Solid and fluid segments within the same molecule of stratum corneum ceramide lipid

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The outer layer of the skin, stratum corneum (SC) is an efficient transport barrier and it tolerates mechanical deformation. At physiological conditions, the majority of SC lipids are solid, while the presence of a small amount of fluid lipids is considered crucial for SC barrier and material properties. Here we use solid-state and diffusion nuclear magnetic resonance to characterize the composition and molecular dynamics of the fluid lipid fraction in SC model lipids, focusing on the role of the essential SC lipid CER EOS, which is a ceramide esterified omega-hydroxy sphingosine linoleate with very long chain. We show that both rigid and mobile structures are present within the same CER EOS molecule, and that the linoleate segments undergo fast isotropic reorientation while exhibiting extraordinarily slow self-diffusion. The characterization of this unusual self-assembly in SC lipids provides deepened insight into the molecular arrangement in the SC extracellular lipid matrix and the role of CER EOS linoleate in the healthy and diseased skin.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Leiden University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysikalisk kemi
Originalspråkengelska
Antal sidor9
TidskriftQuarterly Reviews of Biophysics
Volym51
Utgivningsnummere7
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa