Poly(ADP-ribosyl)ation and Genome Integrity, Laboratoire d'Excellence Medalis, UMR 7242, CNRS/Université de Strasbourg, Institut de Recherche de L'Ecole de Biotechnologie de Strasbourg, 300 bld. S. Brant, CS10413, 67412 Illkirch, France.
Cellular Biology and Immunology, Instituto de Parasitología y Biomedicina López Neyra, CSIC/IPBLN, CIBERONC, Parque Tecnológico de Ciencias de la Salud de Granada, 17 Avenida del Conocimiento, 18016 Armilla, Spain.
Oxid Med Cell Longev. 2019 Jun 9;2019:2641712. doi: 10.1155/2019/2641712. eCollection 2019.
Autophagy is considered to be the primary degradative pathway that takes place in all eukaryotic cells. Morphologically, the autophagy pathway refers to a process by which cytoplasmic portions are delivered to double-membrane organelles, called autophagosomes, to fuse with lysosomes for bulk degradation. Autophagy, as a prosurvival mechanism, can be stimulated by different types of cellular stress such as nutrient deprivation, hypoxia, ROS, pH, DNA damage, or ER stress, promoting adaptation of the cell to the changing and hostile environment. The functional relevance of autophagy in many diseases such as cancer or neurodegenerative diseases remains controversial, preserving organelle function and detoxification and promoting cell growth, although in other contexts, autophagy could suppress cell expansion. Poly(ADP-ribosyl)ation (PARylation) is a covalent and reversible posttranslational modification (PTM) of proteins mediated by Poly(ADP-ribose) polymerases (PARPs) with well-described functions in DNA repair, replication, genome integrity, cell cycle, and metabolism. Herein, we review the current state of PARP1 activation and PARylation in starvation-induced autophagy.
自噬被认为是所有真核细胞中发生的主要降解途径。在形态学上,自噬途径是指细胞质部分被递送到双膜细胞器,称为自噬体,与溶酶体融合进行批量降解的过程。自噬作为一种促进生存的机制,可以被不同类型的细胞应激刺激,如营养剥夺、缺氧、ROS、pH 值、DNA 损伤或内质网应激,促进细胞适应不断变化和恶劣的环境。自噬在许多疾病中的功能相关性,如癌症或神经退行性疾病,仍然存在争议,它可以维持细胞器的功能和解毒,促进细胞生长,尽管在其他情况下,自噬可能会抑制细胞扩张。聚(ADP-核糖)化(PARylation)是一种由聚(ADP-核糖)聚合酶(PARPs)介导的蛋白质的共价和可逆的翻译后修饰(PTM),在 DNA 修复、复制、基因组完整性、细胞周期和代谢中具有明确的功能。在此,我们综述了饥饿诱导的自噬中 PARP1 激活和 PARylation 的最新研究进展。