The demonstration of αKlotho deficiency in human chronic kidney disease with a novel synthetic antibody
| Autor: | Makoto Kuro-o, Sachdev S. Sidhu, Henry Quiñones, Regina Goetz, Carolyn Griffith, Danielle Carranza, Moosa Mohammadi, Orson W. Moe, Jianfeng Ye, Ming Chang Hu, Sarah L. Barker, Johanne Pastor, Jianning Zhang |
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| Rok vydání: | 2014 |
| Předmět: |
Immunoblotting
Enzyme-Linked Immunosorbent Assay urologic and male genital diseases Antibodies Immunoglobulin Fab Fragments Mice Peptide Library medicine Animals Humans Immunoprecipitation Renal Insufficiency Chronic Klotho Proteins Klotho Glucuronidase Transplantation Kidney business.industry Pathogenic factor Case-control study Original Articles medicine.disease Cytoprotection Healthy Volunteers female genital diseases and pregnancy complications Rats Synthetic antibody Fibroblast Growth Factors medicine.anatomical_structure Nephrology Case-Control Studies Immunology Biomarker (medicine) business Biomarkers Kidney disease |
| Zdroj: | Nephrology Dialysis Transplantation. 30:223-233 |
| ISSN: | 1460-2385 0931-0509 |
| Popis: | αKlotho is the prototypic member of the Klotho family and is most highly expressed in the kidney. αKlotho has pleiotropic biologic effects, and in the kidney, its actions include regulation of ion transport, cytoprotection, anti-oxidation and anti-fibrosis. In rodent models of chronic kidney disease (CKD), αKlotho deficiency has been shown to be an early biomarker as well as a pathogenic factor. The database for αKlotho in human CKD remains controversial even after years of study.We used a synthetic antibody library to identify a high-affinity human antigen-binding fragment that recognizes human, rat and mouse αKlotho primarily in its native, rather than denatured, form.Using an immunoprecipitation-immunoblot (IP-IB) assay, we measured both serum and urinary levels of full-length soluble αKlotho in humans and established that human CKD is associated with αKlotho deficiency in serum and urine. αKlotho levels were detectably lower in early CKD preceding disturbances in other parameters of mineral metabolism and progressively declined with CKD stages. We also found that exogenously added αKlotho is inherently unstable in the CKD milieu suggesting that decreased production may not be the sole reason for αKlotho deficiency.Synthetic antibody libraries harbor tremendous potential for a variety of biomedical and clinical applications. Using such a reagent, we furnish data in support of αKlotho deficiency in human CKD, and we set the foundation for the development of diagnostic and therapeutic applications of anti-αKlotho antibodies. |
| Databáze: | OpenAIRE |
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