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新方法使科学家们能够以前所未有的细节观察细胞的分泌情况_我的网站

A |     Dhurandhar has become one of the most talked-about films of 2025. As much as the actors, the credit for its success goes to the crew. The costumes, makeup and more were done with detailed precision. Every scar, every gash, every smear of blood had to feel startlingly real. It demanded hours of intricate prosthetic work and on-set precision. From open wounds built layer by layer, to sweat, dust, tanning and climate-worn textures, the film’s visual violence was crafted with obsessive detail. HMU and Prosthetics Head Preetisheel opened up about the same.          She shared, "Working on this film was a really special experience because I got to transform so many different actors into such powerful characters. Be it Hamza, Iqbal, SP Aslam, Sanyal or Rehman, each character was played by such strong actors that it was a challenge to give them looks that were different from each other yet belonging to the same world. Every character whether their role was big or small had a clear backstory, and that made the process much more meaningful."The ensemble of the film was led by Ranveer Singh, Akshaye Khanna, Sanjay Dutt, R. Madhavan and Arjun Rampal. Preetisheel explained that the script demanded a visual universe where every character’s appearance felt rooted in the same soil but still distinct enough to instantly communicate personality.She further added, "I put a lot of thought into even the secondary and tertiary character as well because they each had their own quirks and unique traits. Showing their rawness through makeup was important to me. Adding detailed layers and textures helped bring out who they really were, making even the briefest appearances feel real and lived-in. Hair became a key storytelling tool, evolving across the film to show time, pressure, and emotional shifts. Even little elements like scars, tanning, sweat, and dust were added with purpose and matched meticulously for continuity. And the blood work and prosthetics took things to another level; some of it is genuinely stomach-churning."          Opening up about the story of every character, she added, "Creating those visceral injuries and killings added a brutal honesty to the film that I’m really proud of. It felt like I was helping tell each character’s story in the best way I could. None of which would be possible without my amazing team that stood by me and worked hard all throughout the film to bring my vision to life."     Also Read: Deepika Padukone and Ranveer Singh’s exchange over Ranveer’s Madame Tussauds statues wins hearts。    由麦凯尔维工程学院机械工程和材料科学的Lilyan & E. Lisle Hughes教授Srikanth Singamaneni和Singamaneni实验室的前博士后Anushree Seth领导的研究人员开发了FluoroDOT测定法。该研究最近发表在《细胞报告方法》上。这种高度敏感的检测方法能够在大约30分钟内看到并测量单个细胞分泌的蛋白质。树突状细胞在不同时间点分泌蛋白1（TNFa，红色显示）和蛋白2（IL-6，黄色显示）的FluoroDOT检测图像（从左到右。

B | 未受刺激、受刺激30分钟、1小时、2小时和3小时）。细胞的细胞核以蓝色显示。白色箭头突出显示了只分泌一种蛋白质或两种蛋白质的不同数量和不同时间点的细胞。图像: Srikanth Singamaneni/华盛顿大学与来自其他大学和华盛顿大学医学院的科学家一起发现FluoroDOT检测法用途广泛，价格低廉，可适应任何实验室环境，并且有可能比目前常用的检测法更全面地了解这些蛋白质。生物医学研究人员通过分泌蛋白来了解细胞间通讯、细胞信号传导、激活和炎症等方面的信息，但目前的方法在敏感性方面受到限制，而且可能需要24小时的繁琐处理流程。质子-荧光是Singamaneni实验室创造的一种质子增强的纳米标签，比传统的荧光标签亮16000倍，信噪比超过30倍，这是FluoroDOT检测法与其他检测法的区别所在。Singamaneni说："质子-荧光剂是由金属纳米粒子组成的，它作为天线拉入光线并增强分子荧光团的荧光发射，从而使它成为一种超亮的纳米粒子。"这种质子-荧光的超亮发射使用户能够看到极少量的分泌蛋白，这是他们在现有测定法中无法做到的，加上利用定制的算法，用每个簇或斑点的颗粒数量或点状图案，实现以数字方式测量高分辨率信号。此外，它不需要特殊设备。Singamaneni和他的合作者于2020年在《自然-生物医学工程》杂志上首次发表了他们的等离子体氟化物工作。这项正在申请专利的质子荧光技术由圣路易斯华盛顿大学技术管理办公室授权给Auragent生物科学有限公司。"使用一个简单的荧光显微镜，我们能够同时对一个细胞以及它周围分泌的蛋白质的空间分布进行成像，"Seth说，他作为Singamaneni实验室的博士后学者从事这个项目，并作为Auragent生物科学公司的首席科学家（细胞应用）继续从事这项工作。"我们看到不同细胞类型的有趣分泌模式。这种检测方法还能同时观察来自单个细胞的两种类型的蛋白质。当多个细胞受到相同的刺激时，我们可以将同时分泌两种蛋白质的细胞与只分泌一种蛋白质或根本不分泌的细胞区分开来。"为了验证这项技术，该团队使用了从人类和小鼠细胞中分泌的蛋白质，包括感染了结核分枝杆菌的免疫细胞。合作者和共同作者之一，医学博士Jennifer A. Philips，医学和分子微生物学系的Theodore和Bertha Bryan教授，以及医学院传染病科的共同主任，已经在她的实验室中使用了FluoroDOT测定。

C | Philips举例说："当结核分枝杆菌感染免疫细胞时，这些细胞通过分泌重要的免疫蛋白（称为细胞因子）做出反应。但不是所有的细胞都以同样的方式对感染做出反应。

D | FluoroDOT测定使我们能够看到群体中的单个细胞如何对感染做出反应--看到哪些细胞正在分泌以及朝哪个方向分泌。这在旧技术中是不可能的。

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Published on:11:14:56