Endoplasmic Reticulum Stress and Disease

The endoplasmic reticulum is the cell's primary site for folding secreted and membrane proteins, and when that folding machinery becomes overwhelmed — by nutrient deprivation, viral infection, or accumulated mutations — the cell mounts a coordinated response called the unfolded protein response, or UPR. Researchers study how the three main UPR signaling branches sense misfolded proteins and toggle between protective adaptation and the decision to trigger cell death, a balance that turns out to be disrupted in conditions ranging from type 2 diabetes and fatty liver disease to Alzheimer's, Parkinson's, and multiple cancers. A central open question is why chronic, low-level ER stress tends to tip cells toward apoptosis rather than recovery, and how oxidative stress and inflammation amplify that shift. Answering this matters practically because several UPR components — including the kinase IRE1α and the transcription factor ATF6 — are now being evaluated as drug targets, with the hope that fine-tuning the response could either protect vulnerable neurons or sensitize tumor cells to death.

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Keywords

Endoplasmic ReticulumStressUnfolded Protein ResponseER StressCell DeathProtein Folding