COMPARATIVE CLINICAL AND TRANSCRIPTOMAL PROFILES OF BREAST CANCER BETWEEN FRENCH AND SOUTH MEDITERRANEAN PATIENTS SHOW MINOR BUT SIGNIFICATIVE BIOLOGICAL DIFFERENCES.
Nasséra Chalabi, Dominique J. Bernard-Gallon, Yves-Jean Bignon; Breast Med Consortium, Fabrice Kwiatkowski, Marie Agier, Véronique Vidal, Valérie Laplace-Chabaud, Valérie Sylvain-Vidal, Vincent Bertholet, Françoise De Longueville, Marc Lacroix, Guy Leclercq, José Remacle, Catherine Sibille, Nathalie Zammateo, Noureddine Ben Jaafar, Abdelaziz Sefiani, Karim Ouldim, André Mégarbané, Nadine Jalkh, Wejdène Mahfoudh, Wafa Troudi, Amel Ben Ammar-El Gaïed, Lotfi, Chouchane
Cancer Genomics & Proteomics (2008) 5, 253-261
BACKGROUND: In Western countries, breast cancer incidence and mortality are higher than in Mediterranean countries. These differences have been ascribed to environmental factors but also to late-stage diagnostic and biological specific characteristics. PATIENTS AND METHODS: Between September 2002 and September 2005, we collected clinical data by phone counselling 180 French and Mediterranean breast cancer patients and performed microarray experiments. RESULTS: Characteristics of breast cancer in patients from Lebanon, Tunisia and Morocco were more aggressive (more SBR grade III and positive node invasion) and patients were 10 years younger at diagnosis. Sixteen differentially expressed genes such as MMP9, VEGF, PHB1, BRCA1, TFAP2C, GJA1 and TFF1 were also found. Additionally, an up-regulation of cytokeratins KRT8 and KRT18 may indicate a luminal B subtype in "South" (Lebanon, Tunisia and Morocco) tumors while "North" (France) tumors may more frequently be luminal A type. CONCLUSION: This study allowed the identification of specific clinical and transcriptomic parameters in patients from South Mediterranean countries.
Affiliation of Marc Lacroix
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