Genomic and functional comparison of mesenchymal stromal cells prepared using two isolation methods.

Abstract:

BACKGROUND AIMS:Mesenchymal stromal cells (MSCs) have been applied to patients in cell therapy for various diseases. Recently, we introduced a novel MSC separation filter device which could yield approximately 2.5-fold more MSCs from bone marrow in a closed system compared with the conventional open density gradient centrifugation method. MSCs isolated with these two methods were phenotypically similar and met the criteria defining human MSC proposed by the International Society for Cellular Therapy. However, these criteria do not reflect the functional capacity of MSCs. It has been shown that the donor, source, isolation method, culture condition and cryopreservation of MSCs have potential to alter their therapeutic efficacy. To determine the equivalency of MSCs isolated by these two methods, we compared their genomic profiles as an index of their biologic potential and evaluated their growth promoting potential as an index of function. METHODS:The gene expression profiles of human MSCs isolated from 5 healthy donors with two distinct methods were obtained from microarray analyses. The functional activity of freshly expanded/cryopreserved MSCs from these two isolation methods was evaluated using an in vitro chondrocyte proliferation assay. RESULTS:Freshly expanded MSCs isolated by these two methods were found to exhibit similar gene expression profiles and equivalent therapeutic effects, while freshly thawed, cryopreserved MSCs lacked all measureable therapeutic activity. CONCLUSIONS:The MSC separation device generates genomically and functionally equivalent MSCs compared with the conventionally isolated MSCs, although freshly thawed, cryopreserved MSCs, isolated by either method, are devoid of activity in our bioassay.

journal_name

Cytotherapy

journal_title

Cytotherapy

authors

Otsuru S,Hofmann TJ,Raman P,Olson TS,Guess AJ,Dominici M,Horwitz EM

doi

10.1016/j.jcyt.2014.10.013

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

262-70

issue

3

eissn

1465-3249

issn

1477-2566

pii

S1465-3249(14)00838-X

journal_volume

17

pub_type

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