TY - JOUR
T1 - ABCD2 is abundant in adipose tissue and opposes the accumulation of dietary erucic acid (C22:1) in fat
AU - Liu, Jingjing
AU - Sabeva, Nadezhda S.
AU - Bhatnagar, Saloni
AU - Li, Xiang An
AU - Pujol, Aurora
AU - Graf, Gregory A.
PY - 2010
Y1 - 2010
N2 - The ATP binding cassette transporter, ABCD2 (D2), is a peroxisomal protein whose mRNA has been detect ed in the adrenal, brain, liver, and fat. Although the role of this transporter in neural tissues has been studied, its function in adipose tissue remains unexplored. The level of immunoreactive D2 in epididymal fat is >50-fold of that found in brain or adrenal. D2 is highly enriched in adipocytes and is upregulated during adipogenesis but is not essen tial for adipocyte differentiation or lipid accumulation in day 13.5 mouse embryonic fibroblasts isolated from D2-deficient (D2-/-) mice. Although no differences were appreci ated in differentiation percentage, total lipid accumulation was greater in D2-/- adipocytes compared with the wild type. These results were consistent with in vivo observa tions in which no significant differences in adiposity or adipocyte diameter between wild-type and D2-/- mice were observed. D2-/- adipose tissue showed an increase in the abundance of 20:1 and 22:1 fatty acids. When mice were challenged with a diet enriched in erucic acid (22:1), this lipid accumulated in the adipose tissue in a gene-dosage-dependent manner. In conclusion, D2 is a sterol regulatory element binding protein target gene that is highly abundant in fat and opposes the accumulation of dietary lipids generally absent from the triglyceride storage pool within adipose tissue.
AB - The ATP binding cassette transporter, ABCD2 (D2), is a peroxisomal protein whose mRNA has been detect ed in the adrenal, brain, liver, and fat. Although the role of this transporter in neural tissues has been studied, its function in adipose tissue remains unexplored. The level of immunoreactive D2 in epididymal fat is >50-fold of that found in brain or adrenal. D2 is highly enriched in adipocytes and is upregulated during adipogenesis but is not essen tial for adipocyte differentiation or lipid accumulation in day 13.5 mouse embryonic fibroblasts isolated from D2-deficient (D2-/-) mice. Although no differences were appreci ated in differentiation percentage, total lipid accumulation was greater in D2-/- adipocytes compared with the wild type. These results were consistent with in vivo observa tions in which no significant differences in adiposity or adipocyte diameter between wild-type and D2-/- mice were observed. D2-/- adipose tissue showed an increase in the abundance of 20:1 and 22:1 fatty acids. When mice were challenged with a diet enriched in erucic acid (22:1), this lipid accumulated in the adipose tissue in a gene-dosage-dependent manner. In conclusion, D2 is a sterol regulatory element binding protein target gene that is highly abundant in fat and opposes the accumulation of dietary lipids generally absent from the triglyceride storage pool within adipose tissue.
KW - ALDL1
KW - ALDR
KW - Peroxisome
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U2 - 10.1194/jlr.M900237-JLR200
DO - 10.1194/jlr.M900237-JLR200
M3 - Article
C2 - 19556607
AN - SCOPUS:73149109060
SN - 0022-2275
VL - 51
SP - 162
EP - 168
JO - Journal of Lipid Research
JF - Journal of Lipid Research
IS - 1
ER -