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Mitochondrial Membranes

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...

The Inner Mitochondrial Membrane

The Inner Mitochondrial Membrane

The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria. In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...

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Updated: Jan 12, 2026

Micropatterning and Assembly of 3D Microvessels

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

Surface-Engineered Mitochondria with Targeting Potential for Endothelial Repair.

Brandon Applewhite^1,2,3, Natalia Matiuto^4,3, Aurea Del Carmen^4,3

¹Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL USA.

Cellular and Molecular Bioengineering

|November 4, 2025

Summary

This summary is machine-generated.

Surface-engineered mitochondria show improved delivery and function for vascular repair. This novel approach enhances cellular uptake and restores bioenergetics in damaged endothelium, paving the way for cell-free therapeutics.

Keywords:

Bioenergetic restoration Endothelial dysfunction Lipid-polymer coatings Mitochondrial transplantation Surface engineering Vascular regeneration

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Related Experiment Videos

Last Updated: Jan 12, 2026

Micropatterning and Assembly of 3D Microvessels

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

Generation and Grafting of Tissue-engineered Vessels in a Mouse Model

Generation and Grafting of Tissue-engineered Vessels in a Mouse Model

Published on: March 18, 2015

Isolation of Murine Adipose Tissue-derived Microvascular Fragments as Vascularization Units for Tissue Engineering

Isolation of Murine Adipose Tissue-derived Microvascular Fragments as Vascularization Units for Tissue Engineering

Published on: April 30, 2017

Area of Science:

Biomedical Engineering
Cell Biology
Vascular Biology

Background:

Mitochondrial dysfunction is a key factor in endothelial injury associated with vascular diseases.
Current mitochondria transplantation methods lack specificity, efficient uptake, and long-term retention.
Developing targeted endothelial repair strategies is crucial for treating vascular conditions.

Purpose of the Study:

To engineer mitochondria for enhanced delivery to the vascular endothelium.
To improve the specificity, uptake, and retention of transplanted mitochondria.
To establish a foundation for novel cell-free therapeutics for vascular repair.

Main Methods:

Isolated mitochondria from induced pluripotent stem cell-derived mesenchymal stem cells (iPSC-MSCs).
Surface-functionalized mitochondria using a DSPE-PEG coating platform with VCAM-1 and collagen-binding peptides for targeted delivery.
Assessed mitochondrial characteristics, cellular uptake, retention, and function in human diabetic aortic endothelial cells (DAECs).

Main Results:

Surface functionalization significantly enhanced mitochondrial uptake in DAECs compared to uncoated mitochondria.
Engineered mitochondria exhibited increased cytoplasmic retention and colocalization with the host mitochondrial network.
Recipient cells showed improved mitochondrial membrane potential and sustained oxygen consumption, indicating restored bioenergetic function.

Conclusions:

Demonstrated a proof-of-concept for surface-engineered mitochondria to improve transplantation to damaged endothelium.
Surface engineering enhances cellular uptake and bioenergetic restoration in recipient endothelial cells.
These findings support the development of adaptable, cell-free therapeutics for vascular disease treatment.