title: Apolipoprotein A1 -75 G/A and +83 C/T polymorphisms: susceptibility and prognostic implications in breast cancer.
abstract: Apolipoprotein A1 (ApoA1) is the major apoprotein constituent of high-density lipoprotein that can play important roles in tumor invasion and metastasis. In the current report, we evaluated the role of the functional ApoA1 polymorphisms (-75 G/A and +83 C/T) as genetic markers for breast cancer susceptibility and prognosis. We used the polymerase chain reaction and restriction enzyme digestion (RFLP-PCR) to characterize the variations of the ApoA1 gene in 295 unrelated Tunisian patients with breast carcinoma and 197 healthy control subjects. No association was found between the +83 C/T genetic variation in ApoA1 gene and the risk of breast cancer occurrence. The presence of the (+83) T allele appeared however to be associated with an increased risk of lymph node metastasis occurrence (OR = 2.94; P = 0.01). Furthermore, a positive association was found between ApoA1 -75 A allele carriers and breast cancer risk (OR = 1.57; P = 0.02). Regarding prognostic indicators, a significant association was found between ApoA1 (-75) A allele carriers and the premenopausal status of breast cancer patients (OR = 1.73; P = 0.03). Additionally, the presence of the -75 A allele was correlated with the oestrogen receptor status among premenopausal women (OR = 2.45; P = 0.02). This is the first report on the studies of ApoA1 single nucleotide polymorphisms (SNPs) in breast carcinomas. Our data suggest that these genetic variations of ApoA1 may represent a marker for the increased risk of breast cancer.
authors.affiliation: Faculté de Médecine de Monastir, Laboratoire d'Immuno-Oncologie Moléculaire, 5019 Monastir, Tunisia.
authors.forename: Bechr
authors.initials: B
authors.lastname: Hamrita
authors.forename: Hela
authors.initials: H
authors.lastname: Ben  Nasr
authors.forename: Sallouha
authors.initials: S
authors.lastname: Gabbouj
authors.forename: Noureddine
authors.initials: N
authors.lastname: Bouaouina
authors.forename: Lotfi
authors.initials: L
authors.lastname: Chouchane
authors.forename: Karim
authors.initials: K
authors.lastname: Chahed
mesh_terms: D000368:Aged; D016632:Apolipoprotein A-I / Q000235:genetics*; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D020022:Genetic Predisposition to Disease; D006801:Humans; D008593:Menopause / Q000235:genetics; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011379:Prognosis; D011960:Receptors, Estrogen / Q000235:genetics
chemical_list: C505693:APOA1 protein, human; D016632:Apolipoprotein A-I; D011960:Receptors, Estrogen