Quality Control - GoKawiil

Study details GRP75-driven SIMPA structures in mitochondrial quality control

Researchers used fluorescence imaging in U-2OS and HeLa cells to show that stress-induced mitochondrial structures called SIMPA form under multiple conditions, including hydrogen peroxide exposure, heat shock, photoactivation of an AIE dye, MitoTracker Red staining, and inhibition of the mitochondrial respiratory chain with agents like Rotenone and Antimycin A. The experiments showed SIMPA formation scales with stress dose, with larger and more numerous aggregates appearing as stimulus intensity increased across each model tested.

nature.com · 2026-10-21

PsychAD study builds cell-type gene expression models from over 6 million brain nuclei

Researchers from the PsychAD consortium describe training single-nucleus transcriptomic imputation models (snTIMs) using single-nucleus RNA sequencing data from more than 6 million nuclei drawn from brain tissue of 1,494 donors. The work involved dividing donors into ancestry groups, harmonizing genotype data across multiple sequencing and array platforms, and building ancestry-specific reference panels to align training and target cohorts, including data from the Million Veteran Program.

nature.com · 2026-09-23

Study highlights gap between AI-using and AI-avoiding employees at work

New workplace research identifies a growing performance split between employees who actively use AI tools and those who avoid them. High performers reportedly rely on specific strategies to weave AI into daily tasks—covering automation, tool choice, and quality checks—without sacrificing accuracy or independent judgment.

fastcompany.com · 2026-09-21

RNF213 enzyme found to tag defective glycogen for cellular disposal

Researchers identified RNF213, an E3 ubiquitin ligase, as a key surveillance mechanism that marks poorly branched, disease-causing glycogen (polyglucosan) for destruction via autophagy. Mice lacking RNF213's ligase activity built up polyglucosan deposits in the cerebellum, pons, and hippocampus, and cell studies showed the enzyme selectively ubiquitylates abnormal glycogen while a structural domain restrains it from attacking healthy glycogen. Once tagged, the aberrant glycogen recruits autophagy receptors SQSTM1, TAX1BP1, and optineurin, which shuttle it into autophagosomes for clearance.

nature.com · 2026-09-15