Annals of Biomedical Engineering

, Volume 44, Issue 6, pp 2076–2089

Understanding the Role of ECM Protein Composition and Geometric Micropatterning for Engineering Human Skeletal Muscle

Emerging Trends in Biomaterials Research

DOI: 10.1007/s10439-016-1592-8

Cite this article as:
Duffy, R.M., Sun, Y. & Feinberg, A.W. Ann Biomed Eng (2016) 44: 2076. doi:10.1007/s10439-016-1592-8

Abstract

Skeletal muscle lost through trauma or disease has proven difficult to regenerate due to the challenge of differentiating human myoblasts into aligned, contractile tissue. To address this, we investigated microenvironmental cues that drive myoblast differentiation into aligned myotubes for potential applications in skeletal muscle repair, organ-on-chip disease models and actuators for soft robotics. We used a 2D in vitro system to systematically evaluate the role of extracellular matrix (ECM) protein composition and geometric patterning for controlling the formation of highly aligned myotubes. Specifically, we analyzed myotubes differentiated from murine C2C12 cells and human skeletal muscle derived cells (SkMDCs) on micropatterned lines of laminin compared to fibronectin, collagen type I, and collagen type IV. Results showed that laminin supported significantly greater myotube formation from both cells types, resulting in greater than twofold increase in myotube area on these surfaces compared to the other ECM proteins. Species specific differences revealed that human SkMDCs uniaxially aligned over a wide range of micropatterned line dimensions, while C2C12s required specific line widths and spacings to do the same. Future work will incorporate these results to engineer aligned human skeletal muscle tissue in 2D for in vitro applications in disease modeling, drug discovery and toxicity screening.

Keywords

Skeletal muscle Tissue engineering Extracellular matrix Microcontact printing 

Abbreviations

ECM

Extracellular matrix

LAM

Laminin

FN

Fibronectin

Col I

Collagen I

Col IV

Collagen IV

SkMDCs

Skeletal muscle derived cells

μCP

Microcontact printed

MFI

Myotube fusion index (nuclei/myotube)

PDMS

Polydimethylsiloxane

Supplementary material

10439_2016_1592_MOESM1_ESM.pdf (2.6 mb)
Supplementary material 1 (PDF 2626 kb)

Funding information

Funder NameGrant NumberFunding Note
National Heart, Lung, and Blood Institute
  • DP2HL117750

Copyright information

© Biomedical Engineering Society 2016

Authors and Affiliations

  • Rebecca M. Duffy
    • 1
  • Yan Sun
    • 1
    • 2
  • Adam W. Feinberg
    • 1
    • 3
  1. 1.Regenerative Biomaterials and Therapeutics Group, Department of Biomedical EngineeringCarnegie Mellon UniversityPittsburghUSA
  2. 2.Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina
  3. 3.Department of Materials Science and EngineeringCarnegie Mellon UniversityPittsburghUSA

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