Correlated fluorescence microscopy and multi-ion beam secondary ion mass spectrometry imaging reveals phosphatidylethanolamine increases in the membrane of cancer cells over-expressing the molecular chaperone subunit CCTδ
Artikel i vetenskaplig tidskrift, 2020

Changes in the membrane composition of sub-populations of cells can influence different properties with importance to tumour growth, metastasis and treatment efficacy. In this study, we use correlated fluorescence microscopy and ToF-SIMS with C60+ and (CO2)6k+ ion beams to identify and characterise sub-populations of cells based on successful transfection leading to over-expression of CCTδ, a component of the multi-subunit molecular chaperone named chaperonin-containing tailless complex polypeptide 1 (CCT). CCT has been linked to increased cell growth and proliferation and is known to affect cell morphology but corresponding changes in lipid composition of the membrane have not been measured until now. Multivariate analysis of the surface mass spectra from single cells, focused on the intact lipid ions, indicates an enrichment of phosphatidylethanolamine species in the transfected cells. While the lipid changes in this case are driven by the structural changes in the protein cytoskeleton, the consequence of phosphatidylethanolamine enrichment may have additional implications in cancer such as increased membrane fluidity, increased motility and an ability to adapt to a depletion of unsaturated lipids during cancer cell proliferation. This study demonstrates a successful fluorescence microscopy-guided cell by cell membrane lipid analysis with broad application to biological investigation. Graphical abstract

Chaperonin

Membrane curvature

Fluorescence microscopy

Lipids

ToF-SIMS

Phosphatidylethanolamine

Författare

John Fletcher

Göteborgs universitet

Sanna Sämfors

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Paul Gatenholm Group

Göteborgs universitet

Josefine Vallin

Göteborgs universitet

Andreas Svanström

Göteborgs universitet

Julie Grantham

Göteborgs universitet

Analytical and Bioanalytical Chemistry

1618-2642 (ISSN) 1618-2650 (eISSN)

Vol. In Press

Ämneskategorier

Cellbiologi

Cell- och molekylärbiologi

Medicinsk bioteknologi (med inriktning mot cellbiologi (inklusive stamcellsbiologi), molekylärbiologi, mikrobiologi, biokemi eller biofarmaci)

DOI

10.1007/s00216-020-03013-9

PubMed

33130974

Mer information

Senast uppdaterat

2020-11-12