The dynamic in vivo distribution of bone marrow-derived mesenchymal stem cells after infusion

Cells, Tissues, Organs
J GaoA I Caplan

Abstract

Bone marrow-derived mesenchymal stem cells (MSCs) have the potential to differentiate along different mesenchymal lineages including those forming bone, cartilage, tendon, fat, muscle and marrow stroma that supports hematopoiesis. This differentiation potential makes MSCs candidates for cell-based therapeutic strategies for mesenchymal tissue injuries and for hematopoietic disorders by both local and systemic application. In the present study, rat marrow-derived MSCs were ex vivo culture-expanded, labeled with (111)In-oxine, and infused into syngeneic rats via intra-artery (i.a.), intravenous (i.v.) and intraperitoneal cavity (i.p.) infusions. In addition, for i.a. and i.v. infusions, a vasodilator, sodium nitroprusside, was administered prior to the cell infusion and examined for its effect on MSC circulation. The dynamic distribution of infused MSCs was monitored by real-time imaging using a gamma camera immediately after infusion and at 48 h postinfusion. After 48 h, radioactivity in excised organs, including liver, lungs, kidneys, spleen and long bones, was measured in a gamma well counter and expressed as a percentage of injected doses. After both i.a. and i.v. infusion, radioactivity associated with MSCs was detected prim...Continue Reading

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