从简单真核生物到复杂真核生物的微自噬
Microlipophagy from Simple to Complex Eukaryotes.
作者信息
Kumar Ravinder, Arrowood Colin, Schott Micah B, Nazarko Taras Y
机构信息
Department of Clinical Pharmacy and Translational Science, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
Department of Biology, Georgia State University, Atlanta, GA 30303, USA.
出版信息
Cells. 2025 Jan 18;14(2):141. doi: 10.3390/cells14020141.
Lipophagy is a selective degradation of lipid droplets in lysosomes or vacuoles. Apart from its role in generating energy and free fatty acids for membrane repair, growth, and the formation of new membranes, lipophagy emerges as a key player in other cellular processes and disease pathogenesis. While fungal, plant, and algal cells use microlipophagy, the most prominent form of lipophagy in animal cells is macrolipophagy. However, recent studies showed that animal cells can also use microlipophagy to metabolize their lipid droplets. Therefore, to no surprise, microlipophagy is conserved from simple unicellular to the most complex multicellular eukaryotes, and many eukaryotic cells can operate both forms of lipophagy. Macrolipophagy is the most studied and better understood at the molecular level, while our understanding of microlipophagy is very sparse. This review will discuss microlipophagy from the perspective of its conservation in eukaryotes and its importance in diseases. To better appreciate the conserved nature of microlipophagy, different organisms and types of cells in which microlipophagy has been reported are also shown in a tabular form. We also point toward the gaps in our understanding of microlipophagy, including the signaling behind microlipophagy, especially in the cells of complex multicellular organisms.
脂质自噬是溶酶体或液泡中脂滴的选择性降解过程。除了在为膜修复、生长及新膜形成提供能量和游离脂肪酸方面发挥作用外,脂质自噬在其他细胞过程和疾病发病机制中也成为关键因素。真菌、植物和藻类细胞利用微自噬性脂质降解,而动物细胞中最显著的脂质自噬形式是巨自噬性脂质降解。然而,最近的研究表明动物细胞也能利用微自噬性脂质降解来代谢其脂滴。因此,不足为奇的是,从简单的单细胞生物到最复杂的多细胞真核生物,微自噬性脂质降解都是保守存在的,而且许多真核细胞都能进行这两种形式的脂质自噬。巨自噬性脂质降解是研究最多且在分子水平上理解得较好的,而我们对微自噬性脂质降解的了解却非常有限。本文将从其在真核生物中的保守性及其在疾病中的重要性的角度来讨论微自噬性脂质降解。为了更好地理解微自噬性脂质降解的保守特性,已报道存在微自噬性脂质降解的不同生物和细胞类型也以表格形式列出。我们还指出了我们在微自噬性脂质降解理解上的空白,包括微自噬性脂质降解背后的信号传导,尤其是在复杂多细胞生物的细胞中。