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Updated: Jun 30, 2025

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
Published on: January 31, 2025
MCOLN1/TRPML1 in the lysosome: a promising target for autophagy modulation in diverse diseases
Jiansong Qi1, Qingqing Li2, Tianli Xin2
1Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China.
Abstract:
MCOLN1/TRPML1 is a nonselective cationic channel specifically localized to the late endosome and lysosome. With its property of mediating the release of several divalent cations such as Ca2+, Zn2+ and Fe2+ from the lysosome to the cytosol, MCOLN1 plays a pivotal role in regulating a variety of cellular events including endocytosis, exocytosis, lysosomal biogenesis, lysosome reformation, and especially in Macroautophagy/autophagy. Autophagy is a highly conserved catabolic process that maintains cytoplasmic integrity by removing superfluous proteins and damaged organelles. Acting as the terminal compartments, lysosomes are crucial for the completion of the autophagy process. This review delves into the emerging role of MCOLN1 in controlling the autophagic process by regulating lysosomal ionic homeostasis, thereby governing the fundamental functions of lysosomes. Furthermore, this review summarizes the physiological relevance as well as molecular mechanisms through which MCOLN1 orchestrates autophagy, consequently influencing mitochondria turnover, cell apoptosis and migration. In addition, we have illustrated the implications of MCOLN1-regulated autophagy in the pathological process of cancer and myocardial ischemia-reperfusion (I/R) injury. In summary, given the involvement of MCOLN1-mediated autophagy in the pathogenesis of cancer and myocardial I/R injury, targeting MCOLN1 May provide clues for developing new therapeutic strategies for the treatment of these diseases. Exploring the regulation of MCOLN1-mediated autophagy in diverse diseases contexts will surely broaden our understanding of this pathway and offer its potential as a promising drug target.Abbreviation: CCCP:carbonyl cyanide3-chlorophenylhydrazone; CQ:chloroquine; HCQ: hydroxychloroquine;I/R: ischemia-reperfusion; MAP1LC3/LC3:microtubule associated protein 1 light chain 3; MCOLN1/TRPML1:mucolipin TRP cation channel 1; MLIV: mucolipidosis type IV; MTORC1:MTOR complex 1; ROS: reactive oxygenspecies; SQSTM1/p62: sequestosome 1.
Insights
Mucolipin TRP cation channel 1 (MCOLN1) regulates lysosomal function and autophagy. Targeting MCOLN1 offers potential therapeutic strategies for cancer and ischemia-reperfusion injury by modulating autophagy.
Area of Science:
- Cell Biology
- Molecular Biology
- Physiology
Background:
- Mucolipin TRP cation channel 1 (MCOLN1/TRPML1) is a lysosomal ion channel regulating cellular processes.
- Autophagy is a critical catabolic process for maintaining cellular homeostasis, with lysosomes serving as terminal compartments.
- MCOLN1's role in lysosomal function is intrinsically linked to the completion of autophagy.
Purpose of the Study:
- To review the emerging role of MCOLN1 in controlling autophagy.
- To elucidate the molecular mechanisms and physiological relevance of MCOLN1-orchestrated autophagy.
- To explore the implications of MCOLN1-regulated autophagy in cancer and myocardial ischemia-reperfusion (I/R) injury.
Main Methods:
- Literature review focusing on MCOLN1's function in lysosomal ionic homeostasis.
- Analysis of MCOLN1's impact on cellular events like mitochondria turnover, apoptosis, and migration.
- Examination of MCOLN1-mediated autophagy in the context of specific diseases.
Main Results:
- MCOLN1 regulates lysosomal ion release, influencing key cellular functions and autophagy.
- MCOLN1-mediated autophagy impacts mitochondria turnover, cell apoptosis, and migration.
- Dysregulated MCOLN1-autophagy is implicated in the pathogenesis of cancer and myocardial I/R injury.
Conclusions:
- MCOLN1 plays a crucial role in governing lysosomal function and the autophagic process.
- Targeting MCOLN1-mediated autophagy presents a potential therapeutic avenue for cancer and myocardial I/R injury.
- Further exploration of MCOLN1-regulated autophagy in various diseases may reveal new therapeutic targets.
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