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https://www.readbyqxmd.com/read/29140567/human-adipose-derived-stromal-cell-isolation-methods-and-use-in-osteogenic-and-adipogenic-in-vivo-applications
#1
Elizabeth Brett, Ruth Tevlin, Adrian McArdle, Eun Young Seo, Charles K F Chan, Derrick C Wan, Michael T Longaker
Adipose tissue represents an abundant and easily accessible source of multipotent cells, which may serve as excellent building blocks for tissue engineering. This article presents a newly described protocol for isolating adipose-derived stromal cells (ASCs) from human lipoaspirate, compared to the standard protocol for harvesting ASCs established in 2001. Human ASC isolation is performed using two methods, and resultant cells are compared through cell yield, cell viability, cell proliferation and regenerative potential...
November 15, 2017: Current Protocols in Stem Cell Biology
https://www.readbyqxmd.com/read/29102952/comparison-of-the-viability-and-yield-of-adipose-derived-stem-cells-ascs-from-different-donor-areas
#2
Anastasios Tsekouras, Dimitrios Mantas, Diamantis I Tsilimigras, Demetrios Moris, Michael Kontos, George C Zografos
BACKGROUND: Adipose tissue contains variable amounts of stem cells that have recently attracted increased interest due to their strong proliferative and differentiation capacity. However, significant heterogeneity exists in terms of stem cell yield and viability profile among individuals as well as different donor areas. MATERIALS AND METHODS: Between June 2016 and July 2016, forty (40) women underwent outpatient cosmetic liposuction procedures conferring a total of 53 lipoaspirates; inner thigh (n=13), outer thigh (n=9), abdomen (n=9), waist (n=16) and inner knee (n=6)...
November 2017: In Vivo
https://www.readbyqxmd.com/read/29068969/positive-effect-of-incubated-adipose-derived-mesenchymal-stem-cells-on-microfat-graft-survival
#3
Jong Woo Choi, Sung-Chan Kim, Eun-Jung Park, Ju-A Lee, Woo Shik Jeong
Autologous fat grafting is commonly used for soft tissue augmentation, but its unpredictably high resorption rate remains a major limitation. Although adipose-derived mesenchymal stem cells (ASCs) are an attractive candidate for enhancing graft retention, their poor posttransplantation viability limits their application. The authors aimed to evaluate the effect of incubated ASCs on microfat graft survival in an immunocompromised mouse model. Lipoaspirates for microfat injection were collected from the wasted lower abdominal adipose tissues of 5 patients who had undergone breast reconstructive surgery with an abdominal flap...
October 24, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29068928/the-effect-of-processing-technique-on-fat-graft-survival
#4
COMPARATIVE STUDY
Orlando Canizares, Jennifer E Thomson, Robert J Allen, Edward H Davidson, John P Tutela, Pierre B Saadeh, Stephen M Warren, Alexes Hazen
BACKGROUND: Wide variations in fat graft survival have been reported. The authors hypothesize that treating the adipose tissue on Telfa gauze creates a processed lipoaspirate with a more functional adipokine profile that improves fat graft survival. METHODS: Suction-assisted lipoaspirate was harvested from humans and was either processed by centrifugation, rolled on Telfa gauze, or left unprocessed. Progenitor cell populations were quantified and characterized by flow cytometry...
November 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29051810/controlled-dexamethasone-delivery-via-double-walled-microspheres-to-enhance-long-term-adipose-tissue-retention
#5
Arta Kelmendi-Doko, J Peter Rubin, Katarina Klett, Christopher Mahoney, Sheri Wang, Kacey G Marra
Current materials used for adipose tissue reconstruction have critical shortcomings such as suboptimal volume retention, donor-site morbidity, and poor biocompatibility. The aim of this study was to examine a controlled delivery system of dexamethasone to generate stable adipose tissue when mixed with disaggregated human fat in an athymic mouse model for 6 months. The hypothesis that the continued release of dexamethasone from polymeric microspheres would enhance both adipogenesis and angiogenesis more significantly when compared to the single-walled microsphere model, resulting in long-term adipose volume retention, was tested...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29027984/the-effect-of-intra-articular-injection-of-autologous-microfragmented-fat-tissue-on-proteoglycan-synthesis-in-patients-with-knee-osteoarthritis
#6
Damir Hudetz, Igor Borić, Eduard Rod, Željko Jeleč, Andrej Radić, Trpimir Vrdoljak, Andrea Skelin, Gordan Lauc, Irena Trbojević-Akmačić, Mihovil Plečko, Ozren Polašek, Dragan Primorac
Osteoarthritis (OA) is one of the leading musculoskeletal disorders in the adult population. It is associated with cartilage damage triggered by the deterioration of the extracellular matrix tissue. The present study explores the effect of intra-articular injection of autologous microfragmented adipose tissue to host chondrocytes and cartilage proteoglycans in patients with knee OA. A prospective, non-randomized, interventional, single-center, open-label clinical trial was conducted from January 2016 to April 2017...
October 13, 2017: Genes
https://www.readbyqxmd.com/read/29025229/mechanical-supplementation-with-the-stromal-vascular-fraction-yields-improved-volume-retention-in-facial-lipotransfer-a-1-year-comparative-study
#7
Natale Ferreira Gontijo-de-Amorim, Luiz Charles-de-Sá, Gino Rigotti
Background: Unpredictable volume maintenance in the long term is a major limitation of autologous fat grafting. Objectives: The authors compared results of autologous lipotransfer to the face with or without enrichment of fat with the stromal vascular fraction (SVF). Methods: Thirty patients with asymmetric depletion of facial volume were included in a prospective study. Patients were randomly assigned to undergo a single session of autologous fat transfer with washed adipose tissue (control group) or with washed adipose tissue combined with the pellet of centrifuged lipoaspirate, which contained the SVF (enriched group)...
October 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025217/use-of-lipotransfer-in-scleroderma
#8
Michelle F Griffin, Aurora Almadori, Peter E Butler
Lipotransfer for soft tissue filling is a well-established plastic and aesthetic surgical technique. Elective fat grafting is considered a safe and well-tolerated procedure. Coleman and others have reported that fat grafting may have tissue regenerative properties and not only serve as a soft tissue filler. There have been reports from our group and others that it may improve fibrosis secondary to many different pathological aetiologies including scleroderma, burn injury, lichen sclerosis, graft vs host disease, and radiation...
July 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025216/assisted-salvage-of-ischemic-fasciocutaneous-flap-using-adipose-derived-mesenchymal-stem-cells-in-situ-revascularization
#9
Michael H Carstens, Mauricio Mendieta, Cecilia Pérez, Esperanza Villareal, Rodolfo Garcia
Adipose-derived mesenchymal stem cells (ASCs) have been shown to produce vascular endothelial growth factor (VEGF) and can increase perfusion in patients with critical limb ischemia. We will show that this concept can be applied to augment blood flow in zones of flap ischemia. We presented a case study of a 26-year-old man with a complex hand injury covered by a reverse radial perforator fasciocutaneous flap, which developed ischemic necrosis and was treated by debridement, transplantation of ASCs to enhance vascular support, and saline dressings...
July 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025212/use-of-freshly-isolated-human-adipose-stromal-cells-for-clinical-applications
#10
Ryan A Lockhart, Joel A Aronowitz, Severiano Dos-Anjos Vilaboa
The clinical use of adipose-derived cells is being explored very actively around the world for various human diseases. Adipose tissue is an abundant tissue source that can be easily harvested using liposuction. Human lipoaspirates contain a significant amount of mesenchymal stromal cells, as well as other progenitors and terminally differentiated cell types. This review covers the isolation of adipose stromal vascular fraction (SVF), the quality control and safety analysis of freshly isolated cell suspensions...
July 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/28947428/fat-attacks-a-case-of-fat-embolisation-syndrome-postliposuction
#11
Adam Ali, George Theobald, Mohammed Asif Arshad
Liposuction is a procedure commonly performed in the UK usually with a low incidence of serious sequelae; however with larger patients and increased volumes of lipoaspirate, complications have been reported more frequently. One of the rare but very serious complications postliposuction is fat embolism syndrome (FES), a life-threatening condition difficult to diagnose and limited in treatment.The authors present the case of a 45-year-old woman who was admitted to the intensive care unit postelective liposuction for bilateral leg lipoedema...
September 25, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28922324/biological-properties-and-therapeutic-value-of-cryopreserved-fat-tissue
#12
Takanobu Mashiko, Szu-Hsien Wu, Koji Kanayama, Rintaro Asahi, Takako Shirado, Masanori Mori, Ataru Sunaga, Shunji Sarukawa, Hirokazu Uda, Kotaro Yoshimura
BACKGROUND: Fat grafting frequently requires multiple treatments and thus repeated liposuction to achieve treatment goals. The purpose of this study is to evaluate whether cryopreservation of adipose tissue may facilitate future fat grafting. METHODS: Lipoaspirates were harvested from six adult females and preserved using two cryopreservation methods: 1) simple cooling to -80˚C (cryo-1); or 2) programmed cooling to -190˚C (cryo-2). Fresh fat, cryo-1 fat, and cryo-2 fat were analyzed both in vitro and in vivo...
September 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28917626/ultrasound-assisted-liposuction-provides-a-source-for-functional-adipose-derived-stromal-cells
#13
Dominik Duscher, Zeshaan N Maan, Anna Luan, Matthias M Aitzetmüller, Elizabeth A Brett, David Atashroo, Alexander J Whittam, Michael S Hu, Graham G Walmsley, Khosrow S Houschyar, Arndt F Schilling, Hans-Guenther Machens, Geoffrey C Gurtner, Michael T Longaker, Derrick C Wan
BACKGROUND AIMS: Regenerative medicine employs human mesenchymal stromal cells (MSCs) for their multi-lineage plasticity and their pro-regenerative cytokine secretome. Adipose-derived mesenchymal stromal cells (ASCs) are concentrated in fat tissue, and the ease of harvest via liposuction makes them a particularly interesting cell source. However, there are various liposuction methods, and few have been assessed regarding their impact on ASC functionality. Here we study the impact of the two most popular ultrasound-assisted liposuction (UAL) devices currently in clinical use, VASER (Solta Medical) and Lysonix 3000 (Mentor) on ASCs...
September 13, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28905449/lull-pgm-system-a-suitable-technique-to-improve-the-regenerative-potential-of-autologous-fat-grafting
#14
Paolo G Morselli, Federico A Giorgini, Claudia Pazzini, Claudio Muscari
Autologous fat grafting and methods of purification of harvested tissue have become one of the most current themes in regenerative medicine. The aim of this study was to evaluate the in vitro regenerative potential of abdomen lipoaspirates subjected to a combined washing-decantation purifying procedure, the Lull pgm System (Lull). Blood cells and stromal-vascular fraction (SVF) cells contained in the aspirates were investigated and compared with those obtained through more conventional fat-processing methods, that is, the decantation and Coleman's centrifugation techniques...
September 14, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28893630/engineered-axially-vascularized-osteogenic-grafts-from-human-adipose-derived-cells-to-treat-avascular-necrosis-of-bone-in-a-rat-model
#15
Tarek Ismail, Rik Osinga, Atanas Todorov, Alexander Haumer, Laurent A Tchang, Christian Epple, Nima Allafi, Nadia Menzi, René D Largo, Alexandre Kaempfen, Ivan Martin, Dirk J Schaefer, Arnaud Scherberich
BACKGROUND: Avascular necrosis of bone (AVN) leads to sclerosis and collapse of bone and joints. The standard of care, vascularized bone grafts, is limited by donor site morbidity and restricted availability. The aim of this study was to generate and test engineered, axially vascularized SVF cells-based bone substitutes in a rat model of AVN. METHODS: SVF cells were isolated from lipoaspirates and cultured onto porous hydroxyapatite scaffolds within a perfusion-based bioreactor system for 5days...
November 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28879656/variability-in-responses-observed-in-human-white-adipose-tissue-models
#16
Rosalyn D Abbott, Francis E Borowsky, Carlo A Alonzo, Adam Zieba, Irene Georgakoudi, David L Kaplan
Obesity is a risk factor for a myriad of diseases including diabetes, cardiovascular dysfunction, cirrhosis and cancer and there is a need for new systems to study how excess adipose tissue relates to the onset of disease processes. This study provides proof of concept patient-specific tissue models of human white adipose tissue to accommodate the variability in human samples. Our 3D tissue engineering approach established lipolytic responses and changes in insulin-stimulated glucose uptake from small volumes of human lipoaspirate, making this methodology useful for patient specific sample source assessments of treatment strategies, drug responses, disease mechanisms and other responses that vary between patients...
September 6, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28861370/increased-risk-of-recurrence-associated-with-certain-risk-factors-in-breast-cancer-patients-after-diep-flap-reconstruction-and-lipofilling-a-matched-cohort-study-with-200-patients
#17
Sonia Fertsch, Mazen Hagouan, Beatrix Munder, Tino Schulz, Alina Abu-Ghazaleh, Julia Schaberick, Peter Stambera, Mohammed Aldeeri, Christoph Andree, Oliver Christian Thamm
BACKGROUND: Lipofilling is performed in breast cancer patients to optimize the aesthetic outcome following breast reconstruction after mastectomy. Despite its common usage worldwide, little is known about the interaction of the lipoaspirate and dormant cancer cells. Up to date, no risk factors that increase the risk for cancer recurrence have been established. This study aims to identify risk factors for lipofilling candidates after breast cancer and questions the oncological safety of lipofilling in lymph node positive disease...
August 2017: Gland Surgery
https://www.readbyqxmd.com/read/28860871/first-in-man-intraglandular-implantation-of-stromal-vascular-fraction-and-adipose-derived-stem-cells-plus-platelet-rich-plasma-in-irradiation-induced-gland-damage-a-case-study
#18
Kristin Comella, Walter Bell
BACKGROUND: Stromal vascular fraction (SVF) is a mixture of cells which can be isolated from a mini-lipoaspirate of fat tissue. Platelet-rich plasma (PRP) is a mixture of growth factors and other nutrients which can be obtained from peripheral blood. Adipose-derived stem/stromal cells (ADSCs) can be isolated from fat tissue and expanded in culture. The SVF includes a variety of different cells such as ADSCs, pericytes, endothelial/progenitor cells, and a mix of different growth factors...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28855688/maximizing-non-enzymatic-methods-for-harvesting-adipose-derived-stem-from-lipoaspirate-technical-considerations-and-clinical-implications-for-regenerative-surgery
#19
Barbara Bellei, Emilia Migliano, Marinella Tedesco, Silvia Caputo, Mauro Picardo
In the past decade, adipose tissue has become a highly interesting source of adult stem cells for plastic surgery and regenerative medicine. The adipose source offers two options for the isolation of regenerative cells: the enzymatic digestion an expensive time-consuming procedure lacking a common standard operating protocol, or the non-enzymatic dissociation methods based on mechanical forces to break the processed adipose tissue. Here, we propose innovative inexpensive non-enzymatic protocols to collect and concentrate clinically useful regenerative cells from adipose tissue by centrifugation of the infranatant fraction of lipoaspirate as first step, usually discarded as a byproduct of the surgical procedure, and by fat shaking and wash as second enrichment step...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28806292/-optimization-and-standardization-of-the-immunodeficient-mouse-model-for-assessing-fat-grafting-outcomes
#20
Lauren E Kokai, Taraneh L Jones, Russell Silowash, Brian Theisen, Gabriella DiBernardo, Andrew Lu, Bowen Yi, Kacey G Marra, J Peter Rubin
BACKGROUND: Animal models are often used to assess interventions that might improve fat grafting outcomes, however, there is great variability in the models. We sought to determine the predictive value of the immunocompromised mouse model for fat grafting so that experiments could be standardized and optimized. METHODS: Human lipoaspirate injections at different volumes and time points were assessed in a nude mouse model and compared with control injections of non-viable fat...
August 3, 2017: Plastic and Reconstructive Surgery
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