4.3 Article

Electrospun thymosin Beta-4 loaded PLGA/PLA nanofiber/ microfiber hybrid yarns for tendon tissue engineering application

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ELSEVIER
DOI: 10.1016/j.msec.2019.110268

关键词

Nanofiber yarn; Core-sheath yarn; Drug delivery; Tenogenic differentiation; Cell migration

资金

  1. Mary & Dick Holland Regenerative Medicine Program start-up grant, Nebraska Research Initiative
  2. National Institutes of Health [R01 AR073225]
  3. Chinese science and technology major projects [2017YFB0309805-02, 2018GGX108003]
  4. Nebraska Research Initiative
  5. Fred and Pamela Buffett Cancer Center [P30CA036727]
  6. NIGMS of the NIH [P30GM106397]

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Microfiber yarns (MY) have been widely employed to construct tendon tissue grafts. However, suboptimal ultrastructure and inappropriate environments for cell interactions limit their clinical application. Herein, we designed a modified electrospinning device to coat poly(lactic-co-glycolic acid) PLGA nanofibers onto polylactic acid (PLA) MY to generate PLGA/PLA hybrid yarns (HY), which had a well-aligned nanofibrous structure, resembling the ultrastructure of native tendon tissues and showed enhanced failure load compared to PLA MY. PLGA/PLA HY significantly improved the growth, proliferation, and tendon-specific gene expressions of human adipose derived mesenchymal stem cells (HADMSC) compared to PLA MY. Moreover, thymosin beta-4 (T134) loaded PLGA/PLA HY presented a sustained drug release manner for 28 days and showed an additive effect on promoting HADMSC migration, proliferation, and tenogenic differentiation. Collectively, the combination of T 4 with the nano-topography of PLGA/PLA HY might be an efficient strategy to promote tenogenesis of adult stem cells for tendon tissue engineering.

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