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.
Apolipoprotein A-I and the molecular variant apoA-I Milano : evaluation of the antiatherogenic effects in a knock-in mouse model / C. Parolini, G. Chiesa, E. Gong, S. Caligari, M.M. Cortese, T. Koga, T.M. Forte, E.M. Rubin. - In: ATHEROSCLEROSIS. - ISSN 0021-9150. - 183:2(2005), pp. 222-229.
|Titolo:||Apolipoprotein A-I and the molecular variant apoA-I Milano : evaluation of the antiatherogenic effects in a knock-in mouse model|
PAROLINI, CINZIA (Primo)
CHIESA, GIULIA MARIA (Secondo)
|Parole Chiave:||Apolipoprotein A-I; Atherosclerosis; Gene knock-in; HDL cholesterol; Mouse model|
|Settore Scientifico Disciplinare:||Settore BIO/14 - Farmacologia|
|Data di pubblicazione:||2005|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.atherosclerosis.2005.03.008|
|Appare nelle tipologie:||01 - Articolo su periodico|