中华微生物学和免疫学杂志
中華微生物學和免疫學雜誌
중화미생물학화면역학잡지
CHINESE JOURNAL OF MICROBIOLOGY AND IMMUNOLOGY
2014年
4期
294-298
,共5页
牛瑞兵%冯建涛%金麟%李存保
牛瑞兵%馮建濤%金麟%李存保
우서병%풍건도%금린%리존보
心脏病%β1 肾上腺素能受体自身抗体%激光扫描共聚焦显微镜%原子力显微镜
心髒病%β1 腎上腺素能受體自身抗體%激光掃描共聚焦顯微鏡%原子力顯微鏡
심장병%β1 신상선소능수체자신항체%격광소묘공취초현미경%원자력현미경
Heart disease%β1-AR autoantibody%Laser scanning confocal microscopy%Atomic force microscopy
目的:测定β1肾上腺素能受体(β1-AR)自身抗体对单个心室肌细胞微区力和细胞内钙离子浓度变化的影响,在细胞和分子水平上探讨β1-AR自身抗体导致心脏疾病的机制。方法利用原子力显微镜( AFM)和激光扫描共聚焦显微镜( LSCM)组合成的联合成像系统对结合β1-AR自身抗体前后的急性分离单个大鼠心室肌细胞微区力进行测定,同时观察心室肌细胞收缩频率以及细胞内钙离子浓度的变化。结果(1)β1-AR自身抗体与单个心室肌细胞结合后细胞微区力和细胞收缩频率均增大。结合前原子力F=(44~51) nN,收缩频率为(0.17±0.04) Hz;结合后原子力F=(76~82) nN,收缩频率为(0.40±0.03) Hz;结合前后心室肌细胞收缩频率差异有统计学意义(P<0.05)。(2)结合抗体后与结合抗体前相比,细胞收缩时钙离子荧光相对吸光度值增加的幅度明显升高(154.3%±16.7%vs 102.1%±12.3%,P<0.01)。结论β1-AR自身抗体引起心室肌细胞收缩频率、细胞微区力、细胞内钙离子浓度的改变。
目的:測定β1腎上腺素能受體(β1-AR)自身抗體對單箇心室肌細胞微區力和細胞內鈣離子濃度變化的影響,在細胞和分子水平上探討β1-AR自身抗體導緻心髒疾病的機製。方法利用原子力顯微鏡( AFM)和激光掃描共聚焦顯微鏡( LSCM)組閤成的聯閤成像繫統對結閤β1-AR自身抗體前後的急性分離單箇大鼠心室肌細胞微區力進行測定,同時觀察心室肌細胞收縮頻率以及細胞內鈣離子濃度的變化。結果(1)β1-AR自身抗體與單箇心室肌細胞結閤後細胞微區力和細胞收縮頻率均增大。結閤前原子力F=(44~51) nN,收縮頻率為(0.17±0.04) Hz;結閤後原子力F=(76~82) nN,收縮頻率為(0.40±0.03) Hz;結閤前後心室肌細胞收縮頻率差異有統計學意義(P<0.05)。(2)結閤抗體後與結閤抗體前相比,細胞收縮時鈣離子熒光相對吸光度值增加的幅度明顯升高(154.3%±16.7%vs 102.1%±12.3%,P<0.01)。結論β1-AR自身抗體引起心室肌細胞收縮頻率、細胞微區力、細胞內鈣離子濃度的改變。
목적:측정β1신상선소능수체(β1-AR)자신항체대단개심실기세포미구력화세포내개리자농도변화적영향,재세포화분자수평상탐토β1-AR자신항체도치심장질병적궤제。방법이용원자력현미경( AFM)화격광소묘공취초현미경( LSCM)조합성적연합성상계통대결합β1-AR자신항체전후적급성분리단개대서심실기세포미구력진행측정,동시관찰심실기세포수축빈솔이급세포내개리자농도적변화。결과(1)β1-AR자신항체여단개심실기세포결합후세포미구력화세포수축빈솔균증대。결합전원자력F=(44~51) nN,수축빈솔위(0.17±0.04) Hz;결합후원자력F=(76~82) nN,수축빈솔위(0.40±0.03) Hz;결합전후심실기세포수축빈솔차이유통계학의의(P<0.05)。(2)결합항체후여결합항체전상비,세포수축시개리자형광상대흡광도치증가적폭도명현승고(154.3%±16.7%vs 102.1%±12.3%,P<0.01)。결론β1-AR자신항체인기심실기세포수축빈솔、세포미구력、세포내개리자농도적개변。
Objective To evaluate the effects of β1 adrenergic receptor (β1-AR) autoantibodies on the micro-mechanics of a single rat ventricular myocyte and the concentration of intracellular calcium for investigating the pathogenic mechanism of heart disease caused by β1-AR autoantibody on both cellular and molecular levels .Methods The micro-mechanics of an acutely isolated single myocardial cell from rat was detected by using the atomic force microscopy ( AFM) in combination with laser scanning confocal micro-scope (LSCM) before and after binding to β1-AR autoantibodies.The ventricular myocyte contraction and the intracellular calcium concentration were observed as well .Results The micro-mechanics of a single ventricular myocyte was increased from (44-51) nN to (76-82) nN after binding to β1-AR autoantibodies. Its contraction frequency was also increased from (0.17±0.04) Hz to (0.40±0.03) Hz (P<0.05).More-over, the intracellular calcium fluorescence intensity was increased significantly during contraction in com -parison with that before binding to β1-AR autoantibodies [ ( 102.1 ±12.3 ) % vs ( 154.3 ±16.7 ) %, P<0.01 ] .Conclusion β1-AR autoantibody could affect the contraction and the micro-mechanics of ventricu-lar myocytes and the intracellular calcium concentration in ventricular myocytes .