School of Medicine, University of Zagreb, 10000 Zagreb, Croatia.
Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia.
Biomolecules. 2024 Jan 28;14(2):156. doi: 10.3390/biom14020156.
The purpose of this review is to succinctly examine the methodologies used in lipid raft research in the brain and to highlight the drawbacks of some investigative approaches. Lipid rafts are biochemically and biophysically different from the bulk membrane. A specific lipid environment within membrane domains provides a harbor for distinct raftophilic proteins, all of which in concert create a specialized platform orchestrating various cellular processes. Studying lipid rafts has proved to be arduous due to their elusive nature, mobility, and constant dynamic reorganization to meet the cellular needs. Studying neuronal lipid rafts is particularly cumbersome due to the immensely complex regional molecular architecture of the central nervous system. Biochemical fractionation, performed with or without detergents, is still the most widely used method to isolate lipid rafts. However, the differences in solubilization when various detergents are used has exposed a dire need to find more reliable methods to study particular rafts. Biochemical methods need to be complemented with other approaches such as live-cell microscopy, imaging mass spectrometry, and the development of specific non-invasive fluorescent probes to obtain a more complete image of raft dynamics and to study the spatio-temporal expression of rafts in live cells.
本次综述旨在简要考察大脑中脂筏研究中使用的方法，并强调一些研究方法的缺点。脂筏在生化和生物物理上与大部分膜不同。膜域中特定的脂质环境为独特的亲脂筏蛋白提供了停泊点，所有这些蛋白共同构成了一个专门的平台，协调各种细胞过程。由于脂筏的隐匿性质、流动性和不断的动态重组以满足细胞的需求，因此研究脂筏一直很困难。由于中枢神经系统具有极其复杂的区域分子结构，因此研究神经元脂筏尤其麻烦。用或不用去污剂进行生化分级分离仍然是分离脂筏最广泛使用的方法。然而，当使用各种去污剂时，在溶解方面的差异暴露了一个迫切需要寻找更可靠的方法来研究特定脂筏的需求。生化方法需要辅以其他方法，如活细胞显微镜、成像质谱法和特定非侵入性荧光探针的开发，以获得对脂筏动力学更完整的图像，并研究活细胞中脂筏的时空表达。
