Mouse monoclonal primary
GATA3 Monoclonal Antibody (EM1902-34)
Synthetic peptide within n-terminal human foxa1.
MCF-7 cell lysates, MCF-7.
Store at +4Á¾ after thawing. Aliquot store at -20Á¾. Avoid repeated freeze / thaw cycles.
1*TBS (pH7.4), 0.2% BSA, 50% Glycerol. Preservative: 0.05% Sodium Azide.
Protein G affinity purified.
Predicted band size: 49 kDa.
Forkhead box protein A1 (FOXA1), also known as hepatocyte nuclear factor 3-alpha (HNF-3A), is a protein that in humans is encoded by the FOXA1 gene. FOXA1 is a member of the forkhead class of DNA-binding proteins. These hepatocyte nuclear factors are transcriptional activators for liver-specific transcripts such as albumin and transthyretin, and they also interact with chromatin as a pioneer factor. Similar family members in mice have roles in the regulation of metabolism and in the differentiation of the pancreas and liver. FOXA1 in breast cancer is highly correlated with ER_ç+, GATA3+, and PR+ protein expression as well as endocrine signaling. FOXA1 acts as a pioneer factor for ERa in ER_ç+ breast cancer, and its expression might identify ER_ç+ cancers that undergo rapid reprogramming of ERa signaling that is associated with poor outcomes and treatment resistance. Conversely, in ER_ç? breast cancer FOXA1 is highly correlated with low-grade morphology and improved disease free survival. FOXA1 is a downstream target of GATA3 in the mammary gland. Expression in ER_ç? cancers may identify a subset of tumors that is responsive to other endocrine therapies such as androgen receptor antagonist treatment.