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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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相关实验视频

Updated: Jul 8, 2025

Bioinspired Soft Robot with Incorporated Microelectrodes
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通过磁性定位细菌基于微生物机器人 (BBMBR) 调节免疫激活.

Dohee Lee, Minseok Jeong, Hyeonjae Lee

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 12, 2023
    PubMed
    概括

    研究人员开发了一种基于细菌的微生物机器人系统 (BBMBR),用于向癌症免疫治疗. 这个系统精确地控制基于细菌的免疫激活剂,将冷瘤转化为热瘤,以提高治疗效率.

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    科学领域:

    • 生物技术是生物技术.
    • 免疫学 免疫学 免疫学
    • 纳米技术 纳米技术

    背景情况:

    • 了解瘤微环境对于癌症治疗,特别是免疫治疗至关重要.
    • 免疫沙漠或感冒瘤表现出下调的T细胞透,限制了治疗的有效性.
    • 将冷瘤转化为热瘤是提高免疫治疗反应的关键策略.

    研究的目的:

    • 开发一种基于细菌的微型/生物机器人系统 (BBMBR),用于时空控制免疫增强剂.
    • 研究BBMBR在将冷瘤转化为热瘤方面的潜力.
    • 在癌症治疗中建立局部免疫激活的新框架.

    主要方法:

    • 细菌用磁纳米粒子 (MNP) 进行了工程设计,以创建BBMBRs.
    • 磁场被用来控制BBMBRs的空间定位.
    • 通过量化M1-表型巨分化 (CD80染色) 和IL-6水平来评估免疫激活.

    主要成果:

    • 生物制造证实了MNP与细菌的成功连接 (75.2%±3.37%的细菌-MNP比率).
    • BBMBRs通过磁场证明了受控的旋转和转换定位.
    • 磁导BBMBR局部化诱导局部免疫激活,减少M1巨细胞分化和IL-6水平从激活点的距离增加.

    结论:

    • 开发的BBMBR系统可以精确控制免疫增强剂的局部化.
    • 这项技术使空间免疫激活策略成为可能,有可能克服治疗感冒瘤的挑战.
    • BBMBR框架为癌症免疫治疗提供了一个有希望的新范式.