title: Power-Assisted Liposuction Versus Tissue Resection for the Isolation of Adipose Tissue-Derived Mesenchymal Stem Cells: Phenotype, Senescence, and Multipotency at Advanced Passages.
abstract: BACKGROUND
  Adipose tissue-derived mesenchymal stem cells (ASCs) can be isolated from subcutaneous fat harvested by tissue resection or liposuction.
  
  
  OBJECTIVE
  The authors compared ASCs isolated by tissue resection or power-assisted liposuction (PAL) to determine whether either surgical procedure yielded ASCs with improved purity and competence that was preserved for several passages.
  
  
  METHODS
  For this experimental study, ASCs were isolated from fat harvested by tissue resection or PAL from six patients who underwent abdominoplasty. ASCs were counted to determine cell yields, and viabilities were assessed with an amine-reactive dye and by fluorescence-activated cell sorting (FACS). Cell phenotypes were determined by immunostaining and FACS, and doubling times were calculated. Senescence ratios of the cells were detected by gene profiling and by assaying β-galactosidase activity. Multipotency was evaluated by induced differentiation analyses.
  
  
  RESULTS
  No significant differences were observed in cell numbers or viabilities of ASCs isolated following either surgical method of fat harvesting. Both populations of cultured ASCs expressed markers of mesenchymal stem cells and preserved this expression pattern through the third passage. PAL and tissue resection yielded ASCs with similar division rates, similar senescence ratios into the fourth passage, and similar capacities to differentiate into osteocytes or adipocytes.
  
  
  CONCLUSIONS
  Fat harvested by PAL or tissue resection yielded uniform cultures of ASCs with high division rates, low senescence ratios, and multipotency preserved into passages 3 and 4. Because PAL is less invasive, it may be preferable for the isolation of ASCs.
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Aya
authors: A
authors: Barzelay
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Ran
authors: R
authors: Levy
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Emmanulle
authors: E
authors: Kohn
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Meirav
authors: M
authors: Sella
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Nir
authors: N
authors: Shani
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Benjamin
authors: B
authors: Meilik
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Michal
authors: M
authors: Entin-Meer
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Eyal
authors: E
authors: Gur
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Anat
authors: A
authors: Loewenstein
authors: Dr Barzelay is a resident, Drs Levy and Kohn are Assistant Researchers, Dr Loewenstein is a Professor of Ophthalmology and Chair of the Department of Ophthalmology, and Dr Barak is a Professor of Ophthalmology and Director of the Vitreoretinal Surgery Unit in the Ophthalmology Laboratory and Department of Ophthalmology at the Tel-Aviv Sourasky Medical Center in Tel-Aviv, Israel. Dr Sella is an Assistant Researcher, Dr Meilik is an Associate Professor and Assistant Researcher, and Dr Gur is a Professor and Chair of the Department of Plastic and Reconstructive Surgery at the Tel-Aviv Sourasky Medical Center. Dr Entin-Meer is an Assistant Researcher in the Department of Cardiology at the Tel-Aviv Sourasky Medical Center.
authors: Adiel
authors: A
authors: Barak
mesh_terms: D050153:Abdominal Fat / Q000166:cytology*; D061645:Abdominoplasty; D017667:Adipocytes / Q000166:cytology* / Q000378:metabolism; D000328:Adult; D002452:Cell Count; D002454:Cell Differentiation; D002455:Cell Division; D002470:Cell Survival; D016922:Cellular Senescence; D005260:Female; D015870:Gene Expression; D006801:Humans; D015187:Lipectomy; D059630:Mesenchymal Stem Cells; D008875:Middle Aged; D020858:Tissue and Organ Harvesting / Q000379:methods*; D001616:beta-Galactosidase / Q000235:genetics / Q000378:metabolism
chemical_list: D001616:beta-Galactosidase