EB病毒VCA-IgA抗体水平与鼻咽癌病人远期疗效关系

目的：分析ＥＢ病毒血清学ＶＣＡ－ＩｇＡ抗体与鼻咽癌病人远期疗效关系，为临床治疗提供参考依据。方法：１９８５年本院病理确诊的５２２例鼻咽癌病人，按治疗前、后ＶＣＡ－ＩｇＡ抗体滴度分为三组：低滴度组（１：５～１：２０）、中滴度组（１：４０～１：８０）和高滴度组（１：１６０以上），随访１０年，比较生存率的异同。结果：治疗前鼻咽癌病人高滴度组１０年生存率低于低滴度组（Ｐ＜０．０５），但和中滴度组差别无显著性（Ｐ＞０．０５）。治疗后三组病人１０年生存率比较，高、中滴度二组差别无显著性（Ｐ＞０．０５），但低于低滴度组。结论：ＥＢ病毒ＶＣＡ－ＩｇＡ抗体水平可以作为估计预后的重要参考依据，与远期疗效有密切关系。     

补肾调肝敛乳方对泌乳素分泌影响的动物实验研究

利用体外垂体组织培养技术及灭吐灵诱导ＨＰＲＬ小鼠模型，以溴隐亭为对照，观察敛方的作用。结果：剑乳方不仅可以抑制离体垂体ＰＲＬ的分泌，还可拮抗灭吐灵导致的小鼠血清ＰＲＬ升高、子宫减重、受孕率下性周期紊乱，上述作用与溴隐亭相似，敛乳方还可促使示成熟雌鼠阴道上皮细胞角化。     

半叶马尾藻化学成分的研究Ⅰ

 目的：对马尾藻科植物半叶马尾藻［Sargassum hemiphyllum(Turn.) Ag.］藻体的甾醇类成分进行研究。方法：利用真空液相层析、Sephadex LH-20层析和反复硅胶柱层析进行分离，根据甾醇的理化性质和光谱数据鉴定其结构。结果：得到5个甾醇类化合物，分别确定为岩藻甾醇(SPⅠ)、24 氢过氧基 24-乙烯基胆固醇(SPⅡ)，(22E，24S)24-甲基-5α胆甾7，22二烯3β，5，6β三醇(SAⅢ)，saringosterol (SPⅣ)和麦角甾醇过氧化物(ergosterol peroxide) (SAⅥ)。结论：SPⅡ，SAⅢ和SAⅥ为首次从褐藻类中发现。     

计算机技术在中药现代化进程中的作用

中药研究手段的现代化是中药现代化最重要的组成部分。现代多学科的不断相互交叉渗透，特别是本世纪出现的计算机技术和近年发展的各种多媒体技术等，给建立新的研究方法和手段带来了良好的机遇。利用计算机自动控制和图像分析处理技术结合摄影、跟踪扫描、显微成像等先进手段，从动物的整体行为到细胞水平进行药理实验的实时监测处理和图像分析正成为国际药学界的主导方向。各种HPLC、核磁共振仪等化学分析分离技术已广泛采用了计算机技术。近年来发展的计算机药物辅助设计系统、学习记忆、自主活动等行为学计算机监控系统也开始用于药学…     

ANALYSIS ON THE THERAPEUTIC EFFECT OF ULCERATIVE COLITIS TREATED WITH ELECTROACUPUNCTURE PLUS QIGONG

Ulcerativecolitisbelongstocategoryof"diarrhea"intraditionalChinesemedicine.Sincel968,theauthorhastreated113casesofulcera-tiveco1itiswhoareassignedrandomlytoEAp1usQigonggroup(treatmentgroup),andcontro1group(traditionalacupuncturegroupandsimpleQigonggroup)f…     

Anti -addiction effects of agmatine against heroin self-administration in rats

Rationale： Drug abuse is serious and costly health problems. Present understanding that drug addiction is a chronic brain disease paves the way for pharmacotherapy. Unfortunately, few medications have proven effective for the treatment of addiction and dependence. Searching novel strategies of pharmacotherapy against drug addiction are challenging. Agmatine （ decarboxylated L - arginine）, an endogenous imidazoline receptor ligand, with multiple pharmacological profiles including its NMDA antagonistic properties, attracts the attention for its potential therapeutic efficacy for drug addiction.     

Acetylcholine Transmission in Nucleus Accumbens and VTA on Heroin- Seeking Elicited by Contextual and Conditioned Cues

The involvement of cholinergic transmission in heroin self - administration and the reinstatement of heroin - seeking was examined in rats trained to nose - poke for intravenous heroin. Systemic treatment with physostigmine modestly reduced the acquisition and rate of heroin self-administration. Following 10 -14 days of self-administration, rats were left in the home environment for 14 days. Withdrawn animals were evaluated for context-induced nosepokes during the first hour after being returned to the self-administration apparatus. One hr later a conditioned stimulus （ house light, light in the nose-poke hole, sound of the infusion pump） was presented to initiate cue-induced reinstatement.     

Radiation-induced arrest of cells in G2 phase elicits hypersensitivity to DNA double-strand break inducers and an altered pattern of DNA cleavage upon re-irradiation

PURPOSE: To determine how radiation-induced arrest in G2 affects the response of mammalian cells to a challenging dose of radiation or to antitumour drugs producing DNA double-strand breaks. MATERIALS AND METHODS: V79 fibroblast survival to 5 Gy gamma-rays followed at intervals by 3 Gy irradiation or by contact with an equitoxic dose of neocarzinostatin or etoposide, was measured by clonogenic assays. The pattern of radiation-induced DNA double-strand breaks was determined by filter elution and CFGE (continuous field gel electrophoresis) or PFGE (pulsed-field gel electrophoresis) in G2-arrested cells as well as in nonpre-irradiated asynchronous or synchronized cells. The cell-cycle phase specificity of drug susceptibility was determined in synchronized HeLa cells. RESULTS: Cell kill by radiation-drug combined treatment varied markedly with the time elapsed after priming irradiation. Pre-irradiated, G2-arrested V79 fibroblasts demonstrated excess double-stranded DNA cleavage upon re-irradiation and hypersensitivity to drugs and radiation, although maximum resistance to both neocarzinostatin and etoposide in synchronized HeLa cells was in G2. This effect occurred in the megabase range only, with a peak around 4 Mbp; no change in the electrophoretic migration profile of DNA was observed below 1 Mbp. Moreover, the DNA migration profile and the yield of DNA cleavage in G2-arrested cells were close to those expected from S-phase cells. CONCLUSION: The available data suggest that mechanisms operating within the radiation-induced G2 block promote susceptibility to DNA double-strand break inducers at this stage. It is also proposed that the conformation of DNA in cells accumulated in G2 following irradiation bears resemblance to that for cells in S phase, due either to active repair mechanisms or to inhibition of chromosome disentanglement at the S-G2 transition.     

Synthesis and evaluation of 6-[(18)F]fluoro-3-(2(S)-azetidinylmethoxy)pyridine as a PET tracer for nicotinic acetylcholine receptors

Both ABT-594 ((R)-2-chloro-5-(2-azetidinylmethoxy)pyridine) and A-85380 (3-[2(S)-2-azetidinylmethoxy]pyridine), novel nicotinic agonists that possess potent non-opioid analgesic properties, have high affinity for neuronal nicotinic acetylcholine receptors (nAChR) but do not elicit the pronounced toxicity of epibatidine. 6-[(18)F]Fluoro-3-(2(S)-azetidinylmethoxy)pyridine (6-[(18)F]fluoro-A-85380), a F-18 labeled analogue of these two compounds, is therefore a promising radioligand for positron emission tomography (PET) studies in humans. The use of trimethylammonium as a leaving group in nucleophilic aromatic substitution reactions has proven to be a versatile and efficient strategy, and offers several advantages over other leaving groups. Here, we report the synthetic strategy for the preparation of a precursor, as a trimethylammonium iodide salt, and its use in the radiosynthesis to 6-[(18)F]fluoro-A-85380. Preliminary compartative PET studies of 6-[(18)F]fluoro-A-85380 and 2-[(18)F]fluoro-A-85380 were carried out in baboon to examine their suitability as tracers for studying nAChR system.