45 research outputs found

    Behavioral performance of time processing in patients with schizophrenia and individuals with schizotypal personality features

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    目的:探讨精神分裂症患者与分裂型人格个体的时间加工行为特征。方法:选取59名符合美国精神障碍诊断与统计手册第4版(DSM-IV)精神分裂症诊断标准的门诊或住院患者,62名通过分裂型人格问卷(SPQ)筛查的分裂型人格个体以及60名健康对照人群。通过时间辨别任务、时间产生任务、时间复制任务对3组被试的时间加工能力进行测查。结果:时间产生任务中,分裂型人格组的准确性得分大于健康对照组[(1.03±0.07)vs.(0.99±0.09),P<0.05],精神分裂症组的变异系数大于健康对照组和分裂型人格组[(0.26±0.10)vs.(0.20±0.05),(0.20±0.05);均P<0.01];时间复制任务中,精神分裂症组的变异系数大于健康对照组和分裂型人格组[(0.21±0.11)vs.(0.15±0.07),(0.17±0.12);均P<0.01)。结论:精神分裂症患者和分裂型人格个体都存在时间加工表现上的缺损,其中精神分裂症患者的缺损可能更为严重。Objective: Schizophrenia is associated with time-processing impairments. However, very little is known about this type of problem in at-risk individuals with schizotypal personality disorder (SPD) features. The current study compared time-processing performance in patients with schizophrenia, individuals with SPD features, and healthy controls. Methods: A number of tasks capturing time discrimination, time production and time reproduction as well as other related abilities were administered to 59 schizophrenia patients, 62 individuals with SPD fea- tures, and 60 healthy controls. The diagnosis was made according to the Diagnostic and Statistical Manual of Mental Disorders-IV, Fourth Edition (DSM-IV) criteria. In analyzing the time-processing data, repeated measures were a- dopted, with group as a between-subjects variable, duration of time as a within-subjects variable, time threshold in time discrimination, accuracy (estimated time/standard time) and coefficient of variation (SD of estimated time/ mean of estimated time) of time production and time reproduction as dependent variables. Results: The result showed that patients with schizophrenia, SPD individuals and healthy controls had similar time discrimination threshold (P 〉 0. 05). In the time production task, SPD individuals had higher accuracy score than healthy controls [ ( 1.03 ±0. 07) vs. (0. 99± 0. 09), P 〈 0. 05 ], while patients with schizophrenia had higher coefficient of variation as compared to individuals with SPD features and healthy volunteers[(0. 26 ±0. 10) vs. (0. 20 ±0. 05), (0. 20 ± 0. 05) ; Ps 〈 0. 01]. In the time reproduction task, patients with schizophrenia also scored higher on the coefficient of variation than SPD individuals and healthy controls[ (0.21 ± 0. 11) vs. (0. 15± 0.07), (0. 17 ±0. 12); Ps 〈0. 01]. Conclusion: The current findings suggest that both SPD individuals and patients with schizophrenia may have impairments on time processing. The impairments of patients with schizophrenia may be more severe than that of SPD individuals

    Structure-Activity Relationship Study Enables the Discovery of a Novel Berberine Analogue as RXRα Activator to Inhibit Colon Cancer

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    黄连素是从黄连、黄柏等传统中药中提取的单体化合物,常用于治疗痢疾及其它消化道感染。近年来,黄连素的抗心律失常、调控能量代谢、降血糖血脂和抗癌等多重功效使其成为一个“明星”中药单体化合物。尽管黄连素具有很好的安全性,但其抗癌作用在临床应用上仍具有许多局限性,包括抗癌活性低、溶解度和生物利用度低等。然而,由于黄连素的分子靶点不清楚,以往对黄连素的改造比较盲目和随机,并未取得较好的进展。胡天惠团队与张延东团队紧密合作、优势互补,针对黄连素与RXR的结合模式,运用结构生物学方法和全合成相结合,设计合成了多种黄连素衍生物,并开展了构效关系分析。发现黄连素衍生物B-12在结合并激活RXR、抗肠癌活性、溶解度和生物利用度方面均明显优于黄连素,且保留了黄连素的肿瘤选择性和低毒副作用,具有很好的临床转化前景。该研究也为结构生物学指导黄连素衍生物药物设计提供了理论基础。本论文的通讯作者为医学院占艳艳副教授、张延东教授和胡天惠教授。医学院博士生徐贝贝和化学化工学院博士生江训金为共同第一作者。We reported recently that berberine, a traditional oriental medicine to treat gastroenteritis, binds and activates Retinoid X receptor α (RXRα) to suppress the growth of colon cancer cells. Here, we extended our studies based on the binding mode of berberine with RXRα by design, synthesis and biological evaluation of a focused library of 15 novel berberine analogues. Among them, 3,9-dimethoxy-5,6-dihydroisoquinolino[3,2-a]isoquinolin-7-ium chloride (B-12) was identified as the optimal RXRα activator. More efficiently than berberine, B-12 bound and altered the conformation of RXRα/LBD, thereby suppressing Wnt/β-catenin pathway and colon cancer cell growth via RXRα mediation. In addition, B-12 not only preserved berberine’s tumor selectivity but also greatly improved its bioavailability. Remarkably, in mice, B-12 did not show obvious side effects including hypertriglyceridemia as other RXRα agonists, or induce hepatorenal toxicity. Together, our study describes an approach for the rational design of berberine-derived RXRα activators as novel effective antineoplastic agents for colon cancer.This work was supported by the National Natural Science Foundation of China (31770860, 21772164, 81572589, 81602560 and 21572187), and the Natural Science Foundation of Fujian Province (2018R1036-2, 2017J06020, 2019R1001-4, and 2019R1001-5). 项目得到了国家自然科学基金委促进海峡两岸科技合作联合基金重点项目、面上项目和福建省自然科学基金的支持

    Research Overview on Yao Medicine of Corydalis saxicola Bunting

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    Report on Validity and Reliability of LASS for Students in Senior Middle School

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    目的 研究 LASS(初中生版 )在高中生中使用的信度和效度。方法 应用 LASS(初中版 )和 SCL— 90对 2 36名高一和高三学生进行了施测。结果 经主成分分析得出 5个因素 ,分别命名为集体适应、自我接纳、同伴关系、学业适应和师生关系。以 SCL— 90总均分作为学生心理健康水平的指标。在高低 2组间学校生活适应量表各因子均分的比较差异均有显著性 ( t=2 .31~ 7.6 6 ,P<0 .0 5 )。各分量表的 Crobachα系数在 0 .71~ 0 .84之间 ,Spearman-Brown分半信度在 0 .73~0 .85之间。结论 经修订后的 LASS(高中版 )具有良好的结构效度和效标效果 ,各分量表的内部一致性和分半信度也符合心理测量学的要求 ,可以在高中生中试用

    阿克苏河流域水资源承载力模糊综合评价

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    阿克苏河是天山南坡水量最大的河流,是目前塔里木河最大的水量补给来源。由于阿克苏河流大规模的农业开发和不合理的水资源开发利用,不仅使得流域内生态环境脆弱,同时导致了补给干流的水资源减少,使得干流(尤其是在下游)产生了一系列的生态环境问题。本文针对阿克苏河流域水资源的实际情况,依据阿克苏河流域供需状况等,选取人均水资源可利用量,人均供水量、水资源利用率、耕地灌溉率、供水模数、需水模数、生活用水定额、生态用水率等指标,应用模糊综合评价方法综合的评价了流域内现状和不同水平年的水资源承载力,并提出了提高水资源承载力的途径

    Report on Validity and Reliability of LASS for Students in Senior Middle School

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    目的 研究 LASS(初中生版 )在高中生中使用的信度和效度。方法 应用 LASS(初中版 )和 SCL— 90对 2 36名高一和高三学生进行了施测。结果 经主成分分析得出 5个因素 ,分别命名为集体适应、自我接纳、同伴关系、学业适应和师生关系。以 SCL— 90总均分作为学生心理健康水平的指标。在高低 2组间学校生活适应量表各因子均分的比较差异均有显著性 ( t=2 .31~ 7.6 6 ,P<0 .0 5 )。各分量表的 Crobachα系数在 0 .71~ 0 .84之间 ,Spearman-Brown分半信度在 0 .73~0 .85之间。结论 经修订后的 LASS(高中版 )具有良好的结构效度和效标效果 ,各分量表的内部一致性和分半信度也符合心理测量学的要求 ,可以在高中生中试用

    基因调控系统中反馈压制的噪声: 慢转录情形

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    土壤种子库快速萌发方法

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    本发明涉及一种土壤种子库快速萌发方法,采用萌发盒的制作、土壤样品的铺置、土壤水分的补充、萌发幼苗的确认等步骤完成,该方法解决控制条件下大规模开展土壤种子库萌发的技术问题,提高了土壤种子库萌发实验的精度和科学性,具有实验效率和精度较高、萌发时间较短,易于辨认幼苗等优点,可以在不同区域进行推广和应用

    不同情境下的虚拟水战略对塔里木河流域水资源和生态环境的影响

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    本文简要的介绍了虚拟水含量的计算方法,根据2003年塔里木河流域的资料,计算了主要农产品单位质量的农产品虚拟水含量、城乡居民消费的虚拟水含量、生产产品的虚拟水含量和在不同的情境下虚拟水战略对生态环境的影响。结果表明:与西北其它地区相比较,塔里木河流域生产单位质量的农产品虚拟水含量相对较低;从塔里木河流域虚拟水消费总量看,城镇居民与农村居民的消费相差不大,分别为37.14×108m3和32.95×108m3。而对于其中一些消费产品而言,如粮食、猪肉、家禽、鲜蛋、糕点和鱼虾等的消费在城镇居民与农村居民间仍然存在着一定的差异;全社会消费的虚拟水数量和实际生产产品中的虚拟水含量分别为70.09×108m3和219.63×108m3,可以看出在塔里木河流域实际生产产品的虚拟水含量远远大于各项消费的总虚拟水含量;在塔里木河流域实施虚拟水战略可以缓解社会经济和生态的压力,若通过虚拟水战略,将节约的水资源用于恢复天然植被,则可以局部的逆转塔里木河流域的生态环境
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