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The Lysophosphatidylserines—An Emerging Class of Signalling Lysophospholipids

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Abstract

Lysophospholipids are potent hormone-like signalling biological lipids that regulate many important biological processes in mammals (including humans). Lysophosphatidic acid and sphingosine-1-phosphate represent the best studied examples for this lipid class, and their metabolic enzymes and/or cognate receptors are currently under clinical investigation for treatment of various neurological and autoimmune diseases in humans. Over the past two decades, the lysophsophatidylserines (lyso-PSs) have emerged as yet another biologically important lysophospholipid, and deregulation in its metabolism has been linked to various human pathophysiological conditions. Despite its recent emergence, an exhaustive review summarizing recent advances on lyso-PSs and the biological pathways that this bioactive lysophospholipid regulates has been lacking. To address this, here, we summarize studies that led to the discovery of lyso-PS as a potent signalling biomolecule, and discuss the structure, its detection in biological systems, and the biodistribution of this lysophospholipid in various mammalian systems. Further, we describe in detail the enzymatic pathways that are involved in the biosynthesis and degradation of this lipid and the putative lyso-PS receptors reported in the literature. Finally, we discuss the various biological pathways directly regulated by lyso-PSs in mammals and prospect new questions for this still emerging biomedically important signalling lysophospholipid.

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Abbreviations

ABHD:

α/β-Hydrolase domain

CMC:

Critical micellar concentration

CNS:

Central nervous system

CoA:

Coenzyme-A

ConA:

Concanavalin A

DAG:

Diacylglycerol

ER:

Endoplasmic reticulum

GPCR:

G-Protein-coupled Receptors

GPS:

Glycero-phospho-L-serine

HPLC:

High performance liquid chromatography

LC–MS:

Liquid chromatography coupled to mass spectrometry

MAG:

Monoacylglycerol

MBOAT:

Membrane-bound O-acyl-transferase

MRM:

Multiple reaction monitoring

PA:

Phosphatidic acid

PC:

Phosphatidylcholine

PE:

Phosphatidylethanolamine

PHARC:

Polyneuropathy, hearing loss, ataxia, retinitis pigmentosa and cataract

PI:

Phosphatidylinositol

PS:

Phosphatidylserine

S1P:

Sphingosine 1-phosphate

TAG:

Triacylglycerol

VLC:

Very long chain

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Acknowledgements

We thank Shubham Singh (IISER Pune) for critical comments and thoughtful discussions on this review. This work was supported by the DBT/Wellcome Trust India Alliance Fellowship [Grant Number IA/I/15/2/502058] to S.S.K.

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Correspondence to Siddhesh S. Kamat.

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The authors declare that they have no conflict of interest.

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Shanbhag, K., Mhetre, A., Khandelwal, N. et al. The Lysophosphatidylserines—An Emerging Class of Signalling Lysophospholipids. J Membrane Biol 253, 381–397 (2020). https://doi.org/10.1007/s00232-020-00133-2

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  • DOI: https://doi.org/10.1007/s00232-020-00133-2

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