血小板源性生长因子对体外培养内皮细胞碱性成纤维细胞生长因子水平的影响

目的 :观察血小板源性生长因子 (PDGF)对于培养脐静脉内皮细胞碱性成纤维细胞生长因子 (bFGF)水平的影响 ,探讨PDGF促进新生血管形成的机制。方法 :通过内皮细胞的培养和免疫组织化学等方法检测PDGF对缺氧和常规培养内皮细胞bFGF水平的影响以及不同浓度PDGF促bFGF表达的作用。结果 :缺氧培养与常规培养均能增加内皮细胞胞浆bFGF水平 ,且呈剂量依赖性。结论 :PDGF可能通过直接促血管形成生长因子bFGF的介导作用间接促进新生血管的形成。     

血管内皮生长因子在鼠尾胶原凝胶诱导三维血管新生中的作用研究

背景:血管新生在组织工程研究中已引起了高度重视。血管内皮生长因子在二维平面培养中已证实能促进血管新生。目的:观察血管内皮生长因子在三维血管新生中的作用。方法:取SD大鼠骨髓,分离出内皮祖细胞。待细胞融合至70%～80%时添加鼠尾另一层胶原凝胶建立三维立体模型。实验组采用完全培养液含M199培养液、胎牛血清加血管内皮生长因子及双抗;对照组培养液中不含血管内皮生长因子。培养第1,4,7,20天观察骨髓来源内皮祖细胞的体外培养和扩增情况并进行细胞鉴定。三维立体模型建立后第3,6,9,12天进行形态观察及定性定量分析。结果与结论:实验组内皮祖细胞在三维基质内向胶原基质内生长,24h内即可出现向胶原内的出芽及浸润并逐渐形成分支样结构,对照组细胞生长慢,出芽慢,管状结构细小,向胶原内浸润的深度浅,网状结构稀疏,不完整。实验组新生血管数目显著高于对照组(P0.01)。取第3,6,9,12天的凝胶块检测,可见内皮素1、内皮型一氧化氮合成酶3表达阳性。结果表明,血管内皮生长因子能动员和诱导内皮祖细胞促进血管新生。鼠尾胶原凝胶可以诱导内皮祖细胞表现出血管新生中的迁移、增殖和发芽等步骤。     

小鼠骨髓来源早晚期内皮祖细胞的生物学特性

背景:关于内皮祖细胞统一的定义、相关的生物学特性及在血管发生发展过程中的精准作用等问题存在较大的争议。目的:探索用序列差速贴壁法分离、培养小鼠骨髓血管早、晚期内皮祖细胞的条件并比较早晚期内皮祖细胞的生物学特性差异。方法:采用Ficoll密度梯度离心法从小鼠骨髓中分离单个核细胞,种植于人纤维粘连蛋白包被的培养瓶中,利用序列差速贴壁法分离、纯化细胞早晚期内皮祖细胞。比较早晚期内皮祖细胞在细胞形态、DiI-LDL及FITC-UEA-1摄取能力、细胞的免疫表型、生长增殖能力及体外形成管腔结构能力的差别。结果与结论:早期内皮祖细胞呈集落样成长,晚期呈铺路石样生长,早、晚期内皮祖细胞都可以吞噬DiI-LDL连接FITC-UEA-1。晚期内皮祖细胞拥有较强增殖潜能,早期在体外基质胶上不形成管腔样结构而晚期内皮祖细胞可形成管腔样结构。提示:骨髓中存在具有不同特性的早晚期内皮祖细胞,晚期内皮祖细胞拥有巨大的增殖潜能并在体外参与血管样结构。     

CD133+卵巢癌干细胞样细胞在血管内皮细胞中的分化

背景：大量研究证实,新生血管形成在肿瘤的生长、浸润以及转移过程中发挥重要作用。 目的：探讨CD133+卵巢癌干细胞样细胞向血管内皮细胞分化的特点。 方法：通过无血清培养方法从卵巢癌A2780细胞株中成功诱导出CD133⁺卵巢癌干细胞样细胞,在体外接种于铺或不铺Matrigel基质胶的96孔板内,观察不同时间点CD133⁺卵巢癌干细胞样细胞和人脐静脉内皮细胞形成管腔样结构能力。通过裸鼠皮下移植实验,免疫荧光法观察CD133⁺卵巢癌干细胞样细胞在卵巢癌血管新生中的作用。 结果与结论：CD133⁺卵巢癌干细胞样细胞和人脐静脉内皮细胞(阳性对照)在未铺 Matrigel基质胶上并不能形成相应的管腔结构,且不表达内皮细胞标志物CD31,在Matrigel基质胶上能够形成相对稳定的管腔结构,CD31表达明显。CD133⁺卵巢癌干细胞样细胞接种裸鼠皮下成瘤后,可观察到肿瘤组织中有人源性CD31的表达。结果表明CD133⁺卵巢癌干细胞样细胞能够分化为血管内皮细胞,参与肿瘤血管重建。中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程     

血小板源性生长因子促进新生血管形成的机制研究

目的 :观察血小板源性生长因子 ( PDGF)对于培养脐静脉内皮细胞碱性成纤维细胞生长因子 ( b FGF)水平的影响 ,揭示 PDGF促进新生血管形成的机制。方法 :免疫组织化学检测培养脐静脉内皮细胞 b FGF水平。结果 :缺氧培养与常规培养相比内皮细胞胞浆b F GF水平无显著变化 ;不同剂量的 PDGF在常规或缺氧培养条件下均能增加内皮细胞胞浆 b FGF水平 ,且呈剂量依赖性。结论 :说明 PDGF可能通过直接促血管形成生长因子的介导作用间接促进新生血管的形成。     

血管内皮生长因子诱导的胶质瘤源性微血管内皮细胞体外三维成型特性

目的比较人脑胶质瘤源性微血管内皮细胞（GDMEC）和内皮细胞样细胞ECV304三维培养血管生成特性,探讨GDMEC在血管生成研究中的意义。方法采用免疫磁珠分选系统获得纯化的人脑GDMEC,以胶原为介质建立内皮细胞三维培养模型,比较观察GDMEC与ECV304细胞三维培养小管样结构（TLS）形成及不同浓度血管内皮生长因子（VEGF）对两种细胞TLS形成的诱导作用。结果所获GDMEC细胞纯度达98％,可连续传代培养。GDMEC的TLS形成数显著多于同数量、同时相点ECV304细胞的TLS形成数量。VEGF在体外对GDMEC有显著的促进TLS形成作用,且呈量-效和时-效关系;VEGF对ECV304细胞形成小管样结构的诱导作用弱。结论GDMEC在体外保持了内皮细胞特征和活跃的血管生成特性,对VEGF的反应性较ECV304好,因而GDMEC更适合体外血管生成研究。     

GM-CSF对诱导人血管内皮细胞血管形成的影响及VEGF的作用

目的： 研究炎性因子粒细胞-巨噬细胞集落刺激因子（GM-CSF）对诱导人血管内皮细胞血管形成的影响及血管内皮生长因子（VEGF）的作用，为探讨GM-CSF和VEGF与动脉粥样硬化斑块内血管新生及斑块稳定性之间的关系提供实验基础。方法： 在 Matrigel上诱导人脐带静脉内皮细胞（HUVECs）形成管腔结构，从而建立稳定的血管形成的体外培养体系，然后施加实验因素。分别检测rhGM-CSF的浓度效应和时间效应，及加入VEGF165的作用。然后各实验组用CD34免疫细胞化学染色，光学显微镜下计数各组管腔数。最后用统计学方法进行分析。结果： 应用Matrigel可在体外诱导培养的HUVECs形成管腔结构。rhGM-CSF作用后，培养体系的管腔数逐渐增多，呈剂量及时间依赖效应；加入VEGF165后，管腔数显著增多。结论： 应用Matrigel可在体外诱导培养的HUVECs形成管腔结构。GM-CSF可以促进体外诱导人血管内皮细胞血管形成，并在一定范围内呈剂量及时间依赖效应。VEGF可以促进体外诱导人血管内皮细胞血管形成。     

内皮克隆形成细胞旁分泌对人脐静脉内皮细胞生物学功能的影响北大核心

背景:研究表明,内皮克隆形成细胞移植对缺血损伤组织的血管新生具有促进作用。然而,这一作用是否与其旁分泌效应有关,仍有待进一步研究证实。目的:检测人脐血来源内皮克隆形成细胞条件培养基中细胞因子分泌谱,并观察内皮克隆形成细胞条件培养基对人脐静脉内皮细胞增殖、迁移及成管能力的影响。方法:从人脐血中分离、培养内皮克隆形成细胞,并进行细胞鉴定。采用抗体芯片对无血清内皮克隆形成细胞条件培养基中的细胞因子进行检测。采用无血清EBM-2培养基作为对照组,应用CCK-8、细胞划痕实验、Matrigel成管实验检测内皮克隆形成细胞条件培养基对人脐静脉内皮细胞增殖、迁移及成管能力的影响。结果与结论:(1)原代培养细胞形态:培养的细胞呈"铺路石"样生长,表达CD34,KDR及CD144,不表达CD45及CD133,Dil-acLDL摄取及FITC-UEA-I结合双阳性,在Matrigel基质胶中可形成管腔样结构,以上均符合内皮克隆形成细胞的特征;(2)抗体芯片检测:内皮克隆形成细胞条件培养基高表达30种促血管新生因子;(3)CCK-8检测:实验组人脐静脉内皮细胞在24,48,72 h增殖活性均高于对照组(P<0.01);(4)细胞划痕实验结果显示,实验组人脐静脉内皮细胞迁移率在12,24 h均高于对照组(P<0.01);(5)与对照组相比,实验组人脐静脉内皮细胞在Matrigel基质胶上可形成更多的管状结构(P<0.01)。(6)结果表明:内皮克隆形成细胞能通过旁分泌效应促进成熟内皮细胞的生物活性。     

小鼠肺微血管内皮细胞的培养鉴定及其血管形成功能的研究

目的: 建立一种简单有效的小鼠肺微血管内皮细胞(PMVECs)原代培养方法,并对其体外血管形成功能进行研究。方法: 取小于1周龄的C57BL/6小鼠的肺组织边缘,采用组织贴块法培养原代PMVECs。经形态学观察、免疫细胞化学鉴定后,以每孔2×10⁴的密度接种于铺有基质胶的96孔细胞板,在倒置显微镜下观察(2 h 1次)其24 h 体外血管形成过程。结果: 镜下可见原代培养的PMVECs呈梭形或多角形,单层融合呈铺路石样。细胞抗Ⅷ因子相关抗原(ⅧF-Ag)染色阳性。免疫荧光显微镜下可见大部分细胞摄取四甲基吲哚碳花青标记的乙酰化低密度脂蛋白(DiI-Ac-LDL),胞质呈现红色荧光,细胞膜表面与异硫氰酸荧光素标记的异植物血凝素(FITC-BSI)结合,呈现黄绿色荧光。PMVECs接种4~6 h后出现明显的管腔结构,10~12 h呈蜂窝状结构,此后管腔结构逐渐减少。结论: 组织贴块法培养原代PMVECs操作简单,细胞得率和纯度高,并可在体外成功建立血管形成模型进行相关研究。     

辛二酰苯胺氧肟酸对血管生成的抑制作用及其机制

目的研究辛二酰苯胺氧肟酸(SAHA)对人脐静脉内皮细胞(HUVEC)生物学特性的影响及对血管生成的作用。方法 CCK-8法检测SAHA对HUVEC增殖能力的影响。TranswellTM小室法、基质胶体外成管实验、Western blot法、基质胶体内血管生成实验分别观察15μmol/L SAHA处理HUVEC 48 h后HUVEC迁移能力的变化;HUVEC在基质胶上形成管腔样结构的能力;HUVEC细胞中血管内皮生长因子(VEGF)信号通路相关蛋白表达的变化以及小鼠体内基质胶栓中新生血管的数量。结果 SAHA能够抑制HUVEC的增殖,抑制作用呈剂量、时间依赖性;与对照组相比较,SAHA处理组迁移过膜的HUVEC细胞数明显降低;HUVEC形成的管腔样结构SAHA处理组明显少于对照组;SAHA抑制HUVEC中VEGF相关信号通路;SAHA处理后小鼠体内的基质胶栓中新生的血管数明显少于对照组。结论 SAHA能够抑制HUVEC增殖及体内外血管形成能力,并且其可能机制是SAHA阻断了VEGF相关的信号通路。     

pp60(c-src) modulates microvascular endothelial phenotype and in vitro angiogenesis.

The tyrosine kinase c-src associates with the platelet-derived growth factor (PDGF) receptor. Overexpression of wild-type c-src, a kinase-negative c-src mutant, and v-src in microvascular endothelial cells modulated the mitogenic effect of PDGF, suggesting that c-src kinase activity inhibits PDGF signals. Analyses of cell morphology in two-dimensional culture revealed changes in cell shape and size induced by the overexpression of c-src proteins. Investigations in three-dimensional culture unveiled a modulatory role of c-src during in vitro angiogenesis. Overexpression of c-src resulted in an increased diameter of tube-like structures, and the number of branching segments was decreased. Expression of the kinase-negative c-src mutant resulted in abortive tube formation consisting of disconnected multicellular fragments. These results indicate that the c-src tyrosine kinase exerts regulatory effects on endothelial proliferation, size, and cytoskeletal organization in two-dimensional culture and on the formation of a differentiated multicellular network in three-dimensional culture.     

黄芪注射液对体外血管新生的影响

背景：血管新生受生长因子的影响,黄芪可与血管内皮生长因子具有协同促血管新生的功效,但机制尚不明确。 目的：通过与单一血管内皮生长因子干预比较,观察中药黄芪对体外血管新生的作用机制。 方法：将黄芪注射液及血管内皮生长因子作用于SD大鼠胸主动脉内皮细胞,应用细胞增殖、细胞迁移、小管形成实验观察黄芪注射液对体外血管新生的促进作用,用Western blot实验检测血管内皮生长因子的表达。 结果与结论：黄芪能明显促进大鼠胸主动脉内皮细胞的增殖(P < 0.01),迁移的细胞数增加(P < 0.01),胸主动脉内皮细胞的小管形成数增加(P < 0.01),并明显促进内皮细胞血管内皮生长因子的表达(P < 0.01)。说明黄芪能明显促进内皮细胞增殖、细胞迁移、小管形成,具有显著的促进体外血管新生作用,其机制可能是通过增加血管内皮生长因子的表达而实现的。     

A new model of vasculogenesis and angiogenesis in vitro as compared with vascular growth in the avian area vasculosa

In cultures of dissociated quail epiblast the basic constituents of the vascular system, blood cells and endothelial cells can be induced by basic fibroblast growth factor (Flamme and Risau, Development, 116:435–439, 1992). As we show here, in those cultures three types of vascular plexus differentiate spontaneously under different culture conditions: At the 3rd day a vascular plexus appears in situ closely resembling the vascular plexus of the quail area opaca vasculosa (vasculogenesis). Vascular sprouts are formed, extending long filopodia at their tips. Such filopodia are shown to build the first intervascular bridges in the growing vascular plexus of the area vasculosa at embryonic day 3. Connections of filopodia turn out to be precursors of new capillaries interconnecting pre-existing blood vessels (angiogenesis). Two further types of in vitro capillary plexus differentiate in long term endothelial cell cultures derived from induced angioblasts. Whereas one closely resembles so-called angiogenesis in vitro, the third type comprises mainly multinucleated giant endothelial cells lining loop like capillaries and represents a differentiation of aging endothelial cell culture. Thus, the present in vitro model is an approach to the sequence of angioblast induction, vasculogenesis, and angiogenesis. © 1993 Wiley-Liss, Inc.     

Endometrial microvascular growth in normal and dysfunctional states

As a tissue that exhibits rapid cyclical growth and shedding throughout the reproductive life of the female, human endometrium provides a good model for the study of normal physiological angiogenesis. The objective of this paper is to summarize recent data on endometrial vascular growth, present new data on regional variability in endothelial cell proliferation within the endometrium, and interpret this information in light of current knowledge of the mechanisms by which angiogenesis occurs. Conventional angiogenesis normally involves a series of steps which include endothelial cell activation, breakdown of the basement membrane, migration and proliferation of the endothelial cell, fusion of sprouts, and tube formation. Other mechanisms by which angiogenesis occurs include intussusception and vessel elongation. Using immunohistochemical techniques we have shown repeatedly that levels of endothelial cell proliferation within human endometrium do not show any consistent pattern across the different stages of the menstrual cycle, which is unexpected since significant vascular growth must occur during the proliferative phase, when the endometrium increases in thickness by up to 4-fold. There are two possible explanations for this; either there is no obligatory link between endometrial endothelial cell proliferation and new vessel formation, or there is significant variation in endothelial cell proliferation within different regions of the same uterus. Multiple samples from hysterectomy specimens subsequently demonstrated that the variability is due to real differences between individuals, as well as showing that the endothelial cell proliferation index is significantly elevated in functionalis compared with basalis. During these studies we observed that endothelial cell proliferation nearly always appeared inside existing endometrial vessels, rather than be associated with structures that could be identified as vascular sprouts. To explore further whether sprout formation occurs during endometrial angiogenesis, we investigated the immunohistochemical distribution of integrin alphavbeta3 on endometrial endothelial cells. As for endothelial cell proliferation, integrin alphavbeta3 immunostaining was seen only on endothelial cells that appeared within existing blood vessels. The results from these studies have major implications for our understanding of the mechanisms that control endometrial angiogenesis. The lack of correlation between menstrual cycle stage and endothelial cell proliferation index, or endothelial cell expression of integrin alphavbeta3, suggests that vascular growth is not under the overall control of oestrogen and progesterone.     

血管内皮细胞对骨髓基质细胞促成骨作用的研究

在骨组织工程研究中 ,因营养血管长入材料非常缓慢而影响材料深部的成骨作用一直是困扰科研人员的难题之一。骨髓基质细胞能分泌血管内皮生长因子 (VEGF) ,内皮细胞可以产生骨形态发生蛋白 (BMP) ,因此我们设想将骨髓基质细胞和内皮细胞联合种植在生物材料上构建组织工程化骨 ,则可能在促进成骨的同时 ,又促进局部血管生成 ,满足成骨过程的营养需要。在本实验中我们比较了内皮细胞培养液作用下的骨髓基质细胞、经诱导的骨髓基质细胞和未处理的骨髓基质细胞之间碱性磷酸酶 (AL P)活性和骨钙素 (OCN)分泌量的差别 ,结果表明内皮细胞培养液作用下的骨髓基质细胞和经诱导的骨髓基质细胞之间碱性磷酸酶活性和骨钙素分泌量无统计学差异 ,但均明显高于未处理的骨髓基质细胞 (P<0 .0 1) ,说明内皮细胞培养液中的分泌因子对骨髓基质细胞具有促成骨作用 ,可以达到和成骨诱导液相同的效果。     

Inhibition of platelet-derived growth factor promotes pericyte loss and angiogenesis in ischemic retinopathy

We investigated whether inhibition of platelet-derived growth factor (PDGF) receptor tyrosine kinase activity would affect pericyte viability, vascular endothelial growth factor (VEGF)/vascular endothelial growth factor receptor-2 (VEGFR-2) expression and angiogenesis in a model of retinopathy of prematurity (ROP). ROP was induced in Sprague Dawley rats by exposure to 80% oxygen from postnatal (P) days 0 to 11 (with 3 hours/day in room air), and then room air from P12-18 (angiogenesis period). Shams were neonatal rats in room air from P0-18. STI571, a potent inhibitor of PDGF receptor tyrosine kinase, was administered from P12-18 at 50 or 100 mg/kg/day intraperitoneal (i.p.). Electron microscopy revealed that pericytes in the inner retina of both sham and ROP rats appeared normal; however STI571 induced a selective pericyte and vascular smooth muscle degeneration. Immunolabeling for caspase-3 and alpha-smooth muscle cell actin in consecutive paraffin sections of retinas confirmed that these degenerating cells were apoptotic pericytes. In all groups, VEGF and VEGFR-2 gene expression was located in ganglion cells, the inner nuclear layer, and retinal pigment epithelium. ROP was associated with an increase in both VEGF and VEGFR-2 gene expression and blood vessel profiles in the inner retina compared to sham rats. STI571 at both doses increased VEGF and VEGFR-2 mRNA and exacerbated angiogenesis in ROP rats, and in sham rats at 100 mg/kg/day. In conclusion, PDGF is required for pericyte viability and the subsequent prevention of VEGF/VEGFR-2 overexpression and angiogenesis in ROP.     

Enhancing microvascular formation and vessel maturation through temporal control over multiple pro-angiogenic and pro-maturation factors

Therapeutic stimulation of angiogenesis to re-establish blood flow in ischemic tissues offers great promise as a treatment for patients suffering from cardiovascular disease or trauma. Since angiogenesis is a complex, multi-step process, different signals may need to be delivered at appropriate times in order to promote a robust and mature vasculature. The effects of temporally regulated presentation of pro-angiogenic and pro-maturation factors were investigated in vitro and in vivo in this study. Pro-angiogenic factors vascular endothelial growth factor (VEGF) and angiopoietin 2 (Ang2) cooperatively promoted endothelial sprouting and pericyte detachment in a three-dimensional in vitro EC-pericyte co-culture model. Pro-maturation factors platelet-derived growth factor B (PDGF) and angiopoietin 1 (Ang1) inhibited the early stages of VEGF- and Ang2-mediated angiogenesis if present simultaneously with VEGF and Ang2, but promoted these behaviors if added subsequently to the pro-angiogenesis factors. VEGF and Ang2 were also found to additively enhance microvessel density in a subcutaneous model of blood vessel formation, while simultaneously administered PDGF/Ang1 inhibited microvessel formation. However, a temporally controlled scaffold that released PDGF and Ang1 at a delay relative to VEGF/Ang2 promoted both vessel maturation and vascular remodeling without inhibiting sprouting angiogenesis. Our results demonstrate the importance of temporal control over signaling in promoting vascular growth, vessel maturation and vascular remodeling. Delivering multiple growth factors in combination and sequence could aid in creating tissue engineered constructs and therapies aimed at promoting healing after acute wounds and in chronic conditions such as diabetic ulcers and peripheral artery disease.     

转录因子Bach1对人微血管内皮细胞的作用研究

 目的:研究转录因子Bach1对人微血管内皮细胞功能的影响。方法: 利用小干扰RNA（small interfering RNA,siRNA）细胞转染技术下调内皮细胞Bach1表达;用Matrigel管腔形成实验检测内皮细胞体外血管新生的能力;用Transwell小室法检测细胞迁移;用CCK-8法测定细胞增殖;用实时荧光定量PCR、Western blotting和ELISA法检测细胞中血红素氧合酶1（heme oxygenase 1,HO-1）和血管内皮细胞生长因子（vascular endothelial growth factor, VEGF）mRNA 和蛋白的表达情况;用转染报告基因的方法检测VEGF基因的转录活性。结果: 下调内皮细胞Bach1表达明显促进人微血管内皮细胞迁移和管腔形成能力,对内皮细胞增殖能力无明显影响;抑制Bach1表达促进内皮细胞HO-1 mRNA 和蛋白的表达,增加VEGF 转录活性及mRNA和蛋白的表达。结论: 抑制转录因子Bach1表达可增加内皮细胞HO-1和VEGF的表达,促进人微血管内皮细胞迁移和管腔形成,提示Bach1是负性调控血管新生的因子。     

Platelet-derived growth factor indirectly stimulates angiogenesis in vitro.

We evaluated the effect of platelet-derived growth factor (PDGF) on capillary formation using an in vitro angiogenesis model system in which microvascular fragments and myofibroblasts (Mfs) isolated from rat epididymal lipid tissues were grown in co-culture. In this system Mfs induce capillary formation by producing an endothelial cell growth factor and by secreting extracellular matrix components that cause endothelial cells to form cordlike structures. Addition of PDGF enhances in vitro capillary growth. Although some recently described microvascular endothelial cells display PDGF receptors and respond to PDGF, we found no evidence for direct PDGF action on the rat epididymal microvascular endothelial cells. Rather, we found that PDGF increased the proliferation of Mfs, as well as the production of Mf-derived endothelial cell growth factor and matrix collagen type I. Our results suggest that even in cases where the microvasculature lacks PDGF receptors, PDGF may accelerate capillary formation by activating connective tissue cells in the vicinity of endothelial cells.     

前列腺素E1联合碱性成纤维细胞生长因子干预人牙髓干细胞增殖和血管生成能力的变化

文题释义：前列腺素E1：是一种生物活性物质,广泛存在于体内各组织细胞,由BERGSRTOEM等于1960年首先分离获得,并详细研究了其分子结构,具有舒张血管、稳定细胞膜降低血小板黏附率、改善血液黏度及抗炎等作用,可促进骨髓间充质干细胞和神经干细胞的增殖、迁移,并促进细胞分泌血管内皮生长因子,进而促进血管生成。碱性成纤维细胞生长因子：是一种肝素黏合多肽,也是一种重要的潜在有丝分裂原,属于成纤维细胞生长因子家族,对细胞有丝分裂及分化具有很强的调节作用,特别是对中胚层和神经外胚层来源的细胞作用更强,可促进细胞生长,研究发现牙髓中的成纤维细胞可表达碱性成纤维细胞生长因子,在体外能明显促进人牙髓干细胞增殖。  摘要背景：前列腺素E1及碱性成纤维细胞生长因子可促使人牙髓干细胞增殖,但两者联合应用对人牙髓干细胞增殖和血管生成能力的影响还未见研究。目的：探究前列腺素E1联合碱性成纤维细胞生长因子对人牙髓干细胞增殖和血管生成能力的影响。方法：①体外分离培养人牙髓干细胞,经表面标志物检测鉴定后,分别以5,10,20,50,100 μg/L前列腺素E1及5,10,20,50,100 μg/L碱性成纤维细胞生长因子单独作用于体外培养的人牙髓干细胞,以未加药物处理的细胞作为空白对照组,采用CCK-8法分别在1,2,3 d检测人牙髓干细胞增殖情况,筛选最佳药物作用质量浓度和时间。②将体外培养的人牙髓干细胞分为4组：空白对照组、前列腺素E1组、碱性成纤维细胞生长因子组、前列腺素E1+碱性成纤维细胞生长因子组,采用CCK-8法检测人牙髓干细胞增殖情况,然后提取人牙髓干细胞条件培养基,以ELISA测定条件培养基中血管内皮生长因子、内皮抑素水平,以小管形成实验检测人牙髓干细胞条件培养基干预后人脐静脉血管内皮细胞的体外小管形成能力。结果与结论：①前列腺素E1、碱性成纤维细胞生长因子的最佳作用质量浓度均为20 μg/L,最佳作用时间为2 d;②与空白对照组相比,前列腺素E1组、碱性成纤维细胞生长因子组、前列腺素E1+碱性成纤维细胞生长因子组人牙髓干细胞相对增殖率、血管内皮生长因子水平、人脐静脉血管内皮细胞体外血管生成能力均显著升高(P < 0.05),内皮抑素水平显著降低(P < 0.05);前列腺素E1+碱性成纤维细胞生长因子组上述各指标均优于前列腺素E1组、碱性成纤维细胞生长因子组(P < 0.05);③结果表明,前列腺素E1联合碱性成纤维细胞生长因子可促进人牙髓干细胞增殖,增强人脐静脉血管内皮细胞体外小管形成能力。 ORCID: 0000-0002-7727-1883(项海东) 中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程