Hybrid hydrogel-aligned carbon nanotube scaffolds to enhance cardiac differentiation of embryoid bodies

Samad Ahadian, Shukuyo Yamada, Javier Ramón-Azcón, Mehdi Estili, Xiaobin Liang, Ken Nakajima, Hitoshi Shiku, Ali Khademhosseini, Tomokazu Matsue

    Research output: Contribution to journalArticlepeer-review

    95 Citations (Scopus)


    Carbon nanotubes (CNTs) were aligned in gelatin methacryloyl (GelMA) hydrogels using dielectrophoresis approach. Mouse embryoid bodies (EBs) were cultured in the microwells fabricated on the aligned CNT-hydrogel scaffolds. The GelMA-dielectrophoretically aligned CNT hydrogels enhanced the cardiac differentiation of the EBs compared with the pure GelMA and GelMA-random CNT hydrogels. This result was confirmed by Troponin-T immunostaining, the expression of cardiac genes (i.e., Tnnt2, Nkx2-5, and Actc1), and beating analysis of the EBs. The effect on EB properties was significantly enhanced by applying an electrical pulse stimulation (frequency, 1 Hz; voltage, 3 V; duration, 10 ms) to the EBs for two continuous days. Taken together, the fabricated hybrid hydrogel-aligned CNT scaffolds with tunable mechanical and electrical characteristics offer an efficient and controllable platform for electrically induced differentiation and stimulation of stem cells for potential tissue regeneration and cell therapy applications. Statement of significance Dielectrophoresis approach was used to rapidly align carbon nanotubes (CNTs) in gelatin methacryloyl (GelMA) hydrogels resulting in hybrid GelMA-CNT hydrogels with tunable and anisotropic electrical and mechanical properties. The GelMA-aligned CNT hydrogels may be used to apply accurate and controllable electrical pulses to cell and tissue constructs and thereby regulating their behavior and function. In this work, it was demonstrated that the GelMA hydrogels containing the aligned CNTs had superior performance in cardiac differentiation of stem cells upon applying electrical stimulation in contrast with control gels. Due to broad use of electrical stimulation in tissue engineering and stem cell differentiation, it is envisioned that the GelMA-aligned CNT hydrogels would find wide applications in tissue regeneration and stem cell therapy.

    Original languageEnglish
    Pages (from-to)134-143
    Number of pages10
    JournalActa Biomaterialia
    Publication statusPublished - 2016 Feb 1


    • Carbon nanotubes
    • Cardiac differentiation
    • Electrical stimulation
    • Embryoid body
    • Hydrogel

    ASJC Scopus subject areas

    • Biotechnology
    • Biomaterials
    • Biochemistry
    • Biomedical Engineering
    • Molecular Biology


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