Perianal Fistula Clinical Trial
Official title:
Identification of Molecular Differences of Adipose-derived Mesenchymal Stem Cells Between Non- Responders and Responders in Treatment of Transsphincteric Perianal Fistulas Using Autologous Fat Graft Injection
This study investigated the cellular and molecular characteristics of AT-MSCs obtained from autologous AT therapy in patients with high transphincteric perianal fistulas of crytoglandular origin. Adipose tissue was injected into anal fistulas. Characteristics of adipose tissue mesenchymal stemcells (AT-MSC) was investigated and compared in patients with fistula that healed after the treatment (responders) to patients who failed to heal (non-responders)
Injection with allogene or autologous stem cells has been reported to be efficient treatment of perianal fistulas. An alternative to this treatment could be injection with freshly collected autologous adipose tissue. In this study 27 patients with cryptoglandular anal fistulas were treated with freshly collected autologous adipose tissue.A clinical assessment of the patient prior to inclusion was undertaken and a loose seton placed for at least 6 weeks prior to fat injection. An MRI of the pelvis was performed before inclusion. Fistulas with secondary tracts and/or cavities were excluded. The operation was performed in one procedure including liposuction and injection of adipose tissue. A sample of adipose tissue from all 27 patients was analyzed. AT-MSCs were isolated and characterized using cellular and molecular analyses. Clinical and MRI-scanning evaluation of fistula healing and evaluation of ano-rectal function was performed after 6 months. AT-MSCs phenotype was compared between responders and non-responders with respect to fistula healing. The evaluation of the AT-MSCs was performed in a blinded manner. ;
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