中山大学附属第五医院,广东省生物医学影像重点实验室//广东省分子影像工程研究中心,广东 珠海 519000
邓昭华,硕士,研究方向:血管生物学,E-mail: dengzhh37@mail2.sysu.edu.cn
收稿:2022-04-08,
纸质出版:2022-09-20
移动端阅览
邓昭华,董影影,李颍雯等.整合素β4调控脑血管发育[J].中山大学学报(医学科学版),2022,43(05):738-747.
DENG Zhao-hua,DONG Ying-ying,LI Ying-wen,et al.Integrin β4 Regulates Cerebral Vascular Development in Zebrafish[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(05):738-747.
邓昭华,董影影,李颍雯等.整合素β4调控脑血管发育[J].中山大学学报(医学科学版),2022,43(05):738-747. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0507.
DENG Zhao-hua,DONG Ying-ying,LI Ying-wen,et al.Integrin β4 Regulates Cerebral Vascular Development in Zebrafish[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(05):738-747. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0507.
目的
2
探讨整合素β4(ITGB4)对脑血管生长发育的调控作用。
方法
2
通过逆转录PCR(RT-PCR)检测靶向
itgb4
mRNA序列的吗啉环(MO)在斑马鱼胚胎中的敲低效果。利用体视显微镜和激光共聚焦显微镜(laser scanning confocal microscope, LSCM)观察抑制
itgb4
表达后,斑马鱼胚胎脑部血管的发育变化。通过在斑马鱼胚胎中注射4,6-联脒-2-苯基吲哚(DAPI)染料检测血脑屏障(BBB)发育的完整性。使用小干扰RNA(small interfering RNA, siRNA)在永生化人脑微血管内皮细胞(hCMEC/D3)中敲低
ITGB4
,用蛋白免疫印迹(WB)检测其敲低效果。通过活细胞成像分析仪(IncuCyte®)、基质胶(Matrigel® matrix)成管实验和transwell迁移实验分别检测ITGB4在hCMEC/D3中调控细胞增殖、成管和迁移的作用。应用实时荧光定量PCR(qRT-PCR)检测敲低
itgb4
后Wnt/β-catenin信号通路下游靶基因表达变化。
结果
2
在斑马鱼胚胎中敲降
itgb4
引起脑水肿、脑部出血、血脑屏障形成障碍以及后脑血管数量减少等相关表型。细胞实验结果显示,在hCMEC/D3细胞中抑制
ITGB4
的表达导致细胞增殖减缓,管腔形成减少及迁移能力减弱。此外,qRT-PCR结果表明,在斑马鱼胚胎中敲低
itgb4
抑制Wnt/β-catenin通路下游靶基因的表达。最后,在hCMEC/D3细胞中敲低
ITGB4
后,通过添加Wnt/β-catenin通路激活剂(BML-284)能明显挽回迁移减少的表型。
结论
2
ITGB4通过调节脑血管内皮细胞的增殖、迁移和成管等功能促进脑血管发育并参与调控血脑屏障的形成。
Objective
2
To explore the effect of integrin β4 (ITGB4) on cerebrovascular development.
Methods
2
We confirmed the knock down effect of morpholino (MO) targeting
itgb4
mRNA sequence on zebrafish embryos by using RT-PCR. Upon the knockdown effect of
itgb4
in zebrafish embryos by MO, we observed the phenotypes of cerebrovascular development via laser scanning confocal microscope and stereomicroscope. To examine the integrity of blood-brain barrier (BBB), we injected the DAPI to the zebrafish embryos. To detect the functional changes of cerebrovascular endothelial cells, we inhibited the expression of ITGB4 by siRNA and confirmed the knockdown effect by western blot (WB). To inspect the role of
ITGB4
in brain microvascular endothelial cell (hCMEC/D3), we performed cell proliferation assay, tube formation assay and cell migration assay on
ITGB4
knock-down cells. We used qRT-PCR to detect the change of the downstream target genes in the Wnt/β-catenin pathway upon the knockdown effect of
itgb4.
Results
2
Itgb4
knocked down by MO resulted in dramatic defects in the zebrafish embryos, including brain edema, brain hemorrhage, blood-brain barrier dysfunction and reduction of the number of the central arteries (CtAs) in hindbrain. Downregulation of ITGB4
protein expression
in hCMEC/D3 disrupted the cell function, including the suppression of cellular proliferation, the reduction of the tube formation and the inhibition of cellular migration. In addition, the downstream target genes in the Wnt/β-catenin signal pathway were suppressed since the downregulation of
itgb4
expression in zebrafish embryos. Finally, the reduction of the cells migration after knocking down the
ITGB4
could be rescued when we add the activator (BML-284) of the Wnt/β-catenin signal pathway to the hCMEC/D3 cells.
Conclusions
2
ITGB4 promotes the development of cerebrovascular by regulating cellular proliferation, migration and tube formation of cerebral vascular endothelial cells, and plays an important role in regulating the formation of blood-brain barrier.
YA K , DA C . Chapter 22: Structural and signaling functions of integrins [J]. Biochim Biophys Acta Biomembr , 2020 , 1862 ( 5 ): 183206 .
Harburger DS , Calderwood DA . Integrin signalling at a glance [J]. J Cell Sci , 2009 , 122 ( Pt 2 ): 159 - 163 .
Barczyk M , Carracedo S , Gullberg . D. Integrins [J]. Cell Tissue Res , 2010 , 339 ( 1 ): 269 - 280 .
Edwards DN , Bix GJ . Roles of blood-brain barrier integrins and extracellular matrix in stroke [J]. Am J Physiol Cell Physiol , 2019 , 316 ( 2 ): C252 - C263 .
Mezu-Ndubuisi OJ , Maheshwari A . The role of integrins in inflammation and angiogenesis [J]. Pediatr Res , 2021 , 89 ( 7 ): 1619 - 1626 .
Engelhardt B . β1-integrin/matrix interactions support blood-brain barrier integrity [J]. J Cereb Blood Flow Metab , 2011 , 31 ( 10 ): 1969 - 1971 .
Iida A , Wang Z , Sehara-Fujisawa A . Disruption of integrin α4 in zebrafish leads to cephalic hemorrhage during development [J]. Genes Genet Syst , 2019 , 94 ( 4 ): 177 - 179 .
Dowling J , Yu QC , Fuchs E . Beta4 integrin is required for hemidesmosome formation, cell adhesion and cell survival [J]. J Cell Biol , 1996 , 134 ( 2 ): 559 - 572 .
Guo W , Pylayeva Y , Pepe A , et al . Beta 4 integrin amplifies ErbB2 signaling to promote mammary tumorigenesis [J]. Cell , 2006 , 126 ( 3 ): 489 - 502 .
Du X , Yang Y , Yang M , et al . ITGB4 deficiency induces mucus hypersecretion by upregulating MUC5AC in RSV-infected airway epithelial cells [J]. Int J Biol Sci , 2022 , 18 ( 1 ): 349 - 359 .
Ephstein Y , Singleton PA , Chen W , et al . Critical role of S1PR1 and integrin β4 in HGF/c-Met-mediated increases in vascular integrity [J]. J Biol Chem , 2013 , 288 ( 4 ): 2191 - 2200 .
Welser-Alves JV , Boroujerdi A , Tigges U , et al . Endothelial β4 integrin is predominantly expressed in arterioles, where it promotes vascular remodeling in the hypoxic brain [J]. Arterioscler Thromb Vasc Biol , 2013 , 33 ( 5 ): 943 - 953 .
Milner R , Campbell IL . Increased expression of the beta4 and alpha5 integrin subunits in cerebral blood vessels of transgenic mice chronically producing the pro-inflammatory cytokines IL-6 or IFN-alpha in the central nervous system [J]. Mol Cell Neurosci , 2006 , 33 ( 4 ): 429 - 440 .
Welser JV , Halder SK , Kant R , et al . Endothelial α6β4 integrin protects during experimental autoimmune encephalomyelitis-induced neuroinflammation by maintaining vascular integrity and tight junction protein expression [J]. J Neuroinflammation , 2017 , 14 ( 1 ): 217 .
Karamysheva AF . Mechanisms of angiogenesis [J]. Biochemistry (Mosc) , 2008 , 73 ( 7 ): 751 - 762 .
Satzer D , Tao JX , Issa NP , et al . Stereotactic laser interstitial thermal therapy for epilepsy associated with solitary and multiple cerebral cavernous malformations [J]. Neurosurg Focus , 2020 , 48 ( 4 ): E12 .
Schuss P , Marx J , Borger V , et al . Cavernoma-related epilepsy in cavernous malformations located within the temporal lobe: surgical management and seizure outcome [J]. Neurosurg Focus , 2020 , 48 ( 4 ): E6 .
Kim BS , Sarma D , Lee SK , et al . Brain edema associated with unruptured brain arteriovenous malformations [J]. Neuroradiology , 2009 , 51 ( 5 ): 327 - 335 .
Walcott BP , Peterson RT . Zebrafish models of cerebrovascular disease [J] J Cereb Blood Flow Metab , 2014 , 34 ( 4 ): 571 - 577 .
Kugler EC , Frost J , Silva V , et al . Zebrafish vascular quantification: a tool for quantification of three-dimensional zebrafish cerebrovascular architecture by automated image analysis [J]. Development , 2022 , 149 ( 3 ): dev199720 .
Corti P , Young S , Chen CY , et al . Interaction between alk1 and blood flow in the development of arteriovenous malformations [J]. Development , 2011 , 138 ( 8 ): 1573 - 1582 .
Iida A , Wang Z , Hirata H , et al . Integrin β1 activity is required for cardiovascular formation in zebrafish [J]. Genes Cells , 2018 , 23 ( 11 ): 938 - 951 .
Vanhollebeke B , Stone OA , Bostaille N , et al . Tip cell-specific requirement for an atypical Gpr124- and Reck-dependent Wnt/β-catenin pathway during brain angiogenesis [J]. eLife , 2015 , 4 .
Shi WK , Shang QL , Zhao YF . SPC25 promotes hepatocellular carcinoma metastasis via activating the FAK/PI3K/AKT signaling pathway through ITGB4 [J]. Oncol Rep , 2022 , 47 ( 5 ).
Coultas L , Chawengsaksophak K , Rossant J . Endothelial cells and VEGF in vascular development [J]. Nature , 2005 , 438 ( 7070 ): 937 - 945 .
Groulx JF , Giroux V , Beauséjour M , et al . Integrin α6A splice variant regulates proliferation and the Wnt/β-catenin pathway in human colorectal cancer cells [J]. Carcinogenesis , 2014 , 35 ( 6 ): 1217 - 1227 .
0
浏览量
423
下载量
1
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621
