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Klotho as a Therapeutic Target during the Development of Renal Fibrosis
Abstract:
Systemic symptoms such as the ectopic calcification, atrophy of skin and muscle, and impaired sexual function observed in chronic kidney diseases (CKD) have been reported to coincide with those observed in geriatric symptoms. Regarding the kidney, clinical/pathological characteristics in CKD patients also coincide with those in the aging kidney. These findings suggest common mechanisms in the development of both CKD and aging. Our investigation of aging factors associated with renal fibrosis in IgA nephropathy patients revealed a significant correlation between accumulation of cells with an arrested cell cycle and decreased expression of Klotho protein. Because cell cycle arrest has a protective effect on organs in the acute phase, the proposed therapeutic target against the aging process is to maintain expression of Klotho protein. In addition, it is recognized that TGF-β1 plays a central role in the development of renal fibrosis. However, TGF-β1 has also been reported to decrease expression of Klotho protein. In this report, we provide an interpretation of our new treatment strategy which involves controlling histone methylation.
Insights
Chronic kidney disease (CKD) shares aging mechanisms, with cell cycle arrest linked to lower Klotho protein in IgA nephropathy. Maintaining Klotho may combat aging and kidney fibrosis.
Area of Science:
- Nephrology
- Gerontology
- Molecular Biology
Background:
- Chronic kidney disease (CKD) exhibits systemic and renal symptoms mirroring geriatric conditions, suggesting shared underlying mechanisms.
- Aging kidneys and CKD kidneys display similar clinical and pathological characteristics.
- Investigating aging factors in IgA nephropathy revealed a link between cell cycle arrest and reduced Klotho protein expression.
Purpose of the Study:
- To explore the relationship between aging factors and renal fibrosis in IgA nephropathy.
- To identify potential therapeutic targets for mitigating aging processes and kidney disease progression.
Main Methods:
- Analysis of aging factors in IgA nephropathy patients.
- Correlation studies between cell cycle arrest, Klotho protein expression, and renal fibrosis.
- Exploration of the role of TGF-β1 in Klotho protein regulation.
- Interpretation of a novel therapeutic strategy involving histone methylation control.
Main Results:
- A significant correlation was found between accumulated cells with arrested cell cycles and decreased Klotho protein expression in IgA nephropathy patients.
- Cell cycle arrest demonstrates a protective effect in acute phases, highlighting the importance of maintaining Klotho protein.
- Transforming growth factor-beta 1 (TGF-β1), a key factor in renal fibrosis, also reduces Klotho protein expression.
Conclusions:
- CKD and aging share common pathogenic mechanisms, particularly concerning renal fibrosis.
- Maintaining Klotho protein expression is a potential therapeutic strategy against aging and kidney disease.
- Controlling histone methylation presents a novel treatment approach for managing these conditions.
