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诊断类风湿关节炎有了新标志物
诊断类风湿关节炎有了新标志物
2020 - 05 - 08
最近，《自然—通讯》刊发了一篇针对类风湿关节炎（RA）致病和标志分子的研究。该文章来自北京大学人民医院风湿免疫研究所栗占国课题组，作者发现，RA患者的sSR-A水平显着升高，与该疾病的临床症状和免疫状况指标直接相关。结果表明sSR-A是RA诊断的新型生物标志物，尤其可用于血清阴性及早期RA的诊断，而靶向sSR-A可能是一种新的治疗策略。《中国科学报》了解到，RA是一种常见的自身免疫病，具有高致残性。全球有3000多万患者，该病以破坏性关节炎及自身免疫异常为主要特征。目前，RA的血清诊断主要依据类风湿因子和抗CCP的检测。但是，仍有大量患者在发病初期，甚至患病多年而缺乏生物标志物，给临床诊断和治疗带来困难，导致延误治疗而出现残疾。早期诊断对于改善RA的结局至关重要。但是，目前的诊断工具对早期患者敏感性有限，致使大量的患者因延误诊断，不能得以正确治疗，出现残疾。鉴于此，该研究团队联合浙江大学、南方医科大学和包头医学院的研究者展开了一项大规模的多中心研究，涉及3262名参与者的训练队列和验证队列，最终发现sSR-A是RA的致病分子，可促进炎性T细胞和致炎因子产生。并且，该课题组利用基因敲除的sSR-A-/-模型研究证明，sSR-A可以促进关节炎的发病以及病情的加重，靶向抑制sSR-A可以缓解关节炎的症状。研究者进一步证实，sSR-A蛋白可以促进胶原诱导性关节炎发病，加速病情进展，加重疾病...
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干细胞治疗致盲性眼病有了新希望
干细胞治疗致盲性眼病有了新希望
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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国家药监局：生产销售假劣疫苗要重罚
国家药监局：生产销售假劣疫苗要重罚
2019 - 07 - 26
科技日报北京 7 月 30 日电 （记者付丽丽）“建立严格的法律责任制度，对违反《疫苗管理法》规定构成犯罪的，依法从重追究刑事责任，货款不足 50 万元的按 50 万元计算。”30 日，在国家药监局主办的 “《疫苗管理法》颁布法规解读宣贯研讨会上”，该局政策法规司副司长吴丽雅说。《疫苗管理法》是全球首部综合性疫苗管理法律。具体来讲，吴丽雅介绍，生产、销售的疫苗属于假药的，没收违法所得和违法生产、销售的疫苗以及专门用于违法生产疫苗的原料、辅料、包装材料、设备等物品，责令停产停业整顿，吊销药品注册证书，直至吊销药品生产许可证等，并处违法生产、销售疫苗货值金额 15 倍以上 50 倍以下的罚款。生产、销售的疫苗属于劣药的，处违法生产、销售疫苗货款金额 10 倍以上 30 倍以下罚款。吴丽雅为读者算了一笔账。生产、销售的疫苗属于假药的，最低罚款：50 万元 ×（15 倍至 50 倍）=750 万元至 2500 万元；生产、销售的疫苗属于劣药的，最低罚款: 50 万元 ×（10 倍至 30 倍）=500 万元至 1500 万元。疫苗是特殊的药品，事关公共安全。吴丽雅表示，长春长生问题疫苗事件暴露出我国在疫苗监管方面存在主体责任不落实、质量安全管理不到位、职业化专业化监管力量薄弱等问题。鉴于此，《疫苗管理法》明确提出国家对疫苗实行最严格的管理制度，对疫苗的研制、生产、流通、...
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LIVE/DEAD™ Fixable Green Dead Cell Stain Kit, for 488 nm excitation
产品名称： LIVE/DEAD™ Fixable Green Dead Cell Stain Kit, for 488 nm excitation
型号：
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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Dead Cell Apoptosis Kit with Annexin V FITC and PI, for flow cytometry
产品名称： Dead Cell Apoptosis Kit with Annexin V FITC and PI, for flow cytometry
型号：
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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SYTOX™ Green Nucleic Acid Stain - 5 mM Solution in DMSO
产品名称： SYTOX™ Green Nucleic Acid Stain - 5 mM Solution in DMSO
型号：
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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Premo™ FUCCI Cell Cycle Sensor (BacMam 2.0)
产品名称： Premo™ FUCCI Cell Cycle Sensor (BacMam 2.0)
型号：
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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CountBright™ Absolute Counting Beads, for flow cytometry
产品名称： CountBright™ Absolute Counting Beads, for flow cytometry
型号：
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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CellTrace™ CFSE Cell Proliferation Kit, for flow cytometry
产品名称： CellTrace™ CFSE Cell Proliferation Kit, for flow cytometry
型号：
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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CellTrace™ CFSE Cell Proliferation Kit - For Flow Cytometry
产品名称： CellTrace™ CFSE Cell Proliferation Kit - For Flow Cytometry
型号：
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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Click-iT™ EdU Pacific Blue™ Flow Cytometry Assay Kit
产品名称： Click-iT™ EdU Pacific Blue™ Flow Cytometry Assay Kit
型号：
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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Attune™ NxT Acoustic Focusing Cytometer, blue
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue
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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Attune™ NxT Acoustic Focusing Cytometer, blue/red
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue/red
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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Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet
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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Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet/yellow
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet/yellow
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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