中华放射医学与防护杂志
中華放射醫學與防護雜誌
중화방사의학여방호잡지
Chinese Journal of Radiological Medicine and Protection
2015年
3期
171-176
,共6页
孙威%倪新初%孙苏平%蔡雷铭%于静萍%王坚%聂斌%孙志强%倪昕晔
孫威%倪新初%孫囌平%蔡雷銘%于靜萍%王堅%聶斌%孫誌彊%倪昕曄
손위%예신초%손소평%채뢰명%우정평%왕견%섭빈%손지강%예흔엽
脂肪来源干细胞%骨骼肌%放射性纤维化%TGF-β1%兔模型
脂肪來源榦細胞%骨骼肌%放射性纖維化%TGF-β1%兔模型
지방래원간세포%골격기%방사성섬유화%TGF-β1%토모형
Adipose-derived stem cells%Skeletal muscle%Radiation fibrosis%TGF-β1%Rabbit model
目的 观察脂肪来源干细胞(adipose-derive stem cells,ASCs)植入放射损伤骨骼肌后的纤维化程度改变,探讨ASCs对兔骨骼肌放射性纤维化的影响.方法 64只新西兰兔单侧臀部予9 MeV电子线单次照射80 Gy后,采用随机数字表法分为ASCs组和PBS组,每组32只,照射24 h后照射侧分别肌肉注射1 ml含5×107 ASCs的PBS悬液和1 ml PBS缓冲液,未照射一侧作为各组的正常对照.分别于照射后1、4、8和26周,收集各组8只实验动物肌肉标本,计算Masson染色切片胶原纤维面积占总面积的比值,利用免疫组织化学及Western blot法检测骨骼肌中TGF-β1蛋白的表达.结果 ASCs植入骨骼肌后能在放射损伤部位迁移.ASCs组及PBS组纤维化程度随照射后时间延长而加重,ASCs组胶原纤维面积占总面积的比值较PBS组在照射后4、8和26周显著降低(t=4.62、5.99和10.48,P<0.05).ASCs组骨骼肌组织TGF-β1的IOD值较PBS组在照射后4、8和26周显著降低(=3.79、16.45和15.17,P<0.05).Western blot检测ASCs组TGF-β1蛋白的表达水平较PBS组低.结论 ASCs移植能抑制放射损伤骨骼肌组织TGF-β1的表达减轻放射性纤维化.
目的 觀察脂肪來源榦細胞(adipose-derive stem cells,ASCs)植入放射損傷骨骼肌後的纖維化程度改變,探討ASCs對兔骨骼肌放射性纖維化的影響.方法 64隻新西蘭兔單側臀部予9 MeV電子線單次照射80 Gy後,採用隨機數字錶法分為ASCs組和PBS組,每組32隻,照射24 h後照射側分彆肌肉註射1 ml含5×107 ASCs的PBS懸液和1 ml PBS緩遲液,未照射一側作為各組的正常對照.分彆于照射後1、4、8和26週,收集各組8隻實驗動物肌肉標本,計算Masson染色切片膠原纖維麵積佔總麵積的比值,利用免疫組織化學及Western blot法檢測骨骼肌中TGF-β1蛋白的錶達.結果 ASCs植入骨骼肌後能在放射損傷部位遷移.ASCs組及PBS組纖維化程度隨照射後時間延長而加重,ASCs組膠原纖維麵積佔總麵積的比值較PBS組在照射後4、8和26週顯著降低(t=4.62、5.99和10.48,P<0.05).ASCs組骨骼肌組織TGF-β1的IOD值較PBS組在照射後4、8和26週顯著降低(=3.79、16.45和15.17,P<0.05).Western blot檢測ASCs組TGF-β1蛋白的錶達水平較PBS組低.結論 ASCs移植能抑製放射損傷骨骼肌組織TGF-β1的錶達減輕放射性纖維化.
목적 관찰지방래원간세포(adipose-derive stem cells,ASCs)식입방사손상골격기후적섬유화정도개변,탐토ASCs대토골격기방사성섬유화적영향.방법 64지신서란토단측둔부여9 MeV전자선단차조사80 Gy후,채용수궤수자표법분위ASCs조화PBS조,매조32지,조사24 h후조사측분별기육주사1 ml함5×107 ASCs적PBS현액화1 ml PBS완충액,미조사일측작위각조적정상대조.분별우조사후1、4、8화26주,수집각조8지실험동물기육표본,계산Masson염색절편효원섬유면적점총면적적비치,이용면역조직화학급Western blot법검측골격기중TGF-β1단백적표체.결과 ASCs식입골격기후능재방사손상부위천이.ASCs조급PBS조섬유화정도수조사후시간연장이가중,ASCs조효원섬유면적점총면적적비치교PBS조재조사후4、8화26주현저강저(t=4.62、5.99화10.48,P<0.05).ASCs조골격기조직TGF-β1적IOD치교PBS조재조사후4、8화26주현저강저(=3.79、16.45화15.17,P<0.05).Western blot검측ASCs조TGF-β1단백적표체수평교PBS조저.결론 ASCs이식능억제방사손상골격기조직TGF-β1적표체감경방사성섬유화.
Objective To investigate the effects of adipose-derived stem cell (ASC) transplantation on radiation-induced skeletal muscle fibrosis in New Zealand rabbits.Methods Totally 64 rabbits were irradiated at unilateral hip with a single dose of 80 Gy of 9 MeV electrons generated from a linear accelerator and then were randomly divided into ASCs group and PBS group with 32 abbits in each group.The non-irradiated side with normal skeletal muscle was used as control.At 24 after irradiation,1 ml PBS containing 5 × 107ASCs labbed with CM-Dil or 1 ml PBS was injected into the skeletal muscle in the irradiated side of these two groups,respectively.At 1,4,8 and 26 weeks after irradiation,the skeletal muscles of 8 rabbits in each group were collected.Masson staining was used to evaluate the level of skeletal muscle fibrosis.The expression of transforming growth factor β1 (TGF-β1) in the skeletal muscle tissues was evaluated by immunohistochemical method (IHC) and Western blot.Results The fluorescence tracing method showed that ASCs could migrate in the injured muscle and fibrosis was more serious in the PBS group.The proportion of the area of collagen fibers to the total area in sections of ASCs group was lowcr than that of PBS groups at 4,8 and 26 weeks after irradiation (t-4.62,5.99,10.48,P < 0.05).The expression level of TGF-β1 protein in the ASCs group was significantly lower than that in the PBS groups at4,8 and 26 weeks after irradiation(t=3.79,16.45,15.17,P<0.05).Conclusions ASC transplantation could alleviate radiation fibrosis by down-regulating the level of TGF-β1 protein in the irradiated skeletal muscle.