In February 2025, what was the protein isoform '1N4R tau' identified by the University of Cologne being explored for?

Correct option is C

The correct answer is (c) Treating Alzheimer’s disease

Explanation:

• In February 2025, researchers at the University of Cologne identified the 1N4R isoform of the tau protein as a key factor in the pathogenesis of Alzheimer’s disease.
• Using human induced pluripotent stem cells (iPSCs), the team demonstrated that this specific tau variant mediates the toxic effects of protein clumps in human brain cells, contributing to neuronal dysfunction.
• The study, published in the journal Alzheimer's & Dementia, suggests that targeting the 1N4R tau isoform could offer a novel therapeutic approach for treating Alzheimer's disease.

Information Booster:

• Tau proteins are microtubule-associated proteins that stabilize microtubules in neurons.
• In Alzheimer's disease, tau becomes hyperphosphorylated and forms neurofibrillary tangles, disrupting neuronal function.
• The 1N4R isoform is characterized by having four microtubule-binding repeat regions and one N-terminal insertion, making it relevant for studying tauopathies.
• The research utilized CRISPR/Cas9 gene editing and live-cell imaging to study the effects of different tau isoforms in neurons.