细胞周期素D1与p53蛋白在卵巢上皮性肿瘤的表达及意义

目的　探讨细胞周期素D1(CyclinD1)与 p5 3蛋白在卵巢上皮性肿瘤的表达及意义。 方法　 1990～1995年应用免疫组化法对 4 0例恶性卵巢上皮性肿瘤及 2 0例良性卵巢上皮性肿瘤组织进行CyclinD1与 p5 3蛋白检测。结果　良性卵巢上皮性肿瘤CyclinD1阳性表达为 10 0 % ,而恶性卵巢上皮性肿瘤CyclinD1阳性表达为37 5 %。良性卵巢上皮性肿瘤p5 3阳性表达为 15 0 % ,恶性卵巢上皮肿瘤 p5 3阳性表达为 4 7 5 %。CyclinD1在卵巢上皮癌G1与G2 、G3 中的阳性表达统计学差异有显著性 (P <0 0 5 ) ,p5 3蛋白在早期卵巢上皮癌与晚期卵巢上皮癌组织中的阳性表达 ,统计学差异有显著性 (P <0 0 5 ) ,p5 3蛋白的阳性表达在卵巢癌G1与G2 、G3 比较差异有显著性 (P <0 0 5 )。CyclinD1过表达的细胞同时也有 p5 3的过表达。 结论　CyclinD1与 p5 3蛋白在卵巢上皮性肿瘤的共同表达可能是促进卵巢上皮性肿瘤发展的因素。     

Characteristics of optic disc changes in Taiwanese patients with primary angle-closure glaucoma.

BACKGROUND AND PURPOSE: Primary angle-closure glaucoma (PACG) is the predominant form of glaucoma among Asians. Although numerous studies have been done to describe the characteristic optic disc changes in patients with primary open angle glaucoma (POAG) which is the predominant form of glaucoma among Western populations, few studies have evaluated the optic disc changes in patients with PACG. The aim of this study was to elucidate the characteristic intrapapillary and parapapillary disc changes in PACG in a cross-sectional study and to develop a practical approach to the detection of glaucomatous optic disc changes in PACG by ophthalmoscopic examination. METHODS: A total of 103 eyes in 103 PACG patients were studied. Forty one eyes of 41 age- and sex-matched healthy subjects served as controls. Three glaucoma-trained subspecialists examined stereophotographs of optic discs to evaluate the intrapapillary and parapapillary changes. The differences in PACG and control group eyes were compared. RESULTS: Concentric steep enlargement of the optic disc was found in 99 PACG eyes (96%). Local notching was noted in only 3 eyes, and vertically oval-shaped cupping of the optic disc in only 1 eye. Disc hemorrhage was not detected in any eye. Parapapillary atrophy of the alpha zone involving both temporal and nasal side of the optic disc and parapapillary atrophy of beta zone were significantly more frequent in the PACG group. The presence of an alpha zone or a beta zone simultaneously involving both the temporal and nasal side of the optic disc was associated with more severe optic nerve head damage. CONCLUSIONS: The intrapapillary change in the PACG group eyes reflected the development of cupping in PACG patients with small and compact optic discs. The parapapillary atrophy paralleled the intrapapillary optic disc cupping in eyes of the PACG group.     

Effects of Aging and Advanced Glycation on Gene Expression in Cerebrum and Spleen of Mice^1

Objective To analyze the effects of aging or advanced glycation on gene expression in the cerebrum and spleen of female C57BL/6J mice. Methods The gene expression profile wasdetermined by using cDNA expression arrays containing 588 cDNA.     

HPLC法测定VE霜的含量

目的　用HPLC法测定VE霜的含量。方法　将VE霜制成供试品溶液 ,经C1 8色谱柱 ,以甲醇为流动相 ,用紫外检测器在2 85nm处检测。结果　VE可与霜剂基质中的成分很好地分离 ,VE的线性范围为 0 .2～ 1.0mg ml,平均回收率为 98.82 % ,RSD为 1.92 %。结论　所建立的方法准确、可靠 ,适用于VE霜的含量测定。     

Exposure to 1-bromopropane causes ovarian dysfunction in rats.

Although 1-bromopropane has been used in chemical and electronic industries as an alternative to ozone layer-depleting solvents, its toxicity on female reproductive organs has not been fully elucidated. The aim of this experiment was to determine the effect of 1-bromopropane on female reproductive function in rats. Forty female Wistar rats were divided into four equal groups. Each group was exposed daily to 0, 200, 400, or 800 ppm of 1-bromopropane for eight h a day. After exposure for 7 weeks, all rats in the 800-ppm group became seriously ill and were sacrificed during the 8th week. The other dose groups were exposed for 12 weeks. In the 800-ppm group, but not in the other two exposed groups, body weight was significantly less than the control at each time point from 2 to 7 weeks after the beginning of exposure. Tests of vaginal smears showed a significant increase in the number of irregular estrous cycles with extended diestrus in the 400- and 800-ppm groups. Histopathological examination of the ovary showed a significant dose-dependent reduction of the number of normal antral follicles and a decrease in the number of normal growing follicles in the 400-ppm group. No significant change was found in plasma concentrations of LH or FSH in any group when compared with the control. Our results indicate that 1-bromopropane can induce a dose-dependent ovarian dysfunction in nonpregnant female rats associated with disruption in follicular growth process.     

Chronic lithium treatment inhibits pilocarpine-induced mossy fiber sprouting in rat hippocampus.

Lithium remains the gold standard in the treatment of bipolar disorder. Long-term treatment with lithium may lead to specific adaptational changes in gene expression that contribute to a neuroprotective effect. In this study, the pilocarpine model of spontaneous limbic epilepsy was used to induce mossy fiber sprouting (axonal growth of the dentate granule cells that synapse on the pyramidal cells of the CA3 region) to examine the prophylactic neuroprotective effects of lithium in vivo. There were four groups of animals: pilocarpine treated (Pil+/Li-); pilocarpine treated followed by lithium (Pil+/Li+); lithium alone (Pil-/Li+); control (Pil-/Li-). Timm staining was used to obtain density measurements in the stratum oriens and the inner molecular layer of the hippocampus. Mossy fiber density was higher in the pilocarpine-treated animals compared to controls. Chronic lithium following pilocarpine treatment attenuated the density of mossy fibers but lithium alone had no effect. No changes in hilar volume or neuronal number were detected using stereological procedures. The ability of lithium to attenuate activation-induced reorganization in the hippocampus provides evidence for its role as a neuroprotective agent in an in vivo model that may be relevant to its clinical effects in bipolar disorder.     

高原地区中毒型菌痢抢救休克、脑水肿51例体会

中毒型菌痢临床表现复杂 ,病情变化快 ,在整个抢救过程中应抓住主要环节 ,尽量诊断分型治疗。休克型以扩充血容量 ,纠正酸中毒基础上加用血管活性药物。脑水肿型以高渗脱水剂为主。混合型在使用扩血管药的基础上 ,采取补液、脱水的原则。     

钾通道阻滞剂对大鼠支气管平滑肌细胞增殖的影响

目的探讨电压依赖性延迟整流钾通道(K_V)、Ca²⁺激活钾通道(K_Ca)和ATP敏感性钾通道(K_ATP)对大鼠支气管平滑肌细胞(BSMC)增殖的影响。 方法应用免疫细胞化学、MTT微量比色分析法及流式细胞术,观察K_V,K_Ca和K_ATP对培养中大鼠BSMC增殖的影响。结果K_V阻断剂4-氨基吡啶(4-AP)显著促进大鼠BSMC增殖细胞核抗原的表达,提高BSMC吸光度值,使S+G₂M期细胞数显著增多,并显著提高基础状态下BSMC内Ca²⁺浓度,而K_Ca阻断剂四乙铵(TEA)和K_ATP阻断剂格列本脲(Glib)均无此效应。 结论大鼠BSMC K_V活性的抑制,可提高细胞内Ca²⁺浓度,促进细胞的增殖,而K_Ca和K_ATP对BSMC的增殖均无明显影响。     

Inhibition of Amiodarone‐Induced Lung Fibrosis but not Alveolitis by Angiotensin System Antagonists

Abstract: Earlier work in this laboratory showed that amiodarone induces apoptosis in alveolar epithelial cells by a mechanism inhibitable by angiotensin system antagonists. A variety of recent studies suggests a critical role for alveolar epithelial cell apoptosis in the pathogenesis of lung fibrosis. On this basis we hypothesized that amiodarone‐induced alveolar epithelial cell apoptosis and lung fibrosis in vivo might be inhibitable by the angiotensin converting enzyme inhibitor captopril or the angiotensin receptor antagonist losartan. Amiodarone‐induced lung fibrosis was induced in male Wistar rats by oral adminstration over six months. Replicate groups of rats received captopril or losartan in addition to amiodarone. Apoptosis was detected by increased total lung activity of caspase 3 and in situ end labeling (ISEL) of fragmented DNA. Collagen was localized and quantitated by the picrosirius red technique. Alveolar epithelial cell apoptosis was detected in amiodarone‐treated animals as early as three weeks after the start of amiodarone administration; by six months exposure, the incidence of alveolar epithelial cell apoptosis was significantly reduced by coadministration of captopril or losartan. Alveolar wall collagen accumulation also was significantly attenuated by captopril (100%) or losartan (74%), but neither agent blunted the accumulation of alveolar macrophages evoked by amiodarone (5.3‐fold at 6 months). Lung neutrophil content was unchanged by amiodarone treatment for three weeks or six months. These results indicate that amiodarone induces alveolar epithelial cell apoptosis in vivo that is inhibitable by angiotensin antagonists. They also support the hypothesis that blockade of angiotensin formation or function attenuates amiodarone‐induced lung fibrosis irrespective of the severity of alveolitis.