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时间:2020-03-07
《人胎盘间充质干细胞对小鼠肺纤维化的影响及机制_吴树才_杨永辉_李辉_郭素敏_李秀.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、本文摘自医药前沿yyqyzz.com人胎盘间充质干细胞对小鼠肺纤维化的影响及机制11112222吴树才,杨永辉,李辉,郭素敏,李秀武,杜杰杰,宋利超,高莉(1河北省胸科医院,石家庄050041;2河北师范大学生命科学学院)摘要:目的观察人胎盘间充质干细胞对小鼠肺纤维化的影响,并探讨其作用机制。方法采用组织块贴壁法分离并体外培养人胎盘间充质干细胞。将30只C57BL/6小鼠随机均分为观察组、对照组,均给予气管内注入博来霉素8.5mg/kg建立肺纤维化模型。造模成功后,观察组尾静脉输注体外培养的人胎
2、盘间充质干细胞0.3mL6(细胞数为1.0×10个),对照组注射等量生理盐水,1次/d,连续注射3天;处死小鼠,取肺组织,检测肺组织羟脯氨酸含量,采用Westernblotting法检测肺组织血管内皮生长因子(VEGF)、内皮素1(ET-1)和血管生成素2(Ang-2)蛋白。结果观察组肺组织羟脯氨酸含量为(5.76±0.13)μg/mL,对照组为(8.13±0.87)μg/mL,两组比较P<0.01。观察组肺组织VEGF的相对表达量为52.7±4.7、ET-1为68.1±5.4、Ang-2为59
3、.6±2.8,均较对照组(100)降低(P均<0.05)。结论人胎盘间充质干细胞可抑制小鼠肺组织纤维化形成;降低肺组织VEGF、ET-1和Ang-2表达可能是其作用机制。关键词:肺纤维化;胎盘间充质干细胞;博来霉素;血管内皮生长因子;内皮素1;血管生成素2;小鼠doi:10.3969/j.issn.1002-266X.2016.12.004中图分类号:R563文献标志码:A文章编号:1002-266X(2016)12-0013-03Effectofplacenta-derivedmesenchy
4、malstemcellsonpulmonaryfibrosisinmiceanditsmechanism1WUShucai,YANGYonghui,LIHui,GUOSumin,LIXiuwu,DUJiejie,SONGLichao,GAOLi(1HebeiProvinceChestHospital,Shijiazhuang050041,China)Abstract:ObjectiveToobservetheeffectofplacenta-derivedmesenchymalstemcells
5、onthepulmonaryfibrosisinmiceandtoexploreitsmechanism.MethodsHumanplacenta-derivedmesenchymalstemcellswereisolatedandculturedinvitrobytissueexplantsadherentmethod.ThirtyC57BL/6micewererandomlydividedintotheobservationgroupandthecontrolgroup,andallmice
6、wereinjectedwith8.5mg/kgtoestablishthemodelofpulmonaryfibrosis.Afterthemodelsweresuccessfulestablished,miceintheobservationgroupreceivedintravenousinjectionofplacenta-derivedmesenchymalstemcells0.3mL(cellnumberof1.0×106),andmiceinthecontrolgroupwerei
7、njectedwiththesameamountofnor-malsaline,onceadayfor3days.Then,themicewerekilledtocollectthelungtissuestodeterminethecontentofhydroxyproline.Theexpressionofvascularendothelialgrowthfactor(VEGF),endothelin1(ET-1)andangiogenin2(Ang-2)proteinswasdetermin
8、edbyWesternblotting.ResultsThehydroxyprolinecontentsinthelungtissueofobserva-tiongroupandcontrolgroupwererespectively(5.76±0.13)μ/mLand(8.13±0.87)μg/mL,andsignificantdifferencewasfoundbetweenthetwogroups(P<0.01).TheexpressionofVEGF,ET-1andAng-2inthel
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