Reverse modulation of the HDL anionic peptide factor and phospholipid transfer protein activity in coronary artery disease and type 2 diabetes mellitus.
OBJECTIVE
The high density lipoprotein Anionic Peptide Factor (HDL(3)-APF) was previously described as an apolipoprotein that promotes the reverse cholesterol transport. Since phospholipid transfer protein (PLTP) is involved in such mechanism we attempted to focus on the two APF and PLTP proteins.


METHODS
We recruited 56 type 2 diabetic patients with (n=36) or without (n=20) coronary artery disease (CAD) and 19 CAD patients. The three groups were compared to 39 healthy control subjects. In all groups, lipid profile was determined and plasma APF concentrations and PLTP activity were measured.


RESULTS
In all patients, the PLTP activity was significantly increased in comparison with controls (p<0.01), in concomitance with a plasma APF level decrease in groups with CAD (with and without type 2 diabetes) (p<0.01). Multiple linear regression analysis demonstrated that, when apoA-I, HDL-C, HDL-phospholipids and PLTP activity were taken into account as independent variables (after univariate regression analysis), HDL-PL was positively and independently related to APF (p<0.0001 in whole population; p=0.0090 in controls) and PLTP activity was negatively and independently related to APF in whole population and all patients' groups (all p<0.05), but positively and independently associated to APF in controls (p=0.0005).


CONCLUSIONS
APF could be considered as a specific marker against CAD and type 2 diabetes mellitus and our results confirm the atherogenic behavior of PLTP in CAD. Thus, these two proteins are likely to be regulated in a reverse manner.
Attia
Nebil
N
Laboratoire de Biochimie, UR Nutrition et Désordres Métaboliques Faculté de médecine, Monastir, Tunisia. Nabil.Attia@fsb.rnu.tn
Domingo
Nicole
N
Lorec
Anne-Marie
AM
Nakbi
Amel
A
Hammami
Sonia
S
Ben Hamda
Khaldoun
K
Portugal
Henri
H
Lairon
Denis
D
Hammami
Mohamed
M
Chanussot
Françoise
F
D000328:Adult; D000368:Aged; D001059:Apoproteins / Q000378:metabolism*; D002135:Calcium-Binding Proteins / Q000378:metabolism*; D003324:Coronary Artery Disease / Q000378:metabolism*; D003924:Diabetes Mellitus, Type 2 / Q000378:metabolism*; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D008875:Middle Aged; D049294:Phospholipid Transfer Proteins / Q000378:metabolism*
D001059:Apoproteins; D002135:Calcium-Binding Proteins; D049294:Phospholipid Transfer Proteins; C489588:anionic polypeptide fraction, human