Pancreatic and duodenal homeobox 1 (PDX1) and Baculoviral inhibitor of apoptosis repeat-containing 5 (BIRC5) (PDX1 and BIRC5)

PDX1 and BIRC5 are two distinct human proteins. Pancreatic and duodenal homeobox 1 (PDX1) is a homeodomain transcription factor essential for pancreatic organogenesis, beta-cell maturation, and maintenance of insulin-producing beta-cell identity and function. It also regulates genes essential for beta-cell activity and is critical in development of the duodenum. Inactivation causes pancreatic agenesis, and mutations are linked with diabetes, notably MODY4. PDX1 functions as a tumor suppressor in the stomach and may be a regenerative medicine target for diabetes. Baculoviral inhibitor of apoptosis repeat-containing 5 (BIRC5, survivin) is an intracellular protein that inhibits apoptosis and regulates cell division. It is minimally expressed in most normal adult tissues but is highly overexpressed in nearly all major human cancers, contributing to tumor cell survival and therapy resistance. Several experimental drugs are in development for targeting BIRC5 in cancer.

Other names

Insulin promoter factor 1IPF1SurvivinApoptosis inhibitor survivin

For PDX1, drugs/interventions aim to modulate PDX1 activity to promote beta-cell differentiation or reduce beta-cell loss. For BIRC5, small molecules (e.g., YM155) suppress BIRC5 transcription or disrupt survivin protein-protein interactions; antisense oligonucleotides and siRNA degrade BIRC5 mRNA or block translation, leading to apoptosis in cancer cells.