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1
2018 - 07 - 20
一种非常复杂的治疗一些乳腺癌和卵巢癌的方法就是使用一类叫做PARP抑制剂的药物。PARP抑制剂旨在利用让发生某些突变的肿瘤特别致命的缺陷。然而,这种靶向癌症治疗方法有时会失败,科学家们迫切地想要知道其中的原因。 如今,在一项新的研究中,美国洛克菲勒大学的Titia de Lange教授及其团队对这种耐药性机制提供了新的认识,并且为抵抗这种耐药性提供了新的希望。他们发现了由基因BRCA1发生的错误引发的一些癌症逃避旨在杀死它们的定制药物的分子机制。这一发现也挑战了之前针对这些PARP抑制剂成功地或未能给患者带来益处的机制作出的猜测。相关研究结果于2018年7月18日在线发表在Nature期刊上,论文标题为“53BP1–RIF1–shieldin counteracts DSB resection through CST- and Polα-dependent fill-in”。图片来自Laboratory of Cell Biology and Genetics at The Rockefeller University。他们的发现有助于解释为什么某些癌症会对PARP抑制剂作出反应,而其他癌症却没有---这种认识最终可能有助于改善对患者的治疗。 缺陷和机会 专家们预测今年将有大约288000例乳腺癌和卵巢癌新确诊病例。这些癌症的很大一部分是由人类基因组中的两个最臭名昭着的基因--- ...
2
2019 - 05 - 23
2019年5月22日 讯 /生物谷BIOON/ --早稻田大学Toshio Ohshima教授的一项新研究发现,抑制塌陷反应介质蛋白2(CRMP2)(一种微管结合蛋白)的磷酸化可以抑制神经纤维的退化,促进视神经损伤后的再生。最近在《Scientific Reports》杂志上发表的这项研究结果可以为视神经病变患者开发新型治疗方法。青光眼患者视野中会出现盲点,并且当视神经恶化时可能导致失明。神经纤维的这种恶化和功能丧失也发生在创伤性神经损伤和神经系统疾病,例如阿尔茨海默病和ALS中。目前,由于轴突再生受到抑制因子的限制,因此不存在在损伤或变性后完全修复视网膜,脊髓和中枢神经系统的其他部分的方法。(图片来源:Www.pixabay.com)在过去的研究中,已经发现了抑制轴突再生的潜在机制,并且认为解决这些机制可以使科学家们在开发新的中枢神经系统损伤治疗方法方面更进一步。CRMP2蛋白质分子起到稳定微管的作用,微管在神经元细胞水平为中枢神经系统提供结构支持,并通过与微管蛋白二聚体结合促进聚合。然而,这些功能通过磷酸化(一种调节神经元蛋白的机制)被各种激酶阻止。“在我们之前的研究中,我们所做的是开发CRMP2敲入小鼠并从基因上抑制其CRMP2磷酸化,”Ohshima教授解释说。 “结果,CRMP2敲入小鼠在脊髓损伤后表现出轴突再生的促进。由此,我们假设在视神经损伤后也可以观察到相同的现象。...
3
2019 - 09 - 29
2019年8月24日讯 /生物谷BIOON /——一项新的研究表明,一种特殊的碳水化合物在调节人体血压方面发挥着重要作用。哥本哈根大学和Rigshospitalet的研究人员用老鼠做了一项新的研究证明了这一点。研究人员认为,这一发现可能对改进高血压药物具有巨大的潜力。高血压和低血压都可能对健康产生不良后果,分别导致心血管疾病和晕厥。现在,研究人员对有助于调节血压的因素有了更多的了解。这项新研究结果发表在《Journal of Biological Chemistry》杂志上。在哥本哈根大学和Rigshospitalet的跨学科合作中,博士生Lasse Holst Hansen在人类身上一种特殊的肽激素上发现了一种特定形式的碳水化合物或糖。此外,在对大鼠的实验中,研究小组发现含有这种糖的肽激素会影响血压的调节。他们希望,他们的研究结果在未来可以用于开发更好的高血压药物。图片来源:https://cn.bing.com'对于开发一种没有副作用(比如晕厥)的现代治疗高血压的方法,这可能是一个非常好的机会。人们早就知道这种肽激素对血压非常重要,但到目前为止还不能用于治疗。这一发现可能只是因为我们跨学科合作、基础和临床研究相结合的结果。'Rigshospitalet临床生物化学系Jens Peter G?tze教授说道。大约五分之一的丹麦人患有高血压。这会增加心血管疾病的风险...
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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...
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.
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...
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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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...
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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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...
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...
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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