家兔动脉粥样硬化与血小板源内皮型氧化氮合酶表达的相关性

Objective To explore the correlation of atheroselerosis progression and the expression of platelet derived endothelial nitric oxide synthase (eNOS) in rabbits. Methods A total of 24 male New Zealand white rabbits were used in this study. Six of the animals were fed with normal food (control group). Eighteen rabbits were fed with cholesterol-rich food (1 g/d) for 12 weeks to establish the atherosclerosis model. Among 18 models, 6 rabbits were executed immediately and their aorta and platelet samples were collected for further analysis (model group), 6 rabbits were orally administered with pravastatin (10 rag/d) for additional 12 weeks (treated group), and the remaining 6 rabbits were left untreated until the end of the study (untreated group). The control, treated and untreated animals were then killed, and the aorta and platelet samples were collected for eNOS expression analysis (RT-PCR). Results The aorta samples in model and untreated group exhibited rough intima and a lot of longitudinal fatty streaks, which indicated that atherosclerosis models were established successfully. While in treated group, the degree of atherosclerosis was decreased. The average percent of thickness of fatty streaks or atheroselerotic plaques relative to the whole thickness of vessel walls was 0. 04±0. 02, 0. 82±0. 16, 0. 33±0. 18,0. 77±0. 14 in control, model, treated and untreated group, respectively. The thickness of fatty streaks or atherosclerotic plaques was significantly increased in the model and untreated groups and decreased in treated group compared with the control group (both P<0. 05). The expressions of platelet derived eNOS/mRNA were 1. 02± 0. 28, 0. 41± 0. 27, 1.00 ± 0. 77, 0. 40±0. 29 in control, model, treated and untreated group, respectively. The expression of eNOS/mRNA was markedly decreased in model group and untreated group compared with the control group, but was increased in treated group compared with untreated and model groups (F=3. 544, P = 0. 024). Conclusions There is a negative correlation between eNOS expression and atherosclerosis development, which suggests that the reversal effect of pravastatin on atheroselerosis progression and plaque formation may relate to the expression of platelet derived eNOS.     

家兔动脉粥样硬化与血小板源内皮型氧化氮合酶表达的相关性

Objective To explore the correlation of atheroselerosis progression and the expression of platelet derived endothelial nitric oxide synthase (eNOS) in rabbits. Methods A total of 24 male New Zealand white rabbits were used in this study. Six of the animals were fed with normal food (control group). Eighteen rabbits were fed with cholesterol-rich food (1 g/d) for 12 weeks to establish the atherosclerosis model. Among 18 models, 6 rabbits were executed immediately and their aorta and platelet samples were collected for further analysis (model group), 6 rabbits were orally administered with pravastatin (10 rag/d) for additional 12 weeks (treated group), and the remaining 6 rabbits were left untreated until the end of the study (untreated group). The control, treated and untreated animals were then killed, and the aorta and platelet samples were collected for eNOS expression analysis (RT-PCR). Results The aorta samples in model and untreated group exhibited rough intima and a lot of longitudinal fatty streaks, which indicated that atherosclerosis models were established successfully. While in treated group, the degree of atherosclerosis was decreased. The average percent of thickness of fatty streaks or atheroselerotic plaques relative to the whole thickness of vessel walls was 0. 04±0. 02, 0. 82±0. 16, 0. 33±0. 18,0. 77±0. 14 in control, model, treated and untreated group, respectively. The thickness of fatty streaks or atherosclerotic plaques was significantly increased in the model and untreated groups and decreased in treated group compared with the control group (both P<0. 05). The expressions of platelet derived eNOS/mRNA were 1. 02± 0. 28, 0. 41± 0. 27, 1.00 ± 0. 77, 0. 40±0. 29 in control, model, treated and untreated group, respectively. The expression of eNOS/mRNA was markedly decreased in model group and untreated group compared with the control group, but was increased in treated group compared with untreated and model groups (F=3. 544, P = 0. 024). Conclusions There is a negative correlation between eNOS expression and atherosclerosis development, which suggests that the reversal effect of pravastatin on atheroselerosis progression and plaque formation may relate to the expression of platelet derived eNOS.     

家兔动脉粥样硬化与血小板源内皮型氧化氮合酶表达的相关性

Objective To explore the correlation of atheroselerosis progression and the expression of platelet derived endothelial nitric oxide synthase (eNOS) in rabbits. Methods A total of 24 male New Zealand white rabbits were used in this study. Six of the animals were fed with normal food (control group). Eighteen rabbits were fed with cholesterol-rich food (1 g/d) for 12 weeks to establish the atherosclerosis model. Among 18 models, 6 rabbits were executed immediately and their aorta and platelet samples were collected for further analysis (model group), 6 rabbits were orally administered with pravastatin (10 rag/d) for additional 12 weeks (treated group), and the remaining 6 rabbits were left untreated until the end of the study (untreated group). The control, treated and untreated animals were then killed, and the aorta and platelet samples were collected for eNOS expression analysis (RT-PCR). Results The aorta samples in model and untreated group exhibited rough intima and a lot of longitudinal fatty streaks, which indicated that atherosclerosis models were established successfully. While in treated group, the degree of atherosclerosis was decreased. The average percent of thickness of fatty streaks or atheroselerotic plaques relative to the whole thickness of vessel walls was 0. 04±0. 02, 0. 82±0. 16, 0. 33±0. 18,0. 77±0. 14 in control, model, treated and untreated group, respectively. The thickness of fatty streaks or atherosclerotic plaques was significantly increased in the model and untreated groups and decreased in treated group compared with the control group (both P<0. 05). The expressions of platelet derived eNOS/mRNA were 1. 02± 0. 28, 0. 41± 0. 27, 1.00 ± 0. 77, 0. 40±0. 29 in control, model, treated and untreated group, respectively. The expression of eNOS/mRNA was markedly decreased in model group and untreated group compared with the control group, but was increased in treated group compared with untreated and model groups (F=3. 544, P = 0. 024). Conclusions There is a negative correlation between eNOS expression and atherosclerosis development, which suggests that the reversal effect of pravastatin on atheroselerosis progression and plaque formation may relate to the expression of platelet derived eNOS.     

家兔动脉粥样硬化与血小板源内皮型氧化氮合酶表达的相关性

Objective To explore the correlation of atheroselerosis progression and the expression of platelet derived endothelial nitric oxide synthase (eNOS) in rabbits. Methods A total of 24 male New Zealand white rabbits were used in this study. Six of the animals were fed with normal food (control group). Eighteen rabbits were fed with cholesterol-rich food (1 g/d) for 12 weeks to establish the atherosclerosis model. Among 18 models, 6 rabbits were executed immediately and their aorta and platelet samples were collected for further analysis (model group), 6 rabbits were orally administered with pravastatin (10 rag/d) for additional 12 weeks (treated group), and the remaining 6 rabbits were left untreated until the end of the study (untreated group). The control, treated and untreated animals were then killed, and the aorta and platelet samples were collected for eNOS expression analysis (RT-PCR). Results The aorta samples in model and untreated group exhibited rough intima and a lot of longitudinal fatty streaks, which indicated that atherosclerosis models were established successfully. While in treated group, the degree of atherosclerosis was decreased. The average percent of thickness of fatty streaks or atheroselerotic plaques relative to the whole thickness of vessel walls was 0. 04±0. 02, 0. 82±0. 16, 0. 33±0. 18,0. 77±0. 14 in control, model, treated and untreated group, respectively. The thickness of fatty streaks or atherosclerotic plaques was significantly increased in the model and untreated groups and decreased in treated group compared with the control group (both P<0. 05). The expressions of platelet derived eNOS/mRNA were 1. 02± 0. 28, 0. 41± 0. 27, 1.00 ± 0. 77, 0. 40±0. 29 in control, model, treated and untreated group, respectively. The expression of eNOS/mRNA was markedly decreased in model group and untreated group compared with the control group, but was increased in treated group compared with untreated and model groups (F=3. 544, P = 0. 024). Conclusions There is a negative correlation between eNOS expression and atherosclerosis development, which suggests that the reversal effect of pravastatin on atheroselerosis progression and plaque formation may relate to the expression of platelet derived eNOS.     

细胞调控因子SKP2的表达与HL-60/A耐药的关系

【目的】观察细胞周期调控因子SKP2、P27kip1在白血病耐药细胞株HL-60/A和非耐药细胞株HL-60细胞中的表达及细胞周期比例,探讨细胞增殖与耐药的关系。【方法】RT-PCR、Western blot检测SKP2、P27kip1、MRP mRNA及蛋白表达,流式细胞仪检测细胞周期,采用药物毒性分析方法检测细胞对化疗药物的敏感性。【结果】白血病耐药细胞株HL-60/A对阿霉素、柔红霉素、阿糖胞苷的耐药倍数分别为49.14倍、39.20倍和6.43倍;HL-60/A细胞MRP的表达高于HL-60;HL-60/A和HL-60细胞株G0/G1细胞期比例分别为（35.10&#177;0.81）%和（43.96&#177;1.12）%,两组比较P〈0.05;HL-60/A细胞中SKP2的表达高于HL-60细胞;P27kip1的表达低于HL-60细胞。【结论】HL-60/A细胞多药耐药机制产生与MRP的表达增高有关。耐药HL-60/A处于增殖期的细胞比例高,具有更高的增殖活性。     

在诊断学实习教学中强调人文教育

诊断学实习是医学生踏上进入临床的第一步.将人文素质教育思想贯穿于实习教学的体格检查、实验室检查、问诊等具体环节中,使学生在接受专业知识的同时,潜移默化地接受人文精神的培养,对提高学生的人文素质,树立高尚的医德理想会起到重要作用.     

mPGES-1抑制剂MK886对白血病HL-60细胞的增殖抑制作用

目的:观察膜结合型前列腺素E2合酶1(mPGES-1)抑制剂MK886对急性髓细胞白血病细胞株HL-60的增殖抑制作用。方法:不同浓度的MK886作用于HL-60细胞不同时间后,CCK-8测定其对HL-60细胞的增殖抑制率,流式细胞术检测HL-60细胞的凋亡情况,Western blot法检测mPGES-1、Bax、Bcl-2蛋白的表达,ELISA法检测PGE2。结果:HL-60细胞株高表达mPGES-1。MK886可时间、剂量依赖性地抑制HL-60细胞mPGES-1表达和PGE2合成,同时细胞增殖受到抑制,凋亡增加,Bax蛋白表达上调,Bcl-2表达下降。结论:MK886可抑制HL-60细胞增殖,诱导凋亡,其机制与下调mPGES-1表达、抑制PGE2合成和调控Bcl-2/Bax等有关。     

急性白血病合并弥散性血管内凝血41例

目的探讨急性白血病（AL）合并弥散性血管内凝血（DIC）的临床特点及诊治经验。方法回顾性分忻41例AL合并DIC患者的临床资料,包括：白血病分型、临床症状、DIC发生的时间、实验室检查的相关结果及疗效等。结果AL尤其是急性早幼粒细胞白血病合并DIC 90％发生在白血病治疗前,肝素治疗AL合并DIC总有效率为75．6％,低分子肝素与小剂量普通肝素的疗效相同。结论急性早幼粒细胞白血病合并DIC防治的重点是在初发期;出血尤其是颅内出血是AL合并DIC死亡的重要原因;积极治疗原发疾病,有效的抗凝治疗及补充凝血因子是治疗成功的关键。     

细胞调控因子SKP2的表达与 HL-60/A耐药的关系

 【目的】 观察细胞周期调控因子SKP2&#65380;P27kip1在白血病耐药细胞株HL-60/A和非耐药细胞株HL-60细胞中的表达及细胞周期比例,探讨细胞增殖与耐药的关系&#65377; 【方法】 RT-PCR&#65380;Western blot 检测SKP2&#65380;P27kip1&#65380;MRP mRNA及蛋白表达,流式细胞仪检测细胞周期,采用药物毒性分析方法检测细胞对化疗药物的敏感性&#65377; 【结果】 白血病耐药细胞株HL-60/A对阿霉素&#65380;柔红霉素&#65380;阿糖胞苷的耐药倍数分别为49.14倍&#65380;39.20倍和6.43倍;HL-60/A细胞MRP的表达高于HL-60; HL-60/A和HL-60细胞株G0/G1细胞期比例分别为(35.10 ± 0.81)%和(43.96 ± 1.12)%,两组比较P < 0.05;HL-60/A细胞中SKP2的表达高于HL-60细胞;P27kip1的表达低于HL-60细胞&#65377; 【结论】 HL-60/A细胞多药耐药机制产生与MRP的表达增高有关&#65377;耐药HL-60/A处于增殖期的细胞比例高,具有更高的增殖活性&#65377;     

环孢素联合雄激素辅以造血生长因子治疗再生障碍性贫血——附38例报告

目的：观察环孢素、雄激素及造血生长因子治疗再生障碍性贫血（再障）的临床疗效。方法：采用环孢素、雄激素及造血生长因子治疗38例再障患者,环孢素5mg（kg·d）,分2次口服,血象稳定可按患者具体情况逐渐减量,疗程不少于6个月;司坦唑醇6mg／d或十一酸睾酮120mg/d每日分3次口服,维持6个月以上;再根据患者外周血象,予红细胞生成素、粒细胞一巨噬细胞集落刺激因子或粒细胞集落刺激因子皮下注射。结果：38例再障患者总有效率58％,重型再障有效率40％,非重型再障有效率78％。结论：环孢素、雄激素及造血生长因子联合应用可作为再障尤其非重度再障的一个有效且经济的治疗方案。