کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2779613 1153277 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
EphB/ephrin-B interactions mediate human MSC attachment, migration and osteochondral differentiation
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی تکاملی
پیش نمایش صفحه اول مقاله
EphB/ephrin-B interactions mediate human MSC attachment, migration and osteochondral differentiation
چکیده انگلیسی

Bone marrow derived mesenchymal stem/stromal cells (MSC) contribute to skeletal tissue formation and the regulation of haematopoiesis. The Eph/ephrin family of receptor tyrosine kinases is potentially important in the maintenance of the stem cell niche within neural, intestinal and dental tissues and has recently been shown to play a role in regulating bone homeostasis. However, the contribution of EphB/ephrin-B molecules in human MSC function remains to be determined. In the present study, EphB and ephrin-B molecules were expressed by ex vivo expanded human MSC populations and within human bone marrow trephine samples. To elucidate the contribution of EphB/ephrin-B molecules in MSC recruitment, we performed functional spreading and migration assays and showed that reverse ephrin-B signalling inhibited MSC attachment and spreading by activating Src-, PI3Kinase- and JNK-dependent signalling pathways. In contrast, forward EphB2 signalling promoted MSC migration by activating the Src kinase- and Abl-dependent signalling pathways. Furthermore, activation of ephrin-B1 and/or ephrin-B2 molecules expressed by MSC was found to increase osteogenic differentiation, while ephrin-B1 activation promoted chondrogenic differentiation. These observations suggest that EphB/ephrin-B interactions may mediate the recruitment, migration and differentiation of MSC during bone repair.

Research Highlights
► First description of EphB/ephrin-B molecule expression in human MSC.
► EphB/ephrin-B expression within MSC bone marrow perivascular niche.
► EphB/ephrin-B may mediate MSC recruitment and differentiation during bone repair.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bone - Volume 48, Issue 3, 1 March 2011, Pages 533–542
نویسندگان
, , , , , , , ,