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1
2018 - 06 - 14
2018年6月13日讯 /生物谷BIOON/ --阿尔茨海默氏症(AD)一直是新药研发的重灾区,该领域研发失败率高达99.6%。过去几年,包括礼来、阿斯利康、强生、辉瑞、罗氏在内的制药巨头投资达数十亿美元之巨的多个单抗药物均在III期临床惨遭失败,为该领域的投资前景蒙上了厚厚的阴云。之后,另一个很有前途的新药类别——BACE抑制剂,成功取代抗体药物站在了AD研发的舞台中央。然而,BACE抑制剂似乎也不大可能打破魔咒,正在追随着单抗药物的步伐。去年情人节当天,BACE抑制剂领域的领头羊——默沙东宣布终止verubecestat治疗轻至中度AD的大型III期研究EPOCH(protocol 017);今年情人节前一天,默沙东再次宣布终止verubecestat治疗前驱期AD的大型III期研究APECS(protocol 019)。这也意味着,verubecestat治疗AD的III期临床项目已完全终止。而2次公告时间均选在情人节,特别耐人寻味,默沙东似乎在述说着心中的苦楚和不舍,而这一点,一大票巨头们都深有感触:AD,AD,想说爱你,真的不易o(╥﹏╥)o!就在昨天,礼来和阿斯利康哥俩,手牵手沿着BACE国道,哭喊着朝默沙东奔去,原因竟然是——————————他们的BACE抑制剂也O-O-O-O-OVER了!!!根据公告,双方将终止lanabecestat的全球III期项目,包括lan...
2
2019 - 03 - 29
空气污染有关众所周知,污浊的空气对身体有害,每年在全球范围内造成数百万人死亡。这使空气污染成为比吸烟更厉害的杀手。然而,空气污染对人类大脑也有害吗?一项研究发现,在英国污染最严重地区,青少年的精神疾病问题(包括幻觉)更加常见。相关成果日前发表于《美国医学会杂志—精神病学》。然而,这种关联并非意味着吸入污浊空气会使青少年患上精神疾病,因为可能还有其他解释。该研究作者之一、伦敦国王学院的 Helen Fisher 表示,这项研究未显示出因果关系。Fisher 和同事发现,在 2000 名 18 岁青少年中,30% 的人报告称其在青少年时期至少有过一次精神疾病经历——其他针对年轻人的研究也报告了类似数字。然而研究发现,当把这些青少年的住址与空气污染情况作对照时,那些生活在污染程度较高地区的青少年更有可能有精神疾病史。在氮氧化物(由柴油车产生的污染物)含量最高的地区,每 20 名青少年中就有 12 名报告患有精神疾病;而在空气较清洁地区,降至每 20 人中有 7 人患病。目前尚不清楚空气污染与精神疾病存在何种关联。该团队提出的一种推测性机制是,污染物累积会直接影响大脑。研究表明,空气污染与额叶皮层和嗅球的炎症和退化有关,其中嗅球是大脑中负责嗅觉的部分。而大脑炎症已被证实与精神疾病有关。一个更简单的解释可能是,不是污染空气本身,而是汽车排放的噪音污染带来了问题。噪音污染会增加压力、扰乱睡眠,...
3
2019 - 08 - 01
第二看台老年性黄斑变性(AMD)、视网膜色素变性(RP)等视网膜变性疾病是目前尚无有效治疗手段的凶险致盲性眼病,也是公认的 “视力杀手”。由中南大学爱尔眼科学院院长唐仕波教授、爱尔眼科研究所副所长陈建苏教授带领团队,利用诱导多能干细胞(iPS)条件培养基和飞秒角膜透镜,联合构建高活性视网膜色素上皮细胞(RPE)的研究,不但有利于对视网膜色素上皮细胞生理特性、药物筛选等研究,还有利于构建组织工程视网膜层及其移植。这将帮助科学家开发出应用组织工程 RPE 细胞片治疗视网膜变性疾病和光感受器病变的新方法。培养高活性的视网膜细胞与年龄相关的老年性黄斑变性是发达国家 50 岁以上人群视力损害和致盲的首要病因,多达 90% 的病人无法治愈。数据显示,发达国家年龄 50 岁以上黄斑变性的发病率达 11%,目前我国的发病率接近发达国家,患病人数超过 3000 万人,并以每年 30 万人次的速度增加,成为我国现阶段 50 岁以上年龄群体发病率最高的三大眼科疾病之一,而且女性呈现出比男性更高的危险性。研究发现,未来最有希望治疗老年性黄斑变性的方式是视网膜色素上皮细胞疗法、视网膜黄斑部分的移植。那么,要采用 RPE 疗法,就需要先培养健康的视网膜细胞。陈建苏告诉科技日报记者,取出死亡时间在 3 小时内捐献者的带有部分脉络膜的视网膜组织,在解剖显微镜下可将带有部分脉络膜的 RPE 层从捐赠组织中分离出来,...
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产品名称: K3 Plus酶标仪
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时间: 2019 - 05 - 23
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时间: 2019 - 04 - 22
描述The LIVE/DEAD™ Fixable Green Dead Cell Stain Kit is used to determine the viability of cells prior to the fixation and permeabilization required for intracellular antibody staining or prior to elimination of biohazardous materials using formaldehyde fixation. This kit has been optimized and validated for use with a blue laser flow cytometer.• Stable—dyes are freeze dried in separate vials to maintain stability• Robust—staining pattern is the same before and after fixation• Bright signal—allows...
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时间: 2019 - 04 - 18
描述This product detects the externalization of phosphatidylserine in apoptotic cells using recombinant annexin V conjugated to green-fluorescent FITC dye and dead cells using propidium iodide (PI). Propidium iodide stains necrotic cells with red fluorescence. After treatment with both probes, apoptotic cells show green fluorescence, dead cells show red and green fluorescence, and live cells show little or no fluorescence.
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时间: 2019 - 04 - 18
描述SYTOX® Green nucleic acid stain is an excellent green-fluorescent nuclear and chromosome counterstain that is impermeant to live cells, making it a useful indicator of dead cells within a population.•  Impermeant to live cells•  Excitation/Emission: 504/523 nm•  Use with 488 Argon-ion laser•  Works with mammalian cells and both Gram-positive and Gram-negative bacteriaSimple Viability Determination SYTOX® Green allows quick determination of cell viability when usin...
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时间: 2019 - 04 - 18
描述Premo™ FUCCI Cell Cycle Sensor is a fluorescent, two-color sensor of cell cycle progression and division in live cells. It allows accurate and sensitive cell cycle analysis of individual cells or a population of cells by fluorescence microscopy, flow cytometry, or high-content imaging.At 2 x 200 µL, this is a smaller pack size version (1/5 volume) of the popular full-size product and perfect for testing its performance in your system.The Premo™ FUCCI Cell Cycle Sensor is delivered by high...
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时间: 2019 - 04 - 18
描述CountBright™ absolute counting beads are a calibrated suspension of microspheres that are brightly fluorescent across a wide range of excitation and emission wavelengths (UV to 635 nm excitation and 385-800 nm emission). CountBright™ absolute counting beads are mixed with the cell sample and assayed via flow cytometry. By comparing the ratio of bead events to cell events, absolute numbers of cells in the sample can be calculated. Because CountBright™ beads are mixed in the test sample, absolut...
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时间: 2019 - 04 - 17
描述CellTrace™ CFSE Cell Proliferation Kit is used for in vitro and in vivo labeling of cells to trace multiple generations using dye dilution by flow cytometry.• Superior performance—bright, single-peak staining enables visualization of multiple generations• Long-term signal stability—well-retained in cells for several days post stain• Non-toxic—staining does not adversely effect cell health• Simple, robust staining protocolView a selection guide for all CellTrace™ Cell Proliferation Kits fo...
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时间: 2019 - 04 - 17
描述CellTrace™ CFSE 细胞增殖试剂盒 (CellTrace™ CFSE Cell Proliferation Kit) 以方便的一次性瓶装形式提供用途广泛,稳定性高的细胞示踪剂。 羧基荧光素二醋酸盐琥珀酰亚胺酯,常称为 CFSE,可被动扩散进入细胞。 这种试剂没有颜色和荧光,直至细胞内的酯酶去除其醋酸盐基团,产生能发出明亮荧光的羧基荧光素琥珀酰亚胺酯。 琥珀酰亚胺酯与细胞内氨基反应,形成稳定且能用醛固定剂固定的荧光偶联物。 此试剂盒包含十份一次性瓶装的 CFSE,因此进行小规模实验时无需制备过量的易变质 CFSE 储存液。 此试剂盒还包括高质量的 DMSO(二甲基亚砜)和详细的实验方案。For Research Use Only. Not for use in diagnostic procedures.图表Suppressive capacity of isolated Treg cells.Suppressive capacity of isolated Treg cells. (A) CD4+ CD25–cells were stained with Ca...
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时间: 2019 - 04 - 17
描述The Click-iT® EdU Pacific Blue™ Flow Cytometry Assay Kit provides a simplified, more robust assay for analyzing DNA replication in proliferating cells as compared to traditional BrdU methods. Newly synthesized DNA is analyzed using the 405 nm laser of the flow cytometer.• Accurate—superior results compared to BrdU assays• Fast—results in as little as 90 minutes• Economical—more assays per kitView selection guide for all Click-iT™ EdU and Click-iT™ Plus EdU assays for flow c...
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时间: 2019 - 04 - 17
描述The 2018 Attune NxT Acoustic Focusing Cytometer has expanded functionalities to drive your research forward. Designed and developed to remove common barriers associated with flow cytometry, the evolutionary capabilities of the Attune NxT flow cytometer offer adaptable optical configuration options so you can get the most out of your multicolor analysis.• Free Attune NxT software with researcher-inspired upgrades• New green laser option for expanded utility and fluorochrome options• Simple push...
型号:
时间: 2019 - 04 - 17
描述The 2018 Attune NxT Acoustic Focusing Cytometer has expanded functionalities to drive your research forward. Designed and developed to remove common barriers associated with flow cytometry, the evolutionary capabilities of the Attune NxT flow cytometer offer adaptable optical configuration options so you can get the most out of your multicolor analysis.• Free Attune NxT software with researcher-inspired upgrades• New green laser option for expanded utility and fluorochrome options• Simple push...
型号:
时间: 2019 - 04 - 17
描述The 2018 Attune NxT Acoustic Focusing Cytometer has expanded functionalities to drive your research forward. Designed and developed to remove common barriers associated with flow cytometry, the evolutionary capabilities of the Attune NxT flow cytometer offer adaptable optical configuration options so you can get the most out of your multicolor analysis.• Free Attune NxT software with researcher-inspired upgrades• New green laser option for expanded utility and fluorochrome options• Simple push...
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