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Journal of Translational Medicine
BioMedCentral
Open Access Research Feasibility investigation of allogeneic endometrial regenerative cells 1 23 3 Zhaohui Zhong, Amit N Patel, Thomas E Ichim*, Neil H Riordan, 4 45 6 Hao Wang, WeiPing Min, Erik J Woods, Michael Reid, 7 77 8 Eduardo Mansilla, GustavoH Marin, HugoDrago ,Michael P Murphyand 9,10 Boris Minev
1 2 Address: TheSecond Xiangya Hospital, Central South University, Changsha, PR China,Department of Cardiothoracic Surgery, University of 3 45 Utah, Salt Lake City, USA,Medistem Inc, San Diego, USA,Department of Surgery, University of Western Ontario, Canada,General 6 78 Biotechnology LLC, Indiana, USA,Body in Motion Consulting, Kitchener, Canada,Burns Hospital, Buenos Aires City, Argentina,Division of 9 10 Vascular Surgery, Indiana University School of Medicine, Indiana, USA,Moores Cancer Center, University of California, San Diego andDivision of Neurosurgery, University of California San Diego, San Diego, USA Email: Zhaohui Zhong  jzhonguro@gmail.com; Amit N Patel  dallaspatel@gmail.com; Thomas E Ichim*  thomas.ichim@gmail.com; Neil H Riordan  nhriordan@gmail.com; Hao Wang  hwang1@uwo.ca; WeiPing Min  weiping.min@uwo.ca; Erik J Woods  Erik@gnrlbiotech.com; Michael Reid  mreidnd@gmail.com; Eduardo Mansilla  edmansil@netverk.com.ar; Gustavo H Marin  gmarin@netverk.com.ar; Hugo Drago  hdrago@fibertel.com.ar; Michael P Murphy  mipmurph@iupui.edu; Boris Minev  bminev@ucsd.edu * Corresponding author
Published: 20 February 2009Received: 15 January 2009 Accepted: 20 February 2009 Journal of Translational Medicine2009,7:15 doi:10.1186/1479-5876-7-15 This article is available from: http://www.translational-medicine.com/content/7/1/15 © 2009 Zhong et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract Endometrial Regenerative Cells (ERC) are a population of mesenchymal-like stem cells having pluripotent differentiation activity and ability to induce neoangiogenesis. In vitro and animal studies suggest ERC are immune privileged and in certain situations actively suppress ongoing immune responses. In this paper we describe the production of clinical grade ERC and initial safety experiences in 4 patients with multiple sclerosis treated intravenously and intrathecally. The case with the longest follow up, of more than one year, revealed no immunological reactions or treatment associated adverse effects. These preliminary data suggest feasibility of clinical ERC administration and support further studies with this novel stem cell type.
Introduction Endometrial Regenerative Cells (ERC) are a population of plastic adherent, mesenchymallike stem cells that are possess in vitro pluripotency, and in vivo therapeutic activity in models of limb ischemia and infarcts [14]. Phenotypically ERC appear to share some markers with mesenchymal stem cells such as CD90 and CD105 but are unique in that they express hTERT and OCT4 [1,2]. Immunological characterization of ERC revealed hypoim munogenicity when used as stimulators in mixed lym phocyte reaction, as well as active suppression of
proliferating T cells in vitro. In vivo ERC appear to induce therapeutic effects in immune competent xenogeneic recipients [4]. Thus theoretically ERC may be useful as an allogeneic "offtheshelf" therapy.
The use of allogeneic cells as a therapeutic approach in immune competent recipients has previously been per formed with bone marrow derived mesenchymal stem cells (MSC) which are known to inhibit ongoing mixed lymphocyte reaction (MLR) [5], induce generation of T regulatory cells [6], and suppress autoimmunityin vivoin
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