miR-146a, an IL-1β responsive miRNA, induces vascular endothelial growth factor and chondrocyte apoptosis by targeting Smad4

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Jing Li, Jingang Huang, Liming Dai, Degang Yu, Qian Chen, Xiaoling Zhang^* and Kerong Dai^*

* Corresponding authors: Xiaoling Zhang xlzhang@sibs.ac.cn - Kerong Dai krdai@sibs.ac.cn

Arthritis Research & Therapy 2012, 14:R75 doi:10.1186/ar3798