中国病理生理杂志
中國病理生理雜誌
중국병리생리잡지
CHINESE JOURNAL OF PATHOPHYSIOLOGY
2015年
1期
59-63
,共5页
吕倩影%周建华%杨凤杰%蒲金赟%张瑜
呂倩影%週建華%楊鳳傑%蒲金赟%張瑜
려천영%주건화%양봉걸%포금빈%장유
自噬%足细胞%亚溶量C5 b-9
自噬%足細胞%亞溶量C5 b-9
자서%족세포%아용량C5 b-9
Autophagy%Podocytes%Sublytic C5b-9
目的:通过亚溶量补体C5b-9(sC5b-9)攻击足细胞的离体模型,探讨自噬在免疫介导足细胞损伤过程中的作用。方法:建立sC5b-9攻击足细胞体外模型,采用单丹磺酰尸胺(MDC)染色标记自噬泡,瑞氏-吉姆萨染色光镜下观察细胞形态,免疫荧光检测nephrin的表达及分布,Western blotting 检测LC3-II和LC3-I的表达,MTT法检测细胞存活率,Annexin V/PI双染法流式细胞术检测细胞凋亡。结果:成功建立sC5b-9攻击足细胞体外模型,将细胞溶破率≤5%定义为亚溶量攻击。 MDC染色和自噬标志LC3-II的检测均显示造模后48 h足细胞的自噬活动明显活跃。抑制自噬可明显加重sC5b-9所致的足细胞形态异常。 sC5b-9攻击可使足细胞nephrin的表达量明显减少,并且异常分布,而抑制自噬可进一步下调nephrin的表达。抑制自噬可促进sC5b-9所诱导的足细胞凋亡。结论:sC5b-9可直接诱导足细胞自噬活动增强,而自噬则在sC5b-9介导的足细胞损伤过程中发挥着保护作用。
目的:通過亞溶量補體C5b-9(sC5b-9)攻擊足細胞的離體模型,探討自噬在免疫介導足細胞損傷過程中的作用。方法:建立sC5b-9攻擊足細胞體外模型,採用單丹磺酰尸胺(MDC)染色標記自噬泡,瑞氏-吉姆薩染色光鏡下觀察細胞形態,免疫熒光檢測nephrin的錶達及分佈,Western blotting 檢測LC3-II和LC3-I的錶達,MTT法檢測細胞存活率,Annexin V/PI雙染法流式細胞術檢測細胞凋亡。結果:成功建立sC5b-9攻擊足細胞體外模型,將細胞溶破率≤5%定義為亞溶量攻擊。 MDC染色和自噬標誌LC3-II的檢測均顯示造模後48 h足細胞的自噬活動明顯活躍。抑製自噬可明顯加重sC5b-9所緻的足細胞形態異常。 sC5b-9攻擊可使足細胞nephrin的錶達量明顯減少,併且異常分佈,而抑製自噬可進一步下調nephrin的錶達。抑製自噬可促進sC5b-9所誘導的足細胞凋亡。結論:sC5b-9可直接誘導足細胞自噬活動增彊,而自噬則在sC5b-9介導的足細胞損傷過程中髮揮著保護作用。
목적:통과아용량보체C5b-9(sC5b-9)공격족세포적리체모형,탐토자서재면역개도족세포손상과정중적작용。방법:건립sC5b-9공격족세포체외모형,채용단단광선시알(MDC)염색표기자서포,서씨-길모살염색광경하관찰세포형태,면역형광검측nephrin적표체급분포,Western blotting 검측LC3-II화LC3-I적표체,MTT법검측세포존활솔,Annexin V/PI쌍염법류식세포술검측세포조망。결과:성공건립sC5b-9공격족세포체외모형,장세포용파솔≤5%정의위아용량공격。 MDC염색화자서표지LC3-II적검측균현시조모후48 h족세포적자서활동명현활약。억제자서가명현가중sC5b-9소치적족세포형태이상。 sC5b-9공격가사족세포nephrin적표체량명현감소,병차이상분포,이억제자서가진일보하조nephrin적표체。억제자서가촉진sC5b-9소유도적족세포조망。결론:sC5b-9가직접유도족세포자서활동증강,이자서칙재sC5b-9개도적족세포손상과정중발휘착보호작용。
AIM:In podocytes , autophagy occurs at a high basal level and dysregulated autophagy is associa -ted with a variety of podocytopathies .This paper is to investigate the role of autophagy in sublytic C 5b-9-induced podocyte injury.METHODS: Sublytic complement C5b-9 stimulation was used as an in vitro model.Autophagosomes were con-firmed using monodansylcadaverine (MDC) staining.Immunoblotting was used to measure the change of autophagy-related markers.Cellular morphological changes were observed by Wright-Giemsa staining.Immunofluorescence staining and con-focal microscopy were used to detect the expression and distribution of nephrin .The cell viability was assessed by methylth-iazol tetrazolium (MTT) assay.The cell apoptosis was assessed by Annexin V-fluorescein isothiocyanate/PI staining.RE-SULTS:For ensuring sublytic complement injury , the maximal amounts of anti-podocyte antiserum and 160 ×-diluted nor-mal human serum were used without inducing cell lysis (defined as >5%LDH release).Sublytic C5b-9 promoted autoph-agy of podocytes in vitro.The proautophagic effect of sublytic C 5b-9 manifested in the form of accumulated MDC-labeled vesicles and enhanced the expression of LC 3-Ⅱ.Autophagy inhibitor 3-methyladenosine (3-MA) promoted sublytic C5b-9-induced podocyte morphological abnormalities .Compared with the sublytic C5b-9-injured podocytes, 3-MA exposure further decreased the expression of nephrin .3-MA enhanced sublytic C5b-9-induced podocyte apoptosis .CONCLUSION: Sub-lytic C5b-9 attack induces autophagy , which may play a protective role against complement-mediated podocyte injury .