alpha-Synuclein abnormalities in mouse models of peroxisome biogenesis disorders.
alpha-Synuclein (alphaS) is a presynaptic protein implicated in Parkinson's disease (PD). Growing evidence implicates mitochondrial dysfunction, oxidative stress, and alphaS-lipid interactions in the gradual accumulation of alphaS in pathogenic forms and its deposition in Lewy bodies, the pathological hallmark of PD and related synucleinopathies. The peroxisomal biogenesis disorders (PBD), with Zellweger syndrome serving as the prototype of this group, are characterized by malformed and functionally impaired peroxisomes. Here we utilized the PBD mouse models Pex2-/-, Pex5-/-, and Pex13-/- to study the potential effects of peroxisomal dysfunction on alphaS-related pathogenesis. We found increased alphaS oligomerization and phosphorylation and its increased deposition in cytoplasmic inclusions in these PBD mouse models. Furthermore, we show that alphaS abnormalities correlate with the altered lipid metabolism and, specifically, with accumulation of long chain, n-6 polyunsaturated fatty acids that occurs in the PBD models.
Yakunin
Eugenia
E
Department of Biochemistry and Molecular Biology, The Institute for Medical Research-Israel Canada, Hebrew University, Jerusalem, Israel.
Moser
Ann
A
Loeb
Virginie
V
Saada
Ann
A
Faust
Phyllis
P
Crane
Denis I
DI
Baes
Myriam
M
Sharon
Ronit
R
D000074183:ATPases Associated with Diverse Cellular Activities; D000251:Adenosine Triphosphatases / Q000172:deficiency; D000818:Animals; D001921:Brain / Q000378:metabolism / Q000473:pathology; D002470:Cell Survival / Q000235:genetics; D004195:Disease Models, Animal; D042967:Electron Transport Complex I / Q000378:metabolism; D005227:Fatty Acids / Q000378:metabolism; D016631:Lewy Bodies / Q000378:metabolism / Q000473:pathology; D051379:Mice; D018345:Mice, Knockout; D008928:Mitochondria / Q000473:pathology; D001678:Organelle Biogenesis; D018384:Oxidative Stress / Q000502:physiology; D018901:Peroxisomal Disorders / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D020675:Peroxisomes / Q000378:metabolism*; D010766:Phosphorylation; D051844:alpha-Synuclein / Q000378:metabolism*
D005227:Fatty Acids; D051844:alpha-Synuclein; D000251:Adenosine Triphosphatases; D000074183:ATPases Associated with Diverse Cellular Activities; C495989:Pex1 protein, mouse; D042967:Electron Transport Complex I