Histiocytosis X. S-100 protein, peanut agglutinin, and transmission electron microscopy study

Twenty-seven cases of histiocytosis X (HX) for which paraffin blocks were available were studied with the use of S-100 protein immunohistochemistry, peanut agglutinin affinity histochemistry, and transmission electron microscopy. The results show that these techniques did enable identification of Langerhans'-type histiocytes in 88.5%, 75%, and 47.4% of cases, respectively. All techniques were proved to be of some diagnostic value for HX, but none was able to confirm the diagnosis in all instances and none could foretell the prognosis of the patients. This study shows that besides the Langerhans' cells, the indeterminate cells of the skin and the interdigitating dendritic reticulum cells of the lymph node may also be involved in this process. Moreover, some multinucleate giant cells and foamy cells may be derived from Langerhans' and related cells.     

北京市三所高校大学生SARS流行期的心理状态现况调查

目的 :了解SARS流行时期大学生在封闭式管理下的心理状况。方法 :采用症状自评量表、ZUNG氏焦虑自评量表、ZUNG氏抑郁自评量表和一般状况调查表 ,以分层整群抽样的方法 ,对北京市三所重点大学 62 80名在校本科大学生和研究生进行了心理状况自评问卷调查。结果 :症状自评量表的因子阳性检出率为 7 3 % ,各因子得分均明显低于既往北京市大学生调查结果 ;除恐怖因子和精神病性因子外 ,各因子得分均低于或接近国内常模 (t=2 17-5 3 65 ,P <0 0 5 )。焦虑症状阳性检出率为 9 5 % ,抑郁症状阳性检出率为 2 9 6%。结论 :北京市SARS流行期间大学生存在焦虑、抑郁症状 ;采取了有效的传染病防治和健康教育等措施后大学生群体的心理健康状况良好。     

慢性心功能不全时经主动脉移植干细胞的可行性研究

心肌梗死或/和慢性心功能不全时,心脏干细胞移植是一项颇有应用前景的新的治疗技术。但是,对于非缺血性心脏病所致的慢性心功能不全,目前所采用的移植路径有一定的局限性。本试验拟研究慢性心功能不全时,封堵主动脉窦上部经主动脉根部移植干细胞是否可行。阿霉素所致的慢性心功能不全兔模型,采用双球囊封堵主动脉窦上部经主动脉根部自体移植骨髓单核细胞,4周后评价心功能。在封堵主动脉窦上部经主动脉根部移植干细胞时,无1例因移植手术死亡。双球囊充盈时造影显示,主动脉窦显影良好,大部分情况下,左、右冠状动脉可显影。骨髓单核细胞移植4周后,左室射血分数改善明显(P=0 .0 34)。所以,慢性心功能不全时,封堵主动脉窦上部经主动脉根部移植干细胞安全可行。     

人睾丸组织中成熟精子的分离方法初探

探索简单、适用的体外分离睾丸组织中成熟精子的方法,以用于男性无精子症病人行卵母细胞内单精子注射受精-胚胎移植为目的。用含不同浓度透明质酸酶的10 %人血白蛋白人类输卵管液培养人睾丸曲细精管组织匀浆2 4 h,再用Percoll梯度离心法洗涤后计算所获各级精子的总数,并设置前后对照和空白对照进行比较。用不同浓度透明质酸酶处理后的4个实验组分别与2个对照组比较,实验组所获得的各级精子的总数高于对照组,有显著差异(P<0 .0 1)。实验组中透明质酸酶浓度分别为5 0、10 0、15 0 u/ ml的10 %人血白蛋白人类输卵管液处理组获得的各级精子总数组间比较,处理前对照和处理后空白对照之间比较,无显著差异(P>0 .0 5 )。而用浓度为2 0 0 u/ ml的10 %人血白蛋白人类输卵管液处理组获得的各级精子的总数与其它浓度处理组之间比较存在统计学差异(P<0 .0 1) ,其所获得的各级精子总数相似,但活动能力较其它浓度处理组低。透明质酸酶结合Percoll梯度离心可从人睾丸曲细精管组织匀浆中分离出较多更纯的成熟精子,但过高浓度的透明质酸酶可能会影响分离出的精子的活动能力。     

一种基于微处理器的消化道内按摩装置的研制

首先简要回顾了微电子机械系统技术研究进展,然后介绍了一种基于微处理器的消化道内按摩装置的基本结构,工作原理和特点。尤其详细介绍了采用MSP430F123微处理器产生周期脉冲,来控制整个按摩胶囊的供电。总的说来,消化道内按摩装置具有重要的临床应用价值和商业价值,开发消化道内按摩装置对我国生物医学工程产业和微电子机械系统产业的发展都有着积极和深远的意义。     

住院网络成瘾青少年的父母养育方式与人格特征

目的探讨住院网络成瘾(Internet Addiction Disorder,IAD)青少年的父母养育方式及人格特征。方法采用网络成瘾临床诊断标准、艾森克人格问卷(EPQ),父母养育方式评定量表(EMBU),对596名被诊断为IAD的青少年施测,比较住院IAD者与对照组的差异。结果IAD青少年父亲情感温暖(FF1)分值低于对照组,过分干涉(FF3)、拒绝否认(FF5)分值高于对照组。IAD青少年的母亲情感温暖(MF1)分值亦低于对照组,而过分干涉保护(MF2)、拒绝否认(MF3)及惩罚严厉(MF4)因子均高于对照组(P<0.01)。IAD青少年的内外向(E)因子分明显低于对照组(P<0.01)、精神质(P)因子分高于对照组(P<0.05)。结论住院IAD青少年存在不良的家庭教养方式,同时存在人格问题。     

眉部运动的显微外科解剖学研究及其临床意义

目的：为解决除皱术中眉毛上提效果欠佳,不够持久的问题。方法：对10例新鲜尸体进行了大体及显微解剖。结果：证实了额肌深面“滑动层”和“滑动间隙”的存在,观察了眉内侧2／3自皮肤向深面发出固定到眉嵴处的眉毛支持韧带,外侧上方的颞融合线和下方的眉限制韧带静态固定结构,上述结构决定了眉毛的形态;阐述了额肌、皱眉肌和降眉肌的眉毛动力机制,探讨了老年性外侧眉毛下垂主要由于外侧的滑动脂肪垫向下“疝出”所致。结论：通过破坏“滑动间隙”,切断颞融合线和眉限制韧带,切除外侧滑动脂肪垫,达到眉部上提的良好、持久效果。     

Noggin signaling from Xenopus animal blastomere lineages promotes a neural fate in neighboring vegetal blastomere lineages.

In Xenopus, localized factors begin to regionalize embryonic fates prior to the inductive interactions that occur during gastrulation. We previously reported that an animal-to-vegetal signal that occurs prior to gastrulation promotes primary spinal neuron fate in vegetal equatorial (C-tier) blastomere lineages. Herein we demonstrate that maternal mRNA encoding noggin is enriched in animal tiers and at low concentrations in the C-tier, suggesting that the neural fates of C-tier blastomeres may be responsive to early signaling from their neighboring cells. In support of this hypothesis, experimental alteration of the levels of Noggin from animal equatorial (B-tier) or BMP4 from vegetal (D-tier) blastomeres significantly affects the numbers of primary spinal neurons derived from their neighboring C-tier blastomeres. These effects are duplicated in blastomere explants isolated at cleavage stages and cultured in the absence of gastrulation interactions. Co-culture with animal blastomeres enhanced the expression of zygotic neural markers in C-tier blastomere explants, whereas co-culture with vegetal blastomeres repressed them. The expression of these markers in C-tier explants was promoted when Noggin was transiently added to the culture during cleavage/morula stages, and repressed with the transient addition of BMP4. Reduction of Noggin translation in B-tier blastomeres by antisense morpholino oligonucleotides significantly reduced the efficacy of neural marker induction in C-tier explants. These experiments indicate that early anti-BMP signaling from the animal hemisphere recruits vegetal equatorial cells into the neural precursor pool prior to interactions that occur during gastrulation.