XBP-1 (X-box binding protein 1) is a transcription factor that plays a crucial role in the unfolded protein response (UPR).
XBP-1 is activated in response to endoplasmic reticulum (ER) stress, which occurs when the ER is overwhelmed with unfolded or misfolded proteins.
XBP-1 has been shown to have both tumor-promoting and tumor-suppressing roles.
XBP-1 is overexpressed in various types of cancer, including breast, lung, colon, and pancreatic cancer. In some cases, XBP-1 overexpression has been associated with poor prognosis and reduced survival rates.
Targeting XBP-1 and the UPR has been proposed as a potential therapeutic strategy for cancer treatment. Inhibitors of XBP-1 or other UPR components may be able to selectively kill cancer cells that are under ER stress, while sparing normal cells.
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