alexa Stem Cell Therapy For The Treatment Of Severe Tissue Damage After Radiation Exposure
ISSN: 2157-7633

Journal of Stem Cell Research & Therapy
Open Access

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6th International Conference and Exhibition on Cell and Gene Therapy
March 27-28, 2017 Madrid, Spain

A Chapel, A Semont, N Mathieu, C Linard, L Douay, N C Gorin, M Mothy, J M Simmon, H Rouard, J J Lataillade, J Voswinkel, R Tamarat and M Benderitter
Institute of Radiological Protection and Nuclear Safety, France
Saint Antoine Hospital AP-HP, France
Pitie-Salpetriere University Hospital, France
Percy Military Hospital, France
UPMC University, France
Posters & Accepted Abstracts: J Stem Cell Res Ther
DOI: 10.4172/2157-7633.C1.024
Abstract
The late adverse effects of pelvic radiotherapy concerns 5 to 10% of them, which could be life threatening. However, a clear medical consensus concerning the clinical management of such healthy tissue sequelae does not exist. Our group has demonstrated in preclinical animal models, that systemic (Mesenchymal Stem Cells) MSC injection is a promising approach for the medical management of gastrointestinal disorder after irradiation. We have shown that MSC migrate to damaged tissues and restore gut functions after irradiation. The clinical status of four first patients suffering from severe pelvic side effects resulting from an overdosage was improved following MSC injection in a compassioned situation. A quantity of 2x106 - 6x106 MSC/kg were infused intravenously to the patients. Pain, hemorrhage, frequency of diarrheas and fistulisation as well as the lymphocyte subsets in peripheral blood were evaluated before MSC therapy and during the follow-up. Two patients revealed a substantiated clinical response for pain and hemorrhage after MSC therapy. In one patient, pain reappeared after 6 months and again substantially responded on a second MSC infusion. A beginning fistulisation process could be stopped in one patient resulting in a stable remission for more than 3 years of follow-up. The frequency of painful diarrhea diminished from an average of 6/d to 3/d after the first and 2/d after the second MSC injection in one patient. In all patients, prostate cancer remained in stable complete remission. A modulation of the lymphocyte subsets towards a regulatory pattern and deminition of activated T cells accompanies clinical response in refractory irradiationinduced colitis. No toxicity occurred. MSC therapy was safe and effective, with no pain, diarrhea, haemorrhage, inflammation, fibrosis and limited fistulisation. For patients with refractory chronic inflammatory and fistulising bowel diseases, systemic MSC injections represent a safe option for salvage therapy. A clinical phase II trial will start in 2017.
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