Back to Journals » International Journal of Nanomedicine » Volume 16

Modulating the Biomechanical Properties of Engineered Connective Tissues by Chitosan-Coated Multiwall Carbon Nanotubes

Authors Kittana N, Assali M, Zimmermann WH, Liaw N, Santos GL, Rehman A, Lutz S

Received 28 October 2020

Accepted for publication 20 January 2021

Published 15 February 2021 Volume 2021:16 Pages 989—1000


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Thomas J. Webster

Naim Kittana, 1 Mohyeddin Assali, 2 Wolfram-Hubertus Zimmermann, 3, 4 Norman Liaw, 3, 4 Gabriela Leao Santos, 3, 4 Abdul Rehman, 3, 4 Susanne Lutz 3, 4

1Department of Biomedical Sciences, Faculty of Medicine & Health Sciences, An-Najah National University, Nablus, Palestine; 2Department of Pharmacy, Faculty of Medicine & Health Sciences, An-Najah National University, Nablus, Palestine; 3Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Göttingen, Germany; 4DZHK (German Center for Cardiovascular Research) Partner Site Göttingen, Göttingen, Germany

Correspondence: Naim Kittana
Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, An Najah National University, Akademia Street, Nablus, Palestine
Tel +970 (9) 2345113
Fax +970 (9) 2345982

Background: Under certain conditions, the physiological repair of connective tissues might fail to restore the original structure and function. Optimized engineered connective tissues (ECTs) with biophysical properties adapted to the target tissue could be used as a substitution therapy. This study aimed to investigate the effect of ECT enforcement by a complex of multiwall carbon nanotubes with chitosan (C-MWCNT) to meet in vivo demands.
Materials and Methods: ECTs were constructed from human foreskin fibroblasts (HFF-1) in collagen type I and enriched with the three different percentages 0.025, 0.05 and 0.1% of C-MWCNT. Characterization of the physical properties was performed by biomechanical studies using unidirectional strain.
Results: Supplementation with 0.025% C-MWCNT moderately increased the tissue stiffness, reflected by Young’s modulus, compared to tissues without C-MWCNT. Supplementation of ECTs with 0.1% C-MWCNT reduced tissue contraction and increased the elasticity and the extensibility, reflected by the yield point and ultimate strain, respectively. Consequently, the ECTs with 0.1% C-MWCNT showed a higher resilience and toughness as control tissues. Fluorescence tissue imaging demonstrated the longitudinal alignment of all cells independent of the condition.
Conclusion: Supplementation with C-MWCNT can enhance the biophysical properties of ECTs, which could be advantageous for applications in connective tissue repair.

Keywords: engineered connective tissue, multiwall carbon nanotubes, chitosan, mechanical properties, collagen-based tissue scaffold

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]