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2015 ; 56
(5
): 1006-13
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Bis(monoacylglycero)phosphate: a secondary storage lipid in the gangliosidoses
#MMPMID25795792
Akgoc Z
; Sena-Esteves M
; Martin DR
; Han X
; d'Azzo A
; Seyfried TN
J Lipid Res
2015[May]; 56
(5
): 1006-13
PMID25795792
show ga
Bis(monoacylglycero)phosphate (BMP) is a negatively charged glycerophospholipid
with an unusual sn-1;sn-1' structural configuration. BMP is primarily enriched in
endosomal/lysosomal membranes. BMP is thought to play a role in glycosphingolipid
degradation and cholesterol transport. Elevated BMP levels have been found in
many lysosomal storage diseases (LSDs), suggesting an association with lysosomal
storage material. The gangliosidoses are a group of neurodegenerative LSDs
involving the accumulation of either GM1 or GM2 gangliosides resulting from
inherited deficiencies in ?-galactosidase or ?-hexosaminidase, respectively.
Little information is available on BMP levels in gangliosidosis brain tissue. Our
results showed that the content of BMP in brain was significantly greater in
humans and in animals (mice, cats, American black bears) with either GM1 or GM2
ganglioside storage diseases, than in brains of normal subjects. The storage of
BMP and ganglioside GM2 in brain were reduced similarly following
adeno-associated viral-mediated gene therapy in Sandhoff disease mice. We also
found that C22:6, C18:0, and C18:1 were the predominant BMP fatty acid species in
gangliosidosis brains. The results show that BMP accumulates as a secondary
storage material in the brain of a broad range of mammals with gangliosidoses.