Interleukin-6 and selected plasma proteins in healthy persons of different ages

In the present study, interleukin-6(IL-6) and several acute phase proteins were measured in healthy participants (23–87 years of age). A linear correlation between IL-6 and age was established with an increase of 0.016 pg/ml(00.004) per year of life. Whereas CRP remained below 0.5 mg/dl in all participants, an increase with age for fibrinogen and an inverse relation for albumin as well as transferrin were obtained. However, the increase of IL-6 did not correlate with any of these changes. IL-6 associated diseases may therefore occur more often with advancing age, but in healthy participants IL-6 does not explain the changing plasma protein pattern resembling that of an acute phase reaction.     

111例急性T淋巴细胞白血病免疫表型分析

选用一组抗人白细胞表面分化抗原单克隆抗体和基因探针,依靠间接免疫荧光技术、Ap-AAP桥联酶标免疫组化染色和分子杂交手段.对111例急性T淋巴细胞白血病(T-ALL)进行了免疫分型研究。本研究所观察到的T-ALL细胞表型绝大多数反映着正常胸腺细胞分化发育阶段或某些少见类型细胞的表型特征,亦有少数病例则无正常淋巴细胞相对应的表型,表明T-ALL细胞的高度异质性。对T-ALL表型的研究为今后深入探讨胸腺内淋巴细胞的分化成熟以及T-ALL发生学提供了良好的研究模式。     

一种测量视网膜锥体闪烁光ERG的改良方法：闪烁指数分析法

闪烁光ＥＲＧ是反映视网膜锥体活动的客观指标。但在诸如视网膜色素变性等一些视锥功能处于高度受累的疾病，反应波形呈现非窦状，使用以往在分析中采用的峰－峰值测量法，则不能有效地反应出波形所代表的真切含义。本文根据病理状态下闪烁光反应的波形特点，特此提出一项测量闪烁光ＥＲＧ振幅的改良方法，即闪烁指数（ｆｌｉｃｋｅｒｉｎｄｅｘｔ．ＦＩ）分析法，并通过数学方法推导出一项闪烁指数测量公式以代替方格卡尺测量法。应用本法已在实践中获得良好的验证，从而认为应用此项方法可以准确、客观、迅速地测量得锥体闪烁光的反应状态，特别是在对锥体功能呈病理状态的一些视网膜疾病的观测。通过计算机程序化处理，ＦＩ分析法可为临床视觉电生理研究提供一种有效的手段。     

Caspase inhibitor Z-VAD-FMK potentiates heat shock-induced apoptosis and HSP70 synthesis in macrophages

Caspase inhibitor Z-VAD-FMK potentiated heat shock-induced apoptosis in macrophages. Z-VAD-FMK did not activate HSP70 synthesis, but significantly increased the intensity of this process during heat shock. It cannot be excluded that caspases abolish HSP70 accumulation under these conditions. The HSP70 synthesis inhibitor quercetin potentiated DNA fragmentation in macrophages cocultured with Z-VAD-FMK after heat shock. HSP70 play an important role in the protection of macrophages from caspase-independent apoptosis.Translated from Byulleten Eksperimentalnoi Biologii i Meditsiny, Vol. 138, No. 9, pp. 261–263, September, 2004     

Effect of Locus Coeruleus Stimulation on Ocular Hypertension and Pathology of Pulmonary Surfactant during Chronic Emotional Stress

In chronic experiments on rabbits and rats, parameters of eye homeostasis (intraocular pressure and ocular hydrodynamics) and lungs (water balance and surface-active properties of surfactant) were studied during electrical stimulation of the locus coeruleus against the background of chronic stress induced in rabbits by repeated electrical stimulation of the ventromedial nucleus and in rats by daily immobilization on a platform. Stimulation of the locus coeruleus eliminated ocular hypertension of hypothalamic origin and stress-induced disturbances in surface activity, blood volume, and water balance in the lungs.     

Effect of Semax peptide on survival of cultured rat pheochromocytoma cells during oxidative stress

We studied the effects of Semax (antiinsulin peptide with neuroprotective effect) on the survival of cultured rat pheochromocytoma cell after oxidative stress induced by short-term incubation with hydrogen peroxide. Studies with fluorescent dyes propidium iodide and Hoechst 33258 showed that cell incubation with hydrogen peroxide led to the formation of damaged cells with characteristic signs of necrosis. Semax dose-dependently reduced the number of cells damaged by oxidative stress. The efficiency of Semax depended on the time of its addition to the culture medium. The results suggest that the neuroprotective effect of Semax in ischemic stroke can be due to its capacity to protect neurons from damage caused by oxidative stress.     

TL1A:一个新的TNF家族成员

TL1A是肿瘤坏死因子超家族的一个新亚群。通过与受体DR3和DcR3/TR6的结合,既可诱导细胞凋亡,也能活化NF-ΚB。在淋巴细胞、单核细胞/巨噬细胞的活化和增殖,炎症反应的调节、机体的免疫应答以及动脉粥样硬化、炎症性肠病等疾病的发生、发展中起重要作用。