Gene expression of A6-like subgroup of ATP-binding cassette transporters in mouse brain parenchyma and microvessels

Masanori Tachikawa, Hidetoh Toki, Masahiko Watanabe, Masatoshi Tomi, Ken ichi Hosoya, Tetsuya Terasaki

Research output: Contribution to journalArticle

Abstract

The A-subclass of ATP-binding cassette (ABC) transporters is a highly conserved superfamily of potent lipid transporters. Although the ABCA1-like subgroup of ABCA1-4, and A7 have been shown to mediate the transport of endogenous lipids, the roles of the ABCA6-like subgroup transporters, which have been identified as a unique gene cluster on human chromosome 17q24 (ABCA5, A6, A8, A9, and A10) and mouse chromosome 11 (Abca5, a6, a8a, a8b, and a9), remains largely unknown. The purpose of the present study was to clarify the spatial and temporal expression profiles of Abca6-like subgroup transporters in embryonic and postnatal mouse brains by a combination of in situ hybridization and quantitative polymerase chain reaction (PCR) using magnetically isolated brain vascular endothelial cells. In embryonic brains, the transcripts of Abca5, a8a and a8b were detected predominantly in the mantle zone, where postmitotic neurons differentiate. At the postnatal stages, they were expressed in various nuclei and neuronal layers. Abca9 mRNA was detected diffusely in the embryonic and postnatal brains and sequential and/or strong spotted signals were detected in the leptomeninges on the brain surface. PCR detected expression of Abca8a and Abca9 mRNAs in isolated vascular endothelial cells. Expression signals for Abca6 mRNA were hardly observed at any stages examined. These distinct spatio-temporal expression patterns of Abca6-like subgroup transporters may reflect their functional significance and diversity to regulate lipid transport, particularly in neurons, leptomeningeal cells, and vascular endothelial cells.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalAnatomical Science International
DOIs
Publication statusAccepted/In press - 2018 Mar 8

Fingerprint

ATP-Binding Cassette Transporters
Microvessels
Gene Expression
Brain
Endothelial Cells
Lipids
Messenger RNA
Neurons
Polymerase Chain Reaction
Chromosomes, Human, Pair 11
antineoplaston A10
Human Chromosomes
Multigene Family
In Situ Hybridization

Keywords

  • ATP binding cassette transporter, sub-family A
  • Development
  • In situ hybridization
  • Leptomeninges
  • Microvessels

ASJC Scopus subject areas

  • Anatomy

Cite this

Gene expression of A6-like subgroup of ATP-binding cassette transporters in mouse brain parenchyma and microvessels. / Tachikawa, Masanori; Toki, Hidetoh; Watanabe, Masahiko; Tomi, Masatoshi; Hosoya, Ken ichi; Terasaki, Tetsuya.

In: Anatomical Science International, 08.03.2018, p. 1-8.

Research output: Contribution to journalArticle

Tachikawa, Masanori ; Toki, Hidetoh ; Watanabe, Masahiko ; Tomi, Masatoshi ; Hosoya, Ken ichi ; Terasaki, Tetsuya. / Gene expression of A6-like subgroup of ATP-binding cassette transporters in mouse brain parenchyma and microvessels. In: Anatomical Science International. 2018 ; pp. 1-8.
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