血浆SIOOB蛋白在缺氧缺血性脑病新生儿的诊断评估

目的探讨血浆S100B蛋白对缺氧缺血性脑病（hypoxic ischemic encephalopathy，HIE）新生儿脑损伤的临床意义。方法选择54例临床诊断为HIE的新生儿在出生12h时抽血检测S100B、神经元特异性烯醇化酶（neuron specifice Dolase，NSE）及脑型肌酸激酶同功酶（creatine kinaes BB isozyme，CK-BB），与47例非HIE的窒息新生儿和22例健康新生儿进行对照比较。评价敏感性和特异性，绘制ROC曲线，计算ROC曲线下面积。结果出生12h时HIE患儿血浆S100B、NSE和CK-BB阳性率显著高于窒息组和对照组（均P〈0．01），S100B对HIE的敏感性为88．89％，特异性为82．61％，之和高于NSE及CK-BB。S100B的ROC曲线下面积最大（面积：0．950；95％可信区间0．918—0．983），临床诊断效能高于NSE及CK-BB。结论HIE患儿出生12h时血浆S100B、NSE和CK-BB均能预示HIE患儿的脑部损伤，S100B阳性率最高．三指标联合检测．有助于HIE的早期诊断和病情判断。     

Single nucleotide polymorphisms in the myostatin (MSTN) and muscle creatine kinase (CKM) genes are not associated with elite endurance performance

Maximal oxygen uptake (VO_2max) is one of the most important determinants of elite endurance performance. VO_2max is determined by a whole range of genetic and environmental factors. Single nucleotide polymorphisms (SNPs) in muscle myostatin (MSTN) and creatine kinase (CKM) genes are candidates for VO_2max and skeletal muscle performance phenotypes. Common MSTN (rs3791783, rs11681628 and rs7570532) and CKM (rs344816, rs10410448, rs432979, rs1133190, rs7260359, rs7260463 and rs4884) SNPs, selected from HapMap CEU data in order to tag the genetic variability of the proteins, were genotyped in 316 male Caucasian elite endurance athletes and 304 sedentary controls from the Genathlete study. Association with elite endurance performance was determined by logistic regression analysis. The P‐value for statistical significance was set at <0.01. None of the SNPs or haplotypes showed a significant association with elite endurance status. We conclude that common variants of MSTN and CKM genes do not play a role in attaining high‐level endurance performance in Caucasian populations.     

精神分裂症兴奋行为与血清肌酸激酶活性研究

目的:研究精神分裂症患者兴奋行为与血清肌酸激酶(CK)活性的关系。方法:将126例精神分裂症患者,以阳性症状与阴性症状量表(PANSS)中有关兴奋行为条目评分,分为实验组(67例)和对照组(59例),于治疗前及治疗第2、4、6周末分别进行评估,同时抽取患者空腹静脉血样,测定CK活性。结果:治疗前实验组血清肌酸激酶(CK)活性较对照组为高,差异有显著性。治疗第6周末,两组PANSS有关兴奋行为条目评分及CK活性差异无显著性。结论:对于精神分裂症患者兴奋行为,血清肌酸激酶(CK)活性有可能成为其生物学标志之一。     

爱维治对烧伤患者心肌组织缺血缺氧的保护作用

目的:研究爱维治对烧伤患者心肌组织缺血缺氧的影响。方法:本研究为随机、开放、对照性多中心研究。选择烧伤总面积在30%~70%总体表面积(TBSA)且血清乳酸值异常的患者作为研究对象,将70例患者随机分为两组:试验组(n=36)给予爱维治30 mL 生理氯化钠溶液250 mL,静脉滴注,qd,给药7 d;对照组(n=34)仅给予生理氯化钠溶液250 mL,静脉滴注,qd,共7 d。取患者用药前、用药后48 h,72 h和7 d的血样,以血清乳酸值、心肌型肌酸激酶同工酶和肌钙蛋白作为主要监测指标,评价爱维治对烧伤后患者心肌组织的影响。结果:两组血清乳酸值、心肌型肌酸激酶同工酶、肌钙蛋白阳性率在观测期内均有下降,但试验组下降的时间早且幅度大,有统计学意义。结论:爱维治能够有效而且快速改善大面积烧伤患者心肌组织缺血缺氧状况。     

Toxicologic evaluation of modified gum acacia: mutagenicity, acute and subchronic toxicity.

Modified gum acacia, produced from acacia gum by a process analogous to the production of modified food starch, was tested for mutagenicity in the microbial reverse mutation assay. The assay employed a wide range of dose levels, both with and without metabolic activation. Test results gave no indication that modified gum acacia possessed any mutagenic potential. The acute oral toxicity of modified gum acacia was determined in two studies employing Sprague-Dawley rats, and the LD50 values were found to be >2000 mg/kg. The primary dermal irritation potential of modified gum acacia was evaluated in rabbits by the Draize method. Test results indicated that modified gum acacia was slightly irritating by the Environmental Protection Agency (EPA) classification but not a primary irritant by Consumer Product Safety Commission (CPSC) guidelines. The subchronic toxicity of modified gum acacia was examined in Sprague-Dawley rats fed diets containing 0%, 1%, 2.5%, and 5% modified gum acacia for 13 weeks. No dose-related effects on survival, growth, hematology, blood chemistry, organ weights, or pathologic lesions were observed. Results of these studies indicate that modified gum acacia does not possess mutagenic potential and that animals are not adversely affected by acute or subchronic exposure to modified gum acacia.     

脑型肌酸激酶同工酶测定在非心源性疾病的应用

目的 探讨脑型肌酸激酶同工酶(CK-BB)在肿瘤、自身免疫性疾病的筛查以及器官损伤定位中的意义. 方法 免疫抑制法检测血清标本心肌型肌酸激酶同工酶(CK-MB)、肌酸激酶(CK)活性,计算二者比值.随机选取CK-MB/CK＞50%的非心源性疾病的血清标本90份及30份对照血清,用CK同工酶琼脂糖凝胶电泳进行分离、鉴定. 结果 血清CK-MB假性增高的标本多见于肿瘤、自身免疫病,经电泳分离及可见光扫描后,肿瘤和自身免疫性疾病组的CK-BB含量明显高于对照组,差别具有统计学意义(P＜0.01),血清CK-BB增高情况与其在组织器官中的分布相符. 结论 血清CK-BB的检测在肿瘤、自身免疫性疾病的辅助诊断以及器官损伤定位中具有重要意义.     

食管癌三野根治术围术期心肌损伤标志物的变化

目的 了解行三野根治术的食管癌患者围术期心肌损伤标志物的动态变化,评估其监测围术期心肌损伤的价值. 方法 对96例术前心肌损伤标志物正常的食管癌患者,于术前、术毕、术后1～3 d采集静脉血,分别进行谷草转氨酶(AST)、肌酸激酶(CK)、乳酸脱氢酶(LDH)、肌酸激酶MB同工酶(CK-MB)、心肌肌钙蛋白I(cTnI)等心肌损伤标志物的测定,并对检测结果进行统计分析. 结果 7例围术期≥1次血清cTnI水平超过参考值范围,其中4例被确诊为心肌损伤.余89例均未发现心肌损伤,但术后1 d血清AST、LDH、CK及CK-MB均高于术前. 结论 食管癌患者围术期心肌损伤的生化监测首选心肌肌钙蛋白.     

保元大黄汤治疗慢性肾功能衰竭的临床研究

用保元大黄汤（治疗组）治疗慢性肾功能衰竭３６例，与包醛氧化淀粉为主的西药综合治疗（对照组）２０例比较，两组血ＢＵＮ、Ｃｒ均有降低。但治疗组Ｈｂ明显提高，疲劳乏力、腰膝酸软、纳差、性功能障碍和精神抑郁症状显著改善（Ｐ＜０．０１），雌二醇、孕酮、睾酮、肌酸磷酸激酶（ＣＰＫ）比治疗前有明显调整（Ｐ＜０．０１）。对照组症状改善不明显，血红蛋白、性激素水平和ＣＰＫ治疗前后变化不大。认为保元大黄汤能改善慢性肾     

愈心痛胶囊对急性心肌缺血犬血浆内皮素和血清一氧化氮的影响

本研究观察了中药复方愈心痛胶囊消化道给药对实验性急性心肌缺血犬血浆内皮素（ＥＴ）和血清一氧化氮（ＮＯ）水平及肌酸磷酸激酶（ＣＰＫ）活性的影响。结果显示：在犬急性心肌缺血过程中血清ＣＰＫ活性和血浆ＥＴ水平均显著增高，血清ＮＯ水平下降。愈心痛胶囊两个剂量组均可明显抑制实验性犬心肌损伤时ＣＰＫ的溢出和血浆ＥＴ的过量释放，同时促进ＮＯ的生成和释放，与盐水对照组比较差异显著（Ｐ＜０．０５～０．００１），从而保护心肌免受缺血性损伤，其作用效果与剂量呈正相关。     

大明胶囊对大鼠心肌梗死预防性保护作用的研究

目的观察大明胶囊对大鼠心肌梗死的预防性保护作用。方法对大鼠预防性给予大明胶囊1wk后,结扎其左冠脉前降支造成心肌梗死。通过测量心肌梗死面积,观察心肌酶学指标、病理形态学和组织超微结构的改变,评价大明胶囊对心肌梗死的预防性保护作用。结果心梗染色面积和心肌酶学指标显示(与模型组相比),大明胶囊灌胃后心肌梗死面积减少(P<0.05),乳酸脱氢酶(LDH)和肌酸激酶(CK)的含量降低(P<0.05)。心肌形态学和超微结构显示,大明胶囊减轻了左冠脉前降支结扎所造成的心肌损伤。结论通过心梗面积、心肌酶学指标、形态学和超微结构的观察,大明胶囊能预防性保护心肌梗死所造成的损伤。这提示大明胶囊可能应用于心肌梗死治疗。