Polymorphic variants of NFKB1 and its inhibitory protein NFKBIA, and their involvement in sporadic breast cancer.

Nuclear factor kappa-beta (NF-kappaB) is a transcription factor responsible for modulating the expression of many genes involved in cell proliferation, differentiation, apoptosis and metastasis. NF-kappaB interacts with IkappaB inhibitory proteins to regulate gene expression. This study investigated common variants within the genes coding for NF-kappaB and IkappaB, NFKB1 and NFKBIA, for involvement in sporadic breast cancer. Genotypes were determined in a population of breast cancer affected individuals and age-matched controls. Results do not support an involvement of the tested NFKB1 and NFKBIA polymorphisms in susceptibility to sporadic breast cancer, in the tested Caucasian population.