MAPL调节了从溶酶体中通过气皮胺介导的mtDNA释放,以驱动热性细胞死亡
Mai Nguyen1,2, Jack J Collier1,2, Olesia Ignatenko1,2
1Department of Neurology and Neuroscience, Montréal Neurological Institute, McGill University, Montréal, Quebec, Canada.
Nature cell biology
|October 13, 2025
概括
线粒体定蛋白联酶 (MAPL) 通过将线粒体DNA移动到 lysosomes,触发炎症性细胞死亡 (pyroptosis). 这一途径与像帕金森氏症这样的神经退行性疾病有关.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
背景情况:
- 线粒体是细胞死亡的关键调节者,影响癌症和神经退行等疾病.
- 线粒体定蛋白联酶 (MAPL) 是线粒体外膜联酶,对细胞存活至关重要,但其在细胞死亡中的作用仍未确定.
研究的目的:
- 阐明MAPL控制细胞命运和生存的机制.
- 调查MAPL在炎症细胞死亡途径中的作用.
主要方法:
- 全基因组功能性遗传查. 全基因组功能性遗传查.
- 细胞生物学方法.
- 分析线粒体DNA贩运和溶酶体通透性的分析.
主要成果:
- 过度表达MAPL通过涉及线粒体和溶解体的炎症途径诱导热.
- MAPL促进线粒体DNA (mtDNA) 在囊泡中的传输到 lysosomes,导致透和细胞质释放.
- 释放的mtDNA激活了cGAS通路,诱导细胞死亡. 与帕金森病相关的基因 (VPS35,LRRK2) 也调节了这个过程.
- 耗尽MAPL,LRRK2或VPS35可以抑制巨细胞的炎症性细胞死亡.
结论:
- MAPL是通过线粒体-溶解体依赖性炎症途径诱导热的关键诱导剂.
- 由MAPL介导的线粒体-溶解体通路是免疫信号和细胞死亡的核心.
- 对MAPL,LRRK2或VPS35的失调会影响炎症细胞死亡,并可能导致神经退行性疾病.
相关概念视频
The Intrinsic Apoptotic Pathway
8.3K
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
8.3K
Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
Necrosis
6.3K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
6.3K
The Extrinsic Apoptotic Pathway
8.1K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
8.1K
Apoptosis
14.1K
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
14.1K
Overview of Cell Death
9.4K
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
9.4K


