Mitochondria hand protons to lysosomes: a new acidification pathway that fails with age

By Agewell Brief Editorial Desk · Published June 18, 2026 at 8:00 a.m. EDT

Original reporting: Mitochondria-lysosome coupling contributes to lysosome acidification and aging.

On the frontier: Regeneration, Quantum biology

A conserved mechanism shows mitochondrial proton export via membrane contacts drives lysosomal acidification; aging disrupts this coupling, but engineered links restore it.

Three things to remember

Mitochondria-lysosome contacts transfer protons to acidify lysosomes.
Aging disrupts contacts, causing lysosomal de-acidification and senescence.
Restoring contacts reverses senescence and restores autophagic flux.

Source

This signal is based on Mitochondria-lysosome coupling contributes to lysosome acidification and aging. from PubMed. Read the original report for full context.

Health note: Basic science study; not yet a clinical therapy.

Pioneer Lineage · Historical Precursors

Scientific Precursors & Foundational Discoveries

1955 Christian de Duve

Discovered lysosomes as membrane-bound organelles containing acid hydrolases, and established that their internal acidic pH (maintained by a proton pump) is essential for degradation. This work laid the foundation for understanding lysosomal acidification as a critical cellular process, which the preprint now shows is coupled to mitochondrial proton export via membrane contacts.

1961 Peter Mitchell

Proposed the chemiosmotic theory, explaining that the mitochondrial electron transport chain pumps protons out of the mitochondrial matrix to create an electrochemical gradient. The preprint extends this by showing that these protons can be directly transferred to lysosomes/vacuoles through membrane contacts, providing a new source of protons for lysosomal acidification beyond the traditional cytosolic pool.

Three things to remember

Source

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