铁缺乏对大鼠畸变产物耳声发射的影响

目的 观察铁缺乏大鼠畸变产物耳声发射（DPOAE）的一般特征及幅值变化,探讨铁缺乏对DPOAE的影响机制。方法 18只大鼠随机分为正常对照及实验组,缺铁饮食饲养法制备动物模型,实验及动物处死前检测DPOAE,并进行耳蜗肌动蛋白免疫组化检测,分析DPOAE变化及可能机制。结果 铁缺乏组大鼠20个测试耳中,12耳2．0kHz以上频率点的DPOAE幅值略有降低,耳蜗免疫组化检测显示其外毛细胞的肌动蛋白免疫组化无明显变化;另8耳2．0kHz以上频率点的幅值下降明显,尤以2．0kHz处为,相应的耳蜗免疫组化染色显示外毛细胞肌动蛋白免疫反应活性明显降低。结论 铁缺乏可影响DPOAE幅值,其机制可能与耳蜗听毛细胞肌动蛋白免疫反应活性降低及组织缺氧有关。     

缺铁与胆囊结石形成关系的研究

本文检测了 110例 (男 32 ,女 78)胆囊结石病人的血清铁水平 ,低于正常值者 31例 ,占 2 8 2 % ;其中女性 2 5例 ,占80 6 % ,男性仅 6例 ,占 19 4%。铁在肝脏的酶代射过程中扮演着重要角色 ,因此 ,缺铁可能改变胆固醇的代谢 ,增强胆囊结石的形成。     

Haematologic consequences of viral infections including serum iron status

Twenty-seven children with mumps or chickenpox were taken as a model to evaluate the haematological consequences of viral infections including serum iron status. Blood samples were obtained from all patients at presentation and on the 21 st day of the disease. While haemoglobin, haematocrit, and meam corpuscular volume levels were similar in two measurements (P>0.05), the mean leucocyte, absolute lymphocyte and thrombocyte counts, mean serum iron, serum iron binding capacity and transferrin saturation levels were lower at presentation than on the 21 st day of the disease. The serum iron levels were below 30 g/dl in 16 (59.2%) patients at presentation while only 4 (14.8%) had low values on 21 st day. Twenty-four (88.9%) patients had an increment in the serum iron binding capacity levels and 2 (7.6%) reached values above the normal range on the 21 st day. Int 21 (77.8%) patients, the transferrin saturation levels were below the expected ranges at presentation but 26 (96.3%) showed an increment on the 21 st day. However, the mean ferritin level was higher at presentation. Therefore, during the evaluation of patients for anaemia, the presence of a recent acute viral infection should be documented so as to avoid unnecessary iron medication.     

血清铁蛋白,血清铁与冠心病及其有关危险因素关系的临床研究

目的：研究血清铁蛋白（ＳＦ）、血清铁（ＳＩ）与冠心病（ＣＨＤ） 之间的关系以及ＳＦ、ＳＩ与ＣＨＤ有关危险因素的相关关系。方法：测定４３ 例心肌梗塞（ＭＩ）,４４ 例心绞痛（ＡＰ） 患者的ＳＦ、ＳＩ、血脂、血糖（ＢＧ）、血压、腰臀比（ＷＨＲ） 、体重指数（ＢＷＩ）水平,与４０ 例健康对照组进行分析。结果：ＡＰ组、ＭＩ组男、女、总体ＳＦ水平分别明显高于对照组（Ｐ＜ ０．０５～０．００１）,但女性升高不如男性明显;ＳＦ水平与ＷＨＲ、甘油三脂（ＴＧ）、低密度脂蛋白（ＬＤＬ）呈正相关（ｒ＝ ０．４６,０．３４,０．４４）,与高密度脂蛋白（ＨＤＬ）呈负相关（ｒ＝ － ０．３３）。结论：体内ＳＦ增加是ＡＰ、ＭＩ的主要易发因素之一;ＳＦ水平受营养因素特别是某些脂代谢及腹部脂肪分布的影响     

催化动力学光度法测定痕量铁

目的 :研究测定痕量铁的新体系。方法 :催化动力学分光光度法。结果 :在NaOH介质中 ,Fe(Ⅲ )对H2 O2 氧化二溴邻硝基苯基荧光酮 (DBON -PF)退色反应有强烈催化作用。据此建立了测定痕量铁的动力学新方法 ,该法检出限为 8 0× 10 -10 g/ml,线性关系 0～ 0 2 μg/ 10ml。 结论 :本方法灵敏度高 ,选择性好 ,可直接测定茶叶中的微量铁并获满意结果     

LazaroidU—75412E试验性治疗大鼠矽肺研究

目的　鉴于Ｌａｚａｒｏｉｄｓ（２１ － 氨基类固醇） 类药物具有较强的抗铁离子依赖脂质过氧化特性,通过治疗大鼠实验性矽肺研究探讨铁离子依赖脂质过氧化与矽肺的关系并寻找新的抑制矽肺发展的药物。方法　大鼠经气管注入石英粉尘形成矽肺后,灌胃给予Ｌａｚａｒｏｉｄ Ｕ－ ７５４１２Ｅ 进行治疗三个月后观察疗效。结果　治疗组肺灌洗液中细胞总数、白细胞数、ＳＯＤ、ＭＤＡ 含量、肺组织胶原纤维化分级均显著低于矽肺对照组（ Ｐ＜ ０－０５） ,治疗期间未见有明显的肝、肾毒副作用发生。结论　结果说明该药具有抑制石英所致的肺组织炎性反应、脂质过氧化反应以及纤维化发展的作用。此外,实验结果提示了铁离子依赖脂质过氧化在矽肺发病机理中起一定作用。     

间断补铁治疗缺铁性贫血的效果

①目的观察间断补铁治疗缺铁性贫血的效果和副作用。②方法将４５例缺铁性贫血病人分为每日补铁组和间断补铁组,观察铁剂治疗后红细胞指标和血清铁蛋白的变化以及副作用的不同。③结果每日补铁组和间断补铁组补铁后红细胞各指标比较差异无显著性（ｔ＝１．２３～１．６７,Ｐ＞０．０５）。血清铁蛋白两组比较差异无显著性（ｔ＝１．８３,Ｐ＞０．０５）。间断补铁组恶心、胃部不适发生率明显降低,与对照组比较差异有显著性（χ２＝１０．７１,１１．８２,Ｐ＜０．０１）。④结论间断补铁与每日补铁治疗缺铁性盆血相比较疗效相近,但副作用小。     

Tissue potassium,selenium, and iron levels associated with gastric cancer progression

The contents of 10 minor and trace elements in histologically confirmed gastric adenocarcinomas and their corresponding normal gastric mucosal tissues obtained from 39 patients at the time of gastric resection were simultaneously determined by instrumental neutron activation analysis. Specimens were irradiated by reactor neutrons and subsequently subject to direct analysis using a high-resolution HPGe -spectrometer. Univariate analysis revealed that gastric cancer tissues had significantly higher concentrations of Fe, K, Mg, Na, Rb, Se, and Zn than normal gastric mucosal tissues. However, multivariate analysis found that Fe, K, and Se were independent elements that associated with gastric cancer. Upon further evaluation of their clinical significance, we found a high tissue K level was related to lymphatic duct metastasis. High Se tissue levels were linked to intestinal type adenocarcinoma. A positive correlation was found between high Fe levels and vascular involvement. These findings suggest that Fe and K are associated with gastric cancer progression. Se is involved in carcinogenesis of stomach in high-risk areas. The mechanisms that underlie the corresponding pathohistological features deserve further study.     

Animal models of Parkinson's disease: An empirical comparison with the phenomenology of the disease in man

Summary Animal models are an important aid in experimental medical science because they enable one to study the pathogenetic mechanisms and the therapeutic principles of treating the functional disturbances (symptoms) of human diseases. Once the causative mechanism is understood, animal models are also helpful in the development of therapeutic approaches exploiting this understanding. On the basis of experimental and clinical findings. Parkinson's disease (PD) became the first neurological disease to be treated palliatively by neurotransmitter replacement therapy.The pathological hallmark of PD is a specific degeneration of nigral and other pigmented brainstem nuclei, with a characteristic inclusion, the Lewy body, in remaining nerve cells. There is now a lot of evidence that degeneration of the dopaminergic nigral neurones and the resulting striatal dopamine-deficiency syndrome are responsible for its classic motor symptoms akinesia and bradykinesia. PD is one of many human diseases which do not appear to have spontaneously arisen in animals. The characteristic features of the disease can however be more or less faithfully imitated in animals through the administration of various neurotoxic agents and drugs disturbing the dopaminergic neurotransmission.The cause of chronic nigral cell death in PD and the underlying mechanisms remain elusive. The partial elucidation of the processes underlie the selective action of neurotoxic substances such as 6-hydroxydopamine (6-OHDA) or 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), has however revealed possible molecular mechanisms that give rise to neuronal death. Accordingly, hypotheses concerning the mechanisms of these neurotoxines have been related to the pathogenesis of nigral cell death in PD.The present contribution starts out by describing some of the clinical, pathological and neurochemical phenomena of PD. The currently most important animal models (e.g. the reserpine model, neuroleptic-induced catalepsy, tremor models, experimentally-induced degeneration of nigro-striatal dopaminergic neurons with 6-OHDA, methamphetamine, MPTP, MPP⁺, tetrahydroisoquinolines, -carbolines, and iron) critically reviewed next, and are compared with the characteristic features of the disease in man.     

1314例育龄妇女缺铁性贫血发病现状调查

目的 :研究育龄妇女缺铁性贫血 (IDA)的发病现状及营养状况与IDA的关系。方法 :检测青岛市城市及农村 1314例妊娠期和非妊娠期育龄妇女的外周血红蛋白浓度 (Hb)、平均红细胞体积 (MCV)、平均红细胞血红蛋白量 (MCH)、血清铁蛋白 (SF) ,并进行个人问卷调查 ,应用营养计算软件评价膳食营养。结果 :1314例育龄妇女IDA发病率为 2 0 .4 0 % ,其中非孕妇的发病率高于孕妇。农村育龄妇女的发病率明显高于城市。孕妇中孕≥ 2 8周组发病率最高 (4 0 % ) ,与其他孕周组相比差异有高度显著性 (P <0 .0 1)。营养评价结果显示非孕妇组热量、维生素A、E、B1、B2 、PP、C的缺乏率高于孕妇组(P <0 .0 0 1)。结论 :农村育龄妇女及孕 2 8周以上的孕妇为IDA高发人群。应加强对农村育龄妇女的膳食营养宣教及指导 ,对孕晚期的孕妇及时采取有针对性的干预措施。