Cited by 27Cellular Mechanics and Interactions3D Printing in Biomedical ResearchHydrogels: synthesis, properties, applications

Microengineered 3D collagen gels with independently tunable fiber anisotropy and directionality

Open access
Ahmed, Adeel, Joshi, Indranil M., Larson, Stephen, Mansouri, Mehran, Gholizadeh, Shayan, Allahyari, Zahra, Forouzandeh, Farzad, Borkholder, David A. +2 more·2021·Advanced Materials Technologies

Published version of a preprint

Abstract

Abstract Cellular processes are linked to the alignment (anisotropy) and orientation (directionality) of collagen fibers (i.e., landscape) in the native extracellular matrix (ECM). Given the vital role that cell‐matrix interactions play in regulating biological functions, several microfluidic methods have successfully established anisotropic 3D collagen gels to develop quantitative relationships between structural cues and cellular responses. However, independently tailoring the fiber anisotropy and fiber directionality within a landscape remains a challenge. Here, a user‐friendly microfluidic platform with a non‐uniform channel geometry is used to control the degree of fiber anisotropy and directionality as a function of extensional strain rate and a defined flow path, respectively. New experimental capabilities, including independent control over the degree of fiber anisotropy and directionality, spatial gradients in anisotropy, and multi‐material interfaces, are demonstrated. A channel peel‐off technique provides direct access to the microengineered collagen landscapes, and the alignment of single MD‐MB‐231 cancer cells and monolayers of human umbilical vein endothelial cells (HUVEC) is shown. Finally, the platform's modular capability is highlighted by integrating an ultrathin porous Parylene (UPP) membrane onto the microengineered collagen landscape as a method to control the degree of cell‐matrix interaction.

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Crossref · 10.1002/admt.202001186

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  • ECM orientation can be achieved by providing directional forces during or after fibril polymerization, such as external strain, flow, or shear.

    “ECM orientation can be further achieved by providing directional forces during or after fibril polymerization, such as by external strain, flow, or shear [21,37,38].”

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  1. Aleman J., 2016, Tissue Eng. A, 22

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Authors
Ahmed, A., Joshi, I. M., Larson, S., Mansouri, M., Gholizadeh, S., Allahyari, Z., Forouzandeh, F., Borkholder, D. A., Gaborski, T. R., & Abhyankar, V. V.
Affiliations
Rochester Institute of Technology (US)
Corresponding author
Abhyankar, Vinay V.
Venue
Advanced Materials Technologies
Publisher
Wiley
Published
2021-03-10
Volume
6
Issue
4
ISSN
2365-709X (ISSN-L)
OpenAlex
W3135154129
Cited by
27
References
59
Citations by year
2026: 2 · 2025: 6 · 2024: 3 · 2023: 6 · 2022: 9 · 2021: 1
FWCI
2.48
Type
journal article
Language
en
Open access
Locations
  • Advanced Materials Technologies (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (R01DC014568, R35GM119623)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
  • Physical Sciences › Engineering › Biomedical Engineering › 3D Printing in Biomedical Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
Keywords
collagen gel, fiber anisotropy, extensional strain rate, cell alignment, human umbilical vein endothelial cells, extracellular matrix, cell-matrix interactions, multi-material interfaces

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