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Hsp70-2 gene polymorphism: susceptibility implication in Tunisian patients with coronary artery disease

Mohamed Yahia Hrira12*, Latifa Chkioua12, Afef Slimani3, Henda Chahed12, Habib Mosbah4, Hamda Ben Khaldoun5, Salima Ferchichi12, Faouzi Addad5 and Abdelhedi Miled12

Author Affiliations

1 Laboratory of Biochemistry CHU Hached, Sousse, Tunisia

2 Research Unit 07/UR/06, Faculty of Pharmacy, Monastir, Tunisia

3 Unit of Research, Genetic and Biologic Factors of Atherosclerosis, Faculty of Medicine, Monastir, Tunisia

4 Laboratory of Biochemistry and Enzyme Engineering of Lipases, ENIS Sfax, Tunisia

5 Department of Cardiology, CHU Fattouma Bourguiba, Monastir, Tunisia

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Diagnostic Pathology 2012, 7:88  doi:10.1186/1746-1596-7-88

Published: 26 July 2012


Coronary artery disease (CAD) is a multifactorial disease where genetic and environmental factors interact in complex ways to cause the disease. Heat shock protein genes are involved in the progress of CAD. This implies that genetic variants of Hsp70–2 genes might contribute to the development of the CAD.

The aim of this study was to characterize statistical correlation of linkage between lipid profiles, polymorphism PstI site of Hsp70–2 gene and CAD.

This study was carried out on Tunisian patients with CAD recruited from Hospital of Fattouma Bourguiba of Monastir-Tunisia. Polymerase chain reaction and restriction enzymes were used to determine the genotypic distributions in 252 unrelated patients and 151 healthy control subjects. Further, ApoA-I and ApoB as well as the serum total of cholesterol, HDL, triglyceride, and hs-CRP levels were measured.

We showed a decreased level of ApoA-I, whereas the levels of each of ApoB and hs-CRP were increased in patients with CAD compared with control group. In addition our studies of a polymorphic PstI site of Hsp70-2 gene at position 1267 of the Hsp70–2 gene have revealed that the allelic frequency of P2 was significantly more frequent in CAD patients than controls group (p=0.007, OR=1.495). The genotypic distribution showed a high incidence of P2/P2 genotype in CAD patients (0.190) compared to healthy control (0.009) with reach significant difference (p=0.006). The P2 carriers showed a significantly increased of Total-Cholesterol (CT) and C-reactive protein (hs-CRP) levels in CAD patients (p=0.008 and p=0.018, respectively).

The high incidence of P2-Hsp70-2 genotype in CAD patients and the significantly association of P2/P2 genotype with elevated Total Cholesterol and hs-CRP levels, supported that P2–Hsp70–2 genotype has susceptibility implication in CAD and could increased the risk of CAD in Tunisian population.

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Coronary artery disease; Hsp70-2 genes; Polymorphism; Tunisian patients