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Ca(2+) Ion and Autophagy

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Autophagy: Biology and Diseases

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 1206))

Abstract

Controlled by a strict mechanism, intracellular calcium (Ca(2+)) is closely related to various cellular activities, including the regulation of autophagy. Researchers believed that under normal or stress state, Ca(2+) has a positive or negative regulation effect on autophagy, the mechanisms of which are different. This bidirectional role of Ca(2+), promotive or suppressing in the regulation of autophagy under different conditions remains controversial, so as the potential mechanisms. Several studies reported that Ca(2+) promotes autophagy through plenty of ways, like inositol 1,4,5-trisphosphate receptor (IP3R) and beclin1 pathway, calmodulin-dependent kinase kinase beta (CaMKKβ)–AMPK–mTOR pathway, mitochondrial energy metabolism-related Ca(2+) uptake, lysosome’s regulation of Ca(2+) signal, and so on. Others thought Ca(2+) may inhibit autophagy through IP3R and beclin1–Bcl-2 complex and the AMPK–mTOR pathway, either. It seems to be still a long way to thoroughly understand the truth of Ca(2+) and autophagy.

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Abbreviations

[Ca(2+)]cyt:

Cytoplasmic calcium concentration

[Ca(2+)]ER:

Endoplasmic reticulum calcium concentration

2-APB:

2-Aminoethoxydiphenyl borate

AMP:

Adenosine monophosphate

AMPK:

Adenosine 5′-monophosphate (AMP)-activated protein kinase

Atg:

Autophagy associated gene

ATP:

Adenosine triphosphate

Ca(2+):

Calcium ion

CaMKK:

Calmodulin-dependent protein kinase kinase

cAMP:

Cyclic adenosine monophosphate

CICR:

Calcium-induced Ca(2+) release

DAPK:

Death-associated protein kinase

DRAM:

Damage-regulated autophagy modulator

Epac:

Exchange protein directly activated by cAMP

GFP:

Green fluorescent protein

GPN:

Glycine-L-phenylalanine amide-naphthalene

IMPase:

Inositol monophosphatase

IP3:

1,4,6-inositol triphosphate

IP3R:

1,4,5-inositol triphosphate receptor

LC3:

Microtubule-associated protein 1 light chain 3

LRRK:

Leucine-rich repeat kinase

mTOR:

Mammalian target of rapamycin

NAADP:

Nicotinic acid adenine dinucleotide phosphate

NAD:

Nicotinamide adenine dinucleotide

NADH:

Reduced form of nicotinamide-adenine dinucleotid

OCR:

Oxygen consumption rate

PDH:

Pyruvate dehydrogenase

PLC:

Phospholipase C

PTP:

Permeability transition pore

ROS:

Reactive oxygen species

SERCA:

Sarco/endoplasmic reticulum Ca(2+) ATPase

siRNA:

Small interfering RNA

SNAREs:

Soluble N-ethylmaleimide-sensitive factor attachment protein receptor

TPCs:

Two-pore channels

TRP:

Transient receptor potential channel

TRPML:

Transient receptor potential channel, mucolipin subfamily

ULK:

Uncoordinated 51-like kinase

VDAC:

Voltage-dependent anion-selective channel

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Correspondence to Qing Jing .

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Hu, YX., Han, XS., Jing, Q. (2019). Ca(2+) Ion and Autophagy. In: Qin, ZH. (eds) Autophagy: Biology and Diseases. Advances in Experimental Medicine and Biology, vol 1206. Springer, Singapore. https://doi.org/10.1007/978-981-15-0602-4_7

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