Baculoviral IAP repeat-containing 5 (BIRC5) gene promoter (BIRC5 promoter)

The Baculoviral IAP repeat-containing 5 (BIRC5) gene promoter is a regulatory DNA sequence that controls the expression of survivin, a member of the inhibitor of apoptosis (IAP) protein family (Li and Altieri, 1999). Survivin plays a dual role in promoting cell survival by inhibiting apoptosis and regulating cell division during mitosis (Altieri, 2003). While the BIRC5 promoter is highly active during embryonic development, it is transcriptionally silent in most normal adult tissues but becomes reactivated in nearly all human cancers (Ambrosini et al., 1997). This tumor-specific activity makes the BIRC5 promoter an attractive target for cancer therapeutics, particularly for driving the expression of therapeutic suicide genes specifically within malignant cells (Kamizono et al., 2001). Small molecule inhibitors like sepantronium bromide (YM155) have been developed to suppress the activity of this promoter, thereby reducing survivin levels and inducing tumor cell death (Nakahara et al., 2007). Additionally, the promoter's activity and the resulting survivin expression serve as significant biomarkers for cancer progression and prognosis (Duffy et al., 2007). Therapeutic strategies also include using the promoter to drive the expression of viral genes in oncolytic virotherapy, ensuring viral replication is restricted to cancer cells (Ulasov et al., 2007). Despite its potential, challenges remain regarding the delivery of DNA-targeting agents and the potential for low-level activity in certain normal stem cell populations (Fukuda and Pelus, 2006).

Other names

Survivin promoterBIRC5 promoter DNAAPI4 promoterTIAP promoter

Transcriptional repression of the BIRC5 gene or tumor-specific activation of therapeutic transgenes in gene therapy constructs.