05）。③Notch1、Jagged1蛋白的阳性表达率与患者的年龄、性别、肿瘤直径、数目、有无癌栓形成无关（P〉0.05）;与有无淋巴结转移、病理分级密切相关。有淋巴结转移者Notch1、Jagged1阳性表达率高于无淋巴结转移者;低分化癌组织Notch1、Jagged1的阳性表达率明显高于中高分化癌组织,差异均有统计学意义（P〈0.05）。结论 Notch信号通路中Notch1、Jagged1对肝细胞癌的发生发展起促进作用,可为判断临床预后提供参考价值。