通过胚胎发育通过组织水平软生物电子的脑植入
bioRxiv : the preprint server for biology
|June 10, 2024
概括
研究人员开发了一种灵活,薄的电极阵列,可以与发育中的大脑集成. 这项技术允许在整个发育过程中,在单细胞水平上稳定地对神经活动进行大脑范围的跟踪.
科学领域:
- 神经科学是一个神经科学.
- 生物电子学 生物电子学
- 发展生物学 发展生物学
背景情况:
- 研究发育中的大脑需要高分辨率跟踪神经活动.
- 大脑发育过程中的动态3D结构变化挑战了现有的生物电子工具.
- 了解神经发育障碍需要从早期监测神经动态.
研究的目的:
- 开发一种新的生物电子设备,用于在脊椎动物大脑发育过程中稳定,大脑范围内的神经活动跟踪.
- 克服当前技术在适应大脑在发育过程中的形态变化的局限性.
- 在神经发育过程中实现毫秒分辨率的单细胞电图绘制.
主要方法:
- 制造一个组织层面软的,微米以下厚度的,可伸缩的网状微电极阵列.
- 将阵列集成到胚胎脊椎动物神经板中,利用自然的2D到3D组织重构.
- 利用器官生成驱动的扩张和折叠来分布在整个发育中的大脑中.
- 通过免疫染色,基因表达分析和行为测试来评估设备的生物相容性.
主要成果:
- 可伸缩网状电极阵列成功地集成到3D大脑结构中,而不妨碍发育或功能.
- 该设备实现了长期,稳定的,大脑范围的电图绘制,具有单个单元,单个尖峰分辨率.
- 该技术有助于观察大脑发育过程中出现的神经电活动和人口动态.
结论:
- 一种新的生物电子设备允许在整个大脑发育过程中对神经活动进行前所未有的稳定监测.
- 这项技术为研究神经发生的基本过程和神经发育障碍的起源提供了一个强大的工具.
- 这些发现为了解大脑进化和从细胞到系统水平的功能开辟了新的途径.
相关概念视频
Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
Cleavage and Blastulation
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
Zygotic Development And Stem Cell Formation
The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...


