Abstract
In the absence of their cognate ligand, dependence receptors trigger programmed cell death. This function is the defining feature of dependence receptors, which include members of several different protein families. The integrins are a family of heterodimeric receptors for extracellular matrix (ECM) proteins, mediating cell anchorage and migration. Integrins share characteristics with dependence receptors, and integrin binding to substrate ECM ligands is essential for cell survival. Although integrins do not conform in all characteristics to the established definitions of dependence receptors, alterations in the expression of integrins and their ligands during physiological and pathological events, such as wound healing, angiogenesis and tumorigenesis, do regulate cell fate in a ligand-dependent manner. This biosensory function of integrins fits well with our current concept of dependence receptor action, and thus integrins may rightly be considered to comprise a distinct subclass of dependence receptor.
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Abbreviations
- ECM:
-
extracellular matrix
- IMD:
-
integrin-mediated death
- DCC:
-
deleted in colon cancer
- RET:
-
rearranged during transfection
- UNC5H:
-
uncoordinated-5 homolog
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Stupack, D. Integrins as a distinct subtype of dependence receptors. Cell Death Differ 12, 1021–1030 (2005). https://doi.org/10.1038/sj.cdd.4401658
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