HMGB1 silence could promote MCF-7 cell apoptosis and inhibit invasion and metastasis.

High mobility group box 1 (HMGB1), a non-histone nuclear protein, was associated with a variety of biological important processes, such as transcription, differentiation, extracellular signaling. As a cytokine or inflammatory mediator, more and more data showed that HMGB1 was involved in inflammatory diseases, cancers or autoimmune disease. However, few data focused on nucleic or cytoplasmic function of HMGB1. Therefore, the present study focused on cancer cells biological characteristics following HMGB1 silence. HMGB1 siRNAs were designed and chemically synthesized, and then transfected into the breast cancer cell line MCF-7 with lipofectamine 2000. The transcription and translation level of HMGB1 expression, proliferation, apoptosis, migration of MCF-7 were determined. The results demonstrated that HMGB1 silence inhibit invasion and migration and promote apoptosis of human breast cells; which indicated that HMGB1 silence might be a potential therapy targets.