中国病理生理杂志
中國病理生理雜誌
중국병리생리잡지
CHINESE JOURNAL OF PATHOPHYSIOLOGY
2014年
9期
1603-1609
,共7页
沈慧%尹雅玲%李超堃%赵红岗%马洁%李东亮
瀋慧%尹雅玲%李超堃%趙紅崗%馬潔%李東亮
침혜%윤아령%리초곤%조홍강%마길%리동량
腺苷三磷酸%嘌呤能P2X7 受体%PC12细胞%膜孔%亮蓝G
腺苷三燐痠%嘌呤能P2X7 受體%PC12細胞%膜孔%亮藍G
선감삼린산%표령능P2X7 수체%PC12세포%막공%량람G
Adenosine triphosphate%Purinergic P2X7 receptor%PC12 cells%Membrane pore%Brilliant blue G
目的:探讨外源性三磷酸腺苷( ATP)诱导PC12细胞的膜孔形成及关键分子靶标。方法:用不同浓度的ATP处理培养的PC12细胞,采用倒置相差显微镜观察形态,CCK-8法检测细胞存活率,YO-PRO-1染色检测细胞膜通透性,Western blotting和real-time PCR检测P2X7受体和pannexin 1(Panx1)表达的变化。结果:(1)ATP(1 mmol/L、3 mmol/L、5 mmol/L)作用3 h,可见随着ATP浓度升高,PC12细胞变圆,脱壁细胞增多;当ATP浓度为3 mmol/L或5 mmol/L时,PC12细胞活力较对照组显著下降(P<0.05)。(2)不同浓度的ATP(0、1、3、5 mmol/L)作用1 h,PC12细胞摄入YO-PRO-1的荧光强度随着浓度增加而增加;同一浓度的ATP作用不同时间(15、30、60 min),随着时间的增加,胞内的荧光强度也增加。(3)亮蓝G(P2X7受体的抑制剂)预处理可明显拮抗ATP引起的细胞活力下降和胞内荧光强度增强(P<0.05),而生胃酮(Panx1的抑制剂)预处理不改变细胞活力和胞内的荧光强度(P>0.05)。(4)ATP作用3 h使PC12细胞 P2X7受体的mRNA和蛋白表达明显升高(P<0.05),而Panx1 mRNA和蛋白表达变化不大(P>0.05)。结论:胞外高浓度ATP引起PC12细胞的膜孔形成可能主要与P2X7受体的表达和激活有关。
目的:探討外源性三燐痠腺苷( ATP)誘導PC12細胞的膜孔形成及關鍵分子靶標。方法:用不同濃度的ATP處理培養的PC12細胞,採用倒置相差顯微鏡觀察形態,CCK-8法檢測細胞存活率,YO-PRO-1染色檢測細胞膜通透性,Western blotting和real-time PCR檢測P2X7受體和pannexin 1(Panx1)錶達的變化。結果:(1)ATP(1 mmol/L、3 mmol/L、5 mmol/L)作用3 h,可見隨著ATP濃度升高,PC12細胞變圓,脫壁細胞增多;噹ATP濃度為3 mmol/L或5 mmol/L時,PC12細胞活力較對照組顯著下降(P<0.05)。(2)不同濃度的ATP(0、1、3、5 mmol/L)作用1 h,PC12細胞攝入YO-PRO-1的熒光彊度隨著濃度增加而增加;同一濃度的ATP作用不同時間(15、30、60 min),隨著時間的增加,胞內的熒光彊度也增加。(3)亮藍G(P2X7受體的抑製劑)預處理可明顯拮抗ATP引起的細胞活力下降和胞內熒光彊度增彊(P<0.05),而生胃酮(Panx1的抑製劑)預處理不改變細胞活力和胞內的熒光彊度(P>0.05)。(4)ATP作用3 h使PC12細胞 P2X7受體的mRNA和蛋白錶達明顯升高(P<0.05),而Panx1 mRNA和蛋白錶達變化不大(P>0.05)。結論:胞外高濃度ATP引起PC12細胞的膜孔形成可能主要與P2X7受體的錶達和激活有關。
목적:탐토외원성삼린산선감( ATP)유도PC12세포적막공형성급관건분자파표。방법:용불동농도적ATP처리배양적PC12세포,채용도치상차현미경관찰형태,CCK-8법검측세포존활솔,YO-PRO-1염색검측세포막통투성,Western blotting화real-time PCR검측P2X7수체화pannexin 1(Panx1)표체적변화。결과:(1)ATP(1 mmol/L、3 mmol/L、5 mmol/L)작용3 h,가견수착ATP농도승고,PC12세포변원,탈벽세포증다;당ATP농도위3 mmol/L혹5 mmol/L시,PC12세포활력교대조조현저하강(P<0.05)。(2)불동농도적ATP(0、1、3、5 mmol/L)작용1 h,PC12세포섭입YO-PRO-1적형광강도수착농도증가이증가;동일농도적ATP작용불동시간(15、30、60 min),수착시간적증가,포내적형광강도야증가。(3)량람G(P2X7수체적억제제)예처리가명현길항ATP인기적세포활력하강화포내형광강도증강(P<0.05),이생위동(Panx1적억제제)예처리불개변세포활력화포내적형광강도(P>0.05)。(4)ATP작용3 h사PC12세포 P2X7수체적mRNA화단백표체명현승고(P<0.05),이Panx1 mRNA화단백표체변화불대(P>0.05)。결론:포외고농도ATP인기PC12세포적막공형성가능주요여P2X7수체적표체화격활유관。
AIM:To investigate the formation of membrane pore in PC 12 cells induced by exogenous adenosine triphosphate ( ATP) and to identify the key molecular targets .METHODS:PC12 cells were treated with different concen-trations of ATP to establish the injury model .The morphological change was observed under an inverted phase -contrast mi-croscope.The viability of the PC12 cells was measured by CCK-8 assay.Fluorescent dye YO-PRO-1 was used to detect the membrane permeability.The expression of P2X7 receptor and pannexin 1 (Panx1) at mRNA and protein levels was as-sessed by real-time PCR and Western blotting .RESULTS:After exposed to ATP (1 mmol/L, 3 mmol/L and 5 mmol/L) for 3 h, the PC12 cells became edematous , and the number of adherent cells decreased gradually in a dose-dependent man-ner .The cell viabilities in 3 mmol/L ATP group and 5 mmol/L ATP group were significantly decreased compared with con-trol group (P<0.05).YO-PRO-1 uptake in the PC12 cells exposed to ATP (0, 1, 3 and 5 mmol/L) for 15 min, 30 min and 60 min increased in a dose-dependent and time-dependent manner .The cell viability increased and the intracellular fluorescence intensity induced by ATP were significantly antagonized in brilliant blue G ( a P2X7 receptor inhibitor ) pre-treatment group (P<0.05), whereas it did not change in carbenoxolone (a Panx1 inhibitor) pretreatment group (P>0. 05).The expression of P2X7 receptor at mRNA and protein levels was significantly increased (P<0.05), but the expres-sion of Panx1 was not changed ( P>0.05) when PC12 cells were exposed to ATP for 3 h.CONCLUSION:Extracellular ATP at high concentration may induce membrane pore formation with the expression and activation of P 2X7 receptor in PC12 cells.