Abstract
Flavonoids are known for their wide range of bioactive properties including beneficial effect on bone formation. Their intense metal ion chelating capacity endorsed their nomination as a new biomaterial for biomedical applications. The present study examined the functional role of Kaemferal-Zinc(II) (Kaem-Zn) complex in bone formation, in vitro and in vivo. The cyto-compatibility assay confirmed that upto 25 μM of Kaem and Kaem-Zn complex was non-toxic. In fact, it facilitates ALP activity and accumulation of calcium in osteoblast; it was confirmed by Alizarin red and von Kossa staining. In addition to this, osteoblast markers, Runx2, type 1 col., ALP mRNAs expression, and osteocalcin and osteonectin secretory proteins level were also induced by the Kaem-Zn complex. Furthermore, bone forming ability of Kaem and Kaem-Zn was assessed by zebrafish model. The optimal concentration of Kaem and Kaem-Zn was determined by the viability assay of Zebrafish larvae. Osteoblasts distribution in scale, vertebrae and caudal fin ossification was studied by alizarin red staining accompanied by confocal imaging were carried out in adult zebrafish exposed to Kaem and Kaem-Zn complex. To sum up, our findings showed that Kaem promotes bone growth, and Kaem-Zn complex has further strengthened it. Kaem-Zn complex could be an effectively explored and used use in bone tissue engineering.
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