Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

目的 研究Omi/HtrA2在新生儿窒息后血清诱导人近曲肾小管上皮细胞(HK-2)凋亡时的作用机制.方法 以HK-2细胞为研究对象,实验分为空白对照组、窒息组、Ucf-101(Omi/HtrA2的特异性阻断剂)干预组.以体积分数为20%的窒息后24 h血清作为攻击血清,以终浓度为10/μmol/L的Ucf-101对窒息组进行干预.用激光共聚焦显微镜观测Omi/HtrA2在胞内的转位状况,采用流式细胞仪检测各组细胞凋亡率.结果 窒息血清攻击后,Omi/HtrA2由线粒体转位到胞质中,阳性转位细胞率较空白对照组明显增加[(28.1±3.6)%比(9.4±2.1)%,P<0.013].与空白对照组比较,窒息组细胞凋亡率明显增加[(36.3±4.4)%比(12.45±2.9)%,P<0.013].与窒息组比较,干预组细胞凋亡率明显减少((27.0±3.9)%比(36.3±4.4)%,P<0.01].结论 窒息后新生儿血清诱导HK-2细胞凋亡,Omi/HtrA2由线粒体转位到线粒体外,在其胞内凋亡信号转导过程中占有重要作用.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.     

Omi/HtrA2在窒息后血清诱导人近曲肾小管皮细胞凋亡中的作用

Objective To investigate the mechanism of inducing apoptosis of Omi/HtrA2 in renal tubular cells with postasphyxial serum of neonate. Methods Human renal proximal tubular cell line HK-2 cell was used as target cell. They were divided into three groups: control group, asphyxia group and Ucf-101 (Omi/HtrA2 special inhibitor) treated group. The challenge concentration of serum obtained from neonates 24 hours after asphyxia was 20%,and the treatment concentration of Ucf-101 was 10 μmol/L.The Omi/HtrA2 translocation in renal tubular cells was observed with confocal microscopy, and the rate of apoptosis was detected with flow cytometer. Results It was found that Omi/HtrA2 was translocated into cytoplasm in asphyxia group, and the rate of Omi/HtrA2 translocation in HK-2 cells of asphyxia group was significantly increased [(28. 1 % vs. (9.4±2.1)%, P<0. 01]. Compared with the control group, after being treated with postasphyxial serum, the rate of apoptosis of HK-2 cells in asphyxia group wa ssignificantly increased [(36. 3±4. 4)% vs. (12. 4±2. 9) %, P<0. 01]. Compared with asphyxia group, the rate of apoptosis in HK-2 cells in Ucf-101 treated group was significantly decreased [(27. 0± 3. 9)% vs. (36.3±4.4) %, P<0. 01]. Conclusion These experimental data demonstrates that postasphyxial serum of neonate can induce apoptosis of HK-2 cells, and translocation of Omi/HtrA2 from mitochondria into cyto-plasm may play an important role in its intracellular signal transduetion mechanism in induction of apoptosis.