Mitochondrial transfer emerges as a potential neurotherapeutic strategy for CNS disorders

Scientists are taking a closer look at one of the more surprising forms of cellular communication: mitochondria, the energy-producing compartments of cells, can move between cells. A new review published in Fluids and Barriers of the CNS examines how this intercellular mitochondrial transfer, along with direct mitochondrial transplantation, is being explored as a potential therapeutic strategy for injuries and diseases of the central nervous system.

The authors focus on what triggers mitochondrial transfer, the direction it takes, the routes it follows and the forms of the cargo itself.

According to the authors, intact, respiration-competent mitochondria are thought to restore metabolism, reduce oxidative stress and limit neuroinflammation in damaged nervous tissue. Damaged or fragmented cargo, by contrast, is non-functional and may instead act as a pro-inflammatory danger signal, potentially worsening injury rather than repairing it. This distinction between healthy and degraded cargo is central to the review’s framework.

Progress now depends less on proving whether mitochondrial transfer occurs than on clarifying how it occurs and how reliably and reproducibly it confers benefit. They highlight two methodological issues that underlie current interpretations of proposed neuroprotective mechanisms: susceptibility to dye-labeling artifacts and the scarcity of functional validation. Without rigorous functional testing of transferred mitochondria, the true significance of many reported observations remains uncertain.

Beyond the basic biology, the review surveys progress in preclinical research on mitochondrial transplantation and the few clinical studies conducted to date. The authors compare how donor sources are selected, which delivery routes are used, how doses are estimated and what bioengineering strategies are being developed. Safety considerations receive particular attention, with the aim of informing future clinical translation.

The publisher notes that this version is subject to further edits and will be replaced automatically by the final Version of Record.

Intercellular mitochondrial transfer is increasingly recognized as a form of cellular communication relevant to central nervous system injury, and the review summarizes progress in preclinical research on mitochondrial transplantation and the few clinical studies to date.

Subject of Research: Mitochondrial transfer and transplantation as potential neurotherapeutic strategies for central nervous system disorders

Article Title: Mitochondrial transfer and transplantation as emerging neurotherapeutic strategies for central nervous system disorders

Article References: Li, J., Zhang, M., Li, S., & Qu, Y. (2026). Mitochondrial transfer and transplantation as emerging neurotherapeutic strategies for central nervous system disorders. Fluids and Barriers of the CNS. https://doi.org/10.1186/s12987-026-00887-2

Image Credits: AI Generated

DOI: 10.1186/s12987-026-00887-2

Keywords: mitochondrial transfer, mitochondrial transplantation, central nervous system, neurovascular unit, neuroinflammation, transmitophagy, dye-labeling artifacts, functional validation, donor-source selection, delivery routes, bioengineering, clinical translation