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@ARTICLE{Rondelli:916472,
author = {Rondelli, Valeria and Koutsioumpas, Alexandros and Di Cola,
Emanuela and Fragneto, Giovanna and Grillo, I. and Del
Favero, Elena and Colombo, Laura and Cantù, Laura and
Brocca, Paola and Salmona, Mario},
title = {{D}ysmyelination and glycolipid interference caused by
phenylalanine in phenylketonuria},
journal = {International journal of biological macromolecules},
volume = {221},
issn = {0141-8130},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2022-06264},
pages = {784 - 795},
year = {2022},
abstract = {Phenylketonuria (PKU) is a metabolic disorder connected to
an excess of phenylalanine (Phe) in the blood and tissues,
with neurological consequences. The disease's molecular
bases seem to be related to the accumulation of Phe at the
cell membrane surface. Radiological outcomes in the brain
demonstrate decreased water diffusivity in white matter,
involving axon dysmyelination of not yet understood origin.
We used a biophysical approach and model membranes to extend
our knowledge of Phe–membrane interaction by clarifying
Phe's propensity to affect membrane structure and dynamics
based on lipid composition, with emphasis on modulating
cholesterol and glycolipid components to mimic raft domains
and myelin sheath membranes. Phe showed affinity for the
investigated membrane mimics, mainly affecting the
Phe-facing membrane leaflet. The surfaces of our neuronal
membrane raft mimics were strong anchoring sites for Phe,
showing rigidifying effects. From a therapeutic perspective,
we further investigated the role of doxycycline, known to
disturb Phe packing, unveiling its action as a competitor in
Phe interactions with the membrane, suggesting its potential
for treatment in the early stages of PKU. Our results
suggest how Phe accumulation in extracellular fluids can
impede normal growth of myelin sheaths by interfering with
membrane slipping and by remodulating free water and
myelin-associated water contents.},
cin = {JCNS-FRM-II / MLZ / JCNS-1 / JCNS-4},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-4-20201012},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4) / 632 - Materials – Quantum, Complex and
Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)MARIA-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {36099998},
UT = {WOS:000860501900004},
doi = {10.1016/j.ijbiomac.2022.09.062},
url = {https://juser.fz-juelich.de/record/916472},
}