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Knocking Out Sigma-1 Receptors Reveals Diverse Health Problems

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Abstract

Sigma-1 receptor (Sig-1R) is a protein present in several organs such as brain, lung, and heart. In a cell, Sig-1R is mainly located across the membranes of the endoplasmic reticulum and more specifically at the mitochondria-associated membranes. Despite numerous studies showing that Sig-1R could be targeted to rescue several cellular mechanisms in different pathological conditions, less is known about its fundamental relevance. In this review, we report results from various studies and focus on the importance of Sig-1R in physiological conditions by comparing Sig-1R KO mice to wild-type mice in order to investigate the fundamental functions of Sig-1R. We note that the Sig-1R deletion induces cognitive, psychiatric, and motor dysfunctions, but also alters metabolism of heart. Finally, taken together, observations from different experiments demonstrate that those dysfunctions are correlated to poor regulation of ER and mitochondria metabolism altered by stress, which could occur with aging.

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Abbreviations

AAV:

Adeno-associated virus

ACTH:

Adrenocorticotropic hormone

AD:

Alzheimer’s disease

Ala:

Alamine

ALS:

Amyotrophic lateral sclerosis

AMRS:

Acute mild restraint stress

ATP:

Adenosine triphosphate

BiP:

Binding immunoglobulin protein

CA1:

Cornu Ammonis 1

cAMP:

Cyclic adenosine monophosphate

CD1:

Capsaicin sensitized

CNS:

Central nervous system

CPS1:

Carbamoyl phosphate synthetase I

CREB:

cAMP response element-binding protein

CRF:

Corticotropin-releasing factor

DG:

Dentate gyrus

DMT:

N,N-dimethyltryptamine

DRG:

Dorsal root ganglion

eGFP:

Enhanced GFP

ERK1/2:

Extracellular signal-regulated kinases 1 and 2

FST:

Forced swim test

GFP:

Green fluorescent protein

Gln:

Glutamine

Glu:

Glutamic acid

GRP78:

78-kDa glucose-regulated protein

GSSG:

Oxidized glutathione

HD:

Huntington’s disease

HPA:

Hypothalamic pituitary adrenal

HSP5:

Heat shock protein 5

IP3R:

Inositol trisphosphate receptor

IRE1:

Inositol-requiring enzyme 1

KD:

Knockdown

KO:

Knockout

MAM:

Mitochondria-associated membranes

mRNA:

Messenger RNA

Mups:

Major urinary proteins

NMDA:

N-methyl-d-aspartate

NMDAr:

NMDA receptor

NR2B:

NMDA receptor subtype 2B

OVX:

Ovariectomizing

PD:

Parkinson’s disease

pERK1/2:

Phosphorylated ERK1/2

PET:

Positron emission tomography

PKA:

Protein kinase A

PKC:

Protein kinase C

PMA:

Phorbol 12-myristate 13-acetate

PP2:

4-Amino-5-(4-chlorophenyl)-7-(dimethylethyl)pyrazolo[3,4-d]pyrimidine

Prdx6:

Peroxiredoxin-6

PSNL:

Partial sciatic nerve ligation

PVN:

Paraventricular nucleus of the hypothalamus

ROS:

Reactive oxygen speices

SCI:

Spinal cord contusion injury

Sig-1R:

Sigma-1 receptor

SKF:

Alazocine

STPA:

Step-through passive avoidance

Thr:

Threonine

TRPV1:

Transient receptor potential cation channel, subfamily V, member 1

TST:

Tail suspension test

Val:

Valine

WT:

Wild-type

XBP1:

X-box binding protein 1

YMT:

Y-maze test

References

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Acknowledgements

This research was supported by the Intramural Research Program of the National Institute on Drug Abuse and the National Institutes of Health. We would also like to thank Dr. Mary Pfeiffer and Dr. Jean-Charles Lievens for their corrections.

Funding

The authors were supported by the Intramural research program NIDA, NIH/DHHS.

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Authors

Contributions

SC proposed the topic. SC and NG initiated the work. All authors reviewed the literature, drafted parts of the manuscript and revised it. All authors approved the submitted version.

Corresponding author

Correspondence to Simon Couly.

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Conflict of interest

The authors declare that they have no conflict of interest.

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Couly, S., Goguadze, N., Yasui, Y. et al. Knocking Out Sigma-1 Receptors Reveals Diverse Health Problems. Cell Mol Neurobiol 42, 597–620 (2022). https://doi.org/10.1007/s10571-020-00983-3

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  • DOI: https://doi.org/10.1007/s10571-020-00983-3

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