Research Article

Notch Signaling Inhibition by LY411575 Attenuates Osteoblast Differentiation and Decreased Ectopic Bone Formation Capacity of Human Skeletal (Mesenchymal) Stem Cells

Figure 5

LY411575 inhibits in vivo ectopic bone formation. LY411575-treated hBMSCs and control hBMSCs were implanted with hydroxyl apatite/tricalcium phosphate (HA/TCP) subcutaneously into immune-deficient mice. The histology of in vivo bone formation was examined using H&E (a) and Sirius red (b) staining. Black arrows in (a) indicate bone formation (magnification 10x), and black line shows the bone formed zone (magnification 20x). In Sirius red-stained slides (b), red color indicates collagen tissue staining. Magnification 10x (first row; ) and magnification 20x (second row; ). Quantification of ectopic bone formation was performed with H&E (c) and Sirius red (d) staining ( implants/treatment) ; . H&E: hematoxylin and eosin.
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