Adaptative Up-Regulation of PRX2 and PRX5 Expression Characterizes Brain from a Mouse Model of Chorea-Acanthocytosis

oleh: Enrica Federti, Alessandro Matte, Veronica Riccardi, Kevin Peikert, Seth L. Alper, Adrian Danek, Ruth H. Walker, Angela Siciliano, Iana Iatcenko, Andreas Hermann, Lucia De Franceschi

Format: Article
Diterbitkan: MDPI AG 2021-12-01

Deskripsi

The peroxiredoxins (PRXs) constitute a ubiquitous antioxidant. Growing evidence in neurodegenerative disorders such as Parkinson’s disease (PD) or Alzheimer’s disease (AD) has highlighted a crucial role for PRXs against neuro-oxidation. Chorea-acanthocytosis/<i>Vps13A</i> disease (ChAc) is a devastating, life-shortening disorder characterized by acanthocytosis, neurodegeneration and abnormal proteostasis. We recently developed a <i>Vps13a<sup>−/−</sup></i> ChAc-mouse model, showing acanthocytosis, neurodegeneration and neuroinflammation which could be restored by LYN inactivation. Here, we show in our <i>Vps13a<sup>−/−</sup></i> mice protein oxidation, NRF2 activation and upregulation of downstream cytoprotective systems NQO1, SRXN1 and TRXR in basal ganglia. This was associated with upregulation of PRX2/5 expression compared to wild-type mice. PRX2 expression was age-dependent in both mouse strains, whereas only <i>Vps13a<sup>−/−</sup></i> PRX5 expression was increased independent of age. LYN deficiency or nilotinib-mediated LYN inhibition improved autophagy in <i>Vps13a<sup>−/−</sup></i> mice. In <i>Vps13a<sup>−/−</sup>; Lyn<sup>−/−</sup></i> basal ganglia, absence of LYN resulted in reduced NRF2 activation and down-regulated expression of PRX2/5, SRXN1 and TRXR. Nilotinib treatment of <i>Vps13a<sup>−/−</sup></i> mice reduced basal ganglia oxidation, and plasma PRX5 levels, suggesting plasma PRX5 as a possible ChAc biomarker. Our data support initiation of therapeutic Lyn inhibition as promptly as possible after ChAc diagnosis to minimize development of irreversible neuronal damage during otherwise inevitable ChAc progression.