The interleukin-5 messenger RNA expression in a patient with idiopathic hypereosinophilic syndrome

Interleukin-5 has a specific role in various eosinophilic activities. It is the predominant cytokine produces by activated T-lymphocytes isolated from patients with idiopathic hypereosinophilic syndrome. We studied a young patient suffering from idiopathic hypereosinophilic syndrome who presented with Horner's syndrome, peripheral neuropathy and skin ulcers. The IL-5 gene expression by CD4⁺ T-lymphocytes and the peripheral eosinophil count were raised. The skin ulcers continued to deteriorate despite a swift reduction of the IL-5 gene expression and peripheral eosinophil count following systemic corticosteroid treatment. We suggest that peripheral eosinophilia may not be responsible for the damage in skin lesions and more aggressive treatment may be required.     

Neurotrophin-like immunoreactivity in the human pre-term newborn, infant, and adult cerebellum

The immunohistochemical occurrence of the neurotrophin (NT) proteins nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-4 (NT-4), and neurotrophin-3 (NT-3) is shown in the pre-term newborn, infant, and adult human post-mortem cerebellum. The NT-like immunoreactive structures were unevenly distributed and showed regional differences among cerebellar lobules and folia. NGF-, NT-4-, and NT-3-positive neuronal perikarya were observed in all specimens examined. At variance with the other neurotrophins, the BDNF antiserum labelled neuronal cell bodies only in newborn life and infancy, as well as extensive nerve fibre systems, whose density increased with age. The NT-antibodies, tested by Western blot on human cerebellum homogenates, revealed immunoreactive bands corresponding to proteins of heterogenous molecular weight. The results obtained provide a first demonstration of the tissue localization of the NTs in the human cerebellum from perinatal to adult age, thus suggesting their involvement in the development, differentiation and maintenance of the cerebellar connectivity. Codistribution of the four NTs or sets of them was observed in cortical and deep nuclei neurons. Multiple trophic roles for NTs, encompassing the classic target-derived and local mechanisms of support, are envisaged as significant in development, differentiation, and maintenance of the human cerebellar connectivity.     

显微定量法测定中成药中猪牙皂的含量

目的 :制定猪牙皂在脐风散与惊风散中的显微定量标准。方法 :用显微定量法 ,以猪牙皂特有的石细胞为显微特征物 ,对脐风散与惊风散中的猪牙皂进行测定。结果 :猪牙皂含量与每毫克特征数呈显著的线性正相关 ,回归方程为 y =61 .42 x -1 .1 0× 1 0 - 3(γ=1 .0 0 ,α=0 .0 5 )。结论 :显微定量法测定脐风散与惊风散中猪牙皂的含量是可行的 ,结果可靠     

老年病人睡眠状况及护理干预研究进展

综述了老年人睡眠质量及其影响因素、睡眠障碍的危害、老年病人睡眠的护理干预。建议进行前瞻性干预试验,为改善老年人的睡眠质量提供依据。     

葡萄球菌属对常用抗生素耐药情况调查

目的：了解葡萄球菌属，特别是耐甲氧西林葡萄球菌（MRS）的耐药情况，为临床用药提供参考。方法：从2002年1－7月送检的住院病人的血、痰、脓液、分泌物等标本中分离出的金黄色葡萄球菌、表皮葡萄球菌及其他血浆凝固酶阴性的葡萄球菌共105株，并进行药敏和多重耐药分析。结果：MRS的分离率较高，为68．6％，耐甲氧西林金黄色葡萄球菌（MRSA）为69．2％；耐甲氧西林表皮葡萄球菌（MRSE）为63．3％。MRS较非耐甲氧西林葡萄球菌（MSS）耐药率明显高，且MRS比MSS多重耐率高得多；MRSA对四种不同作用机制的抗生素；泰能、阿米卡星、环丙沙星、复方新诺明具有很高的多重耐药率，达到50％以上。结论：鉴于MRS的高分离率和多重耐药率，在治疗感染性疾病时，应加强病原学检查，提高标本鉴定的阳性率；在有效的治疗MRS感染的同时还应注意遏制MRS的产生。     

基因芯片筛选大肠侧向发育型肿瘤相关基因的初步研究

目的 应用基因芯片初步筛选大肠侧向发育型肿瘤(LST)相关基因，为进一步研究大肠癌的发病机制提供新的思路和线索。方法 抽提大肠侧向发育型肿瘤癌细胞株、SW480细胞株、LoVo细胞株的总RNA并纯化mRNA；将18816种人类基因及LST片段PCR产物用Bioroboties公司的BG600点样仪点样于纤维膜上，制成基因芯片。将3个样品的mRNA分别逆转录合成探针并^33 P标记，同芯片杂交。严格洗片后Fuji film公司FLA 3000扫描仪扫描芯片信号图象，ArrayGauge 1．0软件分析比较3种细胞株中差异表达基因。结果和结论 在18816种人类基因中存在着一系列LST同普通大肠癌细胞株之间的差异表达基因。在本研究中共有差异表达基因97个，其中共上调58个，共下调39个。表明其可能存在不同的肿瘤发生机制．故进一步研究其相关基因，在分子水平上阐明其发生机制及与大肠癌的关系具有重要意义。     

高压交变电磁场对心血管疾病康复的应用

应用高压交变电磁场对134例冠心病及高血压病患者进行临床应用，结果显效67例，好转55例，无效12例；有效地改善了脂蛋白代谢，降低TG、Tc、LDL-c及致动脉硬化指数．升高HDL-c浓度；降低了高血压病患者的血压；改善了冠心病患者的心电图；同时可改善心功能参数及心室负荷。由此可见，高压交变电磁场能抗动脉粥样硬化，对心血管疾病有显著的治疗作用。     

Methylation, a major mechanism of p16/CDKN2 gene inactivation in head and neck squamous carcinoma.

We studied 11 head and neck squamous carcinoma (HNSC) cell lines and 46 primary tumors for p16 gene status by protein, mRNA, and DNA genetic/epigenetic analyses to determine the incidence, the mechanism(s), and the potential biological significance of its inactivation. Of the 11 cell lines, only 1 showed intact p16 and 10 lacked its protein and mRNA; DNA analysis of these 10 cell lines showed 2 homozygous deletions, 6 methylations at exon 1 and 2, and 2 with no detectable abnormalities. In primary tumors, 16 (34.7%) of the 46 showed detectable p16 protein and mRNA; of these, 12 had no DNA abnormalities and 4 had only exon 2 methylation. Loss of p16 expression was found in three tumors with concurrent mutation at exon 2 and methylation at exon 2 (two) and both 1 and 2 (one). Of the 30 tumors that lacked p16 protein, 27 also lacked mRNA, 1 had detectable p16 mRNA, and 2 failed RT-PCR amplification. Twenty-two of the thirty tumors showed DNA alterations and eight manifested no abnormalities; DNA alterations comprised 6 homozygous deletions, 2 concurrent mutations and methylation of exon 2, and 13 with methylation at exon 1 and exons 1 and 2 (12 with methylation only and 1 with mutation) at exon 1. Except for patients' gender (P = 0.02), no significant correlation between p16 and clinicopathological factors was observed. We conclude that in HNSC 1) intragenic p16 alterations are infrequent events, 2) methylation of exon 1 constitutes a common mechanism in silencing the p16 gene, 3) p16 inactivation may play an important role in the early development and progression of HNSC, and 4) no association between p16 alterations and conventional clinicopathological factors was noted in this cohort.     

阿片受体在异氟醚延迟预处理减轻兔心肌缺血再灌注损伤中的作用

Objective To investigate the role of opioid receptors in the protective effects of isoflurane-induced delayed preconditioning against myocardial ischemia-reperfusion (I/R) injury in rabbits. Methods Forty male New Zealand white rabbits weighing 2.0-2.5 kg were randomly assigned into 4 groups ( n = 10 each) : group I sham operation (S); group II I/R; group Ⅲ isoflurane + I/R (Iso) and group IV Iso + naloxone + I/R (Nal). Myocardial I/R was induced by 40 min occlusion of left anterior descending branch (LAD) of coronary artery followed by 120 min reperfusion. In group Ⅲ (Iso) 2% isoflurane in 100% O2 was inhaled for 2 h and I/R was produced 24 h later. In group IV (Nal) naloxone 6 mg/kg was given iv 10 min before 2 h of 2% isoflurane inhalation and I/R was produced 24 h later. At the end of 120 min reperfusion, infarct size (IS) and area at risk (AAR) were determined by Evan's blue and TTC staining. Myocardial ultrastructure was examined by electron microscopy. The phosphorylated p38MAPK protein expression in myocardium was determined by Western blot. Results The IS was significantly smaller in group Iso ( Ⅲ ) ( 19.7% ± 2.8%) than in I/R group ( II ) (37.8% ±1.7%) (P<0.05). The phosphorylated p38MAPK protein expression in myocardium was significantly lower in group Iso than in group I/R. Microscopic examination showed less myocardial damage in Iso group than in group I/R. The protective effects of delayed preconditioning by isoflurane was prevented by naloxone pretreatment. ConclusionOpioid receptors may be involved in the protective effects of delayed preconditioning by isoflurane against myocardial I/R injury.