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BACKGROUND: Regenerative therapies like cell-assisted lipotransfer or preclinical experimental studies use adipose tissue-derived stem cells (ASCs) as the main therapeutic agent. But there are also factors depending on the clinical donor that influence the cell yield and regenerative potential of human ASCs and stromal vascular fraction (SVF). Therefore, the aim of this review was to identify and evaluate these factors according to current literature. METHODS: For this purpose, a systematic literature review was performed with focus on factors affecting the regenerative potential of ASCs and SVF using the National Library of Medicine. RESULTS: Currently, there is an abundance of studies regarding clinical donor factors influencing ASCs properties. But there is some contradiction and need for further investigation. Nevertheless, we identified several recurrent factors: age, sex, weight, diabetes, lipoedema, use of antidepressants, anti-hormonal therapy and chemotherapy. CONCLUSION: We recommend characterisation of the ASC donor cohort in all publications, regardless of whether they are experimental studies or clinical trials. By these means, donor factors that influence experimental or clinical findings can be made transparent and results are more comparable. Moreover, this knowledge can be used for study design to form a homogenous donor cohort by precise clinical history and physical examination.
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Tejido Adiposo , Células Madre , Diferenciación Celular , Estudios de Cohortes , HumanosRESUMEN
BACKGROUND: Fingertip injuries treated with occlusive dressings (ODs) lead to nearly scar-free, functionally, and aesthetically pleasing results. We hypothesized that paracrine factors in the wound fluid (secretome) may influence migration and proliferation of mesenchymal stem cells (MSCs) and fibroblasts and modulate the wound-healing process. METHODS: We could collect wound fluid samples from 4 fingertip injuries and 7 split skin donor sites at the 5th day during dressing change. Blood serum samples served as controls. The proliferation rate of MSCs and fibroblasts (HS27) was continuously measured through impedance analysis for 60 h and by Alamarblue analysis after 72 h. Cell migration was evaluated continuously for 15 h and confirmed by the in vitro wound-healing assay. RESULTS: Migration of MSCs under the influence of both wound fluids was significantly faster than controls from 4 to 6 h after incubation and reversed after 9 h. MSC proliferation in wound fluid groups showed a significant increase at 5 and 10 h and was significantly decreased after 45 h. Fibroblasts in wound fluid groups showed overall a significant increase in migration and a significant decrease in proliferation compared to controls. CONCLUSION: OD-induced secretomes influence MSCs and fibroblasts and thereby possibly modulate wound healing and scar tissue formation.
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Líquidos Corporales/fisiología , Movimiento Celular/fisiología , Proliferación Celular/fisiología , Fibroblastos/fisiología , Células Madre Mesenquimatosas/fisiología , Apósitos Oclusivos/efectos adversos , Heridas y Lesiones/metabolismo , Adulto , Anciano , Anciano de 80 o más Años , Animales , Líquidos Corporales/metabolismo , Línea Celular , Células Cultivadas , Femenino , Fibroblastos/citología , Humanos , Masculino , Células Madre Mesenquimatosas/citología , Persona de Mediana Edad , Piel/lesiones , Piel/metabolismo , Cicatrización de Heridas/fisiología , Heridas y Lesiones/etiologíaRESUMEN
This article describes the rare condition of scrotal lymphedema (elephantiasis) in a Caucasian man. To our knowledge, this is the most giant form of scrotal elephantiasis that was ever described in Germany. Aim of this case report is to present an appealing aesthetic possibility of surgical treatment and reconstruction of the genitals while preserving the testes.
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Elefantiasis , Linfedema , Escroto , Alemania , Humanos , Masculino , Escroto/patologíaRESUMEN
Background/Aim Preliminary data suggest that an intraarticular autologous fat transplant may be useful in osteoarthritis (OA) of the CMC-1 joint. This prospective, non-randomised pilot study investigates this new method with a view to clinical outcomes compared with intraarticular corticosteroid injection. Patients and Methods 17 women and 7 men with an average age of 63.3 (47-75) years with symptomatic OA were included in the study. In 12 patients, a radiologically guided injection of 1-1.5 ml of adipose tissue was carried out after transumbilical liposuction of 10 ml of abdominal fat. Prior to that, the fat was homogenised using two Luer-Lock Syringes, but not centrifuged. Postoperatively, the thumb was immobilised for one week. The patients from the cortisone control group received an intraarticular injection of 10 mg (1 ml) of Triamcinolon® under sterile conditions without subsequent immobilisation. Preoperatively as well as 2, 6 and 12 weeks postoperatively, the QuickDASH and the Michigan-Hand-Questionnaire (MHQ) were analysed, the pain was measured by means of the visual analogue scale (VAS), and strength and grip force were measured. Results Both the cortisone group and the autologous fat group showed a significant reduction in stress pain after two weeks. Both methods had no significant effect on force. The evaluation of quality of life by means of QuickDASH and MHQ after cortisone treatment initially demonstrated an improvement in quality of life, which, however, fell below the previous level after 6 weeks. After autologous fat transplantation, quality of life increased continuously. Conclusion In contrast to cortisone injection treatment, a persistent pain reduction was achieved in the fat injection group in the 3-month follow-up period, whereas cortisone injection only resulted in a short-term reduction of pain lasting about 6 weeks. Long-term follow-up is required now to show how long the effect of autologous fat transplantation in OA can be sustained.