» Articles » PMID: 38977599

Downregulation of ATP8B2 to Assess Plasmalogen Distribution and Far1 Expression in Primary Trabecular Meshwork Cells

Overview
Specialty Molecular Biology
Date 2024 Jul 8
PMID 38977599
Authors
Affiliations
Soon will be listed here.
Abstract

The trabecular meshwork (TM) from primary open-angle glaucoma (POAG) cases has been found to contain decreased levels of intracellular plasmalogens. Plasmalogens are a subset of lipids involved in diverse cellular processes such as intracellular signaling, membrane asymmetry, and protein regulation. Proper plasmalogen biosynthesis is regulated by rate-limiting enzyme fatty acyl-CoA reductase (Far1). ATPase phospholipid transporting 8B2 (ATP8B2) is a type IV P-type ATPase responsible for the asymmetric distribution of plasmalogens between the intracellular and extracellular leaflets of the plasma membranes. Here we describe the methodology for extraction and culturing of TM cells from corneal tissue and subsequent downregulation of ATP8B2 using siRNA transfection. Further quantification and downstream effects of ATP8B2 gene knockdown will be analyzed utilizing immunoblotting techniques.

References
1.
Takatsu H, Tanaka G, Segawa K, Suzuki J, Nagata S, Nakayama K . Phospholipid flippase activities and substrate specificities of human type IV P-type ATPases localized to the plasma membrane. J Biol Chem. 2014; 289(48):33543-56. PMC: 4246107. DOI: 10.1074/jbc.M114.593012. View

2.
Acar N, Berdeaux O, Juaneda P, Gregoire S, Cabaret S, Joffre C . Red blood cell plasmalogens and docosahexaenoic acid are independently reduced in primary open-angle glaucoma. Exp Eye Res. 2009; 89(6):840-53. DOI: 10.1016/j.exer.2009.07.008. View

3.
Honsho M, Mawatari S, Fujiki Y . ATP8B2-Mediated Asymmetric Distribution of Plasmalogens Regulates Plasmalogen Homeostasis and Plays a Role in Intracellular Signaling. Front Mol Biosci. 2022; 9:915457. PMC: 9271795. DOI: 10.3389/fmolb.2022.915457. View

4.
Honsho M, Asaoku S, Fujiki Y . Posttranslational regulation of fatty acyl-CoA reductase 1, Far1, controls ether glycerophospholipid synthesis. J Biol Chem. 2010; 285(12):8537-42. PMC: 2838275. DOI: 10.1074/jbc.M109.083311. View

5.
Honsho M, Abe Y, Fujiki Y . Plasmalogen biosynthesis is spatiotemporally regulated by sensing plasmalogens in the inner leaflet of plasma membranes. Sci Rep. 2017; 7:43936. PMC: 5341075. DOI: 10.1038/srep43936. View