Biomimetic human small muscular pulmonary arteries

Area of Science:

• Biomedical Engineering
• Vascular Biology
• Regenerative Medicine

Background:

• Pulmonary hypertension pathophysiology involves changes in small muscular arteries.
• Existing in vitro models fail to accurately replicate human microvascular structure and microenvironment.
• Need for advanced models to study human microvascular diseases.

Purpose of the Study:

• To biofabricate anatomically mimetic in vitro models of human pulmonary arterial microvessels.
• To create a platform for investigating microvascular pathobiology in human diseases like pulmonary hypertension.

Main Methods:

• Parallel biofabrication of photopatterned, self-rolled biomimetic microvessels.
• Incorporation of aligned human smooth muscle cells, extracellular matrix, and endothelial cells.
• Computational image processing for high-resolution 3D imaging of cellular and protein structures.

Main Results:

• Successfully created tunable-sized microvessels with accurate anatomical layering and patterning.
• Demonstrated increased endothelial cell longevity and nitric oxide production in the engineered vessels.
• Achieved precise 3D spatial positioning of multiple cellular and matrix constituents.

Conclusions:

• A novel biofabrication approach enables engineering of biomimetic human microvessels.
• This platform provides an improved model for studying pulmonary hypertension and other microvascular diseases.
• The technology offers a new paradigm for creating complex, multicellular engineered tissues.