间充质干细胞
归巢(生物学)
骨髓
体内
脾脏
病理
造血
医学
硝普钠
干细胞
生物
内科学
细胞生物学
一氧化氮
生态学
生物技术
作者
Jizong Gao,James E. Dennis,Raymond F. Muzic,Magnus Lundberg,Arnold I. Caplan
出处
期刊:Cells Tissues Organs
[S. Karger AG]
日期:2001-01-01
卷期号:169 (1): 12-20
被引量:914
摘要
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 <sup>111</sup>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 primarily in the lungs and then secondarily in the liver and other organs. When sodium nitroprusside was used, more labeled MSCs cleared the lungs resulting in a larger proportion detected in the liver. Most importantly, the homing of labeled MSCs to the marrow of long bones was significantly increased by the pretreatment with vasodilator. These results indicate multiple homing sites for injected MSCs and that the distribution of MSCs can be influenced by administration of vasodilator.
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