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2篇 您的检索式:作者名="Matthew J.Milner"
    题名 作者 年代 出处 被引量
1Identification of a novel pathway involving a GATA transcription factor in yeast and possibly in plant Zn uptake and homeostasis显示文摘To gain a better understanding of the regulation of Zn homeostasis in plants and the degree of conservation of Zn homeostasis between plants and yeast, a cDNA library from the Zn/Cd hyperaccumulating plant species, Noccaea caerulescens, was screened for its ability to restore growth under Zn limiting conditions in the yeast mutant zap1D. ZAP1 is a transcription factor that activates the Zn dependent transcription of yeast genes involved in Zn uptake, including ZRT1, the yeast high affinity Zn transporter. From this screen two members of the E2F family of transcription factors were found to activate ZRT1 expression in a Zn independent manner. The activation of ZRT1 by the plant E2F proteins involves E2F‐mediated activation of a yeast GATA transcription factor which in turn activates ZRT1 expression. A ZRT1 promoter region necessary for activation by E2F and GATA proteins is upstream of two zinc responsive elements previously shown to bind ZAP1in ZRT1. This activation may not involve direct binding of E2F to the ZRT1 promoter. The expression of E2F genes in yeast does not replace function of ZAP1; instead it appears to activate a novel GATA regulatory pathway involved in Zn uptake and homeostasis that is not Zn responsive.Matthew J.Milner Nicole S.Pence Jiping Liu Leon V.Kochian 2014Journal of Integrative Plant Biology2014,56,3:3
2Mineralized collagen scaffolds fabricated with amniotic membrane matrix increase osteogenesis under inflammatory conditions显示文摘Defects in craniofacial bones occur congenitally,after high-energy impacts,and during the course of treatment for stroke and cancer.These injuries are difficult to heal due to the overwhelming size of the injury area and the inflammatory environment surrounding the injury.Significant inflammatory response after injury may greatly inhibit regenerative healing.We have developed mineralized collagen scaffolds that can induce osteogenic differentiation and matrix biosynthesis in the absence of osteogenic media or supplemental proteins.The amniotic membrane is derived from placentas and has been recently investigated as an extracellular matrix to prevent chronic inflammation.Herein,we hypothesized that a mineralized collagen-amnion composite scaffold could increase osteogenic activity in the presence of inflammatory cytokines.We report mechanical properties of a mineralized collagen-amnion scaffold and investigated osteogenic differentiation and mineral deposition of porcine adipose-derived stem cells within these scaffolds as a function of inflammatory challenge.Incorporation of amniotic membrane matrix promotes osteogenesis similarly to un-modified mineralized collagen scaffolds,and increases in mineralized collagen-amnion scaffolds under inflammatory challenge.Together,these findings suggest that a mineralized collagen-amnion scaffold may provide a beneficial environment to aid craniomaxillofacial bone repair,especially in the course of defects presenting significant inflammatory complications.Marley J.Dewey Eileen M.Johnson Simona T.Slater Derek J.Milner Matthew B.Wheeler Brendan A.C.Harley 2020Regenerative Biomaterials2020,7,3:2
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