Abstract:
:No evidence of premature vascular disease is found in apolipoprotein A-I(Milano) (apoA-I(M)) human carriers, despite very low high density lipoprotein (HDL) cholesterol levels. Whether apoA-I(M) may impart a "gain of function" in atherosclerosis protection compared to wild-type apoA-I is hotly debated. To address this question, knock-in mice expressing human apoA-I or apoA-I(M) were crossed with atherosclerosis-susceptible mice expressing the human apoB/A-II transgene (h-B/A-II/A-I(Hu/Hu) and h-B/A-II/A-I(M)(Hu/Hu)). On a chow diet, h-B/A-II/A-I(M)(Hu/Hu) mice were characterized by low HDL cholesterol levels compared to h-B/A-II/A-I(Hu/Hu) mice (35.65+/-8.00 mg/dl versus 58.09+/-13.50mg/dl, respectively; p<0.005). Gender differences in response to high fat diet were observed in both h-B/A-II/A-I(M)(Hu/Hu) and h-B/A-II/A-I(Hu/Hu) lines. h-B/A-II/A-I(M)(Hu/Hu) females had higher total cholesterol levels compared to h-B/A-II/A-I(Hu/Hu) females (895.08+/-183.07 mg/dl versus 544.43+/-116.42 mg/dl; p<0.05) and developed larger atherosclerotic lesions (148,260+/-78,924 microm(2) versus 54,132+/-43,204 microm(2), respectively; p<0.05). On the contrary, no difference in mean lesion area was found between h-B/A-II/A-I(M)(Hu/Hu) and h-B/A-II/A-I(Hu/Hu) males (19,779+/-6,098 microm(2) versus 15,706+/-13,095 microm(2); p=0.685). Our data suggest that, in the atherosclerosis-susceptible human apoB/A-II mouse model, expression of the human apoA-I(M) gene does not have protective advantage over that of the apoA-I gene.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Parolini C,Chiesa G,Gong E,Caligari S,Cortese MM,Koga T,Forte TM,Rubin EMdoi
10.1016/j.atherosclerosis.2005.03.008keywords:
subject
Has Abstractpub_date
2005-12-01 00:00:00pages
222-9issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(05)00209-1journal_volume
183pub_type
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