地塞米松对重症胎粪吸入新生兔环氧化酶水平的影响

目的 观察地塞米松对重症胎粪吸入新生兔环氧化酶水平的影响.方法 将24只新生兔完全随机分为空白组、生理盐水组、地塞米松组,每组8只.空白组气管插管后不灌胎粪;后2组气管插管后注入胎粪混合物,地塞米松组在胎粪灌入后1和3 h静脉注射地塞米松,生理盐水组在同时间静脉注射等量生理盐水.3组均比例辅助通气模式机械通气,以维持正常潮气量、正常血氧饱和度及正常血气值,8 h后处死,取肺泡灌洗液,制备肺组织匀浆,用酶联免疫吸附法检测环氧化酶的含量.结果 3组间肺泡灌洗液和肺组织匀浆中环氧化酶I含量比较,差异均无统计学意义(均P＞0.05).空白组、生理盐水组、地塞米松组动物,肺泡灌洗液中环氧化酶2含量分别为(1.07±0.84)、(3.98±0.54)、(2.58±0.43)μg/L,肺组织匀浆中分别为(1.22±0.77)、(6.14±0.18)、(5.33±0.57)μg/L,3组间两两比较,差异亦均有统计学意义(均P＜0.05).结论 地塞米松可抑制环氧化酶2的表达,减轻胎粪吸入导致的肺部炎症反应.

Abstract：

Objective To observe the effect of dexamethasone on Cyclooxygenase in newborn rabbits with severe meconium aspiration syndrome. Methods Twenty four newborn rabbits were divided randomly into control group, saline group and dexamethasone group. Meconium solutions were injected into the endotracheal tube by 4 ml/kg in the two groups. Dexamethasone group intravenous injection of dexamethasone 0. 5 mg/kg at two doses 1h and 3h after meconium solutions instilled, Saline group received an equal volume of saline at the same points of time. All rabbits of three groups used proportional assist ventilation in order to maintain normal range of tidal volume (4-10mi/kg) and normal oxygen saturation (85% or more), The rabbits were killed at 8h after meconium instillation,lungs and trachea were excised. The Cyclooxygenase was tested by enzyme-link immunosorbent assay(ELISA) which in bronchoalveolar lavage fluid(BALF) and lung homogenate, and compared among three groups. Results Among the three groups, there was no statistically significant difference in bronchoalveolar lavage fluid and lung homogenate ( P ＞ 0. 05 ) levels of cyclooxygenase-1. Compared the levels of cyclooxygenase-2 in control group, saline group and dexamethasone group, in bronchoalveolar lavage fluid[( 1.07 ±0. 84) μg/L, (3.98 +0.54) μg/L, (2.58 +0.43)μg/L] the differences were significant ( P ＜ 0.05 ), in lung homogenate [( 1.22 ± 0. 77) μg/L, (6. 14 + 0. 18) μg/L,(5.33 + 0. 57) μg/L], the differences were significant ( P ＜ 0.05 ). Conclusion Dexamethasone inhibites the expression of COX-2, alleviates the lungs inflammation which is caused by meconium aspiration.     

甲状腺疾病患者血清可溶性细胞间黏附分子-1测定的临床意义

Objective To explore the contents and clinical significance of soluble intracellular adhesion molecule-1 ( sICAM-1 ) in patients with single goitre,Graves'and Hashimoto disease. Methods The contents of sICAM-1 in 100 cases of simple goiter group, Graves disease (GD) group 250 cases, Hashimot group 50 cases and 100 normal control were examined by sICAM-1 Radioimmunoassay(RIA) method,and the results were analyzed. Results There were no significant difference of sICAM-1 contents between ( 170.43 ± 34. 23 ) μg/L in normal control group and ( 182.48 ± 40.05) μg/L in simple goiter group( t = 1. 104, P ＞ 0. 05 ); The contents of slCAM-1 in GD group and HT group [( 279.93 ± 86.69) μg/L、 (250.36 ± 81.56) μg/L] were higher than the control group( t = 2.310,2. 210, all P ＜0. 05) ;The sICAM-1 contents in 3 species.methods after treatment [( 178.95 ±59.78) μg/L, ( 185.65 ±53.25)μg/L, (259.41 ± 71.46) μg/L)] were significantly lower than before treatment [(316.53 ± 66.13) μg/L, (277.79±64.30)μg/L,(285.71 ±72.14)μg/L](t=2.312,2.278,2.328,all P ＜0.05);After the Graves'patients were treated and their thyroid function were normal,their serum sICAM-1 levels( 251.92 ± 77.75 )μg/L were lower than that( 329.34 ± 90.47 ) μg/L in relapse Graves'group( t= 2.412 ,P ＜ 0. 05). Conclusion sICAM-1 RIA can be used as a parameter in diagnosing autoimmune thyroid diseases and in evaluating effects of therapy,stopping medicine or the relapse of Graves' disease.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

危重症患者血清降钙素原测定对细菌感染的诊断价值

Objective To evaluate the clinical value of serum procalcitonin (PCT) in the diagnosis of bacte-rial infections in the critically ill patients. Methods A loud d 100 cases of critical patients were divided into bacteri-al infection group(56 cases) and non-bacterial infection group(44 cases). Serum PCT was measured by immunolu-minometric assay. Results The concentration of PCT in bacterial infection group(21.54 ±5.72) μg/L, was signifi-cantly higher than non-bacterial infection group (11. 95±4. 58)μg/L (t =2.291,P<0.05);The APACHE Ⅲ score of bacterial infection group(62. 44 ± 19. 55) cent was significantly higher than non-bacterial infection group(44. 56 ± 25. 88) cent(t = 2. 195 ,P < 0. 05). The concentration of PCT of 1.0μg/L and 2. 0 p.g/L compared to the former sensitivity (96. 5) % higher than the latter (55.2) % (X2 = 3. 94, P < 0. 05), the former specificity (41.7) % lower than the latter (95.8)% (X2 = 4. 02 ,P < 0. 05);1.5μg/L as a positive standard Youden index and the Agreement (83.0 % ,0. 65), were significantly higher than 1 μg/L and 2 μg/L(71.7%, 0. 38 ;73.6% ,0. 51) (X2 = 3.84, X2=3. 90,X2 = 3.992 = 3.91 ,P < 0. 05);The concentration of PCT in death group (38. 9 ±12. 6)μg/L was signifi-canfly higher than the survival group(11.8± 8. 3) μg/L(t =2. 398 ,P <0. 05). Conclusion Serum PCT has clinical values in the diagnosis and therapy of bacterial infections in the critical patients.     

大黄酸对体外大鼠皮质神经元突起长度及微管相关蛋白2mRNA表达的影响

目的研究大黄酸(RH)对大鼠皮质神经元的营养作用,并初步探讨其相关机制。方法体外DMEM/F12+0.4%B27培养新生大鼠皮质神经元,应用神经元特异性烯醇化酶(NSE)和微管相关蛋白2(MAP2)免疫细胞化学染色法鉴定神经元。神经元细胞加入RH 2,4和8μmol·L-1作用72 h,计算神经元平均突起长度;或分别同时加入Trk受体拮抗剂K252a 50 nmol·L-1和PI3K抑制剂LY294002 10μmol·L-1测量神经元平均突起长度。MTT法检测细胞存活,并测定培养液中乳酸脱氢酶(LDH)的含量。逆转录-聚合酶链反应(RT-PCR)半定量检测MAP2 mRNA表达。结果 NSE及MAP2免疫荧光染色结果显示,绝大多数细胞呈阳性反应,所培养的细胞90%以上为神经元。MTT和LDH检测结果表明,与溶媒对照组相比,RH2,4和8μmol·L-1能明显提高神经元存活率(P<0.01);平均突起长度明显增加(P<0.01)。与RH8μmol·L-1组相比,同时加入K252a 50 nmol·L-1或LY294002 10μmol·L-1,平均突起长度明显缩短(P<0.01)。与溶媒对照组相比,RH 2,4和8μmol·L-1组MAP2 mRNA表达量明显增加(P<0.01)。结论 RH对新生大鼠皮质神经元具有神经营养作用,能促进神经元突起的生长和提高神经元的存活率。RH神经营养作用可能部分通过激活Trk受体,继而激活Ras/PI3K/PKB通路而发挥的。     

氯胺酮诱导大鼠海马神经元凋亡及机制

目的 研究氯胺酮对SD大鼠海马神经元的凋亡诱导作用,并探究其作用机制.方法 培养SD大鼠海马神经元细胞,将对数生长期的大鼠海马神经元分为对照组(不加氯胺酮)和实验组(加氯胺酮且其终浓度分别为10、20 μmol/L).24h后,缩胆囊素8肽(CCK-8)法检测细胞存活率,流式细胞术检测细胞凋亡,蛋白质印迹法检测蛋白phospho-细胞外信号调节蛋白激酶(P-ERK)、Bax、Bcl-2的表达.结果 10、20 μmol/L实验组神经元的存活率分别为(73.7±1.5)％和(58.2±2.4)％,明显低于对照组的(97.2±1.8)％(P＜0.05);凋亡率分别为(24.5±7.4)％和(34.7±4.9)％,明显高于对照组的(4.7±2.3)％(P＜0.05);P-ERK、Bax表达量增加,Bcl-2表达量减少.结论 氯胺酮能够诱导大鼠海马神经元凋亡,可能是通过激活P-ERK、改变Bax/Bcl-2比值实现的.     

NSE与S100β蛋白在急性颅脑损伤诊断和预后中的意义

目的探讨神经元特异性烯醇化酶(NSE)与S100β蛋白在急性颅脑损伤诊断和预后中的意义。方法 90例由头颅CT证实为急性颅脑损伤患者,根据患者在入院时的格拉斯哥昏迷量表(GCS)将其分成轻型损伤组(34例, GCS评分13~15分)、中型损伤组(32例, GCS评分9~12分)和重型损伤组(24例, GCS评分3~8分)。所有患者进行NSE和S100β电化学免疫试剂测定。比较三组患者发病24 h的血清NSE浓度和S100β蛋白表达水平以及预后不良与预后良好患者伤后不同时间的血清NSE浓度和S100β蛋白表达水平。结果重型损伤组患者发病24 h血清NSE浓度(27.81±6.61)μg/L和S100β蛋白表达水平(1.46±0.51)μg/L均高于中型损伤组的(9.25±3.22)、(0.85±0.32)μg/L和轻型损伤组的(7.53±1.17)、(0.44±0.25)μg/L,且中型损伤组患者发病24 h血清NSE浓度和S100β蛋白表达水平高于轻型损伤组,差异均具有统计学意义(P<0.05)。预后良好组24 h、72 h、7 d血清NSE浓度分别为(13.91±8.59)、(9.20±7.43)、(5.64±3.30)μg/L,均低于预后不良组的(30.36±19.67)、(20.25±11.32)、(14.36±8.31)μg/L,预后良好组24 h、72 h、7 d的S100β蛋白表达水平分别为(0.70±0.39)、(0.51±0.20)、(0.41±0.11)μg/L,均低于预后不良组的(1.99±0.71)、(1.55±0.52)、(1.24±0.41)μg/L;所有患者72 h、7 d的血清NSE浓度和S100β蛋白表达水平均低于24 h,且7 d的血清NSE浓度和S100β蛋白表达水平低于72 h,差异均具有统计学意义(P<0.05)。结论血清NSE浓度和S100β蛋白表达水平可以作为临床辅助诊断急性颅脑损伤程度、损伤分型及预后判断的重要指标,联合检测二者的含量对急性颅脑损伤的诊断及预后评估有重要的临床价值,值得作进一步的推广。     

体外循环不阻断升主动脉低温心室颤动左心室引流技术对心肌保护作用的实验研究

目的 检测内皮素、NO、丙二醛和超氧化物歧化酶(SOD)血液学指标及心肌组织局部内皮素受体A( ETA) mRNA的表达,评价体外循环不阻断升主动脉低温心室颤动左心室引流技术对心肌的保护作用,探讨更好的心肌保护方式。方法 建立体外循环动物模型,实验动物分为对照组（停跳组）及实验组（心室颤动组）,体外循环前、体外循环1h、体外循环2h、体外循环结束后1h4个时间点分别抽取静脉血,同时于各时间点分别钻取左心室壁局部心肌组织100 mg。测定血浆内皮素、NO、丙二醛和SOD水平。用逆转录聚合酶链反应方法检测心肌ETA mRNA的表达。结果 随体外循环时间延长,2组内皮素、丙二醛水平均有升高。于体外循环2h和体外循环结束后1h两个时间点,对照组内皮素、丙二醛水平明显高于实验组[(70.27±7.03)ng/L比(56.53±12.11)rig/L,(106.36±6.61)ng/L比(72.71±12.72) rig/L; (4.71±1.31) μmol/L 比(3.32±0.82) μmol/L,(8.27±1.99) μmol/L比(4.38±1.02) μmol/L,均P＜0.01];2组NO、SOD平均呈下降趋势,但实验组下降和缓,在后两个时间点,对照组NO、SOD水平明显低于实验组[(28.57±9.20)μmoVL比(45.36±16.59)μmol/L,(12.14±7.03)μmol/L比(47.50±17.18) μmol/L; (7.23±2.59) μg/L比( 17.69±7.96) μg/L,(2.78±0.88) μg/L比(18.52±10.30) μg/L,P＜0.05或P＜0.01];2组ETA mRNA的表达水平均有升高,对照组升高幅度比实验组要高,体外循环1h、2h和体外循环结束后1h差异明显[(0.35±0.01)比(0.28±0.05),(0.49±0.05)比(0.31±0.04),(0.67±0.05)比(0.38±0.07),P＜0.01]。结论 体外循环不阻断升主动脉低温心室颤动左心室引流技术对心肌具有良好保护作用。     

肿瘤标记物联合检测在肺癌诊断中的价值

目的探讨癌胚抗原（CEA）、血清神经元特异性烯醇化酶（NSE）、细胞角蛋白19片段（CYFRA21—1）在肺癌中的临床诊断价值。方法采用电化学发光免疫分析技术测定85例肺癌患者（肺癌组）、36例肺良性疾病患者（良性病变组）血清中的CEA、CYFRA21—1和NSE水平。结果NSE、CEA、CYFRA21-1在肺腺癌患者血清中的浓度分别为（8．80±1．53）μg／L、（83．30±3．52）μg／L、（5．90±0．58）μg/L,在鳞癌中分别为（8．60±1．47）μg／L、（14．30±3．25）μg／L、（8．30±1．03）μg/L,在小细胞未分化癌中分别为（33．80±4．24）μg/L、（13．60±1.95）μg/L、（34．80±5．64）μg／L均高于良性病变组的（7．80±1．58）μg/L、（7．90±1．12）μg/L、（1．86±1．53）μg／L,差异有统计学意义（均P〈0．01）。CYFRA21-1在鳞癌的敏感度最高（72．2％）;NSE在小细胞未分化癌敏感度最高（63．6％）;CEA在腺癌中的敏感度最高（69．8％）。3项指标联合检测肺癌的敏感度为72．9％。特异度为91．4％。结论血清CYFRA21—1、CEA和NSE的联合检测有助于临床对肺癌的诊断,并对组织分型有较高的参考价值。     

庆大霉素局部注射和肌内注射治疗慢性细菌性前列腺炎的疗效对比

目的 比较局部注射和肌内注射庆大霉素治疗慢性细菌性前列腺炎的临床疗效.方法 将24例慢性细菌性前列腺炎患者按就诊先后顺序随机分为A组和B组.A组12例患者为前列腺内直接注射给药,庆大霉素80 mg,1次/2 d;B组12例患者为肌内注射给药,庆大霉素80 mg,1次/d.A组患者给药3次后,B组患者给药6次后,应用放射免疫分析法测定前列腺液和血清中庆大霉素浓度,同时测定前列腺液pH值.结果 A组患者治疗总有效率100.0％ (12/12),B组总有效率33.3％ (4/12),差异有统计学意义(P＜0.05).给药后1、4、24h和1周后,A组患者前列腺液庆大霉素浓度均比血清中高,差异均有统计学意义[1 h:(14 833±10 684) μg/L比(3267±1105) μg/L;4 h:(11 208 ±5675) μg/L比(1257±335) μg/L;24 h:(1554±696)μg/L比(272±97) μg/L;1周:(487±127) μg/L比(0±0) μg/L,均P＜0.01];B组患者前列腺液庆大霉素浓度均比血清中低,差异均有统计学意义[1 h:(217±213) μg/L比(2643±811) μg/L;4 h:( 700±244) μg/L比(1170±256) μg/L;24h:(206±118) μg/L比(766±234) μg/L;1周:(39±7) μg/L比(23±9) μg/L,均P＜0.01];A组患者前列腺液中庆大霉素浓度与B组患者比较,差异均有统计学意义(均P＜0.01).治疗前后,A组患者前列腺液pH值差异有统计学意义[(8.3±2.2)比(6.3±1.8),P＜0.05];B组患者前列腺液pH值差异无统计学意义[(8.3±2.4)比(8.1±2.1),P＞0.05].结论 局部注射庆大霉素治疗慢性细菌性前列腺炎较肌内注射疗效更好.     

血清中NSE及S100B蛋白检测对预测高胆红素血症早产儿胆红素脑损伤的临床意义

目的探索高胆红素血症早产儿血清中神经元特异性烯醇化酶（NSE）及星形胶质源蛋白（S100B）的测定对预测早产儿发生胆红素脑损伤的临床意义。方法选择日龄2~7 d内患高胆红素血症的早产儿112例作为观察组,另选择36例无胆红素血症的早产儿作为对照组,重氮法检测血清总胆红素（TBiL）,酶联免疫吸附法检测NSE及S100B蛋白。对部分患儿进行脑干听觉诱发电位（BAEP）检测,受试者工作曲线（ROC）分析患儿NSE、S100B蛋白、TBiL等检测方法与BAEP检测的相关性。结果观察组NSE、S100B蛋白及TBiL分别为（109.35±33.63）、（3.350±1.677）μg/L及（163.20±77.17）μmol/L,与对照组的（66.28±21.50）、（1.876±0.744）μg/L及（75.84±36.36）μmol/L比较,差异有统计学意义（P〈0.01）,且观察组NSE、S100B蛋白与TBiL之间呈正相关性。BAEP异常组与BAEP正常组TBiL分别为（299.90±88.30）μmol/L与（303.20±61.20）μmol/L,差异无统计学意义（P〉0.05）;BAEP异常组NSE、S100B蛋白分别为（144.33±33.06）、（4.259±1.195）μg/L,与BAEP正常组的（86.86±25.02）、（3.097±1.557）μg/L比较,差异有统计学意义（P〈0.01）。对患有高胆红素血症的早产儿根据TBiL水平判断BEAP的异常差异无统计学意义（P=0.727）;利用NSE、S100B蛋白预测患胆红素血症早产儿听力损害的临界点分别为110.56、3.606μg/L,NSE、S100B蛋白、TBiL预测高胆红素血症早产儿听力损害的灵敏度分别为91.00%、88.67%、53.47%,特异度分别为78.46%、70.13%、42.88%,NSE检测的灵敏度和特异度略优于S100B蛋白,两者的灵敏度与特异度均显著高于TBiL（P=0.003）。结论对患高胆红素血症的早产儿测定血清中NSE及S100B蛋白的含量对诊断早产儿胆红素脑损伤有重要价值,可作为临床上判断胆红素脑损伤的敏感指标。     

吡格列酮对脂多糖引起大鼠大脑皮质神经元损伤的抑制作用

目的探讨吡格列酮对脂多糖(LPS)引起的神经元损伤的抑制作用,并探讨其信号传导机制。方法取培养7d的大鼠大脑皮质神经元细胞,除正常对照组外,其余各组先给予相应的处理30min～1h后,再加LPS10mg.L-1处理4～24h。MTT法测定细胞存活率;Hoechst33258核染色观察细胞凋亡的形态学改变;免疫荧光染色法测定磷酸化c-Jun氨基端激酶1(JNK1)细胞内定位;Western蛋白印迹法检测活性胱天蛋白酶3(caspase3)蛋白表达和磷酸化JNK1水平;Griess法测定细胞培养上清液中一氧化氮(NO)含量。结果与对照组相比,LPS可使体外培养神经元细胞存活率明显下降,(100.0±10.9)%vs(72.3±2.1)%;凋亡细胞百分率明显增加,(11.5±4.2)%vs(39.5±8.2)%;活性caspase3蛋白表达和磷酸化JNK1水平增加;细胞培养上清液中NO含量明显增加。吡格列酮0.01,0.1和1μmo.lL-1可明显对抗LPS引起的培养神经元细胞存活率下降,并呈一定浓度依赖性。吡格列酮0.1和1μmol.L-1也可明显对抗LPS引起的培养神经元凋亡细胞百分率、活性caspase3蛋白表达、磷酸化JNK1水平和NO含量增加。LPS+吡格列酮(1μmo.lL-1)组,细胞存活率为(97.8±9.7)%,凋亡细胞百分率为(20.6±5.0)%,NO含量为(6.8±1.3)μmol.L-1。过氧化物酶体增殖物激活受体γ(PPARγ)的特异性阻断剂GW9662不能去除吡格列酮对LPS引起的神经元细胞损伤的抑制作用,在LPS+吡格列酮(1μmol.L-1)+GW9662(10μmo.lL-1)组,细胞存活率为(90.7±6.9)%,凋亡细胞百分率为(23.4±4.1)%,NO含量为(5.8±0.7)μmol.L-1。GW966210μmol.L-1对LPS引起的细胞存活率降低没有影响。与LPS组相比,JNK特异性阻断剂SP6001255μmol.L-1可明显对抗LPS引起的神经元损伤,细胞存活率明显增加,(72.3±2.1)%vs(109.8±11.8)%;凋亡细胞百分率降低,(39.5±8.2)%vs(19.1±4.8)%;NO含量降低,(21.1±5.0)μmol.L-1vs(4.0±1.3)μmol.L-1。结论吡格列酮能明显抑制LPS引起的皮质神经元损伤,这种作用可能与抑制JNK信号传导通路有关,与PPARγ激活无关。     

白藜芦醇拮抗游离脂肪酸诱导的胰岛B细胞凋亡机制探讨

目的探讨白藜芦醇拮抗游离脂肪酸诱导的体外培养的胰岛B细胞凋亡的可能机制。方法将10μmol/L白藜芦醇和500μmol/L棕榈酸同时作用于体外培养的胰岛B细胞。共分为3组:空白组(不含棕榈酸)、棕榈酸组(PA组,含500μmol/L棕榈酸的脂性培养基)、白藜芦醇组(Res组,含10μmol/L白藜芦醇+500μmol/L棕榈酸)。以流式细胞术检测细胞凋亡,RT-PCR检测凋亡相关蛋白Bax和Bcl-2 mRNA水平。结果与PA组相比,Res能显著降低B细胞凋亡率(95.82%±1.94%vs.11.03%±1.08%,P<0.01),降低Bax mRNA(0.185±0.005 vs.0.161±0.003,P<0.01),升高Bcl-2 mRNA(0.004±0.001 vs.0.008±0.001,P<0.01)。结论白藜芦醇能拮抗棕榈酸诱导的胰岛B细胞凋亡,其机制可能与调节凋亡相关蛋白有关。     

缺氧缺血性脑病新生儿血清神经元特异性烯醇化酶浓度动态变化的意义

目的探讨新生儿窒息后缺氧缺血性脑病（HIE）患儿血清神经元特异性烯醇化酶（NSE）的动态变化及意义。方法收集2005年1月～2012年12月住院治疗的足月窒息新生儿75例（窒息组）和健康足月新生儿50例（对照组）,采用酶联免疫吸附试验法检测两组新生儿出生后1、3、7d时血清NSE浓度变化,并分析其变化与窒息后HIE的关系。结果出生后1、3、7d,窒息组新生儿血清NSE浓度均明显高于对照组[（44．50±12．08）μg/L vs（15．59±6．25）μg/L,（42．65±12．43）μg／L vs（15．38±5．84）μg/L,（37．90±9．50）μg／Lvs（13．92±5．37）μg／L],差异有统计学意义（P〈0．05）。重度窒息新生儿血清NSE浓度明显高于轻度窒息新生儿[（58．95±14．85）μg／Lvs（29．15±9．32）μg/L,（62．95±19．13）μg/Lvs（22．35±5．75）μg/L（57．35±13．75）μg／Lvs（18．45±5．25）μg／L],差异有统计学意义（P〈0．05）。出生后1、3、7d,HIE新生儿19例血清NSE浓度逐渐升高,而MRI正常新生儿56例血清NSE浓度逐渐下降,HIE新生儿血清NSE浓度均明显高于MRI正常新生儿[（59．84±15．09）μg／Lvs（32．95±12．86）μg／L,（63．95±19．21）μg/L vs（25．73±6．75）μg／L,（68．25±19．79）μg／Lvs（19．62±5．94）μg/L,差异有统计学意义（P〈0．05）。结论监测血清NSE浓度动态变化有助于早期辅助判断窒息新生儿HIE。