一种自制牙本质粘接剂的粘接性能研究(摘要)

作者研制了一种含30～40％甲基丙烯酸-β-羟乙酯和3～8％戊二醛混合物的粘接剂。现就其对牙本质的粘接性能,摘要报道如下: 材料与方法 取新鲜离体人磨牙制备成平滑的牙本质表面,水洗吹干后分别用:①37％磷酸;②10％柠檬酸与3％三氯化铁混合液(简称10-3溶液);③18％乙二胺四乙酸二钠     

Effect of water restrictions on the physiological parameters,psychological behavior and brain c-Fos expression in rat

1 Introduction Exposure to hostile stressors causes a series of coor- dinated responses in the body, such as alterations of neu- roendocrine secretion, immune reaction and behavioral manifestation to maintain homeostasis stability and sur-vival of the organisms. Stressors are divided into two main categories: physical, or systemic, and psychological, or emotional / processive. Each stressor might activate a spe- cific central pathway to induce a special neuroendocrine response, even cause stre…     

肾移植术后并发大腿感觉功能障碍(附28例报告)

目的 提高对肾移植术后并发大腿感觉功能障碍的认识水平。方法 对179例肾移植术后患者进行问诊和大腿皮肤针刺检查。结果 179例中发现28例存在手术侧大腿感觉功能障碍。其中78例移植肾动脉与髂内动脉吻合的患者中有11例，分别为大腿前面7例、外侧面2例、前面和外侧面2例：101例移植肾动脉与髂外动脉吻合的患者中有17例，分别为大腿前面13例、外侧面1例、前面和外侧面3例。除1例为持续性感觉功能障碍外，其余27例均在术后半年内自愈。结论 肾移植术后出现手术侧大腿皮肤感觉功能障碍是较常见的并发症。肾移植术前应告知患者可能出现这种并发症。     

急性鼠药中毒38例救治体会

目前农村集市上销售的鼠药很多，有些是国家禁止使用的毒鼠灵、氧碳乙碳胺，如“一步倒”、“三步亡”，“全杀光”等，灭鼠力强，但对人类的健康也造成了很大危害，现就我院近年收治的急性鼠药中毒38例报道如下。     

外伤性颞浅动脉-眼上静脉痿造影诊断一例

患者男，41岁，半年前车祸头颅外伤后在侧耳鸣，安静时明显。头颅CT未见骨折与颅内损伤。4个月前耳鸣消失，3个月前眼球轻度突出，结膜红润。50d前眼球突出突然加重，夜间休息悍左侧额颞部肿胀感，起立活动后减轻，进行性下睑外翻，肿胀，视力下降，视物模糊。查体：左眼裂小，眼球隆出，上睑下垂，下脸充血外翻，结膜水肿，初力下降，左眼上方及左颞部可闻及吹风样血管杂音。     

八例巨大型颈静脉球瘤的影像学研究

目的提高对颈静脉球瘤的影像学认识和诊断。方法对8例经病理明确诊断的颈静脉球瘤的影像学资料进行回顾性分析。结果6例巨大型颈静脉球瘤MRI出现特异型表现,即典型的“盐和胡椒”征;DSA检查不仅能够术前明确肿瘤供血血管,而且同时进行栓塞治疗可减少随后术中出血。结论MRI DSA是巨大型颈静脉球瘤术前最有价值的影像学检查工具。     

Morphine Preconditions Purkinje Cells against Cell Death under In Vitro Simulated Ischemia-Reperfusion Conditions

Background: Morphine pretreatment via activation of [delta]1-opioid receptors induces cardioprotection. In this study, the authors determined whether morphine preconditioning induces ischemic tolerance in neurons.

Methods: Cerebellar brain slices from adult Sprague-Dawley rats were incubated with morphine at 0.1-10 [mu]m in the presence or absence of various antagonists for 30 min. They were then kept in morphine- and antagonist-free buffer for 30 min before they were subjected to simulated ischemia (oxygen-glucose deprivation) for 20 min. After being recovered in oxygenated artificial cerebrospinal fluid for 5 h, they were fixed for morphologic examination to determine the percentage of undamaged Purkinje cells.

Results: The survival rate of Purkinje cells was significantly higher in slices preconditioned with morphine (>= 0.3 [mu]m) before the oxygen-glucose deprivation (57 +/- 4% at 0.3 [mu]m morphine) than that of the oxygen-glucose deprivation alone (39 +/- 3%, P < 0.05). This morphine preconditioning-induced neuroprotection was abolished by naloxone, a non-type-selective opioid receptor antagonist, by naltrindole, a selective [delta]-opioid receptor antagonist, or by 7-benzylidenenaltrexone, a selective [delta]1-opioid receptor antagonist. However, the effects were not blocked by the [mu]-, [kappa]-, or [delta]2-opioid receptor antagonists, [beta]-funaltrexamine, nor-binaltorphimine, or naltriben, respectively. Morphine preconditioning-induced neuroprotection was partially blocked by the selective mitochondrial adenosine triphosphate-sensitive potassium channel antagonist, 5-hydroxydecanoate, or the mitochondrial electron transport inhibitor, myxothiazol. None of the inhibitors used in this study alone affected the simulated ischemia-induced neuronal death.     

华东地区汉族脂肪分化相关蛋白基因SNP的研究

目的研究华东地区汉族2型糖尿病病人脂肪分化相关蛋白(ADRP)基因的单核苷酸多态(SNP).方法使用PCR测序方法,对ADRP基因的启动子、外显子以及临近的内含子进行测序,确定该基因在华东地区汉族2型糖尿病病人中所存在的SNP. 结果所测ADRP基因片段总长度为5 003个碱基,有21个SNP,高频、低频分别是5、16个. 结论ADRP基因在华东地区汉族2型糖尿病病人中存在SNP;对某些SNP进行基因分型可以进一步确定ADRP基因中与2型糖尿病相关的SNP存在情况.     

Isoflurane Preconditions Hippocampal Neurons against Oxygen-Glucose Deprivation: Role of Intracellular Ca2+ and Mitogen-activated Protein Kinase Signaling

Background: Isoflurane preconditions neurons to improve tolerance of subsequent ischemia in both intact animal models and in in vitro preparations. The mechanisms for this protection remain largely undefined. Because isoflurane increases intracellular Ca2+ concentrations and Ca2+ is involved in many processes related to preconditioning, the authors hypothesized that isoflurane preconditions neurons via Ca2+-dependent processes involving the Ca2+- binding protein calmodulin and the mitogen-activated protein kinase-ERK pathway.

Methods: The authors used a preconditioning model in which organotypic cultures of rat hippocampus were exposed to 0.5-1.5% isoflurane for a 2-h period 24 h before an ischemia-like injury of oxygen-glucose deprivation. Survival of CA1, CA3, and dentate neurons was assessed 48 later, along with interval measurements of intracellular Ca2+ concentration (fura-2 fluorescence microscopy in CA1 neurons), mitogen-activated protein kinase p42/44, and the survival associated proteins Akt and GSK-3[beta] (in situ immunostaining and Western blots).

Results: Preconditioning with 0.5-1.5% isoflurane decreased neuron death in CA1 and CA3 regions of hippocampal slice cultures after oxygen-glucose deprivation. The preconditioning period was associated with an increase in basal intracellular Ca2+ concentration of 7-15%, which involved Ca2+ release from inositol triphosphate-sensitive stores in the endoplasmic reticulum, and transient phosphorylation of mitogen-activated protein kinase p42/44 and the survival-associated proteins Akt and GSK-3[beta]. Preconditioning protection was eliminated by the mitogen-activated extracellular kinase inhibitor U0126, which prevented phosphorylation of p44 during preconditioning, and by calmidazolium, which antagonizes the effects of Ca2+-bound calmodulin.