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      Treatment of faecal incontinence using allogeneic-adipose-derived mesenchymal stem cells: a study protocol for a pilot randomised controlled trial

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          Abstract

          Introduction

          Faecal incontinence is a distressing condition with recurrent uncontrolled passage of faecal material. Although faecal incontinence may cause psychological depression and social isolation, previous treatments have been limited. Recently, regenerative treatment has been developed using mesenchymal stem cells. Especially, there are possibilities that adipose-tissue-derived stem cells can be effective to treat a degenerated anal sphincter that is causing faecal incontinence. Therefore, this study aimed to investigate the safety and efficacy of using allogeneic-adipose-derived mesenchymal stem cells in the treatment of the anal sphincter of patients with faecal incontinence.

          Methods and analysis

          This study is a randomised, prospective, dose escalation, placebo-controlled, single-blinded, single-centre trial with two parallel groups. The safety test is performed by an injection of allogeneic-adipose-derived mesenchymal stem cells (ALLO-ASCs) into the anal sphincter with dose escalation (3×10 7, 6×10 7 and 9×10 7 cells, sequentially). After confirming the safety of the stem cells, an efficacy test is performed by this dose in the experimental group. The experimental group will receive ALLO-ASCs mixed with fibrin glue into the anal sphincter, and the placebo group will receive 0.9% normal saline injection mixed with fibrin glue. The primary end point is to assess the safety of ALLO-ASCs after the injection into the anal sphincter, and the secondary end point is to compare the efficacy of ALLO-ASC injection with fibrin glue in patients with faecal incontinence.

          Ethics and dissemination

          The study protocol was approved by the Ministry of Food and Drug Safety and the Ministry of Health & Welfare, in the Republic of Korea. The informed consent form was approved by the institutional review board of Gangnam Severance Hospital (IRB approval number 3-2014-0271). Dissemination of the results will be presented at a conference and in peer-reviewed publications.

          Trial registration number

          NCT02384499; Pre-results.

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          Most cited references22

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          Comparison of allogeneic vs autologous bone marrow–derived mesenchymal stem cells delivered by transendocardial injection in patients with ischemic cardiomyopathy: the POSEIDON randomized trial.

          Mesenchymal stem cells (MSCs) are under evaluation as a therapy for ischemic cardiomyopathy (ICM). Both autologous and allogeneic MSC therapies are possible; however, their safety and efficacy have not been compared. To test whether allogeneic MSCs are as safe and effective as autologous MSCs in patients with left ventricular (LV) dysfunction due to ICM. A phase 1/2 randomized comparison (POSEIDON study) in a US tertiary-care referral hospital of allogeneic and autologous MSCs in 30 patients with LV dysfunction due to ICM between April 2, 2010, and September 14, 2011, with 13-month follow-up. Twenty million, 100 million, or 200 million cells (5 patients in each cell type per dose level) were delivered by transendocardial stem cell injection into 10 LV sites. Thirty-day postcatheterization incidence of predefined treatment-emergent serious adverse events (SAEs). Efficacy assessments included 6-minute walk test, exercise peak VO2, Minnesota Living with Heart Failure Questionnaire (MLHFQ), New York Heart Association class, LV volumes, ejection fraction (EF), early enhancement defect (EED; infarct size), and sphericity index. Within 30 days, 1 patient in each group (treatment-emergent SAE rate, 6.7%) was hospitalized for heart failure, less than the prespecified stopping event rate of 25%. The 1-year incidence of SAEs was 33.3% (n = 5) in the allogeneic group and 53.3% (n = 8) in the autologous group (P = .46). At 1 year, there were no ventricular arrhythmia SAEs observed among allogeneic recipients compared with 4 patients (26.7%) in the autologous group (P = .10). Relative to baseline, autologous but not allogeneic MSC therapy was associated with an improvement in the 6-minute walk test and the MLHFQ score, but neither improved exercise VO2 max. Allogeneic and autologous MSCs reduced mean EED by −33.21% (95% CI, −43.61% to −22.81%; P < .001) and sphericity index but did not increase EF. Allogeneic MSCs reduced LV end-diastolic volumes. Low-dose concentration MSCs (20 million cells) produced greatest reductions in LV volumes and increased EF. Allogeneic MSCs did not stimulate significant donor-specific alloimmune reactions. In this early-stage study of patients with ICM, transendocardial injection of allogeneic and autologous MSCs without a placebo control were both associated with low rates of treatment-emergent SAEs, including immunologic reactions. In aggregate, MSC injection favorably affected patient functional capacity, quality of life, and ventricular remodeling. clinicaltrials.gov Identifier: NCT01087996.
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            A phase I clinical trial of the treatment of Crohn's fistula by adipose mesenchymal stem cell transplantation.

            The effective management of fistulas in patients with Crohn's disease presents an extremely challenging problem. Mesenchymal adult stem cells extracted from certain tissues, such as adipose tissue, can differentiate into various cell types. Therefore, we have tried to use such cells to stimulate healing of Crohn's fistulas. We designed a prospective Phase I clinical trial, involving five patients with Crohn's disease, to test the feasibility and safety of autologous stem cells transplantation in the treatment of fistulas. We also studied the expression of various cell markers and the growth rates of the lipoaspirate-derived cells that were used for transplantation. One patient was excluded because of bacterial contamination of cultured cells. We inoculated nine fistulas in four patients with autologous adipose tissue-derived stem cells at Passage 3 or earlier. Eight inoculated fistulas were followed weekly for at least eight weeks. In six fistulas, the external opening was covered with epithelium at the end of Week 8, and, thus, these fistulas were considered healed (75 percent). In the other two fistulas, there was only incomplete closure of the external opening, with a decrease in output flow (not healed; 25 percent). No adverse effects were observed in any patient at the end of the follow-up period (minimum follow-up,12 months; maximum follow-up, 30 months; follow-up average, 22 months). To our knowledge, this is the first report of a clinical trial of cell therapy using autologous stem cells obtained from a lipoaspirate. Our results indicate that our protocol is feasible and safe for the treatment of fistulas in Crohn's disease. The number of patients included and the uncontrolled nature of Phase I clinical trials do not allow demonstration of the effectiveness of the treatment. However, the results of the present study encourage to perform further studies in Phase II.
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              Spontaneous human adult stem cell transformation.

              Human adult stem cells are being evaluated widely for various therapeutic approaches. Several recent clinical trials have reported their safety, showing them to be highly resistant to transformation. The clear similarities between stem cell and cancer stem cell genetic programs are nonetheless the basis of a recent proposal that some cancer stem cells could derive from human adult stem cells. Here we show that although they can be managed safely during the standard ex vivo expansion period (6-8 weeks), human mesenchymal stem cells can undergo spontaneous transformation following long-term in vitro culture (4-5 months). This is the first report of spontaneous transformation of human adult stem cells, supporting the hypothesis of cancer stem cell origin. Our findings indicate the importance of biosafety studies of mesenchymal stem cell biology to efficiently exploit their full clinical therapeutic potential.
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                Author and article information

                Journal
                BMJ Open
                BMJ Open
                bmjopen
                bmjopen
                BMJ Open
                BMJ Publishing Group (BMA House, Tavistock Square, London, WC1H 9JR )
                2044-6055
                2016
                17 February 2016
                : 6
                : 2
                : e010450
                Affiliations
                [1 ]Division of Colon and Rectal Surgery, Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine , Seoul, Republic of Korea
                [2 ]Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
                Author notes
                [Correspondence to ] Professor Seung Hyuk Baik; whitenoja@ 123456yuhs.ac
                Article
                bmjopen-2015-010450
                10.1136/bmjopen-2015-010450
                4762113
                26888731
                023426d1-adbb-4e35-9268-9f58dc131dc9
                Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

                This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

                History
                : 4 November 2015
                : 7 January 2016
                : 21 January 2016
                Categories
                Surgery
                Protocol
                1506
                1737
                1723

                Medicine
                fecal incontinence,stem cell,mesenchymal stem cell,adipose-derived mesenchymal stem cell

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