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10.1681/ASN.2015111266 http://scihub22266oqcxt.onion/10.1681/ASN.2015111266 C5373441!5373441 !27837149     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27837149 &cmd=llinks): Failed to open stream: HTTP request failed! 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Chronic Hyperphosphatemia and Vascular Calcification Are Reduced by Stable Delivery of Soluble Klotho |pdf=|usr=}}{{27837149 }} gab.com Text Chronic Hyperphosphatemia and Vascular Calcification Are Reduced by Stable Delivery of Soluble Klotho JO: J Am Soc Nephrol http://www.kidney.de/pget.php?&tw=1&pmid=27837149 #FOAvip ?Klotho (?KL) regulates mineral metabolism, and diseases associated with ?KL deficiency are characterized by hyperphosphatemia and vascular calcification (VC). ?KL is expressed as a membrane-bound protein (mKL) and recognized as the coreceptor for fibroblast growth factor-23 (FGF23) and a circulating soluble form (cKL) created by endoproteolytic cleavage of mKL. The functions of cKL with regard to phosphate metabolism are unclear. We tested the ability of cKL to regulate pathways and phenotypes associated with hyperphosphatemia in a mouse model of CKD-mineral bone disorder and ?KL-null mice. Stable delivery of adeno-associated virus (AAV) expressing cKL to diabetic endothelial nitric oxide synthase-deficient mice or ?KL-null mice reduced serum phosphate levels. Acute injection of recombinant cKL downregulated the renal sodium-phosphate cotransporter Npt2a in ?KL-null mice supporting direct actions of cKL in the absence of mKL. ?KL-null mice with sustained AAV-cKL expression had a 74%-78% reduction in aorta mineral content and a 72%-77% reduction in mineral volume compared with control-treated counterparts (P<0.01). Treatment of UMR-106 osteoblastic cells with cKL + FGF23 increased the phosphorylation of extracellular signal-regulated kinase 1/2 and induced Fgf23 expression. CRISPR/Cas9-mediated deletion of fibroblast growth factor receptor 1 (FGFR1) or pretreatment with inhibitors of mitogen-activated kinase kinase 1 or FGFR ablated these responses. In summary, sustained cKL treatment reduced hyperphosphatemia in a mouse model of CKD-mineral bone disorder, and it reduced hyperphosphatemia and prevented VC in mice without endogenous ?KL. Furthermore, cKL stimulated Fgf23 in an FGFR1-dependent manner in bone cells. Collectively, these findings indicate that cKL has mKL-independent activity and suggest the potential for enhancing cKL activity in diseases of hyperphosphatemia with associated VC. Twit Text FOAVip Chronic Hyperphosphatemia and Vascular Calcification Are Reduced by Stable Delivery of Soluble Klotho ????J Am Soc Nephrol http://www.kidney.de/pget.php?&tw=1&pmid=27837149 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=27837149 #FOAvip English Wikipedia <ref>{{Cite pmid|27837149 }}</ref> Chronic Hyperphosphatemia and Vascular Calcification Are Reduced by Stable Delivery of Soluble Klotho #MMPMID27837149 Hum JM ; O'Bryan LM ; Tatiparthi AK ; Cass TA ; Clinkenbeard EL ; Cramer MS ; Bhaskaran M ; Johnson RL ; Wilson JM ; Smith RC ; White KE J Am Soc Nephrol 2017[Apr]; 28 (4 ): 1162-1174 PMID27837149 show ga ?Klotho (?KL) regulates mineral metabolism, and diseases associated with ?KL deficiency are characterized by hyperphosphatemia and vascular calcification (VC). ?KL is expressed as a membrane-bound protein (mKL) and recognized as the coreceptor for fibroblast growth factor-23 (FGF23) and a circulating soluble form (cKL) created by endoproteolytic cleavage of mKL. The functions of cKL with regard to phosphate metabolism are unclear. We tested the ability of cKL to regulate pathways and phenotypes associated with hyperphosphatemia in a mouse model of CKD-mineral bone disorder and ?KL-null mice. Stable delivery of adeno-associated virus (AAV) expressing cKL to diabetic endothelial nitric oxide synthase-deficient mice or ?KL-null mice reduced serum phosphate levels. Acute injection of recombinant cKL downregulated the renal sodium-phosphate cotransporter Npt2a in ?KL-null mice supporting direct actions of cKL in the absence of mKL. ?KL-null mice with sustained AAV-cKL expression had a 74%-78% reduction in aorta mineral content and a 72%-77% reduction in mineral volume compared with control-treated counterparts (P<0.01). Treatment of UMR-106 osteoblastic cells with cKL + FGF23 increased the phosphorylation of extracellular signal-regulated kinase 1/2 and induced Fgf23 expression. CRISPR/Cas9-mediated deletion of fibroblast growth factor receptor 1 (FGFR1) or pretreatment with inhibitors of mitogen-activated kinase kinase 1 or FGFR ablated these responses. In summary, sustained cKL treatment reduced hyperphosphatemia in a mouse model of CKD-mineral bone disorder, and it reduced hyperphosphatemia and prevented VC in mice without endogenous ?KL. Furthermore, cKL stimulated Fgf23 in an FGFR1-dependent manner in bone cells. Collectively, these findings indicate that cKL has mKL-independent activity and suggest the potential for enhancing cKL activity in diseases of hyperphosphatemia with associated VC. |Animals [MESH] |Bone and Bones/metabolism [MESH] |Chronic Disease [MESH] |Diabetic Nephropathies/complications [MESH] |Disease Models, Animal [MESH] |Female [MESH] |Fibroblast Growth Factor-23 [MESH] |Glucuronidase/administration & dosage/physiology/*therapeutic use [MESH] |Hyperphosphatemia/*drug therapy/etiology [MESH] |Klotho Proteins [MESH] |Male [MESH] |Mice [MESH] |Mice, Knockout [MESH]Chronic Hyperphosphatemia and Vascular Calcification Are Reduced by St(epmc).pdf DeepDyve Pubget Overpricing