2014 Fiscal Year Final Research Report
Muscle atrophy in patients with CKD results from FGF23/klotho-mediated suppression of Insulin/IGF-I signaling
| Project/Area Number |
24790847
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Kidney internal medicine
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| Research Institution | Kinki University (2013-2014)
The University of Tokushima (2012) |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 慢性腎臓病 / 筋萎縮 / ロコモティブ症候群 / 栄養 / 食事療法 / 臨床栄養 / 生活習慣病 |
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| Outline of Final Research Achievements |
Muscle atrophy is a significant consequence of CKD that increases a patient’s risk of mortality and decrease their QOL. In these patients, the circulation levels of FGF23 are significantly increased, but the relationship between FGF23 and muscle atrophy are not clear. In this study, we attempted to identify the causative factors responsible for the shedding of Klotho, and whether both FGF23 and Klotho induced muscle atrophy. As a results, we found that AGEs, an accumulated in patients with CKD, increases shedding of Klotho in kidney cells. Moreover, we demonstrated that both FGF23 and sKlotho inhibited differentiation of cultured skeletal muscle cells through down-regulation of insulin/IGF-1 signaling. These observations suggested a divergent role of FGF23 and sKlotho in the regulation of skeletal muscle differentiation and thereby muscle atrophy under the pathological conditioned in CKD patients.
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| Free Research Field |
骨・ミネラル代謝
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