Isolation of Ready‐to‐Use Adipose‐Derived Stem Cell (ASC) Pellet for Clinical Applications and a Comparative Overview of Alternate Methods for ASC Isolation

Edoardo Raposio1, Nicolò Bertozzi2

1 Department of Medicine and Surgery, Plastic Surgery Division, University of Parma, Parma, 2 Cutaneous, Mininvasive, Regenerative and Plastic Surgery Unit, Parma University Hospital, Parma
Publication Name:  Current Protocols in Stem Cell Biology
Unit Number:  Unit 1F.17
DOI:  10.1002/cpsc.29
Online Posting Date:  May, 2017
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Abstract

Current literature does not offer a standardized method to isolate adipose‐derived stem cells (ASCs) for clinical applications and hence clinical studies using ASCs often show inconsistent results. Most of these studies borrow laboratory or benchside‐derived protocols, which are complex, time consuming, and involve the use of chemical, animal‐derived reagents. In this unit we describe a relatively simple and faster isolation protocol that allows collection of a ready‐to‐use ASC pellet for clinical application. All steps are performed in a closed circuit in order to guarantee maximum process sterility. Once the adipose tissue is harvested by means of a standard liposuction procedure, it undergoes a first centrifugation in order to remove the oil and serous fractions. Then ASCs are released by enzymatic digestion from the surrounding connective tissue scaffold. Finally a double series of washing and centrifugation allows one to obtain the ASC pellet alone. We usually graft this ASC pellet onto the skin edge and to the bottom of chronic skin ulcers as ASCs proved to be effective in promoting wound healing processes. Moreover, an increasing number of clinical studies are currently ongoing to test their potential in every medical field, from orthopedics to cardiology, oncology, autoimmune diseases, and tissue engineering. © 2017 by John Wiley & Sons, Inc.

Keywords: adipose‐derived stem cell; mesenchymal stem cells; regenerative surgery; wound healing

     
 
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Table of Contents

  • Reagents and Solutions
  • Commentary
  • Literature Cited
  • Figures
     
 
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Materials

Basic Protocol 1:

  Materials
  • Human adipose tissue
  • Medication (for sutures; e. g., Cosmopor Steril, Hartmann)
  • 2% lidocaine (Monico Spa)
  • Klein solution, 4°C (see recipe)
  • Collagenase digestion solution (see recipe)
  • Saline solution (Frenius Kabi)
  • Scalpel No. 11 (Benefis S.R.L.)
  • Tumescent cannula
  • 50‐ml Lipokit/Adivive FPU syringes (Medikhan, cat. no. TP‐101)
  • Piston screwdriver (Medikhan, cat. no. TP‐402)
  • Tumescent hose (Medikhan, cat. no. SP‐107)
  • Syringe air hose (Medikhan, cat. no. TP‐105)
  • Three‐way valve (Medikhan, cat. no. TP‐112)
  • Lipokit control foot switch (Medikhan, cat. no. TP‐301)
  • Syringes connector II (Medikhan, cat. no. TP‐107)
  • Syringe weight adapter (Medikhan, cat. no. TP‐111)
  • Lipokit 416D (Medikhan)
  • Suction cannula
  • 50‐ml Lipokit/Adivive FPU TP‐102 syringes (Medikhan, cat. no. TP‐102)
  • 50‐ml Luer lock syringe
  • FPU bucket (Medikhan)
  • Celtibator (Medikhan)
  • Luer lock adapter II (Medikhan, cat. no. TP‐109)
  • Luer lock adapter (Medikhan, cat. no. TP‐113)
  • 10‐ml Luer lock syringe
  • Needle
  • 4/0 monofilament stitches
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Figures

Videos

Literature Cited

Literature Cited
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