Abstract
Autophagy (i.e., “self-eating”) and apoptosis (i.e., type I programmed cell death) are essential and intimately involved in molecular, cellular, and whole-body homeostasis in humans and animals. Autophagy has been categorized as a mechanism of intracellular degradation, recycling, defense, and survival. To date, three types of autophagy have been identified: macroautophagy, microautophagy, and chaperone-mediated autophagy. Recent discoveries strongly suggest that macroautophagy also modulates type II programmed cell death under specific circumstances. Autophagy and apoptosis are fundamentally distinct processes, but are interconnected by common stress initiators and intermediate regulators. During the past two decades, the role of amino acid metabolism and signaling in the regulation of apoptosis and autophagy has been intensively studied. In this review, we summarize recent advances in our understanding of the molecular mechanisms that regulate both autophagy and apoptosis in the context of amino acid signaling.
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Abbreviations
- AIF:
-
Apoptosis-inducing factor
- AMBRA1:
-
Activating molecule in BECN1-regulated autophagy protein 1
- AMPK:
-
AMP-activated protein kinase
- Apaf-1:
-
Apoptotic protease-activating factor-1
- ApoL6:
-
Apolipoprotein L6
- Atg:
-
Autophagy-related gene
- BAD:
-
Bcl-2-associated death protein
- Bcl-2:
-
B cell lymphoma 2
- Beclin 1:
-
Bcl-2 interacting protein 1
- Bfl-1:
-
Bcl-2-related gene expressed in fetal liver
- BH3:
-
Bcl-2-homology-3 domain
- BH:
-
Bcl-2 homology
- BID:
-
BH3 interacting-domain death agonist
- Bif-1:
-
Bax-interacting factor-1
- DAPK:
-
Death-associated protein kinase
- DISC:
-
Death-inducing signaling complex
- DRAM:
-
Damage-regulated autophagy modulator
- ER:
-
Endoplasmic reticulum
- ERK:
-
Extracellular signal-regulated kinase
- FADD:
-
FAS-associated death domain protein
- FLICE:
-
FADD-like interleukin-1 β-converting enzyme
- FIP200:
-
Focal adhesion kinase family-interacting protein of 200 kDa
- hVps34:
-
Human vacuolar protein sorting-34
- IAPs:
-
Inhibitors of apoptosis proteins
- IGF-1:
-
Insulin-like growth factor-1
- IRS:
-
Insulin receptor substrate
- JNK:
-
c-Jun N-terminal kinase
- LC3:
-
Microtubule-associated protein 1 light chain 3
- MAPK:
-
Mitogen-activated protein kinase
- MOMP:
-
Mitochondrial outer membrane permeabilization
- mTOR:
-
Mammalian target of rapamycin
- PCD:
-
Programmed cell death
- PI3K:
-
Phosphoinositide 3-kinase
- ROS:
-
Reactive oxygen species
- PRAS40:
-
Proline-rich AKT substrate of 40 kDa
- SMAC:
-
Second mitochondrial-derived activator of caspase
- TIGAR:
-
TP53-inducible glycolysis and apoptosis regulator
- TNF-α:
-
Tumor necrosis factor-α
- TRAIL:
-
Tumor necrosis factor-related apoptosis-inducing ligand
- TSC1/2:
-
Tuberous sclerosis complex1/2
- ULK1:
-
unc-51-like autophagy activating kinase 1
- UVRAG:
-
Ultraviolet irradiation resistance-associated gene
- SLC38A9:
-
Member 9 of the solute carrier family 38
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Acknowledgments
This work was supported by the National Institute of Health (5RO1CA106644 to CAAH), the National Key Basic Research Program of China (2013CB127302 to Z.W. and G.W.), and the Natural Science Foundation of China (31172217, 31272450, and 31272451 to Z.W. and G.W.), the Chinese Universities Scientific Fund (2013RC002), the Program for New Century Excellent Talents in University (NCET-12-0522), and the Program for Beijing Municipal Excellent Talents, the Agriculture and Food Research Initiative Competitive Grant from the USDA National Institute of Food and Agriculture (No. 2014-67015-21770), and Texas A&M AgriLife Research (H-8200).
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Zhenlong Wu and Chien-An A. Hu have equally contributed.
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Wu, Z., Hu, CA.A., Wu, G. et al. Intimacy and a deadly feud: the interplay of autophagy and apoptosis mediated by amino acids. Amino Acids 47, 2089–2099 (2015). https://doi.org/10.1007/s00726-015-2084-0
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DOI: https://doi.org/10.1007/s00726-015-2084-0