Scientists traced the stress alarm that triggers kidney cell explosion
Zhang H, Sun X, Shen Y, Li Y, Nie Z
Cellular Stress Response
Understanding how cells self-destruct under chemical stress has direct parallels in how plant cells respond to pesticide exposure and pollutant toxicity, research that underpins safer garden chemical use and crop protection strategies.
When certain medications damage the kidneys, a stress alarm protein switches on inside kidney cells and triggers a kind of explosive cell death that spreads inflammation. Scientists figured out the chain of signals that causes this and found two ways to shut it down: a small-molecule drug and tiny particles that silence the alarm gene. Both approaches dramatically reduced kidney damage in mice.
Key Findings
ATF4 was markedly upregulated in damaged kidney tubule cells in both human and mouse AKI models, and its deletion significantly reduced kidney dysfunction and inflammation.
ATF4 drives pyroptosis (inflammatory cell death) by activating the STAT1-GBP2 signaling axis, which then triggers NLRP3 inflammasome assembly.
Two therapeutic strategies, the ISR antagonist ERMT1 and engineered nanobiologics silencing ATF4 in tubule cells, both significantly reduced renal injury in preclinical models.
chevron_right Technical Summary
Researchers found that a stress-signaling protein called ATF4 drives kidney cell death and inflammation after drug exposure, and that blocking it with a new compound or gene-silencing nanoparticles significantly protected kidney function in mice.
Abstract Preview
Original paper
Integrated Stress Response and Drug-Induced Acute Kidney Injury: Involvement of Activating ATF4-STAT1-GBP2 Signaling.
Integrated stress response promotes drug-induced AKI. Activating transcription factor 4 promoted tubular epithelial cell pyroptosis in drug-induced AKI by activating signal transducer and activator...
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