AIM: To investigate the expression of Fos and Jun proteins in rat brains after focal cerebral ischemia followed by reperfusion and effects of RSM and astragus.METHODS: 30 SD adult male rats were divided into 5 groups ...AIM: To investigate the expression of Fos and Jun proteins in rat brains after focal cerebral ischemia followed by reperfusion and effects of RSM and astragus.METHODS: 30 SD adult male rats were divided into 5 groups at random .Group A:sham operated group;Group B:model group;Group C:treated with RSM;Group D:treated with astragus;Group E:treated with RSM and astragus.The immunohistochemistry and medical image processing system(MIPS)were used to measure the numbers and mean grey levels of Fos and Jun protein positive cells in rat cerebral cortex of 5 groups. RESULTS: (1) In cerebral cortex of group B ,C ,D ,E,the numbers of Fos and Jun positive cells were more than those in group A and mean grey levels of Fos and Jun positive cells were lower than those in group A(P< 0.01);(2) In cerebral cortex of ischemic sides in group C,D,E,the numbers of Fos and Jun positive cells were less than those in group B and mean grey levels of Fos and Jun positive cells were higher than those in group B(P< 0.01) ;(3) Group E had more significant effects than group C or group D (P< 0.01). CONCLUSION: The expression of Fos protein and Jun protein in model group increased significantly,compared with sham operated group;RSM ,astragus ,RSM and astragus all could inhibit partly the expression of Fos protein and Jun protein after cerebral ischemia and reperfusion;Prescription of RSM and astragus had stronger inhibiting effects than RSM or astragus.It may be one of mechanisms that ischemic stoke is treated by reinforcing Qi and activating blood circulation therapy in TCM clinic.展开更多
Jun二聚化蛋白-2(Jun dimerization protein-2,JDP2)是转录因子复合体AP-1的抑制性组分。JDP2能形成同源二聚体或与c-Jun、JunB、JunD、ATF-2等形成异源二聚体,抑制AP-1的转录激活作用。同时JDP2还能募集组蛋白去乙酰基酶,或直接与组蛋...Jun二聚化蛋白-2(Jun dimerization protein-2,JDP2)是转录因子复合体AP-1的抑制性组分。JDP2能形成同源二聚体或与c-Jun、JunB、JunD、ATF-2等形成异源二聚体,抑制AP-1的转录激活作用。同时JDP2还能募集组蛋白去乙酰基酶,或直接与组蛋白结合,抑制组蛋白的乙酰化,通过改变染色质结构调控基因转录。J D P2通过在D N A、染色质多个水平调控基因的转录,在细胞的多种生理或病理活动中发挥着重要作用。展开更多
AIM:To investigate the role of c-Jun N-terminal kinase(JNK) in thermotherapy-induced apoptosis in human gastric cancer SGC-7901 cells.METHODS:Human gastric cancer SGC-7901 cells were cultured in vitro.Following thermo...AIM:To investigate the role of c-Jun N-terminal kinase(JNK) in thermotherapy-induced apoptosis in human gastric cancer SGC-7901 cells.METHODS:Human gastric cancer SGC-7901 cells were cultured in vitro.Following thermotherapy at 43 ℃ for 0,0.5,1,2 or 3 h,the cells were cultured for a further 24 h with or without the JNK specific inhibitor,SP600125 for 2 h.Apoptosis was evaluated by immunohistochemistry [terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL)] and flow cytometry(Annexin vs propidium iodide).Cell proliferation was determined by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide.The production of p-JNK,Bcl-2,Bax and caspase-3 proteins was evaluated by Western blotting.The expression of JNK at mRNA level was determined by reverse transcription polymerase chain reaction.RESULTS:The proliferation of gastric carcinoma SGC-7901 cells was significantly inhibited following thermotherapy,and was 32.7%,30.6%,43.8% and 52.9% at 0.5,1,2 and 3 h post-thermotherapy,respectively.Flow cytometry analysis revealed an increased population of SGC790l cells in G0/G1 phase,but a reduced population in S phase following thermotherapy for 1 or 2 h,compared to untreated cells(P < 0.05).The increased number of SGC-790l cells in G0/G1 phase was consistent with induced apoptosis(flow cytometry) following thermotherapy for 0.5,1,2 or 3 h,compared to the untreated group(46.5% ± 0.23%,39.9% ± 0.53%,56.6% ± 0.35% and 50.4% ± 0.29% vs 7.3% ± 0.10%,P < 0.01),respectively.This was supported by the TUNEL assay(48.2% ± 0.4%,40.1% ± 0.2%,61.2% ± 0.29% and 52.0% ± 0.42% vs 12.2% ± 0.22%,P < 0.01) respectively.More importantly,the expression of p-JNK protein and JNK mRNA levels were significantly higher at 0.5 h than at 0 h post-treatment(P < 0.01),and peaked at 2 h.A similar pattern was detected for Bax and caspase-3 proteins.Bcl-2 increased at 0.5 h,peaked at 1 h,and then decreased.Furthermore,the JNK specific inhibitor,SP600125,suppressed p-JNK,Bax and caspase-3 at the protein level in SGC790l cells following thermotherapy,compared to mock-inhibitor treatment,which was in line with the decreased rate of apoptosis.The expression of Bcl-2 was consistent with thermotherapy alone.CONCLUSION:Thermotherapy induced apoptosis in gastric cancer cells by promoting p-JNK at the mRNA and protein levels,and up-regulated the expression of Bax and caspase-3 proteins.Bcl-2 may play a protective role during thermotherapy.Activation of JNK via the Bax-caspase-3 pathway may be important in thermotherapy-induced apoptosis in gastric cancer cells.展开更多
The effect of Batroxobin on expression of c-Jun in left temporal ischemic rats with spatial memory disorder was investigated by means of Morri's water maze and immunohistochemistry methods. The results showed that...The effect of Batroxobin on expression of c-Jun in left temporal ischemic rats with spatial memory disorder was investigated by means of Morri's water maze and immunohistochemistry methods. The results showed that the mean reaction time and distance of temporal ischemic rats for searching a goal were significantly longer than those of sham-operated rats, and at the same time c-Jun expression of left temporal ischemic region was significantly increased. However, the mean reaction time and distance of Batroxobin-treated rats were shorter and they used normal strategies more often and earlier than those of ischemic rats. The number of c-Jun immune reactive cells of Batroxobin-treated rats was also less than that of ischemic group. In conclusion, Batroxobin can improve spatial memory disorder in temporal ischemic rats, and the down-regulation of the expression of c-Jun is probably related to the neuroprotective mechanism.展开更多
文摘AIM: To investigate the expression of Fos and Jun proteins in rat brains after focal cerebral ischemia followed by reperfusion and effects of RSM and astragus.METHODS: 30 SD adult male rats were divided into 5 groups at random .Group A:sham operated group;Group B:model group;Group C:treated with RSM;Group D:treated with astragus;Group E:treated with RSM and astragus.The immunohistochemistry and medical image processing system(MIPS)were used to measure the numbers and mean grey levels of Fos and Jun protein positive cells in rat cerebral cortex of 5 groups. RESULTS: (1) In cerebral cortex of group B ,C ,D ,E,the numbers of Fos and Jun positive cells were more than those in group A and mean grey levels of Fos and Jun positive cells were lower than those in group A(P< 0.01);(2) In cerebral cortex of ischemic sides in group C,D,E,the numbers of Fos and Jun positive cells were less than those in group B and mean grey levels of Fos and Jun positive cells were higher than those in group B(P< 0.01) ;(3) Group E had more significant effects than group C or group D (P< 0.01). CONCLUSION: The expression of Fos protein and Jun protein in model group increased significantly,compared with sham operated group;RSM ,astragus ,RSM and astragus all could inhibit partly the expression of Fos protein and Jun protein after cerebral ischemia and reperfusion;Prescription of RSM and astragus had stronger inhibiting effects than RSM or astragus.It may be one of mechanisms that ischemic stoke is treated by reinforcing Qi and activating blood circulation therapy in TCM clinic.
文摘Jun二聚化蛋白-2(Jun dimerization protein-2,JDP2)是转录因子复合体AP-1的抑制性组分。JDP2能形成同源二聚体或与c-Jun、JunB、JunD、ATF-2等形成异源二聚体,抑制AP-1的转录激活作用。同时JDP2还能募集组蛋白去乙酰基酶,或直接与组蛋白结合,抑制组蛋白的乙酰化,通过改变染色质结构调控基因转录。J D P2通过在D N A、染色质多个水平调控基因的转录,在细胞的多种生理或病理活动中发挥着重要作用。
基金Supported by A grant from the National Eleventh Five-Year Technology Support Project of China,No. 2008 BAI68B01
文摘AIM:To investigate the role of c-Jun N-terminal kinase(JNK) in thermotherapy-induced apoptosis in human gastric cancer SGC-7901 cells.METHODS:Human gastric cancer SGC-7901 cells were cultured in vitro.Following thermotherapy at 43 ℃ for 0,0.5,1,2 or 3 h,the cells were cultured for a further 24 h with or without the JNK specific inhibitor,SP600125 for 2 h.Apoptosis was evaluated by immunohistochemistry [terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL)] and flow cytometry(Annexin vs propidium iodide).Cell proliferation was determined by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide.The production of p-JNK,Bcl-2,Bax and caspase-3 proteins was evaluated by Western blotting.The expression of JNK at mRNA level was determined by reverse transcription polymerase chain reaction.RESULTS:The proliferation of gastric carcinoma SGC-7901 cells was significantly inhibited following thermotherapy,and was 32.7%,30.6%,43.8% and 52.9% at 0.5,1,2 and 3 h post-thermotherapy,respectively.Flow cytometry analysis revealed an increased population of SGC790l cells in G0/G1 phase,but a reduced population in S phase following thermotherapy for 1 or 2 h,compared to untreated cells(P < 0.05).The increased number of SGC-790l cells in G0/G1 phase was consistent with induced apoptosis(flow cytometry) following thermotherapy for 0.5,1,2 or 3 h,compared to the untreated group(46.5% ± 0.23%,39.9% ± 0.53%,56.6% ± 0.35% and 50.4% ± 0.29% vs 7.3% ± 0.10%,P < 0.01),respectively.This was supported by the TUNEL assay(48.2% ± 0.4%,40.1% ± 0.2%,61.2% ± 0.29% and 52.0% ± 0.42% vs 12.2% ± 0.22%,P < 0.01) respectively.More importantly,the expression of p-JNK protein and JNK mRNA levels were significantly higher at 0.5 h than at 0 h post-treatment(P < 0.01),and peaked at 2 h.A similar pattern was detected for Bax and caspase-3 proteins.Bcl-2 increased at 0.5 h,peaked at 1 h,and then decreased.Furthermore,the JNK specific inhibitor,SP600125,suppressed p-JNK,Bax and caspase-3 at the protein level in SGC790l cells following thermotherapy,compared to mock-inhibitor treatment,which was in line with the decreased rate of apoptosis.The expression of Bcl-2 was consistent with thermotherapy alone.CONCLUSION:Thermotherapy induced apoptosis in gastric cancer cells by promoting p-JNK at the mRNA and protein levels,and up-regulated the expression of Bax and caspase-3 proteins.Bcl-2 may play a protective role during thermotherapy.Activation of JNK via the Bax-caspase-3 pathway may be important in thermotherapy-induced apoptosis in gastric cancer cells.
文摘The effect of Batroxobin on expression of c-Jun in left temporal ischemic rats with spatial memory disorder was investigated by means of Morri's water maze and immunohistochemistry methods. The results showed that the mean reaction time and distance of temporal ischemic rats for searching a goal were significantly longer than those of sham-operated rats, and at the same time c-Jun expression of left temporal ischemic region was significantly increased. However, the mean reaction time and distance of Batroxobin-treated rats were shorter and they used normal strategies more often and earlier than those of ischemic rats. The number of c-Jun immune reactive cells of Batroxobin-treated rats was also less than that of ischemic group. In conclusion, Batroxobin can improve spatial memory disorder in temporal ischemic rats, and the down-regulation of the expression of c-Jun is probably related to the neuroprotective mechanism.
