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Maria Stella Graziani

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Giuseppe Agosta

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ISSN print: 0393 – 0564
ISSN digital: 0392- 7091

BC: Articoli scritti da A. Caruso

Polimorfismo I/D del gene per l’enzima di conversione dell’angiotensina (ACE): gene della longevità o fattore di rischio nella patologia ipertensiva?
Polymorphism of the angiotensin converting enzyme gene: longevity gene or risk factor in hypertensive disease?
<p>In recent decades, the increase in life expectancy stimulated the study of aging processes and the search for&nbsp;candidate genes involved in longevity. The angiotensin converting enzyme (ACE), present in all endothelial cells, plays&nbsp;an essential role in maintaining the homeostasis of blood flow by regulating the production of the vasoconstrictor&nbsp;angiotensin II and inactivating the bradykinin. Some studies reported a possible association between the polymorphism&nbsp;I/D of ACE gene and either hypertension and longevity. The present study was aimed to confirm these data. We studied&nbsp;two large cohorts of nonagenarians and centenarians. One was from Sardinia (200 subjects, 88 males, mean age: 96&nbsp;years) and their data were compared to a group of 222 subjects (106 males, mean age: 44 years) from the general&nbsp;population of the same geographic area. The latter group of longeve subjects (161 subjects, 71 males, mean age: 97&nbsp;years) was from Southern Italy. Furthermore, we studied 146 hypertensive patients (98 males, mean age: 51 years) and&nbsp;172 normotensive subjects (86 males, mean age: 33 years) from Southern Italy. The ACE I/D polymorphism was typed&nbsp;by polymerase chain reaction; the amplified 490 bp (allele I) and 190 bp (allele D) were visualized on 2% agarose gel.&nbsp;Hypertensive subjects had a significantly different distribution of ACE genotypes as compared to normotensive ones&nbsp;(P=0.001) and a higher frequency of the D/D genotype. Long-lived subjects from Sardinia showed a significantly different&nbsp;distribution of ACE genotypes as compared to subjects from the general population of the same geographic area (P&nbsp;&lt;0.001), to long-lived subjects from Southern Italy (P &lt;0.001), to hypertensive patients (P=0.011) and to normotensive&nbsp;subjects from Southern Italy (P &lt;0.001). Surprisingly, they had the highest frequency of the D/D genotype among the&nbsp;compared groups. Our study indicates that: i) centenarians of different ethnic origin have a different genetic background,&nbsp;ii) there is a possible association between longevity and allelic variants of ACE, even if only in specific ethnic groups (i.e.,&nbsp;Sardinian) and iii) ACE polymorphisms are a predisposing factor to hypertension.</p>
Biochimica Clinica ; 37(6) 461-464
Contributi scientifici - Scientific papers