Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5841390 | Life Sciences | 2016 | 35 Pages |
Abstract
Kaempferol (KEM) has been observed to stimulate Krt-14 protein which subsequently contributes to matrix maturation and mineralization in rat primary osteoblast cells. Incorporation of Krt-14 siRNA results in reduced mRNA and protein expression after 48Â h post transfection and remained low for 9Â days. At day 9 Krt-14 siRNA significantly reduced mineralization without concomitant change in the cell number. ColI and OCN gene expression was reduced in Krt-14 siRNA-treated osteoblast cells. Soluble osteocalcin and collagen levels were markedly decreased in conditioned medium as well as in acid-salt soluble cell-ECM layer treated with Krt-14 siRNA compared to control siRNA treated cells corroborated at the ultrastructral level by AFM. Further, knockdown of Krt-14 and inhibitors against AMPK and mTOR, repressed the activation of mTOR and mineralization attenuated by KEM confirmed the role of Krt-14 in mineralization. These findings strongly suggest that Krt-14 regulates osteoblast mineralization by organizing osteoblast derived ECM.
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Authors
Vikram Khedgikar, Priyanka Kushwaha, Jyoti Gautam, Shewta Sharma, Ashwni Verma, Dharmendra Choudhary, Prabhat R. Mishra, Ritu Trivedi,