Expression profile of interleukin-6, 4-hydroxy-2-nonenal, and hypoxia-inducible factor 1-α in women with breast cancer and their association with clinicopathological parameters.

Introduction: Breast cancer (BC) is the most common malignancy in women worldwide, representing a major public health burden. Therefore, there is a need to identify circulating biomarkers for the early detection of BC and to facilitate the diagnosis. Interleukin-6 (IL-6), 4-hydroxy-2-nonenal (4-HNE), and hypoxia-inducible factor 1-α (HIF-1α) are biomarkers involved in the initiation and progression of this disease.