Replicative senescence of human dermal fibroblasts affects structural and functional aspects of the Golgi apparatus

It is well recognized that the world population is ageing rapidly. Therefore, it is important to understand ageing processes at the cellular and molecular levels to predict the onset of age‐related diseases and prevent them. Recent research has focused on the identification of ageing biomarkers, including those associated with the properties of the Golgi apparatus. In this context, Golgi‐mediated glycosylation of proteins has been well characterized. Additionally, other studies show that the secretion of many compounds, including pro‐inflammatory cytokines and extracellular matrix–degrading enzymes, is modified during ageing, resulting in physical and functional skin degradation. Since the Golgi apparatus is a central organelle of the secretory pathway, we investigated its structural organization in senescent primary human dermal fibroblasts using confocal and electron microscopy. In addition, we monitored the expression of Golgi‐related genes in the same cells. Our data showed a marked alteration in the Golgi morphology during replicative senescence. In contrast to its small and compact structure in non‐senescent cells, the Golgi apparatus exhibited a large and expanded morphology in senescent fibroblasts. Our data also demonstrated that the expression of many genes related to Golgi structural integrity and function was significantly modified in senescent cells, suggesting a relationship between Golgi apparatus function and ageing.     

便携式负压吸引装置的设计及材料学特点

对负压吸引装置便携方式的研究一直是急救医学追求的目标之一，因为它能够极大地促进急救成功率。文章基于这种需要，研制了一套便携式负压吸引装置，并根据实际应用效果，选择优化的制造材料。研制的便携式负压吸引装置主要由特殊设计的储液罐及罐盖、负压产生装置、过渡接头等部分组成，关键部件采用特殊材料制作，体积小，质量轻，操作简单，易于携带，完全能满足临床抢救及治疗的需要。作为一种急救中必不可少的器械，便携式负压吸引装置在急救伤病员运输、转运，家庭急救，及无动力源环境等情况下，对于抢救患者及提高救治效果，具有极大的竞争优势和应用前景。     

指背腱膜的解剖学研究

目的 探讨指背腱膜的构成特点及临床意义。方法 在30只成人尸体手标本上，通过模拟手术，对指背腱膜的构成特点进行了应用解剖学观测。结果 指背腱膜的构成复杂，其中的外侧腱束、外侧束、外侧腱和中央束在手指畸形的发生中有着特殊的临床意义。外侧腱束主要形成伸近节指间关节的功能解剖机制；其与外侧束形成的密切纤维联系而具有协同外侧腱的功能；该腱束与屈肌腱鞘有联系又使其具有平衡屈肌和伸肌肌力的作用。中央束在指背腱膜的整体协调、畸形的发生及矫正过程中起着重要的功能。结论 通过对指背腱膜的解剖研究，可以解释因指屈、伸肌腱平衡被破坏后所形成的畸形。     

医疗仪器的人因工程学设计

人因工程学是一门边缘性应用科学，对医疗仪器的设计有重要的指导作用；本文论述了医疗仪器设计中必须考虑的人因工程学因素，包括人体对作业负荷的耐受性、人体尺度、人体的生物力学特性、人的适宜劳动姿势、人机界面、作业空间、安全性和维修性等。     

肝病治疗仪治疗高原慢性乙型肝炎患者的临床观察

目的观察WGLY-801型电脑肝病治疗仪对慢性乙型肝炎的治疗效果。方法随机选取慢性乙型肝炎患者144例,分为治疗组66例,在常规治疗基础上加用肝病治疗仪;对照组78例,采用常规治疗,观察两组治疗效果。治疗三疗程共45天(每疗程15天),观察临床症状、肝功能的动态变化,并对最终效果进行评价。结果经治疗后,两组患者临床症状、肝功能较前均有好转,但治疗组起效快,疗程明显缩短,疗效好,差异有明显统计学意义(p<0.05)。结论肝病治疗仪,操作简单,疗效确切,值得进一步推广应用。     

人胎儿前庭器超微结构的观察

对人胎儿前庭器超微结构的研究,国内外报道甚少。本文对18至36周人胎儿颞骨10具进行了扫描电镜和透射电镜的观察,并对应用Surface preparation法制做人胎儿前庭器标本的方法进行了探讨。本文观察所见:豚鼠平衡斑的生理状态与人胎儿很近似,体面积比人胎儿平衡斑小,感觉毛长,细胞排列更整齐。28周以后的胎儿因前庭周围骨质变硬,制做标本时可以分别取出两囊斑和壶腹嵴。     

福田4500型B超软故障检修与分析

通过福田4500型B超软故障检修与分析，介绍了该机故障检修分析过程及造成该故障的原因。     

Lower airway inflammatory responses to repeated very-low-dose allergen challenge in allergic rhinitis and asthma

BACKGROUND: Low-dose allergen challenge (LDAC) may be a useful tool for studying the capacity of allergens to induce airway inflammation in atopic subjects. OBJECTIVE: To evaluate lower airway inflammatory changes following repeated inhalation of very low doses of allergen (VLDAC) in non-asthmatic subjects with allergic rhinitis (NAAR) compared with mild allergic asthmatic subjects (AA). METHODS: Fourteen NAAR and 11 AA were seen out of the pollen season and had skin prick tests with common aeroallergens. Baseline spirometry (S) and methacholine challenge (MC) were done and blood and induced sputum (IS) differential cell counts were obtained. Each subject underwent VLDAC on four consecutive mornings with a relevant allergen. S, MC, and blood and IS samplings were repeated 6 h after the second and fourth VLDAC and one week later. RESULTS: Although there were, as expected, no changes in FEV1 or PC20 in either group, mean percentage eosinophils on IS were significantly increased in NAAR on day 2 of VLDAC and decreased in all but one subject on day 4, with a tendency to return to baseline levels one week later. In AA, there was a non-significant trend for sputum eosinophils to increase on day 2; four subjects showed a decrease of eosinophils on day 4 of VLDAC. There was a correlation between eosinophil cationic protein (ECP) levels and eosinophil counts in NAAR throughout the study. There were no variations in other sputum cells or blood inflammatory cells. CONCLUSION: VLDAC can increase the percentage of eosinophils in IS of NAAR subjects without associated respiratory symptoms nor physiological modifications. A reduction in eosinophilic response despite repeated exposure, more common in NAAR subjects, suggests an adaptation process that needs to be further evaluated.     

颅内血肿旋吸多导向清除装置

本装置提供一种对脑组织损伤轻清除脑血肿速度快的微创器械,以便更加有效地清除高血压脑出血后形成的脑血肿,减轻脑出血引起的脑损害,减少死亡;该装置由外套管、旋吸管、导向管和喷射管组成,用该装置可以对脑血肿实施旋转碎吸和多导向喷射冲洗;临床用该装置治疗400余例高血压脑出血病人,迅速减轻脑血肿占位效应,使大部分病人生命得到挽救,减少了后遗症,改善了生存质量;其疗效表明该装置是目前最为有效地脑血肿微创清除器械.