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Sensitive Measurement of Mitophagy by Flow Cytometry Using the pH-dependent Fluorescent Reporter mt-Keima
Published on: August 12, 2018
FUNDC1: A Promising Mitophagy Regulator at the Mitochondria-Associated Membrane for Cardiovascular Diseases
Guoyong Li1,2,3, Junli Li1, Ruochen Shao1,2,3
1Laboratory of Heart Valve Disease, West China Hospital, Sichuan University, Chengdu, China.
Abstract:
Mitochondrial autophagy (or mitophagy) regulates the mitochondrial network and function to contribute to multiple cellular processes. The protective effect of homeostatic mitophagy in cardiovascular diseases (CVDs) has attracted increasing attention. FUN14 domain containing 1 (FUNDC1), an identified mitophagy receptor, plays an essential role in CVDs. Different expression levels of FUNDC1 and its phosphorylated state at different sites alleviate or exacerbate hypoxia and ischemia/reperfusion injury, cardiac hypertrophy, or metabolic damage through promotion or inhibition of mitophagy. In addition, FUNDC1 can be enriched at contact sites between mitochondria and the endoplasmic reticulum (ER), determining the formation of mitochondria-associated membranes (MAMs) that regulate cellular calcium (Ca2+) homeostasis and mitochondrial dynamics to prevent heart dysfunction. Moreover, FUNDC1 has also been involved in inflammatory cardiac diseases such as septic cardiomyopathy. In this review, we collect and summarize the evidence on the roles of FUNDC1 exclusively in various CVDs, describing its interactions with different cellular organelles, its involvement in multiple cellular processes, and its associated signaling pathways. FUNDC1 may become a promising therapeutic target for the prevention and management of various CVDs.
Insights
Mitochondrial autophagy receptor FUNDC1 plays a key role in cardiovascular diseases (CVDs). Its regulation of mitophagy impacts heart function, potentially offering a new therapeutic target for CVDs.
Area of Science:
- Cell Biology
- Cardiovascular Research
- Mitochondrial Dynamics
Background:
- Mitochondrial autophagy (mitophagy) is crucial for cellular health and cardiovascular function.
- Homeostatic mitophagy's protective role in cardiovascular diseases (CVDs) is gaining attention.
- FUN14 domain containing 1 (FUNDC1) is an identified mitophagy receptor implicated in CVDs.
Purpose of the Study:
- To review the multifaceted roles of FUNDC1 in various cardiovascular diseases.
- To elucidate FUNDC1's interactions with cellular organelles and its involvement in cellular processes.
- To explore FUNDC1's potential as a therapeutic target for CVDs.
Main Methods:
- Literature review summarizing existing research on FUNDC1 in CVDs.
- Analysis of FUNDC1's role in mitophagy regulation.
- Investigation of FUNDC1's involvement in mitochondria-associated membranes (MAMs) and calcium homeostasis.
Main Results:
- FUNDC1 expression and phosphorylation influence outcomes in hypoxia, ischemia/reperfusion injury, cardiac hypertrophy, and metabolic damage.
- FUNDC1 regulates mitochondrial dynamics and calcium homeostasis via MAMs.
- FUNDC1 is involved in inflammatory conditions like septic cardiomyopathy.
Conclusions:
- FUNDC1's diverse roles in cardiovascular pathophysiology are highlighted.
- FUNDC1's interactions with organelles and signaling pathways are critical for heart function.
- FUNDC1 presents a promising therapeutic avenue for cardiovascular disease prevention and management.
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