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TGF-beta1 induced the transdifferentiation of BM-derived EPCs toward SMC lineage mediated by TGF-beta RII. The augmentation of intimal hyperplasia by transplantation of EPCs was probably due to the transdifferentiation and proliferation of EPCs induced by TGF-beta1.

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Findings of radiosurgically treated AVMs on ASL images corresponded with those on DSA. The results of this study suggest that ASL imaging can be utilized to follow up AVMs after SRS and to decide their obliteration facilitate to decide the precise timing of catheter angiography for the final diagnosis of AVM obliteration after SRS.