31 December 1969
Does alpha-1-proteinase inhibitor play a protective role in coronary atherosclerosis?
Donatas Stakisaitis, Vytautas Basys, Rimantas BenetisMed Sci Monit 2001; 7(4): CR701-711 :: ID: 421082
Abstract
BACKGROUND: alpha-1-proteinase inhibitor (alpha-1-PI) might appear to be actively involved in atherogenesis as an important regulator protecting elastic tissue from damage by proteinases as well as lipid accumulation in arterial wall.
MATERIALS AND METHODS: alpha-1-PI genetic variants were examined in 156 male coronary atherosclerosis patients (mean age 49+/-9 years). The frequency of alpha-1-PI phenotypes was determined in 1577 healthy individuals. Also, 108 long-survivors (mean age 92.7+/-4.3 years) were investigated for alpha-1-PI phenotype. The serum level of alpha-1-PI was examined in 43 coronary atherosclerosis patients (mean of age 49.6+/-8.1 years) and in different age groups of healthy males. A correlations between seruma-1-PI concentration and apoB, and apoA-1 were calculated. Relationship between serum alpha-1-PI and apolipoprotein B/apolipoprotein A-1 (apoB/apoA-1) ratio was determined. Isoelectric focusing of alpha-1-PI phenotypes was performed on thick polyacrylamide gels with ampholytes pH 3.5-5.0, 4.5-6.5 and 4.2-5.0. A quantitative assessment of alpha-1-PI, apoB and apoA-1 was performed by ELISA method using antibodies against human alpha-1-PI, apoB and apoA-1.
RESULTS: The phenotype PI ZZ of alpha-1-PI associated with a severe congenital deficiency of alpha-1-PI in patients and long-lived subjects was not found. In population this phenotype (0.06%) as well as PI SS phenotype (0.06%) was detected once. No significant difference was found in the frequency of PI*M, PI*S and PI*Z genes in the coronary atherosclerosis group and population. The PI*Z gene was significantly more frequent in patients with coronary atherosclerosis than in long-survivors (P<0.01). The correlation between blood serum (-1-PI concentration and age in the control group of males was significant (r=Ð0.83, P<0.01). The a-1-PI concentration was found significantly higher in coronary atherosclerosis patients compared with control (2.14±0.6 and 1.68±0.3 g/l respectively, P<0.05). The a-1-PI concentration was found to dependent on the apoB/apoA-1 ratio: it was higher in patients having apoB/apoA-1>1.0 than in patients with apoB/apoA-1<1.0 (2.4±0.6 and 2.04±0.5 g/l respectively, P<0.05). There was a significant correlation between a-1-PI concentration and apoB/apoA-1 ratio in blood serum of patients suffering from coronary atherosclerosis (r=0.25, P<0.05).
CONCLUSIONS: Derangements in the homeostasis of proteinase-antiproteinase system could be involved in destruction of the arterial wall connective tissue. The local as well as systemic inactivation of a-1-PI in atherosclerosis process could be related with hyperlipidemia. Investigation of long-survivors support the suggestion that they are important antiatherogenic control group for evaluating the role of genetic determinants in atherogenesis. Congenital (a-1-PI deficiency, hyperlipidemia) and acquired (related to smoking, aging) imbalance of proteinase-antiproteinase system is considered to one of the atherogenic factors. Authors discuss the possible mechanisms of atherogenesis related with imbalance of proteinase-antiproteinase system.
Keywords: a-1-proteinase inhibitor, Aging, dysapolipoproteinaemia, atherogenesis
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About Med Sci Monit

eISSN: 1643-3750
Medical Science Monitor (MSM) established in 1995 is an international, peer-reviewed scientific journal which publishes original articles Clinical Medicine and related disciplines.
Categories
Archives MSM
- Volume 27, 2021
- Volume 26, 2020
- Volume 25, 2019
- Volume 24, 2018
- Supplement 1
- More...
- Volume 23, 2017
- Volume 22, 2016
- Volume 21, 2015
- Volume 20, 2014
- Volume 19, 2013
- Volume 18, 2012
ISI Journals
Publisher
International Scientific Information, Inc.
150 Broadhollow Rd., Suite 114
Melville, NY, 11747 | USA
phone:
+1.631.470.9640
e-mail:
[email protected]
www:
www.isi-science.com
Information
Copyright © 2022
International Scientific Infromation, Inc.
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About Med Sci Monit

eISSN: 1643-3750
Medical Science Monitor (MSM) established in 1995 is an international, peer-reviewed scientific journal which publishes original articles Clinical Medicine and related disciplines.
Publisher
International Scientific Information, Inc.
150 Broadhollow Rd., Suite 114
Melville, NY, 11747 | USA
phone:
+1.631.470.9640
e-mail:
[email protected]
www:
www.isi-science.com
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