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Updated: Sep 3, 2025

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics

A Model Membrane Platform for Reconstituting Mitochondrial Membrane Dynamics

Published on: September 2, 2020

Mitochondrial surface coating with artificial lipid membrane improves the transfer efficacy.

Takafumi Nakano^1,2, Yoshihiko Nakamura¹, Ji-Hyun Park¹

¹Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129, USA.

Communications Biology

|July 25, 2022

Summary

Coating extracellular mitochondria with a lipid membrane (AM-mito) enhances their uptake and neuroprotective effects. This improved mitochondrial allograft strategy shows promise for treating central nervous system injuries and diseases.

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Area of Science:

Neuroscience
Cell Biology
Biotechnology

Background:

Extracellular mitochondria function as signaling molecules for cellular energy balance.
Mitochondrial allografting shows potential for treating central nervous system (CNS) injuries but faces challenges in cellular uptake and efficacy.

Purpose of the Study:

To enhance mitochondrial transfer and therapeutic efficacy by coating isolated mitochondria with a cationic lipid membrane.
To evaluate the effectiveness of artificial membrane-coated mitochondria (AM-mito) in vitro and in vivo.

Main Methods:

Mitochondria were coated with DOTAP/DOPE using a modified inverted emulsion method.
Characterization of AM-mito included FACS analysis and zeta-potential measurements.
Assessment of mitochondrial integrity and function (protein levels, membrane potential).
Evaluation of AM-mito neuroprotection in cultured neurons and in a mouse model of focal cerebral ischemia-reperfusion.

Main Results:

Approximately 86% of mitochondria were successfully coated with the DOTAP/DOPE membrane.
AM-mito exhibited a positive surface charge and maintained key mitochondrial proteins and membrane potentials.
Coating significantly improved mitochondrial internalization and neuroprotection in cultured neurons.
Intravenous infusion of AM-mito post-ischemia enhanced cerebroprotection in vivo.

Conclusions:

Surface coating of mitochondria with an artificial lipid membrane is a feasible strategy.
AM-mito demonstrates improved cellular uptake and therapeutic efficacy compared to uncoated mitochondria.
This approach holds potential for advancing mitochondria-based therapies for CNS disorders.