脑钠肽结合超声多普勒评价舒张性心力衰竭患者的心功能

目的 采用血浆脑钠肽(BNP)浓度测定结合超声多普勒心动图的参数来评价舒张性心力衰竭患者的心功能,为临床提供判断舒张性心力衰竭及其严重程度的敏感和特异的客观指标.方法 选择舒张性心力衰竭患者85例(心力衰竭组),按纽约心脏病学会(NYHA)心功能分级,Ⅱ级31例、Ⅲ级36例、Ⅳ级18例,以及健康对照组30例.测定血浆BNP浓度,超声多普勒结合组织多普勒显像(TDI)测定左室结构、左室舒张功能及左室舒张末压.结果 舒张性心力衰竭患者血浆BNP浓度明显高于对照组(P<0.001),且随心力衰竭程度加重而逐渐升高(P<0.001).舒张性心力衰竭组左房内径(LA)、室间隔厚度(IVS)、左室后壁厚度(LVPW)、舒张早期流速峰值/舒张早期速度峰值(E/Em)较对照组升高,E/舒张晚期流速峰值(A)降低(P<0.01),血浆BNP浓度与E/A比值呈负相关(r=-0.634,P<0.01),与E/Em比值呈正相关(r=0.728,P<0.01).结论 血浆BNP浓度测定结合超声多普勒心动图的参数判断舒张性心力衰竭患者的心功能简便准确.     

利用噬菌体展示技术筛选日本血吸虫模拟抗原表位

目的　从噬菌体肽库筛选日本血吸虫抗原模拟抗原表位。方法　制备亲和纯化的日本血吸虫病人血清抗体 Ig G,用此 Ig G包被酶标板对 12肽库进行反复淘选 ,对获得的目的噬菌体进行鉴定及免疫原性分析。结果　获得一批阳性噬菌体克隆 ,其中一部分与血吸虫病人血清反应产生较高的吸光值 ,Western blotting分析表明这些噬菌体能被血吸虫病人血清所识别 ,具有类似于血吸虫抗原的免疫原性。结论　获得一批具有模拟日本血吸虫抗原表位的噬菌体克隆 ,为今后进一步研究它们在血吸虫病诊断及疫苗研究中的作用奠定了基础。     

慢性心力衰竭患者氨基末端B型钠尿肽与心肌肌钙蛋白Ⅰ水平分析

目的了解氨基末端B型钠尿肽（NT-proBNP）在慢性心力衰竭（CHF）患者中的水平变化以及与心肌肌钙蛋白I（cTnI）之间的关系。方法将166例CHF患者心功能按美国纽约心脏病协会（NYHA）分级方案分为Ⅰ～Ⅳ级（Ⅰ级15例、Ⅱ级57例、Ⅲ级54例、Ⅳ级40例）,同时测定166例CHF患者和45名正常对照者血清cTnI及NT-proBNP水平并作比较,分析NT-proBNP与cTnI及患者年龄之间的相关关系。结果 CHF组以及NYHA分级各组患者的血清NT-proBNP、cTnI水平均高于正常对照组（P〈0.01）;且随着NYHA分级的提升,NT-proBNP、cTnI水平也随之增高（P〈0.01）,超过正常参考范围的例数也随之增多。CHF组NT-proBNP与cTnI、年龄呈正相关（r分别为0.664、0.217,P均〈0.01）。结论 NT-proBNP是诊断CHF较好的心肌标志物,能反映CHF病情的严重程度。cTnI有随着NT-proBNP升高而增高的趋势。     

血清抗环瓜氨酸肽抗体检测在类风湿关节炎诊断中的价值

目的探讨血清中抗环瓜氨酸肽(抗CCP)抗体和类风湿因子(RF)联合检测在类风湿关节炎(RA)诊断中的意义。方法应用酶联免疫吸附试验和散射比浊法对52例RA患者、35例非RA相关疾病患者和30例健康体检者血清中抗CCP抗体和RF水平进行检测。结果抗CCP抗体和RF在RA患者中的阳性率分别为65.4%和88.5%,明显高于疾病对照组(5.7%和22.9%)和健康对照组(0)(P<0.01),抗CCP抗体和RF联合检测的特异性达98.5%,抗CCP抗体和RF浓度无相关性(P>0.05)。结论抗CCP抗体和RF联合检测可显著提高对RA的诊断特异性,对RA的诊断和治疗有重要意义。     

Serotonin increases the functional activity of capsaicin-sensitive rat trigeminal nociceptors via peripheral serotonin receptors

Peripheral serotonin (5HT) has been implicated in migraine and temporomandibular pain disorders in humans and animal models and yet the mechanism(s) by which 5HT evokes pain remains unclear. Trigeminal pain can be triggered by activation of the transient receptor potential V1 channel (TRPV1), expressed by a subset of nociceptive trigeminal ganglia (TG) neurons and gated by capsaicin, noxious heat, and other noxious stimuli. As 5HT is released in the periphery during inflammation and evokes thermal hyperalgesia, and TRPV1 is essential for thermal hyperalgesia, we hypothesized that 5HT increases the activity of capsaicin-sensitive trigeminal neurons and that this increase can be attenuated by pharmacologically targeting peripheral 5HT receptors. TG cultures were pretreated with 5HT (10 nM-100 μM), sumatriptan (5HT_1B/1D agonist), ketanserin (5HT_2A antagonist), granisetron (5HT₃ antagonist), or vehicle prior to capsaicin (30-50 nM). Single-cell accumulation of intracellular calcium was recorded or calcitonin gene-related peptide (CGRP) release was measured following each treatment. In addition, using in situ hybridization and immunohistochemistry, we detected the colocalization of 5HT_1B, 5HT_1D, 5HT_2A, and 5HT_3A, but not 5HT_2C mRNA with TRPV1 in TG cells. 5HT pretreatment evoked a significant increase in calcium accumulation in capsaicin-sensitive trigeminal neurons and enhanced capsaicin-evoked CGRP release, but had no significant effect when given alone. Sumatriptan, ketanserin, and granisetron treatment attenuated calcium accumulation and 5HT enhancement of capsaicin-evoked CGRP release. Together these results indicate that 5HT increases the activity of capsaicin-sensitive peripheral nociceptors, which can be attenuated by pharmacologically targeting peripheral 5HT receptors, thereby providing a mechanistic basis for peripheral craniofacial pain therapy.     

AMI梗死相关血管与氮末端脑钠素前体水平的相关性研究

目的探讨急性心肌梗死（AMI）患者梗死相关血管与氮末端脑钠素前体（NT-proB-NP）的相关性。方法入选诊断明确的因AMI行急诊经皮冠状动脉介入治疗术患者共计112例,其中男性91例,女性21例。根据选择性冠状动脉造影影像学特征结合心电图诊断的AMI部位来确定梗死相关血管。所有患者入院后均行血浆NT-proBNP检测及经胸超声心动图等检查,分析其与梗死相关血管的相关性。结果梗死相关血管为前降支的患者NT-proBNP水平要明显高于梗死相关血管为回旋支或右冠状动脉患者,其差异有显著统计学意义（2069.071817.68versus969.91569.83or1164.811075.79pg/ml,P=0.004）。结论血浆NT-proBNP水平与AMI患者的梗死相关血管有关,NT-proBNP能反映心肌急性缺血损伤的程度及病情轻重。     

B型脑钠肽对预测心力衰竭时恶性心律失常的价值

目的探讨左心衰竭患者血浆B型脑钠肽（BNP）浓度与恶性室性心律失常的关系。方法采用荧光免疫法测定52例左心衰竭患者入院时和治疗2周后的BNP浓度,连续心电监测住院期间（Lonwn分级Ⅲ级以上）的恶性室性心律失常、心脏性猝死、心力衰竭加重和急性心肌梗死等事件。结果随着BNP浓度的增高,恶性室性心律失常和急性心脏事件的发生率也明显增高（P〈0．05）;随着心功能的好转,BNP浓度下降（P〈0．05）,恶性室性心律失常和急性心脏事件的发生率也下降（P〈0．05）。结论血浆BNP浓度对心力衰竭时恶性心律失常事件的发生具有重要预测价值。     

脑钠肽对早发急性心肌梗死患者近期预后的影响

目的探讨血浆脑钠肽(BNP)浓度对早发急性心肌梗死(AMI)患者近期预后的预测价值。方法检测90例AMI患者(男<55岁,女<65岁)入院时的血浆BNP和肌钙蛋白T(TnT)浓度,记录患者住院和平均随访6个月期间的心血管事件(心血管意外死亡、心力衰竭、再发心绞痛或再发心肌梗死),分析BNP与TnT的相关性及BNP对近期预后的预测价值。结果早发AMI患者平均BNP浓度高于对照组[(238.74±131.59)pgmlvs.(38.70±23.81)pgml,P<0.01]。早发AMI组BNP与TnT成正相关(r=0.805,P<0.01)。早发AMI患者心血管意外死亡再发心绞痛再发心肌梗死事件组BNP与无此事件组相比较,差异无显著性(P>0.05);发生心力衰竭或复合心血管事件组BNP高于未发生组[(337.75±66.05)pgmlvs.(229.08±132.61)pgml,P<0.05;(304.05±134.94)pgmlvs.(214.37±120.86)pgml,P<0.01]。多变量回归分析,BNP是预测早发AMI患者近期心血管事件的有效指标(RR:1.831,95%CI1.086～3.514,P=0.016)。结论血浆BNP可以反映早发AMI患者心肌坏死的程度和预测近期预后。