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Tissue Engineering of the Intestine in a Murine Model
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A novel biodegradable device for intestinal lengthening.

Veronica F Sullins1, Justin P Wagner1, Arnold T Suwarnasarn2

  • 1Department of Surgery, Division of Pediatric Surgery, University of California, Los Angeles, Los Angeles, CA 90095-1749, USA.

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|January 21, 2014
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Summary

Researchers developed a biodegradable polycaprolactone spring to lengthen rat jejunum segments. This novel device successfully elongated intestinal tissue without a guidewire, offering a promising approach for treating short bowel syndrome.

Keywords:
Biodegradable lengthening deviceBowel lengtheningDistraction enterogenesisMechanical enterogenesisShort bowel syndromeSpring lengthening device

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Area of Science:

  • Biomaterials Engineering
  • Gastrointestinal Surgery
  • Regenerative Medicine

Background:

  • Mechanical intestinal lengthening is crucial for treating conditions like short bowel syndrome.
  • Previous methods utilized Nitinol springs but required a stabilizing guidewire.
  • Improving device applicability and biodegradability is essential for clinical translation.

Purpose of the Study:

  • To develop and evaluate a biodegradable spring device for mechanical intestinal lengthening.
  • To assess the efficacy of polycaprolactone (PCL) springs in lengthening rat jejunum segments.
  • To determine if the biodegradable device eliminates the need for a guidewire.

Main Methods:

  • Polycaprolactone (PCL) springs were fabricated with properties mimicking Nitinol springs.
  • In vitro testing assessed spring constants in dry and hydrated conditions.
  • Isolated rat jejunum segments were lengthened in vivo using the PCL springs, followed by histological analysis.

Main Results:

  • Biodegradable PCL springs demonstrated stable spring constants (1.8 ± 0.4 N/m).
  • Jejunal segments were successfully lengthened from 1.0 cm to 2.7 ± 0.4 cm without a guidewire.
  • Histology showed increased smooth muscle thickness and reduced ganglia; peristalsis was confirmed.

Conclusions:

  • A novel biodegradable spring device effectively lengthens intestinal segments mechanically.
  • The biodegradable nature obviates the need for device retrieval, enhancing applicability.
  • This technology holds potential for treating short bowel syndrome and similar conditions.